The effect of self-consolidating concrete on the shear behaviour of concrete beam elements

2021 ◽  
Author(s):  
◽  
Matthew Hourigan
Keyword(s):  
Concrete Beam ◽  
Shear Behaviour ◽  
Self Consolidating Concrete ◽  
Beam Elements

Modeling the operation of structures made of dispersed-reinforced concrete with an alternating dynamic load of high intensity

2021 ◽  
Vol 14 (3) ◽  
pp. 36-44
Author(s):  
S. Nikolenko ◽  
Svetlana Sazonova ◽  
Viktor Asminin
Keyword(s):  
Reinforced Concrete ◽  
Dynamic Load ◽  
High Intensity ◽  
Concrete Beam ◽  
Static Load ◽  
Dynamic Compression ◽  
Experimental Studies ◽  
Reinforced Concrete Beam ◽  
Beam Elements ◽  
Laminated Structures

A study of the properties of dispersed-reinforced concrete and a study of the effect of dispersed reinforcement on the operation of structures was carried out, mainly with a static load of the same sign. Based on the results of experimental studies, a comparison was made of the work of dispersed-laminated structures under alternating dynamic action of high intensity with the work of reinforced concrete beam elements under similar influences. The results of experimental studies of cubes and prisms for static and dynamic compression are also presented. The results of experimental studies allow us to conclude that there is a significant effect of dispersed reinforcement on the operation of structures under the investigated influences and the feasibility of combined reinforcement of structures. The use of dispersed reinforcement in structures will increase the resistance of structures to such influences.

Shear and flexural behaviour of lightweight self-consolidating concrete beams

2021 ◽  
Author(s):  
Kokilan Sathiyamoorthy
Keyword(s):  
Shear Strength ◽  
Crack Width ◽  
Concrete Beams ◽  
Shear Resistance ◽  
Normal Weight ◽  
Shear Behaviour ◽  
Flexural Behaviour ◽  
Self Consolidating Concrete ◽  
Shear Span ◽  
Flexural Performance

Shear and flexural behaviour of lightweight self-consolidating concrete (LWSCC) beams made of slag aggregates were investigated. Shear reinforced LWSCC beams showed similar shear behaviour compared to their non-shear reinforced counterparts until the formation of diagonal cracks but higher ultimate shear resistance and ductility. Compared to normal weight self-consolidating concrete (SCC) ones, non-shear reinforced LWSCC beams showed lower post-cracking shear resistance. Shear strength of LWSCC/SCC beams increased with the decrease of shear span to depth ratio. LWSCC beams showed higher number of cracks and wider crack width at failure than their SCC counterparts. LWSCC beams developed higher number of cracks with wider crack width at failure compared with their SCC counterparts. American, Canadian and British Codes were conservative in predicting shear strength of shear/non-shear reinforced LWSCC beams. LWSCC beams (with slag aggregate) showed good shear resistance compared with those made of other types of aggregates besides satisfactory flexural performance.

scholarly journals Shear force and torsion in reinforced concrete beam elements: theoretical analysis based on Brazilian Standard Code ABNT NBR 6118:2007

2012 ◽  
Vol 5 (5) ◽  
pp. 576-595
Author(s):  
R. Barros ◽  
J.S. Giongo
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Reinforced Concrete Beams ◽  
Transverse Reinforcement ◽  
Hollow Section ◽  
Beam Elements ◽  
Space Truss ◽  
Standard Code ◽  
Brazilian Standard

Reinforced concrete beam elements are submitted to applicable loads along their life cycle that cause shear and torsion. These elements may be subject to only shear, pure torsion or both, torsion and shear combined. The Brazilian Standard Code ABNT NBR 6118:2007 [1] fixes conditions to calculate the transverse reinforcement area in beam reinforced concrete elements, using two design models, based on the strut and tie analogy model, first studied by Mörsch [2]. The strut angle θ (theta) can be considered constant and equal to 45º (Model I), or varying between 30º and 45º (Model II). In the case of transversal ties (stirrups), the variation of angle α (alpha) is between 45º and 90º. When the equilibrium torsion is required, a resistant model based on space truss with hollow section is considered. The space truss admits an inclination angle θ between 30º and 45º, in accordance with beam elements subjected to shear. This paper presents a theoretical study of models I and II for combined shear and torsion, in which ranges the geometry and intensity of action in reinforced concrete beams, aimed to verify the consumption of transverse reinforcement in accordance with the calculation model adopted As the strut angle on model II ranges from 30º to 45º, transverse reinforcement area (Asw) decreases, and total reinforcement area, which includes longitudinal torsion reinforcement (Asℓ), increases. It appears that, when considering model II with strut angle above 40º, under shear only, transverse reinforcement area increases 22% compared to values obtained using model I.

Joint shear behaviour of reinforced concrete beam–column connections

2009 ◽  
Vol 61 (2) ◽  
pp. 119-132 ◽  
Author(s):  
J. Kim ◽  
J.M. LaFave ◽  
J. Song
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Shear Behaviour ◽  
Joint Shear

scholarly journals Effects of drying shrinkage of concrete on shear behaviour of reinforced concrete beam

◽  
2019 ◽  
Author(s):  
Hikotsugu Hyodo ◽  
◽  
Ryoichi Sato ◽  
Kenji Kawai ◽  
Ken-ichiro Nakarai ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Drying Shrinkage ◽  
Reinforced Concrete Beam ◽  
Shear Behaviour

Effects of Aggregate Size on Concrete Shear Strength

2014 ◽  
Vol 970 ◽  
pp. 143-146
Author(s):  
Lau Teck Leong ◽  
Chen Zhe ◽  
Abdullahi Ali Mohamed ◽  
Wee Kang Choong
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Concrete Beam ◽  
Concrete Structures ◽  
Aggregate Size ◽  
Shear Behaviour ◽  
Maximum Aggregate Size ◽  
Small Scale ◽  
Reinforced Concrete Structures ◽  
Normal Concrete

In view of the importance of the applicability of small-scale beam specimens in replicating the shear behaviour of prototype reinforced concrete structures, this study was conducted on beam specimens cast with micro-concrete having scaled aggregates (maximum sizes: 10mm, 5mm, and 2mm) to investigate whether the use of micro-concrete impose any reduction in their shear strength. The results indicate the maximum aggregate size (s) has negligible effects on concrete shear strength, and the micro-concrete beam specimens replicate the shear behaviour of normal concrete.

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