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（1 國網(wǎng)甘肅省電力公司， 蘭州 730030； 2 中國能源建設(shè)集團(tuán)甘肅省電力設(shè)計(jì)院有限公司， 蘭州 730050； 3 西安建筑科技大學(xué)土木工程學(xué)院， 西安 710055）
［摘要］以國內(nèi)首例750kV鋼管混凝土變電構(gòu)架工程——甘肅橋?yàn)?50kV變電站為背景，進(jìn)行了4個(gè)鋼管混凝土法蘭節(jié)點(diǎn)試件在拉彎荷載作用下的單調(diào)靜力試驗(yàn)研究。此外，基于ABAQUS 6-12有限元軟件，對該鋼管混凝土法蘭節(jié)點(diǎn)的有限元建模方法進(jìn)行了闡述，并通過有限元數(shù)值分析結(jié)果與試驗(yàn)結(jié)果的對比，驗(yàn)證了建模方法的可靠性。在通過試驗(yàn)驗(yàn)證的基礎(chǔ)上，對法蘭板厚度、加勁肋高度以及螺栓邊距進(jìn)行了參數(shù)分析。結(jié)果表明：法蘭板厚度、加勁肋高度對節(jié)點(diǎn)剛度、承載力和破壞形態(tài)等受力性能有較為明顯的影響；螺栓邊距由約1-7倍螺栓直徑增加到約3-3倍螺栓直徑時(shí)，節(jié)點(diǎn)的初始剛度略有降低（約7%），而承載力變化不大。
［關(guān)鍵詞］750kV變電構(gòu)架； 鋼管混凝土； 法蘭節(jié)點(diǎn)； 試驗(yàn)研究； 有限元分析
中圖分類號：TU398-9文獻(xiàn)標(biāo)識碼：A文章編號：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
*國家電網(wǎng)公司2014年依托工程基建新技術(shù)研究項(xiàng)目。
作者簡介：宋小衛(wèi)，碩士，高級工程師，Email:tssongxw@163.com。
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