摘要
易液化场地地震动响应是研究砂土液化的关键,为还原真实地震下土体的地震动响应(剪应变、超静孔压等),文中开展了基督城易液化场地的数值模拟研究,结合Shake2000和Deepsoil两种一维场地分析软件,并采用非线性时域算法计算得到了基督城在2010年9月和2011年2月两次大震下场地地震响应,其计算得到的地表加速度谱与实际记录的加速度谱较为一致再加上现有的基督城现场液化调查结果与数值计算结果吻合,说明该方法是合理有效的。此外,该数值计算结果可为基督城场地抗液化设计评价提供参考。
The seismic response of liquefiable sites is the key to study the liquefaction of sand. In order to restore the seismic response of soils under real earthquakes(shear strain, excess pore pressure, etc.), numerical simulation of liquefiable sites in Christchurch is carried out in this paper. Two one-dimensional site analysis software, Shake2000 and deepsoil are used,and the nonlinear time domain algorithm is used to calculate the seismic response of Christchurch in September 2010 and December 2011. The calculated surface acceleration spectra are in good agreement with the actual recorded acceleration spectra, and the existing liquefaction investigation results in Christchurch are in good agreement with the numerical results, which shows that the method is reasonable and effective.In addition, the numerical results can provide a reference for the evaluation of anti-liquefaction design of Christchurch site.
作者
沈涛
SHEN Tao(Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education, Hangzhou 310058,China;Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058,China)
出处
《低温建筑技术》
2019年第6期75-79,共5页
Low Temperature Architecture Technology
关键词
数值模拟
基督城
液化
反卷积
非线性法
numerical simulation
Christchurch
liquefaction
deconvolution
non-linear method
