特高压变电站构架节点半刚性影响研究  

Research on semi-rigid performance of frame in UHV substation

作　　者：翟彬[1] 王慧慧[1] 商文念[1] ZHAI Bin;WANG Hui-Hui;SHANG Wen-Nian(Shandong Electric Power Engineering Consulting Institute Co., Ltd., Jinan 250013,China)

机构地区：[1]山东电力工程咨询院有限公司,济南250013

出　　处：《黑龙江大学工程学报》2020年第1期21-27,共7页Journal of Engineering of Heilongjiang University

基　　金：山东电力工程咨询院有限公司科技项目基金资助(37-2018-24-K0005);国家重点研发专项课题(2018YFC0705703)。

摘　　要：为了对特高压1000 kV出线构架节点刚度设计,开展了考虑节点半刚性非线性分析及其对构架力学性能的影响研究。建立了节点的数值仿真模型;对构架中的节点进行分类,并通过非线性有限元方法研究了各类节点的破坏机理及其弯矩-转角曲线;将弯矩-转角曲线应用于连接节点,建立半刚性出线构架有限元模型,研究半刚性节点构架的受力性能,并对比了半刚性节点构架和刚性节点构架在设计荷载和极限荷载下的结构响应。研究发现设计荷载下半刚性节点构架的杆件最大轴力比刚性构架大10.9%,刚性节点构架的极限承载力是半刚性节点构架的2.3倍;随着节点刚度的增加,构架极限承载力呈非线性增加。In order to design joint stiffness UHV 1000 kV outgoing line frame(OLF1000),the semi-rigid non-linear analysis of joints and its influence on the mechanical properties of OLF1000 are studied.Firstly,the FE models of different joints were established.Additionally,joints in OLF1000 are classified,and failure mechanism and moment-rotation curves of all kinds of joints are analyzed by nonlinear finite element method.Moreover,the moment-rotation curves are applied to the connection joints to establish the FE model of semi-rigid OLF1000,and the mechanical performance of the semi-rigid-joint frame is studied.Furthermore,structural responses of the semi-rigid frame and rigid-joint frame under the design load and the ultimate load are compared.It is found that the maximum axial force of members of semi-rigid-joint OLF1000 under design load is 10.9%larger than that of rigid-joint OLF1000,and the ultimate bearing capacity of rigid-joint OLF1000 is 2.3 times of that of semi-rigid-joint OLF1000.Moreover,with the increase in joints stiffness,the ultimate bearing capacity of OLF1000 increases nonlinearly.

关 键 词：1000 kV构架 半刚性节点 弯矩-转角曲线 非线性分析 

分 类 号：TU391[建筑科学—结构工程]