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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。
Considering the synergetic effect of concrete frame, the finite element analysis of Optics Valley Gymnasium of Huazhong University of Science and Technology with arched shuttle trussed roof was carried out. The results were compared with the results of on-site monitoring of construction process with vibrating wire strain gage Correctness of the finite element model. Three key problems are analyzed: temperature effect, seismic response and the overall stability of ultimate bearing capacity. Among them, the overall stability of ultimate bearing capacity analysis using nonlinear finite element method, other analysis does not consider the material plasticity. The results show that: the temperature change has a significant impact on the roof; the maximum stress change of the control rod under different seismic wave conditions exceeds 40%; the effect of traveling wave on the rod stress increases with decreasing wave velocity , And have different influences on the stress of members in different positions. The strength and stiffness of the webs and lateral supports of the main truss have a significant effect on the ultimate stability of the whole roof. When the frameworks with different supporting directions are considered synergistically, The stability of ultimate bearing capacity changes more obvious.