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The seismic performance of precast reinforced concrete(RC) coupled shear walls is significantly influenced by coupling beams and the beam-to-wall joints during large deformations into plastic ranges.This study investigated the use of engineered cementitious composite(ECC) in the cast-in-place beam-to-wall joints and the upper regions of the composite coupling beams as an innovative method to improve the seismic performance of precast RC coupled shear walls.Two 1/2-scale precast coupled shear walls were tested under reversed cyclic loading and seismic behavior in terms of failure characteristic,mechanical characteristic value,load-displacement hysteresis curves,load-displacement envelope relationship,stiffness degradation,ductility and energy dissipation capacity were evaluated.Research results show that the substitution of concrete with ECC in the critical cast-in-place regions proved to be an effective method to improve the seismic performance of the two-story spatial of precast RC coupled shear walls.
The seismic performance of precast reinforced concrete (RC) coupled shear walls is significantly influenced by coupling beams and the beam-to-wall joints during large deformations into plastic ranges.This study investigated the use of engineered cementitious composite (ECC) in the cast- in-place beam-to-wall joints and the upper regions of the composite coupling beams as an innovative method to improve the seismic performance of precast RC coupled shear walls.Two 1/2-scale precast coupled shear walls were tested for and seismic behavior in terms of failure characteristic, mechanical characteristic value, load-displacement hysteresis curves, load-displacement envelope relationship, stiffness degradation, ductility and energy dissipation capacity were obtained. Research results show that the substitution of concrete with ECC in the critical cast -in-place regions proved to be an effective method to improve the seismic performance of the two-story spatial of precast RC co upled shear walls.