Collapse Simulation Of Transmission Tower Under Earthquake Action Based On Finite Particle Method

Simulating collapse of transmission tower under earthquake action involves complex issues including geometric nonlinearity, material nonlinearity, dynamic nonlinearity and destruction of component, etc. Traditional numerical analysis cannot simulate collapse of transmission tower under earthquake action simply. Based on the finite particle method, regarding simulation of collapse as the main line, using the MATLAB program for calculation, this paper runs static analysis and dynamic analysis under earthquake action for transmission tower and compares it with the result of traditional finite element method. Finally the collapse of transmission tower is simulated under earthquake action. And the main research work is as follows:Firstly, derive and solve the motion equation of bar element based on the finite particle method. Discuss the effect of loading speed and damping on calculation results of structure. The results show that the slower the loading speed and the higher the damp, the faster the structure reaching equilibrium.Then, establish the model of transmission tower based on the finite particle method. Run static analysis and dynamic analysis under earthquake action for transmission tower, and compare the calculation results with traditional finite element method under the same conditions. The results show that that the model of transmission tower is correct, the displacement-time and the maximum displacement of nodes is consistent by using two method, the maximum axial force is also consistent, so the dynamic response analysis under earthquake action for transmission tower proves reliable.Finally, define the failure criteria and failure modes of component and simulate collapse of transmission tower under earthquake action. The collapse of transmission tower is simulated on different earthquake peak ground acceleration. Compare collapse of transmission tower between the one-dimensional and three-dimensional input of earthquake action. The results show that the higher the earthquake peak ground acceleration the earlier the time of transmission tower staring collapse, and the shorter the duration of the collapse process. Transmission tower collapse process under three-dimensional earthquake action is more fierce and faster than under one-dimensional earthquake action.