双层网壳结构抗火性能数值分析  

Numerical analysis on fire resistance behavior of the double-layer grid shell structure

作　　者：陈鑫[1] 

机构地区：[1]中国人民武装警察部队学院,河北廊坊065000

出　　处：《消防科学与技术》2012年第7期691-695,共5页Fire Science and Technology

摘　　要：以老山自行车馆屋顶结构为研究对象,用FDS模拟其温度场,通过理论公式计算网壳杆件的温升,并用ANSYS进行了不同火灾场景下网壳结构抗火性能的有限元分析。分析结果表明,火源位于看台上时,高温区域内6根杆件发生了局部破坏,但并未导致结构的整体破坏;火源位于比赛场地中央时,温度应力未引起杆件的破坏。Taking Laoshan Cylcing Gymnasium as the object, use FDS to simulate the temperature distribution, use theoretical formula to calculate the temperature rise of members, and use ANSYS to conduct the Finite Element Analysis on the fire resistance of the gird shell structure in different fire scenes. Results showed that when the fire source was on the stands, six dead elements in high temperature field were damaged locally, but didn＇t cause the total instability of the roof; when the fire source was in the center of the field, no member was failed.

关 键 词：双层球面网壳结构 FDS 有限元分析 抗火性能 

分 类 号：X913.4[环境科学与工程—安全科学] TU356[建筑科学—结构工程]