Structural Characteristic Study On V-Shaped Pier Rigid-Frame And Arch Combined Bridge

â…¤-shaped pier rigid-frame and arch combined bridge combine the long-spanâ…¤-shaped pier continuous rigid-frame and arch bridge together organically. The overall force by V-shaped pier continuous rigid-frame primarily, arches plays tries harder role to the main span. On the one hand, Arch and the cable play a role in strengthening the mid-span, so as to reduce the high of beam and improve the long-term distortion and Stress state of combined structure. On the other hand, the bridge deck can supply a well falt for setting arch after the main span closurd and improve the stability of arch and seismic resistance. Taking the example of Guangyuan Jialing river super bridge's project, the characteristies of stress on combined structure are discussed in this thesis, and the results could be referential for the design and analysis of these system bridges.The plane bar system model of the structure was formed through reasonable simplification. And Static analysis in using stage of the bridge is proceeded. Through changing some variable parameters, the influence to the bridge is given and summarized. At last, elastic stability and seismic resistance are analysed through the space finite element model of the whole bridgeThrough the analysis, the results indicate that:This bridge'stress situation is good in the using stage, and then Internal force and deflection are reasonable. The ratio of the rise to span and the stiffness ratio's influence to the internal forces is obvious in some variable parameters. So selecting optimal range of these parameters to the designers is very important. During the construction phase and operation phase, the stability of the bridge is in good. In dynamie charaeter analysis, the out-plane stiffness is weaker than the in-plane stiffess for such type bridge, especially for small width-span ratio and heavy bearing bridge, so the cross direction vibration and stability are key problems for them. As far as this bridge is concerned, the effect of vertical component of seismic wave can not be ignored using seismic response spectrum analysis method and dynamic time-history analysis method under the uniform excitation. There are greater internal forces in the partial sections of the latter. Because the stress situation of this style of bridge is very complicated. So in this thesis just a few works are done about the research of this style of bridge, there are also some problems such as local stress analysis of arch-pier-beam fixed joint, shrinking and creeping should take advanced research.