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针对现有抗震优化设计很少考虑结构非线性反应的缺点,提出了整体优化策略,并运用到钢框架结构造价最小的抗震优化设计中。以结构构件截面尺寸为设计变量,结构构件的总体积为目标函数,整体优化策略在以结构弹性强度和弹性变形为约束条件的基础上,增加弹塑性变形为约束条件,与我国抗震设计规范两阶段设计方法相对应,因此基于整体优化策略的优化设计结果可以作为最终的结构设计方案。整体优化策略不仅能够考虑结构的非线性反应,而且可以采用我国抗震规范的相关规定作为约束条件,适用于钢框架结构造价最小的抗震优化设计。
Considering the shortcomings of the existing non-linear response of the existing seismic design, the overall optimization strategy is proposed and applied to the seismic design with the least cost of the steel frame structure. Taking the sectional size of structural members as design variables and the total volume of structural members as objective function, the overall optimization strategy, based on the structural elastic strength and elastic deformation as constraints, increases the elastic-plastic deformation as the constraint condition, Therefore, the optimal design result based on the overall optimization strategy can be used as the final structural design scheme. The overall optimization strategy can not only consider the nonlinear response of the structure, but also take the relevant provisions of China’s seismic code as the constraint condition, which is suitable for the seismic design with the lowest cost of steel frame structure.