首页|Interface failure of segmental tunnel lining strengthened with steel plates based on fracture mechanics

Interface failure of segmental tunnel lining strengthened with steel plates based on fracture mechanics

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Segmental tunnel lining strengthened with steel plates is widely used worldwide to provide a permanent strengthening method.Most existing studies assume an ideal steel-concrete interface,ignoring discontinuous deformation characteristics,making it difficult to accurately analyze the strengthened structure's failure mechanism.In this study,interfacial fracture mechanics of composite material was applied to the segmental tunnel lining strengthened with steel plates,and a numerical three-dimensional solid nonlinear model of the lining structure was established,combining the extended finite element method with a cohesive-zone model to account for the discontinuous deformation characteristics of the interface.The results accurately describe the crack propagation process,and are verified by full-scale testing.Next,dynamic simulations based on the calibrated model were conducted to analyze the sliding failure and cracking of the steel-concrete interface.Lastly,detailed location of the interface bonding failure are further verified by model test.The results show that,the cracking failure and bond failure of the interface are the decisive factors determining the instability and failure of the strengthened structure.The proposed numerical analysis is a major step forward in revealing the interface failure mechanism of strengthened composite material structures.

segmental tunnel liningsteel plate strengtheningconnecting interfacecohesive-zone modelextended finite element method

Yazhen SUN、Yang YU、Jinchang WANG、Longyan WANG

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School of Transportation and Geomatics Engineering,Shenyang Jianzhu University,Shenyang 110168,China

School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China

Institute of Transportation Engineering,Zhejiang University,Hangzhou 310058,China

Center for Balance Architecture,Zhejiang University,Hangzhou,310058,China

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国家重点基础研究发展计划(973计划)Projects of the Construction Department of Zhejiang ProvinceProjects of the Construction Department of Zhejiang Province

2015CB0578012022K0732022K169

2024

10.1007/s11709-024-1019-9

结构与土木工程前沿
高等教育出版社

结构与土木工程前沿

CSTPCDEI
影响因子：0.082
ISSN：2095-2430
年,卷(期)：2024.18(1)
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