Study On The Widening Alteration Scheme Of Jiaojiang Bridge

Jiaojiang Bridge as the main traffic channel to contact the north and south riverside of Taizhou city whose surface width does not satisfy the demand of current traffic. What's more, because the disposal of bridge transect is un-reasonable, so in a long time it could not find a suitable method to widening and reconstructing the Jiaojiang Bridge. According to the different requirements of road and city planning to the traffic organization of the section of a highway of Jiaojiang Bridge, this paper designs and puts forward seven ways in three types for widening and reconstructing of transect by analysis of the background of the Jiaojiang Bridge projection.According to the widening scheme of the newly built bridge, puts forward to adopt double layer, square steel tubes and space truss as a main girder of a new model bridge structure. To design, calculation and analysis the continuous beam bridge of 50 meters span approach bridge for Jiaojiang Bridge. To design the project, analysis the constitution of the bridge, establish model of 3D vector graph to analysis the dimension of node structure. And divide the truss into standard segmental for factory prefabrication and site consolidation, by doing so to draw up construction process. By space bar Finite Element Model to analysis the static force, buckling and eigenvalue of the mechanical properties of double layer, square tubes and space truss bridge structure.This paper puts forward and does study the new technology such as Steel-concrete Composite of Ribbed Slab to wide bridge, and puts forward that using the structure of Inclined Web Truss to sustain the cantilever wing plate, by doing so, it can increase the longitudinal rigidity of Box Girder, and it can bound the torsion, distortion and resisting the shearing force. The project designs and does study the characteristics of the old structure of the bridge, draws up the structure of widening and the way of connection between new structure and the old bridge. Founded the Finite Element Model of continuous box girder-plane bar system, and by the effective transferred-section method to analysis the deformation and stress and force of the most disadvantageous condition after main girder widening. According to the stipulation of the code for design, to calculate the loading capacity after widening of the girder under ultimate and normal situation by the criterion regulates the method of calculation. By the Finite Element Method to establish the controlling cut segment of the spatial plate elements and analysis the transverse force of Box Girder after widening, and analysis the force and deformation of widening structure.To analysis the characteristic of the pile of the bridge, to puts forward technical measures to basic reinforcing for the bridge.