A connection form of precast shear wall joint with misplaced UHPC reinforcement is proposed. In order to study the out of plane seismic performance of the joint, five out of plane quasi-static tests of shear wall with slab structures are designed and completed, including three UHPC reinforcement misplaced precast shear walls, one UHPC reinforcement discontinuous butt joint shear wall and one cast-in-situ shear wall structure with 60d reinforcement binding and overlapping. The failure mode, hysteretic curve, bearing capacity, stiffness degradation and force transfer performance of vertical reinforcement at horizontal joints are compared and analyzed. The results show that the failure mode of the dislocation connected shear wall is the same as that of the cast-in-situ shear wall, which is out of plane bending failure. Compared with the cast-in-situ shear wall, the ultimate bearing capacity of the dislocation connected shear wall is increased by 5.1%, and the storey displacement angle is between 1/80 ~ 1/50; The initial stiffness is higher than that of cast-in-situ specimens, and the later stiffness degradation, ductility and energy consumption are equivalent to that of cast-in-situ specimens; Increasing the height of UHPC post cast section can improve the overall stiffness of the structure, but the seismic performance of the structure is reduced; The stress of the vertical reinforcement at the edge of the post cast section reaches yield after the concrete cracks at the joint. The stress of the reinforcement in the UHPC post cast section is small, and the joint shows good force transfer performance, which can be designed according to the “equivalent cast-in-situ” shear wall structure.
Key words：precast shear wall; ultra high performance concrete; out of plane ;dislocation connection of reinforcement; low cycle repeated loading test; seismic performance
Key words
precast shear wall /
ultra high performance concrete /
out of plane ;dislocation connection of reinforcement /
low cycle repeated loading test /
seismic performance
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