An investigation on the behavior of a new connection for precast structures under reverse cyclic loading
An investigation on the behavior of a new connection for precast structures under reverse cyclic loading
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预制结构新型连接在反向循环荷载下的性能研究
DOI：
10.1016/j.engstruct.2018.05.041
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发表时间：
2018-08-15
影响因子：
5.5
通讯作者：
Yin, Wanyun
中科院分区：
文献类型：
--
作者：
Lu, Cong;Dong, Bingqing;Yin, Wanyun
本文旨在开发一种新型的U形钢筋和ECC材料的预制梁柱连接，该连接无需模板、焊接和螺栓连接。本文对五个预制节点和两个整体式节点进行了低周反复荷载作用下的试验研究。通过反复荷载作用下的破坏模式、滞回特性、刚度退化、延性和能量耗散等指标对试件进行了评价。高强混凝土节点在滞回性能、刚度退化和耗能方面比现浇结构具有更好的抗震性能，但承载力和延性稍差。当ECC材料被纳入，这些预制连接表现出改善的承载能力和极限位移相比，使用混凝土的预制连接。它们的抗震性能与传统的现浇连接相当（在某些方面甚至更好），因此推荐用于高地震区的应用。
This paper aims to develop a new precast beam-column connection with U-shaped bars and ECC materials, which eliminates the need for formworks, welding and bolting. In this paper, an experimental study of five precast and two monolithic connections, including exterior and interior connections under reverse cyclic loading, will be carried out. All specimens were evaluated by their failure mode, hysteresis characteristics, stiffness degradation, ductility and energy dissipation under reverse cyclic loading. The proposed connection using high strength concrete exhibited more satisfactory seismic behavior than the cast-in-place construction in terms of hysteretic behavior, stiffness degradation and energy dissipation, while their load-carrying capacity and ductility were slightly lower. When ECC material is incorporated, these precast connections showed improved load-carrying capacity and ultimate displacement compared with the precast connections using concrete. Their seismic performance is comparable to (even better at certain aspects) the conventional cast-in-place connections and is therefore recommended for the applications in the high seismic region.