某体育馆多重弦支网格梁屋盖结构性能研究

Research on Structural Performance of Multiple Chord-Supported Grid Beam Roof of a Gymnasium

山西某体育馆钢屋盖采用多重弦支网格梁结构。论文应用ABAQUS有限元分析软件对该结构进行了数值模拟,将静力作用下的计算结果与施工监测数据相互校核,验证了模型的正确性。基于这一模型,分析了预应力对多重弦支网格梁力学性能的影响,并与去掉拉索和撑杆的纯网壳模型进行对比,着重研究了结构的稳定性及地震响应。研究表明:添加拉索和撑杆提高了网壳结构的整体刚度,从而改变了结构的屈曲模态,稳定性得到显著提高。

The steel roof of a gymnasium in Shanxi is a multiple chord-supported grid beam structure. The structure was simulated by ABAQUS finite element analysis software, and the static calculation results are checked with the construction monitoring data to verify the correctness of the model. Based on the model, paper analyzed the effects of prestressing on the mechanical property of multiple chord-supported grid beam, and compared with the latticed shell that removed cables and struts, focused on the stability and seismic response of the structure. Research found that adding cables and struts could improve the integral rigidity of latticed shell, thus change the buckling mode of the structure and significantly improves the stability, and improve stability significantly.