首页|钢-聚丙烯纤维混凝土衬砌与组合抗震缝抗错断性能研究

钢-聚丙烯纤维混凝土衬砌与组合抗震缝抗错断性能研究

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隧道建设常处于复杂的地质环境中,位于断层错动带的隧道工程具有更高的施工及服役风险,提高其抗错断性尤为重要.因此采用钢-聚丙烯纤维混凝土及组合抗震缝联合布设的措施,提高隧道结构的抗折及抗错断性能.通过ABAQUS软件对该组合结构进行数值模拟分析,研究结果表明:组合抗震缝和钢-聚丙烯纤维混凝土衬砌能大幅增强结构抗错断性能;只改变组合中的纤维掺量和钢纤维长径比,隧道纵向拉应变和压应变的降幅最大差值分别为 36.1%和 6.3%,受拉受压损伤的降幅最大差值分别为 1.7%和 13.9%,发现通过调整组合的参数能使隧道适应不同工况要求,为工程实践提供更为灵活的设计方案.
Study on the anti-fault performance of steel-polypropylene fiber concrete lined tunnel with composite seismic joint
Tunnels are often constructed in complex geological environments,and those located in fault zones are subject to higher construction and operational risks,making it crucial to enhance their fault resistance.To this end,the combined use of steel-polypropylene fiber reinforced concrete and integrated seismic joints is employed to improve the flexural and fault resistance performance of tunnel structures.Numerical simulation analysis of this composite structure was conducted using ABAQUS software.The results indicate that the combination of seismic joints and steel-polypropylene fiber reinforced concrete linings significantly enhances the fault resistance of the structure.By only adjusting the fiber content and the aspect ratio of steel fibers in the composite,the maximum reduction in longitudinal tensile and compressive strain reached 36.1%and 6.3%,respectively,while the maximum reduction in tensile and compressive damage was 1.7%and 13.9%,respectively.It was found that by adjusting the parameters of the composite,tunnels can be made to adapt to different working conditions,offering a more flexible design solution for engineering applications.

tunnelsteel-polypropylene fibercombined seismic jointsseismic mitigationresistant to faulting

张恒、冯贤庆、姬广军、高铭徽、尹子熙、汪优

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中铁二局第五工程有限公司,四川 成都 610031

中南大学 土木工程学院,湖南 长沙 410075

隧道 钢-聚丙烯纤维 组合抗震缝 减震 抗错断

国家自然科学基金资助项目国家自然科学基金资助项目中国铁建股份有限公司2022年度科技研究开发计划2020年中国中铁股份有限公司科技研究开发计划引导课题2020年中国中铁股份有限公司科技研究开发计划引导课题2022年度广州地铁设计研究院股份有限公司科研立项项目

51778633513085522022-C141243KY-2022-014

2024

10.19994/j.cnki.WEE.2024.0068

世界地震工程
中国地震局工程力学研究所 中国力学学会

世界地震工程

CSTPCD北大核心
影响因子：0.523
ISSN：1007-6069
年,卷(期)：2024.40(4)