- 摘 要
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（1 華南理工大學土木與交通學院，廣州510641； 2中國能源建設集團廣東省電力設計研究院有限公司，廣州510663）
［摘要］角鋼輸電塔在強風中容易發(fā)生倒塌事故，在臺風多發(fā)區(qū)，往往需要對輸電塔進行加固補強。針對角鋼輸電塔的特點，提出一種新型夾具的主材加固方法。通過對一組未加固的角鋼試件以及夾具布置和預緊力等各不相同的三組加固后的十字截面角鋼試件進行試驗，研究夾具數(shù)量和布置、螺栓預緊力等對試件承載力和傳力效率的影響。試驗結(jié)果表明，加固后的試件承載力有較大提高； 試件的承載力和傳力效率隨夾具數(shù)量和預緊力的增加而增加。最后根據(jù)鋼結(jié)構(gòu)加固規(guī)范和試驗結(jié)論，提出了新型夾具加固方式的設計建議。
［關(guān)鍵詞］十字截面； 夾具； 輸電塔； 傳力效率； 預緊力
中圖分類號：TU391文獻標識碼：A文章編號：1002-848X(2020)06-0095-04
Tests and design suggestion on a new type of paralleling component method in reinforcing angle steel transmission tower
Su Ziwei1, Li Minsheng2, Yan Bin2, Liu Xiang1, Huang Yansheng1
(1 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641， China； 2 China Energy Construction Group Guangdong Electric Power Design & Research Institute Co., Ltd.，Guangzhou 510663， China）
Abstract:Angle steel transmission tower is prone to collapse in strong wind. In typhoon-prone areas, it is often necessary to strengthen and reinforce the transmission tower. In the light of the characteristics of angle steel transmission tower, a new method in reinforcing transmission tower leg by using new type of fixture was put forward. Tests of a set of unreinforced angle steel test pieces and three different sets of reinforced cross-section angle steel test pieces with different fixture arrangements and pre-tightening forces were carried out, the influence of the number and arrangement of fixture and the pretension of bolts on the bearing capacity and transfer efficiency of specimens were studied. The test results show that the bearing capacity of the reinforced specimens is greatly improved. The bearing capacity and transfer efficiency of specimens increase with the number of fixtures and pretension. Finally, according to the steel structure strengthening code and the test conclusion, the design suggestion of new fixture reinforcing method is suggested.
Keywords:cross-section; fixture; transmission tower; transfer efficiency; pretension
作者簡介：蘇子威，碩士，Email:suziwei1992@163.com。
