北京地区波速测试误差分布特征及其对PGA影响评价  被引量:1

Study of the in-situ shear-wave velocity test error and its impact on PGA in Beijing region

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作  者:陈卓识 袁晓铭[1,2] 李晓飞[3] CHEN Zhuoshi YUAN Xiaoming LI Xiaofei(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 Binzhou University, Binzhou 256600, China)

机构地区:[1]中国地震局工程力学研究所,黑龙江哈尔滨150080 [2]中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [3]滨州学院,山东滨州256600

出  处:《自然灾害学报》2016年第5期121-132,共12页Journal of Natural Disasters

基  金:中国地震局工程力学研究所基本科研业务费专项资助项目(2016C01);国家科技部地震行业专项(201308015)~~

摘  要:开展了北京地区波速测试误差专项实验,并研究了其对PGA的影响,得到了如下结论:北京地区波速测试误差符合标准正态分布,场地整体的测试误差保持在同一水平,误差标准差可以定为12%;北京地区波速测试误差略小于全国的平均水平,其中II类场地的测试精度较高,误差较小,III类场地的测试误差基本持平;误差越大对PGA影响越显著,定性计算工况中,0.5倍标准差的测试误差引起的PGA变化均小于20%,某些工况下,1倍标准差的测试误差可能引起PGA变化超过50%,2倍标准差的测试误差可能引起PGA变化率超过70%;输入波的频率成分与场地固有频率相近时,PGA所受影响更加明显。This paper carries out special test of wave velocity test error in Beijing region and researches its influence on peak ground acceleration(PGA). It is concluded that the wave velocity test error of Beijing region accords with standard normal distribution, whole test errors of site maintain at same level ; the standard deviation of the error may be determined as 12% ,the wave velocity test error of Beijing region is smaller slightly than average level of whole China,in which the test precision of site of Class II is higher , and its error is smaller, and that of site of Class HI balances with average level of whole;the large the error, the obvious the influence on PGA;in qualitative calculation condition, the all changes of PGA caused by test error of 0.5 standard deviation is smaller than 20% ;In some Aon- ditions,the test error equal to 1 standard deviation may induce PGA change larger than 50% ,and the test error e- qual to 2 standard deviation may induce PGA change larger than 70%, when frequency component of input wave closes to natural frequency of the site,the influence on PGA will be more obvious.

关 键 词:北京地区 剪切波速 测试误差 分布特征 PGA 

分 类 号:P315[天文地球—地震学]

 

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