Bridgesingle Column Pier Checking And Reinforcement On Application In The Engineering

In recent years,single column pier bridge,because of its good-looking style,small body,small space occupation,the project budget relatively low,is widespread used in road engineering.At present,our researchs on the bridge superstructure of the transverse anti overturning performance are in the preliminary stage,so it is difficult to have a systemic understanding of the real life of bridge about reinforcement treatment of bridge overturning.Therefore,the analysis of the upper structure of the single column pier and the research on the strengthening method of its superstructure is imminent.In this paper,a bridge in Henan Province Wang(floor)LAN(high speed)was chosen as an engineering example,the bearing capacity of the box girder bridge bearing structure of single column pier and reinforcement method,do research and calculation.The main contents of this paper are as follows:1?Based on the theoretical analysis of the single pier of the bridge,it is difficult to understand the mechanical behavior of the bridge structure,which belongs to the nonlinear analysis of the bridge structure2?this paper established the component element model with Midas finite element software civil2011,simulating the field of bridge bearing component void deformation,found after bearing cavity on the beam stress influence.Bearing cavity,enlargement of main girder bending moment in varying degrees,and the internal force of the main beam in each span section increases much greater than the fulcrum section.In addition,the same bearing cavity,a fulcrum force re distribution.When a bearing cavity,with its adjacent rows of support force increases rapidly.3?select the West Bridge Lankao CK1+098 single column pier,were selected with concrete cover beam method,additional column method,for the transformation of the reinforcement design of hollow pier or vase pier.Reinforcement design and construction,according to the stress situation,new concrete copings sometimes only on one side of the single column pier design,sometimes adding additional symmetrically on both sides;single column pier concrete cover beam,and not the overall appearance of the lower,smaller on the impact of traffic under the bridge,but the resistance performance of the original single column pier requirement is higher.When the original single column pier safety coefficient of bearing capacity is small and can be used for reinforcement a column or a hollow pier or vase pier in the way of single column pier on both sides.Which should be combined with the bridge reinforcement,stress characteristics,economic rationality and other aspects of comprehensive consideration,an optimal solution.