Assessment of damage index and seismic performance of steel plate shear wall (SPSW) system

Abstract

Nowadays, the discussion of prevention and reduction of earthquake hazards and the introduction of methods to assess the vulnerability of structures has become very important. This study aims to investigate the failure distribution and assess the seismic behavior of a steel shear wall (SPSW) system quantitatively. Therefore, to assess the failure distribution of SPSW structures in the 4, 8, and 12-floors has been designed and analyzed. The studied structures have been analyzed under 24 far-field earthquakes in the time history analysis section. Three damage indicators of Park and Ang, Iemura and Mikami, and relative displacement were used to investigate the failure's extent and location. The average failures of all three indicators are examined to evaluate the performance levels of structures. The results show that a significant part of the floors for the relative displacement index is limited to life safety. Also, Park and Ang's and Iemura and Mikami's indices are limited to damage control. According to the results, the most damage is observed in 4-story frames. There is also damage to 8- and 12-story frames, but the amount is small. On the other hand, the evaluation of failure indices and performance levels estimates the structure's safety in terms of seismic design. Also, examining the seismic behavior of structures based on damage indices Park and Ang and Iemura and Mikami provides a more realistic amount of damage and performance levels of structures for designers.