Shear Strength Prediction of Reinforced Concrete Members Subjected In Axial force using Transformation Angle Truss Model

Kim, Sang-Woo; Lee, Jung-Yoon

doi:10.4334/jkci.2004.16.6.813

Cited by 2 publications

(3 citation statements)

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“…Thus, they have difficulties in considering the characteristics of steel fibers in details, and cannot consider the failure modes of steel fibers [10,11,25], which often leads to an overestimation of the member ductility. Thus, this study proposed the shear behavior models based on the softened truss models (STM) [22,26,27,28,29,30,31,32], which can estimate the contribution of steel fibers on the shear resistance by modeling them as independent tensile elements, and can simulate their pullout failure modes by reflecting the bond strengths of steel fibers.…”

Section: Review Of Previous Researchmentioning

confidence: 99%

“…Also, the flexural moment cannot be considered in FA-STM. Thus, Kim and Lee [27,31,32] proposed TATM, modifying FA-STM, in which, as shown in Figure 2g, the principal stresses and strains are obtained by rotating the stresses and strains at the crack surface by β, and the equilibrium equations and the compatibility conditions in the l − t coordinate system are derived by rotating them again by α. This process requires the shear stress-strain correlation at the crack, for which the equation proposed by Li et al [38] was used, as shown in the first term of A-13(a).…”

Section: Modified Shear Behavior Models Based On the Softened Trusmentioning

confidence: 99%

“…The existing empirical equations showed relatively larger scatter for those test results that were not within the variable ranges included at the time of their formulation. It is also worth noting that the proposed models are based on the Smeared Crack Model [22,26,27,28,29,30,31,32] that uses the average stress and average strain relationship, and that they successfully simulate the shear failure modes of SFRC beams, i.e. , the pullout failure of steel fibers considering their bond strengths.…”

Section: Evaluation Of the Proposed Modelsmentioning

confidence: 99%

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Shear Behavior Models of Steel Fiber Reinforced Concrete Beams Modifying Softened Truss Model Approaches

Hwang

Lee

et al. 2013

Materials

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Recognizing that steel fibers can supplement the brittle tensile characteristics of concrete, many studies have been conducted on the shear performance of steel fiber reinforced concrete (SFRC) members. However, previous studies were mostly focused on the shear strength and proposed empirical shear strength equations based on their experimental results. Thus, this study attempts to estimate the strains and stresses in steel fibers by considering the detailed characteristics of steel fibers in SFRC members, from which more accurate estimation on the shear behavior and strength of SFRC members is possible, and the failure mode of steel fibers can be also identified. Four shear behavior models for SFRC members have been proposed, which have been modified from the softened truss models for reinforced concrete members, and they can estimate the contribution of steel fibers to the total shear strength of the SFRC member. The performances of all the models proposed in this study were also evaluated by a large number of test results. The contribution of steel fibers to the shear strength varied from 5% to 50% according to their amount, and the most optimized volume fraction of steel fibers was estimated as 1%–1.5%, in terms of shear performance.

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Section: Review Of Previous Researchmentioning

confidence: 99%

Section: Modified Shear Behavior Models Based On the Softened Trusmentioning

confidence: 99%

Section: Evaluation Of the Proposed Modelsmentioning

confidence: 99%

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Shear Behavior Models of Steel Fiber Reinforced Concrete Beams Modifying Softened Truss Model Approaches

Hwang

Lee

et al. 2013

Materials

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Single Web Shear Element Model for Shear Strength of RC Beams with Stirrups

Jude

Lee

2018

Int J Concr Struct Mater

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In this paper, an analytical model to rationally evaluate the shear strength of reinforced concrete beams with stirrups has been developed. In the developed model, a shear critical section has been idealized with a single web element for shear and the top and bottom chords for flexure, respectively. With the longitudinal strain at the mid-depth in the shear critical section, evaluated from the flexural analysis, the web element has been analyzed, based on the analysis procedure modified from the modified compression field theory finite element formulation. Through the comparison with the test results of 201 reinforced concrete beams with stirrups exhibiting shear failure before flexural yielding, it was investigated that the developed model well predicted the actual shear strength of reinforced concrete beams with stirrups. In addition, it was investigated that the developed model rationally considered the effect of main parameters such as concrete compressive strength, shear span-depth ratio, stirrup ratio, and member depth. Through simplification, the developed model can be useful to develop more rational shear design provisions for reinforced concrete members with stirrups.

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Shear Strength Prediction of Reinforced Concrete Members Subjected In Axial force using Transformation Angle Truss Model

Cited by 2 publications

References 0 publications

Shear Behavior Models of Steel Fiber Reinforced Concrete Beams Modifying Softened Truss Model Approaches

Shear Behavior Models of Steel Fiber Reinforced Concrete Beams Modifying Softened Truss Model Approaches

Single Web Shear Element Model for Shear Strength of RC Beams with Stirrups

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