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THK Base Isolation Catalog - Technical Book
CATALOG No.A-02-01E
2
Base Isolation of BuildingsTHK’s base isolation systems are capable of achieving base isolation even with lightweight buildings andtowering buildings, whose base isolation was difficult with the conventional systems. Buildings themselves can be designed normally. Our base isolation products are flexible earthquake-proof systems.
Applicable to various buildings
THK’s base isolation systems are capable of operatingeven with lightweight buildings. They can base isolate notonly heavy buildings that can be base isolated even withthe conventional systems, but also skyscrapers, woodenhouses and light-gauge steel structures.
Free cycle setting
Linear motion re-circulating guide CLB has a small friction coefficient (0.0012to 0.009) and its piece-to-piece variation is minimum (0.002 or less).Therefore, the bearing is capable of extending the service life of buildings(cycle of 5 seconds or longer), which were difficult to achieve with theconventional system, through setting the recovery/attenuation mechanisms.
Base-isolated frame
Separates the building from the ground,and serves as the base of conventionalbuildings. It is made from steel frames,concrete and laminate wood.
Lightweight buildings Mid- to low-rise buildingsCapable of base isolating wooden buildings, light-gaugesteel structures and reinforced concrete structures. Thosebuildings can be designed the same as conventionalbuildings.
Steel-framed and reinforced concrete mid- to low-risebuildings, such as complex housings and office buildings,can be base isolated.
Because our base isolationsystems support buildings, we combined THK product technologiesthat support these systems.THK’s base isolation systems use our core products includingLM Guides. Those base isolation systems, which have beendeveloped as applied versions of our products that employ ourreliability, experience, creativity and technological strengths,reflect THK’s unwavering confidence.
Linear re-circulating guide CLBBearing component that combines THK LM Guides crosswise
Linear guide CLB is a base isolation system that achieves a heavysustained load and an extremely low frictional force since the ballsin the LM block rotate on the raceways cut into the LM rail whilecirculating through the block. In addition, since the LM blockretains the LM rail via the balls, the bearing can also receive apulling load.
LMblock
Ball
LMrail
End plate
End seal
Also corresponds to tower buildings
Linear motion re-circulating guide CLB has a structurethat also withstands a pulling load. Even if the bearingsupporting a high-aspect-ratio building receives a pullingload, the building will not float.
3
High-rise buildings and skyscrapers
Viscous damping system RDTA damping system that uses THK Ball Screw
It absorbs earthquake energy that transmits to the building with ashearing resistance of a viscous body. Viscous damping systemRDT has a structure where the linear motion of the ball screw thatis converted with the ball screw nut into rotary motion, and ashearing force is applied to the viscous body filled between theinner tube connected with the nut and the fixed outer tube.
Motion of theshaft
Ball screw shaft
Ball screw nut
Outertube
Internal rotation
Recovery system (rubber material)Non-THK product
When an earthquake occurs, base isolated houses freely move inall horizontal directions from their foundations. Therefore, theyneed to be returned to their original neutral positions after theearthquake stops. For that purpose, those houses are equippedwith this type of recovery system (laminated rubber, etc.).
Since CLB has a tensile strength, it is capable of baseisolating high-rise, towering buildings, whose aspect ratiosare large.
Anti-seismic base (mat foundation slab)
It normally supports the weight of the building via abase isolation system, but in case of earthquake, itreceives the reaction force to relieve the buildingfrom vibrations.
4
From design of base-isolated houses to installation of base isolation systems,THK provides strong support.
Building of base-isolated houses involves various steps from the design to completion, ranging from technical works,such as ground survey and structural calculation, to practical works including material supply, construction andinstallation.
(Note) Judgement means one that is based on the design policy of the designer. For example, in some cases, even with those base-isolated buildings with height of 60 m or less and those constructed on category 1 ground, time calendar response analysis (ministerial approval) is selected in order to examine the plans in more details.
From design of a base-isolated house to installationof a base isolation system and its management
Buildingdesign
Building design
Height of the building
Judgement
Ground classification
Judgement
Judgement
Judgment
Building confirmation (e.g., specified administrative agency)
Company applyingTHK’s base isolation
systemTHK distributor, etc. THK
Foundation builderFoundation material
manufacturerInstallation site, etc.
Structural calculation
Position of the baseisolation layer
Groundsurvey
■ System selection■ System layout■ System estimate
■ Manufacture of thebase isolationsystem
■ Supply of the baseisolation system
■ System installationprocedure
Application forbuilding
construction
Materialorder
placement
Materialdelivery
Periodicinspection
Building of thefoundation and
installation of thebase isolation system
Baseisolationdesign
THK support items
■ System selection(1) Support with a structural
calculation systemresponding to baseisolation notification(see page 19)
(2) Referral of a partner designoffice
From building design to application for building construction
From material order placement to foundation buildingand base isolation system installation
60 m or below
Basic base isolation
Unnecessary
Technical standards (items 3 to 5 ofConstruction Ministry NotificationNo. 2009) + regulations on durability,etc.
Structural calculation (item 6 ofConstruction Ministry NotificationNo. 2009) + regulations on durability,etc.
Time calendar response analysis+ regulations on durability(ministerial approval)
Category 1 ground, or category 2 ground (no risk of liquefaction)
Over 60 m
Parts other than the basic base isolation(e.g., intermediate layer)
Necessary (paragraph 2, Article 20 of the BuildingStandard Law)
Category 3 ground, or category 2 groundwith risk of liquefaction
Application forrecommendation
Placing order for foundation material and steel basePlacing order for base isolation system installation
Placing order forbase isolation system
Placing order forbase isolation system
Delivery of baseisolation systemSystem installationprocedure
Foundation material and steelbase materialBase isolation system installation
Horizontal clearance a base-isolated building is required to secure
Ground classification Incidental conditions Application method Supplemental noteCategory 1 ground
Category 2 ground
Category 3 ground
No risk of liquefaction Risk of liquefaction
Technical standard (items 3 to 5 of Construction Ministry Notification No. 2009), or structuralcalculation (item 6 of Construction Ministry Notification No. 2009) and regulations on durability, etc.
Time calendar response analysis, etc. andregulations on durability (ministerial approval), etc.
