Numerical simulation of limit-state concrete behaviour loaded in compression

Limit-state behaviour of concrete is influenced strongly by a multiaxial stress state. Taking this influence into account in finite element analysis is the subject of much current research. In this paper two numerical models are discussed, one describing concrete on a micro-scale and one on a macro-scale

Concrete in Multi-Axial Compression - a multi-level analysis

The macroscopic mechanical behaviour of concrete, observed in multiaxial compression tests, is classified according to four typical stages in crack formation. At these stages, the behaviour is analysed at three different scale levels. It appears that most of the observed macroscopic features can be explained by quite simple phenomena when the concrete structure is analysed at the level of aggregate grains embedded in a matrix of cement paste. Based on this analysis, a 2D meso-mechanical model is presented aiming at describing the pre-peak mechanical behaviour of concrete in multiaxial compression tests

Numerical simulation of limit-state concrete behaviour loaded in compression

Limit-state behaviour of concrete is influenced strongly by a multiaxial stress state. Taking this influence into account in finite element analysis is the subject of much current research. In this paper two numerical models are discussed, one describing concrete on a micro-scale and one on a macro-scale

Softening behaviour of concrete : numerical research

Experimental research shows, apart from the influence of multiaxial loading conditions, that softening of concrete loaded in compression is accompanied by localization of deformations. Therefore, numerical modelling of concrete material behaviour has to take this effect into account. This implies that numerical simulations of laboratory tests not only have to result in realistic force - desplacement relations in all directions, but also have to result in realistic crack patterns. The consequences of these requirements with regard to numerical modelling of concrete softening behaviour in compression, is further expounded. As a result, special attention will be given to numerical modelling strategies on different scale levels