PENG Shengjiang, ZHANG Guangping, WANG Xiuli, WEI Jianmin, ZHANG Fuping, ZHU Zhongcheng. RESEARCH ON WIND RESISTANCE OF FLANGE JOINTS OF LIGHTNING ROD WITH PRESTRESSED HOOPS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(10): 109-115,121. doi: 10.13204/j.gyjzG21053120
Citation:
PENG Shengjiang, ZHANG Guangping, WANG Xiuli, WEI Jianmin, ZHANG Fuping, ZHU Zhongcheng. RESEARCH ON WIND RESISTANCE OF FLANGE JOINTS OF LIGHTNING ROD WITH PRESTRESSED HOOPS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(10): 109-115,121. doi: 10.13204/j.gyjzG21053120
PENG Shengjiang, ZHANG Guangping, WANG Xiuli, WEI Jianmin, ZHANG Fuping, ZHU Zhongcheng. RESEARCH ON WIND RESISTANCE OF FLANGE JOINTS OF LIGHTNING ROD WITH PRESTRESSED HOOPS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(10): 109-115,121. doi: 10.13204/j.gyjzG21053120
Citation:
PENG Shengjiang, ZHANG Guangping, WANG Xiuli, WEI Jianmin, ZHANG Fuping, ZHU Zhongcheng. RESEARCH ON WIND RESISTANCE OF FLANGE JOINTS OF LIGHTNING ROD WITH PRESTRESSED HOOPS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(10): 109-115,121. doi: 10.13204/j.gyjzG21053120
For the failure of lightning rod in transmission tower, an innovation connection between the lighting rod and the transmission tower was proposed based on the concept of reducing the stress amplitude of high-strength bolts and realizing double protection, namely steel strand reinforced flange joint. The finite element model was established by using the finite element software WORKBENCH. The stress and displacement were studied on two kinds of joints for lightning rods at different wind speeds and steel strand pretensions of 20 kN. The stress nephogram, streamline vector diagram,stress and displacement response of the lightning rod structure caused by fluid were expressed under the wind velocity of 5 m/s,15 m/s,30 m/s, and 50 m/s. The contrastive analysis was carried on the stress and displacement response of the lightning rod with the measured values under different loading conditions. The analysis results showed that the lightning rod was subjected to the same fluid pressure under the same load. The stress was the largest at the connection between the lightning rod and the herringbone column. The research results showed that the new lightning rod could significantly reduce the peak values compared with the conventional lightning rod. It was more effectively in reducing the stress peak values on the connecting bolts so as to ensure the safe use of the lightning rod. The higher the wind speed, the more obvious the effect.
WANG Y Q, ZONG L, SHI Y J.Bending Behavior and Design Model of Bolted Flange-Plate Connection[J].Journal of Constructional Steel Research, 2013, 84:1-16.
[3]
BLACHOWSKI B, GUTKOWSKI W.Effect of Damaged Circular Flange-Bolted Connections on Behaviour of Tall Towers, Modelled by Multilevel Substructuring[J].Engineering Structures, 2016, 111:93-103.
[4]
ABID M, CHATTHA J A, KHAN K A.Finite Element Analysis of a Gasketed Flange Joint Under Combined Internal Pressure and Thermal Transient Loading[C]//ASME 2007 Pressure Vessels and Piping Conference.American Society of Mechanical Engineers Digital Collection, 2007:261-267.
[5]
PARNAUDEAU P, CARLIER J, HEITZ D, et al.Experimental and Numerical Studies of the Flow Over a Circular Cylinder at Reynolds Number 3900[J].Physics of Fluids, 2008, 20(8):85-101.
[6]
MARA T G, HONG H P.Effect of Wind Direction on the Response and Capacity Surface of a Transmission Tower[J].Engineering Structures, 2013, 57:493-501.
[7]
YANG S C, HONG H P.Nonlinear Inelastic Responses of Transmission Tower-Line System Under Downburst Wind[J].Engineering Structures, 2016, 123:490-500.
[8]
ZHANG J, XIE Q.Failure Analysis of Transmission Tower Subjected to Strong Wind Load[J].Journal of Constructional Steel Research, 2019, 160:271-279.