It is necessary to take a measure toprevent the ground from subsidingsuch as soil improvement.
5
Precautions on designing a base-isolated building and installing a base isolation system
In building a base-isolated house, it is necessary to conduct a ground survey or the like. Since the building moveshorizontally in an earthquake, there are various precautions to be observed such as securing a horizontal clearanceand attention to be paid to piping.
Precautions on design
Precautions on installing a base isolation system
1. Survey of ground classificationIt is necessary to conduct a ground survey (boring) or obtain data of neighboring ground.
2. Securing a horizontal clearanceA base-isolated house is horizontally displaced from the foundation (land)in an earthquake or the like. Taking this into account, it is necessary tosecure a horizontal clearance according to the intended use. Outdoorequipment, such as that of air conditioners and boilers, must be installedon the building, instead of being placed on the foundation.In addition, it is obliged to post a notice stating that the house is base-isolated as information for third persons.
3. Structure of pipingBase-isolated buildings are horizontally displaced from the foundation (land) in an earthquakeor the like. Therefore, the piping systems such as water and sewage and gas must have flexiblestructures, and the electric wires and telephone cables need to have extra lengths.
1. Accurate leveling of theanchor plate
2. Checking the steps forinstalling CLB and RDT (RDTcentering procedure, etc.)
3. Leveling of the whole baseisolation system
4. Curing after the wholebase isolation system isinstalled
5. Removal of temporaryclamps of CLB
A Places used for passage by third persons Response displacement + 80 cmB Places used for passage by residents Response displacement + 20 cmC Places other than A and B Response displacement + 10 cm
If the response displacement is 30 cm
A 30cm+80cm=110cm
B 30cm+20cm=50cm
C 30cm+10cm=40cm
This building is a base-isolated houseThe base-isolated house moves horizontally in alarge earthquake.To avoid collision with the building, keep away fromthe surroundings of the building by approxi-mately xx cm.To prevent yourself from being caught betweenbuildings, secure an interval approximate-ly xx cm between the building and the fence orvehicle.
Example of notice board
Note: It is necessary to take ameasure to prevent the systemfrom moving during theinstallation.
technical book
Item Accuracy standard
6
Linear Guide CLB Cross TypeThe reference value of rolling friction coefficient and the upper limit of variations from the reference valueThe reference value of rolling friction coefficient of Linear Guide CLB and the upper limit of variations from thereference value are obtained from the following equations.
The reference value, definition and measurement method of the accuracy after the installationAfter installing the system, mount anchor plate and other devices so that the following definitions and accuracystandards are met.
CLB017(P0=162kN)
Vertical load: 161 kN (compression)
Friction coefficient (×1/1000)
Horizontal deformation (mm)
Friction coefficient (×1/1000)
Load ratio P/P0
ρ=51% (During compression)
Afte
rins
talla
tion Block displacement
Rail tilt angle θX
Rail crosswise tilt angle θY
Rail twist angle θZ
Installation level difference Δh
±5 mm or belowθX≦1/500 radθY≦1/500 radθZ≦1/300 radΔh≦±0.01H and Δh≦1.5mm
Direction Model number Rolling friction coefficient Upper limit of variations from µ
Compression
Tension
011~133031H~133H
250~780250H~780H
011~133031H~133H
250~780250H~780H
µ=(1.2+7.8×P/P0L)/1000
µ=(1.2+3.6×P/P0L)/1000
µ=(0.4+6.0×tP/tP0L)/1000
µ=(1.2+5.0×tP/tP0L)/1000
µmax1=µ×1.2µmax2=µ+0.002
µmax1=µ×1.2µmax2=µ+0.001
µmax=µ+0.002
µmax=µ+0.001
A-A’ arrow view B-B’ arrow view Plane view
* The upper limit of variations from the rollingfriction coefficient is either µ max1 or µ max2,whichever is greater, obtained from thefollowing equation.
* P and tP are loads applied on the bearing.
Reference value
Upper limit ofvariations
│(RL1-RL2)│/2θX=│(h1+h3)-(h2+h4)│/(FB1×2)θY=│(h1+h2)-(h3+h4)│/(FB2×2)θZ=│d1-d2│/L
─
840
860
880
920
940
1000
1020
1060
1070
2030
4085
32.5
6060
92.5
8534
5279
111
136
199
248
335
441
940
960
980
1020
1040
1100
1120
1160
1170
2030
4060
82.5
5560
8060
3858
8712
315
021
626
936
347
610
4010
6010
8011
2011
4012
0012
2012
6012
7020
3040
3570
5060
67.5
3541
6496
134
163
234
290
390
510
1140
1160
1180
1220
1240
1300
1320
1360
1370
2030
4085
57.5
4560
5585
4570
104
145
176
252
311
417
545
1240
1260
1280
1320
1340
1400
1420
1460
1470
2030
4060
4540
6042
.560
4975
112
156
189
269
332
444
579
1340
1360
1380
1420
1440
1500
1520
1560
1570
2030
4035
32.5
3560
92.5
3553
8112
116
720
228
635
347
261
4
7
technical bookD
ime
nsi
on
al ta
ble
La
nd, T
rans
por
t and
Infr
astr
uctu
re M
inis
ter
Ap
pro
val N
o. :
MV
BR
-019
8, 0
199,
020
0
Mod
el n
umbe
r of
the
syst
emCL
B011
CLB0
17CL
B021
CLB0
31CL
B041
CLB0
61CL
B082
CLB0
99CL
B133
Exte
rnal
dimen
sions
Fla
nge
plat
e
LM b
lock
LM r
ail
Lo
ng
-te
rmp
erm
issib
le lo
ad
(kN
)
Sh
ort
-te
rmp
erm
issib
le lo
ad
(kN
)
Ver
tical
rig
idity
(kN
/mm
)
Hei
ght
Wid
th
Thi
ckne
ss
Hole
diam
eter
(Bol
t use
d)
Long
itudin
al pit
ch
Width
pitch
(max
)
Widt
h pitc
h (mi
n)
Wid
th
Leng
th
Hei
ght
Wid
th
Com
pres
sion
Ten
sion
Com
pres
sion
Ten
sion
Com
pres
sion
Ten
sion
H WF
P
TF
P
DF
P
(BF
P)
PF
PL
PFPS
MAX
PFPS
MIN
W L M1
W1
P0L
tP0L
P0A
S
tP0A
S
K tK
Limit
defor
matio
nδs
t
Up
per
:Fl
ang
e p
late
leng
th L
FP(m
m)
Mid
dle
:Fl
ange
pla
te m
ount
ing
hole
out
er e
dge
dist
ance
g (m
m)
Low
er:
Pro
duc
t mas
s (k
g)
Lim
it d
efor
mat
ion:
dim
ensi
on a
t w
hich
tra
vel
from
the
neu
tral
pos
ition
is p
ossi
ble
For
limit
def
orm
atio
ns o
ther
than
the
tab
le a
bov
e, c
onta
ct T
HK
.
