Determining the Coefficient of Behavior of Reinforced Concrete Frame Equipped with Steel Plate Shear Walls Based on FEMA P695 Analytical Method

In recent decades, steel plate shear wall (SPSW) has been used as an efficient lateral strength system in steel structures. In this research, the seismic behavior of a relatively new system of reinforced concrete frame (RCF) equipped with SPSW has been investigated. Behavior coefficient, as the most important parameter of structural behavior, reduces the lateral forces of the earthquake and the structure with inelastic deformations, reduces the amount of earthquake energy, and structures are designed for less force than the amount of elastic behavior.

Four low, mid, and high-rise models with 4, 8, 12 and 24-stories under 44 far-field records and 56 near-field earthquake records have been proposed by using FEMA P695. Ductility and coefficient of behavior of a relatively new system of RCF equipped with SPSW have been calculated according to the proposed method FEMA P695. Due to the significant number and relatively wide range of earthquake records used in the analysis and the use of incremental dynamic analysis (IDA), considering the inherent uncertainty in the earthquake, the results of the analysis are more valid.

The results of the analysis showed the coefficient of behavior of the RCF equipped with SPSW in the limit state to be equal to 8.7, and in the allowable stress state as equal to 12.5.

A comparison of the calculated coefficient of behavior of RCF equipped with SPSW (8.7) with the proposed value of ASCE07-2010 (8) shows an increase of 8.75% that indicates this code to be conservative.