«上一篇/Previous Article|本期目录/Table of Contents|下一篇/Next Article»

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

41卷

期数:

2024年05期

页码:

102-112

栏目:

建筑结构

出版日期:

2024-09-20

文章信息/Info

Title:

Experimental research and theoretical analysis on bearing capacity of parallel reinforced components of angle steel for transmission towers

文章编号:

1673-2049(2024)05-0102-11

作者:

章东鸿¹,刘向宏²,王嘉琪²,黎景辉¹,孙 清²,田建渊³

(1. 中国能源建设集团广东省电力设计研究院有限公司,广东 广州 510663; 2. 西安交通大学 人居环境与建筑工程学院,陕西 西安 710049; 3. 陕西银河电力杆塔有限责任公司,陕西 西安 710608)

Author(s):

ZHANG Donghong¹, LIU Xianghong², WANG Jiaqi², LI Jinghui¹, SUN Qing²,TIAN Jianyuan³

(1.China Energy Engineering Group Guangdong Electric Power Design Institute Co., Ltd., Guangzhou 510663, Guangdong, China; 2. School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China; 3.Shaanxi Yinhe Power Tower Co., Ltd, Xi'an 710608, Shannxi, China)

关键词:

输电塔;  角钢;  无损加固;  轴压试验;  数值模拟;  承载力计算方法

Keywords:

transmission tower;  angle steel;  non-destructive reinforcement;  axial compression test;  numerical simulation;  calculation method of bearing capacity

分类号:

TU391

DOI:

10.19815/j.jace.2022.09025

文献标志码:

A

摘要:

为满足输电结构持久安全运行,在不破坏原有角钢截面造成截面削弱的前提下,提出了2种基于构件并联的无损加固措施; 通过未加固、加固角钢轴压试验和有限元仿真计算,得到了各试件的荷载-位移曲线与荷载-竖向应变曲线,分析了试件的破坏机制与加固机理并基于参数分析明晰了角钢强度、抱箍连接件数量、抱箍连接件长度、构件长细比等因素对承载力的影响; 基于弯曲、扭转、弯扭屈曲临界力计算方法提出了基于构件并联的修正承载力计算公式,并验证了修正承载力计算公式的有效性。结果表明:未加固角钢易发生弯扭失稳破坏,加固方案通过增大截面抗弯刚度和改变组合构件的失稳形态,提高了极限承载力并改善了失稳后的刚度与变形性能; 有限元模型可有效反映构件破坏形式,主材角钢强度提高能增强承载力但对变形能力无影响,抱箍连接件对加固后性能无明显影响,长细比与加固效率呈正相关; 推导的弯扭失稳临界力计算理论便于计算加固构件极限承载力,有利于推广无损并联加固措施。

Abstract:

In order to meet the long-term safe operation of the transmission structure, two non-destructive parallel reinforcement measures based on the parallel reinforced components were proposed without destroying the original angel steel section and weakening the section. Through the axial compression test of single angle steel and reinforced angle steel and the finite element analysis, the load-displacement curve and load-vertical strain curve of each specimen were obtained. The failure mechanism and reinforcement mechanism of the specimen were analyzed, and the influence of the angle steel strength, the number of hoop connectors, the length of the hoop connectors, and the slenderness ratio of the members on the bearing capacity of the reinforcement members were clarified based on the parameter analysis. Based on the calculation method of bending, torsion, and bending-torsional buckling, the formula of bearing capacity based on parallel reinforcement were proposed, and the validity of the theoretical formula was verified. The results show that the unreinforced angle steel is prone to bending and torsional instability failure. By increasing the bending stiffness of the section and altering the instability mode of the composite members, the reinforcement schemes can enhance the ultimate bearing capacity and improve the stiffness and deformation performance after instability. The finite element model can effectively reflect the failure mode of the members. Increasing the strength of the main angle steel enhances the bearing capacity but has no effect on the deformation capacity. The clamping connectors have no significant impact on the performance after reinforcement, and there is a positive correlation between the slenderness ratio and the reinforcement efficiency. The derived calculation theory for the critical force of bending and torsional instability facilitates the calculation of the ultimate bearing capacity of the reinforced members, which is conducive to promoting the application of non-destructive parallel reinforcement measures.

参考文献/References:

[1] 陈 城,许海源,王 晨,等.500 kV输电塔线体系强风荷载倒塌分析[J].工业建筑,2019,49(12):36-41.
CHEN Cheng,XU Haiyuan,WANG Chen,et al.Collapse analysis of 500 kilovolts transmission tower line system under strong wind load[J].Industrial Construction,2019,49(12):36-41.
[2]肖 凯,付 兴,雷 旭,等.输电线路风致倒塌失效分析及监测方案[J].建筑科学与工程学报,2019,36(4):71-79.
XIAO Kai,FU Xing,LEI Xu,et al.Failure analysis of transmission line subjected to wind loading and monitoring scheme[J].Journal of Architecture and Civil Engineering,2019,36(4):71-79.
[3]冯云巍,曹 珂,郭耀杰,等.应用于特高压杆塔的Q420大规格角钢压杆失稳形态及其机理研究[J].武汉大学学报(工学版),2013,46(增1):79-84.
FENG Yunwei,CAO Ke,GUO Yaojie,et al.Study of buckling mode and mechanism of large-section Q420 angle steels using in ultrahigh voltage towers[J].Engineering Journal of Wuhan University,2013,46(1):79-84.
[4]曹 珂,郭耀杰,曾德伟,等.大规格Q420高强度角钢构件轴压力学性能试验研究[J].建筑结构学报,2014,35(5):65-72.
CAO Ke,GUO Yaojie,ZENG Dewei,et al.Experimental research on mechanical behavior of large-section and Q420 high-strength angle members under axial compression[J].Journal of Building Structures,2014,35(5):65-72.
[5]郑 敏,梁枢果,熊铁华.基于可靠度的输电塔抗风优化研究[J].湖南大学学报(自然科学版),2014,41(6):35-42.
ZHENG Min,LIANG Shuguo,XIONG Tiehua.Study on the reliability-based wind resistant optimization of transmission line towers[J].Journal of Hunan University(Natural Sciences),2014,41(6):35-42.
[6]韩军科,杨靖波,杨风利,等.输电铁塔加固补强承载力研究[J].工业建筑,2010,40(7):114-117,131.
HAN Junke,YANG Jingbo,YANG Fengli,et al.Study on bearing capacity of reinforced and strengthened transmission tower[J].Industrial Construction,2010,40(7):114-117,131.
[7]苏子威,李敏生,严 斌,等.新型构件并联法加固角钢输电塔试验研究及设计建议[J].建筑结构,2020,50(6):95-98.
SU Ziwei,LI Minsheng,YAN Bin,et al.Tests and design suggestion on a new type of paralleling component method in reinforcing angle steel transmission tower[J].Building Structure,2020,50(6):95-98.
[8]杨 正,谢 强,张 戬,等.输电塔T形组合角钢加固试验及理论分析[J].电力电容器与无功补偿,2020,41(3):147-155.
YANG Zheng,XIE Qiang,ZHANG Jian,et al.Test and theoretical analysis of T-section combined angles retrofitting scheme for transmission tower[J].Power Capacitor & Reactive Power Compensation,2020,41(3):147-155.
[9]刘云贺,辛振科,梁 刚,等.角钢T形组合截面压弯构件受力性能试验研究[J].建筑结构,2022,52(24):57-63.
LIU Yunhe,XIN Zhenke,LIANG Gang,et al.Experimental study on mechanical behavior of angle steel T-shaped composite area press-bending members[J].Building Structure,2022,52(24):57-63.
[10]姚 瑶,王凌旭,张有佳.高压输电塔主材的角钢并联加固轴压承载力[J].西南交通大学学报,2020,55(3):561-569.
YAO Yao,WANG Lingxu,ZHANG Youjia.Axial bearing capacity of angle parallel reinforcement for high voltage transmission towers[J].Journal of Southwest Jiaotong University,2020,55(3):561-569.
[11]刘学武,夏开全,高 燕,等.构件并联法加固输电塔的试验研究及设计建议[J].西安建筑科技大学学报(自然科学版),2011,43(6):838-844.
LIU Xuewu,XIA Kaiquan,GAO Yan,et al.Study on strengthening the structure and its design for the transmission tower[J].Journal of Xi'an University of Architecture & Technology(Natural Science Edition),2011,43(6):838-844.
[12]孙启刚,吴 健,刘海涛,等.输电塔T形组合角钢加固构件承载性能试验研究[J].工业建筑,2018,48(12):181-186.
SUN Qigang,WU Jian,LIU Haitao,et al.Experimental research on bearing capacity of T-section retrofitting angles of transmission tower[J].Industrial Construction,2018,48(12):181-186.
[13]张 戬,杨 正,谢 强.输电塔T形组合角钢加固方法试验研究[J].工业建筑,2019,49(4):37-43.
ZHANG Jian,YANG Zheng,XIE Qiang.Experimental research on reinforcement method of transmission tower with T-shaped combine angles[J].Industrial Construction,2019,49(4):37-43.
[14]刘 翔,庄志伟,江巳彦,等.输电铁塔新型加固方式的试验研究[J].钢结构,2018,33(11):113-116.
LIU Xiang,ZHUANG Zhiwei,JIANG Siyan,et al.Experimental research on new strengthening method for transmission tower[J].Steel Construction,2018,33(11):113-116.
[15]曹现雷,徐 勇,郝际平.Q460高强角钢轴心受压构件极限承载力试验研究[J].土木建筑与环境工程,2018,40(6):146-152.
CAO Xianlei,XU Yong,HAO Jiping.Experimental analysis on ultimate bearing capacity of Q460 high-strength angle members under axial compression[J].Journal of Civil,Architectural & Environmental Engineering,2018,40(6):146-152.
[16]顾伟华,张大长,曹世山.输电铁塔单角钢轴压承载力计算公式及试验研究[J].建筑钢结构进展,2020,22(1):78-84.
GU Weihua,ZHANG Dachang,CAO Shishan.Analytical and experimental investigation on axial compression capacity of single angle steel for transmission line tower[J].Progress in Steel Building Structures,2020,22(1):78-84.
[17]LIANG G,WANG L T,LIU Y H,et al.Mechanical behavior of steel transmission tower legs reinforced with innovative clamp under eccentric compression[J].Engineering Structures,2022,258:114101.

相似文献/References:

[1]陈 正,唐可人,周 强,等.风荷载作用下输电塔极限承载力和失效模式计算模型[J].建筑科学与工程学报,2018,35(02):47.
　CHEN Zheng,TANG Ke-ren,ZHOU Qiang,et al.Calculation Models of Ultimate Bearing Capacity and Failure Modes for Transmission Tower Under Wind Load[J].Journal of Architecture and Civil Engineering,2018,35(05):47.

备注/Memo

备注/Memo:

收稿日期:2023-09-17
基金项目:国家自然科学基金项目( 51978570)
作者简介:章东鸿(1972-),男,正高级工程师,E-mail:zhangdonghong@gedi.com.cn。
通信作者:孙 清(1970-),男,工学博士,教授,博士生导师,E-mail:sunq@mail.xjtu.edu.cn。

常用功能

更新日期/Last Update: 2024-09-30