In the current situation of bridge construction in China,medium span and small span bridges as the most commonly structure used in bridge are still occupies an irreplaceable position,the prestressed T beam bridge with its advantages of construction and stress has been widely used in engineering.However,for the calculation of this kind of structure is more concentrated in the main girder,and usually ignore the force analysis of some local,the bridge deck as the upper load-bearing structure in direct contact with the wheel load,in the design process of medium and small bridges,only as checking calculation contents,and the reinforcement is usually use structral reinforcement,which resulted the damage probability of the bridge deck in most of the damaged bridge is larger.Serious impact on road traffic and safety.Therefore,it is necessary to analyze the stress of the bridge deck.In this paper,the load transfer law of bridge deck is analyzed,the influence of four kinds of boundary on the load transfer law of bridge deck is analyzed under uniformly distributed load and wheel load,and a detailed analysis of the load transfer law in 4 transverse location and 8 longitudinal positions.Finally,the distinction between the one-way plate and the two-way plate is given.Relying on Inner Mongolia Baobei River Bridge Project,based on static load test,the three span continuous finite element model is established,the correctness of the model is verified by the comparison between the experimental data and the theoretical data,the influence of different factors such as different thickness of bridge deck,different spacing of main girder,different diameter of steel bar and different spacing of steel bars on bridge deck stress is analyzed,the main factors influencing the stress of bridge deck are given.In order to simplify the computational difficulty,a simplified model was proposed in this paper.Finally,based on the load transfer law of the bridge deck,the correction factor for the simplified calculation of the bridge deck is presented. |