"Stability of Structures", in Memory of Prof. Marcello Pignataro

A special issue of CivilEng (ISSN 2673-4109). This special issue belongs to the section "Structural and Earthquake Engineering".

Deadline for manuscript submissions: 20 December 2024 | Viewed by 2671

Special Issue Editors


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Guest Editor
Department of Structural and Geotechnical Engineering, University “La Sapienza”, Rome, Italy
Interests: continuum mechanics; structural stability; beam theory; damage modeling and identification; history of mechanics
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Guest Editor
Department of Civil, Construction-Architectural and Environmental Engineering, University of L’Aquila, Piazzale Ernesto Pontieri, Monteluco di Roio, 67100 L’Aquila, Italy
Interests: continuum and structural mechanics; linear and nonlinear dynamics; stability and bifurcation of dynamical systems; buckling and postbuckling of elastic structures; localization phenomena; aeroelasticity; perturbation methods; computational mechanics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

You are kindly invited to contribute to the Special Issue dedicated to the memory of the late professor Marcello Pignataro, who passed away on August 24, 2022. Professor Pignataro was one of the first of his time in Italy to attend a master in the United States, becoming close with the late professor W. T. Koiter, the father of the contemporary theory of elastic stability, of whom he considered himself a pupil. In his lifelong career at the university of Rome “La Sapienza”, professor Pignataro was the founder of the local school on stability investigations, inspiring the research interests and curiosity of his younger colleagues, who followed his path —among them, we may note Raffaele Casciaro, Nicola Rizzi, Angelo Luongo, and Giuseppe Ruta. Thus, this Special Issue is devoted to all researchers who wish to propose their studies in the fields of static and dynamic structural stability.

Welcome papers will be those that explore areas falling within the scope of CivilEng, namely: (i) static stability of civil structures, such as tall buildings, towers, reservoirs, and so on; (ii) static stability of structural elements under non-trivial loadings or in the presence of damage; (iii) dynamic stability of structures, for instance under nonconservative actions, e.g., in conjunction with fluid interaction or parametric excitation; (iv) multi-stable structural elements and their applications in civil engineering; (v) and bifurcation phenomena in innovative materials. Those are just instances of the possible topics that can explored, but of course any contribution in the field of stability will also be considered.

Dr. Giuseppe Ruta
Prof. Dr. Angelo Luongo
Guest Editors

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Keywords

  • structural stability
  • bifurcation theory
  • static buckling
  • dynamic bifurcation
  • fluid–structure interaction
  • parametric excitation
  • follower forces
  • computational methods
  • experimental methods

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Published Papers (2 papers)

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Research

20 pages, 4078 KiB  
Article
The Second Variation of the Potential Energy and the Theory of Elastic Stability
by Mario Como
CivilEng 2024, 5(3), 609-628; https://doi.org/10.3390/civileng5030033 - 31 Jul 2024
Viewed by 614
Abstract
We remember and comment on the research scenario of the theory of elastic stability that accompanied all the course of studies, carried out with enthusiasm and passion, of Prof. Marcello Pignataro, who we still miss and to whom our affectionate memory goes. Marcello [...] Read more.
We remember and comment on the research scenario of the theory of elastic stability that accompanied all the course of studies, carried out with enthusiasm and passion, of Prof. Marcello Pignataro, who we still miss and to whom our affectionate memory goes. Marcello was in continuous contact with Professor Koiter in Delft, to study, with a new approach, the many and still open problems of the nonlinear theory of elastic stability. In those times, the entire approach used in the study of the equilibrium stability of elastic structures was in question and its basis seemed to need to be reformulated. The central theme was the definition of the stability criterion of the second variation of the potential energy and how it being definite positive could effectively imply stability. Full article
(This article belongs to the Special Issue "Stability of Structures", in Memory of Prof. Marcello Pignataro)
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15 pages, 11625 KiB  
Article
Non-Linear Dynamics of Simple Elastic Systems Undergoing Friction-Ruled Stick–Slip Motions
by Riccardo Barsotti, Stefano Bennati and Giovanni Migliaccio
CivilEng 2024, 5(2), 420-434; https://doi.org/10.3390/civileng5020021 - 3 May 2024
Cited by 1 | Viewed by 1277
Abstract
The stick–slip phenomenon is a jerking motion that can occur while two objects slide over each other with friction. There are several situations in which this phenomenon can be observed: between the slabs of the friction dampers used to mitigate vibrations in buildings, [...] Read more.
The stick–slip phenomenon is a jerking motion that can occur while two objects slide over each other with friction. There are several situations in which this phenomenon can be observed: between the slabs of the friction dampers used to mitigate vibrations in buildings, as well as between the components of the base isolation systems used for seismic protection. The systems of this kind are usually designed to work in a smooth and flawless manner, but under particular conditions undesired jerking motions may develop, yielding complex dynamic behavior even when only a few degrees of freedom are involved. A simplified approach to the problems of this kind leads to the mechanical model of a rigid block connected elastically to a rigid support and at the same time with friction to a second rigid support, both the supports having a prescribed motion. Despite the apparent simplicity of this model, it is very useful for studying important features of the non-linear dynamics of many physical systems. In this work, after a suitable formulation of the problem, the equations of motion are solved analytically in the sticking and sliding phases, and the influence of the main parameters of the system on its dynamics and limit cycles is investigated and discussed. Full article
(This article belongs to the Special Issue "Stability of Structures", in Memory of Prof. Marcello Pignataro)
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