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IJSRD - International Journal for Scientific Research & Development| Vol. 5, Issue 02, 2017 | ISSN (online): 2321-0613
All rights reserved by www.ijsrd.com 1258
Numerical Study of PEB Industrial Shed Truss under Influence of
Accidental Load using Staad Pro
Sapkale Nikhil P1 Dr. Kulkarni Sanjay K2
1Student 2Professor 1,2Dr. D.Y. Patil School of Engineering & Technology Charholi (Bk), Lohegaon, Pune - 412105, India
Abstract— Large Span, Column free structures are the most
vital in any type of industrial structures and Pre Engineered
Buildings (PEB) fulfills this requirement along with reducing
time and cost as compared to conventional Steel Building
(CSB). In the present work, Pre-Engineered Buildings (PEB)
and Conventional Steel Building is compared and PEB
designed. This structure to design according to IS: 800 - 2007
and accidental load analysis done according to IS: 875 - 1987
(Part-I, Part-II, Part-III). A major portion of the analysis is
carried out in Bentley STAAD. PRO V8i.
Key words: Pre-Engineered Building, Conventional Steel
Structure, STAAD PRO Software
I. INTRODUCTION
A. General
Steel industry is growing speedily in almost all the parts of
the world. The use of steel structures is not only economical
but also ecofriendly at the time when there is a danger of
global warming. Here, “economical “word is means
considering time and cost. Time being the most important
aspect, steel structures (Pre-fabricated) is built in very short
period and one such example is Pre Engineered Buildings
(PEB). Pre-engineered buildings are nothing but steel
buildings in which extra steel is avoided by tapering the
sections as per the bending moment’s requirement. If we go
for regular steel structures, time span will be more, and also
cost will be more, and both together i.e. time and cost, makes
it uneconomical.
B. Classification of Steel Buildings
1) Conventional Steel Buildings
Conventional Steel buildings are consultant and conservative.
The Structural members are hot rolled and are used in
conventional buildings. The materials are produced or
manufactured in the plant and are shifted to the site. The raw
materials are processed in the site for the desired form and
erected. The modifications can be done during erection by cut
and weld process. Truss systems are used in conventional
system.
2) Pre Engineered Steel Buildings
Pre Engineered Steel Buildings are manufactured or
Produced in the plant itself. The manufacturing of structural
members is done as per customer requirements. The detailed
structural members are designed for their respective location
and are numbered, which cannot be altered; because members
are manufactured with respect to design features. These
components are made in modular or completely knocked
condition for transportation. These materials are transported
to the customer site and are erected. Welding and cutting
process are not performed at the customer site. No
manufacturing process done at the customer site.
C. Applications of PEB
Applications of pre-engineered steel buildings include the
following:
Industrial Buildings & Workshops
Warehouses
Showrooms
Corporate Office Buildings
Schools
D. Components of PEB
1) Main Components
Primary or Main frame
Gable End framing or Wind columns
Secondary frame or Purlins, girts etc.
Roof & Wall Sheeting.
Bracing system.
Crane system.
Mezzanine system.
Insulations.
Attachments like canopies, fascia etc.
Doors, Windows, Ventilators.
Accessories like Turbo vents, Ridge Vents, Skylights etc.
E. Main Framing
Fig. 1: Typical PEB Steel structure
F. Aim and Objectives of PEB
1) Aim
The main aim is to study performance of pre-engineered
building of an industrial shed for a wind load in various
directions and accidental load in accordance with is 875 part
5.
2) Objective of Project
To validate model by comparing results of axial force
and deformation in STAAD-Pro
To check performance of PEB truss structure for
Accidental Loads.
To study performance analysis of PEB for multi span (3
bays, 9 bays etc.).
Numerical Study of PEB Industrial Shed Truss under Influence of Accidental Load using Staad Pro
(IJSRD/Vol. 5/Issue 02/2017/345)
All rights reserved by www.ijsrd.com 1259
G. Expected Outcomes
The output of this project will help construction manager to:
Understand the concept of PEB structure and the
advantages over conventional buildings.
Various aspects related to design and modelling of the
structure.
PEB building cost is 30-40% lesser than the cost of CSB
structure.
II. PROBLEM STATEMENT
Fig. 2: Intermediate Truss System---Type-A along Width
Fig. 3: Intermediate Truss System---Type-A along Width
Fig. 4: Application of accidental load
Fig. 5: Accidential load along + X direction of CST 3 bays
Fig. 6: Instability of joints of CST industrial sheds with 3
bays
Fig. 7: Torsional stresses in joints due to Accidental load
Fig. 8: Accidentals load CST industrial sheds with 9 bays
(each bay of 8m and span 12m)
Numerical Study of PEB Industrial Shed Truss under Influence of Accidental Load using Staad Pro
(IJSRD/Vol. 5/Issue 02/2017/345)
All rights reserved by www.ijsrd.com 1260
Fig. 9: Deflection due to Accidentals load CST industrial
sheds with 9 bays (each bay of 8m and span 12m)
Fig. 10: Steel Take-off quantity CST industrial sheds with 9
bays
Fig. 11: Instability of joints on CST with 9 bays
III. RESULT
Fig. 12: Maximum deformation of CST of 3-Bays and 9-
Bays
Fig. 13: Maximum Axial Force of CST of 3-Bays and 9-
Bays.
Fig. 14: Maximum deformation of PEB 3-Bays and 9-Bays
Fig. 15: Maximum Axial force of PEB 3-Bays and 9-Bays
Max. Deformation 3 bays( mm)
CST PEB
43.7 34.3
Max. Axial Force 3 bays kN
CST PEB
84.3 63.58
Max. Deformation 9 bays( mm)
CST PEB
39.6 23.7
Max. Axial Force 9 bays kN
CST PEB
76.7 57.23
Table 1: Deformation
Fig. 16: Maximum deformation of PEB, CST 3-Bays
Fig. 17: Maximum Axial Force of PEB, CST 3-Bays
Numerical Study of PEB Industrial Shed Truss under Influence of Accidental Load using Staad Pro
(IJSRD/Vol. 5/Issue 02/2017/345)
All rights reserved by www.ijsrd.com 1261
IV. CONCLUSION
For longer span structures, Conventional buildings are not
suitable with clear spans. Pre-engineered building are the best
solution for longer span structures without any interior
column in between as seen in this present work.
PEB structures are found to be costly as compared
to Conventional structures in case of smaller span structures.
In the present work, the weight of steel can be
reduced to 27% - 30% for the PEB, providing lesser dead load
which in turn offers higher resistance to various erection
loads.
In 3 bays and 9 bays comparison it is found that
longitudinal deformation is more in 3 bays as compared to 9
bays for accidental load PEB is more effective for long spans
than CST.
REFERENCES
[1] IS 875- Part II / III (1987), Indian Standard Code of
Practice for Design Loads (Other Than Earthquake) for
Buildings and Structures.
[2] Ms.Darshana P. Zoad (2012), “Evaluation of Pre-
Engineering Structure Design by IS-800 as against Pre-
Engineering Structure Design by AISC”, International
Journal of Engineering Research & Technology (IJERT),
Vol. 1, Issue 5.
[3] Syed Firoz, Sarath Chandra Kumar B,
S.KanakambaraRao,” Design Concept of Pre Engineered
Building”, IJERA Vol. 2, Issue 2,Mar- Apr 2012,
pp.267-272
http://www.ijera.com/papers/Vol2_issue2/AS22267272.
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