PAGNINI , Luisa

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The paper gathers and analyses the results of many experimental tests performed on real structures excited by the wind. The comparison between experimental values of the along wind response and the values calculated by using the measured parameters testifies and quantifies the reliability of the calculation model, once the parameters are...

The structural effects induced by the wind constitute a stochastic process which depends, in turn, on the wind, the structure and the aerodynamic parameters. Structural verifications usually consider statistical moments of the process, such as the mean maximum or standard deviation, or its maximum value. Since the estimate of the parameters is...

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The gust-excited response of structures is usually evaluated by an equivalent static load defined as the product between the wind-induced mean static force and a gust factor calibrated on maximum displacements. Advanced formulations provide the 3-D response using gust factors calibrated on the generic effect investigated, rather than refer only...

Although piezoelectric transducers are employed in a variety of fields, their application for vibration control of civil or industrial structures has not yet been fully developed, at the best of authors' knowledge. Thanks to a new generation of ever more performing piezoceramic materials and to the recent development of scientific proposals...

The analysis of wind actions and effects on structures involves the knowledge of the parent population and extreme value distributions of the mean wind velocity. In spite of an impressive amount of measurements, refined probabilistic models and detailed applications to the study of specific sites, there is an equally disheartening lack of...

Classical serviceability criteria for wind-induced accelerations are discussed pointing out their conventional character and unreliability due to the uncertain knowledge of structural damping. A theoretical frame of some advanced probabilistic criteria is given showing that, in this context, damping uncertainties can be easily taken into...

The paper investigates a selected data base acquired by anemometric stations spread on the Italian country. Wind velocity measures have been recorded for about fifty years. The analysis points out notable connections between the statistical parameters of current and extreme wind velocities. As far as the current values are concerned, a model of...

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Literature on turbulence modeling is rich in empirical, semi-empirical and theoretical spectral equations whose parameters assume deterministic values. Starting from a critical review of the state of the art, a unitary model of the 3-D atmospheric turbulence was proposed where all parameters are defined by first and second order statistical...

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The dynamic response of bridge piers with aseismic devices to earthquake excitation is evaluated by the stochastic equivalent linearization technique. The seismic acceleration is schematized through a Gaussian stationary random process. The pier is linear elastic, the span is idealized as a rigid mass, the device restoring force is represented...

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In thispaper,thedebatesandthestudiescarriedoutinthe first halfoftheXXcenturyonthedynamic response oftwoslendermasonrystructurestowindactionsarepresented.ThetwobuildingsaretheSt. Gaudenzio BasilicainNovaraandtheMoleAntonellianainTurin,bothdesignedbytheItalianArchitect Alessandro...

The evolution in the constructional field and the realization of ever more slender and light structures have emphasized the increasing difficulty of properly evaluating the actions and effects of wind on poles and monotubular towers. Faced with this situation the Italian constructors, united in a consortium coordinated by ACS ACAI Servizi,...

This paper develops a unified procedure for dealing with gust-excited vibrations and aeroelastic phenomena on slender structures and structural elements in the framework of the Generalized Gust Factor technique. The structure is arbitrarily inclined and constrained, and excited on its fundamental mode. Galloping phenomenon is taken into account...