采用箱形截面加固的输电塔主杆角钢承载能力的有限元参数分析  

Finite Element Parametric Analysis on Bearing Capacity of Main Member Steel Angles of Transmission Tower Reinforced by Box-Shaped Section Method

作　　者：李艳丽[1] 石磊 武振宇[2] 王子龙[1] LI Yanli;SHI Lei;WU Zhenyu;WANG Zilong(Shandong Electric Power Engineering Consulting Institute Co.,Ltd.,Jinan 250013,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]山东电力工程咨询院有限公司,济南250013 [2]哈尔滨工业大学土木工程学院,哈尔滨150090

出　　处：《工业建筑》2022年第8期41-47,共7页Industrial Construction

基　　金：科技部科技支撑计划(2014BAK14B05)。

摘　　要：提出了采用与输电塔主杆角钢同型号的加固角钢与原角钢构成箱形截面的加固方法。为了研究各参数对加固后主杆角钢承载能力的影响,设计了塔架主杆角钢单节间加固、多节间加固情况下的分析模型,采用ANSYS软件建立了主杆角钢加固后的有限元分析模型。将有限元分析结果与文献试验结果进行了对比,验证了有限元分析结果的可靠性。采用有限元参数分析的方法研究了高强螺栓预紧力P、套箍组件间距L_(t)、端部间隙j_(x)、辅助角钢长度L_(f)、套箍板厚度t_(g)、角钢屈服强度f_(y)、摩擦系数m_(u)、加固角钢肢厚t_(c)以及主角钢横截面尺寸对模型极限承载力的影响。结果表明:辅助角钢长度L_(f)、套箍板厚度t_(g)、摩擦系数m_(u)对加固后构件的极限承载力影响不大;端部间隙j_(x)、高强螺栓预紧力P对中小长细比NW系列模型极限承载力有一定影响,对其他系列模型基本无影响,套箍组件间距L_(t)对所有系列模型的极限承载力有一定影响。Reinforcing method,to constitute the box-shaped section by the angel of the transmission tower and the strengthening angle of the same size,was presented in the paper.In order to study the effect of every parameters on the bearing capacity of reinforced main member angle,analysis models of reinforced main member angles of single panel length and multi panel length were designed.Meanwhile,finite element analysis models of reinforced main member angles were also established by using ANSYS software.The reliability of finite element analysis was proved by comparing the results of finite element analysis and that from the experiments presented in references.The effects of the parameters such as the prestress force of high strength bolt P,the distance between ferrule assemblies L_(t),the end clearance j_(x),the length of subsidiary angle steel L_(f),the thickness of ferrule plate t_(g),the yield strength of angle f_(y),the friction coefficient m_(u),the wall leg thickness of angle used to strengthen the main member t_(c) and the section dimension of main members on the bearing capacity of models was researched.The results showed that the length of subsidiary angle steel L_(f),the thickness of ferrule plate t_(g),the friction coefficient m_(u) had little effect on the ultimate bearing capacity of the reinforced main members.The end clearance j_(x) and the prestress force of high strength bolt P had effects on the ultimate bearing capacity of NW series models with a small to medium slenderness ratio,and had little effect on the ultimate bearing capacity of other series models;the distance between ferrule assemblies had an effect on the ultimate bearing capacity of all reinforced main members.

关 键 词：输电塔 主杆角钢 加固构件 箱形截面 有限元分析 承载能力 

分 类 号：TU391[建筑科学—结构工程] TM75[电气工程—电力系统及自动化]