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| Experimental Research on the Joint Seismic Performance of Prefabricated Entrance in the Subway Station |
| XU Junlin1, PAN Zhengyi1, XU Junchao1, GUO Zhengxing2, FANG Cheng3, ZHU Zhangfeng3 |
1. China Railway Siyuan Survey and Design Group Co. Ltd, Wuhan, Hubei 430000, China;
2. Southeast University, Nanjing, Jiangsu 210000, China;
3. Nanjing Tech University, Nanjing, Jiangsu 210000, China |
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Abstract Research purposes: Prefabricated concrete technology has been widely used in underground structures because of its advantages of high production efficiency, easy connection, energy conservation and environmental protection. In view of the poor seismic performance of prefabricated member connections, this paper proposes a fabricated access structure with section steel plug-in connections, and discusses its joint seismic performance. Through the low cycle repeated test, the bearing capacity, energy dissipation capacity, stiffness, failure mode and other indicators of the steel connection joints are obtained and the seismic performance of the steel socket joints is evaluated.
Research conclusions: (1) The test and analysis results show that the failure mode of the specimens is the flexural ductility failure of the side wall as a whole. (2) Compared with cast-in-place specimens, the peak load-bearing capacity, stiffness, ductility and energy consumption of fabricated specimens are basically similar to those of cast-in-place specimens. (3) On the premise that the peak bearing capacity is basically the same, the specimen with a length of 500 mm of section steel has good ductility and energy dissipation performance, and is relatively economical. It is recommended to be used as the preferred scheme for the connection structure of prefabricated access joints.
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Received: 18 March 2022
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2022, Vol. 39 
