Topology optimization of supporting structure for seismic response reduction of an arch
Topology optimization of supporting structure for seismic response reduction of an arch
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DOI：
10.1007/s11431-016-6028-z
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发表时间：
2016-03
期刊：
影响因子：
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通讯作者：
Y. Miyazu;M. Ohsaki;S. Tsuda
中科院分区：
文献类型：
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作者：
Y. Miyazu;M. Ohsaki;S. Tsuda
提出了一种减小拱地震反应的柔性支承结构。通过静力和动力两步优化问题，将支撑结构建模为桁架结构，对其拓扑结构和横截面积进行优化。第一步，通过求解静力优化问题，得到在水平荷载作用下顶部有对角位移的柔性支承结构。然后，在第二步中，柔性构件的横截面积被优化，以最小化由完全二次组合（CQC）方法评估的拱的地震响应加速度。时程地震反应分析表明，由于支承结构的柔性，屋盖法向的反应得到了有效的减小;在柔性支承结构中设置被动耗能装置，对减小拱的切向反应非常有效。
A flexible supporting structure that reduces seismic response of an arch is proposed. Topology and cross-sectional areas of the supporting structure modeled as a truss structure are optimized through two steps of static and dynamic optimization problems. In the first step, a flexible supporting structure that has diagonal displacement at the top under horizontal load is obtained by solving static optimization problems. Then, in the second step, the cross-sectional area of the flexible member is optimized to minimize the seismic response acceleration of the arch evaluated by the complete quadratic combination (CQC) method. Time-history seismic response analysis is carried out to show that the response in the normal direction of the roof successfully decreases due to flexibility of the supporting structure; in addition, installing passive energy dissipation devices into the flexible supporting structure is very effective in reducing the tangential response of the arch.