350
400
450
500
550
600
CLB0
11CL
B017
CLB0
21CL
B031
CLB0
41CL
B061
CLB0
82CL
B099
CLB1
33
Un
it :
mm
Sta
nd
ard
se
t
93.5
117
143.
516
218
521
824
026
430
817
019
521
027
030
034
537
042
546
512
1622
2222
2528
3236
1114
1418
1818
1822
24(M
10)
(M12
)(M
12)
(M16
)(M
16)
(M16
)(M
16)
(M20
)(M
22)
100
100
100
150
125
110
100
125
150
125
145
160
200
230
275
305
340
370
110
130
140
170
190
220
250
280
330
7290
100
120
140
170
195
215
260
102
120.
513
517
119
8.8
244.
427
1.6
300.
432
2.8
1721
24.5
2936
.543
4448
5725
2833
4553
6375
8510
011
316
221
030
340
260
080
097
213
000
00
00
00
00
226
324
420
606
804
1200
1600
1944
2600
2439
7785
8711
414
918
825
755
671
275
098
210
6713
3117
6221
0622
4252
8197
127
155
181
233
262
282
8
Dim
en
sio
na
l ta
ble
La
nd, T
rans
por
t and
Infr
astr
uctu
re M
inst
er A
pp
rova
l No.
: M
VB
R-0
198,
019
9, 0
200
Mod
el n
umbe
r of
the
syst
emCL
B031
HCL
B041
HCL
B061
HCL
B082
HCL
B099
HCL
B133
H
Ext
erna
l dim
ensi
ons
Fla
nge
plat
e
LM b
lock
LM r
ail
Long
-term
per
miss
ible
load
(kN
)
Shor
t-ter
m p
erm
issibl
e loa
d(k
N)
Verti
cal r
igid
ity (k
N/m
m)
Hei
ght
Wid
th
Thi
ckne
ss
Hol
e di
amet
er
(Bol
t use
d)
Long
itudi
nal p
itch
Wid
th p
itch
(max
)
Wid
th p
itch
(min
)
Wid
th
Leng
th
Hei
ght
Wid
th
Com
pres
sion
Ten
sion
Com
pres
sion
Ten
sion
Com
pres
sion
Ten
sion
H WF
P
TF
P
DF
P
(BF
P)
PF
PL
PFPS
MAX
PFPS
MIN
W L M1
W1
P0L
tP0L
P0A
S
tP0A
S
K tK
174
205
244
274
290
336
270
300
345
370
425
465
2832
3845
4550
1818
1818
2224
(M16
)(M
16)
(M16
)(M
16)
(M20
)(M
22)
150
125
110
100
125
150
200
230
275
305
340
370
170
190
220
250
280
330
120
140
170
195
215
260
171
198.
824
4.4
271.
630
0.4
322.
829
36.5
4344
4857
4553
6375
8510
030
340
260
080
097
213
000
00
00
060
680
412
0016
0019
4426
0016
824
132
545
545
555
798
210
6713
3117
6221
0622
4212
715
518
123
326
228
2
Un
it :
mm
Te
nsi
on
se
t
920
940
1000
1020
1060
1070
8532
.560
6092
.585
135
180
269
348
426
549
1020
1040
1100
1120
1160
1170
6082
.555
6080
6014
819
829
337
946
259
411
2011
4012
0012
2012
6012
7035
7050
6067
.535
162
216
318
410
498
639
1220
1240
1300
1320
1360
1370
8557
.545
6055
8517
623
434
244
153
468
413
2013
4014
0014
2014
6014
7060
4540
6042
.560
189
252
367
471
570
729
1420
1440
1500
1520
1560
1570
3532
.535
6092
.535
203
270
391
502
606
773
Limit
defor
matio
nδs
t
350
400
450
500
550
600
CLB
031H
CLB
041H
CLB
061H
CLB
082H
CLB
099H
CLB
133H
Up
per
:Fl
ang
e p
late
leng
th L
FP(m
m)
Mid
dle
:Fl
ang
e p
late
mou
ntin
g h
ole
oute
r ed
ge
dis
tanc
e g
(m
m)
Low
er:
Pro
duc
t mas
s (k
g)
Lim
it d
efor
mat
ion:
dim
ensi
on a
t w
hich
tra
vel
from
the
neu
tral
pos
ition
is p
ossi
ble
For
limit
def
orm
atio
ns o
ther
than
the
tab
le a
bov
e, c
onta
ct T
HK
.
9
Dim
en
sio
na
l ta
ble
La
nd, T
rans
por
t and
Infr
astr
uctu
re M
inst
er A
pp
rova
l No.
