摘要
合理准确的估计建筑物在地震作用下的经济损失是社会防震减灾的重要组成部分,也是合理确定建筑物设防水平和实现基于性能的抗震设计的必要组成部分。为此,本文在阅读文献的基础上,提出一种新的估计方法。与以往方法不同之处是,该方法没有把结构性能离散,而是依据实际情况,把它看作是连续的,采用改进能力谱方法,确定结构的反应。把结构反应看作为随机变量,认为反应处于结构性能区间哪个位置,就会给建筑带来相应程度的破坏。同时在整个性能区间上建立了与结构反应相对应的损失函数,然后通过积分,求出建筑物的经济损失。该方法的主要优点是克服了划分结构性能水平的困难,可根据不同的性能水平估计对应的经济损失。并且可以充分利用明确的边界条件,使得建筑物经济损失估计更简便合理。
Estimation of the direct loss of earthquake-induced building damage is an impo rtant part for disaster reduction,a necessary part for determining seismic desig n criterion and realizing performance-based design.In this paper,a new method f or the estimation of earthquake induced building losses is presented.Unlike prev ious methods,structural performance in the new method is considered as a continu ous function of earthquake demand.Building response is determined by the advance d capacity spectrum method.Building response is considered as a random variable, and building damage corresponds to the building response.The building-loss func tion is established in all structural performances.Earthquake induced building l osses are calculated by integration.The new method overcomes the difficulty in c lassification of structure performance,and is capable of estimating economic los ses according to different performance levels and sufficiently utilizing definit e boundary conditions.
出处
《土木工程学报》
EI
CSCD
北大核心
2005年第3期38-43,共6页
China Civil Engineering Journal
基金
国家自然科学基金资助项目 (50 0 2 582 1 )
上海市重点学科建设基金资助
关键词
性能设计
直接经济损失
能力谱
损失函数
失效概率
performance-based design
direct losses
capacity spectrum
loss function
failure probability
