Numerical collapse simulation based critical state analysis for framed‐wall structure subjected to earthquakes

Abstract

With the rapid developments of the constitutive theory, numerical methods, and computer software and hardware, full attention has been paid to establishing nonlinear structural models and investigating the nonlinear behavior, damage performance, and failure criterion of the structures. Consequently, this study introduces a precise analysis with a highly accurate level of simulation for an existing framed‐wall structure excited with strong ground motions. The incremental dynamic analysis (IDA) technique has been adopted to investigate the nonlinear behavior of the structure. The damage evolution and collapse pattern have been well captured in the structure based on the adopted damage model. The results showed that the maximum interstory drift (ISD) position varies at different seismic loads due to the damage initiation and propagation variation. The IDA curves show the end of the elastic stage at 0.70, 0.50, 0.70, and 0.20 g at San Francisco, Italy, Northridge, and San Fernando ground motions, respectively. Also, different collapse patterns of the structure have been observed at different ground motions and also at different intensities for the same ground motion. Therefore, the high‐rise building design should account for multiple collapse patterns. Moreover, a new IDA‐based technique is proposed to estimate the structure's maximum seismic capacity (MSC) and ensure it through the collapse analysis. The structure adopted in this study reaches its MSC at the San Francisco event at an intensity of 2.50 g. However, the MSC decreased by 40% at Italy and Northridge events and 60% at the San Fernando event. Since the seismic capacity of the structure is considered an essential ingredient in the design process, therefore, the findings of this study are supposed to lay the basis for the performance‐based seismic design of the structure.