Experimental study on out-of-plane seismic performance of precast composite sidewalls of utility tunnel with grouting-sleeve joints

IF 8.2 1区 工程技术 Q1 ENGINEERING, CIVIL
Zilan Zhong, Guangfan Li, Jinqiang Li, Jiaxu Shen, Mi Zhao, Xiuli Du
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引用次数: 0

Abstract

The precast composite reinforced concrete wall with the advantages of fewer joints, superior impermeability and rapid construction provides an efficient and environmental friendly alternative in the construction of underground utility tunnels in the last few years. To investigate the seismic performance of precast concrete composite walls of utility tunnels with grouting-sleeve connection under out-of-plane loads, a series of quasi-static cyclic tests were performed on the full-scale sidewall specimens with different axial compression ratios in this study. The experimental results including the failure modes, crack distributions, and the influence of different connections on the out-of-plane seismic performance of precast concrete composite wall were carefully examined and compared with those from the cyclic tests of the cast-in-place sidewalls of the utility tunnel. The test results show that the seismic performance of the precast concrete composite sidewall specimen, such as the hysteresis curves, the ultimate bearing capacity, stiffness degradation pattern and the ductility ratio, is basically the same as that of the cast-in-place specimen, indicating that the seismic performance of the prefabricated structure is equivalent to that of the cast-in-place structure. Moreover, the grouting-sleeves of the joints can effectively transfer the reinforcement stress until the failure of the precast concrete composite sidewall specimens, which exhibits excellent out-of-plane ductility and serviceability.

带注浆-套筒接头的公用事业隧道预制复合材料侧墙平面外抗震性能试验研究
预制钢筋混凝土复合墙体具有接缝少、抗渗性好、施工速度快等优点,近年来已成为地下公用事业隧道建设中一种高效、环保的替代方案。为了研究带有灌浆套筒连接的公用事业隧道预制混凝土复合墙体在平面外荷载作用下的抗震性能,本研究对不同轴向压缩比的全尺寸侧墙试件进行了一系列准静力循环试验。实验结果包括预制混凝土复合墙体的破坏模式、裂缝分布以及不同连接方式对其平面外抗震性能的影响,并与水电隧道现浇侧墙的循环试验结果进行了比较。试验结果表明,预制混凝土复合侧墙试件的滞后曲线、极限承载力、刚度退化模式和延性比等抗震性能与现浇试件基本相同,表明预制结构的抗震性能等同于现浇结构。此外,接缝处的灌浆套筒能有效传递钢筋应力,直至预制混凝土复合侧墙试件破坏,表现出优异的平面外延性和适用性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Underground Space
Underground Space ENGINEERING, CIVIL-
CiteScore
10.20
自引率
14.10%
发文量
71
审稿时长
63 days
期刊介绍: Underground Space is an open access international journal without article processing charges (APC) committed to serving as a scientific forum for researchers and practitioners in the field of underground engineering. The journal welcomes manuscripts that deal with original theories, methods, technologies, and important applications throughout the life-cycle of underground projects, including planning, design, operation and maintenance, disaster prevention, and demolition. The journal is particularly interested in manuscripts related to the latest development of smart underground engineering from the perspectives of resilience, resources saving, environmental friendliness, humanity, and artificial intelligence. The manuscripts are expected to have significant innovation and potential impact in the field of underground engineering, and should have clear association with or application in underground projects.
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