现行规范的抗震设防目标已经不能完全满足目前的结构抗震要求. 作为现行规范的 延续与发展, 基于性能的抗震设计方法已逐步被人们所接受. 成本-效益准则是基于性能抗震 设计的一项重要原则. 首先, 根据基础隔震结构的设计特点, 采用免疫遗传算法来研究基于成 本-效益准则的隔震结构参数优化问题; 其次, 在隔震设计中同时考虑结构的初始造价、损失费 用和维修费用, 对隔震结构进行整体性的优化设计; 最后, 通过一个优化算例得到了造价最低 的隔震结构布置方案, 并验证了隔震结构比传统抗震结构在全寿命周期内更具优势.

The current building standards do not fully satisfy the fortification target required by the existing aseismic regulations. As building design continues to develop, more designers have adopted the performance-based seismic design approach. The costeffectiveness index is a crucial principle in this approach. In this study, an immune genetic algorithm is utilized to optimize the isolated structure based on the cost-effectiveness index by considering the characteristics of isolated structures. The seismic isolation design simultaneously considers the initial cost, cost of loss, and maintenance cost of the structure, and an integrated optimization of the isolated structure is conducted. An actual isolated building is used to obtain the optimal layout of the seismic isolation layer. The results demonstrate that isolated buildings are better equipped to ensure the security of the building and reduce economic loss throughout its lifetime.