Damage Detection Of Concrete Beams With Different Gradation Based On Piezoelectric Sensor

During the long-term service life of civil engineering structure, it will suffer damageinevitably, influenced by loading conditions and other factors. Health monitoring for thestructures is required, how to effectively detect the initial damage of structure, evaluate thelife of the structure is required. This paper, identify the concrete beams damage based on thepiezoelectric impedance technology to.This paper, firstly introduces the significance of research, summary of the traditionalcivil engineering structure damage detection method of the status, Expounds thepiezoelectric impedance method in current research at home and abroad, discusses thestructural damage it with the traditional method of comparison and advantages. And thenintroduced the piezoelectric impedance method used for structural health monitoring. Finallythrough the experiment of PZT to verify in concrete structure in monitoring the feasibility,PZT sensor for waterproof processing firstly, after the treatment of waterproof the PZTsensor was embedded into three concrete beams of different grading to identify the damagewith the experimental research. Test results show that is less sensitive to C20concrete beamswith surface damage based on embedded PZT sensors, judge the structure damagedevelopment with damage health index is effective.In this paper only use C20concrete beam with small size with the experimentalresearch, we still need identification damage research for different strength of concretebeams in future. PZT practice using remains to be more people involved, this method can beapplied to large complex civil engineering structure in the near future.