主次结构巨型支撑的多目标拓扑优化方法

In the primary-secondary structure system, the brace pattern plays an important role in both the structural lateral stiffness and seismic performance. In order to comprehensively consider the lateral stiffness and seismic performance of primary-secondary structure, a multi-objective topological optimization method based on strain energy and stress was proposed by introducing the multi-objective optimization criterion and performance index based on strain energy and stress. The multi-objective topology optimization was carried out for mega braces form of primary-secondary structure. The deformation characteristics, energy consumption capacity, damage distribution of the components and other characteristics of the optimized structure were analyzed and compared. The results show that the multi-objective topology optimization method can not only increase the overall stiffness of the primary-secondary structure, reduce the maximum story drift of the structure, but also improve the energy dissipation capacity of the energy dissipation components, reduce the damage of the vertical components, which significantly improves the seismic performance of the primary-secondary structure.