Study On Bolted Joint Slippage And Influence Factors In Transmission Tower

Electric power is a kind of high efficient and clean energy,because of its advantages of transmission speed and cost,it has become an indispensable and important energy source for the industrial production and human life.Transmission tower is an important part of the power grid,it plays a decisive role in the safe operation of the power grid.The transmission tower is usually connected with common bolts,bolt pre tightening force is small.The slide is easy to occur between the connecting pieces.Bolted joint slippage plays an important role in the performance of transmission tower structure.In recent years,with the increase of the transmission voltage level,the size and scale of the transmission tower will be increased.The influence of bolted joint slippage is more significant,which puts forward higher requirements to the design of transmission tower.In this paper,we aimed at the typical bolt connection node of transmission tower.Based on four parameters of bolt connection slip model,analysis the influence of node data on the pressure performance of the hole wall,include the margins of the bolt hole,the end distance and the thickness of plate.The influences of various factors on the model parameters are given.Determine the accessor methods of each parameter.Based on semi-rigid nodes in the structure of the component method of thought,The model of component method is established for typical bolted joints,and the load displacement curve of bolted joints is obtained.To complete the full size of the bolt connection node experiment,established the finite element model of bolt connection nodes.Compared with the experimental results,the finite element simulation results and the calculation results of bolt connection based on component method,the results show that the model proposed in this paper can describe the slip process of bolt connection well.