發(fā)布時間：2018-05-28 00:29

  本文選題：場地分類 + 空間分布特征　； 參考：《防災減災工程學報》2017年05期

【摘要】：剪切波速是表征土體動力特性的重要參數(shù),通�？拐鹨�(guī)范將其作為場地分類的主要指標,但不同規(guī)范選取的計算深度有所差異。基于蘇州研究區(qū)446個鉆孔的波速實測資料,統(tǒng)計分析了相對于計算深度20m和30m的等效剪切波速v_(s,20)和v_(s,30)的相關性;依據中國規(guī)范、歐盟規(guī)范和美國規(guī)范給出的場地分類標準,比較了不同抗震規(guī)范下蘇州研究區(qū)場地分類空間分布特征。結果表明:蘇州研究區(qū)場地的vs,20和vs,30之間存在良好的線性關系,其線性回歸分析的決定系數(shù)R~2為0.888;中國規(guī)范和歐美規(guī)范給出的場地分類空間分布的差異性明顯,中國規(guī)范的Ⅱ類場地分布于研究區(qū)西部局部區(qū)域、Ⅲ類場地分布于整個研究區(qū)、Ⅳ類場地呈零星分布;歐盟規(guī)范的CEU類和美國規(guī)范的DUS類場地分布于整個研究區(qū),而歐盟規(guī)范的DEU類和美國規(guī)范的EUS類場地主要分布于與東西向呈23°夾角的一個狹長區(qū)帶內。
[Abstract]:Shear wave velocity is an important parameter to characterize the dynamic characteristics of soil. The seismic code usually regards it as the main index of site classification, but the calculation depth of different codes is different. Based on the measured data of wave velocities in 446 boreholes in Suzhou Research area, the correlation between the equivalent shear wave velocities of 20 m and 30 m) and VSP / 30) is statistically analyzed, and the classification standards of the sites are given according to the Chinese code, the EU Code and the US Code. The spatial distribution characteristics of site classification in Suzhou study area under different seismic codes are compared. The results show that there is a good linear relationship between vsl20 and vsf30 in Suzhou Research area, and the coefficient of determination of the linear regression analysis is 0.888.The spatial distribution of the site classification given by the Chinese and European codes is obviously different from that of the European and American codes. The type 鈪，

本文編號：1944465