Structural Health Monitoring Of Structures
Repaired With FRP
Author(s)
Y. Khalighi
Abstract
Sprayed FRP is a novel method developed at the University of British Columbia
which has been very successful in repairing damaged structures is Sprayed FRP.
The key to a successful and optimal usage of FRP in strengthening and
rehabilitation is in our ability to understand and effectively engineer Substrate-
FRP bond. In this paper, performance of FRP as a repair material is studied by
structural monitoring of the substrate and the FRP sprayed patch.
In this study, 35x10x10 cm concrete beams are sprayed with FRP and tested
under four- point loading. The substrate and repair material response to loading
is monitored using strain gauges carefully installed at different locations of the
structure. Ten 10-mm one-directional and two bi-directional strain gauges are
used. Data is obtained using data acquisition machine and converter software.
The load-stain curves for the strain gauges are graphed. The measurements at the
gauges located at the same level are compared and strain divergence is discussed.
Possible approaches are discussed to model the gradual process of bond
interface. This is the basis for a comprehensive damage model capable of
predicting the performance of repaired structures under various static and
earthquake loading. A field performance of these repairs will also be discussed.
The case study is a bridge in Victoria, British Columbia, which was repaired by
sprayed FRP and has been monitored over the past three years by the materials
group of UBC under Dr. Banthia’s leadership.
Keywords: fibre reinforced polymer, concrete, structural health monitoring,
bond, sprayed FRP.
Keywords
fibre reinforced polymer, concrete, structural health monitoring,
bond, sprayed FRP.
Related Book
Other papers in this volume
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