摘要
采用欧洲钢结构协会推荐的钢材高温材料模型确定了钢材的弹性模量和极限强度。通过对导热微分方程进行数值求解,确定了结构钢构件内部的温度场。在此基础上,采用非线性有限元方法分析了空间网壳结构的火灾反应。结果表明,在火灾作用下,网壳结构的承载力迅速降低并最终导致结构的倒塌。
The structural respon.ses of a reticulated shell subjected to a fire are actively analyzed in this study through numerical investigation. The analytical model suggested by the European Convention for Constructional Steelwork is utilized to determine the Young＇s modulus and yield strength of steel material. The differential equation of heat transfer is numerically solved based on finite element method for exploring the temperature fields of concerned steel components. Following the obtained understandings, the structural responses of the reticulated shell subjected to a fire are analyzed by using the well-accepted nonlinear finite element method. The observations made from the study clearly demonstrate that the force-bearing capacity of the shell will dramatically reduce with the increasing material temperature and the entire shell will eventually collapse due to the loss of member strength.
出处
《武汉理工大学学报》
EI
CAS
CSCD
北大核心
2007年第6期69-72,84,共5页
Journal of Wuhan University of Technology
关键词
火灾反应
温度-时间曲线
温度场
非线性有限元分析
fire responses
temperature-time relationship
temperature field
nonlinear finite element analysis
