（1 国网甘肃省电力公司， 兰州 730030； 2 中国能源建设集团甘肃省电力设计院有限公司， 兰州 730050； 3 西安建筑科技大学土木工程学院， 西安 710055）

［摘要］以国内首例750kV钢管混凝土变电构架工程——甘肃桥湾750kV变电站为背景，进行了4个钢管混凝土法兰节点试件在拉弯荷载作用下的单调静力试验研究。此外，基于ABAQUS 6-12有限元软件，对该钢管混凝土法兰节点的有限元建模方法进行了阐述，并通过有限元数值分析结果与试验结果的对比，验证了建模方法的可靠性。在通过试验验证的基础上，对法兰板厚度、加劲肋高度以及螺栓边距进行了参数分析。结果表明：法兰板厚度、加劲肋高度对节点刚度、承载力和破坏形态等受力性能有较为明显的影响；螺栓边距由约1-7倍螺栓直径增加到约3-3倍螺栓直径时，节点的初始刚度略有降低（约7%），而承载力变化不大。

［关键词］750kV变电构架； 钢管混凝土； 法兰节点； 试验研究； 有限元分析

中图分类号：TU398-9文献标识码：A文章编号：1002-848X(2019)10-0058-06

Performance study on the  concrete filled tubular   flange joint of 750kV substation truss structures under axial tension and bending moment

Song Xiaowei1, Zhang Guangping2, Li Xiaoli1, Wang Shenggui1, Chang Haojing1, 

Zhang Jinsheng1, Yang Junfen3, Yang Chao3

(1 State Grid Gansu Electric Power Company, Lanzhou 730030, China; 2 Gansu Electric Power Design Institute Limited Company of China Energy Construction Group, Lanzhou 730050, China；3 School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China)

Abstract:Four concrete filled tubular(CFT) flange  joint specimens were designed and applied the monotonic static experimental study under the axial tension and bending moment based on the engineering background of the first  750kV CFT substation truss structure in China named Qiaowan substation in  Gansu province. Besides, the finite element model of this  CFT flange joint was elaborated by ABAQUS 6-12 and the reliability of this modeling method was tested according to the contrast of finite element analysis and experiment. On the foundation of test, the parameter analyses including thickness of flange plate, height of stiffening rib and edge distance of bolt were conducted. The results show that  thickness of flange plate, height of stiffening rib have a striking influence on joint stiffness, bearing capacity and failure form. And when the edge distance of bolt increases from 1-5 times bolt diameter to 3-3 times, the initial stiffness of joint decreases slightly (7% approximately)and bearing capacity has no change nearly.

Keywords:750kV substation truss structure; concrete filled tubular; flange joint; experimental study; finite element analysis

*国家电网公司2014年依托工程基建新技术研究项目。

作者简介：宋小卫，硕士，高级工程师，Email:tssongxw@163.com。