Seismic Behavior of Cold Formed Light Steel Walls with K-Braced and Upgraded Connections under Lateral Monotonic Loading

Document Type : Research Paper


1 M.Sc. of Structural Engineering, Department of Civil Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran

2 Assistant Professor, Road, Housing and Urban Development Research Center, Structural Engineering Department, Tehran, Iran


This research focused on seismic performance of cold formed light steel walls with internal K-braced and upgraded connections under lateral monotonic loading. To do so, first of all an ABAQUS software model for an available experimental specimen was made of internal cold formed K-braced frame and the accuracy of analytical results was proved in comparison with the existing experimental results. Afterwards, four finite element cold formed light steel wall samples were constructed from C section shape with dimension of 2.4 m to 2.4 m and nonlinear analysed under lateral monotonic loading by changing the single member to double cross sections for bracing and chord members connected to gusset plate. Displacement control method loading was applied to all models. For all specimens, the lateral load, stiffness, energy absorption curves in terms of absolute lateral displacement and drift were extracted as well as failure mode and ductility factor. Finally, the double K-braced cold formed members with modified connections showed adequate seismic performance with 1.91, 2.19, 1.85 and 1.03 times increase of shear resistance, energy absorption, stiffness and ductility compared to control specimen, respectively.


1- Winter, G., 1995, Development of Cold-formed light gage steel Structures, AISI Regional Technical Paper.
2- Yu, C., Vora, H., Dainard, T., Tucker, J., and Veetvkuri, P., 2007, Steel Sheet Sheathing Options forcold- formed steel framed shear wall assemblies providing shear resistance, American Iron and steel institute, Department of Engineering Technology, University of North Texas, Denton, Texas, USA.  Report No.UNT-G76234.
3- نشریه 612، 1391، آیین‌نامه طراحی و اجرای سازه‌های فولادی سبک سرد نورد، چاپ اول، انتشارات مرکز تحقیقات ساختمان و مسکن.
4-Zeynalian, M., and Ronagh, H. R., 2012, An experimental investigation on the lateral behavior of knee-braced cold-formed steel shear walls., Thin-Walled Structure, Vol.51, pp.64-75.
5- Mohebbi, S., Mirghaderi, R., Farahbod, F., and Bagheri Sabbagh, A. R., 2015. Experimental work on single and double-sided steel sheathed cold-formed steel shear walls for seismic actions.,Thin-Walled Structures, Vol.91, pp.50-62.
6- Pourabdollah, O., Farahbod, F., and Rofooei, F., 2017, The seismic performance of K-braced cold-formed steel shear panels with improved connections, Constructional Steel Research, Vol.135, pp.56-68.
7- AS/NZS 4600, 2005, Cold-formed steel structures, Australian Building Codes Board.
8- ASTM E2126-07, 2007, Standard Test Methods for Cyclic (Reversed) Load Test for Shear Resistance of Walls for Buildings, USA.