Q420等边角钢输电塔腿轴压试验研究及数值分析  

Experimental and numerical investigation of axial compression Q420 equal angle steel legs for transmission tower

作　　者：孙立建[1] 刘云贺[1] 王媛[2] 张小刚[2] 张文静[1] 

机构地区：[1]西安理工大学土木建筑工程学院,陕西西安710048 [2]西安理工大学水利水电学院,陕西西安710048

出　　处：《西安理工大学学报》2015年第2期225-230,共6页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(51308454);陕西省自然科学基金资助项目(2013JQ7006);陕西省教育厅自然科学专项资助项目(2013JK0967)

摘　　要：为充分认识Q420高强角钢在实际输电塔架中的受力性能,对使用Q420高强角钢作为输电塔架塔腿的子结构进行了抗压试验研究。本文基于试验研究成果,考虑了试件加工及试件安装的初始缺陷对Q420高强角钢的影响,对塔腿子结构进行了有限元数值分析研究,系统探讨了塔腿子结构中Q420等边角钢的应力分布、变形特征与破坏模式、极限承载力等指标。研究结果表明：数值分析结果与试验结果具有很好的吻合程度,尤其在承载力方面,两者相差仅5%~10%;子结构中的高强角钢受压后均呈现出弯扭的失稳形式,且承载力远高于GB50017-2003《钢结构设计规范》限值,建议输电塔设计时考虑整体效应对Q420高强角钢承载力的影响。In order to fully investigate into the mechanical behavior of Q420 high strength angle steel in the actual transmission tower,the compression test research is conducted on Q420 high strength angle steel as the substructure of legs for transmission tower.On the basis of the test results,the influence of the initial defects of the test specimen during the process and installation to Q420 high strength angle steel is taken into consideration,and the finite element numerical analysis research is made of the substructure of legs for transmission tower.Such indexes as the stress distribution,deformation behaviors,failure mode and limit bearing capacity of Q420 equal angle steel in tower legs structure are systematically discussed.The research results indicate that numerical analysis results are found to be in good coincidence with test results.Particularly in bearing capacity,there is only 5%~10% of differences between the both.The high strength angle steels in substructure appear to be bending torsional buckling,and their bearing capacity is much higher than the limit values set in《Code for design of steel structures》（GB50017-2003）.Accordingly,it is suggested that when transmission tower is designed,the overall effect upon the bearing capacity of Q420 high strength angle steel be taken into account.

关 键 词：高强角钢 输电塔 子结构 极限承载力 数值分析 

分 类 号：TU391[建筑科学—结构工程]