![](https://d3ilqtpdwi981i.cloudfront.net/U40-S0Z2Es0DP5Ic-yHXfWp6M8M=/425x550/smart/https://bepress-attached-resources.s3.amazonaws.com/uploads/34/e0/2c/34e02c25-484d-4545-b39d-ee9046e383cb/thumbnail_f8938675-7a84-4932-b920-b345b96caef5.jpg)
This work focuses on the analysis of a new nanocomposite cement-based sensor (carbon nanotube cement-based sensor), for applications in vibration-based structural health monitoring of civil engineering structures. The sensor is constituted of a cement paste doped with multi-walled carbon nanotubes, so that mechanical deformations produce a measurable change of the electrical resistance. Prior work of some of the authors has addressed the fabrication process, dynamic behaviour and implementation to full-scale structural components. Here, we investigate the effectiveness of a linear lumped-circuit electromechanical model, in which dynamic sensing is associated with a strain-dependent modulation of the internal resistance. Salient circuit parameters are identified from a series of experiments where the distance between the electrodes is parametrically varied. Experimental results indicate that the lumped-circuit model is capable of accurately predicting the step response to a voltage input and its steady-state response to a harmonic uniaxial deformation. Importantly, the model is successful in anticipating the presence of a superharmonic component in sensor’s output.
Available at: http://works.bepress.com/simon_laflamme/21/
This is a manuscript of an article from Structural Health Monitoring, 14(2), 2015: 137-147 doi: 10.1177/1475921714560071. Posted with permission.