Masters Theses
Keywords and Phrases
Full-scale; High strength self-consolidating concrete
Abstract
"As the nation's infrastructure continues to age, advanced concrete technologies have been developed to both reduce a structure's costs and increase its life expectancy. Since the early 1990's, self-consolidating concrete (SCC) has been one of these technologies. Many, however, have been reluctant to implement SCC in highway girders due to the mixture constituents. One of these concerns is the reduced content and size of the coarse aggregate. These differences in the concrete potentially hinder SCC's mechanical properties and shear resistance. Additionally, for high strength concretes (HSC) with weaker aggregates, shear cracks tend to propagate through the coarse aggregate, reducing the aggregate interlock component of the shear resistance.
This study aimed at assessing the web-shear strength both with and without web reinforcement of two precast-prestressed Nebraska University (NU) 53 girders fabricated with high strength self-consolidating concrete (HS-SCC). The results were compared to the ACI 318 (2011) and AASHTO LRFD (2012) code estimates, and a finite element model (FEM) package, Response 2000. ATENA Engineering, a finite element analysis (FEA) program, was also used to evaluate the qualitative results, specifically crack patterns and the effect of the coarse aggregate content and size. A prestressed concrete database was also constructed to assess the effect of the reduced coarse aggregate content on the shear capacity of HS-SCC in prestressed concrete members. The mechanical properties of the HS-SCC mix were also tested and compared to relevant empirical equations. The HS-SCC mix investigated in this study proves to be a viable cost-saving alternative for bridge superstructure elements"--Abstract, page iii.
Advisor(s)
Myers, John
Committee Member(s)
ElGawady, Mohamed
Feys, Dimitri
Department(s)
Civil, Architectural and Environmental Engineering
Degree Name
M.S. in Civil Engineering
Sponsor(s)
National University Transportation Center
Missouri. Department of Transportation
Publisher
Missouri University of Science and Technology
Publication Date
Fall 2014
Pagination
xix, 190 pages
Note about bibliography
Includes bibliographical references (pages 183-189).
Rights
© 2014 Alexander Michael Griffin, All rights reserved.
Document Type
Thesis - Open Access
File Type
text
Language
English
Subject Headings
Self-consolidating concrete -- TestingPrestressed concrete -- TestingFiber-reinforced concrete -- TestingShear (Mechanics
Thesis Number
T 10582
Electronic OCLC #
902731389
Recommended Citation
Griffin, Alexander Michael, "Shear behavior of high strength self-consolidating concrete in NU bridge girders" (2014). Masters Theses. 7328.
https://scholarsmine.mst.edu/masters_theses/7328