张家界大成俄罗斯马戏城主馆屋盖结构的稳定性、抗连续倒塌及施工模拟分析

Analysis on the stability, progressive collapse resistance and construction simulation of the roof structure of Dacheng Russian Circus City main pavilion in Zhangjiajie

对大成俄罗斯马戏城主馆屋盖弦支穹顶结构进行考虑初始缺陷的双重非线性全过程分析,得到结构屈曲荷载系数-位移曲线。采用非线性动力分析方法,对断索后屋盖结构的动力响应进行了详细分析,以此评估结构的抗连续倒塌性能。结果表明,结构的稳定性和抗连续倒塌能力均满足要求。对弦支穹顶结构的预应力张拉过程进行了施工模拟分析,确定了合理的初始张力和张拉顺序,并计算了预应力降低的程度。

The dual nonlinear full-process analysis of the suspendome structure of Dacheng Russian Circus City Hall main pavillion was carried out with the initial imperfection into account, and structural buckling load coefficient-displacement curve was obtained. The nonlinear dynamic analysis method was used to analyze the dynamic response of the cable-broken roof structure in detail and to evaluate the progressive collapse resistance of the structure. The results show that the stability and the progressive collapse resisting capacity both can meet the requirements. The construction simulation analysis of the prestressing process of the suspendome structure was also conducted. The reasonable initial tension and tension sequence were determined, and the degree of prestress loss was calculated.