Shear Behavior of Ultra-High Performance Hybrid Fiber Reinforced Concrete Beams

Bermudez, Manuel; Hung, Chung-Chan

doi:10.21838/uhpc.9736

Cited by 8 publications

(2 citation statements)

References 7 publications

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“…Literature review summary of R/UHPC beams, select properties and response.Papers: 1. Bermudez and Hung (2019), 2. Chen et al (2018), 3.…”

Section: Appendix a Literature Review Summary Of R/uhpc Beams Select ...mentioning

confidence: 99%

Investigation of shear response due to variation of fiber volume fraction, transverse steel, and placement method on short span R/UHPC beams

Frank,

Amaddio,

Landes

et al. 2024

Advances in Structural Engineering

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This study investigates the response of small-scale, reinforced ultra high performance concrete beams. Seven specimens were cast and experimentally tested. Steel fiber volume fraction, amount of longitudinal and transverse steel reinforcement, and casting direction varied between specimens. High longitudinal reinforcement ratios of 4.1% and 9.5% were expected to drive relatively large shear demands and low steel fiber volume fractions of 0.5% and 1% were expected to decrease the UHPC’s ability to resist tension, shear, and compression. Specimens were either cast at one end or mid-span. All specimens failed in shear, as expected. R/UHPC beams with only 0.5% fibers and a stirrup spacing equal to half the beam’s depth carried more ultimate load than beams with 1% fibers and twice the stirrup spacing. At a 0.5% fiber volume fraction, UHPC performed well, exhibiting fiber bridging in tension and resisting spalling in compression. As longitudinal reinforcement ratio increased from 4.1% to 9.5%, load carrying capacity generally increased, but not proportional to the increase in steel. Placement method did not influence fiber orientation in the R/UHPC beams when measured in 2D planes transverse or longitudinal to the specimens’ major axis. The longitudinal and transverse reinforcement interrupted fiber flow and prevented significant fiber alignment; combined with the short span of the beams, these factors mitigated the influence of placement method.

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“…Literature review summary of R/UHPC beams, select properties and response.Papers: 1. Bermudez and Hung (2019), 2. Chen et al (2018), 3.…”

Section: Appendix a Literature Review Summary Of R/uhpc Beams Select ...mentioning

confidence: 99%

Investigation of shear response due to variation of fiber volume fraction, transverse steel, and placement method on short span R/UHPC beams

Frank,

Amaddio,

Landes

et al. 2024

Advances in Structural Engineering

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“…With reinforcement ratios of only 0.90% and 1.2%, however, the beams were not heavily reinforced. In R/UHPC beams with a 7.6% reinforcement ratio, shear span-to-depth ratios of 1.5 or 3.3, and fiber volume fractions ranging from 0.75% to 2.25%, fibers alone provided sufficient shear strength per ACI 318-14 (Bermudez and Hung, 2019). The study used very high longitudinal reinforcement ratios and short shear spans, creating a high shear demand, but hooked steel fibers of different lengths were used and determined to be key in enhancing shear properties of the R/UHPC beams.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Steel Fibers and Transverse Steel Reinforcement for Shear Capacity in Reinforced Ultra High Performance Concrete Beams

Frank,

Amaddio,

Decko

et al. 2023

Third International Interactive Symposium on Ultra-High Performance Concrete

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Ultra high performance concrete (UHPC) is a class of cementitious composites comprised of a mortar mix containing a relatively large percentage of cement and short, randomly disbursed fibers. Its high strength and ability to maintain narrow crack widths lend the material to a wide range of applications. When reinforced with deformed steel bars, proper care in design is required to make efficient use of both the longitudinal steel in tension and UHPC fracture toughness in compression. Recent studies have shown that a high reinforcement ratio combined with a low fiber volume fraction leads to increased ductility and a favorable, gradual failure path. The objective of this research is to study the response of steel reinforced UHPC beams (R/UHPC) with a high shear demand from both a high reinforcement ratio (above 4%) and low shear span-to-depth ratio (near two). Four small scale R/UHPC beams were experimentally tested. Transverse steel reinforcement ratio and steel fiber volume fraction were varied. Experimental results show that more narrow stirrup spacing with a lower fiber volume allowed the R/UHPC beams to more fully utilize the longitudinal steel properties in tension and UHPC properties in compression. Additionally, results

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Prediction of behavior of UHPC beams based on truss models

Zhang

Kho

2023

Structures

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Shear Behavior of Ultra-High Performance Hybrid Fiber Reinforced Concrete Beams

Cited by 8 publications

References 7 publications

Investigation of shear response due to variation of fiber volume fraction, transverse steel, and placement method on short span R/UHPC beams

Investigation of shear response due to variation of fiber volume fraction, transverse steel, and placement method on short span R/UHPC beams

Comparison of Steel Fibers and Transverse Steel Reinforcement for Shear Capacity in Reinforced Ultra High Performance Concrete Beams

Prediction of behavior of UHPC beams based on truss models

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