Effect of orientation of stirrups in combination with shear span to depth ratio on shear capacity of RC beams.
TL;DR: In this paper, the effect of the orientation of stirrups on the shear capacity of reinforced concrete (RC) beams was investigated and the contribution of concrete compressive strength was also studied.
About: This article is published in Heliyon.The article was published on 2021-10-01 and is currently open access. It has received 6 citations till now. The article focuses on the topics: Shear (sheet metal) & Compressive strength.
Citations
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TL;DR: In this paper , a finite element (FE) modeling method has been proposed and successfully demonstrated to validate circular reinforcement concrete (RC) members' responses to the effect of an asymmetrical lateral impact span train collision.
2 citations
TL;DR: In this article , the authors found that the beams strengthened with and without BFRP strips fails in shear for L/d ratio 2.5 and the enhancement of the shear capacity of strengthened beams ranges from 5 % to 20 %.
Abstract: • Shear on beam is defined as the internal shear stress of a beam caused by the shear force applied to the beam.
• The fiber reinforced polymer (FRP) has arisen as a promising material for shear strengthening of RCC structures due to their superior qualities such as high specific strength, better fatigue and chemical resistance.
• This resistance to sliding or resistance to forces that are parallel to the beam surface, generates a shear stress within the material.
• Basalt fiber has possessed high tensile strength, better chemical and heat resistance which is higher than that of steel fiber.
• The study finds that the beams strengthened with and without BFRP (basalt fiber reinforced polymer) strips fails in shear for L/d ratio 2.5 and the enhancement of the shear capacity of strengthened beams ranges from 5 % to 20 %.
TL;DR: In this article , a study about self-compacting concrete utilizing ground granulated blast furnace slag and fly ash, metakaolin's known as ternary blend as the cement replacement in M25grade of concrete.
TL;DR: In this paper , a review paper is mainly used on several features of RC retrofitted concrete beams such as strengthening of concrete beams by suitable retrofitting techniques, to extend the fatigue life of the structural element and eliminate the crack growth rate.
Abstract: Experimental investigations on retrofitting of RC beams over the past thirty-five years using FRP techniques have been clearly developed the potential use of different fibre reinforced polymer fabric for improving the flexural strength, toughness index and shear strength of reinforced cement concrete beams. In recent years among the different techniques of rehabilitation of existing structures, Basalt Fibre Reinforced Polymer (BFRP) as an external bonding has been considered as a popular one. This review paper is mainly to used on several features of RC retrofitted concrete beams such as strengthening of concrete beams by suitable retrofitting techniques, to extend the fatigue life of the structural element and eliminates the crack growth rate.
01 Jan 2023
TL;DR: In this article , the authors describe a scenario where a group of people are trying to find a suitable solution to a problem caused by the lack of resources in the field of information technology.
Abstract: 本論文では，実験計画法に基づく数値実験により，鉄筋コンクリート（RC）はりのせん断破壊挙動のばらつきを再現するとともに，分散分析と応答曲面法をそれぞれ適用することで，RC はりのせん断破壊における挙動のばらつき要因を定量的に検討する．はじめに，RC はりの 4 点曲げ試験に対して，直交配列表を用いた 4 元配置数値実験を行い，実験と同様のせん断破壊における挙動のばらつきを再現する．次に，数値実験の結果に対して分散分析を適用することにより，RC はりのせん断破壊における挙動のばらつき要因を定量的に示す，さらに，応答曲面法を用いて同様の検討を行い，RC はりのせん断破壊における挙動のばらつきは，コンクリートの材料強度の違いが要因であることを定量的に示す．
References
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TL;DR: The additive model of shear strength of reinforced concrete (RC) members, i.e., the sum of the contribution from concrete (Vc) and that from transverse reinforcement (Vs), has been widely accepted in the literature and engineering practice as mentioned in this paper.
69 citations
TL;DR: In this article, the authors investigated the shear failure mechanism and shear capacity in longitudinally reinforced concrete beams without transverse reinforcement and found that the effective length-to-depth ratio and a beam size are important parameters which significantly affect the failure mode in the investigated members.
31 citations
01 Jan 2013
TL;DR: In this paper, four different types of shear reinforcement are investigated; traditional stirrups, welded swimmer bars, bolted swimmer bars, and u-link bolted swimmers.
Abstract: This study focuses on the use of different types of shear reinforcement in the reinforced concrete beams. Four different types of shear reinforcement are investigated; traditional stirrups, welded swimmer bars, bolted swimmer bars, and u-link bolted swimmer bars. Beam shear strength as well as beam deflection are the main two factors considered in this study. Shear failure in reinforced concrete beams is one of the most undesirable modes of failure due to its rapid progression. This sudden type of failure made it necessary to explore more effective ways to design these beams for shear. The reinforced concrete beams show different behavior at the failure stage in shear compare to the bending, which is considered to be unsafe mode of failure. The diagonal cracks that develop due to excess shear forces are considerably wider than the flexural cracks. The cost and safety of shear reinforcement in reinforced concrete beams led to the study of other alternatives. Swimmer bar system is a new type of shear reinforcement. It is a small inclined bars, with its both ends bent horizontally for a short distance and welded or bolted to both top and bottom flexural steel reinforcement. Regardless of the number of swimmer bars used in each inclined plane, the swimmer bars form plane-crack interceptor system instead of bar-crack interceptor system when stirrups are used. Several reinforced concrete beams were carefully prepared and tested in the lab. The results of these tests will be presented and discussed. The deflection of each beam is also measured at incrementally increased applied load.
11 citations
TL;DR: In this paper, a parametric analysis of the shear resistance to crushing of the compressive struts as a function of their inclination angle has been carried out, where three different approaches have been used in order to limit stresses in the struts.
Abstract: In the current European Code EN 1992-1-1 a truss model with variable inclination angle of concrete compressive struts with a quite wide range of inclination angle, from 21, 8 degrees to 45degrees, is intended for use for shear design of reinforced concrete beams However, some researches and recommendations indicate special attention when choosing the lower bound of inclination angle of the concrete compressive struts, due to the reduced compressive strength of cracked concrete This work reviews theoretical background and shear design methods of reinforced concrete beams Relation of the shear resistance to crushing of the compressive struts as a function of their inclination angle has been investigated through a parametric study, where three different approaches have been used in order to limit stresses in the compressive struts Based on the comparison of results from the analysis a recommendation for shear resistance calculation of reinforced concrete beams in dependence on concrete strength in compressive struts of the truss model is given
8 citations