弹性SDOF体系地震动输入能量的影响因素分析  

Analysis of Influence Factor of Earthquake Input Energy of Elastic SDOF Systems

作　　者：孙国华[1,2] 顾强[1,2] 何若全[1,2] 方有珍[1,2] 

机构地区：[1]苏州科技学院土木工程学院,江苏苏州215011 [2]苏州科技学院江苏省结构工程重点实验室,江苏苏州215011

出　　处：《建筑科学与工程学报》2011年第4期63-68,共6页Journal of Architecture and Civil Engineering

基　　金：国家自然科学基金项目(50978175);江苏省高校自然科学基金项目(10KJB560004)

摘　　要：按美国抗震设计规范ATC 3-06的分类标准将4种场地类别上的420条地震波记录分为12组,进行了大量的单自由度(SDOF)体系的弹性时程分析;重点研究了场地类别、地震设计分组及阻尼比对地震动输入能量的影响;通过回归分析建立了考虑不同阻尼比影响的地震峰值等效速度与地震特征周期的相关公式。结果表明:随着阻尼比的增大,地震动输入能量呈降低趋势;地震设计分组及场地类别对地震动输入能量有显著影响。420 earthquake wave records on 4 soil sites were classified into 12 groups according to classification method of ATC 3-06 seismic design code, and a great deal of elastic time history analyses of single degree of freedom （SDOF） systems were carried out. The influence parameters, including soil site, earthquake design group and damping ratio were emphatically investigated. At last, the related formulae between earthquake peak equivalent velocity and characteristic period were established by means of regression analysis considering the effects of different damping ratios. The results indicate that earthquake input energy decreases with damping ratio increasing. Soil site and earthquake design group have significantly effect on earthquake input energy.

关 键 词：地震动输入能量 弹性单自由度体系 阻尼比 特征周期 场地类别 

分 类 号：TU311.3[建筑科学—结构工程]