Study on temperature field distribution characteristics and fire resistance performance of pin-connected cable clamps in suspension bridges under fire conditions

IF 4.3 2区工程技术 Q1 ENGINEERING, CIVIL

Structures Pub Date : 2025-09-18 DOI:10.1016/j.istruc.2025.110196

Zhiheng Ma, Yongqi Chen, Xiuli Xu, Zhijun Li, Maofeng Chen, Xuehong Li

{"title":"Study on temperature field distribution characteristics and fire resistance performance of pin-connected cable clamps in suspension bridges under fire conditions","authors":"Zhiheng Ma, Yongqi Chen, Xiuli Xu, Zhijun Li, Maofeng Chen, Xuehong Li","doi":"10.1016/j.istruc.2025.110196","DOIUrl":null,"url":null,"abstract":"<div><div>This study focuses on pin-connected cable clamps and develops a numerical model of a tanker truck fire using the Fire Dynamics Simulator (FDS) to analyze the ambient temperature distribution around the cable clamp. A refined finite element model of the clamp is established, and a sequential thermal-mechanical coupling method is employed to systematically investigate the temperature field distribution, structural strength failure modes, and anti-slip performance evolution of the clamp under high-temperature fire conditions. The results indicate that under the combined effects of cable force and temperature, failure initially occurs at the pin hole of the lower clamp ear plate. When the clamp is installed at a height exceeding 16 m, no strength failure occurs within 60 min. For clamps at a height of 12 m, slip failure occurs under all horizontal thrust conditions due to the influence of high temperature and variable friction coefficients, with the fire resistance limit decreasing significantly as the horizontal thrust increases. Based on the analysis, calculation formulas for the anti-slip frictional resistance of the clamp under high-temperature conditions and corresponding fire protection measures are proposed.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"81 ","pages":"Article 110196"},"PeriodicalIF":4.3000,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352012425020119","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}

引用次数: 0

Abstract

This study focuses on pin-connected cable clamps and develops a numerical model of a tanker truck fire using the Fire Dynamics Simulator (FDS) to analyze the ambient temperature distribution around the cable clamp. A refined finite element model of the clamp is established, and a sequential thermal-mechanical coupling method is employed to systematically investigate the temperature field distribution, structural strength failure modes, and anti-slip performance evolution of the clamp under high-temperature fire conditions. The results indicate that under the combined effects of cable force and temperature, failure initially occurs at the pin hole of the lower clamp ear plate. When the clamp is installed at a height exceeding 16 m, no strength failure occurs within 60 min. For clamps at a height of 12 m, slip failure occurs under all horizontal thrust conditions due to the influence of high temperature and variable friction coefficients, with the fire resistance limit decreasing significantly as the horizontal thrust increases. Based on the analysis, calculation formulas for the anti-slip frictional resistance of the clamp under high-temperature conditions and corresponding fire protection measures are proposed.

查看原文本刊更多论文

火灾条件下悬索桥插针式电缆夹的温度场分布特征及耐火性能研究

本研究以针式电缆夹为研究对象，利用火灾动力学模拟器（FDS）建立了油罐车火灾的数值模型，分析了电缆夹周围的环境温度分布。建立了精密有限元模型，采用序贯热-力耦合方法，系统研究了高温火灾条件下夹钳的温度场分布、结构强度破坏模式和防滑性能演变。结果表明：在拉索力和温度共同作用下，下夹耳板销孔处最先发生破坏；当安装高度超过16 m时，60 min内不发生强度破坏。对于高度为12 m的夹钳，由于高温和变摩擦系数的影响，在所有水平推力条件下都发生滑移破坏，并且随着水平推力的增加，其耐火极限显著降低。在此基础上，提出了高温工况下夹紧器抗滑摩擦阻力的计算公式及相应的防火措施。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.