Health monitoring system and method for prefabricated reinforcement sleeve connecting piece

Abstract

The invention discloses a health monitoring system and method for a prefabricated reinforcement sleeve connecting piece. The method comprises the following steps: arranging a piezoelectric ceramic sensor on the outer side of a reinforcement sleeve body, and respectively inserting a three-way piezoelectric ceramic sensor at two ends of embedded reinforcements and inserted reinforcements which are fixedly connected through the reinforcement sleeve body; taking any two of the sensors as a group of monitoring rings, generating an excitation signal by utilizing a signal function generator by virtueof the signal function generator and a signal acquisition module connected with the monitoring rings, generating stress waves in the reinforcement sleeve, acquiring electric signals generated by thesensors by utilizing a high-frequency signal acquisition system, calculating and analyzing the health state of the reinforcement sleeve connecting piece according to signal energy changes by utilizinga time reversal signal analysis method, and performing nondestructive monitoring on the prefabricated reinforcement sleeve connecting piece. Therefore, the concrete grouting compactness can be monitored in real time during construction, and slippage and the like of the reinforcements and concrete in the serving process can also be monitored in real time.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a health monitoring system and method for prefabricated steel sleeve connectors. Background technique [0002] The country advocates vigorously developing the prefabricated structure system. The prefabricated concrete structure has the advantages of high degree of industrialization, material saving, low pollution, convenient construction, short construction period, and fast investment recovery. It is the direction of the industrialization of new buildings. [0003] The reliable connection of the main tendons of prefabricated components is the key to ensure the good seismic performance of prefabricated concrete structures. At present, the main method of steel bar connection in prefabricated assembly structures at home and abroad is steel sleeve grouting connection, and the quality of sleeve grouting is an important link to ensure the safety of prefabricated structures....

AI Technical Summary

Problems solved by technology

[0004] Since the concrete and steel bars are sealed in the steel sleeve connectors, the compactness of the concrete and the bond between the steel bars and the concrete cannot be known. At present, the detection of the connectors is only through on-site sampling, which is inconvenient and harmful to the original structure. impact on the safety of

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