CFST Arch Combined Bridge Tied With Arch Stiffness Values Identified Studies

With the development of science and technology, productivity levels higher thanever before, Tied Arch Bridge in China has been an excellent development.Tied ArchBridge is a unique form of arch, arch form as he not only has one of the basiccharacteristics of arch, and its own unique character is very obvious. Overall TiedArch Bridge is integrated with a special type of arch and beam advantages He is notjust the simple coupling together two structures,But both structures share the load sothat the force,Make full use of arch pressure,beam flexural strengthcharacteristics,Tied by the boom to bear the load and transfer to the gravity andRib,The Rib Tied to pull the arch thrust also cancel each other out Then formation ofa statically indeterminate structure. This external arch is statically determinate systemInternal internal Was an ultra-quiet system Therefore no impact on the pier unevensettlement. Arc bridge from structure for thrust system and no thrust system can bedivided into two kinds. In the process of arc bridge construction tie-rod stiffness ofcomposite system, Tie bar in the influence of the prestressed force of arch and tie baritself Has always been a question worthy of in-depth discussion Therefore moretie-rod stiffness and arch stiffness changes to determine the reasonable stiffness valueis very deserving of research. This paper, taking hainan qionghai JiuQuJiang bridgeproject as the background For long-span steel tube concrete arc bridge is studied Themain contents are as follows：①Combining JiuQuJiang bridge engineering example The build process of arcbridge model are introduced And the boundary conditions of a few key processing anddetailed analysis has been done for the construction stage division Arc bridge model isestablished in this paper provide a reference for the future②Through modeling calculation to simulate different tie-rod stiffness and thestress of the composite system under arch stiffness And optimize the tie bar and archstiffness optimal stiffness are obtained Study the influence of different tie barprestressed combination system optimization of tie bar prestressed best stress state ofprestressed value are obtained③Study the reasonable stiffness ratio of beam and arch put forward Arc bridgeunder different beam section stiffness than different lateral stiffness ratio, vertical stiffness ratio and section parameters, the influence of different material parameterson the structural dynamic characteristics Finally, we compare the correspondingparameter optimum range by calculating the displacement of the internal forces...