Abstract
Electromechanical impedance (EMI) based lead zirconate titanate (PZT) is an effective sensor to ensure the safety of structure. In civil engineering community, Reinforced Concrete (RC) structure is one of the most familiar engineering structures. Hence, it is very important to monitor the health of structure. In this paper, a new approach of structural health monitoring using embedded PZT in host structure is proposed. There are several issues while embedding PZT inside RC structure which are examined during study. This paper presents two experimental studies on lab sized concrete beams. First implementation was carried out with different methods of embedment of PZT and its sensitivity study when the host structure was subjected to damage. The second implementation was verified in terms of conductance sensitivity of embedded Smart Aggregate (SMAG) in varying orientation i.e. horizontal (0?) and vertical (90?) after embedding in RC beam. The electrical conductance and susceptance signatures of different embedded PZT transducers were measured and damage index was calculated by using Root Mean Square Deviation Method.
Highlights
Around the world, health monitoring of concrete structure has been playing an important role in the development of civil engineering
Two different experimental studies were performed on two Reinforced Concrete (RC) beams in which first study was the comparative study of RC beam with concrete vibration sensor (CVS) and indigenously prepared Smart Aggregate (SMAG) brick and metal wire SMAG cylinder and the second study was conductance sensitivity investigations on SMAG embedded in varying orientation and surface bonded piezoelectric ceramic (PZT)
The healthy and damaged response of structure was obtained, with the SMAG brick, metal wire SMAG cylinder and CVS embedded in supported RC beam
Summary
Health monitoring of concrete structure has been playing an important role in the development of civil engineering. Structural Health Monitoring (SHM) is a process of monitoring the present condition of engineering structures. Many techniques for SHM have been reported in recent years. There are several conflicts while monitoring health of concrete structure. N. Khante 654 proach of health monitoring of structure based on electromechanical impedance (EMI) technique using embedded PZT sensors
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