Stochastic analysis of ground response using non-recursive algorithm

作     者：Johari, A. Momeni, M. 

作者机构：Shiraz Univ Technol Dept Civil & Environm Engn Shiraz Iran 

出 版 物：《SOIL DYNAMICS AND EARTHQUAKE ENGINEERING》 (土壤动力学与地震工程)

年 卷 期：2015年第69卷

页      面：57-82页

核心收录：

学科分类：07[理学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 

主　　题：Ground response Non-recursive algorithm Hybrid Frequency Time Domain Stochastic analysis 

摘      要：During an earthquake, the amplitudes of seismic wave may amplify significantly as it propagates through the soil layers near the ground surface. Analysis of site amplification potential is strongly influenced by the uncertainty associated to the definition of soil thickness and its properties. In this paper, the non-recursive algorithm is used in linear and nonlinear Hybrid Frequency Time Domain (HFTD) approaches for stochastic analysis of site amplification. The non-recursive algorithm causes time reduction of analysis that is the essential base of stochastic analysis. The selected soil stochastic parameters are shear wave velocity, density, damping and thickness. The results of sensitivity analysis also show that the damping ratio is the most effective parameter in PGA at ground surface. The stochastic peak ground acceleration, response spectrum and amplification factor at the ground surface are determined by the two approaches for four sites with different average shear wave velocities. Comparison of the results shows that the nonlinear HI. ID approach predicts closer response to real recorded data with respect to linear HFTD.(C) 2014 Elsevier Ltd. All rights reserved.