在役结构抗震鉴定加固用地震动参数确定方法  

Method of determining ground motion parameters of seismic appraisal and reinforcement for existing structures

作　　者：周小龙[1,2] 李英民[1,2] 罗文文[1] 卢海林[2] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]武汉工程大学资源与土木工程学院,湖北武汉430073

出　　处：《长安大学学报（自然科学版）》2015年第4期54-61,68,共9页Journal of Chang’an University(Natural Science Edition)

基　　金：国家自然科学基金项目(51378404);中央高校基本科研业务费专项资金项目(CDJXS11201167);武汉工程大学科学研究基金项目(K201474)

摘　　要：为研究在役结构抗震鉴定加固用地震动参数的合理取值问题,以均匀泊松分布为地震发生的概率模型,给出不同地震风险中的结构应选用的抗震鉴定评估准则。考虑结构不同使用寿命及结构后续服役期内场地地震具有不同超越概率的影响,推导出各抗震评估准则下结构评估烈度在剩余使用寿命内的超越概率换算为设计基准期为50年的相当超越概率的计算公式;推导出各评估准则下水平地震影响系数最大值、地面峰值加速度与评估烈度之间的换算关系;给出结构在不同评估准则、不同剩余使用寿命下的抗震鉴定加固用地震动参数的调整系数。研究结果表明:研究能合理反映在役结构在后续服役期内的地震风险水平,对在役结构抗震鉴定加固的研究和应用有参考意义。In order to study the reasonable value of ground motion parameters ol seismic appralsat and reinforcement for existing structures, the seismic appraisal criteria of structures in different seismic risks was established based on the Homogeneous Poisson distribution for earthquake occurrence. In view of the different residual service lives of structures and the different exceeding probability of earthquake in different sites, the calculation formulas of exceeding probability of assessment intensities were derived~, while the exceeding probability based on the residual service life was converted to the well-matched exceeding probability based on the design reference period （i. e., 50 years）~ Besides, the conversion among maximum horizontal earthquake influence coefficient, peak ground acceleration and seismic intensity were derived The adjustment coefficient of ground motion parameters of seismic appraisal and reinforcement for structures with different seismic appraisal assessment criteria and different residual service lives were provided in this paper. The results show that the research can reflect the level of earthquake risk of existing structures in their residual service lives reasonably, and it also has reference for the research and application of ground motion parameters of seismic appraisal and reinforcement for existing structures. 10 tabs, 2 figs, 18 refs.

关 键 词：结构工程 地震动参数 超越概率 抗震鉴定 设防标准 地震危险性分区 

分 类 号：TU311[建筑科学—结构工程]