1,721,268 research outputs found
Experimental modal analysis for damage detection of buildings via gabor transform technique
No full textThe paper presents the revised formulation of a signal processing methodology aimed at identifying the dynamics of buildings hit by earthquakes. The methodology is based on the Gabor joint time-frequency representation and allows to identify an evolutionary modal model whose time changes are used to evaluate the damage presence and severity. Dynamic tests are performed in advance to provide reference values and their confidence ranges used for the assessment of the results. The methodology has been extensively applied to the buildings belonging to the Italian national network of seismic structural monitoring. A sample application referred to a representative reinforced concrete buildings is shown
A new procedure for detecting nonlinearity from transient data using the Gabor transform
No full textApplication of smart strategies against severe dynamic actions
No full textThe research described in this paper on the application of active and semi-active structural control in the protection of structures against severe dynamic actions aims at demonstrating the effectiveness of these techniques and also the importance of the use of smart devices. These special devices need a robust control law which should permit to exploit all their innovative performance characteristics. In the paper a study concerning a comparison among different control approaches is presented: the cases of mass damping system and coupled structures are analyzed. Also, some hints for device design are given. In the examined models a wide simulation analysis has shown the achievement of a very satisfying performance. The research results demonstrate that semi-active control based on smart devices and a proper algorithm offer the reliability of purely passive systems, keeping however both capabilities and flexibility of fully active systems
Experimental Modal Analysis for Damage Detection of Buildings via Gabor Transform Technique
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