Injuried Double-Curved Arch Bridge Capacity Of Analysis And Assessment

Double-curved arch bridge, is a bridge from China's Jiangsu Province, Wuxi County in the mid-1960s. Once for China's highway transportation played an important role. With the deepening of China's opening up and rapid economic growth, The road volume of traffic sharp increase, and theavy load vehicles also largely increase along with it. Most Double-curved bridge has been overburdened and in varying degrees of damage. Carrying capacity significantly decreased, the traffic safety caused a lot of hidden dangers. It is urgently needed carries on the supporting capacity , can thus carry on the maintenance to service and to reinforce the transformation. This article main research work includes:1,Make the injuried Daxi river double-curvature arch bridge as the object of study. Application software ANSYS, using the spatial beam unit, the shell unit and the solid unit carries on the spatial finite element modeling Simulation. Uses the different unit separately regarding the bridge different spot. Achieves both can reflect the bridge characteristic and to be able to simplified the model as far as possible. Through structure base frequency contrast which obtains with the dynamic test, there is little difference, so that the simulation is reasonable, and has good simulation results.2,Based on the changes in the frequency of the old bridge structural damage theory, revise the finite element model, carry on the finite element analysis by this to the Taxi river bridge, appraises its supporting capacity. After arevision model frequency closer experiment obtains frequency.3,With the load test result, make comparation between Theoretical and experimental results amount of two aspect of deflection and strain. The result showed that the actual value and the predicted value on qualitative are consistent, individual data existence difference. The data result may use to the bridge bearing capacity appraisal.