Static And Stability Analysis Of Caiyuanba Yangtse River Bridge In Chongqing

With the development of bridge engineering technologies, steel arch bridges become the most popular bridge type in long span bridges because of their beautiful shapes and strong impression to people.Based on Caiyuanba Yangtse River Bridge under construction in Chongqing, this thesis focuses on static analysis of the bridge in finished phase, static analysis of the bridge in the main construction phases and parameters of the main components influencing on stability in finished phase, disclosing the stress characters of long span steel arch. This thesis has dealt with the following respects:1)Based on geometry and material properties of structure components in designed drawings, the thesis discusses the simulations of structure components, mass and boundary conditions in the model and three-dimensional finite-element model is founded .2)Static analysis of Caiyuanba Yangtse River Bridge in Chongqing. Considering the three of the most disadvantageous combinations in finished phase, the stress, the internal force and deformation of main components, like Y form, arch, tied bar and suspender, are computed, proving that the structure meet the demand of criterion. Meanwhile, the stress and the internal force of main components are also computed in the main construction phases, proving cantilever construction is feasible.3)Stability analysis of Caiyuanba Yangtse River Bridge in Chongqing. For the first category of stability, buckling eigenvalues of the finished phase and main construction phases are computed under dead load. Based on the characters of the bridge, parameters influencing buckling eigenvalues of the bridge, like arch obliquity and rigidness, the number, types and rigidness, the types of suspender, the constraint types of arch and follower force, are analysed, and the influencing trend on buckling eigenvalues of the long span arch bridge is achieved in aim of instructing the design of the same bridge types. Aiming at the main span, the influence of the follower force on lateral buckling is computed.