: M
VB
R-0
198,
019
9, 0
200
Un
it :
mm
Te
nsi
on
se
tS
tan
da
rd s
et
Mod
el n
umbe
r of
the
syst
emCL
B250
CLB3
85CL
B500
CLB7
80CL
B250
HCL
B385
HCL
B500
HCL
B780
H
Ext
erna
l dim
ensi
ons
Fla
nge
plat
e
LM b
lock
LM r
ail
Long
-term
per
miss
ible
load
(kN
)
Shor
t-ter
m p
erm
issibl
e loa
d(k
N)
Verti
cal r
igid
ity (k
N/m
m)
Hei
ght
Wid
th
Thi
ckne
ss
Hol
e di
amet
er
(Bol
t use
d)
Long
itudi
nal p
itch
Wid
th p
itch
Wid
th
Leng
th
Hei
ght
Wid
th
Com
pres
sion
Ten
sion
Com
pres
sion
Ten
sion
Com
pres
sion
Ten
sion
H WF
P
TF
P
DF
P
(BF
P)
PF
PL
PF
PS
W L M1
W1
P0L
tP0L
P0A
S
tP0A
S
K tK
448
538
599
730
478
578
649
770
465
555
630
740
465
555
630
740
4045
5060
5565
7580
2426
3033
2426
3033
(M22
)(M
24)
(M27
)(M
30)
(M22
)(M
24)
(M27
)(M
30)
140
150
150
200
140
150
150
200
370
450
520
620
370
450
520
620
330
410
465
560
330
410
465
560
419
519
584
722
419
519
584
722
7085
9812
070
8598
120
130
160
180
230
130
160
180
230
2451
3775
4903
7649
2451
3775
4903
7649
00
00
00
00
4902
7550
9806
1529
849
0275
5098
0615
298
410
481
588
880
948
1366
1777
2171
3471
5171
6120
7957
3471
5171
6120
7957
245
315
388
468
245
315
388
468
1570
1670
1770
1870
1570
1670
1770
1870
8585
6013
585
8560
135
908
1477
1934
3216
1079
1767
2369
3648
1670
1770
1870
1970
1670
1770
1870
1970
6560
110
8565
6011
085
951
1538
2010
3329
1133
1845
2470
3784
1770
1870
1970
2070
1770
1870
1970
2070
4535
8513
545
3585
135
994
1599
2086
3443
1187
1923
2570
3920
1870
1970
2070
2170
1870
1970
2070
2170
9585
6085
9585
6085
1037
1660
2163
3556
1241
2001
2671
4057
1970
2070
2170
2270
1970
2070
2170
2270
7560
110
135
7560
110
135
1080
1721
2239
3669
1295
2080
2772
4193
Limit
defor
matio
nδs
t
550
600
650
700
750
CLB2
50CL
B385
CLB5
00CL
B780
CLB2
50H
CLB3
85H
CLB5
00H
CLB7
80H
Up
per
:Fl
ang
e p
late
leng
th L
FP(m
m)
Mid
dle
:Fl
ange
pla
te m
ount
ing
hole
out
er e
dge
dist
ance
g (m
m)
Low
er:
Pro
duc
t mas
s (k
g)
Lim
it d
efor
mat
ion:
dim
ensi
on a
t w
hich
tra
vel
from
the
neut
ral p
ositi
on is
pos
sib
leF
or
limit
de
form
ati
on
s o
the
r th
an
th
e t
ab
le a
bo
ve,
cont
act T
HK
.
technical book
10
Linear Rotary Bearing CLB キ TypeThe reference value of rolling friction coefficient and the upper limit of variations from the reference valueThe reference value of rolling friction coefficient of Linear Rotary Bearing CLB and the upper limit of variations fromthe reference value are obtained from the following equations.
Direction Model number Rolling friction coefficient Upper limit of variations from µ
Compression
Tension
µ=(1.2+3.6×P/P0L)/1000
µ=(1.2+5.0×tP/tP0L)/1000
1000T~1560T
1000TH~1560THµmax=µ+0.002
Friction coefficient (×0.001)
Compressive load ratio P/P0
* P and tP are loads applied on thebearing.
Reference value
Upper limit ofvariations
Item Accuracy standard
The reference value, definition and measurement method of the accuracy after the installationAfter installing the system, mount anchor plate and other devices so that the following definitions and accuracystandards are met.
Afte
rins
talla
tion Block displacement
Rail tilt angle θX
Rail crosswise tilt angle θY
Rail twist angle θZ
Installation level difference Δh
±5 mm or belowθX≦1/500 radθY≦1/500 radθZ≦1/500 radΔh≦±0.01H and Δh≦1.5mm
│(RL1-RL2)│/2θX=│(h1+h3)-(h2+h4)│/(FB1×2)θY=│(h1+h2)-(h3+h4)│/(FB2×2)θZ=│d1-d2│/L
─
A-A’ arrow view B-B’ arrow view Plane view
11
Dim
en
sio
na
l ta
ble
La
nd, T
rans
por
t and
Infr
astr
uctu
re M
inst
er A
pp
rova
l No.
: M
VB
R-0
267,
026
8, 0
269
Mod
el n
umbe
r of
the
syst
emC
LB10
00T
CLB
1560
TC
LB10
00TH
CLB
1560
TH
Ext
erna
l dim
ensi
ons
Fla
nge
plat
e
LM b
lock
LM r
ail
Long
-term
per
miss
ible
load
(kN
)
Shor
t-ter
m p
erm
issibl
e loa
d(k
N)
Verti
cal r
igid
ity (k
N/m
m)
Hei
ght
Wid
th
Thi
ckne
ss
Hol
e di
amet
er
(Bol
t use
d)
Long
itudi
nal p
itch
Wid
th p
itch
Wid
th
Leng
th
Cle
aran
ce
Hei
ght
Wid
th
Com
pres
sion
Ten
sion
Com
pres
sion
Ten
sion
Com
pres
sion
Ten
sion
H
WF
PL
WF
PS
TF
PL
TF
PS
DF
P
(BF
P)
PF
PL
PF
PS
PF
PS
1
PF
PS
2
W L G1
M1
W1
P0L
tP0L
P0A
S
tP0A
S
K tK
599
730
659
790
660
760
660
760
1270
1510
1270
1510
5060
8595
5060
7585
3033
3033
(M27
)(M
30)
(M27
)(M
30)
150
200
150
200
520
620
520
620
270
320
270
320
305
375
270
320
465
560
465
560
584
722
584
722
145
190
145
190
9812
098
120
180
230
180
230
9800
1530
098
0015
300
00
00
1961
030
590
1961
030
590
940
1380
3550
4340
1200
015
300
1200
015
300
1080
1100
1110
1150
2380
1770
2620
1870
2380
1770
2620
1870
6560
110
135
6560
110
135
2480
1870
2720
1970
2480
1870
2720
1970
4011
060
8540
110
6085
2580
1970
2820
2070
2580
1970
2820
2070
9085
110
135
9085
110
135
2680
2070
2920
2170
2680
2070
2920
2170
6560
6085
6560
6085
2780
2170
3020
2270
2780
2170
3020
2270
4010
110
135
4010
110
135
Upp
erLo
wer
Upp
erLo
wer
Upp
erLo
wer
Upp
erLo
wer
Limit
defor
matio
nδs
t
550
600
650
700
750
CLB
1000
TC
LB15
60T
CLB
1000
TH
CLB
1560
TH
3464
5853
4331
6947
3580
6025
4490
7169
3695
6197
4648
7392
3811
6370
4807
7614
3927
6542
4965
7837
Un
it :
mm
Te
nsi
on
se
tS
tan
da
rd s
et
Up
per
:Fl
ang
e p
late
leng
th L
FPL,
LFP
S(m
m)
Mid
dle
:Fl
ange
pla
te m
ount
ing
hole
out
er e
dge
dist
ance
g (m
m)
Low
er:
Pro
duc
t mas
s (k
g)
Lim
it d
efor
mat
ion:
dim
ensi
on a
t w
hich
tra
vel
from
the
neut
ral p
ositi
on is
pos
sib
leF
or
limit
de
form
ati
on
s o
the
r th
an
th
e t
ab
le a
bo
ve,
cont
act T
HK
.
