The Internal Force Analysis Of Wide Box Bridge Under Horizontal Pivot Support Differential Dettlement

With the development of the modern city three-dimensional traffic，the large wide spanratio Wide Box Bridges are more and more. Such as city rail viaduct, the wide of multi-linecrossing the line bridge is over30meters. When the horizontal uneven settlement is occured,This wide cross-comparison and lateral support multi-fulcrum bridge generates torsionaleffects. The box girder internal forces complex changes. This paper combines with thetructure analysis problems of elevated crossover region of a track continuous Wide Boxbridge design, Complete the work as follows:1) First,a brief overview of the development of the Wide Box Bean and structural designanalysis methods, calculated thin-walled box girder torsional analysis.2) With the design background of Lin-Chang Station crossing crossover25m+30m+25mthree-span continuous Wide Box Bean of Nanjing Metro Line3. Using ANSYS finite elementanalysis software analyze this bridge. The Full-bridge displacement as well as the internalforces of the key points were analyzed, summed different settlement under the combinedaction of internal force distribution law and proposed reinforcement proposal.3) Contrast to the maximum stress in the different settlement value, calculated settlementcontrol of the bridge to ensure the safety of the bridge and practical life.4) Using finite element model of the entity, analyze of the upper and lower surfaces,internal force distribution pattern of the internal as well as people around the hole ofdiaphragm beam. For the most unfavorable load combination, analyze diaphragm beam spaceforce. The hole of Diaphragm beam internal force distribution crack and gives diaphragmbeam reinforcement design recommendations.5) Research diaphragm beam space force characteristics, respectively create a differententity model, comparing the internal forces distribution, analyze to identify reasonable thediaphragm beam thickness and bearing position.Providing a reference to construction and the design of the bridge monitor through thisstudy of Wide box girder design.