建筑结构学报2018，Vol.39Issue(5)：146-155,10.DOI:10.14006/j.jzjgxb.2018.05.019
偏心受压单角钢构件力学性能试验研究
Experimental study on mechanical behavior of single angle under eccentric compression
摘要
Abstract
In order to study the mechanical properties of the steel single angle attached by one leg in transmission tower,a total of 48 steel equal-leg angle and 62 unequal-leg angle specimens were tested on knife-edge bearing which is parallel to the leg of angle. The effects of gusset plate thickness and bolts number on bearing capacity were analyzed. The buckling modes,ultimate bearing capacity and deformation performance of the steel angle were investigated and compared with various codes. According to the test results,the buckling modes are local buckling when slenderness ratio is less than 35 for equal-leg angle and 40 for unequal-leg angle,otherwise the buckling modes are mainly flexural buckling or flexural-torsional buckling. It also shows that an increase in eccentricity results in a reduction in ultimate load. However,the effect of eccentricity could be ignored when the slenderness ratio is more than 175 for equal-leg angle or 150 for unequal-leg angle. The bearing capacity of equal-leg angle is larger than that of unequal-leg angle with the same length,and the difference decreases with the increase of slenderness ratio. The bending axis of specimen moves from parallel axis to minor axis as the slenderness ratio increases. The stability coefficients from test results are higher or in some cases are lower than those from the codes,so that the bearing capacity should be calculated by the practical bending axis. For the angle steel on knife-edge bearing,the limit of the plate width-thickness ratio should be less than that in GB 50017-2017 and DL /T 5154-2012.关键词
不等边角钢/单边连接/偏心受压/静力试验/稳定承载力Key words
unequal-leg angle/connected by one leg/eccentric compression/static test/stability bearing capacity分类
建筑与水利引用本文复制引用
李正良,李妍,刘红军,大崎纯,施菁华..偏心受压单角钢构件力学性能试验研究[J].建筑结构学报,2018,39(5):146-155,10.基金项目
国家自然科学基金中日国际合作项目(51611140123),国家自然科学基金青年科学基金项目(51508054),重庆市基础与前沿研究计划项目(cstc2015jcyjA00041). （51611140123）
