Ultimate Limit States Analysis Of Double Curved Arch Bridge Based On Destruction Test

Advantages in long spans, high capacity, low cost both in constructing and maintaining,as well as aesthetics, devote double curved arch (DCA) bridge widely used in highwaybridges. However, due to an increasingly heavy traffic and a not satisfied design code,damages occur in DCA bridge constructions, which need ultimate and serviceabilityperformance to be re-evaluated via theoretical analysis and load test in this bridge. Toimprove both lines, this paper focus on research of ultimate limit states (ULS), potentialcapacity, and residual service life in DCA bridges, which generate meaningful conclusionsin theory and reality.Based on the critical project Research on Key Technology of Double Curved ArchBridge Destruction Test and Dismantlement Security Control proposed by Department ofTransportation in Hebei, this paper analyses the load path, the whole destruction process,the destruction mechanism, and the destruction characteristics of DCA bridge in Wu’anCounty, Han dan City, Hebei. Calculating the stress data in each load step, as well asdisplacement and crack, the author provides method for evaluating ultimate limit state indesign and examining validity in DCA bridge constructions.FEA model for analysing the displacement, stress, and crack in real test is presentedthrough MIDAS CIVIL. Theories about studying in the material constitutive of reinforcedconcrete, simulation technology and calculation equations are demonstrated, considering theFEA of strain-stress and displacing and cracking process in this DCA bridge. Additionally,the author shows comparisons in results from simulation and real test, examiningapplicability and veracity of this model, to provide numerical way in similar analysis inDCA bridges.