Testing, Modelling and Numerical Analysis of the Mechanical Behaviour of Bituminous Concrete

摘要

The main aim of this study is to develop a constitutive model for bituminous concrete. This material model should be able to describe the most important types of behavior of the material in practical situations. In practice, bituminous concrete serves as a load-bearing layer or a protection layer on a granular sub-base. The hydraulic engineering, where the material is used, for instance, to protect embankments, one can distinguish between short and long loading times. Wave attack on revetments of embankments is an example of rapid loading whilst uplift of a revetment can be caused by much slower tidal movements. In road engineering both short-term and long-term loading also occur. Loading by moving traffic is an example of short term loading. On a parking-lot loading times are much longer. Compared to hydraulic structures, road structures are subjected to relatively high loads. The constitutive model should take this variety of load situations into account. The second aim is to develop numerical procedures and implement these procedures in a finite element program (PLAXIS) which can be used for the analysis of practical structures.