Research On Mechanical Properties Of Transmission Tower Bolted Connection

In the process of power transmission, power transmission tower plays the important role of bearing. The node of transmission tower is tightened by bolt, due to the characteristic of its highness and flexibility, the structures are sensitive to the action of wind. Under the action of strong wind, some bolts on the transmission tower will become loosing, which will reduce the capacity of the structure, it occurs to suffer from the collapse of transmission tower. With the increase of the voltage level of transmission lines and the construction of high voltage and extra high voltage lines in China, the number of transmission tower is also gradually increasing. So the analysis of the transmission tower bolt connection nodes in mechanical properties under dynamic loading, to make a study of its internal rules for the transformation of the transmission tower and the construction of the entire transmission system has important meaning.In this paper, the representative node construction as the breakthrough point of the several different bolt connection modes were studied. First, bolt connection of different structure gap, shear slip process and four deformation processes under axial load are described in detail in the paper. The simplified model of bolt connection and the Impact Study of the model parameters are carried out. Secondly, the application and monitoring method of bolt connection preload are listed. According to the experimental results and experimental conditions, the monitoring scheme of bolt connection preload, the experimental equipment, model selection and parameter calculation are determined.Finally, the static and dynamic mechanical properties of the single and double bolt connection node are tested. and their friction differences are analysised. Verifying the theory, the theory of the verification is fully studied. In this paper, the theoretical and experimental research is meaningful for practical engineering.