The Application Of Crossbeam Analysis Method In Oblique And Curved Bridge Structures

In recent years,many oblique and curved bridges have sprung up with the modelization of our country,communication and traffic flourishing,highway, flyover junction and viaducts increasing. Many scholars,speclists and engineerers have done much research in this kind of structure and attained much progress.Though the rapid development of finite element method and computer technology have brought up amplitude vision to numerical method, oblique and curved bridge structures can be analysed by the general computer program as a kind of spatial structure. However, for the case of moving loading applied along the lateral and longitudinal directions of highway bridges,it is inconvenient to utilize the finite element analysis in the practical design. So,it is cost-effective to research the lateral loading distribution of oblique and curved bridge for the purpose of determining the internal force distributions in this kind of bridge.The crossbeam analysis method refered in the thesis is cost-effective in analyzing bridge structure by computer. And this method has characteristics of clear concept,easily understanding and applying. After the careful examination of torsion bending coupling of oblique and curved bridge, the load and internal force lateral distribution of oblique and curved bridge can be derived on the basis of linear equations constructed with each beam's elastic coefficients. Once the loading is applied on the bridge along the lateral direction,it is relatively easy to calculate the lateral distribution coefficients for girder beams. And then with the computational procedure developed for linear beams,the internal force can be calculated for girder and lateral beams respectively.