Experimental Research on Seismic Performance of Replaceable Steel Energy-Dissipating Joints for Prefabricated Shear Walls
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摘要: 为实现装配式剪力墙与基础的连接和震损可修复性能,提出了一种可更换钢制耗能连接节点。为探究该连接节点的抗震性能和震损可修复性能,分别对采用2种连接形式的可更换钢制耗能连接节点进行了初次加载和震损修复后再次加载的拟静力试验。结果表明:采用开竖缝和水平缝的可更换钢制耗能连接节点的最终破坏模式均由连接节点中的开缝承剪钢板破坏导致,且2种连接形式的可更换钢制耗能连接节点都表现出良好的滞回性能和耗能能力;在2种连接节点中,开竖缝承剪钢板的钢制耗能连接节点具有更好的变形和耗能能力,开水平缝承剪钢板的钢制耗能连接节点具有较高的承载力,但延性和耗能能力略有降低;且2种连接节点在震损修复后均表现出和初次加载时相近的抗震性能,验证了该连接节点能实现装配式剪力墙的震损可修复功能。
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关键词:
- 装配式剪力墙 /
- 可更换钢制耗能连接节点 /
- 拟静力试验 /
- 抗震性能 /
- 震损可修复
Abstract: In order to realize the connection between the prefabricated shear wall and the foundation while ensuring structural reparability after earthquake-induced damage, a replaceable steel energy-dissipator joint was proposed. In order to explore the seismic performance and post-earthquake repairability of the joint, quasi-static tests were conducted on replaceable steel energy-dissipating joints with two connection forms. The tests included both initial loading and reloading after repair of earthquake-induced damage. The results showed that the ultimate failure modes of the replaceable steel energy-dissipating joints with vertical slits or horizontal slits were both caused by the failure of the slotted shear plates in the joints. In addition, the two types of replaceable steel energy-dissipating joints exhibited excellent hysteretic performance and energy-dissipation capacity. In the two types of connection joints, the replaceable steel energy-dissipating joints with vertical slotted shear plates exhibited better deformation and energy-dissipation capacity; the connection joints with horizontal slotted shear plates demondtrated higher bearing capacity, but the ductility and energy-dissipation capacity were slightly reduced. Moreover, the two types of connection joints exhibited comparable seismic performance after post-earthquake repair to their initial loading conditions, therefore, it was verified that the joints realized the structural reparability after earthquake-induced damage. -
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