Optimization Analysis And Numerical Simulation Of Large Bridge Structure Based On ANSYS

With the development of China’s national economy and strong investment of nationalinfrastructure construction, Nowadays Engineering structures appear the Phenomenon ofLarge volume,ultra height, intricacy of building structure, diversification of visual effects,ahead of the design ideas (mainly current design level beyond the level of theoreticalresearch, a large number of super-regulatory buildings came into being).The way tosolve these difficulties are the accumulation of experience in engineering and raise thelevel of theoretical research.In specific complex engineering,the numerical simulationanalysis of engineering structures is one of the key technologies of complex structuraldesign and forming.At first,This paper expounded the development process and the Research status of thenumerical simulation;Summarized the characteristics and difficulties of the numericalsimulation of complex structures.Then combining with engineering examples(fasting rigidframe bridge on Guizhou Beipan River and cable-stayed bridge on Zhaoqing River),madea numerical simulation analysis of specific projects in ANSYS.Numerical simulationresults and specific project implementation process shown that the method was effectiveand the result was reasonable to handle large complex bridge structures of local modelnumerical simulation. The main contents of the thesis is as follows:Numerical Simulation study of reasonable angle of hollow district of hollow rigidframe Beipanjiang bridge used super beam elements in ANSYS.obtained the mainparameters of the fasting district under the state of cantilever construction. the length ofthe horizontal section of hollow district is about45meters, when Angle α between thelower chord and the pier is approximately53°to60°,the mechanical properties of thehollow district are relatively best.While taking into account the construction sequence,introduced the method of linearprogramming,to ensure linear session of the structure,preferred buckle Cable Force of theconstruction phase of Beipanjiang. The value of the single cable force of optimization to Design Institute of the maximum deviation is+45.75%, the smallest deviation is-0.22%,the deviation of total cable force is+1.80%. As we can be seen from the comparison of theresults of the total cable force,Under Condition,Using linear programming principles tooptimal Selection is feasible.analyzed local stress of the Block0of the cable-stayed bridge in a particular state.successfully deal with load boundary by using rigid unit and summarize the solidmodeling techniques and the problem of processing methods of the complex reinforcedstructure model.A brief study of the temperature load three processing methods of the complexstructure and part of the factors affecting the temperature load effects in ANSYS.Investigation of Temperature stress, this paper Obtained that the main factors affecting thetemperature effect are as follows:mode of temperature gradient,the form and the value ofthe temperature values;geometry of the structure;distance;constraint and etc.