原始记录反应谱特性对时域调整记录分析的影响  

Influence of response spectral characteristics of initial records on structure response of adjusted time series

作　　者：华贝 叶献国[1] 王德才[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2017年第8期1099-1105,共7页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(51378167);安徽省自然科学基金资助项目(1708085QE103)

摘　　要：时域调整天然记录在时程分析过程中被广泛使用,原始天然记录的选择直接影响采用时域调整记录进行结构时程分析的结果。文章按照记录反应谱与目标谱的差别大小选择3组共60条Ⅱ类场地天然记录,并进行时域调整;采用调整后的各组记录对单自由度体系和多自由度体系进行弹塑性动力时程分析,对比分析了通过各组记录计算得到的位移、加速度、剪力及能量。结果表明,反应谱特性不同的原始记录时域调整后计算得到的位移反应存在差异,考虑位移反应的离散性和记录调整前、后的能量变化,建议选择原始反应谱与目标谱差别小的记录进行调整以作为地震动输入。Time domain adjustment to ground motion records is widely used in time history analysis,and the selection of initial records can directly influence the analysis results. Three groups with a totalof 60 records from type II site are selected based on the deviation between response spectra of recordsand target spectrum, and the records are adjusted to match target spectrum using time domain meth-od. Structure responses including displacement, acceleration, shear force and energy of SDOF andMDOF systems are analyzed. The results show that maximum displacement differs when the seismicinput has different initial response spectral characteristics. Taking the dispersion in displacement andenergy changes after adjustment into consideration, it is recommended to select records which havesmall deviation with target spectrum to carry out time domain spectral matching.

关 键 词：反应谱特性 时域调整 弹塑性 时程分析 

分 类 号：P315.91[天文地球—地震学]