technical book
12
Linear Rotary Bearing CLB # TypeThe reference value of rolling friction coefficient and the upper limit of variations from the reference valueThe reference value of rolling friction coefficient of Linear Rotary Bearing CLB and the upper limit of variations fromthe reference value are obtained from the following equations.
Direction Model number Rolling friction coefficient Upper limit of variations from µ
Compression
Tension
µ=(1.2+3.6×P/P0L)/1000
µ=(1.2+5.0×tP/tP0L)/1000
2000F~3120F
2000FH~3120FHµmax=µ+0.002
Friction coefficient (×0.001)
Compressive load ratio P/P0
* P and tP are loads applied on thebearing.
Item Accuracy standard
The reference value, definition and measurement method of the accuracy after the installationAfter installing the system, mount anchor plate and other devices so that the following definitions and accuracystandards are met.
Afte
rins
talla
tion Block displacement
Rail tilt angle θX
Rail crosswise tilt angle θY
Rail twist angle θZ
Installation level difference Δh
±5 mm or belowθX≦1/500 radθY≦1/500 radθZ≦1/500 radΔh≦±0.01H and Δh≦1.5mm
│(RL1-RL2)│/2θX=│(h1+h3)-(h2+h4)│/(FB1×2)θY=│(h1+h2)-(h3+h4)│/(FB2×2)θZ=│d1-d2│/L
─
Reference value
Upper limit ofvariations
A-A’ arrow view B-B’ arrow view Plane view
13
Dim
en
sio
na
l ta
ble
La
nd, T
rans
por
t and
Infr
astr
uctu
re M
inst
er A
pp
rova
l No.
: M
VB
R-0
270,
027
1, 0
272
Mod
el n
umbe
r of
the
syst
emC
LB20
00F
CLB
3120
FC
LB20
00F
HC
LB31
20F
H
Ext
erna
l dim
ensi
ons
Fla
nge
plat
e
LM b
lock
LM r
ail
Long
-term
per
miss
ible
load
(kN
)
Shor
t-ter
m p
erm
issibl
e loa
d(k
N)
Verti
cal r
igid
ity (k
N/m
m)
Hei
ght
Wid
th
Thi
ckne
ss
Hol
e di
amet
er
(Bol
t use
d)
Long
itudi
nal p
itch
Wid
th p
itch
Wid
th
Leng
th
Cle
aran
ce
Hei
ght
Wid
th
Com
pres
sion
Ten
sion
Com
pres
sion
Ten
sion
Com
pres
sion
Ten
sion
H WF
P
TF
P
DF
P
(BF
P)
PF
PL
PF
PS
1
PF
PS
2
W L G1
M1
W1
P0L
tP0L
P0A
S
tP0A
S
K tK
599
730
669
800
1270
1510
1270
1510
5060
8595
3033
3033
(M27
)(M
30)
(M27
)(M
30)
150
200
150
200
270
320
270
320
305
375
270
320
465
560
465
560
584
722
584
722
145
190
145
190
9812
098
120
180
230
180
230
1961
030
590
1961
030
590
00
00
3922
061
190
3922
061
190
1880
2760
7100
8680
2400
030
600
2400
030
600
1980
2040
2220
2300
Un
it :
mm
Te
nsi
on
se
tS
tan
da
rd s
et
Limit
defor
matio
nδs
t
550
600
650
700
750
CLB
2000
FC
LB31
20F
CLB
2000
FH
CLB
3120
FH
2380
2620
2380
2620
6511
065
110
5999
1064
776
4912
890
2480
2720
2480
2720
4060
4060
6152
1087
678
7213
201
2580
2820
2580
2820
9011
090
110
6305
1110
680
9413
513
2680
2920
2680
2920
6560
6560
6458
1133
583
1613
825
2780
3020
2780
3020
4011
040
110
6611
1156
485
3914
137
Up
per
:Fl
ang
e p
late
leng
th L
FP(m
m)
Mid
dle
:Fl
ange
pla
te m
ount
ing
hole
out
er e
dge
dist
ance
g (m
m)
Low
er:
Pro
duc
t mas
s (k
g)
Lim
it d
efor
mat
ion:
dim
ensi
on a
t w
hich
tra
vel
from
the
neut
ral p
ositi
on is
pos
sib
leF
or
limit
de
form
ati
on
s o
the
r th
an
th
e t
ab
le a
bo
ve,
cont
act T
HK
.
