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European Journal of Business &

Social Sciences

Available at https://ejbss.org/

ISSN: 2235-767X

Volume 07 Issue 05

May 2019

Available online: https://ejbss.org/ P a g e | 947

Experimental Study on Battened Column with

Different Connections under Axial Compression

Muthuramalingam. J, PG Student

Dept. of Civil Engineering

PRIST University

Thanjavur-403, India

muthuramalingam96@gmail.com

Abstract — The use of cold-formed steel members has

increased in recent years, especially in light-weight steel

construction, such as steel-framed housing, low-rise office

buildings, factories, and warehouses due to its high

strength to weight ratio. Cold formed steel built-up

sections are commonly used as compression members to

carry heavier loads and over longer spans when a single

individual section is insufficient. The mono symmetric

sections have relatively small torsional rigidity that is weak

in twisting compared to doubly symmetric sections. In this

study, the cold-formed steel built-up closed sections with

web stiffeners are investigated.

The direct strength method is based on open sections,

such as the simple lipped channel, lipped channel with web

stiffeners, Zsection, hat section, and rack upright section.

Therefore, there is a need to investigate the

appropriateness of the direct strength method on the type

of cold-formed steel built-up battened sections.

The purpose of this paper is to study the behaviour and

strength of the cold-formed steel builtup battened columns

by Numerical and theoretical analysis. A non-linear finite

element model was developed for cold formed steel built

up columns. The models account for steel plasticity,

geometric non-linearities, and geometrical imperfections.

The models were verified using experimental results in the

literature (El Aghoury et al. (2012)), and used in a

parametric study. In the parametric study the slenderness

ratio is varied from 30 to 120 for the selected three

sections. The strength obtained from the numerical

analysis are compared with the design strengths obtained

using the direct strength method in the North American

Specification (NAS 2007) and Australian/New Zealand

Standard (AS/NZS 2005) for cold-formed steel structures.

In the calculation of the direct strength method, local

buckling stress and distortional buckling stress are

required. In this study, two different methods were used to

obtain these stresses. The appropriateness of the direct

strength method on the cold-formed steel built-up

battened columns was investigated. A design

recommendation is proposed for DSM to evaluate ultimate

strength of the lipped channel built-up battened columns.

Furthermore, the advantages and limitations of the

proposed design rules are also discussed.

Index Terms— Battened Column, Compression

members

I. INTRODUCTION

Steel products are extensively used in building industries,

such as bridges, roof trusses, transmission line towers, multi- storied buildings etc., because of its high strength, resulting in

the reduction of dead weight. There are two main families of

steel structural members. One is the familiar group of hot- rolled member and the less familiar but of growing importance,

i.e., cold-formed steel depends on the manufacturing. The

thickness of cold formed steel sheets or strip are generally

ranges from 0.4 mm to about 6.4 mm. Normally, the yield

strength of steel sheets used in cold-formed sections is at least

280 N/mm2, although there is a trend to use steels of higher

strengths, and sometimes as low as 230 N/mm2

The use of hot-rolled steel sections become uneconomical

for the steel structures subjected to light and moderate loads

and for the structural members of short span lengths (e.g.,

joists, purlins, girts, roof trusses, complete framing of one and

two storey residential, commercial and industrial structures).

So, cold formed steel sections have gained considerable

prominence over hot rolled-sections. The cold formed steel can

be used to make almost any shape by the following three

methods.

1 Cold roll forming

2 Press brake operation

3 Bending brake operation

The cold-formed steel sections are mainly used in car

bodies, railway coaches, various types of equipment, storage

racks, grain bins, highway products, transmission towers,

transmission poles, drainage facilities, and bridge

constructions.