Numerical study on dynamic characteristics of submerged floating tunnel under abrupt cable-breaking

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  • (School of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China)

Online published: 2024-04-29

Abstract

Aiming at an innovative engineering structure spanning the bay, the submerged floating tunnel (SFT), the three-dimensional solid model of SFT was established by using ABAQUS finite element analysis software, and taking the SFT design scheme of Funkawan Bay in Japan as the object. The lateral deformation and torsional motion response characteristics of the SFT were analyzed under the conditions of single cable break and multiple cables continuous break, and the influence of Weight-Buoyancy Ratio (WBR) on cable break response was discussed through parameter sensitivity analysis. The results show that the maximum torsional angle response and vertical displacement response of two consecutive anchor cable failures at the mid span increase by nearly three times and double respectively compared to a single anchor cable failure. Increasing the safety factor of the cable is significantly important to avoid continuous cable-breaking. In addition, the SFT equivalent model for dynamic responses analysis is proposed, which can accurately reflect the dynamic characteristics of the whole tunnel and the deformation characteristics under various loads.

Cite this article

FANG Yulin , LI Jing, CHEN Jianyun , LIU Qianping . Numerical study on dynamic characteristics of submerged floating tunnel under abrupt cable-breaking[J]. Journal of Dalian Maritime University, 2024 , 50(3) : 132 -142 . DOI: 10.16411/j.cnki.issn1006-7736.2024.03.015

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