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提出了基础设施网络系统两阶段抗震全局优化设计的总体设想，即系统最小总投入（造价与损失期望之和）条件下单元可靠度最优分配（系统优化）与给定可靠度约束下结构最低造价设计（结构优化），并通过建立结构可靠度与设防烈度或线型结构（如管道等）具体方案间的关系，将系统优化转化为具有较少离散变量的优化设计，并利用正交枚举法进行简化计算，从而避免了大规模非线性规划的求解及目前给定可靠度水平下结构优化技术尚不成熟的困难。
The overall assumption of the two-stage seismic global optimization design of the infrastructure network system is proposed, namely, the optimal allocation of the unit reliability (system optimization) under the condition of the minimum total investment of the system (the sum of the cost and the loss expectation) and the lowest structure under the given reliability constraints. Cost design (structural optimization), and through the establishment of relationships between structural reliability and fortification intensity or linear schemes (such as pipelines), the system optimization is transformed into an optimized design with fewer discrete variables, and the use of orthogonal elements The simplification calculations are performed in such a way as to avoid the difficulties of solving the large-scale nonlinear programming and the current structural optimization techniques at the given reliability level.