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Damage Identification Method for Continuous Beam Based on Curvatures of Influence Lines for Support Reaction
Damage Identification Method for Continuous Beam Based on Curvatures of Influence Lines for Support Reaction
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机译：基于支座反力影响线曲率的连续梁损伤识别方法
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摘要
Disclosed is a bearing reaction influence line curvature-based continuous beam damage identification method. The method comprises the following steps: applying a moving load to a continuous beam before and after a damage, to obtain actually measured bearing reaction influence lines of the continuous beam before and after the damage; calculating the curvatures of the bearing reaction influence lines of the continuous beam before and after the damage, and positioning the damage by means of a curvature difference of the bearing reaction influence lines; quantifying the degree of damage by means of a relative change in the curvatures of the bearing reaction influence lines of the continuous beam before and after the damage; and if the number of spans of the continuous beam is greater than two, quantifying the degree of damage by means of the sum of the absolute values of the curvatures of a plurality of bearing reaction influence lines before and after the damage. The present invention has a low requirement for the number of test points, reducing the usage number of monitoring sensors, is able to accurately position and quantify the damage of a continuous beam structure, and is applied to damage evaluation of the continuous beam structure.
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