The Finite Element Simulation And Model Experiment Of Cable Damage Status For Cable-stayed Bridges

The cable is the key component of the cable-stayed bridge, and bearing all loadon the bridge. The working state of the cable is directly related to the health state ofthe whole bridge, so the research for the cable damage status has important practicalengineering significance. This paper take the Guangdong jiujiang bridge asbackground, a scale test model of the bridge and corresponding ANSYS finiteelement model has been established. The cable damage status has been analyzed andexperimental studied based on grey correlation analysis theory. The main researchcontents are as follows:(1) This paper introduces the research status of damage assessment for thestructure of the cable-stayed bridge and the cable based on the comprehensive ofdomestic and foreign literature.(2) ANSYS finite element model has been established based on the scale testmodel of the jiujiang bridge and verified by the experiment. The force state of cableafter single or two cable disconnected has been analyzed on the basis of ANSYSfinite element model.(3) Correlation between the disconnected cable and other cables have beenobtained based on finite element simulation data using grey correlation analysistheory. According to reasonably confirm the correlation threshold, a cable forcecorrelation matrix of condition assessment for stay cables has been established.(4) A scale test model has been established. Tension sensor has been installed ineach cable, and simulated the single and two cable disconnected. According to thecomparative study about finite element analysis and experimental result, thefeasibility of the condition assessment for stay cables based on cable forcecorrelation matrix.