基础设施网络系统建筑结构的设防烈度优化决策

The Optimum Decision for Structure Design Intensity in Civil Infrastructure Network System

针对土木基础设施网络系统 ,讨论了系统总投入 (造价与损失期望之和 )的评估方法 ,建立了结构设防烈度与系统总投入的函数关系 ,考虑未来损失期望 ,以系统总投入最小作为主要优化指标 ,进行了建筑结构最优设防烈度的优化决策 ,通过将系统优化变量转化为较少的离散变量 。

In this paper, the total investment (the sum of system original cost and futureloss expectation) of the civil infrastructure system (CIS)is discussed and the relationship function between structure design intensity and system total investment is built. Considering the future loss expectation and aiming at minimizing the total investment cost, the optimum structure design intensity is decided. Through changing the optimum variables into fewer discrete ones, an effective optimum method for CIS aseismic design is suggested.