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Corpus ID 134833694.Concentric punching shear strength of reinforced concrete flat plates @inproceedings{Moeinaddini2012ConcentricPS,title={Concentric punching shear strength of reinforced concrete flat plates},author={Fariborz Moeinaddini},year={2012} } results for this questionFeedbackPunching shear strength of reinforced concrete transfer In the present study,concentric compression tests were performed on four RC transfer slabs with small shear span-to-depth ratio and shear reinforcement to investigate the two-way shear strength.The test parameters were the conventional stirrups,lap splice of stirrups,and steel truss for shear reinforcement. results for this questionHow does affect the punching capacity of a slab?How does affect the punching capacity of a slab?The effect of on slab punching capacity has been discussed in the past by many researchers.Intuitively,a decrease in should lead to a reduction in the depth of the compression zone available to resist transverse shear,and also to an increase in the width of flexural cracks near the column.STRUCTURE magazine Addressing Punching Failure

punching shear in reinforced concrete flat plates under eccentric loads experimental investigation.july 2017

Author Aurelio Mutt

Estimated Reading Time 6 mins

Apr 15,2021·The punching shear strength of plates is a function of the flexural reinforcement ratio,and the investigation shows it is proportional to power 1/3.And a power of 1/2 for f'c.Alternative for Concentric Punching Capacity Evaluation of This variable has been identified as a major factor affecting the punching shear capacity of two-way concrete slabs.This study seeks to determine if the Tureyen-Frosch can be extended to develop a simple procedure that renders safe concentric punching shear capacity estimates for two-way slabs reinforced with either steel bars or fiber reinforced polymer (FRP) bars or grids.Author Ali S.Ngab,Md.Saifuddin ShahinPublish Year 2021Databank of Concentric Punching Shear Tests of Two-Way A punching shear strength mechanical model for RC flat slabs with and without shear reinforcement,based on a beam shear model previously developed by the authors,is presented.

Reinforced concrete (RC) flat plates are vulnerable to punching shear failure due to small effective area for shear resistance.To strengthen the behavior of existing flat plates,use of ultra highAuthor Fariborz MoeinaddiniPublish Year 2012People also askHow does punching shear strength of concrete relate to thickness?How does punching shear strength of concrete relate to thickness?Accounting for the proposed failure criterion and load-rotation relationship of the slab,the punching shear strength of a flat slab is shown to depend on the span of the slab,rather than on its thickness as often proposed.(PDF) Punching Shear Strength of Reinforced Concrete Slabs Author Su-Min Kang,Su-Jeong Na,Hyeon-Jong HwangPublish Year 2021Comparative analysis of punching shear strength for without shear reinforcement subjected to concentric punching at interior column locations.However,Ospina missed Chinese and Japanese paper written in Chinese and Japanese,respectively.The purposes of the present study are to create database for the punching shear strength of RC slabs,

Apr 01,2012·Punching shear strength in reinforced concrete slabs subjected to concentrated loads has received a lot of emphasis due to its importance in flat slab floor systems ,.Due to its brittle nature,shear failure at slab-column connection may have disastrous consequences.Author Wang-Xi Zhang,Bo Li,Hyeon-Jong Hwang,Jin-Yi Zhang,Long-Jie Xiao,Wei-jian Yi,Hong-Gun ParkPublish Year 2019Punching shear strength of reinforced concrete flat slabs Punching shear strength in reinforced concrete slabs subjected to concentrated loads has received a lot of emphasis due to its importance in at slab oor systems [1,2].Due to its brittle nature,shear failure at slab-column connection may have disastrous consequences.ItAuthor Zainab A.Neamah,Munaf A.Al-RamaheePublish Year 2021Punching Shear Strength of Reinforced Concrete Slabs structures,shear and punching shear,fiber-reinforced high-strength concrete,soil-structure interaction,and the conceptual design of bridges.Fig.1Plots of load-rotation curves for tests by Kinnunen and Nylander8 (geometric and mechanical parameters of tests defined in Fig.8).

Punching shear strength of reinforced concrete transfer slab-column connections with shear reinforcement concentric compression tests were performed on four RC transfer slabs with small shear Cited by 14Publish Year 2019Author Ala Torabian,Ala Torabian,Brisid Isufi,Davood Mostofinejad,António Pinho RamosPREDICTING THE PUNCHING SHEAR STRENGTH OFconcentric punching shear tests of reinforced concrete flat plates available in the literature.The fuzzy system was trained to address the uncertainty in the relationship between various parameters,which might not be captured in previous research attempts.Cited by 17Publish Year 2013Author Mohamed Hassan,Ehab A Ahmed,Brahim Benmokrane(DOC) A Retrofit Punching Shear Strengthening Technique This program set out to confirm the effectiveness of using shear bolts to increase the shear strength and ductility of interior slab-column connections subjected to concentric punching.The study also included,constructing openings into the connections near to the columns to deliberately reduce the strength of the connection and then strengthening against punching shear failure.

The Tureyen-Frosch one-way shear design rationally accounts for the effect of the longitudinal reinforcement stiffness on the shear strength of rectangular concrete beams without transverse reinforcement.This variable has been identified as a major factor affecting the punching shear capacity of two-way concrete slabs.This study seeks to determine if the Tureyen-Frosch can be extended to Cited by 3Publish Year 2017Author Jales Almeida Silva,Marília Gonçalves Marques,Leandro Mouta Trautwein,Ronaldo Barros Gomes,GilsoBehavior of thin lightly reinforced flat slabs under Oct 01,2019·The concentric monotonic punching shear tests of four thin flat slab specimens were described Cited by 4Publish Year 2012Author Carlos E.Ospina,Gerd Birkle,null WidiantoPunching of reinforced concrete flat slabs with holes and For slabs without shear reinforcement,the circumferential crack appeared at 26 % to 48 % of the failure load,and at 33 % to 86 % for the slabs with shear reinforcement.The results also show that the use of this shear reinforcement can be a possibility to increase the punching strength in flat slabs with holes.

