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本文把多目标和多级优化方法应用于钢框架结构的抗震设计中，以结构总应变能最大和结构总重量最小为优化目标，并将整个优化问题划分为系统优化和单元优化两个层次；结合现行抗震规范和钢结构规范的要求，考虑强度、位移、稳定和界限等约束条件，建立了数学模型并给出了算例。结果表明，本文的方法是合理有效的，对实际结构的抗震优化设计具有一定的参考意义。
In this paper, the multi-objective and multi-level optimization methods are applied to the seismic design of steel frame structures. The optimization goals are the maximum total strain energy and minimum total structure weight, and the entire optimization problem is divided into two levels: system optimization and unit optimization. Combined with the requirements of the existing seismic codes and specifications of steel structures, constraints such as strength, displacement, stability, and boundary conditions are considered, and mathematical models are established and examples are given. The results show that the method in this paper is reasonable and effective, and it has certain reference significance for the seismic design of the actual structure.