考虑不同地震输入方向的输电塔-线体系连续性倒塌研究  

Study of Progressive Collapse of Transmission Tower-Line System Considering Different Incident Angles of Earthquake Waves

作　　者：袁光英[1] 潘海洋[2] 马瑞升[2] 田利[2] YUAN Guangying;PAN Haiyang;MA Ruisheng;TIAN Li(Shanxi Railway Institute, Weinan 714099, Shaanxi, China;School of Civil Engineering, Shandong University, Ji’nan 250061, Shandong, China)

机构地区：[1]陕西铁路工程职业技术学院,陕西渭南714099 [2]山东大学土建与水利学院,山东济南250061

出　　处：《地震工程学报》2020年第4期840-846,共7页China Earthquake Engineering Journal

基　　金：陕西铁路工程职业技术学院项目基金(KY2016-41);渭南市2019年度重点研发计划项目(2019ZDYF-JCYJ-136)。

摘　　要：选取一实际输电线路为实例,在ABAQUS里选用梁-杆混合单元生成了该工程的计算模型。采用自主研发的用户材料子程序,研究了输电塔-线体系在3种不同地震波作用下的倒塌破坏过程与倒塌机理。结果表明:相比于侧向,纵向是输电塔-线体系的相对不利方向;两种激励情况下,最容易失效的杆件类型均为辅助材,破坏最严重杆件类型均为斜材;不同地震波以及不同输入方向通常会导致不同的薄弱位置。This paper analyzes the problem of the progressive collapse of a long-span transmission tower-line system by considering different incident angles of earthquake waves.Based on a practical project example,we established a finite element model in ABAQUS that consists of two transmission towers and three transmission lines.We then studied the collapse mechanism and failure process of the transmission tower-line system with respect to three typical seismic records(El Centro,Taft,and Northridge waves).The research results show that under seismic action the longitudinal direction is relatively more unfavorable than the lateral direction.In different types of members,the auxiliary material is most likely to fail and the bracing rod to be most seriously damaged.Different seismic waves and incident directions will result in different positions of weakness.

关 键 词：输电线路 计算模型 破坏过程 倒塌机理 薄弱位置 

分 类 号：TU318[建筑科学—结构工程]