Seismic Performance of Building Frames with Buckling Resistance Braces Under Far and Near Field with and without Pulse Earthquakes

Document Type : Research Article

Authors

1 Assistant Professor Department of Civil Engineering, University of Velayat, Iranshahr, Sistan and Baluchestan, Iran

2 Assistant Professor, Department of Civil Engineering, Faculty of Engineering Science, Quchan University of Technology, Quchan, Iran

Abstract

Buckling Resistance braces are known as elements which resistant to axial loads in tension and compression. The present study is focused on the seismic behavior of low to medium height of braced building frame, which equipped with non-buckling braces under far and near fault with and without pulse earthquakes. In this research, building frames with pinned beam-to-column connections in 4 and 8 stories have been studied. Incremental dynamic analysis has been performed for 14 earthquake records from all three domains. The results obtained from the incremental dynamic analysis for the studied frames under the selected earthquake records with the conditions and characteristics affected by the distance from the earthquake site, has shown the vulnerability of 4 and 8-story frames with pinned beam-to-column joints against ground movements in all three areas distance from location of the fault and for the damage parameter of inter story drift ratio. Also, the results have shown that the bracing members are the most vulnerable members of this frame. The median acceleration that obtained to a 4-story structure and for the performance levels of immediate occupancy, life safety and collapse threshold to meet the functional conditions of the inter story drift ratio as damage parameter in far-field earthquakes are 0. 30 g, 0. 85 g and 1. 05 g, and 0. 40 g, 0. 75 g, and 0. 95 g were obtained for the near field with pulse, and 0. 30 g, 0. 80 g, and 1. 00 g for the near field without pulse, respectively.

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Amirkabir Journal of Civil Engineering
Volume 56, Issue 6
2024
Pages 677-704

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