摘要
依托工程,对悬索拉线塔变截面格构柱进行稳定极限承载力分析。首先对变截面格构柱进行特征值屈曲分析,获得前2阶屈曲模态,分析屈曲模态,为主柱施加初弯曲提供依据;用屈曲分析得到的临界荷载反算出格构柱的长细比,与《钢规》中的换算长细比计算公式计算结果进行对比;然后考虑材料弹塑性和格构柱的几何非线性,对结构进行ANSYS大挠度弹塑性分析,得到格构柱真实的稳定极限承载力,采用《钢规》中公式分别按照a,b和c类截面求得相应稳定极限承载力,并与ANSYS值进行对比分析。最后,分析初始缺陷大小对格构柱稳定极限承载力的影响进行分析。
Based on the engineering,it analyzes the stability capacities of suspension guyed tower＇ s tapered lattice column. First,this paper goes on the Eigen value buckling analysis for tapered lattice column to get the first two buckling modes,and analyzes the buckling modes to provide the basis for applying initial bending to the column. And it compares the slenderness ratios of the columns calculated by critical load received after buckling analysis with the ones calculated according to the slenderness ratios calculation formula in＂the Rules＂. Then,considering the elastic-plastic material and geometric nonlinear of columns,it goes on the large-deflection and elasticplastic analysis for the structure by ANSYS to receive the real global stability capacities of the lattice columns,which are compared with the values obtained respectively according to a,b,and c-section by using the formula in＂the Rules＂. Finally,it also analyzes the influence of initial defection on global stability capacities.
出处
《电力科学与工程》
2015年第12期47-51,共5页
Electric Power Science and Engineering
基金
国家自然科学基金(51408221)
关键词
变截面
换算长细比
长度换算系数
稳定承载力
tapered section
conversion slenderness ratio
length conversion coefficient
stability load-carrying capacity
作者简介
赵东东（1990-），男，硕士研究生，主要从事输电线路结构设计研究，E—mail：hdzhaodongdong@163．com。
