摘要
建立考虑升、降温的火灾后网架力学性能分析的计算模型,利用ABAQUS提供的顺序热力耦合方法实现火灾下及火灾后网架结构力学性能的数值模拟,对典型网架火灾后的变形和承载能力进行分析。分析网架结构荷载与挠度的变化以及膜效应发生的时间。结果表明,由于火灾升、降温的影响,火灾后网架结构承载能力下降20%。
A finite element model analyzing the post fire mechanical performance of space grid structures with the temperature increase-decrease course was proposed combined with the usage of numerical simulation of post fire mechanical performance of space grid structures provided by ABAQUS.The deformation and load carrying capacity of the typical space grid structures was calculated by using this method.The changes of space grid structures load and deflection as well as the time of the membrane effect were analyzed.The results showed that the load bearing capacity reduced 20% after fire due to the temperature increase-decrease.
作者
李玉梅
王广勇
LI Yu mei WANG Guang-yong(Shandong Youth University of Political Science, Shan dong Jinan 250014, China Institute of Building Fire Re- search, China Academy of Building Research, Beijing 100013. China)
出处
《消防科学与技术》
CAS
北大核心
2016年第8期1047-1050,共4页
Fire Science and Technology
基金
建设部科学技术计划项目(2015-K6-009)
关键词
网架结构
力学性能
评估方法
承载能力
space grid structure
mechanical performance
evaluation method
load carrying capacity
