东南大学学报（自然科学版）2025，Vol.55Issue(3)：783-789,7.DOI:10.3969/j.issn.1001-0505.2025.03.019
车致火灾作用下桥梁拉索防火隔热层的材料与结构协同优化设计方法
A simultaneous material and structure design optimization approach for the fire-resistant insulation layer of bridge cables under vehicle-induced fires
摘要
Abstract
Stay cables are critical load-bearing components in cable-stayed bridges.The increasing occurrence of bridge fires poses threats to these cables,yet effective design methods for composite fire-resistant insulation layer are lacking.A coordinated material-structure design method for cable fire-insulation layers under vehicle-induced fires is proposed,addressing the multi-scale characteristics of composite fire-insulation materi-als.The optimization equations for material-structure coordination are established,and a decoupling strategy is presented that separates the coupled optimization problem into structural-scale design based on finite element heat transfer analysis and material-scale design based on inverse homogenization methods.The numerical implementation is achieved through CFD-FEM coupled analysis using MATLAB,PyroSim,and ANSYS.Taking a typical 50 m3 tank truck fire as an example,worst-case scenario analysis is conducted with a protec-tion target of maintaining cable surface temperature below 400 ℃.The proposed method is applied to optimize the protective layer composed of basalt fabric composites and high-silica composites,resulting in a design solu-tion that meets the protection requirements.关键词
缆索承重桥梁/斜拉索/防火隔热层/油罐车火灾/材料与结构协同优化设计/复合材料Key words
cable-supported bridges/stayed cables/fire-resistant insulation layer/tanker fires/simultaneous material and structure design optimization/composites分类
建筑与水利引用本文复制引用
周小燚,钱盛域,缪宇晨,阮欣,王浩..车致火灾作用下桥梁拉索防火隔热层的材料与结构协同优化设计方法[J].东南大学学报（自然科学版）,2025,55(3):783-789,7.基金项目
国家自然科学基金资助项目(52278149) （52278149）
江苏省科技计划资助项目(BZ2024015) （BZ2024015）
教育部"春晖计划"合作科研资助项目(HZKY20220154) （HZKY20220154）
公路桥隧智能运维技术浙江省工程研究中心开放基金资助项目. （）
