地震工程学报2024，Vol.46Issue(1)：126-135,145,11.DOI:10.20000/j.1000-0844.20220130001
地震动演变功率谱模型参数的统计建模
Statistical modeling of evolutionary power spectral density parameters of ground motions
摘要
Abstract
In engineering practices,the deterministic values of the response spectrum in accord-ance with seismic design codes are generally applied as evolutionary power spectral density(EPSD)parameters of ground motions.Although this treatment is convenient for engineering ap-plications,it comes with two evident disadvantages.On the one hand,parameters are not ob-tained from measured strong motion records,which makes them highly empirical.On the other hand,the ground motion samples generated by deterministic parameters are extremely regular and exhibit unitary engineering characteristics,which cannot fully reflect the randomness of ground motions.To overcome the abovementioned challenges,we selected 1 766 strong motion records in the main axis direction from PEER and divided them into 15 groups based on the site categories suggested by the Seismic Ground Motion Parameters Zonation Map of China.Subse-quently,the EPSD parameters of strong motion records were identified.Combined with the K-S test and BIC information criterion,the optimal probability models for each parameter were determined.Finally,based on statistical modeling results of EPSD parameters,representative time histories of site categories Ⅱ and Ⅲ were generated through the dimension reduction meth-od.In contrast to the recommended values from the Code for Seismic Design of Buildings,the parameters suggested in this study were derived from measured records and possessed significant randomness,thus avoiding the simplification and regularization of engineering characteristics of ground motion samples.关键词
参数识别/全随机性地震动/实测记录/统计建模/降维模拟Key words
parameter identification/fully stochastic ground motion/measured records/statistical modeling/dimension reduction simulation分类
天文与地球科学引用本文复制引用
范颖霏,姜云木,刘章军..地震动演变功率谱模型参数的统计建模[J].地震工程学报,2024,46(1):126-135,145,11.基金项目
国家自然科学基金(52108444,51778343) （52108444,51778343）
武汉工程大学第十三届研究生教育创新基金项目 （）
湖北省高等学校优秀中青年科技创新团队计划项目(T2020010) （T2020010）
