首页 | 本学科首页   官方微博 | 高级检索  
     检索      

渤海地区地震危险性特征及对工程抗震设防的启示
引用本文:彭艳菊,吕悦军,徐杰,荣棉水,张力方,王俊勤.渤海地区地震危险性特征及对工程抗震设防的启示[J].地球物理学进展,2012,27(1):18-28.
作者姓名:彭艳菊  吕悦军  徐杰  荣棉水  张力方  王俊勤
作者单位:1. 中国地震局地壳应力研究所,北京,100085
2. 中国地震局地质研究所,北京,100081
3. 中海石油(中国)有限公司北京研究中心,北京,100027
基金项目:财政部2007年公益性行业科研专项,国家科技支撑计划课题
摘    要:本文分析了渤海海域地震构造环境及地震活动特征,总结了近年来对该地区潜在震源区划分的一些新认识,分析了地震危险性区划结果.在此基础上,引入地震危险性特征参数K对研究区进行地震危险性分区,通过不同场点的地震危险性曲线证明了地震环境造成的危险性差异,并以研究区内3个概率水准的地震动峰值加速度的比值统计证明了引入地震危险性分区的必要性.研究表明:(1)不同概率水准的地震动参数之间不存在固定的比例关系,受地震环境影响,地震危险性分区和地震动参数区划图结合使用可以更准确地反应地震危险性特征;(2)对于一般工程,根据地震动参数区划图所给的50年超越概率10%的地震动参数折算所得到的小震的地震作用不具有统一的概率水准,抗震设防目标的实现没有科学保证;海洋平台抗震设计中利用强度水平地震推算得到韧性水平地震作用也不具有统一的概率水准;(3)将地震危险性分区和地震动参数区划结合使用或编制统一抗倒塌水准的区划图是一般工程抗震设防的科学做法,对于海洋平台的抗震设防,宜明确韧性水平地震作用的概率水准.

关 键 词:地震危险性  抗震设防  设防水准  设防参数  渤海

Seismic risk zoning in Bohai and its inspiration to engineering earthquake resistance
PENG Yan-ju , LU Yue-jun , XU Jie , RONG Mian-shui , ZHANG Li-fang , WANG Jun-qin.Seismic risk zoning in Bohai and its inspiration to engineering earthquake resistance[J].Progress in Geophysics,2012,27(1):18-28.
Authors:PENG Yan-ju  LU Yue-jun  XU Jie  RONG Mian-shui  ZHANG Li-fang  WANG Jun-qin
Institution:1.Institute of Crustal Dynamics,China Earthquake Administration,Beijing 100085,China; 2.Institute of Geology,China Earthquake Administration,Beijing 100029,China; 3.Bejing Research Center of China National Oil Company,Beijing 100010,China)
Abstract:This article carries out an comprehensive evaluation on the seismicity and seismotectonic environments of Bohai Sea,sums up the new viewpoints on the division of potential seismic source zone,calculates the seismic risk,and makes an analysis on the seismic ground motion zontation.On this basis,the shape parameter of seismic risk curve,that is K,is introduced to delineate the seismic risk zone.The differences of seismic risk caused by seismic activity environment are demonstrated by the seismic risk curves at different sites.The ratios of ground motion for 3 exceeding probabilities illustrate the necessity of seismic risk zonation.The results show that:(1) There exists no fixed proportion between the ground motion of different exceeding probabilities,and it is effected by regional seismic environment,the combination of seismic risk zonation and seismic ground motion parameter zonation is a proper and comprehensive representation of seismic risk.(2) For the general engineering,the small earthquake is deduced from the ground motion with a exceeding probability of 10% in 50 years on the seismic ground motion zonation map,and their exceeding probability in different region are inconsistent with each other,and the fortification goals have no scientific guarantee.The ground motion of ductility level for the offshore platform design deduced from that of strength level also has no consistent exceeding probabilities.(3) The combination of seismic risk zonation and seismic ground motion zonation or compiling the seismic zoning map against collapse is the scientific choice for the general engineering,and for the offshore platform,the explicit exceeding probability of ductility design earthquake should be determined.
Keywords:seismic risk  seismic fortification  probability of exceedance  design parameters of ground motion  Bohai
本文献已被 CNKI 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号