Study On The Simply Supported Wide Bridge

With amount of traffic augment continuously, the enhancement of the traffic speed, In order to adapt to the rapid development of urban traffic and road widening, the wide beam bridge emerge as the times require, and playing a more and more important role in the design of the building. More and more bridges width- span ratio is greater than 1, or even more. Increase the width of the bridge, making the wide bridge space stress effectis significant, In addition to considering the bending along the longitudinal direction of the bridge under the action of load, also need to consider the whole bridge’s deformation along the transverse direction of bridge under the action of load. Assembly simply supported hollow slab bridge and simply supported T beam bridge has its own adventages and characteristics, widely used in wide beam bridge, for simply supported wide bridge, bridge structure shows the stress characteristics of two-way slab, can’t be ignored the horizontal coordination force between the girder. Therefore, analysis of the load transverse distribute on large width-span ratio simply supported girder bridge is necessary, for the design of the wide bridge,for the wide bridge detection and reinforcement has reference significance. In this paper, The finite element models with different width-span ratio simply supported hollow slab beam bridge and the finite element models with different width-span ratio simply supported T beam bridge are established by finite element software, Study on transverse load distribution rule of simply supported beam bridge with width-span ratio.The main research contents are as follows:1.Considering the factors of transverse load distribution of the wide bridge,based on the theory of hinged slab(beam) in the transverse load distribution theory, setting computational method for articulated slab girder method with considering the joint injury and considering bridge deck pavement stress.Based on the entity model of the orthogonal simply supported hollow slab and simply supported T beam bridge as the research object, and grillage model of Hollow slab simply supported beams with orthogonal as the research object, comparison and analysis of the vertical scale of influence line of the transverse load distributionCalculated by Articulated slab girder method and finite element method, To verify rationality of modeling.2.Establishing the finite element model of simply supported hollow slab beam wide bridgeand simply supported T beam wide bridge, To analyze the influence on transverse load distribution with different Width-span ratio, different span,To analyze the influence on transverse load distribution with different width-span ratio, different span, Results the main influence width sphere under the load width along the transverse direction of the bridge structure, and then get the reasonable width of bridge.3.Study on various influencing factors, influence degree of transverse load distribution of the wide bridge based on the theoretical of the study of transverse load distribution of the wide bridge,establishing the spatial bridge structure model of assembly simply supported hollow slab wide bridge,To investigate the joint damage, concrete strength grade of hinge joints,bridge deck pavement to effect of the load distribution of bridge structure and bridge transverse joint structure...