Abstract Premature damage of the post-cast concrete joints of precast concrete shear walls (PSWs) was observed in the past earthquakes due to the poor connection details and stress concentration of the wall-beam-slab joints. To avoid the potential failure, a new connection method featuring steel connectors, applied in the PSWs, is firstly proposed based on the plastic damage relocation design concept. Five 1/3 scaled specimens, including one monolithic concrete shear wall (MSW) and four PSWs, were constructed and tested under quasi-static cyclic loading. Seismic performances in terms of damage modes, drift ratio versus shear force behaviors, equivalent viscous damping ratio, deformation components, and stiffness degradation characteristics of PSWs were investigated. It shows that concrete cracks are developed at the bottom of the precast shear wall panel initially and its crack widths are decreased. The connection method can provide efficient stiffness and strength for the precast concrete shear wall system as no significant degradation of shear force occurs before a drift ratio of 1/50. Precast concrete shear wall having T-shaped with non-full length type connectors (TPSW-N) has the lowest cracking shear force and one having H-shaped connectors (HPSW) possesses a more stable lateral force-resisting capacity. The equivalent viscous damping ratios of the PSWs are higher than that of the MSW up to a drift ratio of 1/100. Among the PSWs, the HPSW shows the best seismic performance by comprehensively considering the damage mode, shear force characteristics and energy dissipation capacity. The flexural deformation at the middle of the precast shear wall panel is decreased compared with that of the wall panel of the MSW. The proposed connection method moves the critical region outside the week connection zones, which could be an alternative for the conventional post-cast concrete connection scheme. A simplified five-line stiffness degradation model of PSWs, controlled by elastic, cracking, yield, peak and ultimate points, is established and verified. The simplified model can be used to estimate the stiffness degradation properties of the proposed PSWs.

中文翻译：

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带钢连接件的预制混凝土剪力墙试验研究及刚度退化简化模型

摘要 在过去的地震中，由于墙-梁-板节点的连接细节差和应力集中，观察到预制混凝土剪力墙（PSWs）的后浇混凝土节点过早损坏。为了避免潜在的故障，基于塑性损伤重定位设计理念，首次提出了一种以钢连接器为特征的新型连接方法，应用于PSW。五个 1/3 比例的试样，包括一个整体混凝土剪力墙 (MSW) 和四个 PSW，在准静态循环载荷下构建和测试。研究了在损伤模式、漂移比与剪切力行为、等效粘性阻尼比、变形分量和 PSW 的刚度退化特性方面的抗震性能。结果表明，预制剪力墙板底部混凝土裂缝最初发展，裂缝宽度减小。该连接方法可以为预制混凝土剪力墙系统提供有效的刚度和强度，因为在 1/50 的漂移比之前不会发生剪力的显着退化。T形非全长型连接件（TPSW-N）预制混凝土剪力墙具有最低的开裂剪力，H形连接件（HPSW）具有更稳定的抗侧向力能力。PSW 的等效粘性阻尼比高于 MSW，漂移比高达 1/100。在PSWs中，HPSW综合考虑损伤模式、剪力特性和耗能能力，表现出最好的抗震性能。与城市生活垃圾墙板相比，预制剪力墙板中部的弯曲变形减小。所提出的连接方法将关键区域移动到周连接区域之外，这可能是传统后浇混凝土连接方案的替代方案。建立并验证了由弹性、开裂、屈服、峰值和极限点控制的 PSW 简化五线刚度退化模型。简化模型可用于估计所提出的 PSW 的刚度退化特性。这可能是传统的后浇混凝土连接方案的替代方案。建立并验证了由弹性、开裂、屈服、峰值和极限点控制的 PSW 简化五线刚度退化模型。简化模型可用于估计所提出的 PSW 的刚度退化特性。这可能是传统的后浇混凝土连接方案的替代方案。建立并验证了由弹性、开裂、屈服、峰值和极限点控制的 PSW 简化五线刚度退化模型。简化模型可用于估计所提出的 PSW 的刚度退化特性。