ORCID Identifier(s)

0000-0002-9255-1752

Graduation Semester and Year

2019

Language

English

Document Type

Dissertation

Degree Name

Doctor of Philosophy in Civil Engineering

Department

Civil Engineering

First Advisor

Nur Yazdani

Abstract

Fire hazard on concrete structures has been a significant concern around the world. After a fire hazard, the crucial part is the evaluation of the fire-affected concrete for strengthening or demolition. For evaluation of a fire-affected concrete structure, Non-destructive Testing (NDT) methods would certainly be a more viable option than the destructive testing methods. Until now, no specific code was developed for quantifiable evaluation of fire-affected concrete with NDT. To develop the method for Non-destructive Evaluation (NDE) of fire-affected concrete, 8 small-sized (4 in x 4 in x 15 in) and 32 medium-sized (8 in x 8 in x 36 in) concrete beams were prepared and heat-treated in the high capacity lab furnace for variable durations following standard curve. After that ground penetrating radar (GPR), impact echo (IE), ultrasound pulse, thermal or infrared camera, and Schmidt hammer was used to scan the heat-treated beams. The scanned data were used to produce a quantitative relationship between the scanned outcome and the parameters. The medium-sized beams were then tested for four point bending, the data for which was used to verify the relationship between the NDE data and residual strength in concrete. A Finite Element Model (FEM) was also developed in ABAQUS. For the computer modeling, heat transfer theory was used for heat application simulation. Afterward, four point bending was also simulated for residual strength. The developed numerical models were calibrated with the experimental data and can be used for verification or further parametric analysis.

Keywords

Non-Destructive Testing (NDT), fire-affected concrete evaluation, Fiber Reinforced Polymer (FRP) bar, Fire Proofing, Ground Penetrating Radar (GPR), Thermal or Infrared camera, Schmidt Hammer, Impact Echo, Ultrasound Pulse, Structural health monitoring or evaluation.

Disciplines

Civil and Environmental Engineering | Civil Engineering | Engineering

Comments

Degree granted by The University of Texas at Arlington

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