TY - JOUR
T1 - Finite-element modeling of deformation and cracking in early-age concrete
AU - de Borst, René
AU - Van den Boogaard, A. H.
PY - 1994/1/1
Y1 - 1994/1/1
N2 - The main nonlinear phenomena that govern the deformational behavior of early-age concrete are the evolution of the stiffness properties, the development of thermal strains, creep, and cracking. A general approach for numerically simulating this type of behavior is presented. The thermomechanical problem is decoupled such that first a thermal analysis is carried out and then a stress calculation is performed. An interface program is used to map the results from the thermal analysis onto the input data required for the stress analysis. A brief review of the relations for the thermal-stress analysis is given, followed by a more elaborate treatment of the algorithm used for the combination of thermal strains, creep, and smeared cracking. To properly accommodate these effects in a finite-element analysis, a smeared-crack model is used that is rooted in a decomposition of the strain increments. The emphasis is on the general approach for properly and efficiently handling these phenomena. A special case, namely a power- type creep law, is elaborated. It is shown that this relationship reasonably fits experimental data. A detailed description of an example calculation that demonstrates the potential of the numerical simulation strategy follows.
AB - The main nonlinear phenomena that govern the deformational behavior of early-age concrete are the evolution of the stiffness properties, the development of thermal strains, creep, and cracking. A general approach for numerically simulating this type of behavior is presented. The thermomechanical problem is decoupled such that first a thermal analysis is carried out and then a stress calculation is performed. An interface program is used to map the results from the thermal analysis onto the input data required for the stress analysis. A brief review of the relations for the thermal-stress analysis is given, followed by a more elaborate treatment of the algorithm used for the combination of thermal strains, creep, and smeared cracking. To properly accommodate these effects in a finite-element analysis, a smeared-crack model is used that is rooted in a decomposition of the strain increments. The emphasis is on the general approach for properly and efficiently handling these phenomena. A special case, namely a power- type creep law, is elaborated. It is shown that this relationship reasonably fits experimental data. A detailed description of an example calculation that demonstrates the potential of the numerical simulation strategy follows.
UR - http://www.scopus.com/inward/record.url?scp=0028669682&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)0733-9399(1994)120:12(2519)
DO - 10.1061/(ASCE)0733-9399(1994)120:12(2519)
M3 - Article
AN - SCOPUS:0028669682
SN - 0733-9399
VL - 120
SP - 2519
EP - 2534
JO - Journal of Engineering Mechanics
JF - Journal of Engineering Mechanics
IS - 12
ER -