【摘要】 针对"大震不倒"的抗震设防目标,提出一种在强震作用下建筑结构的优化设计方法.依据"用相同的投资获最好的设计"的设计理念,建立以建筑结构最大的层间位移最小化作为优化目标,同时满足体积约束的优化数学模型.采用动力有限元分析模型和高效的显式动力分析方法对强烈地震波作用下的结构进行分析,获得最大的层间位移;采用改进的模拟退火算法求解优化数学模型,设计了一种产生可行解的状态发生器,由该状态发生器产生的新状态均满足所有的约束条件;在显式动力分析软件ANSYS/LS-DYNA的基础上进行二次开发,实现了一个三维框架结构的抗震优化设计.数值算例表明,该方法能获得较高质量的解,具有现实的工程意义.更多还原

【Abstract】 This paper presents an optimal design method for building structures subject to the severe earthquake loads to aim at the third level seismic fortification target,i.e.,not collapse in the severe earthquake conditions.According to design concept,get the best design with same cost,the optimization mathematics model is established.The optimal objective is to minimize the maximal inter-storey drift of the building structures under the severe earthquake loads,and to satisfy the structural volume constraint.The optimization model is solved using the improved simulated annealing algorithm.The state producer is designed for producing feasible solution.The new state produced by the state producer can satisfy all the constraints.Therefore,the constraints are handled efficiently.The seismic optimal design of a spatial frame is demonstrated by second exploitation based on the explicit dynamic analysis soft,ANSYS/LS-DYNA.The results indicate the design method can obtain high quality seismic designs.Therefore,the optimal design method proposed in this paper can be used in the practical engineering.更多还原