CEE GEOTECH/STRUCT/MAT/CONSTR Seminar: Dayakar Penumadu
Title: "Fiber Reinforced Polymer Composites and Bridge Demonstration Project in Morgan County"
Introduction to Fiber Reinforced Polymer (FRP) based composite materials and manufacturing will be provided. Tickle building bridge is an example of working FRP bridge many of you have accessed as a CEE student or a faculty/staff member. As an example application, FRP bridge decks will be introduced for this presentation using a demonstration project in Morgan County, Tennessee. Fiber-reinforced polymer composites are suitable for bridge decks due to their high strength, lightweight, resistance to corrosion, and long-term durability with 100 plus year design life. Structural health monitoring is critical for long-term assessment of the condition of the bridge structures for effectively detecting damage and actual distributions of complex loads from vehicle traffic. In this study, the strain distribution was demonstrated using two types of fiber optic sensors bonded to the surface of a glass fiber reinforced-based composite bridge deck designed and manufactured by Structural Composites, Melbourne, Florida. The fiber optic sensors obtained from Luna, Innovations, Inc., utilizing Rayleigh scattering and high spatial strain resolution were positioned strategically based on expected stress distributions to measure strain in the longitudinal, transverse, and diagonal directions along the span of the composite bridge. Fiber Bragg grating sensors monitored the dynamic or high speed vehicular loading (for example deformations from a future potential crash type event) based strain distribution. Additionally, a wireless configured sensor package was custom developed and integrated with the composite bridge located in Morgan County, Tennessee, to monitor environmental loading and mid-point displacement and correlated well with the strain distribution measurements from the fiber optic-based sensors.
Thursday, February 3 at 2:50pm to 4:05pm
John D. Tickle Engineering Building, 405
851 Neyland Dr, Knoxville, TN 37996