建筑结构学报2017，Vol.38Issue(5)：27-34,8.DOI:10.14006/j.jzjgxb.2017.05.004
超高压变电构架钢管混凝土Y型相贯节点平面内受弯性能研究
In-plane bending behavior of Y-joints in concrete filled tubular truss structures of EHV substation
摘要
Abstract
Based on the engineering background of the concrete filled tubular truss structures of 750 kV EHV substation in China,three specimens of 1:2 scaled Y-joints were designed and tested subjected to in-plane bending,which included two circular concrcte-filled chords tubular Y-joints specimens with different forms of reinforcement (doubler-plate and sleeve) and a non-reinforced joint specimen for comparison.Test results indicate that the failure patterns of the reinforced joints are the branch pipe failure,which is in accord with the design concept of ‘ strongcolumn and weak-beam’.The two joint specimens with different forms of reinforcement can significantly improve the bending stiffness and bending resistance of this joint.The in-plane bending stiffness of the reinforced joints can meet the requirements of the rigid joints of the Eurcode 3,and their in-plane bending resistance can achieve the crosssection plastic resistance of branch pipe.In addition,results of the FE analysis show that thickness of the doublerplate can make the stiffness and ultimate strength of doubler-plate reinforced joints increase considerably,while the influences of the chord axial compression ratio,length and width of doubler-plate are not significant.关键词
钢管混凝土/750 kV变电构架/Y型相贯节点/静力试验/有限元分析/平面内受弯性能Key words
concrete filled tube/750 kV substation structure/Y-joint/static test/FE analysis/in-plane bending behavior分类
建筑与水利引用本文复制引用
杨超,杨俊芬,苏明周,张广平,奚增红..超高压变电构架钢管混凝土Y型相贯节点平面内受弯性能研究[J].建筑结构学报,2017,38(5):27-34,8.基金项目
国家电网公司2014年依托工程基建新技术研究项目([2014]9). （[2014]9）
