Mechanical Research Of FRP Composite Cross ARM System Subjected To Multidirectional Loads

In the structure of power transmission tower,cross arm is a very important sub structure or component and it is important parts of the power transmission tower in anisotropic thread connection.Based on FRP composite materials,instead of the traditional materials of transmission tower,which can significantly improve the traditional material transmission tower appeared all kinds of problems.But most of the domestic scholars and engineering technicians on the composite cross arm research is basically based on finite element simulation and theoretical analysis methods,the composite cross arm design and mechanical properties are analyzed and few scholars are studied by means of experimental method,so income analysis results are certain deviation,thereby affecting the popularization and application in the construction of power transmission tower cross arm on composite materials.This paper introduced the FRP composite materials on the cross arm on application present situation and significance of the research and describes FRP material constitutive relationship and cross arm system in static analysis of theoretical knowledge,which to 330 kV transmission line engineering of FRP composite transverse load system for research object and selected selective transmission tower structure in the typical B and B1 of the cross arm system tull-scale specimens were carrying capacity overload test and based on through analysis of the B1 of the cross arm system of bearing capacity and deformation properties ANSYS15.0 finite element software.The test cross arm system by the rallying point of the load and displacement between a linear variation,test the data in the graph curve has no obvious mutation or inflection point,indicating that the FRP composite cross arm system under multi load in elastic state and good mechanical performance.The bonding between the FRP casing and the steel casing is firm,and the two party has not appeared the phenomenon of debonding or relative slip,and the load transfer performance is good.Under the multi direction load,only in the FRP composite material surface in the slight tearing phenomenon,the overall polymerization of FRP material is good,can resist the external load.Using ANSYS finite element software on the B1 phase FRP composite cross arm system is analyzed with numerical simulation,and considering the contact problem of FRP pipe and steel pipe,according to test loading system in the finite element simulation to create the corresponding load step file to solve the load model.Eventually it reached the deformation characteristics of the cross arm system,it should stress results and test results show that the acquired data reliability,so as to provide a reliable basis for the practical engineering.