Study on the Capacity of Perforated Ferritic Stainless Steel Lipped Channel Columns: Fid-Bau Portal

Study on the Capacity of Perforated Ferritic Stainless Steel Lipped Channel Columns

Dhanaiyendran, R. / Anbarasu, M.

This work was primarily conducted to study the axial compression capacities of perforated ferritic stainless steel lipped channel compression members. Presently, there is reasonable demand for the application of cold-formed stainless steel in the building industry due to its improved material properties over cold-formed carbon steel, like improved corrosion resistance, durability, high strength-to-weight ratio, and also provides greater stiffness and recyclability leading to aesthetic appearance. Nickel content in the chemical compositions of ferritic stainless steel is low leads to achieve the cost-effectiveness over other types of stainless steel grades. Perforations in the web of the lipped channel column are used to cater to electrical wirings, plumbing lines, connection with other members and other building services. Perforations in the structural members also lead to lesser material consumption, which helps in reducing the dead load of the structure. Currently, limited studies are available on the performance of the cold-formed ferritic stainless steel lipped channel columns with web perforation. The numerical models were developed by using ABAQUS software and verified against the test results of cold-formed carbon steel perforated channel column sections subjected to axial compression. Validated numerical modelling approach was used to perform an parametric study by varying the cross-sectional geometries, global column slenderness and different perforation sizes. The strengths calculated from the parametric study were used to check the accuracy of the current codified Direct Strength Method (DSM) provisions in North American Standards (AISI S100:2016). Based on the results, the limitation of the current DSM codal provisions and the effect of perforation have been discussed.