Analysis On The Global Ultimate Capacity Of The New FRP Rush Repair Tower

Electric transmission line is most seriously influenced by external world and the nature.Along with the fast speed development of global economy,once an accident of collapse happened,it would bring severe influence and threat to the stable safety in operation,of electric power system and power supply,which would result in severe economic losses.Therefore,a new type of light multi-purpose rush repair tower made by FRP(glass fiber reinforced plastics)who is transported and assembled easily,can effectively improve the speed of repairs,and draw a large income from the multi-purpose investment returns.This is needed urgently in the repair of in the current transmission line.Therefore,the mechanical behavior of the FRP material and the ultimate load capacity analysis of the rush repair tower structure is important both in theory and in engineering practice.The existing test data is summarized in this paper,and the mechanical behavior of the FRP material is systematically studied.As it is used in member structures,the stability of components of the rush repair tower is very important.Through the FRP angle material test and the application of the theory of the existing steel structure,considering the difference between the FRP materials and steel materials,parameters are amended and the FRPλ-φcurves are drawn.The paper also makes a regression analysis of better data in elastic stage of the material,and gets the elastic modulus E.At the same time,referring to the original research data and the test data,the paper draws the stress-strain relationship curve of the FRP material and lays the foundation and provides basic reference data for the study and design of structures made by the FRP material.A method of FEM(finite element method)analysis is presented in this thesis to study the global ultimate capacity of the rush repair tower.The spatial model space of 220 kV new FRP rush material repair tower is established by the structural analytical software SAP2000.Considering of geometric nonlinearity of the structure,the paper studies the mechanical properties of the structure under the large deformation; considering the linear materials and study the mechanical properties of the global structure of the rush repair tower in this paper,get the stress,displacement,and other relevant parameters of the rush repair tower under the lateral load.In this dissertation,on the basis of reviewing the study and design data available,the author analyzes the rush repair tower structure theory comprehensively,and studies the rush repair tower structure performance systematically.And referring to the design theory of the concrete poles cable structure,simplified calculation of the rush repair tower is done,and the calculation method applied to the rush repair tower structure is put forward, and by comparing the results of finite element analysis with the calculation results,the simplify calculation reasonableness is tested.