Search results for " high-strength concrete"

showing 3 items of 3 documents

Analytical model for high-strength concrete columns with square cross-section

2008

In the present paper a mechanical model to predict the compressive response of high strength short concrete columns with square cross-section confined by transverse steel is presented. The model allows one to estimate the equivalent confinement pressures exercised by transverse steel during the loading process taking into account of the interaction of the stirrups with the inner core both in the plane of the stirrups and in the space between two successive stirrups. The lateral pressure distributions at hoop levels are obtained by using a simple model of elastic beam on elastic medium simulating the interaction between stirrups and concrete core, including yielding of steel stirrups and dam…

EngineeringPlane (geometry)business.industryMechanical EngineeringBuilding and ConstructionStructural engineeringCompression (physics)Stirrupcompression high-strength concreteStress (mechanics)Core (optical fiber)Transverse planeSettore ICAR/09 - Tecnica Delle CostruzioniBrittlenessMechanics of MaterialsbusinessElastic modulusCivil and Structural Engineering
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Shear strength of High-strength concrete beams: modeling and design recommendations

2014

Abstract In the present paper, the flexural and the shear resistance of high strength reinforced concrete (HSC) beams with longitudinal bars, in the presence of transverse stirrups is analyzed both theoretically and experimentally. The experimental researches here presented are parts of previous researches carried out by the author. Researches refer to HSC beams with high percentages of steel bars failing in shear and in flexure. From the analytical point of view, a model based on the evaluation of the resistance contribution due to beam and arch actions including bond splitting and concrete crushing failure modes is developed and presented. The model was verified against available experime…

EngineeringShear–moment interaction; High-strength concrete; Shear resistance; Flexural resistance; Analytical modelingShear–moment interactionbusiness.industryShear resistanceStructural engineeringTransverse planeAnalytical modelingSettore ICAR/09 - Tecnica Delle CostruzioniShear resistanceShear (geology)Flexural strengthHigh-strength concreteGeotechnical engineeringFlexural resistanceModeling and designArchbusinessBeam (structure)Civil and Structural EngineeringHigh strength concrete
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Flexural and Shear Resistance of High Strength Concrete Beams

2014

In the present paper, an analytical model is proposed that is able to determine the shear resistance of high strength reinforced concrete beams with longitudinal bars, in the presence of transverse stirrups. The model is based on the evaluation of the resistance contribution due to beam and arch actions. For the resistance contribution of the main bars in tension the residual bond adherence of steel bars and the crack spacing of R.C. beams are considered. The compressive strength of the compressed arch is also verified by taking into account of the biaxial state of stresses. The model was verified on the basis of experimental data available in the literature and it is able to include the fo…

Settore ICAR/09 - Tecnica Delle CostruzioniShear ResistanceShear-Moment InteractionShear-Moment Interaction; High-Strength Concrete; Shear Resistance; Flexural ResistanceHigh-Strength ConcreteFlexural Resistance
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