Serviceability Analysis of Reinforced Concrete Members Based on Stress Transfer Approach

Abstract

In present study, the stress transfer approach for deformation and cracking analysis of tensile reinforced concrete members is investigated. Stress transfer model which is able to take into account stochastic distribution of mechanical properties of concrete was developed. As numerically obtained results are principally governed by the bond-slip function used, a sensitivity analysis is performed examining the well known bond models and their influence on prediction results of the development of cracks and overall deformation. It has been shown that modeling deformation behavior of cracked reinforced concrete, satisfactory results can be achieved for a large range of possible bond stress-slip relationships. However crack spacing and width predictions are highly sensitive to the assumed bond model.

Damage of bond in reinforced concrete: A detailed finite element analysis

“…The stress transfer algorithm was adapted from 46 and is briefly described by the following steps: The analysis was started at mid‐section of the tie with the known boundary conditions: bond stress and slip were assumed to be zero. A particular reinforcement strain value ε 0 i is assumed at the mid‐section, corresponding to the load F i . The analysis proceeded towards the loaded end of reinforcement using steps of a finite length.…”

Serviceability Analysis of Steel Fibre Reinforced Concrete Beams

“…As it was shown in the research performed by Salem & Maekawa (1999), Jakubovskis et al (2013) and , due to the damage of concrete close to the crack section bond deterioration occurs. The parts affected by the damage of bond are further called the damage zones.…”

“…These models may be subdivided into such categories: stress-transfer approaches, fracture mechanics models and average stress-average strain approaches (Gribniak et al 2013b). For the analysis of serviceability limit state, models based on stress-transfer (also called force transfer, or partial interaction) approach appear to be a reasonable alternative to commonly used code techniques, as it realistically predicts the cracking behaviour of reinforced concrete, bond-slip mechanics and the effect of tension stiffening (Jakubovskis et al 2013, Sokolov et al 2016.…”

“…The parts affected by the damage of the bond are further called as the damage zone. A number of damage zone models defined in the literature (Jakubovskis et al 2013 show that the length of the damage zone is related to the diameter of the steel bar reinforcement as well as the load level. The stress-transfer model developed in this thesis considers the bond-slip relationship given in Model Code 2010 (fib 2013).…”