| Due to the long-span bridges are complex structures, design parameters and the difference of actual constructions,the impacts of environmental impact and theoretical analysis or experimental error.because this impacts,the actual construction process of bridges in each state is difficult to maintain consistency with the design of state.the emergence of a variety of error parameters is a certain probability,and the emergence is a lower possibility.at the same station in the construction and use of a bridge not every error paraments occurred at the same time.and the different parameters impact on the state of the bridge are different.therefore,we must identify the error parameters.traditional certainly analysis methods can't reflect import structure's important characteristics accurately.consider the uncertainties of the actual engineering is a great significance to random mechanical of analysis of engineers.In this paper,using the random simulation methods that combined with the Monte Carlo method and the finite element method.we use MIDAS software to analysis the steel truss bridge on the dead load weight,the construction states and using states's to identify the error parameters.based on the sensitivity analysis to the various of parameters, sum up,summarize and definition of the bridge parameters,and analysis of the random parameters,and we give the random variables of general distribution(frequency,mean,standard deviation);using ANSYS to analysis the phases of the parameters with stochastic simulation.we statistics the various parameters that caused by shrinkage and creep.and determine the effects of shrinkage and creep of the random parameters .we have separated the construction phase and we also have a random simulation to PC continuous beam bridge's stress and displacement that caused by the effects of the shrinkage and creep.using the Latin hypercube sampling method and importance sampling method to determine the important parameter.
|
PDF Full Text Request