本文提出了离散变量结构最小重量设计的一个简单方法。所考虑的结构由轴力杆梁和柱组成。通过引进序列两级优化的概念,该方法避开了离散变量优化的组合性质。作为算例,给出了地震、风、活荷载和呆荷载组合作用下带有位移、频率、应力、稳定及构造要求等约束的平面和空间钢框架的优化设计。 This paper presents a simple method for designing the minimum weight of a discrete variable structure. The structure under consideration consists of axial bars and columns. By introducing the concept of two-stage optimization of sequences, this method avoids the combinatorial nature of discrete variable optimization. As an example, the optimal design of plane and space steel frames with the constraints of displacement, frequency, stress, stability, and construction requirements under the combination of earthquake, wind, live load, and stay load is given.