technical book
14
Item Direction Accuracy standard
Viscous Damping System RDT
The reference value of the resistance (damping force)
Calculation of the resistance (damping force)The reference value of the resistance (damping force) of viscousdamping system RDT is obtained from the following equation.Pn =1.16・(α・QV+2.2)...(reference equation)
Legends:Pn: Resistance (kN)a: Repetitive dependence coefficientQv: Viscous resistance (kN) Qv=S・η(Vs,t)・Vs・AS: Amplification factor S=π・Dn/LdDn: Outer diameter of inner tube (m) Ld: Lead (m)h(Vs, t): Apparent viscosity η(Vs,t)=ηt/(1+bVsβ)×10-6
b=0.000472・ηt0.276 β=0.308・ηt0.081
ht: Vs= Dynamic viscosity in low-speed constant region with viscous body temperatureat t℃ (cSt) ηt=1.02(25-t)η25
h25: Vs = Dynamic viscosity in low-speed constant region with viscous body temperatureat 25℃ (cSt)
Vs: Shearing strain rate (sec-1) Vs=S・Vn/dyVn: Axial velocity (m/sec) dy: Shearing clearance (m)A: Shearing effective area (m2) A=Dn・π・LeLe: Effective length (m)
RDT05S 2.7 3.1 3.4 4.0 4.4 4.7 4.9 5.0 5.2
RDT1S 3.0 4.2 5.1 6.6 7.8 8.6 9.2 9.7 10.1
RDT2S 3.5 6.1 8.2 11.6 14.6 16.5 17.9 19.0 19.9
RDT4S 4.8 10.6 15.0 22.4 28.8 32.8 35.7 38.0 39.9
RDT6S 6.1 15.0 21.8 33.3 43.1 49.2 53.7 57.3 60.2
RDT8S 7.3 19.3 28.5 43.9 57.2 65.4 71.5 76.3 80.2
When calculated Repetitive dependence coefficient (α) Temperature (t)Reference value 0.85 20°CMaximum damping force 1.00 0°C
Full resistanceforce Pn
Inertial resistanceforce Qi
Resistance force
Frictional resistanceforce Qf
Viscous resistanceforce Qv
Displacement
Axial damping force (kN)
Axial velocity (m/sec)
Axial damping force (kN)
Displacement (mm)
: Calculated value : Experiment value
Reference value of resistance (damping force)
Modelnumber of
system
The reference value of the accuracy after the installation
After installing the system, mount anchor plate and otherdevices so that the following accuracy standards are met.
Axial velocity Vn m/sec (α= 0.85, t =20±°C)
0.01 0.05 0.10 0.25 0.50 0.75 1.00 1.25 1.50
Axial damping force (kN)
After
instal
lation Ball screw shaft neutral displacement ――― ±20 mm or below
Level angle Elevation θlv≦1/200 radRun-out angle Plane θca≦1/100 rad
Ball screw neutral displacement
Level angle (elevation)
RDT1S
Axial velocity-axial damping force performance diagram
All resistance force components
Level angle (plane)
15
Dim
en
sio
na
l ta
ble
fo
r R
DT
- s
ho
rt t
ype
La
nd, T
rans
por
t and
Infr
astr
uctu
re M
inst
er A
pp
rova
l No.
: M
VB
R-0
220
*1: L
imit
def
orm
atio
n =
dim
ensi
on a
t whi
ch tr
avel
from
the
neut
ral p
ositi
on is
pos
sib
le*2
: Rep
etiti
ve d
epen
den
ce c
oeffi
cien
t α=
1.0
whe
n th
e te
mp
erat
ure
is 0
°C*3
: Rep
etiti
ve d
epen
den
ce c
oeffi
cien
t α=
0.8
5 w
hen
the
spee
d is
0.0
1 to
1.5
0 m
/sec
at t
emp
erat
ure
20°C
*4: S
pec
ify C
eq s
o th
at th
e w
ork
amou
nt Δ
W o
f the
axi
al fo
rce
thro
ugho
ut o
ne c
ycle
is e
qua
l to
the
area
of t
he e
llip
se.
-50
0-
650
-50
0-
650
-50
0-
650
-50
0-
650
-50
0-
650
-50
0-
650
732
882
801
951
935
1085
1052
1202
1202
1352
1317
1467
1262
1562
1331
1631
1465
1765
1582
1882
1732
2032
1847
2147
941
1241
885
1185
773
1073
671
971
521
821
416
716
500
650
500
650
500
650
500
650
500
650
500
650
1112
1718
3335
6163
7880
9699
202
271
405
522
672
787
182
247
337
488
638
752
2025
3236
3640
2025
3236
3640
9810
812
415
015
015
6M
5M
6M
6M
8M
8M
84
44
44
4(5
2)(5
2)(5
2)(6
3)(8
7)(8
7)
1.50
1.50
1.50
1.50
1.50
1.50
5.9
12.3
25.0
50.7
77.0
102.
92.
7~5.
23.
0~10
.13.
5~19
.94.
8~39
.96.
1~60
.27.
3~80
.234
1.4~
4.2
371.
2~8.
042
5.1~
15.6
556.
0~31
.268
2.2~
47.0
803.
