Steel fiber reinforced concrete pipes. Part 2: Numerical model to simulate the crushing test

Resumo

This paper is part of an extensive work about the technological development, experimental analysis and numerical modelling of steel fiber reinforced concrete pipes. The first part (“Steel fiber reinforced concrete pipes. Part 1: technological analysis of the mechanical behaviour”) dealt with the technological development of the experimental campaign, the test procedure and the discussion of the structural behaviour obtained for each of the dosages of fiber used. This second part deals with the aspects of numerical modelling. In this respect, a numerical model called MAP, which simulates the behaviour of fiber reinforced concrete pipes with medium-low range diameters, is introduced. The bases of the numerical model are also mentioned. Subsequently, the experimental results are contrasted with those produced by the numerical model, obtaining excellent correlations. It was possible to conclud that the numerical model is a useful tool for the design of this type of pipes, which represents an important step forward to establish the structural fibers as reinforcement for concrete pipes. Finally, the design for the optimal amount of fibers for a pipe with a diameter of 400 mm is presented as an illustrating example with strategic interest.