Preeti Pandey

ORCID Identifier(s)

0000-0002-4076-3745

Graduation Semester and Year

2018

Language

English

Document Type

Thesis

Degree Name

Master of Science in Civil Engineering

Department

Civil Engineering

First Advisor

Nur Yazdani

Abstract

Structural members such as columns and beams are often subjected to reduced capacity due to errors in design or construction or often due to deterioration with time. The effect of reduction in capacity due to environmental and loading conditions are often the causes for deterioration or complete failure of structures. The main objective of this study is to deliver the effect of using Pre-Saturated Carbon Fiber Reinforced Polymer (CFRP) over regular CFRP Laminates, as an external strengthening material for strength and confinement of these deteriorated structures. The hypothesis was the use of Pre-Saturated CFRP over conventional regular CFRP Wet layup procedure, will lead to an enhancement in workability and efficiency in utilization of composite as strengthening materials . There were several results in past comparing the effectiveness of FRP with different set-up, comparisons with respect to glass and aramid, arrangement of sheet with anchorage number and spacing but not much research has been done in inspecting the variation of Carbon class fibers via change of properties like saturation of laminate to reach optimum capacity of CFRP in retrofitting. Seven beams and ten cylinders has been considered in this research to evaluate the proposed hypothesis. Beams of similar dimensions were considered with one control sample followed by variations in anchorage system to compare the effectiveness of Pre-saturated over Regular CFRP. Column capacities were compared against Pre-saturated confinement over Regular CFRP confinement with the variation in the number of layers and height-to-diameter ratio. Out of ten samples, five were casted with twelve inch height followed by other five with twenty-four inches of height with similar diameters. The control samples were tested against one and two layers for both type of CFRP confinements. Three-point bending test was used for beams and axial loading for Columns. Although, column showed increase in strength as per the hypothesis but the beam test results showed variations in strength and ductility, which provided us more grounds for further research and future studies in the behavior of Pre-Saturated samples with anchorage devices. The experimental research were further compared with Theoretical computations as per ACI 440 (2017) design guidelines for beams and columns to study the percentage utilization of FRP laminate in the course of study.

Keywords

Pre-saturated CFRP, Regular CFRP, Beams

Disciplines

Civil and Environmental Engineering | Civil Engineering | Engineering

Comments

Degree granted by The University of Texas at Arlington

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