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Dynamic reliability-based seismic optimal design of base-isolated structures

机译:基于动态可靠性的基于底座结构的地震最优设计

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This paper presents a dynamic reliability-based optimization technique for the seismic design of base-isolated structures. Firstly, the governing equation of multi-degree-of-freedom base-isolated structures is established. Then, the superstructure is unfolded by the first mode. Considering that the damping is non-classical and the total base-isolation system is un-symmetric, the complex modal analysis is adopted to uncouple the governing equation and the analytical solutions of stochastic seismic response under the Kanai-Tajimi spectrum loading are obtained. Taking the ratio between the first-order modal displacement standard deviation of the superstructure with base-isolated system and the fixed-base structure as the optimal objective function, the dynamic reliability of the isolated system displacement as the constraint, the optimal design parameters of the isolated system are obtained through the penalty function method. A 3-story building with isolated system illustrates the proposed dynamic reliability-based optimization method. It is believed that such an optimization technique provides an effective tool for the seismic design of base-isolated structures.
机译:本文提出了一种基于动态可靠性的基于可靠性的基于底座结构的优化技术。首先,建立了多程度自由度基地结构的控制方程。然后,通过第一模式展开上层结构。考虑到阻尼非经典和总的隔震系统是未对称的,复杂的模态分析采用脱开获得的控制方程和金井-治见光谱载荷下随机地震响应的解析解。以第一阶之比模态位移与基底隔开系统和固定底座结构最优目标函数,所述分离系统位移作为约束,的最佳设计参数的动态可靠性上层建筑的标准偏差孤立的系统是通过惩罚功能方法获得的。具有孤立系统的3层建筑说明了所提出的基于动态可靠性的优化方法。据信,这种优化技术为基部隔离结构的地震设计提供了有效的工具。

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