An equivalent-boundary method for the shell analysis of buried pipelines under fault movement

作     者：LIU Ai-wen(刘爱文) HU Yu-xian(胡聿贤) ZHAO Feng-xin(赵凤新) LI Xiao-jun(李小军) Takada Shiro(高田至郎) ZHAO Lei(赵雷) 

作者机构：Institute of Geophysics China Earthquake Administration Beijing 100081 China Kobe University Kobe 6570013 Japan 

出 版 物：《Acta Seismologica Sinica(English Edition)》 (地震学报)

年 卷 期：2004年第17卷第z1期

页      面：150-156页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：National Natural Sciences Foundation of China (50078049) 

主　　题：buried pipeline fault movement shell analysis equivalent boundary 

摘      要：A new shell finite element method (FEM) model with an equivalent boundary is presented for estimating the re- sponse of a buried pipeline under large fault movement. The length of affected pipeline under fault movement is usually too long for a shell-mode calculation because of the limitation of memory and time of computers. In this study, only the pipeline segment near fault is modeled with plastic shell elements to study the local buckling and the large section deformation in pipe. The material property of pipe segment far away from the fault is considered as elastic, and nonlinear spring elements at equivalent boundaries are obtained and applied to two ends of shell model. Compared with the fixed-boundary shell model, the shell model with an equivalent boundary proposed by the study can remarkably reduce the needed memory and calculating time.