A Study on Cold-Formed Steel Compound Angle Section Subjected to Axial Compression

作者：Ananthi G Beulah Gnana^*

来源：KSCE Journal of Civil Engineering, 2018, 22(5): 1803-1815.

DOI：10.1007/s12205-017-1221-6

• built-up box angles
• thin-walled steel
• local buckling
• flexural buckling
• finite element method
• direct strength method

The objective of our work is to examine the compressive strength on pin-ended thin-walled steel built-up double angles placed as a box section. Four types of cross sections with two different thickness are chosen for this study. A total number of 16 columns both stub and short columns are tested till they reach their ultimate strength. The built-up box angle sections consist of two identical lipped angle sections oriented face to face and connected with self-drilling screws through the lips in a particular spacing along the entire length. By using the ABAQUS software, a numerical finite element is set up to validate initially by verifying the experimental data on the behavior of built-up box angles. The Finite Element Model (FEM) holds both the geometric and material non-linearities. A study of parameter is done following the confirmation of the FEM on columns with different slenderness ratios ranging between 20 to 120. The quantitative results showed that they agreed well with the data of the experiments. Comparison is made with the two experimental and the numerical outcomes using DSM (Direct Strength Method) strengths. A recommended design is put-forth using DSM to calculate the eventual load carrying capacity for the built-up box angle sections.

• 出版日期2018-5