Finite Element Program Design And Application Study Of Construction Control For Long-span Suspension Bridge

Long-span suspension bridge require calculated data to provide theoretical support of its construction,which requires a software that can calculate the necessary various parameters of the suspension bridge suspension bridge instead of human labor. The author of this paper based on the long-span suspension bridge is a typical system of flexible architecture,and the geometric nonlinearity when it suffer stress.In studying some of the more advanced theory and principles calculations program and the principle of compilingof suspension bridge, designed a program which consider the geometric nonlinearity to calculation analysis of long-span suspension bridge program.This program divided the suspension bridge into girder unit、bar unit, cable uni,calculated the force and displacemen of the rod end which guide the construction control by selecting the appropriate mode of displacement and the geometric nonlinearity strain-displacement displacement relationship.In this paper, the main work content is as follows:(1) This paper introduces the development situation and the classification of suspension bridges, the applicable scope and the development of the theory of computing process;Introduces the basic ideas of the finite element analysis and its advantages in the calculation;Introduces the reason why suspension bridges exhibit geometric nonlinearity and its factors.Introduces how to derivation stiffness matrix of the girder unit、bar unit, cable unit,and the way to solving the equation of the geometric nonlinearity.(2)Briefly describes the construction process of suspension bridges; discusses how to simulation and calculation for main structure of suspension bridges under the analysis method of he finite element analysis method.expatiates on how to solve the geometric linear and internal force under the dead load;carried out the geometric nonlinearity of stiffening girder hoisting process of suspension bridges.Analyzing the formation process of suspension bridge structure.(3)Introduces the using fortran language form and the design of suspension bridge construction control calculation procedure design process according to the theory of finite element analysis.Expounds the long-span suspension bridge construction control of the finite element program specific design ideas and design process,carried on the calculation and analysis combined with an engineering example,and the existing analysis of suspension bridges. Since the program is not actually completely prepared,In the end i use the existing suspension bridge engineering calculation software midas to analysis a real suspension engineering calculation, then compare with the references in the calculations results, corroborated the results from the side.