输电塔线体系在地震动水平-摇摆耦合作用下的响应研究

发布时间：2018-04-01 16:35

本文选题：输电塔线体系　切入点：摇摆地震动　出处：《武汉理工大学学报》2016年11期

【摘要】：通过数值模拟对输电塔线体系在地震动水平-摇摆耦合作用下的响应进行了研究。采用有限元程序分别建立了单塔和塔线耦合体系的三维有限元模型,进行模态分析和动力时程分析。对单塔和塔线体系的动力特性和在水平、摇摆和水平-摇摆耦合地震作用下的响应时程分析结果进行了对比研究。结果表明,输电线对输电塔横导线方向和顺导线方向的地震响应的影响不同,将减小输电塔横导线方向的地震效应,而将增大输电塔顺导线方向的地震效应;相比单一水平地震作用,输电塔线体系在地震动水平-摇摆耦合作用下的响应更加显著。对于输电塔等高柔结构来说,抗震设计时考虑地震动摇摆分量的影响是很有必要的。
[Abstract]:The response of transmission tower system under horizontal and rocking ground motion coupling is studied by numerical simulation. Three dimensional finite element models of single tower and tower line coupled system are established by finite element program. Modal analysis and dynamic time history analysis are carried out. The dynamic characteristics of single tower and tower line system and the response time history analysis results under horizontal, rocking and horizontal rocking coupled earthquakes are compared. The effect of transmission line on the seismic response in the direction of transmission tower is different, which will reduce the seismic effect in the direction of transverse conductor of transmission tower, but will increase the seismic effect of transmission tower along the direction of conductor, compared with the single horizontal seismic action, The response of transmission tower line system under horizontal and rocking coupling of ground motion is more obvious. It is necessary to consider the influence of rocking component of ground motion in seismic design for transmission tower and other tall and flexible structures.
【作者单位】：武汉理工大学道路桥梁与结构工程湖北省重点实验室;
【基金】：国家自然科学基金(51678462) 武汉市城建委科技计划项目(201411)
【分类号】：TM75;TU311.3

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