基于失效模式的全寿命分灾抗震优化设计  

Failure mode-based lifecycle damage-reduction seismic optimal design

作　　者：李志强[1] 何明胜[1] 夏多田[1] 王玉山[1] 

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832003

出　　处：《武汉大学学报（工学版）》2014年第3期369-373,共5页Engineering Journal of Wuhan University

基　　金：国家自然科学基金项目(编号:E080502);石河子大学高层次人才科研启动基金(编号:RCZX201324)

摘　　要：以结构"投资-效益"准则的全寿命优化设计为研究背景,将结构的初始工程造价及失效损失费用最小化定为优化目标,并根据两阶段的优化方案,在决策抗震结构的最优设防水平阶段引入分灾抗震的概念,建立基于全寿命理论的分灾抗震优化设计数学模型,并通过工程实例证实文中所采用的优化思路是有效、可行的;进而,在按最优设防烈度进行优化设计阶段引入失效模式优化理论,从而建立基于失效模式的全寿命分灾抗震优化设计数学模型,为全寿命优化设计提供新的思路.Taking the cost-effectiveness criterion of lifecycle optimal design as background, the minimum of initial project cost and loss expenses cost were taken as optimization objectives, according to the two-stage optimization program of cost-effectiveness criterion, a mathematical model of lifecycle damage-reduction seismic optimal design is established by introducing the concept of damage-reduction in the stage of optimal fortification intensity; and it is verified effectively by an engineering example. Furthermore, the mathe- matical model of failure mode-based lifecycle damage-reduction seismic optimal design is established by in- troducing failure modes optimization theory in the stage of optimal design according to the optimal fortifica- tion intensity, so as to provide a new idea for lifecycle optimal design.

关 键 词：失效模式 全寿命理论 分灾抗震设计 最优设防烈度 失效相关性 

分 类 号：TU318[建筑科学—结构工程]