Date of Award

Spring 2024

Document Type


Degree Name

Doctor of Philosophy (PhD)


Civil & Environmental Engineering


Civil Engineering

Committee Director

Zia Razzaq

Committee Member

Mojtaba B. Sirjani

Committee Member

Shahin N. Amiri

Committee Member

Gene J. Hou


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.


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