Hyperbolic Arch Bridge Widening Reconstruction Technology Research

With the development of economy and the increase of traffic volume, our countryhad many old bridges because of the width of the deck is not up to the requirements ofhighway grade, or traffic surge capacity, capacity is insufficient, make the bridge intothe road transport artery "bottleneck". In order to improve the traffic capacity of thebridge, the route widens for alterations after the highway grade requirements,combined with the highway reconstruction technique is proposed for reinforcedconcrete hyperbolic arch bridge widening and reconstruction technology.First, introduced the development of reinforced concrete double curved archbridge and now, summary of reinforced concrete double curved arch bridge structuralfeatures and common diseases, made of reinforced concrete double curved arch bridgereinforcement technique for widening, introduces the common forms and methods.Secondly, introduces the general evaluation method of double curved arch bridgeand the calculation theory, according to the theory, establishment of plane linkagemodel analysis of the original bridge in the actual stress of the existence of the weaklink, combined with the actual problem proposed that solves the question mentality andthe widening of the method.Then, using the finite element analysis software, establish widened after theplane linkage model,constant load, live load and the load combination under the actionof static analysis; new and old arch rib splicing, the original bridge upper structure dueto the new bridge portion of the influence of the upper structure, the stress changes.The combination of MIDAS/FEA to establish the space finite element model on thebridge, and the original bridge stress analyses. The new main arch rib rigidity andconnection of the stiffness of the beam is increased to improve the original structurebearing capacity the conclusionFinally, the reinforced concrete hyperbolic arch bridge the widening processneeds to pay attention question are discussed and put forward the effective measures toreduce these effects.