Structural response modification coefficient analysis of CFST frame-composite steel plate shear walls with two-side connections

Composite structure of CFST frame-composite steel plate shear walls with two-side connections possesses high load-carrying capacity, good ductility and high energy dissipation capacity. Hence, it has good application prospects in practical engineering. In this paper, the finite element software OpenSees was used to develop the CFST-CSPSW structural system model, whose accuracy was validated by comparing with the experimental results. By using the incremental dynamic analysis (IDA) method, the seismic performance of CFST frame with CSPSWs was evaluated. In the following parameter analysis, the influence of story number, span number and structural period on the structural performance factors was analyzed. The research results indicate that CFST frame and CSPSW can work together well on resisting lateral load. Structural response modification coefficient R and displacement amplification factor C_d decrease with increasing of story number, span number and structural period. Based on the analysis results, the reasonable values of the structural response modification coefficient R=3.27 and displacement amplification factor C_d=3.05 proposed.