Stiffness Parameter Optimum Identification Of Bridge Structure Based On Static Method And Its Finite Element Model Updating

The state parameter which after completed status of the bridge is always different from the original value of design, and theoretical calculation model of load test after completed state usually adopt the initial parameters when it is designing. The effect value which calculated by this model isn't as same to the test value, and initial finite element model is also not conform to the true state of structure, we can not understand the true stress. In order to obtain the rigidity parameters of the true state of structure, it need to optimum identification. In this paper, with the minimal residual between field test deflection and finite element calculated value as the objective, based on static force displacement testing value, identify the true stiffness parameters for the structural through the continuous optimization of the finite element model. The mainly aspect of calculation and analysis as followings:1. Based on Ye Shan He big bridge tested deflection dates of static load experiment, under the guide of optimization theory, with the conditions of calculated value approach the field test value, to identify the stiffness parameters. Use the identified stiffness parameters to modify the finite element model, established modified finite element model which close to the actual situation to calculate the true effect of the structure.2. Process optimum identification calculation of Ye Shan He big bridge with optimum module by use ANSYS software and procedure own compiled of Matlab. And achieved acess connection between software of ANSYS and Matlab.3. Use the finite element model which has been optimized and updated into the computation analysis in other operating conditions of bridge static load experiment.4. Process comparative analysis cross over static force and dynamical force optimum identification in order to discuss the relationship between them.