9~62
.6
RD
T05
SR
DT
1SR
DT
2SR
DT
4SR
DT
6SR
DT
8S
L
Lmax
Lmin
L1 L0 D Ld D0
M Q MB
δst
Vm
ax
Fm
ax F
Ceq -
mm
mm
mm
mm
mm
mm
mm
mm - - mm
mm
m/s
ec
kN kN
kN・s
ec/m
kg
Mo
de
l nu
mb
er
of
syst
em
Ove
rall
syst
em le
ngth
Max
imum
ext
ensi
on
Min
imum
com
pres
sive
leng
th
Mai
n un
it le
ngth
Max
imum
pro
trus
ion
leng
th
Scr
ew s
haft
diam
eter
Lead
Out
er tu
be d
iam
eter
Mou
ntin
g bo
lt
Buf
fer
heig
ht
Lim
it de
form
atio
n*1
Lim
it sp
eed
Max
imum
res
ista
nce
*2
Res
ista
nce
forc
e*3
Equiv
alent
visco
sity d
ampin
g coe
fficien
t*3
*4
Mas
s
Desig
natio
n
Qua
ntity
technical book
16
Dim
ensi
onal
tab
le f
or R
DT
– 1
00,0
00 c
St
type
Lan
d, T
rans
port
and
Infra
stru
ctur
e M
inst
er A
ppro
val N
o. :
MVB
R-0
221
Mo
de
l nu
mb
er
of
syst
em
RD
T2
RD
T4
RD
T6
RD
T8
RD
T10
RD
T12
RD
T14
RD
T16
RD
T18
RD
T20
Ove
rall
syst
em le
ngth
Max
imum
ext
ensi
on
Minim
um co
mpre
ssive
leng
th
Mai
n un
it le
ngth
Max
imum
pro
trusio
n len
gth
Scr
ew s
haft
diam
eter
Lead
Out
er tu
be d
iam
eter
Mou
ntin
g bo
lt
Buf
fer
heig
ht
Lim
it de
form
atio
n*1
Lim
it sp
eed
Max
imum
resis
tanc
e*2
Res
ista
nce
forc
e*3
Equivale
nt visco
sity dam
ping coe
fficient
*3 *4
Mas
s
L
Lmax
Lmin
L1 L0 D Ld D0
M Q MB
δst
Vm
ax
Fm
ax F
Ceq -
mm
mm
mm
mm
mm
mm
mm
mm - - mm
mm
m/s
ec
kN kN
kN・s
ec/m
kg
-50
0-
650-
500-
650-
500-
650-
500-
650-
500-
650-
500-
650-
500-
650-
500-
650-
500-
650-
500-
650
962
1112
1152
1302
1327
1477
1354
1504
1446
1596
1551
1701
1656
1806
1756
1906
1861
2011
1966
2116
1492
1792
1682
1982
1857
2157
1884
2184
1976
2276
2081
2381
2186
2486
2286
2586
2391
2691
2496
2796
745
1045
572
872
397
697
381
681
329
629
224
524
119
419
1931
9-
214
-10
9
4345
7678
9698
115
118
192
196
203
207
214
218
225
229
236
240
247
251
500650500650500650500650500650500650500650500650500650500650
Desig
natio
n
Qua
ntity
432
622
797
824
916
1021
1126
1226
1331
1436
397
581
756
780
857
962
1067
1167
1272
1377
3236
3640
5050
5050
5050
3236
3640
5050
5050
5050
132
150
150
165
202
202
202
202
202
202
M6
M8
M8
M8
M14
M14
M14
M14
M14
M14
44
44
44
44
44
(63)
(63)
(87)
(87)
(117
)(1
17)
(117
)(1
17)
(117
)(1
17)
1.50
1.
50
1.50
1.
50
1.50
1.
50
1.50
1.
50
1.50
1.
50
25.1
51
.1
77.2
10
2.8
128.
8 15
5.0
181.
2 20
6.1
232.
3 25
8.5
3.7~
19.9
4.8~
39.9
5.9~
59.9
7.2~
79.9
8.4~
99.9
9.5~
120.
110
.7~
140.
311
.8~
159.
612
.9~
179.
814
.1~
200.
044
9.6~
15.7
560.
0~31
.167
1.0~
46.7
803.
2~62
.292
1.1~
77.8
1039
.1~93
.411
57.0~
109.1
1269
.4~12
4.013
87.4~
139.7
1505
.3~15
5.4
*1: L
imit
def
orm
atio
n =
dim
ensi
on a
t whi
ch tr
avel
from
the
neut
ral p
ositi
on is
pos
sib
le*2
: Rep
etiti
ve d
epen
den
ce c
oeffi
cien
t α=
1.0
whe
n th
e te
mp
erat
ure
is 0
°C*3
: Rep
etiti
ve d
epen
den
ce c
oeffi
cien
t α=
0.8
5 w
hen
the
spee
d is
0.0
1 to
1.5
0 m
/sec
at t
emp
erat
ure
20°C
*4: S
pec
ify C
eq s
o th
at th
e w
ork
amou
nt Δ
W o
f the
axi
al fo
rce
thro
ugho
ut o
ne c
ycle
is e
qua
l to
the
area
of t
he e
llip
se.
17
Dim
ensi
onal
tab
le f
or R
DT
– 3
00,0
00 c
St
type
Lan
d, T
rans
port
and
Infra
stru
ctur
e M
inst
er A
ppro
val N
o. :
MVB
R-0
222
Mo
de
l nu
mb
er
of
syst
em
RD
T30
RD
T40
RD
T50
RD
T60
RD
T70
RD
T80
RD
T90
RD
T10
0R
DT
125
RD
T14
0
Ove
rall
syst
em le
ngth
Max
imum
ext
ensi
on
Minim
um co
mpre
ssive
leng
th
Mai
n un
it le
ngth
Max
imum
pro
trusio
n len
gth
Scr
ew s
haft
diam
eter
Lead
Outer
tube
diam
eter
Mou
ntin
g bo
lt
Buf
fer
heig
ht
Lim
it de
form
atio
n*1
Lim
it sp
eed
Max
imum
resis
tanc
e*2
Res
ista
nce
forc
e*3
Equivale
nt visco
sity dam
ping coe
fficient
*3 *4
Mas
s
L
Lmax
Lmin
L1 L0 D Ld D1
D3 M Q MB
δst
Vm
ax
Fm
ax F
Ceq -
mm
mm
mm
mm
mm
mm
mm
mm
mm - - mm
mm
m/s
ec
kN kN
kN・s
ec/m
kg
-75
0-1
000-
750-1
000-
750-1
000-
750-1
000-
750-1
000-
750-1
000-
750-1
000-
750-1
000-
750-1
000-
750-1
000
1990
2240
2160
2410
2330
2580
2500
2750
2671
2921
2816
3066
2961
3211
3106
3356
2890
3140
3386
3636
2770
3270
2940
3440
3110
3610
3280
3780
3451
3951
3596
4096
3741
4241
3886
4386
3670
4170
4166
4666
757
1257
587
1087
417
917
247
747
104
604
-45
9-
314
-16
9-
401
--
750
1000
750
1000
750
1000
750
1000
750
1000
750
1000
750
1000
750
1000
750
1000
750
1000
629
649
687
707
745
765
803
823
1009
1040
1075
1106
1141
1172
1208
1239
1522
1563
1925
1981
Am
plifi
catio
nse
ctio
n
Atte
nuat
ion
sect
ion
Desig
natio
n
Qua
ntity
1210
1380
1550
1720
1891
2036
2181
2326
2110
2606
1136
1306
1476
1646
1801
1946
2091
2236
2007
2503
8080
8080
100
100
100
100
120
140
4040
4040
5050
5050
6070
267
267
267
267
312
312
312
312
317
332
267
267
267
267
312
312
312
312
392
392
M16
M16
M16
M16
M20
M20
M20
M20
M24
M24
88
88
1010
1010
1010
(117
)(1
17)
(117
)(1
17)
(119
)(1
19)
(119
)(1
19)
(127
)(1
27)
1.50
1.
