（1 同济大学建筑工程系， 上海 200092；  2 中国电力工程顾问集团东北电力设计院有限公司， 长春 130021）

［摘要］为研究不同初始负载下不同长细比和角钢肢厚对焊接加固铁塔轴压角钢后受力性能的影响，选择了方形加固截面形式，采用ANSYS软件建立有限元模型，进行了考虑焊接间接热-结构耦合方法的数值模拟计算。数值计算结果表明，在初始负载相同的情况下，随着长细比的增大，加固后构件的极限稳定承载力逐渐减小；但并不是构件的长细比越大，加固效果越好，可能存在着最优长细比；在初始负载相同的情况下，随着加固角钢肢厚的增大，构件的极限稳定承载力逐渐增大；初始负载越大，加固效果越差。

［关键词］铁塔； 负载； 焊接加固； 角钢； 长细比； 肢厚

中图分类号：TU391文献标识码：A文章编号：1002-848X(2018)13-0086-04

Analysis of finite element parameters of angle steel axial compression member of steel tower reinforced by welding under load

Shen Zhirong1, Yuan Shiyan2

(1 Department of Structural Engineering， Tongji University， Shanghai 200092， China;  2 Northeast Electric Power Design Institute of China Power Engineering Consulting Group Corporation， Changchun 130021， China)

Abstract:In order to study the influences of the slenderness ratio and the angle steel leg thickness on the mechanical performance of angle steel axial compression member of steel tower reinforced by welding under different initial loads, the square reinforcement cross-section was selected and the finite element model was established by ANSYS software, and the numerical simulation calculation considering the indirect thermo-mechanical coupling method was carried out. The numerical calculation results show that under the same initial load, the ultimate stability bearing capacity of the reinforced member gradually decreases with the increase of the slenderness ratio. It is not the greater the slenderness ratio of the member, the better the reinforcement effect is, because an optimal slenderness ratio may exist. Under the same initial load, with the increase of the thickness of reinforced angle steel leg thickness, the ultimate stability bearing capacity of the structure increases gradually. The larger the initial load is, the worse the reinforcement effect is.

Keywords:steel tower; under load; weld reinforcement; angle steel; slenderness ratio; leg thickness

作者简介：沈之容，博士，副教授，Email：shenzhirong@tongji.edu.cn。