兰州地区剪切波速实测误差分析与评价
发布时间：2019-02-24 19:39
【摘要】：为了给兰州乃至西北地区的地震安全性评价和重大工程抗震设计提供参考,在兰州地区选取4个不同类别场地,完成由10家单位参加、使用不同仪器剪切波速现场测试误差专项实验,研究该地区剪切波速实测误差分布规律,讨论测试误差对地表加速度反应谱影响的统计特征,并给出该地区剪切波速测试误差评价。结果表明:兰州地区各单位剪切波速测试误差具有明显规律性,测试误差绝大部分符合标准正态分布,且误差大小不随深度和场地类别而改变;兰州地区波速测试水平优于全国平均水平,Ⅰ类、Ⅱ类和Ⅲ类场地的剪切波速测试精度较高,偏差较小,其平均标准差可以定为10%;就兰州地区而言,其1倍波速测试标准差引起PGA最大偏差为25%,2倍标准差为50%;给定波速测试误差下反应谱变化程度与输入波形相关,输入波频率成分与场地频率成分接近的地震输入下,误差影响较大,反之则影响较小。
[Abstract]:In order to provide a reference for seismic safety evaluation and seismic design of major projects in Lanzhou and even the northwest region, four different types of sites were selected and 10 units participated. In this paper, a special experiment of measuring error of shear wave velocity in different instruments is used to study the error distribution of shear wave velocity in this area, and the statistical characteristics of the influence of test error on the response spectrum of surface acceleration are discussed. The error evaluation of shear wave velocity measurement in this area is also given. The results show that the measurement error of every unit shear wave velocity in Lanzhou area has obvious regularity, most of the measurement errors accord with the standard normal distribution, and the error does not change with depth and site category. The testing level of wave velocity in Lanzhou area is better than the national average level. The accuracy and deviation of shear wave velocity measurement of class 鈪，
本文编号：2429868
[Abstract]:In order to provide a reference for seismic safety evaluation and seismic design of major projects in Lanzhou and even the northwest region, four different types of sites were selected and 10 units participated. In this paper, a special experiment of measuring error of shear wave velocity in different instruments is used to study the error distribution of shear wave velocity in this area, and the statistical characteristics of the influence of test error on the response spectrum of surface acceleration are discussed. The error evaluation of shear wave velocity measurement in this area is also given. The results show that the measurement error of every unit shear wave velocity in Lanzhou area has obvious regularity, most of the measurement errors accord with the standard normal distribution, and the error does not change with depth and site category. The testing level of wave velocity in Lanzhou area is better than the national average level. The accuracy and deviation of shear wave velocity measurement of class 鈪，
本文编号：2429868
本文链接：https://www.wllwen.com/jingjilunwen/jianzhujingjilunwen/2429868.html
