地震工程学报2025，Vol.47Issue(3)：598-609,12.DOI:10.20000/j.1000-0844.20231024001
基于强震记录的土层地震反应计算结果分析
Seismic response calculation results of soils based on strong motion records:a case study of SMASS
摘要
Abstract
This study examines the discrepancies between calculated results from one-dimensional equivalent linearization soil seismic response analysis and actual strong motion records.The anal-ysis uses data from the seismic monitoring array of site and structure(SMASS)operated by the Hebei Key Laboratory of Earthquake Disaster Prevention and Risk Assessment.Strong motion records from the Guye and Luanzhou earthquakes were analyzed,with a hypothetical bedrock in-put boundary set at a depth of 101 m.Ground motion results at depths of 65 and 30 m and the surface,calculated using the LSSRLI-1 program,were compared to observed data.Analysis results show the following:(1)Peak ground acceleration(PGA):While the calculated PGA trends generally match observed results,the amplification factor deviates more significantly as soil depth increases.Furthermore,the calculated soil response to ground motions with varying spectral characteristics differs from actual observations.(2)Response spectra:The difference between computed and actual response spectra increases with increasing soil depth.At 30 m depth,the computed spectra exhibit a distinct"triple-peak"anomaly not present in the observed data.(3)Characteristic periods:At shallow soil depths,the computed response spectrum shows a noticeably longer characteristic period compared to the observed spectrum.(4)Fourier spectra:Discrepancies between computed and actual Fourier spectra grow with increasing soil thickness.While both align in the low-frequency range,their trends and predominant frequencies diverge at higher frequencies.关键词
场地与结构观测台阵/一维等效线性化方法/强震动记录/地震动Key words
site-structure observation array/one-dimensional equivalent linearization method/strong motion records/ground motion分类
天文与地球科学引用本文复制引用
李平,高志寅,周楷,徐建元,陈钰鑫..基于强震记录的土层地震反应计算结果分析[J].地震工程学报,2025,47(3):598-609,12.基金项目
河北省高等学校科学技术研究计划项目(ZD2022166) （ZD2022166）
防灾科技学院研究生创新基金项目(ZY20230306) （ZY20230306）
