Abstract: In this paper, a simple 1D crowd model is proposed, which aim is to properly describe the
crowd-flow phenomena occurring when pedestrians walk on a flexible footbridge. The crowd is
assumed to behave like a continuous compressible fluid and the pedestrian flow is modeled in a 1-D
framework using the (total) mass (of pedestrians) conservation equation. This crowd model is then
coupled with a simple model for the dynamical behavior of the footbridge and an optimized
modeling of synchronization effects is performed. Numerical simulations are presented to show
some preliminary results.
Abstract: A damage detection method based on harmonic structural vibrations has been applied to
reconstruct realistic damage patterns of reinforced concrete beams. It was shown that the application
of a hybrid method (genetic algorithm and Levenberg-Marquardt minimization technique) makes it
possible to effectively reconstruct the flexural stiffness drops as small as 10-20% with the maximum
error of 4%. The error increases to about 7 to 9% with the presence of 1% measurement noise.
Abstract: In this paper the authors present a new one-dimensional phenomenological model of the
magnetic shape memory effect (MSME) observed in magnetic shape memory alloys (MSMAs). The
model takes into account elementary processes associated with the magnetisation of MSMAs. Its
correctness has been checked against selected models known from the literature. The model
developed by the authors has been verified in the case of a rod element made out of a MSMA by the
use of the finite element method (FEM). A study on the influence of activation of MSMA beam
actuators in the case of forced vibration of a composite beam has been performed. The authors have
also carried out investigation connected with the influence of a transverse and open crack on the
effectiveness of vibration reduction in the case of a composite beam by the use of MSM actuators.