【摘要】 由于建筑物震害预测方法只能估计建筑物的破坏而不能评定建筑物的抗震能力,基于对城市建筑物潜在破坏的估计,提出了城市建筑物抗震能力的评估方法。影响城市建筑物抗震能力的因素包括城市所处的地震危险性环境和城市建筑物的易损性。为了考虑地震危险性因素,进行了以地面峰值加速度(PGA)为参数的地震危险性分析,提出了我国不同地震危险性特征分区的PGA概率密度函数;为了考虑建筑物的易损性因素,采用HAZUS-MH中的静力弹塑性分析(push-over anal-ysis)方法研究群体建筑物易损性。通过对这两个因素的研究,建立了城市建筑物抗震能力评估方法,提出的相对全概率抗震能力指数可以反映城市建筑物在其所在的地震危险性环境下所具有的抗震能力,而采用绝对全概率抗震能力指数能够比较不同建筑抗震能力的差异,再结合建筑物抗震能力评估标准,可确定抗震能力水平。以晋江市抽样建筑物抗震能力评估为例,结合震害经验,论证了该方法的有效性。更多还原

【Abstract】 Because methods for predicting seismic damage only show building damage,however,cannot estimate seismic capacity of buildings,this paper proposes a methodology for estimating seismic capacity of city building through the assessment of city building potential damage.The factors that influence seismic capacity of city building include seismic hazard environment and building vulnerability.The seismic hazard analysis of peak ground motion(PGA) was given to provide the probability density function of PGA in Chinese different seismic hazard characteristic zones for the seismic hazard factor,and the push-over analysis method in HAZUS-MH was used to analyze the group building vulnerability for the vulnerability factor.Based on studies of the two factors,the methodology for estimating seismic capacity of city building was built.The relative full probability seismic capacity index can reflect the seismic capacity of city building in a particular seismic hazard environment.The absolute full probability seismic capacity index can compare the difference of seismic capacity between different buildings.The seismic capacity level can be got with the criterion of seismic capacity assessment.Finally,the seismic capacity of sampling buildings in Jinjiang City was estimated to verify the validity of the methodology with the seismic survey.更多还原