非一致地震动作用下输电塔线体系倒塌破坏研究  

Collapse Failure Study of a Transmission Tower-line System under Non-uniform Seismic Excitations

作　　者：盖霞 GAI Xia(Audit Department,Qingdao Agricultural University,Qingdao 266109,China)

机构地区：[1]青岛农业大学审计处

出　　处：《青岛农业大学学报（自然科学版）》2019年第4期303-309,共7页Journal of Qingdao Agricultural University(Natural Science)

摘　　要：考虑地震动的非一致性,本文对输电塔线体系的倒塌现象进行了模拟研究。采用ABAQUS有限元分析软件,在考虑材料非线性及几何非线性的基础上,建立了包含四基输电塔与三跨输电线的大跨越输电塔线体系三维有限元模型。基于考虑角钢滞回性能的Tian-Ma-Qu本构模型,利用ABAQUS用户子程序对体系进行有限元分析,选取3条天然地震波以及模拟生成的人工地震波分别对输电塔线体系进行非一致激励,对比了不同激励形式下输电塔线体系的失效过程,进一步分析了体系中杆件失稳、节间位移角及结构薄弱位置等响应指标。研究结果表明不同激励形式下输电塔线体系的响应情况不同,研究可为输电塔线体系的抗倒塌研究奠定基础。This paper presents a numerical simulation on the collapse of a transmission tower-line system under non-uniform seismic excitations.A three-dimension finite element(FE)model of the transmission tower-line system(including four towers and three spans transmission lines)is established by using the commercial software ABAQUS.In order to accurately capture nonlinear behaviors of steel angles,the Tian-Ma-Qu model which is introduced into the FE model is adopted.Without the loss of generality,three classical natural seismic records are selected,and one artificial seismic wave is simulated according to the site condition.The failure studies of the transmission tower-line system under different seismic excitations are investigated in terms of the member buckling,inter-segment drift ratio and structural weak position.The analytical results show that the response of transmission tower line system is different under different excitations and it can serve as a stepping stone for the collapse resistant design of transmission tower-line systems.

关 键 词：倒塌 大跨越输电塔线体系 有限元模型 非一致激励 

分 类 号：TU355.2[建筑科学—结构工程]