Field measurement and quasi-static studies on the gust response of transmission tower
LI Hong-nan; BAI Hai-feng;YI Tinghua;REN Liang
(1.State key laboratory of coastal and offshore engineering, Dalian university of technology, Dalian 116024, LiaoNing Province, China 2.school of civil and safety engineering,Dalion Jiaotony University)
Abstract：In order to clarify the variational rules of dynamic properties and gust response factors of transmission tower, the synchronous measurement of the fluctuating wind speed acting on the just built transmission tower, together with its accelerations responses located at different parts and the base bending moments were carried out under field wind condition. The dynamic properties of transmission tower obtained by test were compared with those by mode identification method and finite element method respectively. The gust response factors based on the top displacement and base bending moment were calculated respectively with direct analytical method using test data and various quasi-static methods. The results show that: the dynamic properties obtained by the mode identification method based on measurement data are in good agreement with those by finite element method, which indicates that the numerical results using finite element method are correc. The changing rule of gust response factors obtained by the measurement data analysis is consistent with that by the quasi-static analysis, and is related to the mean velocity and turbulence intensity of fluctuating flow. The gust response factors based on bending moment are almost identical by use of various methods, the differences among them do not exceed 5%. In turn, the gust response factors based on measurement displacement analysis differ from those calculated by quasi-static method, and it is necessary to further identify and verify its causations.
李宏男;白海峰;伊廷华;任亮. 输电杆塔阵风响应实测与准静态设计研究[J]. , 2010, 29(8): 17-21.
LI Hong-nan;BAI Hai-feng;YI Tinghua;REN Liang. Field measurement and quasi-static studies on the gust response of transmission tower . , 2010, 29(8): 17-21.
2010, Vol. 29 
