| 隧道与地下工程支护预制技术综述与展望 |
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| 引用本文： | 冯帅克, 郭正兴, 刘毅, 潘清, 徐军林, 汪国良, 邢琼. 半预制装配式地下车站侧墙底节点抗震性能试验研究[J]. 工程力学, 2023, 40(2): 190-201, 212. DOI: 10.6052/j.issn.1000-4750.2021.08.0655 |
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| 作者姓名： | 冯帅克 郭正兴 刘毅 潘清 徐军林 汪国良 邢琼 |
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| 作者单位： | 1.东南大学土木工程学院，江苏，南京 211189;2.无锡地铁集团有限公司，江苏，无锡 214100;3.中铁第四勘察设计院集团有限公司，湖北，武汉 430063 |
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| 基金项目： | 江苏省住建厅科技项目(2019ZD139)；国家重点研发计划项目(2016YFC0701703)；中国铁建股份有限公司2020年度科研计划课题项目(2020-B16) |
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| 摘 要： | 针对半预制装配式地下车站结构，提出一种新型的车站外侧墙与底板连接节点，该节点通过车站单侧半预制墙板与底板伸出的竖向U型钢筋搭接连接来实现侧墙与底板间的内力传递。为研究该节点的抗震性能，结合实际工程设计制作了3个连接区位置各不相同的足尺预制拼装节点试件和1个现浇对比节点试件。以拟静力试验为基础，结合有限元分析，研究了节点的破坏形态、承载能力、滞回性能以及U型筋搭接连接的传力性能。研究表明：U型钢筋的搭接连接能够有效传递钢筋应力；预制拼装节点在其连接区内可能出现U型筋弯弧内部混凝土的压碎破坏以及U型筋弯弧段的断裂破坏，两种破坏形态均始于钢筋与混凝土之间的粘结退化；将U型筋搭接连接区设置于车站侧墙的腋板加强段，可以使预制拼装节点呈现出与现浇节点基本相同的承载能力、破坏形态以及滞回性能；在保证不出现钢筋粘结失效的前提下，设置于腋板加强段之外的U型筋搭接连接区可以有效提高节点的抗剪承载力。
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| 关 键 词： | 半预制装配式地下车站 侧墙底节点 U型钢筋搭接连接 试验研究 抗震性能 |
| 收稿时间： | 2021-08-23 |
| 修稿时间： | 2022-02-15 |
Overview and outlook for protection and prefabrication techniques of tunnel and underground projects |
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| FENG Shuai-ke, GUO Zheng-xing, LIU Yi, PAN Qing, XU Jun-lin, WANG Guo-liang, XING Qiong. EXPERIMENTAL STUDY ON THE SEISMIC PERFORMANCE OF JOINTS BETWEEN SIDEWALLS AND FLOORS IN PARTIALLY PREFABRICATED SUBWAY STATION[J]. Engineering Mechanics, 2023, 40(2): 190-201, 212. DOI: 10.6052/j.issn.1000-4750.2021.08.0655 |
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| Authors: | FENG Shuai-ke GUO Zheng-xing LIU Yi PAN Qing XU Jun-lin WANG Guo-liang XING Qiong |
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| Affiliation: | 1.School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, China;2.Wuxi Metro Group Corporation Ltd., Wuxi, Jiangsu 214100, China;3.China Railway Siyuan Survey and Design Group Corporation Ltd., Wuhan, Hubei 430063, China |
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| Abstract: | A novel joint between the sidewall and the station floor was proposed for partially prefabricated subway stations. The internal force transmission between the partially precast sidewall and corresponding subway station floor was achieved through overlapping U-bars extending from them respectively. To investigate the seismic performance of the assembly joint, three full-scale precast joint specimens with different positions of the lap connection and one full-scale cast-in-place concrete joint specimen for comparison were designed and produced based on an actual engineering project. Quasi-static tests and finite element analysis were conducted on these four full-scale joint specimens. The critical seismic performance associated with the joints, including the failure pattern, bearing capacity, hysteretic characteristics, and mechanical performance of U-bars overlapping connection were analyzed. The results show that the local concrete compression failure inside the hook of the U-bars and the brittle fracture of the loop are the two main failure modes in the lap connection of assembly joints. Both failure modules can be attributed to the degradation of the bond between reinforcement and concrete. When the U-bars are overlapped in the haunched segment, the bearing capacity, failure pattern, and hysteretic characteristics of assembly joints are similar to those of the cast-in-place concrete joints. If failure of reinforcing steel bars bonding can be prevented, the U-bars overlapped outside the haunched segment can effectively increase the shear resistance of the joints. |
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| Keywords: | partially prefabricated subway station joints between sidewalls and floors U-bars overlapping connection experimental study seismic performance |
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