Increasing Section Method Of Technical Research Double-curvature Arch Bridge

Double Arch Bridge is a rib, arch wave, arch panels and horizontal linkages with the composite section consisting of the nature of a bridge.With novel structure, light, beautiful, stretch, materials and the advantages of easy construction.China in the last century, during the 60 to 80 years, the construction of a large number of curved arch bridge, the background is limited, early curved arch bridge design load standards for low-level, cross-sectional size is generally small, too much emphasis on saving timber, steel with less, strength of materials class Low, low level of construction; the stage for the formation of the main arch, curved arch bridge deficiencies exist weaker overall; present, most curved arch bridge in the long term heavy load, the operation of a large volume of traffic cases, all suffered different degrees of of the disease. The existence and development of these diseases not only affect the carrying capacity of the bridge, but also seriously affect the life of the bridge.This paper summarizes and analyzes a variety of curved arch bridge types and causes of disease, based on increasing section focuses on the Reinforcement of the basic ideas curved arch bridge. Established a hyperbolic arch bridge program optimization evaluation index system, based on experience with fuzzy comprehensive evaluation method to determine the principle established optimal curved arch bridge strengthening program evaluation approaches, consider the comprehensive evaluation index reached the optimal reinforcement and repair strategy. Finally, with an engineering example to introduce the increasing section Strengthening in the use of reinforcement in the curved arch bridge, and the use of curved arch bridge Midas software before and after reinforcement of the structure is simulated by the stress condition. The results show that.The structure of the existing curved arch bridge and make a reasonable assessment of reinforcement, you can restore to enhance its carrying capacity, for the elimination of traffic hazards, improve capacity and service levels are of great significance, but also can produce huge social and economic benefits.