Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"Steel fiber"”.
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The Study of Steel Fiber Reinforced Concrete
1 PDF file (66 pages)
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Structural Behaviour of Self Consolidating Steel Fiber Reinforced Concrete Beams
… closely-spaced stirrups are required. The use of steel fiber reinforced concrete (SFRC) could be considered as a potential alternative to the use of traditional shear reinforcement. Concrete is very weak and brittle in tension, SFRC transforms this behaviour and improves the diagonal tension …
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Machine Learning Prediction of Shear Capacity of Steel Fiber Reinforced Concrete
The use of steel fibers for concrete reinforcement has been growing in recent years owing to the improved shear strength and post-cracking toughness imparted by fiber inclusion. Yet, there is still lack of design provisions for steel fiber-reinforced concrete (SFRC) in building codes. This is …
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Nondestructive characterization methods for quality control of steel fiber reinforced concrete
… on their need to nondestructively characterize steel fiber dispersion and orientation within concrete wind-tower elements in order to ensure adequate structural capacity. This thesis documents the nondestructive testing research effort. A literature review was performed and preliminary …
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Single Straight Steel Fiber Pullout Characterization in Ultra-High Performance Concrete
… investigation to characterize single straight steel fiber pullout in Ultra-High Performance Concrete (UHPC). Several parameters were explored including the distance of fibers to the edge of specimen, distance between fibers, and fiber volume in the matrix. The pullout load versus slip curve was …
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Strength and Performance of Steel Fiber Reinforced Concrete Post-Tensioned Flat Plates
… testing was performed on a one-third scale model steel fiber reinforced concrete post-tensioned flat plate. The specimen had nine 10ft x 10ft x 3in. bays along with a 2ft-6in. overhang. Distributed loading was applied with a whiffle tree loading system at each bay and overhang section. Throughout …
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Performance of Steel Fiber Reinforced and Conventionally Reinforced Post-Tensioned Flat Plates
… had banded-banded tendon layout reinforced with steel fiber. The specimens were loaded to service limit state, factored load and then to failure, using a whiffle tree loading system that approximated a uniformly distributed load. Experimental results were compared to analytical results from …
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Performance of Steel Fiber-Reinforced Concrete Beams Under Shock Tube Induced Blast Loading
… focuses on the dynamic and static behavior of steel fiber-reinforced concrete (SRFC) beams. As part of this study a total of eighteen (18) beams are tested, including fourteen (14) SFRC beams, and a companion set of four (4) beams built without fibers. Seven (7) of the beams are tested under …
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The effect of carbon monoxide and steam on stainless steel fiber reinforced refractory castables
The effects of stainless steel fiber additions on the resistance of castables to CO and steam were investigated. A series of high and intermediate alumina calcium-aluminate bonded castables was prepared containing several commercial stainless steel fibers. Compressive strength and abrasion …
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Uniaxial and triaxial behavior of high strength concrete with and without steel fibers
… for both high strength concrete (HSC) and steel fiber reinforced high strength concrete (SFHSC). The experimental study mainly focuses on the octahedral shear stress strain relationship of those two types of concrete, which is adopted as the basis to develop a new incremental constitutive …
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Development of active microwave thermography for structural health monitoring
… of defects in single- or multi-layered fiber-reinforced polymer-strengthened cement-based materials, evaluation of steel fiber percentage and distributions in steel fiber reinforced structures, characterization of corrosion ratio on corroded reinforcing steel bars (rebar), and evaluation …
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Calcium-Silicate-Hydrate in cementitious systems : chemomechanical correlations, extreme temperature behavior, and kinetics and morphology of in-situ formation
… an artifacts created by the incorporation of steel fiber reinforcements in UHPC. We find that steel fiber reinforcements disrupt the perfect packing of constituent materials in UHPC to create capillary porosity at microscale. Further, we study the mechanical properties of C-S-H in concrete …
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Investigation of Ultra-High Performance Concrete for Longitudinal Joints in Deck Bulb Tee Bridge Girders
… that of conventional concrete due largely to the steel fiber reinforcement. Structural experiments were performed on idealized “bond curbs” as well as a section of deck representing actual DBT girders to determine the available bond strength and the corresponding required joint width. These …
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Design and performance of cost-effective ultra-high performance concrete for prefabricated elements
… rheology incorporating lightweight sand, hybrid fibers, and nanomaterials with improved properties; (3) design prefabricated UHPC panels with fiber-reinforced polymers (FRP) for enhanced flexural properties of stay-in-place panels made with optimized UHPC; and (4) explore potential applications …
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Low-Shrinkage Fiber-Reinforced Concrete for Infrastructure Construction and Rehabilitation
… low-shrinkage high-performance concrete (HPC): fiber-reinforced super workable concrete (FR-SWC) for infrastructure construction and fiber-reinforced self-consolidating concrete (FR-SCC) for repair applications. HPC with excess content of shrinkage mitigation materials (SMMs), including …
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Sustainable bacteria-based self-healing fiber reinforced concrete
… the coupling effect between bacteria and steel fiber to enhance the mechanical and physical properties at different ages has been investigated. Bacillus Sphaericus (B. Sphaericus) was incorporated into the concrete at concentrations of 2 x 109 (CFU/ml), and different bacterial percentages …
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Structural behavior and modeling of high-performance fiber-reinforced cementitious composites for earthquake-resistant design
… results in such a large amount of reinforcing steel that construction of the design can be congested, costly, and even impractical. This effect is particularly pronounced in critical shear and/or moment regions of structural concrete coupling beams and pile-wharf connections, as well as in …
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Seismic precursor identification method integrating acoustic emission physical models and multi-source data
… were conducted, including compression tests on steel fiber-reinforced concrete (SFRC), size effect tests on ultra-high performance concrete (UHPC), flexural tests on UHPC-strengthened beams, field monitoring of cracks in steel-UHPC composite decks, and flexural tests on glass fiber-reinforced …