基于房屋后役期的水平地震影响系数最大值调整

Adjustment of Horizontal Maximum Earthquake Affecting Coefficient Based on the Succeed Use Period of Building Structure

汶川地震后,有大量房屋需要进行抗震加固。目前,对房屋结构进行抗震加固设计,通常按新建房屋计算结构承受的水平地震作用,无法考虑结构抗震加固后役期不同而产生的影响。本文从已有文献中建立的不同设计基准期与标准设计基准期的地震超越概率的关系、水平地震影响系数最大值与地震超越概率的关系出发,计算出当加固后役期不同时,不同地震超越概率对应的水平地震影响系数最大值。在以上研究的基础上,提出了针对不同后役期时水平地震影响系数最大值折减系数的建议值。本文的研究结果,可用于考虑后役期不同时建筑结构的抗震加固设计。

There are massive building structures need to be seismic strengthened after Wenchuan Earthquake.At present,the building structure that be designed for seismic strengthening is usually computated the horizontal earthquake action as a newly structure,that is unable to consider difference which produces form the succeed use period after strengthening.Starting form the two relationships established in the exsiting literatures,that are the seismic exceeding probability relationship between the standard design reference period and the difference design reference peirod,and the relationship between the horizontal maximum earthquake affecting coefficient and the seismic exceeding probability,the maximum earthquake affecting coefficients are caculated in this paper,that correspond different succeed use period after strengthening and seismic exceeding probability,so as to consider the influence of succeed use period.On this basis,the suggestion reduction coefficient values based on different succeed use period are proposed.The results may use in the strengthening design considering the difference of succeed use period.