适用于RAC框架结构的地震动强度指标研究  

Ground Motion Intenity Measures of RAC Frame Structures

作　　者：侯红梅 刘文锋[1] 陈冠君 HOU Hongmei;LIU Wenfeng;CHEN Guanjun(Civil Engineering School,Qingdao University of Technology Qingdao,266033,China;College of Civil Engineering and Architecture,Binzhou University Binzhou,256600,China)

机构地区：[1]青岛理工大学土木工程学院,青岛266033 [2]滨州学院建筑工程学院,滨州256600

出　　处：《振动．测试与诊断》2022年第6期1084-1091,1241,共9页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(50878110)。

摘　　要：再生混凝土结构的合理地震动强度指标是预测和评价其抗震响应的映射判据。基于3种层数和5种再生骨料取代率的15个结构模型,选取120条地震动记录进行时程分析,综合考虑结构高度、再生骨料取代率、地震动震源机制和是否脉冲型地震动等因素的影响,评估了28个地震动强度指标与4个关键工程需求参数的相关性、有效性和充分性。研究表明:谱强度指标与工程需求参数之间具有较强的相关性;基于结构高度和再生骨料取代率的变化,不同地震动强度指标与工程需求参数相关性存在明显差异,谱速度是与4个工程需求参数综合相关性最强的地震动强度指标;再生骨料取代率、震源机制和是否脉冲型地震动都会影响相关性系数;谱强度指标表征工程需求参数具有良好的有效性和充分性。The reasonable seismic intensity index of recycled concrete structure is the mapping criterion to predict and evaluate its seismic response.Based on 15 structures of three building heights and five recycled aggregate re⁃placement rates,120 ground motion records are selected to do time history analysis.The correlation,efficiency and sufficiency of 28 seismic intensity indexes and four key engineering demand parameters are evaluated,con⁃sidering the structure height,replacement rate of recycled aggregate,earthquake source mechanism and whether the pulse ground motion.There is a strong correlation between spectral intensity index and engineering demand parameters.In terms of the changes of the structure height and replacement rate,the correlation between differ⁃ent seismic intensity indexes and engineering demand parameters is obviously different.The spectral velocity is the most correlated seismic intensity index with four engineering demand parameters.The correlation coefficient is affected by the replacement rate of the recycled aggregate,earthquake source mechanism and whether pulse ground motion.The spectral intensity indexes are effective and sufficient to characterize the engineering demand parameters.

关 键 词：再生混凝土框架结构 地震动强度指标 工程需求参数 相关性 有效性 充分性 

分 类 号：TU375.4[建筑科学—结构工程]