Seismic performance of precast concrete shear walls with spiral stirrup restrained grout-anchored lapped reinforcement connection

IF 2.1 4区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Advances in Structural Engineering Pub Date : 2024-08-22 DOI:10.1177/13694332241276053
Lei Tang, Zhengxing Guo, Xulei Zang
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Abstract

Low-cycle reversed loading tests and finite element analysis were conducted on one cast-in-place (CIP) shear wall specimen and two precast concrete (PC) shear wall specimens with different configurations of spiral stirrup. By comparing the failure modes, load-carrying capacities, hysteresis behaviours, skeleton curves, deformation capacities, stiffness degradation, plastic hinge distributions, and energy dissipation capacities of the PC specimen and the PIC specimen, the mechanical properties of the PC specimen equivalent to those of the CIP specimen were verified. Both the PC and PIC specimens exhibited bending shear failure, consistent with the ductile failure design requirements of “equivalent to cast-in-place”. The peak load capacity of the PC specimen was 3.64% higher than that of the PIC specimen, and the hysteresis curve was as full as that of the CIP specimen. The stiffness degradation performance of the PC specimen was slightly lower than that of the CIP specimen in the cracking stage, but it was comparable to that of the CIP specimen after entering the elastic-plastic stage. During the yielding stage, the maximum difference in energy dissipation performance between the CP specimen and the CIP specimen did not exceed 11.34%. Both the tests and finite element analysis confirmed the effective constraint of spiral stirrup on lap joints. Setting spiral stirrup for the vertical distribution reinforcements on the web had no significant effect on the load-carrying capacity of the PC specimen, but it slightly reduced its ductility and energy dissipation performance, by no more than 6.63%. For economic and safety considerations, it is not recommended to use spiral stirrup in this area.
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采用螺旋箍筋约束灌浆锚固搭接钢筋连接的预制混凝土剪力墙的抗震性能
对一个现浇(CIP)剪力墙试件和两个螺旋箍筋配置不同的预制混凝土(PC)剪力墙试件进行了低循环反向加载试验和有限元分析。通过比较 PC 试样和 PIC 试样的破坏模式、承载能力、滞后行为、骨架曲线、变形能力、刚度退化、塑性铰链分布和耗能能力,验证了 PC 试样的力学性能与 CIP 试样相当。PC 和 PIC 试样均表现出弯曲剪切破坏,符合 "等同于现浇 "的延性破坏设计要求。PC 试样的峰值承载能力比 PIC 试样高 3.64%,滞后曲线与 CIP 试样一样饱满。在开裂阶段,PC 试样的刚度退化性能略低于 CIP 试样,但在进入弹塑性阶段后,PC 试样的刚度退化性能与 CIP 试样相当。在屈服阶段,CP 试样与 CIP 试样在耗能性能上的最大差异不超过 11.34%。试验和有限元分析都证实了螺旋箍筋对搭接接头的有效约束。在腹板的垂直分布钢筋上设置螺旋箍筋对 PC 试样的承载能力没有明显影响,但略微降低了其延性和耗能性能,降幅不超过 6.63%。出于经济和安全考虑,不建议在此区域使用螺旋箍筋。
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来源期刊
Advances in Structural Engineering
Advances in Structural Engineering 工程技术-工程:土木
CiteScore
5.00
自引率
11.50%
发文量
230
审稿时长
2.3 months
期刊介绍: Advances in Structural Engineering was established in 1997 and has become one of the major peer-reviewed journals in the field of structural engineering. To better fulfil the mission of the journal, we have recently decided to launch two new features for the journal: (a) invited review papers providing an in-depth exposition of a topic of significant current interest; (b) short papers reporting truly new technologies in structural engineering.
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