Structural health monitoring of concrete structures under seismic loads has always attracted much attention in earthquake engineering community. In this paper, a piezoceramic-based device, called "smart aggregate", is proposed for the structural health monitoring of concrete structures under earthquake loading. A concrete column instrumented with smart aggregates was used as a testing object. A shake table is used to simulate the earthquake ground motion for the testing object. During the shake table tests, the distributed piezoceramic-based smart aggregates embedded in the concrete column are used to perform the structural health monitoring. For the health monitoring purpose, one smart aggregate is used as an actuator to generate propagating waves, and the other smart aggregates are used as sensors to detect the waves. By analyzing the wave response, the existence of crack can be detected and the severity can be estimated. A damage index matrix is developed to evaluate the damage status of the structure. The experimental results demonstrate the sensitiveness and the effectiveness of the proposed piezoceramic-based approach in the structural health monitoring of the concrete structure under earthquake loading.
Structural Health Monitoring of a Concrete Column Subjected to Shake Table Excitations Using Smart Aggregates
11th Biennial ASCE Aerospace Division International Conference on Engineering, Science, Construction, and Operations in Challenging Environments ; 2008 ; Long Beach, California, United States
Earth & Space 2008 ; 1-8
2008-09-04
Conference paper
Electronic Resource
English
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