Key Structure And Force Analysis Of Corrugated Steel Web Low Pylon Cable-stayed Bridge

Cable-stayed bridge,also known as the cable-stayed bridge,is a combination of the bridge,the upper structure of the main beam,cable and tower of three components,with the force clear,strong spanning capacity,good landscape effects.In the long span cable stayed bridge,the anchor position of the main girder cable acts on the concentrated force of the inclined cable,and then the axial force,shear force and bending moment are transferred to the main beam through the anchor structure.Anchorage zone of the local stress is large,the anchor structure must be clear and reasonable stress to the main beam.Therefore,how to design and deal with the anchorage structure,make the transfer of force and avoid stress concentration becomes an important research topic in recent years.This paper summarizes the research status of the cable girder anchorage zone of cable-stayed bridge,this paper introduces the structural characteristics of the extradosed cable-stayed bridge and the stress characteristics of extradosed cable-stayed bridge in the economic span of 100~300m;especially the Yuduotaduo span and limitation of extradosed cable-stayed bridge;cable stress change the smaller the construction process and after the closure,do not need basic cable force adjustment,considering the stiffness and fatigue,it is more suitable for high traffic load,railway density or double deck bridge.In this paper,based on the background of Nanchang Chaoyang Bridge,through the finite element software MIDAS to establish the full bridge space model,the use of the state of the force analysis,the internal force data to meet the relevant specifications.By using the finite element software ANSYS to establish the solid model of steel anchor box,the stress on the maximum in the state of bridge cable force case analysis,the stress distribution,to further clarify the force of the steel anchor box internal force component complex way: through close contact with the anchor plate anchor box head sealing plate,steel plate shear compression directly to the transmission cable force,pressure transformation of anchor plate transfer into two parts,one part directly through the shear edges of plate shear transfer to another part of the pressure plate;the overall composition through the head sealing plate and the inner anchor box longitudinal stiffener to shear transfer the shear stress of the steel anchor plate,transverse stiffener and longitudinal stiffener values were improved,the anchor box transverse stiffeners,lateral longitudinal stiffened plate and the tail sealing plate thickness can be considered a certain degree of reduction.