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(1 南京工業(yè)大學(xué)土木工程學(xué)院， 南京 211816； 2 中能建江蘇省電力設(shè)計(jì)院， 南京 211102；

3 河海大學(xué)土木交通工程學(xué)院， 南京 210098)

［摘要］探討輸電鋼管桿橫擔(dān)抗彎強(qiáng)度及端部連接角焊縫抗彎強(qiáng)度的設(shè)計(jì)方法，開展3個(gè)相同規(guī)格設(shè)置不同加勁肋橫擔(dān)抗彎承載力特性試驗(yàn)、非線性有限元模擬和理論分析，探討高壓輸電線路鋼管桿截面為多邊形的錐形橫擔(dān)抗彎承載力試驗(yàn)和設(shè)計(jì)理論。以錐度、徑厚比為變化參數(shù)對(duì)錐形鋼管橫擔(dān)進(jìn)行一系列有限元模擬，并結(jié)合試驗(yàn)結(jié)果提出適合此類橫擔(dān)的抗彎承載力計(jì)算公式。研究結(jié)果表明：加勁肋對(duì)錐形鋼管橫擔(dān)的極限承載力幾乎沒(méi)有影響，但能有效減小焊縫受力，避免焊縫的撕裂；隨著錐度的降低，錐形鋼管橫擔(dān)抗彎承載力降低，建議錐度取0-6；采用Q345鋼材時(shí)，錐形鋼管橫擔(dān)徑厚比限值不應(yīng)超過(guò)120。提出一個(gè)適用于錐形鋼管橫擔(dān)抗彎承載力計(jì)算公式，并與有限元模擬值進(jìn)行對(duì)比，可為工程設(shè)計(jì)提供參考。

［關(guān)鍵詞］錐形鋼管橫擔(dān)； 抗彎承載力試驗(yàn)； 設(shè)計(jì)理論； 有限元模擬； 抗彎承載力計(jì)算公式

中圖分類號(hào)：TU392-3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)02-0033-06

Test and design theory research on the flexural capacities of polygonal tapered cross arms for steel tube pole in the high voltage transmission line

Ding Yang1， Zhang Dachang1， Tan Lei2， Li Buhui3

（1 Department of Civil Engineering, Nanjing University of Technology, Nanjing 211816, China; 2 China Energy Engineering Group Jiangsu Electric  Power Design Institute, Nanjing 211102, China; 3 partment of Civil and Transportation  Engineering,  Hehai University, Nanjing 210098, China)

Abstract:The design methods of the flexural strength of tapered cross arms for steel tube pole and fillet weld connecting end parts were discussed and three tapered cross arms with same specifications but different stiffener were used to conduct tests including flexural strength characteristics test,  nonlinear finite element simulation and theoretical analysis, to discuss test and design theory on the flexural capacities of polygonal tapered cross arms for steel tube pole in the high voltage transmission line. A series of finite element simulations were carried out on the polygonal tapered cross arms for steel tube pole with the change parameters of the taper degree and diameter thickness ratio. The calculation formula of the flexural strength of the cross arm was put forward. The results show that the stiffener has almost no influence on the ultimate bearing capacity of tapered cross arms for steel tube pole, but it can effectively reduce weld stress and avoid weld tearing. With decrease of taper degree, flexural capacity of tapered cross arms for steel tube pole decreases and recommended taper degree is 0-6. With adoption of Q345 steel, limit value of diameter thickness ratio of tapered cross arms for steel tube pole should not be more than 120. A calculation formula was proposed to calculate flexural strength of tapered cross arms for steel tube pole and it can be compared with the finite element simulation, which can provide reference for engineering design.

Keywords:tapered steel cross arm joint; flexural capacity test; design theory; finite element simulation; flexural capacity calculation formula

*2014年江蘇省科技廳前瞻性聯(lián)合研究（BY2014005-11）。

作者簡(jiǎn)介：丁陽(yáng)，碩士，助理工程師, Email: 15151812983@163.com。