The collapse of transmission towers involves a series of complex problems, including geometric nonlinearity,material nonlinearity,\ndynamic nonlinearity, and the failure of members. Simulation of the process of collapse is difficult using traditional finite element\nmethod (FEM), which is generated from continuum and variation principle, whereas the finite particle method (FPM) enforces\nequilibrium on each point. Particles are free to separate from one another, which is advantageous in the simulation of the structural\ncollapse. This paper employs the finite particle method (FPM) to simulate the collapse of a transmission steel tower under\nearthquake ground motions; the three-dimensional (3D) finite particle model using MATLAB and the 3D finite element model\nusing ANSYS of the transmission steel tower are established, respectively. And the static and elastic seismic response analyses\nindicate that the results of the FPM agree well with those of the FEM. To simulate the collapse of the transmission steel tower, a\nfailure criterion based on the ideal elastic-plastic model and a failure mode are proposed. Finally, the collapse simulation of the\ntransmission steel towers subjected to unidirectional earthquake ground motion and the collapse seismic fragility analysis can be\nsuccessfully carried out using the finite particle method. The result indicates that the transmission steel tower has better seismic\nsafety performance and anticollapse ability.
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