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Nonlinear Seismic Response Evaluation of Gradually Damaged Steel Shear Frames

Mohammad S. Miah 1, Md J. Miah 2, Md. M. Hossain 2, and Md. F. A. Faisal 2
1. Faculty of Civil Engineering, Dresden University of Technology - TU Dresden, 01187 Dresden, Germany
2. Department of Civil Engineering, University of Asia Pacific, Dhaka-1215, Bangladesh
Abstract—The objective of this paper is to investigate the dynamical responses of damaged and undamaged steel frames under earthquake loads. To do this end, experimental examination on steel frames have been conducted to investigate seismic response. Most of the high rise buildings are made of steel and prone to extreme dynamic loads such as earthquake, gale, blast and so on. For the experimental investigation, herein, two two-storey steel shear frame type structures have considered executing experimental tests by employing scaled El Centro earthquake data. In order to compare the damaged frame response a reference undamaged frame is considered. The damaged frame was tested by damaging its column step-by-step in terms of reducing columns sizes of 5, 10, 15 percent, respectively. The experimental results have shown that the displacement of damaged structures (i.e., reduced column section) is higher than the undamaged structure. As the percentage of damage increased, the displacement of the structure increased. It is also observed that the frame was vibrating more for 25 sec than 20 sec probably due to the resonance. Additionally, numerical simulations are also conducted by using SAP2000 and the results are compared with experimental data and quite good agreement is observed. 

Index Terms—dynamic response, damaged steel structure, experimental, seismic loads, collapse.

Cite: Mohammad S. Miah, Md J. Miah, Md. M. Hossain, and Md. F. A. Faisal, "Nonlinear Seismic Response Evaluation of Gradually Damaged Steel Shear Frames," International Journal of Structural and Civil Engineering Research, Vol. 8, No. 1, pp. 34-39, February 2019. doi: 10.18178/ijscer.8.1.34-39
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