Shear strength design formula for RC beams with stirrups

Russo, Gianpiero; Mitri, Denis; Pauletta, Margherita

doi:10.1016/j.engstruct.2013.01.024

Cited by 36 publications

(23 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The influence of the strength of shear reinforcement on the coefficient of variation of the model uncertainty is less significant. A significant bias of the model uncertainty is primarily attributed to a limit for the angle n and improvements were recently proposed in [37,53] and also in the Model Code 2010 [19] (hereafter ''MC 2010'').…”

Section: Uncertainties In Models Provided In En 1992-1-1: Sound Strucmentioning

confidence: 99%

Uncertainties in resistance models for sound and corrosion-damaged RC structures according to EN 1992-1-1

et al. 2014

View full text Add to dashboard Cite

Resistance of civil engineering structures is primarily dependent on material properties, geometry and uncertainties related to an applied model. While materials and geometry can be relatively well described, the resistance model uncertainty is not yet well understood. The present paper improves the general concept for the model uncertainty from the Probabilistic model code of the Joint Committee on Structural Safety. Influences affecting results obtained by tests and models and effects of actual structural conditions are overviewed. Statistical characteristics of the uncertainties in resistance of reinforced concrete members are then provided considering simple engineering formulas based on EN 1992-1-1 models and effects of deterioration. To facilitate practical applications the partial factors for the model uncertainties are derived using a semi-probabilistic approach. It appears that the model uncertainties are substantial for shear resistances while they are less significant for the well-established models used for bending resistance and axial compression without buckling. Uncertainty in test procedures seems to be less important in common cases. The effect of the resistance uncertainties on structural reliability seems to be more significant for corrosion-damaged structures than for sound structures. Consequently the quantification of the model uncertainties is a key issue when assessing corrosion-damaged reinforced concrete structures. Further research should be focused on model uncertainties related to the models for shear and corrosion-damaged structures considering the fib Model Code 2010.

show abstract

Section: Uncertainties In Models Provided In En 1992-1-1: Sound Strucmentioning

confidence: 99%

Uncertainties in resistance models for sound and corrosion-damaged RC structures according to EN 1992-1-1

et al. 2014

View full text Add to dashboard Cite

show abstract

“…In the last decades, many theoretical and experimental investigations have clarified several significant aspects of shear collapse in Reinforced Concrete (RC) and Prestressed Concrete (PC) elements [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. The first model for shear strength prediction of RC beams, introduced by Ritter and Mörsch [15,16], was based on the truss analogy, where the contribution of the concrete is given by diagonal compression struts with a fixed 45°slope.…”

Section: Introductionmentioning

confidence: 99%

Shear capacity in concrete beams reinforced by stirrups with two different inclinations

Colajanni

Mendola

Mancini

et al. 2014

Engineering Structures

View full text Add to dashboard Cite

a b s t r a c tA model for the estimation of shear capacity in Reinforced Concrete (RC) beams with web reinforcement is provided by introducing a generalization of classical plastic Nielsen's model, which is based on the variable-inclination stress-field approach. The proposed model is able to predict the shear capacity in RC beams reinforced by means of stirrups having two different inclinations and longitudinal web bars.A numerical comparison with the results of experimental tests and those provided by a Finite Element Model (FEM) based on the well known theory of Modified Compression Field Theory (MCFT) is carried out for validating the robustness of the proposed model.Finally, a set of parametrical analyses demonstrates the efficiency of the proposed double transversereinforcement system in enhancing the shear capacity of RC beams.

show abstract

“…They provide wide information on the structural behavior of the elements, but they need heavy computational analyses. Thus, the use of simple rational models, based on established and verified physical theories, 16‐22 may be useful. Moreover, the recent tendency of design codes is to define different levels‐of‐approximation (LoA) to address the influence of new knowledge on design expressions, but still calibrating the time devoted to calculation according to the needed output information and maintaining the ease of use of typical codes.…”

Section: Modeling Of the Shear Behaviormentioning

confidence: 99%

“…[13][14][15] They provide wide information on the structural behavior of the elements, but they need heavy computational analyses. Thus, the use of simple rational models, based on established and verified physical theories, [16][17][18][19][20][21][22] may be useful.…”

Section: Modeling Of the Shear Behaviormentioning

confidence: 99%

Increasing the shear capacity of reinforced concrete beams using pretensioned stainless steel ribbons

2017

View full text Add to dashboard Cite

In this work, the second part of an experimental campaign investigating the efficiency of an alternative retrofitting method for increasing the flexural and/or shear capacity in reinforced concrete beams, based on the use of prestressed stainless steel ribbons and steel angles, is presented and analytically reproduced. This group of tests focuses on the ability of the adopted retrofitting method to improve the shear strength and ultimate deformation of reinforced concrete structural elements. As described in a companion paper, the adopted retrofitting method is alternative to traditional techniques of reinforced concrete retrofitting, being easy to install and usually reversible, and characterized by high fire resistance and avoiding corrosion. The experimental results obtained from shear tests carried out on nine reinforced concrete beams are presented. The efficiency of stainless steel ribbons as shear reinforcement that wrap a portion of cross‐sectional depth are analyzed, and the interaction between existing stirrups and stainless steel ribbons examined. The tests results are critically analyzed, highlighting the ability of the retrofitting method in increasing the shear strength and ductility of reinforced concrete beams. The experimental shear strength was also analytically evaluated by extending the theoretical approach of the fib Model Code 2010 formulation, originally suggested for reinforced concrete beams with or without stirrups.

show abstract

Shear strength design formula for RC beams with stirrups

Cited by 36 publications

References 16 publications

Uncertainties in resistance models for sound and corrosion-damaged RC structures according to EN 1992-1-1

Uncertainties in resistance models for sound and corrosion-damaged RC structures according to EN 1992-1-1

Shear capacity in concrete beams reinforced by stirrups with two different inclinations

Increasing the shear capacity of reinforced concrete beams using pretensioned stainless steel ribbons

Contact Info

Product

Resources

About