Seismic performance of pseudo strain-hardening cementitious composite coupling beams with different reinforcement details

摘要

The strength, stiffness, and ductility of coupling beams may significantly affect the seismic behavior of a coupled wall system. Therefore, coupling beams must be stiff and must possess strength, stiffness, and ductility capacities to spread inelastic deformations over the height of the coupled wall system under cyclic loading. Recently, the development of a new generation of pseudo strain-hardening materials that exhibit strain-hardening characteristics in tension has opened a new range of structural applications such as plastic hinge regions of structural members, coupling beams, structural wall, beam-column connections, connections for precast member, and seismic repair of structures. This paper addresses the seismic performance of pseudo strain-hardening cementitious composites (PSH2C) coupling beams, which have different details such as convention reinforcement, diagonal reinforcement or an embedded steel plate. The results show that the use of PSH2C coupling beams exhibit a better hysteretic response than conventional RC coupling beams.