7/29/2019 Introduction to Timber Engineering & Limit
States
1/4
Ijeturj 0 ( Uuhh`ry p`nj 0
Ijeturj 0 Lgtrfkuetlfg tf tlhcjr jgnlgjjrlgn $ ilhlt st`tjs
kjslng
Lgtrfkuetlfg tf tlhcjr strueturjs
Dfrh fd tlhcjr strueturjs
Gfhjgei`turj fd hjhcjrs lg tlhcjr strueturjs Ilhlt st`tjs
suhh`ry ( sjrvlej`clilty) st`clilty) strjgnta
Utrjgnta ilhlt st`tj kjslng jqu`tlfg
E`p`elty d`etfrs
Ijeturj Uuhh`ry
@lhs fd [lhcjr Jgnlgjjrlgn Ujnhjgt
@t taj efhpijtlfg fd taj efursj) p`rtlelp`gts safuik a`vj?
`g `pprjel`tlfg fd taj pftjgtl`i fd tlhcjr jgnlgjjrlgn
strueturjs
`g `pprjel`tlfg fd taj typjs fd hjhcjrs lg walea tlhcjr ls
usjk
` sfugk ugkjrst`gklgn fd taj cja`vlfur fd tlhcjr lg struetur`i
jijhjgts
`clilty tf e`ieui`tj taj e`p`elty fd tjgslfg) efhprjsslfg `gk
cjgklgn hjhcjrs
`g `pprjel`tlfg fd taj lhpfrt`gt d`etfrs tf cj efgslkjrjk lg taj
kjslng fd tlhcjr efggjetlfgs
`clilty tf dlgk taj e`p`elty fd slhpij efggjetlfgs
Jgvlrfghjgt`i Efgslkjr`tlfgs dfr [lhcjr Utrueturjs
Utruetur`i tlhcjr ls sfurejk drfh h`g`njk g`tlvj dfrjsts `gk
pi`gt`tlfgs'
H`g`njk g`tlvj dfrjsts ( ifnnjk tf hlglhlsj lhp`et fg g`tlvj
difr` `gk d`ug`
( rjnjgjr`tlfg r`tjs pi`ggjk tf jxejjk ifnnlgn r`tjs
]i`gt`tlfg dfrjsts ( spjeldle`iiy pi`gtjk `gk d`rhjk trjjs dfr
tlhcjr
H`g`njk dfrjsts dugetlfg `s e`rcfg klfxlkj slgbs'
r`plkiy nrfwlgn trjjs dlx e`rcfg lg taj wffk
e`rcfg jxpfrtjk drfh dfrjst lg taj tlhcjr
ifw prfkuetlfg jgjrny ( hfrj e`rcfg stfrjk lg wffk ta`g rjij`sjk
kurlgn prfkuetlfg
e`rcfg stfrjk lg struetur`i jijhjgts
Jgjrny rjqulrjk `gk e`rcfg jqulv`ijgts dfr cj`hs `gk
ei`kklgns
Ilnat
cj`h
!0 hjtrj, Aj`vy
cj`h
!0 hjtrj, sajjtlgn !0 h
Utjji3==&0': ;='= 5>'= ;'> 4'=
]rfkg jgjrny !HO, 55= 01 354= 555 0>5 005
E`rcfg rjij`sjk !bn, 4'= ='5 ;3'1 :'< 5'3 3'0
E`rcfg stfrjk !bn, = 5'1 = 01': = 5'=
gjt E`rcfg !bn, 4'= (5'; ;3'1 (03'4 5'3 (='='0 3'37`gk w`gt S ]
/ !Sjkuejk E`p`elty jxejjks d`etfrjk if`k jddjet,
E`p`elty D`etfr ]rlh`ry jijhjgts lg strueturjs wlta spjel`i
pfst(kls`stjr dugetlfgs'
strueturj a`s pfst(kls`stjr lhpfrt`gej
@GK
gf p`r`iiji jijhjgts tf sa`rj if`k M d`liurj) FS d`liurj fd taj
jijhjgt
h`y e`usj efii`psj fd ` slngldle`gt p`rt fd taj strueturj'
]rlh`ry jijhjgts lg gfrh`i strueturjs'
strueturj ls gft ` afusj strueturj `gk a`s gf pfst(kls`stjr
lhpfrt`gej
@GK gf p`r`iiji jijhjgts tf sa`rj if`k M d`liurj) FS d`liurj fd
taj jijhjgt
h`y e`usj efii`psj fd ` slngldle`gt p`rt fd taj strueturj'
UfiutlfgUfiutlfg
!efhpijtjk ofc,
]rfcijh!
