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考虑地层约束效应的预制侧墙节点抗震性能试验

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由于地下结构体系存在地层-结构相互作用的问题，常规的拟静力试验方法无法准确模拟地下装配式结构的受力特征。为此，本文提出了一种考虑地层约束效应影响的拟静力试验方法。研究了地层约束效应对榫卯连接预制侧墙试件及现浇侧墙试件的破坏模式、承载能力及耗能能力的影响。试验结果表明，土体约束效应的存在提高了预制侧墙试件的承载能力及耗能能力，但增大了节点区域混凝土的塑性损伤程度，这一结论在榫卯连接预制侧墙试件中体现得最明显。同时，本文提出了能够反映榫卯连接预制侧墙试件抗震性能的数值模型，结果表明，土体约束荷载对榫卯节点的承载力影响较大，但未显著改善榫卯节点的耗能能力。
Experiment on seismic performance of prefabricated sidewall joints considering strata restraint effect
The conventional quasi-static test methods cannot accurately simulate the force characteristics of underground assembled structures due to the strata-structure interaction problem of underground structural systems.Therefore,a pseudo-static test method considering strata constraint effect is proposed,called strata restraint-pseudo-static method.The effects of strata restraint effect on the damage mode,load carrying capacity and energy dissipation capacity of prefabricated sidewall specimens with mortise-tenon joints(MTWJ),and cast-in-place sidewall(CWJ)specimens were investigated.The test results show that the presence of the strata restraint effect improves the load-bearing capacity and energy dissipation of the prefabricated sidewall specimens,but aggravates concrete plastic damage,which is most evident in prefabricated sidewall specimens with mortise-tenon joints.The numerical model that can respond to the seismic performance of MTWJ specimens is proposed,and the results show that the strata restraint load has a large effect on the bearing capacity,but it is not significant to improve the energy dissipation capacity of the mortise-tenon joint.

geotechnical engineeringprefabricated sidewall structurestrata restraint effectexperimental studynumerical simulationseismic performance

何华飞、李兆平、符瑞安、马绍麟、黄明利

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北京交通大学 土木建筑工程学院,北京 100044

中铁第四勘察设计院集团有限公司,武汉 430063

岩土工程 预制侧墙结构 地层约束效应 试验研究 数值模拟 抗震性能

国家重点研发计划项目国家自然科学基金项目中铁第四勘察设计院集团有限公司科技研究开发计划项目

2018YFC0808705516780332021K026

2024

10.13229/j.cnki.jdxbgxb.20220858

吉林大学学报(工学版)
吉林大学

吉林大学学报(工学版)

CSTPCD北大核心
影响因子：0.792
ISSN：1671-5497
年,卷(期)：2024.54(6)
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