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Dive into the research topics where Ferdinando Laudiero is active.

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Featured researches published by Ferdinando Laudiero.


Journal of Composites for Construction | 2014

Buckling and Postbuckling Finite-Element Analysis of Pultruded FRP Profiles under Pure Compression

Ferdinando Laudiero; Fabio Minghini; Nerio Tullini

Results of nonlinear finite-element analyses of commercial pultruded fiber-reinforced plastic (PFRP) I-section profiles subjected to pure compression are presented. One narrow flange and four wide flange shapes are analyzed for 10 values of the column slenderness, involving 50 finite-element (FE) models. The imperfection sensitivity is investigated with reference to different imperfection shapes. For wide flange columns, if the imperfection amplitudes are identified with the limiting amplitudes reported by the pultruders, extremely low ultimate axial loads are obtained, associated with unrealistic failure mechanisms and strong interaction between local and global buckling modes. In contrast, reduced imperfection amplitudes reported in the literature lead to well documented failure mechanisms and to a small influence of the buckling mode interaction. As is known, the local buckling of wide flange shapes is triggered by the flange instability. Conversely, the local buckling of narrow flange shapes generally is triggered by the web instability. Because of this property, the paper shows that at equal cross section area, the narrow flange profiles may exhibit higher ultimate loads with respect to the wide flange profiles in a broad range of column slenderness.


Journal of Composites for Construction | 2014

Identification of the Short-Term Full-Section Moduli of Pultruded FRP Profiles Using Bending Tests

Fabio Minghini; Nerio Tullini; Ferdinando Laudiero

Three-point and four-point bending tests are traditionally used to estimate the shear and flexural properties of pultruded fiber-reinforced plastic (PFRP) structural shapes. In the framework of Timoshenko’s beam model, the rigidities of beams can simply be obtained from linear combinations of the experimental deflections. However, several measurement uncertainties may affect the parameter identification. To analyze this drawback, a new test configuration was compared with the common three-point and four-point bending test configurations through an extensive experimental program concerning wide-flange commercial profiles. A parametric study was conducted by varying the span length, and, in the case of the four-point bending tests, the relative position of the applied loads. The influence of the load and deflection measurement errors was analyzed and proper uncertainty bands were provided for the computed rigidities.


Journal of Sound and Vibration | 2008

Dynamic identification of beam axial loads using one flexural mode shape

Nerio Tullini; Ferdinando Laudiero


International Journal for Numerical Methods in Engineering | 2007

Locking-free finite elements for shear deformable orthotropic thin-walled beams

Fabio Minghini; Nerio Tullini; Ferdinando Laudiero


Thin-walled Structures | 2008

Buckling analysis of FRP pultruded frames using locking-free finite elements

Fabio Minghini; Nerio Tullini; Ferdinando Laudiero


Journal of Sound and Vibration | 2013

Estimate of the axial force in slender beams with unknown boundary conditions using one flexural mode shape

Giovanni Rebecchi; Nerio Tullini; Ferdinando Laudiero


Engineering Structures | 2009

Elastic buckling analysis of pultruded FRP portal frames having semi-rigid connections

Fabio Minghini; Nerio Tullini; Ferdinando Laudiero


Thin-walled Structures | 2009

Vibration analysis with second-order effects of pultruded FRP frames using locking-free elements

Fabio Minghini; Nerio Tullini; Ferdinando Laudiero


Engineering Structures | 2010

Vibration analysis of pultruded FRP frames with semi-rigid connections

Fabio Minghini; Nerio Tullini; Ferdinando Laudiero


Mechanics Research Communications | 2012

Bending tests to estimate the axial force in tie-rods

Nerio Tullini; Giovanni Rebecchi; Ferdinando Laudiero

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