Prediction of the Rupture of Circular Sections of Reinforced Concrete and Fiber Reinforced Concrete

Abstract

As part of this study, has been developed a numerical method which allows to establish abacuses connecting the normal force with bending moment for a circular section and therefore to predict the rupture of this type of section. This may be for reinforced concrete (traditional steel) or concrete reinforced with steel fibers. The numerical simulation was performed in nonlinear elasticity up to exhaustion of the bearing capacity of the section. The rupture modes considered occur by plasticization of the steel or rupture of the concrete (under compressive stresses or tensile stresses). Regarding the fiber-reinforced concrete, the rupture occurs, usually, by tearing of the fibers. The behavior laws of the different materials (concrete and steel) correspond to the real behavior. The influence of several parameters was investigated, namely; diameter of the section, concrete strength, type of steel, percentage of reinforcement and contribution of concrete in tension between two successive cracks of bending. A comparison was made with the behavior of a section considering the conventional diagrams of materials; provided by the BAEL rules. A second comparative study was performed for fibers reinforced section.

Pull-Out Behaviour of Hooked End Steel Fibres Embedded in Ultra-high Performance Mortar with Various W/B Ratios

“…The addition of randomised short fibres into mortar has shown to be capable of controlling crack progression as well as resisting tensile stresses (Adjrad et al 2016;Hwang et al 2016;El-Mal et al 2015;Sorensen et al 2014;Islam and Alam 2013a, b;Romualdi et al 1968). The efficiency of fibres in transferring applied stresses is greatly dependent on the fibre-matrix interface properties of fibre reinforced concrete (FRC) (Abdallah et al 2016;Dinh et al 2016;Lu et al 2016;Tadepalli et al 2015).…”

Post-tensioned concreting: its suitability for and acceptability in Sri Lanka

“…Conventional RF concrete is widely used in the construction industry because of its many advantages, some of which are listed below: Durability : Structures built with concrete will last for more than 60 years, requiring little repair or maintenance work (Dias, 2003). High compressive strength : RF concrete can withstand higher loads than concrete (Adjrad et al , 2016). Long service life and low maintenance cost : Concrete provides a hard, durable wearing surface that resists weathering extremely well (Bartolini and Warhol, 2012).…”

“…High compressive strength : RF concrete can withstand higher loads than concrete (Adjrad et al , 2016).…”

Comparisons Between Pull-Out Behaviour of Various Hooked-End Fibres in Normal–High Strength Concretes

“…Plain concrete is characterised by its brittle behaviour in tension (Zendaoui et al 2016;Abdallah et al 2018a, b). Steel fibres incorporated are dispersed within the concrete in order to improve its ductility, tensile behaviour and impact resistance (Tadepalli et al 2013;Adjrad et al 2016;Abdallah et al 2018a, b). Of these the greatest advantage of including steel fibres in the concrete is to impart ductility to an otherwise brittle material.…”