scholarly journals Size effect in shear and punching shear failures of concrete members without transverse reinforcement: Differences between statically determinate members and redundant structures

2017 ◽  
Vol 19 (1) ◽  
pp. 65-75 ◽  
Author(s):  
Miguel Fernández Ruiz ◽  
Aurelio Muttoni
Keyword(s):  
Size Effect ◽  
Punching Shear ◽  
Transverse Reinforcement ◽  
Concrete Members ◽  
Shear Failures

scholarly journals Influence of Fatigue Loading in Shear Failures of Reinforced Concrete Members without Transverse Reinforcement

2015 ◽  
Vol 13 (5) ◽  
pp. 263-274 ◽  
Author(s):  
Miguel Fernández Ruiz ◽  
Carlos Zanuy ◽  
Francisco Natário ◽  
Juan Manuel Gallego ◽  
Luis Albajar ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Fatigue Loading ◽  
Transverse Reinforcement ◽  
Concrete Members ◽  
Shear Failures

scholarly journals Improvement of bearing performance on exterior steel beam-reinforced concrete column joints with steel column

2018 ◽  
Author(s):  
Shinya Nakaue ◽  
Yasushi Nishimura
Keyword(s):  
Reinforced Concrete ◽  
Shear Failure ◽  
Maximum Strength ◽  
Punching Shear ◽  
Steel Beam ◽  
Transverse Reinforcement ◽  
Concrete Column ◽  
Bearing Failure ◽  
Reinforced Concrete Column ◽  
Steel Column

To improve the bearing failure behavior of the exterior steel beam-reinforced concrete column joints composed of reinforced concrete columns, joint details using steel column was proposed. Steel column was attached to the lower flanges at right angles to the steel flange. The objective of this study is to clarify the effectiveness of proposed joint details experimentally and theoretically. To clarify the influence of steel column on the bearing failure of the joint, seven T-shaped subassemblages were tested under reversed cyclic loading. All specimens had the same cross sections of the steel beam. The experimental variables were the embedded length of the steel column, whether there is the end plate at the tip of the embedded steel column, and, the arrangement of transverse reinforcement ratio surrounding the steel column. The following remarks can be drawn from the test results. 1) In case of the specimen with a short embedded length of the steel column, the punching shear failure on the upper surface of the steel beam flange was remarkable when the maximum strength was reached. However, in the specimen with long embedded length of steel column, it was not observed the punching shear failure. 2) The maximum strength increased with the embedded length of the steel column. Further, the maximum strength of the specimen with the embedded length of three times of the steel column depths is subjected to bending yield strength of the steel column. 3) It was shown that the transverse reinforcement to surround the steel column and the end plate were necessary to improve the bearing failure of the joint. 

Size effect of concrete members applied with flexural compressive stresses

2004 ◽  
Vol 126 (1) ◽  
pp. 79-102 ◽  
Author(s):  
Jang-Ho Jay Kim ◽  
Seong-Tae Yi ◽  
Jin-Keun Kim
Keyword(s):  
Size Effect ◽  
Concrete Members ◽  
Compressive Stresses

scholarly journals CONTRIBUTION OF CONCRETE TO SHEAR STRENGTH OF RC BEAMS FAILING IN SHEAR

2013 ◽  
Vol 19 (3) ◽  
pp. 400-408 ◽  
Author(s):  
Guray Arslan ◽  
Zekeriya Polat
Keyword(s):  
Shear Strength ◽  
Shear Failure ◽  
Plastic Hinge ◽  
Transverse Reinforcement ◽  
Rc Beams ◽  
Earthquake Resistant ◽  
Earthquake Resistant Structures ◽  
Shear Failures ◽  
Beam Plastic Hinge ◽  
Shear Demand

Reinforced concrete (RC) beams with light transverse reinforcement are vulnerable to shear failure during seismic response. In order to prevent brittle shear failures at beam plastic hinge regions of earthquake-resistant structures, the Turkish Earthquake Code and ACI318 require the use of sufficient transverse reinforcement to resist the total expected shear demand. These codes tend to be excessively conservative and, in some cases, the contribution of the concrete to the shear strength is neglected. The aim of this study is to investigate the contribution of concrete to shear strength of RC beams failing in shear experimentally. The beams were tested under monotonically increasing reversed cyclic loading to determine the concrete contribution to shear strength. It is observed that the concrete contribution to the shear strength at ultimate state ranges from 18% to 69% of the ultimate strength.

scholarly journals Prediction of Punching Shear Capacity of Two-Ways FRP Reinforced Concrete Slabs

2017 ◽  
Vol 5 (2) ◽  
pp. 1-7
Author(s):  
Ilker Kara ◽  
Besian Sinani
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Shear Capacity ◽  
Reinforced Concrete Beams ◽  
Punching Shear ◽  
Concrete Slabs ◽  
Design Standards ◽  
Concrete Members ◽  
Reinforced Concrete Slabs ◽  
Frp Reinforcement

An innovative solution to the corrosion problem is the use of fiber-reinforced polymer (FRP) as an alternative reinforcing material in concrete structures. In addition to the non corrodible nature of FRP materials, they also have a high strength-to-weight ratio that makes them attractive as reinforcement for concrete structures. Extensive research programs have been carried out to investigate the flexural behavior of concrete members reinforced with FRP reinforcement. On the other hand, the shear behavior of concrete members, especially punching shear of two-way slabs, reinforced with FRP bars has not yet been fully explored. The existing provisions for punching of slabs in most international design standards for reinforced concrete are based on tests of steel reinforced slabs. The elastic stiffness and bonding characteristics of FRP reinforcement are sufficiently different from those of steel to affect punching strength. In the present study, the equations of existing design standards for shear capacity of FRP reinforced concrete beams have been evaluated using the large database collected. The experimental punching shear strengths were compared with the available theoretical predictions, including the CSA S806 (CSA 2012), ACI-440.1R-15 (ACI 2015), BS 8110 (BSI 1997), JSCE (1997) a number of models proposed by some researchers in the literature. The existing design methods for FRP reinforced concrete slabs give conservative predictions for the specimens in the database. This paper also presents a simple yet improved model to calculate the punching shear capacity of FRPreinforced concrete slabs. The proposed model provides the accurate results in calculating the punching shear strengths of FRP-reinforced concrete slender slabs.

scholarly journals Shear Cap Size Selection Method Based on Parametric Analysis of ACI-318 Code and Eurocode 2 Standard

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4938
Author(s):  
Maciej Grabski ◽  
Andrzej Ambroziak
Keyword(s):  
Parametric Analysis ◽  
Load Capacity ◽  
Selection Method ◽  
Shear Capacity ◽  
Punching Shear ◽  
Transverse Reinforcement ◽  
Shear Load ◽  
Reinforced Concrete Structure ◽  
Practical Application ◽  
Eurocode 2

The scope of the paper is to propose a method for determining the size of shear caps in a slab–column-connections-reinforced concrete structure. Usually, shear heads are used to enhance slab–column connection, especially when the transverse reinforcement does not give the required punching shear load capacity. The dimensions of the shear head should provide the punching shear resistance of the connection inside and outside the enhanced region. The process of selecting the size of the shear head is iterative. The parametric analysis of the ACI 318 code and EC2 standard has the objective of indicating which control perimeter (inside or outside the shear head) has a decisive impact on the punching shear capacity of the connection. Based on the analysis, the authors propose methods for selecting the dimensions of the shear head with practical application examples. The paper is intended to provide scientists, civil engineers, and designers with guidelines to design the process of the slab–column connections with the shear caps.

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