Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Crack development in concrete structures due to imposed strains—Part I: Modelling
Abstract In the present paper, a technique for the modelling of crack development in reinforced concrete structures exposed to imposed deformations is described. In a second paper, parametric studies are performed for a wall fully restrained at the base. The objective of this research is to improve the control of cracking in engineering design. A two-dimensional Finite Element model with fournode elements is used to simulate concrete. Closing forces in cracks are modelled with spring elements. The spring stiffness is estimated from bond stress—slip relations for reinforcement and tension softening of concrete. Yield of reinforcement is also included in the model. Temperature change is used as load and the calculations are performed stepwise with opening of nodes and implementation of spring elements. It is shown that tensile softening of concrete can be neglected but multiple cracking must be considered in the calculations. The progression of cracking in the structure is simulated in the analysis. Results are given in terms of development of crack width with increasing temperature load. The crack widths approach an upper limit for large temperature loading. The proposed model can also be adapted to other structures and restraints.
Crack development in concrete structures due to imposed strains—Part I: Modelling
Abstract In the present paper, a technique for the modelling of crack development in reinforced concrete structures exposed to imposed deformations is described. In a second paper, parametric studies are performed for a wall fully restrained at the base. The objective of this research is to improve the control of cracking in engineering design. A two-dimensional Finite Element model with fournode elements is used to simulate concrete. Closing forces in cracks are modelled with spring elements. The spring stiffness is estimated from bond stress—slip relations for reinforcement and tension softening of concrete. Yield of reinforcement is also included in the model. Temperature change is used as load and the calculations are performed stepwise with opening of nodes and implementation of spring elements. It is shown that tensile softening of concrete can be neglected but multiple cracking must be considered in the calculations. The progression of cracking in the structure is simulated in the analysis. Results are given in terms of development of crack width with increasing temperature load. The crack widths approach an upper limit for large temperature loading. The proposed model can also be adapted to other structures and restraints.
Crack development in concrete structures due to imposed strains—Part I: Modelling
Pettersson, D. (Autor:in) / Thelandersson, S. (Autor:in)
2001
Aufsatz (Zeitschrift)
Englisch
Crack development in concrete structures due to imposed strains—Part I: Modelling
| Springer Verlag | 2001
Crack development in concrete structures due to imposed strains - Part I: Modelling
| British Library Online Contents | 2001
| British Library Online Contents | 2002