杭州体育馆索网结构防火安全性研究  

Study on fire safety of cable-net structure in Hangzhou Gymnasium

作　　者：陈茗[1,2,3] 林鸿达 王晓春 吴珂[1,2,3] Chen Ming;Lin Hongda;Wang Xiaochun;Wu Ke(Research Center for Urban Fire Safety Engineering,Zhejiang University,Hangzhou Zhejiang 310058,China;Center of Balance Architecture,Zhejiang University,Hangzhou Zhejiang 310007,China;Key Laboratory of Offshore Geotechnics and Material of Zhejiang Province,Zhejiang University,Hangzhou Zhejiang 310058,China;Fire Management Division,Hangzhou Municipal Commission of Urban-Rural Development,Hangzhou Zhejiang 310026,China)

机构地区：[1]浙江大学城市火灾安全工程研究中心,浙江杭州310058 [2]浙江大学平衡建筑研究中心,浙江杭州310007 [3]浙江大学浙江省海洋岩土工程与材料重点实验室,浙江杭州310058 [4]杭州市城乡建设委员会消防管理处,浙江杭州310026

出　　处：《消防科学与技术》2025年第2期256-261,共6页Fire Science and Technology

摘　　要：针对杭州体育馆索网结构火灾温度敏感性高、防腐层存在引燃风险的问题,本文综合考虑火源位置、火灾荷载、自动喷水灭火系统与排烟系统有效性等因素确定火灾场景,通过FDS获取能反映大空间特征的火灾升温曲线,计算最不利场景下的构件温升,采用ANSYS结合热重试验分析索网结构的防火安全性。研究表明,由于吊顶对火羽流与高温烟气的阻挡,体育馆的最不利火源位置为中央吊顶边缘正下方,索网结构最高温度可达193℃,与场地中央火灾相比,承重索与拉杆的最高温度分别增加约119%与53%。杭州体育馆索网防腐层的引燃温度为244℃,被引燃的风险较低。索网结构构件在最不利荷载组合作用下的承载力与临界温度、结构整体稳定性和跨中最大竖向挠度均满足现行的抗火性能要求。研究结果可为大空间索网结构的抗火设计提供参考。The Hangzhou Gymnasium was built with the cable-net structure,posing severe fire safety issue,e.g.,high temperature sensitivity and potential ignition risk of the anti-corrosion layer.In this work,the fire scenarios are designed by considering various fire locations,fire loads,the effectiveness of sprinkler and smoke exhaustsystems.The FDS software is used to obtain the fire temperature rise in large-open spaces,and the temperature rise of structural components is calculated under the most adverse scenario.Based on the numerical result,the fire safety of the cable-net structure is then analyzed using ANSYS and thermogravimetric tests.This work reveals that the most adverse fire location in the Hangzhou Gymnasium is directly below the edge of the central ceiling,which is owing to the central ceiling's obstruction of the fire plume and high-temperature smoke.In the most adverse fire location,the highest temperature of the cable-net structure could reach 193 ° C.The highest temperature values of the load-bearing cables and tie rods are approximately 119% and 53% higher than the central fire case,respectively.The thermogravimetric test result shows that the ignition temperature of the anticorrosive coating of the Hangzhou Gymnasium cable-net structure is 244 ° C,indicating a low ignition risk.Moreover,under the most adverse load combination,the bearing capacity of the structural components,the critical temperature,the overall stability of the structure,and the maximum vertical deflection at the span center all meet the fire resistance requirements of current standards.This work provides a reference for the fire-resistant design of large-space cable-net structures.

关 键 词：体育馆 索网结构 防腐层 引燃风险 抗火性能 

分 类 号：X913.4[环境科学与工程—安全科学] TU998.1[建筑科学—市政工程]