A new model for predicting crack width with different percentages of reinforcement and concrete strength classes

Abstract

A B S T R A C T R I~ S U M I~This paper describes a new model for predicting crack width in presence of different percentages of reinforcement and concrete strength classes that became from 30 to 80 MPa.The theoretical analysis is used to interpret the results of experimental trials on reinforced concrete ties submitted to tensile forces without inducing any yield in the bar.The purpose of the investigation was to study and predict the crack width using as base parameters the stress in the steel at crack and the mean distance between cracks. The calculation model is based also on a precise mechanical characterization of the concrete's effective tensile strength (i.e. in presence of reinforcement) and give a sufficiently user friendly procedure to determine crack width without taking into account the concrete and steel deformation, which are difficult to measure. Cet article prdsente un nouveau module de prdvision de l'amplitude des fissures en prdsence de diff&ents pourcentages d'armatures et de classe de rdsistance allant de

Crack width evaluation in FRP reinforced concrete members

“…In previous papers [21][22][23][24], it was demonstrated that the average concrete-reinforcement slip S(x)averag e that develops between two cracks in a reinforced concrete tie (see Fig. 1), can be established from the following equation, already explained for a theoretical point of view in the paper published in RILEM Journal, [23], to which the reader can refer for more in-depth considerations on the analytical model:…”

“…1), can be established from the following equation, already explained for a theoretical point of view in the paper published in RILEM Journal, [23], to which the reader can refer for more in-depth considerations on the analytical model:…”

“…forcement, the modulus of elastlcW of the reinforcement, and the semi-distance between two cracks, [23]. Also S,x,~e~ a e is affected by r (the dimensionless stress in .~ ) g the reinforcement at a crack locanon) and y (the dimensionless parameter accounting for the tension stiffening effect of concrete), [22].…”

Comparative Analytical Study on Crack Width of Reinforced Concrete Structures

“…At the Center for Infrastructure Engineering and Safety (CIES), Hussain et al [8] performed a long-term experiment to bring the impact of long-term effects, such as concrete creep and shrinkage, on concrete cracking into focus. Creazza and Russo [9], Chiu et al [10] and Hamrat et al [11] explored the bending crack creation of beams of high-strength reinforced concrete (HSRC). Allam et al [12] proposed five rectangular reinforced concrete models to theoretically analyze the provisions of codes within certain equations that some researchers had found.…”

Effect of Recycled Aggregate Quality on the Bond Behavior and Shear Strength of RC Members

“…In the field of civil engineering, concrete is always reinforced with steel rebar, and the bond strength and interacting behaviors between the concrete and steel rebar are among the most important requirements of reinforced concrete (RC) design and construction. The bond behavior of concrete is controlled by the concrete type, rebar arrangement, loading conditions, and construction details [8]. The bonding strength between natural and recycled aggregate concrete and rebar are similar, although the compressive strength exhibits a downward trend with increases in the recycled coarse aggregate replacement ratio [9].…”