50
1.50
1.
50
1.50
1.
50
1.50
1.
50
1.50
1.
50
365.
0 48
9.0
612.
0 73
6.0
861.
0 98
4.0
1107
.0
1230
.0
1533
.0
1728
.0
56~
229
73~
399
89~
500
106~
600
122~
701
138~
801
153~
901
169~
1001
219~
1250
225~
1402
6088~
241
7821~
322
9554~
403
1128
7~48
413
042~
566
1468
9~64
616
336~
726
1798
3~80
723
275~
1009
2377
7~11
30
*1: L
imit
def
orm
atio
n =
dim
ensi
on a
t whi
ch tr
avel
from
the
neut
ral p
ositi
on is
pos
sib
le*2
: Rep
etiti
ve d
epen
den
ce c
oeffi
cien
t α=
1.0
whe
n th
e te
mp
erat
ure
is 0
°C*3
: Rep
etiti
ve d
epen
den
ce c
oeffi
cien
t α=
0.8
5 w
hen
the
spee
d is
0.0
1 to
1.5
0 m
/sec
at t
emp
erat
ure
20°C
*4: S
pec
ify C
eq s
o th
at th
e w
ork
amou
nt Δ
W o
f the
axi
al fo
rce
thro
ugho
ut o
ne c
ycle
is e
qua
l to
the
area
of t
he e
llip
se.
technical book
18
Case Examples of Design
This is an irregularly shaped wooden house inwhich one of the corners is cut and the center ofone side is recessed. Since THK’s base isolationsystem provides support, damping and recovery indifferent places, it can base-isolate even such anirregularly shaped wooden house.
Characteristics
Base isolation systemsCLB011-400 : 5unitsCLB017-400 : 5unitsHDR-200 : 5unitsRDT2-400 : 4units
Building overviewBase-isolated area : 107.1m2
1st floor : 94.8m2
2nd floor : 97.9m2
Loft : 30.6m2
This is a steel-framed house in which agarage is built in part of the 1st floor.Since THK’s base isolation system hasa very small friction coefficient, it canbase-isolate even a building with loadfluctuations like this house.
Characteristics
Base isolation systemsCLB017-400 : 4unitsCLB021-400 : 8unitsHDR-200 : 8unitsRDT2-400 : 4units
Building overviewBase-isolated area : 94.7m2
1st floor : 90.9m2
2nd floor : 75.8m2
3rd floor : 66.7m2
19
Information on THK’s structural calculation system responding to base isolation notification
Our website shows a system with a function to perform structural calculation of base-isolated buildingsresponding to Construction Ministry Notification No. 2009 (compliant with the content of its revision in 2004).The result of calculation can be printed. You can use it as a structural calculation sheet.Address of the structural calculation system website: http://www.menshin.net/thkuser/index.htm
- Automatic selection of an optimal base isolationsystem model through specif ication of adesired cycle and response displacement
- Automatic calculation of Ai distribution factor- Supports wind load and snow load- Arbitrary temperature correction- Detail output of calculation process
- Damping system placement at any position- Outputting a resilience characteristic diagram
of the base isolation layer- Outputting a working load/distortion relation
diagram of a base isolation system- Outputting a system layout drawing and an
eccentricity/rigidity center position diagram
System overview
How to use the system1. Register as a user on the top page (free).
After registration, a password is sent to theregistered mail address.
2. Enter the user ID (registered mail address) andthe password distributed by mail in the loginscreen to log in. You can also change your password in the loginscreen.
3. an overview of the building and data on theground (simplified calculation is also available).
4. Select a system, or enter the desired cycle andresponse displacement, and then determine thelayout of the recovery system. Calculation isautomatically started.
Screen of the result of automatic calculation after data entry
Login screen
technical book
Precautions on Use●Precautions on handing (observe the following points to avoid danger)
• Tilting CLB with the temporary clamps removed may cause the LM block or LM rail to slide by their own weights, anddamage it or fall onto the foot to cause injury. During transportation or in any process where the product may betilted in installation, do not remove the temporary clamps.
• Dropping or hitting the product may damage it. Giving impact to the product could lose its function even if it looksintact.
• Disassembling the product may cause dust to enter the product or degrade the assembly accuracy of parts, whichcould make the product unable to maintain its original performance. Do not disassemble the product.
• When transporting RDT, holding the ball screw may damage it. Be sure to hold RDT itself when transporting it.- Leaning down the buffer of RDT from the horizontal position may let air enter it and make RDT unable to maintain its
original performance.
●Lubrication • Do not wipe off the grease applied on the product.• The system contains AFA Grease (THK product), with which we have applied for acquisition of Land, Transport and
Infrastructure Minster approval for the system. When replenishing grease during installation or periodical inspection,do not replenish other grease.
●Precautions on use• When installing the system, take care not to contaminate the system with rain, dirt or dust as much as possible, and
cure the system after it is installed. In addition, remove the curing equipment before the construction of the building.• Take a measure to prevent the base isolation layer from being immersed from rain during the installation work.• CLB is provided with temporary clamps for preventing fall during transportation and positioning the system when
installing steel frames. Remove them before the construction of the building.
20070302 Printed in Japan
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All rights reserved.
●“LM Guide” are the registered trademarks of THK Co., Ltd.●The photo may differ slightly in appearance from the actual product.●The appearance and specifications of the product are subject to change without notice. Contact THK before placing an order.●Although great care has been taken in the production of this catalog, THK will not take any responsibility for damage resulting from typographical errors or
omissions.●For the export of our products or technologies and for the sale for exports, THK in principle complies with the foreign exchange law and the Foreign
Exchange and Foreign Trade Control Law as well as other relevant laws.For export of THK products as single items, contact THK in advance.