Kjdlgltlfg fd prfcijh!Kjslng crljd, Lgdfrh`tlfg sj`rea
]rjilhlg`ry kjslngs gk sjijetlfg
Kjt`lijk kjslng
Kr`wlgns gk spjeldle`tlfgs
Lgeiukjs? sjttlgn erltjrl`) efgstr`lgtsdugetlfg`i `gk struetur`i
rjqulrjhjgts
Lgeiukjs? kjslng k`t`)lgdfrh`tlfg drfh ftajrefgsuit`gts)
if`ks
Lgeiukjs? typj fd systjh)sp`elgn fd h`ofr hjhcjrs)dlxlty fd
efggjetlfgs
efgstruetlfg tjeaglqujs
Utruetur`i systjhs!Efgejptu`i kjslng,
@kvlej fg efgstruetlfg
7/29/2019 Introduction to Timber Engineering & Limit
States
4/4
Ijeturj 0 ( Uuhh`ry p`nj ;
Ujefgk`ry jijhjgts lg `ii strueturjs'
slhli`r p`r`iiji jijhjgts e`g sa`rj if`k M d`liurj
@GK d`liurj fd taj jijhjgt wlii gft e`usj efii`psj fd `
slngldle`gt p`rt fd taj
strueturj'
Afuslgn jijhjgts
lgeiukjs `ii struetur`i jijhjgts lg afusjs'
Nr`klgn Hjtafk
Jhpa`sls ls fg prfpjrtljs usjk dfr kjslng' [aj prfpjrtljs `rj
`sslngjk fg taj c`sls fd taj nr`kj
`w`rkjk tf taj tlhcjr cy taj prfkuejr' [aj nr`kj `gk taj nr`klgn
hjtafk wlii cj p`rt fd taj
spjeldle`tlfg ta`t ` kjslngjr wlii kjvjifp dfr taj kjt`lijk
hjhcjr `t taj efhpijtlfg fd taj kjslng' !Lg
`ii cut D(nr`kjk tlhcjr) taj nr`klgn hjtafk ls lhpiljk cy taj
nr`kj,' @g @ustr`il`g Ut`gk`rk guhcjr
ls lgeiukjk dfr j`ea nr`klgn hjtafk lg 9[`cij 3':7 `gk taj s`hj
guhcjr ls lgeiukjk lg taj nr`kj
st`hp fg taj tlhcjr'
E`p`elty d`etfrs dfr struetur`i tlhcjr
[lhcjr prfkuet
nr`klgn `gk h`rb
Utrjgnta
prfpjrtljs
Ujefgk`ry
jijhjgts&`ii
jijhjgts lg
afusjs
]rlh`ry
jijhjgts)
gfrh`i
strueturjs
]rlh`ry
jijhjgts)
lhpfrt`gt
strueturjs
[lhcjr hjhcjrs
Zgsurj fd nr`klgn d .cd .ed .td .s
d .pd .id .sod .tp
='1=
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='4:
='4=
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Tlsu`iiy(nr`kjk
@U3=13 fr @U31:1
d .cd .ed .td .s
d .pd .id .sod .tp
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H`ealgj(nr`kjk
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d .c
d .ed .td .sd .pd .id .sod .tp
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d .cd .ed .td .s
d .pd .id .sod .tp
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]rffd(nr`kjk
@U5:0=
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]iywffk
@U&G_U334
prfpjrtljs drfh h.drprfpjrtljs drfh efkj
d .cd .ed .td .s
d .pd .id .sod .tp
d .pd .id .sod .tp
=': ='4: ='4=
K?YHy KfeuhjgtsY[lhcjrJkYSjsfurejsYLgtrfJgn pptYLgtrfJgn
Uuh0'kfe ngc 33 Oui ==
