Vertical-to-horizontal response spectral ratio for offshore ground motions:Analysis and simplified design equation

被引：8

作者：

陈宝魁 ^{[1
]}

王东升 ^{[1
,2
]}

李宏男 ^{[1
]}

孙治国 ^{[2
]}

李超 ^{[1
]}

机构：

[1] Faculty of Infrastructure Engineering,Dalian University of Technology

[2] Road and Bridge Engineering Institute,Dalian Maritime University

来源：

JournalofCentralSouthUniversity | 2017年 / 24卷 / 01期

关键词：

offshore ground motion; vertical component; simplified design equation; vertical-to-horizontal response spectral ratio(V/H); vertical-to-horizontal peak ground acceleration ratio(V/H PGA ratio); K-NET network; seafloor earthquake measuring system(SEMS);

D O I：

暂无

中图分类号：

P75 [海洋工程]; P738.4 [海底地震];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ; 0708 ;

摘要：

In order to study the differences in vertical component between onshore and offshore motions,the vertical-to-horizontal peak ground acceleration ratio(V/H PGA ratio) and vertical-to-horizontal response spectral ratio(V/H) were investigated using the ground motion recordings from the K-NET network and the seafloor earthquake measuring system(SEMS).The results indicate that the vertical component of offshore motions is lower than that of onshore motions.The V/H PGA ratio of acceleration time histories at offshore stations is about 50%of the ratio at onshore stations.The V/H for offshore ground motions is lower than that for onshore motions,especially for periods less than 0.8 s.Furthermore,based on the results in statistical analysis for offshore recordings in the K-NET,the simplified V/H design equations for offshore motions in minor and moderate earthquakes are proposed for seismic analysis of offshore structures.

引用

页码：203 / 216

页数：14

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