System and method for judging structural damage type of prestress concrete beam based on acoustic emission technique

Abstract

The invention provides a system and a method for judging the structural damage type of a prestress concrete beam based on an acoustic emission technique. The method comprises the following steps: acquiring a correlation diagram of amplitude-ring count, amplitude-collision count, ring count / collision count-accumulative collision count according to a detected acoustic emission signal; acquiring the ring count / collision count corresponding to the amplitude distribution range, the frequency distribution range and the peak value of the accumulative collision count as well as the damage type judgment standard; classifying the damage degree, thereby obtaining the damage type. According to the invention, the damage type of a prestress concrete beam structural element at each stress stage can be determined accurately and dynamically in real time, and a technical support can be provided for the damage prewarning. The system and the method are high in flexibility, are simple to operate, can be used for analyzing the health status of the structural element locally and integrally, and is suitable for predicating the damage degree of reinforced and rebuilt prestress concrete structures.

Description

technical field [0001] The invention belongs to the field of nondestructive testing, in particular to a system and method for judging damage types of prestressed concrete beam structures based on acoustic emission technology. Background technique [0002] The construction of bridge structures is closely related to international people's livelihood. At present, prestressed bridge structures are widely used in engineering and have achieved many beneficial results. With the development of engineering health monitoring technology, many non-destructive testing technologies have been applied to the bridge field, such as radiographic testing , ultrasonic testing, turbine testing, etc. Radiation detection can penetrate objects and have physical and chemical interactions with objects, and judge the damage of components through the strength of radiation, but the equipment is relatively expensive. Ultrasonic detection has high requirements for the shape and surface smoothness of compon...

AI Technical Summary

Problems solved by technology

The judgment of the damage type of the component is mainly based on the size of the parameters (amplitude, ringing count, energy, and duration), which is subjective to a certain extent and is not conducive to the scientific and real-time evaluation of the damage type of the component. Scientific evaluation of components provides a kind of detection equipment and method that combines structural design principles to distinguish the stress stages of components, which is not yet effective, which is the technical problem to be solved by the present invention

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