Numerical Analysis of Fire Performance of a Spacial Pre-stressed Steel Structure in Fire
The numerical model of analysis of fire performance of a spatial pre-stressed steel structure with large span was established based on the software Marc.The thermal response and structural response of the pre-stressed steel structure was computed for some nodes of the structure in fire.The different fire scenes were considered for analysis of response temperature,displacements and stresses of the nodes of the pre-stressed steel structure.It is concluded that the temperature rise of the nodes of the structure is far behind that of air near the nodes,however they are quite close as the fire lasted for 3600s and almost the same after 7200s.The results show that the displacement of the node right above the inner cable is the maximum and the node above the outer cable has the smallest value of displacement and the maximum value is about two and half times as large as the minimum.The results show that the reason why the cables are out of work is that the equilibrium between the cables and the rods of the structure is lost,but not that the stress relaxation caused by thermal expansion make the cables out of work.
Fire performance Numerical analysis Steel structure Pre-stressed
Tianhong Wang Jincan Xu Hailun Tong Xintang Wang
Faculty of Architecture,Civil Engineering and Environment,Ningbo University,Ningbo 315211,China
国际会议
西安
英文
339-342
2013-07-27（万方平台首次上网日期，不代表论文的发表时间）