| Abstract:In the process of the construction of the catenary bridge transfer structure, in order to carry out preventive optimisation of the possible risks and errors, statistical methods are usually used to carry out risk-error analysis of the project. The elastic modulus of building materials, however, is temperature-sensitive and changes with temperature, which may lead to errors in the simulation and analysis results if this property is ignored in the assessment process. Therefore, a construction assessment method based on finite element simulation and Monte Carlo method is proposed for the construction of double-body bridge turning structure. A three-dimensional structural simulation model is constructed in large-scale finite element software, covering the constitutive model, material property parameters, mesh division and loading boundary conditions, to simulate the whole construction process; the effect of ambient temperature on the modulus of elasticity of the material is taken into account, and the model is corrected; the structural reliability parameter is calculated through the simulation, and the probability of construction risk is evaluated by combining with the Monte Carlo method; and the results of construction error analysis are obtained by the projection based on the characteristic parameters of the model. The results of simulation analysis show that the accuracy of the structural construction risk assessment of this paper's method is high, and the RMSE value of the error analysis result is only 0.08, which is able to meet the requirements of the bridge structure construction inspection. |
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