Abstract
An analytical method using the incremental formulation is presented for the analysis of nonlinear and time-dependent behavior of reinforced concrete beams and columns. Considering one-dimensional stress and strain states the beam theory is used for member behavior, and the stress-strain law for the concrete material is based on the rheology model in consideration of creep, cracking and shrinkage strain. A composition of the model and the elasto-plastic element taking into account crack are shown in Fig.1 and Fig.3 respectively. The number of elements included K-model and N-model, and the estimating method of model's constants are mentioned in (Section 3). The numerical computations are compared with the experimental results such as the creep behavior, relaxational behavior of beams in (Section 4.1, 4.2) and the creep buckling of eccentrically loaded columns in (Section 4.3). In addition, creep properties of a bond between the concrete and reinforcement are discussed in (Section 4.4). The obtained results are satisfactory on the accuracy within applied limits of the beam theory from the engineering point of view.
