混凝土框架-钢屋盖协同工作的受力性能研究

在考虑混凝土框架的协同作用下,对采用拱形梭式桁架屋盖的华中科技大学光谷体育馆进行了有限元分析,并与用振弦应变计进行施工过程现场监测的结果进行了对比,验证有限元模型的正确性。分析了3个关键问题:温度效应、地震响应和整体稳定极限承载力。其中,整体稳定极限承载力分析采用非线性有限元法,其他分析不考虑材料塑性。结果表明:温度变化对该屋盖受力影响显著;不同地震波作用工况下,控制杆件应力变化的最大值超过40%;行波效应对杆件应力的影响随波速的减小而增大,且对不同位置杆件应力的影响不同;主桁架腹杆和侧向支承的强度和刚度,对屋盖整体稳定极限承载力影响显著;当考虑不同支承方向的框架协同作用时,屋盖整体稳定极限承载力变化较为明显。

Studies on interaction between steel roof and reinforced concrete frame

The frame-truss roof interaction analysis of the Optics Valey Gymnasium of HUST was performed for temperature effects,seismic response and ultimate load-carrying capacity.The roof of the gymnasium was designed as steel arc truss system.The nonlinear finite element analysis of the ultimate loadcarrying capacity was conducted,however,the nonlinear effects were neglected in other analyses.The results of the construction monitoring and simulation validated the finite element model.It showed that temperature has...