摘要
工程实际中输电塔角钢往往发生失稳破坏,因此,研究输电塔角钢的抗失稳能力显得尤为重要。通过比较60°角钢和90°角钢截面的两主惯性矩之比,可知60°角钢截面两主惯性矩相差不大,故其截面的抗失稳能力可以得到充分发挥,且60°角钢作为主材不仅可以解决三角形电塔主材与斜材连接不便的问题,而且其抗失稳能力可以在三角形电塔中充分发挥。因此从理论上比较了60°角钢三角形电塔和90°角钢四边形电塔的抗失稳能力,并通过模型试验、有限元数值模拟进行验证。研究结果表明,在相同用材情况下,60°角钢三角形电塔在抗压、抗弯及抗扭承载能力方面远比90°角钢四边形电塔的承载能力高,且整体稳定性也明显优于90°角钢四边形电塔。
In engineering practice,angle steel of steel pylons often faces instability damage,so it is important to study the anti-instability ability of the angle steel of steel pylons.By comparing two principal inertia moments in transverse cross-section of 60°angle and 90°angle steels,two principal inertia moments in transverse cross-section of 60°angle steel are similar,so the anti-instability ability of the cross-section can get into full use,and 60°angle steel was used as primary-material,which can solve the connection problem between primary-material and inclined-bar in triangle steel pylons,and its anti-instability ability can be fully developed in triangle steel pylons.Therefore,the anti-instability abilities of the triangle steel pylon of 60°angle steel and the quadrilateral steel pylon of 90°angle steel were compared,and certified by the model test and the finite element numerical simulation.The results show that under condition of the same material consumption,the triangular steel pylon of 60°angle steel is much higher than the quadrilateral steel pylon of 90°angle steel in the compression,bending and torsional bearing capacity,and the overall stability of the triangular steel pylon of 60° angle steel is also better than that of the quadrilateral steel pylon of 90°angle steel.
作者
赵腾飞
杨凤
张雷
黄模佳
Zhao Tengfei;Yang Feng;Zhang Le;Huang Mojia(Institute of Engineering Mechanics,Nanchang University,Nanchang 330031,China;School of Civil &Architecture Engineering,East China Institute of Technology,Nanehang 330013,China;School of Civil Engineering and City Construction of Jiujiang University,Jiujiang 332005,China)
出处
《建筑结构》
CSCD
北大核心
2018年第22期33-41,66,共10页
Building Structure
基金
国家自然科学基金项目(11572147,51268043,51568046)
江西省教育厅科学技术研究项目(GJJ150575)
江西省自然科学青年基金(20161BAB216142)
九江学院校级科研资助项目(8820109)
关键词
60°角钢
90°角钢
抗失稳能力
主惯性矩
模型试验
60° angle steel
90°angle steel
anti-instability ability
principal inertia moment
model test
