Beam structure damage identification method based on corner influence line Katz1 fractal dimension

The invention discloses a beam structure damage identification method based on a corner influence line Katz1 fractal dimension, and the method comprises the following steps: setting a corner measurement point at each support of a beam structure, and obtaining the corner influence line of each support through applying a moving load before and after the damage of the beam structure; carrying out subtraction on the corner influence lines before and after damage, calculating the Katz1 fractal dimension, and carrying out damage positioning through mutation on a Katz1 fractal dimension curve of the corner influence line difference; further performing overall damage degree quantification through the change rule of the fractal dimension of the corner influence line Katz1 before and after damage; if the structure is a statically indeterminate beam structure, performing damage degree quantification by adopting corner influence line Katz1 fractal dimension superposition of a plurality of supports; in order to obtain the