%0 Journal Article
%T 输电塔-线体系简化模型地震作用下的连续性倒塌分析<br>Progressive Collapse Analysis of a Simplified Model for Transmission Tower-line Coupled System under Seismic Action
%A 徐震
%A 王文明
%A 林清海
%A 金树
%A 曹丹京
%A 田利
%J 地震工程学报
%D 2015
%R 10.3969/j.issn.1000-0844.2015.02.0304
%X 采用输电塔-线体系的简化模型,利用大型有限元软件ABAQUS对某输电塔进行地震作用下的连续性倒塌分析,研究输电塔的薄弱部位和倒塌全过程。分析结果表明,采用简化模型得到的输电塔薄弱环节和连续性倒塌过程与采用三塔四线模型得到的结果具有较好的一致性,简化模型可用于输电塔-线体系的连续性倒塌分析。<br>Overhead high-voltage electric-transmission lines play an important role in the operation of a reliable electrical power system.Damage to these lines can cause great economic loss and bring inconvenience to human life.A substantial number of transmission lines have been damaged by catastrophic earthquakes around the world.The transmission tower tilt or collapse,conductor breakage,foundation subsidence,and insulator destruction were the major types of failure.It is necessary to study not only the seismic response of transmission lines in the elastic and plastic phases but also their collapse process.Progressive collapse analysis is a well-understood physical occurrence in which the loss of local load-bearing capacity propagates through a system,precipitating complete collapse or a major portion of it.The vulnerable points,collapse mode,and capacity of the structure can be evaluated by it,and these data can be used for the design of new towers or for evaluating existing towers.Many scholars have studied the nonlinear responses of single transmission towers or tower-line coupled systems.Numerical simulation of progressive collapse is a challenging task,which includes material and geometric nonlinearity,contact and collision between elements,and losing the load-bearing capacity of elements.Nowadays,there are mainly four numerical analytical methods used for the collapse analysis:the discrete-element method (DEM),combined finite-discrete element method,applied-element method (AEM),and finite-element method (FEM).The FEM,based on continuum mechanics,is the most widely used method in structural engineering.For linear elastic problems,the method has proved to be advantageous.Furthermore,the method is very effective for solving nonlinear problems by using reasonable constitutive relationships.The method can be used in the solution of large-scale and complex industrial problems,while other methods are extremely difficult to use.During the collapse process under an earthquake,some elements lose load-bearing capacity,which is a problem for the FEM.Commonly,the method of removing these elements is used,which is called the birth-death element method.The conductors and ground wires can be simplified as concentrated masses for the seismic analysis of transmission tower-line coupled systems.In this paper,this method is used.With the simplified model,by using the finite-element program ABAQUS,the progressive collapse
%K 输电塔-线体系
%K 简化模型
%K 连续性倒塌分析
%K 地震作用&lt
%K br&gt
%K transmission tower-line coupled system
%K simplified model
%K progressive collapse analysis
%K earthquake action
%U http://dzgcxb.ijournals.cn/ch/reader/view_abstract.aspx?file_no=20150204&flag=1