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通过薄壁钢管模型对不同开启角度双层圆柱拱壳体系的抗震性能进行数值分析及试验研究。圆柱拱壳分析模型包含了6种开放角度和4种基本频率。利用MIDAS软件建立了24种双层圆柱拱壳结构模型,施加阻尼比为5%的3种不同的地震作用。研究了水平和垂直地震作用下分析模型在X、Y、Z三个方向上的动力响应特性。此外,对缩尺薄壁钢管模型进行了振动台试验。将试验结果和数值分析结果进行对比,二者加速度反应分布情况相似。水平地震作用下,数值分析和试验均在1/4和3/4节点处出现最大值,在中心节点处出现较小值。研究结果显示,圆柱拱壳模型最佳开启角度为90°。
The numerical analysis and experimental research on the seismic behavior of double-layer cylindrical arch system with different opening angles is carried out by thin-walled steel tube model. Cylindrical arch analysis model contains six kinds of open angle and four kinds of basic frequency. Twenty-four double-layer cylindrical arch structure models have been established by using MIDAS software and three kinds of different seismic actions with a damping ratio of 5% have been applied. The dynamic response characteristics of the analytical model in three directions of X, Y and Z under horizontal and vertical earthquakes are studied. In addition, a shale-scale test was conducted on the thin-walled steel tube model. The experimental results and numerical analysis results are compared, the two are similar to the distribution of acceleration response. Under horizontal seismic action, the numerical analysis and experiment show the maximum values at 1/4 and 3/4 nodes and the smaller values at the central node. The results show that the optimal opening angle of the cylindrical arch model is 90 °.