Behaviour of wrapped cold-formed steel columns under different loading conditions

International Conference on Civil Engineering and Infrastructural Issues in Emerging Economies 2017

土木建筑工程;经济学

Hari Baabu, B.^1 ; Sreenath, S.^1

School of Civil Engineering, SASTRA University, Thanjavur

613 401, India^1

关键词: Axial loading;    Channel sections;    Cold-formed members;    Cold-formed steel columns;    Eccentric loading;    GFRP laminates;    Glass fiber reinforced polymer laminates;    Ultimate load-carrying capacity;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/80/1/012025/pdf
DOI  :  10.1088/1755-1315/80/1/012025

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The use of Cold Formed Steel (CFS) sections as structural members is widely accepted because of its light nature. However, the load carrying capacity of these sections will be less compared to hot rolled sections. This study is meant to analyze the possibility of strengthening cold formed members by wrapping it with Glass Fiber Reinforced Polymer (GFRP) laminates. Light gauge steel columns of cross sectional dimensions 100mm x 50mm x 3.15mm were taken for this study. The effective length of the section is about 750mm. A total of 8 specimens including the control specimen is tested under axial and eccentric loading. The columns were tested keeping both ends hinged. For both loading cases the buckling behaviour, ultimate load carrying capacity and load-deflection characteristics of the CFS columns were analyzed. The GFRP laminates were wrapped on columns in three different ways such that wrapping the outer surface of web and flange throughout the length of specimen, wrapping the outer surface of web alone throughout the length of specimen and wrapping the outer surface of web and flange for the upper half length of the specimen where the buckling is expected. For both loading cases, the results indicated that the column with wrapping at the outer surface of web and flange throughout the length of specimen provides better strength for it.