高压输电铁塔地震时程响应分析  

Analysis on Seismic Time-history Response of High-voltage Power Transmission Tower

作　　者：孟遂民[1] 卢银均 祝一帆 丁志敏[1] 徐文洋[1] 

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002

出　　处：《广东电力》2016年第3期109-114,共6页Guangdong Electric Power

摘　　要：为研究不同输电铁塔模型在地震作用下的响应,运用ANSYS建立1D2-SZ2型铁塔刚架和梁桁三维模型,通过模态分析得到结构阻尼系数,选取2种不同自然地震波,采用地震波x方向和y方向加速度单向输入和时程分析法得到铁塔在7.1和6.9度烈度下的节点位移和塔材应力。结果表明:刚架模型与梁桁模型相比,在地震作用下塔顶节点位移响应趋势和最大位移值相差不大,主材应力偏大,斜材应力偏小,辅材最小应力位于塔身;地震波x方向输入时,最大位移值出现在梁桁模型,y方向输入出现在刚架模型;铁塔在两种地震波作用下,最大应力均位于塔身主材,但应力值都未超过材料屈服极限。In order to study response of different power transmission tower models under earthquake action,ANSYS software is used to set up ID2-SZ2 typed steel tower rigid frame and3 D model of beam-truss and structural damping coefficient is obtained by means of modal analysis.Two different kinds of natural seismic wave are selected,unidirectional input of x-direction and y-direction accelerated speed of seismic wave and time-history analysis method are used to get node displacements of the steel tower and stress of tower materials under 7.1 and6.9degree of intensity.Results indicate that compared with beamtruss model,response trend of node displacement on the tower top of the rigid frame model differs small from the maximum displacement value under earthquake action,stress of principal material is too large while that of diagonal material is relatively small,the minimum stress of auxiliary material locates in tower body.Secondly,the maximum displacement value presents to beam-truss model at the time of x-direction input of seismic wave while presents to rigid frame model at the time of y-direction input.Under two earthquake actions,the maximum stress of steel tower locates in principal material of the tower body but stress values never exceed yield limit of materials.

关 键 词：输电铁塔 模态分析 地震响应 时程分析法 

分 类 号：TM726.3[电气工程—电力系统及自动化]