In the present paper a new method for the evaluation of the cracking state of RC elements based on the statistical analysis of the dynamic response to a Gaussian load generated by means of an electrodynamic shaker is presented. It is based on the property that cracked RC elements having breathing cracks behave as non-linear systems and thus transform a Gaussian input into a non Gaussian output. Using the probability density function of the response (in terms of system’s displacements and velocities) and an identification procedure, the mechanical parameters of the nonlinear system have been identified. Numerical simulations of a nonlinear SDOF are presented to illustrate the capabilities of the method.
Cracking evaluation of RC structures by means of Gaussian excitation and statistical analysis
BRECCOLOTTI, Marco;MATERAZZI, Annibale Luigi
2006
Abstract
In the present paper a new method for the evaluation of the cracking state of RC elements based on the statistical analysis of the dynamic response to a Gaussian load generated by means of an electrodynamic shaker is presented. It is based on the property that cracked RC elements having breathing cracks behave as non-linear systems and thus transform a Gaussian input into a non Gaussian output. Using the probability density function of the response (in terms of system’s displacements and velocities) and an identification procedure, the mechanical parameters of the nonlinear system have been identified. Numerical simulations of a nonlinear SDOF are presented to illustrate the capabilities of the method.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
