Seismic Effects on Coupled Shear Wall Structure by Coupling Beams with Side Bolted Steel Plates

Abstract eng:
Reinforced concrete coupled shear wall structure is an efficient seismic resistant structural system. It has large lateral stiffness and strength, and can provide good control of horizontal displacements and story drifts of buildings under earthquake loads. Reinforced concrete coupling beams, that connect two or more walls in series, play an important role in distributing load and deformation demands throughout the wall system. In this study, nonlinear pushover analysis was conducted for coupled shear wall structure systems with bolted side-plate coupling beams. The objectives of this study are (i) to investigate the seismic response of coupled shear wall system to coupling beams with or without bolted steel plates, and (ii) to provide an improved understanding of retrofitting coupled shear wall structures by plated coupling beams. The behaviors of coupled shear wall structures under pushover loading are discussed in terms of the displacement profiles, target displacements, wall reactions, story drifts over the height, base shear, coupling beam chord rotations, and cracking and yield sequences.

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