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Title: STUDIES IN SHEAR STRENGTH OF CONCRETE REINFORCED WITH TENSION STEEL
Authors: Gupta, Vikas Kumar
Keywords: CIVIL ENGINEERING;SHEAR STRENGTH;CONCRETE REINFORCED;TENSION STEEL
Issue Date: 2004
Abstract: Shear strength of concrete has been found out proposition to experimentally evaluate. This is so primarily due to the interlocking of the coarse aggregates among themselves. As a result of particle interlocking, it does not become feasible to apply the shearing action (direct shearing force) in a plane, as is customarily done in case of metals. Experiment have to be, therefore devised to indirectly asses the shear strength of concrete. In one of the popularly adopted devices, a beam of appropriate length is subjected to shearing and bending actions under four-point loading system (two active and two passive forces). The beam segment subjected to constant shear is referred to as shear span, which offers itself to be studied for performance under shear, bending being negligible for short shear span. In the present study, such a device has been adopted to study the performance of concrete under shearing action. Plain concrete is found to be incapable of sustaining tensile stresses even due to its own dead load. As a result, experiments have to be carried out on beams with steel bars in the tension zone, making it a reinforced concrete as against pure plain concrete. It is an acceptable proposition since all structural elements using concrete are essentially in reinforced concrete. The presence of steel bars introduces a new factor in shear resisting capacity of concrete. This is referred to as dowel action and substantially contributes to shear resisting capacity of concrete. The other contributing factors are compressive strength of concrete, size of the beam section, particularly the depth, and the strength and surface characteristics of the steel bars. It is, therefore, imperative to study the impact of such contributing factors for their dominating or otherwise effects. In the present Dissertation work, a number of suitable combinations of concrete (Cement content 360, 380, 400, and 415 kg/m3 ) and longitudinal tension steel (TMT bars of 8, 10, 12 and 16 mm dia.) are to be adopted with a view to covering a wide spectrum of concrete strength in shear. With these results being available after testing, attempts will be made to identify the parameters having significant influence on the shear strength of concrete. Also, plausible inferences will be drawn with respect to the experimental results based on relevant discussion..
URI: http://hdl.handle.net/123456789/7452
Other Identifiers: M.Tech
Research Supervisor/ Guide: Prasad, Jagdish
metadata.dc.type: M.Tech Dessertation
Appears in Collections:MASTERS' THESES (Civil Engg)

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