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天幕工程长540m、宽31.2m,其高低起伏的空间管桁架不仅需满足建筑创意的效果,在复杂的风荷载、温度作用下还需要满足结构的弹塑性动力计算、稳定分析以及构造简洁易于施工方面的要求,从而设计出较完美适用的结构。介绍了此空间桁架结构方案的确定,并通过风洞数值模拟计算确定风振系数及荷载,进行了考虑几何非线性和材料非线性的荷载-位移全过程分析以及节点强度分析,最后得到几点设计体会。
With a length of 540m and a width of 31.2m, the spacecraft truss not only needs to meet the architectural creativity, but also needs to meet the elastic-plastic dynamic calculation of the structure under complicated wind load and temperature. The stability analysis and simple and easy construction Requirements, so as to design a more perfect and applicable structure. The scheme of this space truss structure is introduced. The wind-induced vibration coefficient and load are calculated through the numerical simulation of wind tunnel. The whole process of load-displacement considering the geometric nonlinearity and material nonlinearity is analyzed and the node strength is analyzed. Finally, Design experience.