Search results for "Structural element"
showing 10 items of 12 documents
Analytical evaluation of steel–concrete composite trussed beam shear capacity
2015
A calculation method for the prediction of the shear resistance of precast composite beams, named Hybrid Steel Trussed-Concrete Beams (HSTCBs), is herein proposed. HSTCBs are constituted by a prefabricated steel truss embedded within a concrete matrix cast in situ so that, after curing, the two materials work together in the mechanical response of the composite structural element, the steel truss behaving as reinforcement of the beam. The proposed analytical model is developed on the basis of the results of a reference experimental campaign of three-point bending tests available in the literature, carried out on specimens of HSTCB designed in order to attain a shear failure. Furthermore, th…
Seismic prevention and rahabilitation of nonstructural elements. Criteria to define a post-seismic damage analysis procedure
2012
It reports very briefly the research work, developed by the author during her Doctorate course, about a post-seismic damage analysis procedure for nonstructural elements of framed structure building systems
Analysis of the accuracy of fiber-optic strain transducers installed by using composite smart patches
2015
The aim of this work is to investigate the accuracy of fiber-optic strain transducer related to the incomplete load transmission that can occur on composite smart patches used as base support for the installation of such transducer, commonly used for structural monitoring of concrete elements. In detail, since the dimensions of the transducer are generally very small compared to those of the structural element being monitored, attention is given not to the global reinforcement effect, which occurs when the transducer alters the entire strain field of the transversal section of the monitored element, but rather to the so-called local reinforcement effect, which is due to an incomplete load …
Selection of novel geopolymeric mortars for sustainable construction applications using fuzzy topsis approach
2020
Construction is recognized as one of the most polluting and energy consuming industries worldwide, especially in developing countries. Therefore, Research and Development (R&
Pumice concrete for structural wall panels
2003
Some properties of lightweight pumice stone concrete (LWPSC) are discussed, on account of a possible structural use of this material. Then the results of an experimental investigation are described, in order to show that pumice can really be considered an alternative to common artificial lightweight aggregates, taking into account the performance pointed out by loading tests carried out on structural systems made of LWPSC. Three different kinds of reinforced wall panels were made using LWPSC, lightweight expanded clay concrete and normal weight concrete; then their structural responses under horizontal cyclic and constant vertical forces were compared, above all with reference to lateral st…
Experimental dynamic analysis of elastic-plastic shear frames with secondary structures
2003
Various experimental models are developed to study the influence of lightweight secondary structures on the dynamic response of elastic and elastic-plastic shear frames. Small-scale two-story model frames, with an elastic single-degree-of-freedom secondary structure attached, are considered for sinusoidal and random in-plane support excitation. Both elastic and elastic-plastic responses are recorded by varying the material properties of the columns of a distinguished floor. Parametric studies are performed by varying the secondary structure's fundamental frequency and damping. Experimental results are compared with those obtained by computational simulations. Experimental and numerical resu…
Characteristics of mechanical metamaterials based on buckling elements
2017
Metamaterials are composed of structural elements and derive their properties mainly from the inner structure of the elements, rather than the properties of their constituent material. By designing an unstable structural element as the building block of a metamaterial, many interesting effective material properties can be obtained. The deformation and dissipation mechanisms of such a material built from unstable structural elements is studied in detail. To do so a combination of analytical, semi-analytical, and numerical models are applied to a single buckling element, a periodic cell, and finite size combinations of buckling elements including gradients in the properties of the building bl…
Criteri per l’analisi post-danno – Criteria for post-damage analysis.
2010
Gli elementi non-strutturali risultano assai più vulnerabili al sisma delle strutture, così come reso evidente dai terremoti che nell’ultimo decennio hanno colpito il nostro paese. Il danneggiamento di tali elementi, oltre a mettere a serio rischio la sicurezza degli edifici, e dunque l’incolumità, spesso rende diseconomici, disagevoli o addirittura impraticabili gli interventi di riparazione degli edifici. Ciò anche quando questi sono a struttura intelaiata e progettati e realizzati con criteri antisismici e le strutture non hanno subito danni di rilievo. D’altronde il comportamento sismico degli elementi non strutturali è stato lungamente trascurato e dall’analisi dello stato dell’arte in…
Seismic prevention and rehabilitation of nonstructural elements. Application experiences of nonstructural pre-seismic evaluation
2012
Topics concerning nonstructural seismic prevention and rehabilitation take their place in the main context of buildings safety in order to explore some aspects of performance of those technical elements. They have become very topical in Italy in the last decade since the repetition of seismic events has made vulnerability and its implications obvious not only in terms of safety risk. This paper reports briefly about author research experiences in this topic and more detail an experience as a component of research team, organizer and tutor in the activities of an international cooperation project between University of Palermo and University of California-Berkeley. After a short introduction …
Le attività all’interno del progetto: il workshop. Gestione del campus universitario di Palermo e dell’Edificio 14 Facoltà di Architettura - The acti…
2010
Verificata la mancanza di attenzione alla prevenzione e riabilitazione sismica degli elementi non strutturali nella ricerca scientifica e nella normativa tecnica italiana, è stato avviato un progetto di cooperazione internazionale tra l’Università di Palermo e l’Università di Berkeley dal titolo “Prevenzione e riabilitazione sismica nonstrutturale.Confronto fra due culture di prevenzione sismica al fine di redigere linee guida per un manuale d’uso degli edifici scolastici”, finanziato nell’ambito del programma CoRI 2005/2006 dell’Ateneo di Palermo. Tra le varie attività previste durante la permanenza del partner straniero a Palermo è stato organizzato un workshop, che ha visto coinvolto un …