Seismic Performance and Resilience Assessments of Concrete Filled Tube (CFT) Composite Column Buildings

Articles in Press

Document Type : Original Article

Authors

1 MSc of Structural Engineering, Department of Civil Engineering, Zanjan University, Zanjan, Iran

2 Assistant Professor, Department of Civil Engineering, Zanjan University, Zanjan, Iran

10.22065/jsce.2023.390336.3067

Abstract

Considering the need of infrastructures and societies for suitable and flexible behavior against disasters, such as earthquake, concepts such as resilience have been defined in order to quantify the ability of a system to reduce the consequences of an earthquake or other disasters and quickly recover the structure after it. In this research, in order to study and investigate the seismic performance of steel structures with composite columns, a group of steel structures are redesigned with the assumption of using composite box columns. The nonlinear models of these structures are created. Then, losses and resilience indexes are evaluated and compared in different seismic risk levels using results of IDA analysis. Despite the reduction of steel consumption, the results of this research show the advantage and appropriate seismic performance of composite columns compared to steel columns in most of the seismic risk levels. So that the resilience index of structures with composite columns in an earthquake with a return period of 2500 years increases between 2% and 5% compared to structures with steel box columns. This improvement in performance occurs while the amount of steel consumed in the columns of moment frames and braced ones shows an average reduction of 33%.

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Journal of Structural and Construction Engineering

Articles in Press, Accepted Manuscript
Available Online from 25 October 2023

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History

  • Receive Date: 15 April 2023
  • Revise Date: 31 July 2023
  • Accept Date: 25 October 2023

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