Parameterized Modeling Of Continuous Rigid Frame Bridge And Analysis Method Study

With the rapid development of computer technology, the general finite elementanalysis software has obtained the full development in recent years,so has aspect ofstructure analysis and calculation; In bridge engineering practice, the MIDAS/CIVILand Dr Bridge software in structural calculation analysis has already been greatly used,but as for the requirement of accuracy of the structural analysis,the former softwaremodeling method adopted by the beam element and truss element is difficult to meet theprecision of modern construction, and some entities analysis softwares such asMIDAS/FEA and ABAQUS is too complicated to obtain a bridge structure solid model.The method of modeling assistant can greatly simplify the modeling process inMIDAS/CIVIL, only through inputting some of the parameters in the dialog. The maincontent of this thesis aims at the deficiency of the finite element analysis software, andrealize the establishment of the finite element entity grid of the bridge based on a VSC++platform.To achieve the above content,we begin our theoretical study mainly from thefollowing specific aspects:Firstly,learn the process of making a dialog, set up to realize interaction betweenhuman and the machine.Users only need to input the basic parameters of the wholebridge,which can finish the modeling of arbitrary section continuous rigid frame bridgewith single box single room.Secondly, study the modeling process of MIDAS/CIVIL, MIDAS/FEA, RCF andABAQUS software, we should analysis not only the mechanical characteristics ofcontinuous rigid frame bridge but also the design requirements, learn more about thelayout and the cross section of bridge span such as girder box height, bottom thicknesschange rule and the double thin-wall pier,then carry on the comparison and analysis;Study the advantages and disadvantages of various software in modeling process,analysis the calculation of the model.Thirdly,study the change rule with the parameters of horizontal and vertical,through the understanding of the various parameters, implementation to build Bridgescross section,build the contour coordinates of each point; Study different cross-sectiongrid division method, choose the2d Delaunay triangular mesh method based on CGALby comparing; Study mapping mechanism,realize the two-dimensional mesh of anycross section plane, by using the area coordinate method and the isoparametriccoordinate method, we can finish the upper structure of the whole bridge withpentahedron of six nodes After finishing the whole bridge upper structure, try to managethe location piers intervals, complete the hexahedron with eight nodes mesh division ofpier structure according to its node coordinate mapping of pier height direction; Findout the rule of node coordinates, finish the unit topological node coordinates.Fourthly, create the inp file through the node data and unit topological,then import it into the ABAQUS software to realize visualization and calculation analysis, bycalculating the same example, learn to find out the advantages and disadvantages in theprocess of making the modeling, and analysis the results to determine whether thecorrectness and accuracy of the parametric modeling.Finally, make the summary and prospect of3d meshing method of continuous rigidframe bridge and put forward some improvement and suggestions according to thedeficiency of parameters modeling.