Study On The Analysis Of Carrying Capacity And The Load Test Of Arch Bridge

As an important testing method，bridge static and dynamic load test can provideadvantageous and direct administrators to evaluate carrying capacity of bridge，it canprovide valid actual datum for the new bridge design theory and new construction method，This paper carries on the systematic summary of the CFST(concrete-filled steel tube) archbridge`s developing history，and makes a detailed instruction about the load test of this kindof bridge.Based on the practical engineering,the following aspects are investigated:CFST numerical modeling was established by the finite element analysis softwareMIDAS， according to the bridge structure characteristic and under endogenic forcecomputation determination dead load experiment load operating mode, various operatingmodes load process and magnitude，as well as in master control section and section measuringpoint build.Through the dead load experiment，the determination bridge controls the strainand the amount of deflection value under the experimental load function which in the sectiondetermines，carries on the analysis with the model computation theoretical value， haddetermined bridge actual bearing capacity satisfies the request.The bridge has carried on the theory modality analysis using the finite element model，which can calculate the bridge`s theory base frequency resonance oscillation.The analysisobtains this bridge in the surface the rigidity to be bigger than outside the surface the rigidity，conforms to the steel pipe concrete arched bridge to inspire the rule.The moving loadexperiment respectively carries on the excitation by the race car and the bumping test form tothe bridge，obtains the entire bridge the vibration frequency and the damping ratio，the actualresult indicated this bridge has the good power performance.