Covered Bridge Deflection On The Influence Of The Upper Structure Internal Force And Deformation

The history of the bridges is long in China and the forms is diversified. The covered bridge is a kind of architectural form with rich cultural connotation and structure characteristics,and it is the perfect product of the organic fusion of the architectural art of the house and the structure of bridge. With the advancement of technology and the growth of social demand, an increasing number of covered bridges, span becomes larger, structural form is also increasingly diverse. Some of the covered bridge has in the local formed a unique scenery line, the research and design of the covered bridge is more and more by people’s attention. However most of the covered bridges are designed to separate the bridge design and the upper structure of the design considerations, little attention is paid to the effect of the corridor bridge bridge on the upper structure. The flexural deformation of bridges in fact will have a negative impact on the superstructure of bridges, and the serious circumstances may even cause it to collapse, damage, and cause serious consequences. Therefore, cause the stress performance of upper structure of bridge bridge deflection analysis is also very important.In this paper, design and modeling of the basic function, the bridges are briefly discussed, and the application of theoretical knowledge related to the calculated deflection of the bridge caused by the settlement of main bridge superstructure. Then the analysis software Midas/Civil to establish a calculation model of the main hall of the wind and rain bridges by finite element numerical. With the help of software to calculate the data to discuss the influence of the upper structure of the bridge deflection of bridges.Mainly two point analysis: The first analysis of the maximum deflection caused by the main bridge superstructure to settlement, deformation and internal forces of the superstructure influence. Effect of different deflection change and then further study the rain bridges and deformation of the main bridge superstructure. And several results were compared and analyzed, in order to study the structure of bridge deflection deformation effect on the lower part of the bridge superstructure of bridges.Through the analysis of the bridge model: The influence of the covered bridge deflection on the displacement of the upper structure is relatively small, and one side of the main hall is bigger than the horizontal displacement;A great impact on the structure of bridge bridge deflection of column axial force,the main hall or side of each layer of the column axial force maximum value in the distance across the far side column on;The bridge deflection caused by the change of the upper structure of the great pillars of the moment,and each layer of the main pillars of minimum bending moment values are in the distance across in a recent column, but column moment of maximum value is not the distance across the distance;When the main bridge reached the maximum deflection, and change the structure of the upper beam end bending moment of beam end shear of the upper structure are great,especially main layer of the beam end bending moment and shear force in each working condition changes quickly.