Reinforcement Ratio Effect and Interaction Between Shear and FlexurePunching of Slabs with Low Reinforcement Ratios and The Issue of DuctilitySize EffectReferencesThe absence of a term is often cited as a major deficiency by those who claim that the ACI 318 equation does not predict the punching shear capacities of test slabs as accurately as other equations that explicitly include this variable.This claim is,however,unfounded.Alexander and Hawkins (2005) reminded the profession that the ACI 318 equation was never intended to be used as a shear capacity predictor.Instead,it is a design equation aimed at precluding a brittle punching shear failure before thSee more on structuremagDatabank of Concentric Punching Shear Tests of Two-Way Jul 11,2012·Hundreds of laboratory experiments have been conducted to date to investigate the punching shear behavior of two-way reinforced concrete (RC) slabs at interior supports.These experiments provide a mandatory frame of reference for the development,calibration and evaluation of punching shear design provisions.Cited by 7Publish Year 2016Author Reza Aghayari,Mohammad MoradiPunching of flat slabs Design examplePunching strength with shear reinforcement Firstly,one has to check if the design shear force V d is smaller than the maximum punching strength V Rd,max.This is done assuming k sys=2.The design shear force V d is below the maximum punching strength V Rd,max.Therefore,the slab can be reinforced with shear reinforcement complying with

Jan 26,2013·The noncorrosive fiber-reinforced polymer (FRP) composite bars are an excellent alternative reinforcement.In this paper,a review of the available punching load equations of two-way FRP-reinforced slabs and shear strength equations of one-way FRP-reinforced slabs is provided.All the models were verified against results for test specimens from the literature.The equivalent steelConcentric Punching Shear Strength of ReinforcedAS 3600-2009 only recognises shearheads as an effective shear reinforcement to increase the concentric punching shear strength of slabs,and it does not cover more practical types of reinforcement such as shear studs and stirrups unlike mostEstimated Reading Time 8 minsACI STRUCTURAL JOURNAL TECHNICAL PAPERin punching shear4,5 is (5) Concentric punching shear capacity with shear reinforcement The CSA and ACI standards4,5 permit the use of closed stirrups or vertical shear studs as shear reinforcement that are positioned prior to casting and are typically located along perimeters that parallel the column periphery (Fig.3).

concentric.El-Salakawy et al.[2] investigated the effect of shear bars or shear bolts in the punching strength and the deformation capacity of the connections and ductility due to transferring of the failure mode from the punching to flexural.Esfahani et al.[3] studied the punching shear strengthening of RC flat slabs using CFRPNon-linear finite element analysis of reinforced concrete 2000 155 mm) subjected to concentric and eccentric punching loads.The main parameters in this study were the eccentricity of the load,the opening size,the location of the opening relative research has been conducted on punching shear strength of at reinforced concrete slabs with openings near columns,in com-Punching Shear Strength of Reinforced Concrete Slabs without Transverse Reinforcement.July 2008; Aci Structural Journal 105(4) concentric rings placed at the boundary of the slab element.

The punching shear strength of reinforced concrete (RC) flat slab is the main concern in the structural behavior.This study presents a strengthening technique for improving punching shear resistance in RC two-way flat slabs using RC column capital.Two sizes of column capital were used (600 × 600 and 800 × 800 mm),and the influence of column capital on the behaviours of two-way solid slabs Punching shear strength of reinforced concrete column Nov 01,2019·To avoid punching shear failure,the punching shear force (F l) should not be greater than the punching shear resistance (F Rl) in Section 8.2.8 of GB50007-2011 (6) F l = p j,max A l F Rl = 0.35 hp f t c 2 + c b d where hp is the coefficient related to the footing thickness on punching shear resistance; f t is the design value of the tensile strength of concrete; c 2 is the length of thePunching shear strength of reinforced concrete transfer In SR1,D10 bars (diameter d b = 9.5 mm,cross-sectional area A b = 71 mm 2,and length = 392 mm each) were used at a spacing of 60 mm for shear reinforcement (i.e.rebar ratio = 0.264%),which developed the maximum contribution (V s) of shear reinforcement to the two-way shear strength specified in ACI 318-19 (i.e.V u = V c + V s 3V c,where V c is the two-way shear strength developed by concrete when shear

in practice is to calculate the punching strength of the slab using the ACI punching shear equations and compare it with the failure load (ultimate shear force) that causes flexural failure of the slab as calculated using the yield line theory.The lower of these two failure loads will be the punching shear capacity of the slab.Punching-Shear Strength of Normal and High-Strength Two Dec 06,2013·The test results and results from literature were used to assess the accuracy of the punching-shear provisions of fiber-reinforced polymer (FRP) design codes and guides.Despite the 60 MPa limit of the Canadian standard punching-shear equation,it yielded good predictions for specimens with concrete strengths of 7175.8 MPa.Punching-Shear Strength of Normal and High-Strength Two TRT Terms Deflection; Fiber reinforced polymers; Glass fibers; High strength concrete; Shear strength; Slabs Uncontrolled Terms Punching shear Geographic Terms Canada

For slabs without shear reinforcement,the circumferential crack appeared at 26 % to 48 % of the failure load,and at 33 % to 86 % for the slabs with shear reinforcement.The results also show that the use of this shear reinforcement can be a possibility to increase the punching strength in flat slabs with holes.

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