Sensitivity-based method to recognize overall damage of bridge
A damage identification and sensitivity technology, applied in the field of overall bridge damage identification based on sensitivity, which can solve the problems of waste of monitoring data, impact on evaluation results, and low analysis accuracy.
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[0054] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings. In this embodiment, a simply supported single-line steel truss bridge is taken as an example to illustrate the specific damage identification process. figure 2 Shown is a single-line simply supported steel truss bridge. The vehicle is an ordinary passenger car. The train passes the bridge at a speed of 80km / h. Since it is difficult to collect the data of the bridge in the damaged state in practice, here, the ANSYS limited Combined with SIMPACK multi-body dynamics software to simulate the acceleration response of the bridge under damaged conditions, the damage of the bridge is simulated by the decrease of the overall stiffness. by figure 2 Taking the acceleration response of middle node 3 as an example, assuming that the overall stiffness of the bridge decreases by 5%, 10% and 15% respectively, the three damage conditions are ...
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