提出一种UHPC-钢筋错位连接的预制剪力墙节点连接形式，为研究该节点平面外的抗震性能，设计完成了5片剪力墙带板结构平面外拟静力试验，包括3片UHPC-钢筋错位连接预制剪力墙，1片UHPC-钢筋非连续对接连接剪力墙和1片60d钢筋绑扎搭接的现浇剪力墙结构。对比分析了各试件的破坏形态、滞回曲线、承载力、刚度退化和水平接缝处竖向钢筋的传力性能。结果表明：错位连接剪力墙试件与现浇剪力墙试件破坏形式相同，均为平面外弯曲破坏，与现浇剪力墙相比，错位连接剪力墙极限承载力提高了5.1%，层间位移角均在1/80~1/50之间；初试刚度高于现浇试件，后期刚度退化、延性和耗能与现浇试件相当；增大UHPC后浇段高度可提高结构的整体刚度，但结构抗震性能降低；后浇段边缘处竖向钢筋在接缝处混凝土开裂后应力达到屈服，UHPC后浇段内钢筋应力较小，节点表现出良好的传力性能，可按照“等同现浇”剪力墙结构设计。
关键词：预制剪力墙；UHPC；平面外；钢筋错位连接；低周反复加载试验；抗震性能
Abstract
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
关键词
预制剪力墙 /
UHPC /
平面外 /
钢筋错位连接 /
低周反复加载试验 /
抗震性能
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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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