Analysis and Design of Steel Structures Using Cold Framed Steel Sections

Abstract

Cold-Formed Steel sections are basically the light gauge steel sections which are formed by forming of strips and metal sheets into desired sizes and shapes to meet the given requirement.

This report gives basic idea to understand of the behaviour of cold formed sections as different to the conventional hot-rolled sections. Due to its thin wall nature it has to be limited to various stresses not to form pre-failure of the member due to local instabilities like torsional-flexural buckling & web crippling.

The report discusses the typical important provisions of the Indian Standard code of practice – IS 801 1975 - for cold-formed light gauge steel. Report covers basic Analysis & design procedure for various cold formed steel structural members like compression, flexure and tension member, purlin according to IS 801 1975 provisions.

Parametric study is done by developing a program in ‘C++’ language for calculation of section properties of all types of cold-formed steel sections given in IS 811, British, AISI & Canadian codes. Also axial compression load carrying capacity tables and moment carrying capacity tables have beeen prepared using program developed. An attempt has also been made to state and compare code provisions of other three countries viz: British, American and Canadian.

The aim of this study was to prepare “Design Aid” tables for cold-formed section, which can be directly used by professional engineers.

Also the brief manufacturing processes, methods of production, comparison with hot-rolled sections & advantages of using cold-formed sections forms are discussed in the early text of the report.