Search results for " Analytical"

A novel identification procedure from ambient vibration data for buildings of the cultural heritage

Ambient modal identification, also known as Operational Modal Analysis (OMA), aims to identify the modal properties of a structure based on vibration data collected when the structure is under its operating conditions, i.e., no initial excitation or known artificial excitation. This procedure for testing and/or monitoring historic buildings, is particularly attractive for civil engineers concerned with the safety of complex historic structures. However, since the external force is not recorded, the identification methods have to be more sophisticated and based on stochastic mechanics. In this context, this contribution will introduce an innovative ambient identification method based on appl…

Strength and ductility of confined concrete columns under axial load and biaxial bending

2012

The behaviour of prismatic reinforced concrete columns under increasing eccentric compression load was experimentally investigated and analytically modelled. Columns with distributed longitudinal reinforcement and closely spaced transverse reinforcement were tested up to failure, considering different values and directions of eccentricity. Preliminary tests were carried out under concentric compression in order to validate the choice of the stress-strain laws adopted for the confined concrete and the longitudinal steel bars in compression. In the paper, closed form expressions able to approximate the experimental results in the case of uniaxial bending are presented. Finally, a fibre numeri…

Indagine sperimentale su nodi di tralicci in acciaio di travi reticolari miste

2009

Results of experimental tests on welded joints of steel truss of encased composite steel-concrete beams are presented. The welding of the inclined web bars to top bars, both of steel type B450C, and to bottom steel plate, the latter made of S355 steel type, are tested. Two analytical expressions for prediction of welding strength are derived: the one based on a resistance criterion and the other based on a limit domain of the welding section. Guidelines for choosing the effective dimensions of the fillet weld, necessary to determine the strength, are provided. A high precision digital scanner is used to validate the suggested guidelines to determine the geometrical characteristics of the fi…

ANALISI TEORICO-SPERIMENTALE DEL COMPORTAMENTO A TAGLIO DI TRAVI PREFABBRICATE RETICOLARI MISTE

2014

An experimental campaign of three-point bending tests on specimens of Hybrid Steel Trussed Concrete Beams (HSTCBs) is presented. The scope of the experiments is the evaluation of the shear strength in the structural typology object of study. Two series of specimens are tested, subjected to positive and negative bending moment, respectively, with the aim to reproduce, in the first case, the condition in the midspan of a beam belonging to a framed structure and, in the second case, the behavior of the beam next to the column where the sign of the bending moment is reversed. The obtained experimental results are interpreted by means of an analytical model for the prediction of the shear resist…

Comparative analysis of shear resisting models for hybrid steel trussed concrete beams

2018

The hybrid steel trussed concrete beams represent a structural solution widely adopted in the industrial constructions thanks to the numerous advantages due to their use, such as economic convenience, high performances and constructional speed de-riving from the partial prefabrication process and from the self load-carrying capacity of the beam in the first operative phase, prior to the in-site casting of concrete. The hybrid steel trussed concrete beams examined in the present study are constituted by two prin-cipal components, i.e. a steel joist with inclined rebars, realized in industry, which is welded to a smooth steel plate and then embed-ded within the concrete material cast in situ.…

An Innovative Statistical Tool for Automatic OWL-ERD Alignment

2016

Aligning two representations of the same domain with different expressiveness is a crucial topic in nowadays semantic web and big data research. OWL ontologies and Entity Relation Diagrams are the most widespread representations whose alignment allows for semantic data access via ontology interface, and ontology storing techniques. The term ""alignment" encompasses three different processes: OWL-to-ERD and ERD-to-OWL transformation, and OWL-ERD mapping. In this paper an innovative statistical tool is presented to accomplish all the three aspects of the alignment. The main idea relies on the use of a HMM to estimate the most likely ERD sentence that is stated in a suitable grammar, and corre…

Hart’s Blind Spot. Il tassello mancante in Th,e Concept of Law

2012

At the beginning of The Concept of Law Hart suggests a mistaken assimilation between conduct that is ‘non-optional’ and conduct that is ‘obligatory’ (i.e,. conduct that is either coerced or subject to an obligation). This suggested assimilation vitiates the argument of the whole book, leading Hart to neglect the different ways in which the law typically tracks, corroborates or constitutes power relations. It is true that, famously, attention is paid, in The Concept of Law, to normative, legal powers. Brute social power, and law’s relation to it—the role of law as a cog in the workings of social powers—, however, are largely overlooked. This is. in a way, Hart’s blind spot. I list some of th…

Legal Science: Analytical Conceptions

2022

This entry is devoted to a survey of the main analytical conceptions of legal science. The focus will be in particular on (1) Alf Ross’s legal realism and his neo-positivistic approach to legal science; (2) Norberto Bobbio and the Italian analytical legal philosophical school, which firmly tie legal science to language analysis; (3) Herbert Hart and the analytical philosophy of ordinary language, and, eventually, (4) Ronald Dworkin and the interpretative turn.

Il progetto dell'Enlightenment Rule of Law e l'evoluzione del diritto

2019

The article examines Celano's conception of the Rule of Law in order to underline its limits. It identifies the main reason for its limits in the use of the methodology of analytical jurisprudence, that is not able to look at the law as it is: a differentiated phenomenon. The article proposes to look at contemporary law and to rethink the idea of the rule of law accordingly.

Within the symbolic world of the prehistoric hunters: A GIS-based and 3D model analysis of sites with complexes of linear incisions in western Sicily

2021

Abstract The prehistoric peopling of Sicily has left scattered traces of symbolic activities through well-known rock art expressions in caves and rock shelters located all around the island (among the most significant, the sites of Addaura, Racchio and Genovese). A peculiar phenomenon is the incision of linear signs, often grouped on the same rocky walls, hidden in fissures or placed at the entrance of the underground chambers of caves. In this report, we investigate a sample of these graphic expressions from a spatial and technical point of view. A GIS-based approach presents the territorial pattern providing insight, on a macroscale, into the intentional positioning of the sign complexes.…