Date of Award

Spring 2024

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Civil & Environmental Engineering

Program/Concentration

Civil Engineering

Committee Director

Zia Razzaq

Committee Member

Mojtaba B. Sirjani

Committee Member

Shahin N. Amiri

Committee Member

Gene J. Hou

Abstract

This dissertation presents the outcome of a theoretical and experimental study of Basalt Fiber Reinforced Polymer (BFRP) reinforced concrete beams and post-terrorist-attack subassemblages subjected to either quasi-static or impact load. Both BFRP reinforcement as well as BFRP fabric are used in this investigation. The sub-assemblage consists of an otherwise two-span beam converted to a fixed-end single-span one owing to the loss of a middle column blasted off during the terrorist attack. The simply supported beams are subjected to a midspan quasistatic or an impact load. However, each sub-assemblage is subjected to a quasi-static load up to collapse to simulate the residual strength after the terrorist attack. A materially nonlinear analysis based on a coupling of nonlinear moment-curvature relations with a finite-difference scheme was formulated and programmed to predict the quasi-static response of the beams up to collapse and the results were found to have a good agreement with those based on the experiments. A damped single-degree-of-freedom (SDOF) theoretical dynamic model is used to capture the post-impact free vibration of the simply supported beams. The study shows a significant enhancement of both the performance and the strength of the beams and subassemblages when BFRP material is used as a primary reinforcement or for retrofitting in practical applications including damage reduction associated with progressive collapse during a terrorist attack. Lastly, a twelve-fold increase in the beam impact collapse resistance is observed when the primary steel reinforcement is combined with a pair of externally bonded BFRP rebars.

Rights

In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

DOI

10.25777/gvfh-nr41

ISBN

9798382773346

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