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Mukherjee, Abhijit
- Pultruded Fibre Reinforced Polymer Planks as Stay-In-Place Formwork for Concrete Structures
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1 Department of Civil Engineering, Thapar University, Patiala 147 001, IN
2 Department of Civil Engineering, Curtin University, Perth, WA 6102, AU
1 Department of Civil Engineering, Thapar University, Patiala 147 001, IN
2 Department of Civil Engineering, Curtin University, Perth, WA 6102, AU
Source
Current Science, Vol 113, No 02 (2017), Pagination: 245-252Abstract
A feasibility study in which a pultruded fibre reinforced polymer (FRP) plank was used as stay-in-place (SIP) form serving as formwork during wet stage and as reinforcement during hardened stage is presented here. First, the strength and stiffness of the FRP plank serving as formwork for concrete casting under construction stage was verified by sand-filling test. Then shear tests were carried out to develop proper bond technique between FRP and concrete, so that they can perform as composite structural member. Thirdly, static tests on beams were conducted to evaluate the load-carrying capacity and failure modes of the proposed hybrid beam. The overall investigation showed the feasibility of using the FRP plank as a SIP form-work.Keywords
Adhesive and Aggregate Bonding, Fibre-Reinforced Polymer, Stay-In-Place Formwork.References
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- Defect Detection in Plated Structures Using Ultrasonic Guided Waves
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Authors
Affiliations
1 Thapar University, Patiala-147004, IN
1 Thapar University, Patiala-147004, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 34, No 2-3 (2012), Pagination: 53-59Abstract
Many structures like ship hulls, oil storage tanks, off shore oil platforms etc. are assemblies of large plate like components which are prone to deterioration and damages. These structures are subjected to damages in the form of environmental degradation, excessive loads, fatigue loads, corrosion, etc. If these changes go unnoticed at the initial stages, it may lead to catastrophic failure of the systems. This necessitates the development of an efficient monitoring technique of these plated structures in which the large areas can be scanned quickly. Guided ultrasonic waves which have stress distributed through thickness of the plate and can propagate over longer distances provide an effective solution in such cases. This study presents a non-destructive technique for damage detection in plates using guided ultrasonic waves. Plate specimens with a notch like defect geometries were tested with varying defect depths and location. Two ultrasonic testing techniques-pulse transmission and pulse echo were effectively used in the experiment. Time of flight (using phase velocity) measurement in pulse echo and amplitude attenuation measurement in pulse transmission were metrics of exact location and extent of damage in the specimens.Keywords
Ultrasonic, Pulse Echo, Transmission, Guided Waves, Plate Structures, Dispersion.- Damage Detection in Reinforcing Bars in Concrete Using Ultrasonic Waves
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Authors
Affiliations
1 Deptt. of Civil Engineering, Thapar University, Patiala-147704, IN
1 Deptt. of Civil Engineering, Thapar University, Patiala-147704, IN