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.

pd