Numerical analysis of nonlinear dynamic behavior of earth dams

作     者：Babak EBRAHIMIAN 

作者机构：School of Civil EngineeringFaculty of EngineeringUniversity of TehranTehranIran Institute of Applied MechanicsFaculty of Civil EngineeringGraz University of TechnologyGraz 8010Austria 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2011年第5卷第1期

页      面：24-40页

学科分类：1305[艺术学-设计学（可授艺术学、工学学位）] 070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 0813[工学-建筑学] 0814[工学-土木工程] 

主　　题：earth dam numerical nonlinear response dynamic analysis earthquake dam height 

摘      要：A numerical study is conducted to investigate the dynamic behavior of earth *** numerical investigation employs a fully nonlinear dynamic finite difference analysis incorporating a simple elastic perfectly plastic constitutive model to describe the stress-strain response of the soil and the Rayleigh damping to increase the level of hysteretic *** extended Masing rules are implemented into the constitutive model to explain more accurately the soil response under general cyclic *** soil stiffness and hysteretic damping change with loading *** procedures for calibrating the constructed numerical model with centrifuge test data and also a real case history are *** the latter,the Long Valley(LV)earth dam subjected to the 1980 Mammoth Lake earthquake as a real case-history is analyzed and the obtained numerical results are compared with the real measurements at the site in both the time and frequency *** good agreement is observed between computed and measured *** seems that the Masing rules combined with a simple elasto-plastic model gives reasonable numerical ***,a comprehensive parametric study is carried out to identify the effects of dam height,input motion characteristics,soil behavior,strength of the shell materials and dam reservoir condition on the dynamic response of earth *** real earthquake records with different levels and peak acceleration values(PGAs)are used as input *** results show that the crest acceleration decreases when the dam height increases and no amplification is ***,more inelastic behavior and more earthquake energy absorption are observed in higher dams.