ZHANG Zewang,LIANG Fayun,LIANG Xuan.Comparison of one-dimensional seismic response analysis programs for soil layer based on ground-motion records[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2020,40(03):148-157.[doi:10.13197/j.eeev.2020.03.148.zhangzw.015]





Comparison of one-dimensional seismic response analysis programs for soil layer based on ground-motion records
张泽旺 梁发云 梁轩
同济大学 地下建筑与工程系, 上海 200092
Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
seismic response analysismeasured seismic recordsSOILQUAKEDEEPSOILpredominant period
DEEPSOIL和SOILQUAKE是两种典型的土层地震反应分析程序,已有研究表明,我国学者新近开发的SOILQUAKE程序更适用于模拟深厚软土场地的非线性反应,但对于该程序的验证分析,大多是通过与其他一维土层分析程序或基于单一场地的实测记录进行对比验证,尚有待通过不同类型场地的实测记录进行验证并进一步分析程序的可靠性。本文选取日本KiK-net台网中包含Ⅱ、Ⅲ、Ⅳ类场地的多个台站地层参数及实测地震波记录,通过SOILQUAKE和DEEPSOIL建模计算,从土层放大效应及地表反应谱特征等方面进行对比分析。结果表明:(1) SOILQUAKE在Ⅱ、Ⅲ类场地情况下能够较好地预测土层响应,但在Ⅳ类场地上地震烈度达到7度之后,地表PGA计算结果比实测记录有所偏小,但误差仍在可接受范围内;而DEEPSOIL的计算值则在各类场地中均明显偏小,与实测记录的偏差随着场地特征周期及地震强度增加而增大。(2)场地土的层数较多且各层土性差异较大时,两种程序计算与实测记录的偏差比土层简单时明显增大。(3)需要注意的是,SOILQUAKE对放大效应预测足够时,有时伴随着地震反应谱“左移”的问题,该现象在各类场地中均有所存在,且在存在“左移”的案例中,现象随着场地特征周期和地震动强度的增加表现得更显著。
DEEPSOIL and SOILQUAKE are two typical programs for analyzing seismic response of soil layers. Studies have shown that the program SOILQUAKE is more suitable for modeling the nonlinear response of deep soft soil sites However, the verification of the program is mostly carried out by simplified soil layer model or based on one single site type, lacking of actual data verification and systematic recognition. In this paper, two programs for one-dimensional seismic response analysis, DEEPSOIL and SOILQUAKE, are used to calculate, and compared with the actual records from KiK-net strong earthquake observation network, so as to verify the rationality of the new program in various sites. The main results of the paper are as follows: (1)SOILQUAKE can predict the response of soil layer well under the condition of site Ⅱ and Ⅲ. The results get smaller after the intensity of earthquake reaches 7 degrees on site IV, but still better than that of DEEPSOIL. (2)when the number of strata is large and the differences in soil properties become significant, the error of both programs’ calculation becomes larger. (3)It should be noted that when the prediction of the amplification effect by SOILQUAKE is sufficient, sometimes the excellent period of the seismic response spectrum is smaller (than the records). This phenomenon exists in the calculation cases of various sites.


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更新日期/Last Update: 1900-01-01