摘要
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。
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.
作者
张恒
冯贤庆
姬广军
高铭徽
尹子熙
汪优
ZHANG Heng;FENG Xianqing;JI Guangjun;GAO Minghui;YIN Zixi;WANG You(China Railway Erju No.5 Engineering Co.,Ltd.,Chengdu 610031,China;School of Civil Engineering,Central South University,Changsha 410075,China)
出处
《世界地震工程》
北大核心
2024年第4期76-86,共11页
World Earthquake Engineering
基金
国家自然科学基金资助项目(51778633,51308552)
中国铁建股份有限公司2022年度科技研究开发计划及资助课题(2022-C1)
2020年中国中铁股份有限公司科技研究开发计划引导课题(41,243)
2022年度广州地铁设计研究院股份有限公司科研立项项目(KY-2022-014)。
关键词
隧道
钢-聚丙烯纤维
组合抗震缝
减震
抗错断
tunnel
steel-polypropylene fiber
combined seismic joints
seismic mitigation
resistant to faulting
