基于特征分类排序的典型海底地震动记录研究  

Recommendation of Ranked Typical Seafloor Ground Motions Records According to Characteristic Classification

作　　者：田浩 胡进军[1,2] 谭景阳 崔鑫 石昊 Tian Hao;Hu Jinjun;Tan Jingyang;Cui Xin;Shi Hao(Institute of Engineering Mechanics,China Earthquake Administration.Harbin 150080,China;Key Laboratory of Earthquake Engineering and Engineering Vibration of China Earthquake Administration.Harbin 150080,China)

机构地区：[1]中国地震局工程力学研究所,哈尔滨150080 [2]中国地震局地震工程与工程振动重点实验室,哈尔滨150080

出　　处：《震灾防御技术》2022年第2期360-371,共12页Technology for Earthquake Disaster Prevention

基　　金：国家重点研发计划(2021YFC3100700);国家自然科学基金项目(52078470,U1939210)。

摘　　要：面向海域工程抗震设计及评估对海底地震动的需求,基于日本相模湾海域K-NET的ETMC海底强震动记录,根据震级、震中距选取面向工程输入的949组地震动记录数据库。在考虑震源类型差异的基础上,对地震动峰值、持时、频谱等参数进行分析,通过反应谱、Arias烈度等指标描述典型海底地震动特征。根据峰值加速度、显著持时等强度指标对海底地震动记录进行排序,给出基于不同地震动特征分类下的典型地震动记录。推荐的海底地震动可为考虑不同结构需求参数的典型海域工程结构时程分析提供输入地震动。Facing the needs of seafloor ground motion selection in seismic design and evaluation of offshore engineering,according to the magnitude and epicentral distance,this paper preliminarily selected 949 sets of strong ground motion records from the ETMC sea-floor strong motion records of K-NET in Sagami Bay,Japan.On the basis of considering the difference of seismic source types,the parameters,including seismic peak value,spectrum and duration are analyzed.The typical ground motion characteristics are described by relevant measures,such as response spectrum and Arias intensity.In the light of the intensity measures,such as peak acceleration and significant duration,the typical ground motion records based on different ground motion feature classification are given.The results can provide typical input ground motion for the time history analysis of typical offshore engineering structures considering different structural requirements.

关 键 词：海域工程 输入地震动 海底地震动 特征分类 

分 类 号：P75[天文地球—海洋科学] TU435[建筑科学—岩土工程]