Massimiliano De Iuliis

Polytechnic University of Turin | polito · DISEG - Department of Structural Engineering, Construction and Soil Mechanics

Il lavoro sviluppa un’analisi della domanda di danneggiamento sismico dell’evento de L’Aquila, a cui è attribuibile un periodo di ritorno di 475 anni, valutata il funzionale di Park & Ang e di fatica plastica. Considerando il sisma de L’Aquila rappresentativo della sismicità di molte zone appenniniche italiane e stante la limitata distanza tra la p...

A new approach to locating viscous dampers optimally is herein presented in order to control the torsional seismic response of asymmetric-plan buildings. Firstly, the effects of the plan-wise distribution of supplemental damping on torsionally dynamic behavior have been investigated by using modal analysis techniques in the state space representati...

A new robust design methodology to control the seismic performance of asymmetric structures equipped with a Single Tuned Mass Damper (STMD) is presented in this article. This design approach aims to control the seismic response of such systems by reducing both flexible-and stiff-edge maximum displacement. The dynamic problem has been investigated i...

This study presents a wide investigation to define the best seismic parameters characterising earthquake records aimed at modelling the dynamic response of several non-linear structural systems by means of a comparison between different Machine Learning (ML) algorithms. In detail, 400 synthetic excitations have been generated and examined with resp...

The use of machine learning techniques in the field of numerical optimization represents a promising strategy to approach dynamic problems characterized by strong non-linearities and a high number of parameters. Seismic vibration control is undoubtedly one of the fields that can benefit most from this approach, especially when aiming at studying th...

Still nowadays masonry structures represent most of the global built environment in seismic regions. Despite their diffusion and long age, their dynamic behavior under earthquake loads is still extremely hard to predict, since it depends on several site-dependent factors, such as local empirical expertise, that are difficult to generalize. Furtherm...

Passive structural control techniques are generally used as seismic rehabilitation and retrofit methodologies for existing structures. A poorly explored and exciting opportunity within structural seismic control research is represented by the possibility to design new structural forms and configurations, such as slender buildings, without compromis...

Passive structural control techniques are generally used as seismic rehabilitation and retrofit methodologies of existing structures. An exciting consequence of structural seismic control research is that it opens the mind to new possibilities in structural forms and configurations, such as slender buildings or bridges with longer spans, without co...

The study proposes a semiactive approach to control the dynamic response of a one-way plan-wise asymmetrical structural system by defining a set of closed-form analytical control algorithm to drive semi-active viscous devices in order to optimize different energy rates of the system to be protected, namely damping energy, elastic energy, kinetic en...

An integrated performance based design procedure for a simple single-degree-of-freedom structural system equipped with passive linear viscous devices is proposed. Lateral stiffness of the structure, axial stiffness of the brace and damping coefficient of the viscous damper are considered as design variables. Dynamic behavior of the series viscous d...

Static and dynamic effects on existing buildings due to deep excavations carried out for construction of underground structures in urban areas are discussed. The modifications in seismic vulnerability of the existing buildings located close to deep excavations edge are evaluated in order to compare the pre and post excavation static and dynamic be...

In this paper the issue of evaluating the effects produced by deep excavations on the built environment in urban areas and historical centres is discussed. Deep excavations unavoidably cause a field of soil deformations affecting the surrounding buildings. A second level probabilistic analysis on these effects is de-scribed for a case-study. In par...

The aim of the paper is to give a preliminary interpretation to the high damage levels (IX-X MCS) caused by the L’Aquila earthquake, even though its magnitude was moderate (ML=5.8) and the proper historical seismic classification of the stricken area. The study thus analyzes the inelastic seismic demand of a SDOF (Single Degree Of Freedom) system d...

This paper presents the most significant results obtained within a broad-ranging experimental program aiming to evaluate both the effectiveness and the robustness of a Base Isolation (BIS) and a Tuned Mass Damper (TMD) combined control strategy (BI & TMD). Following a brief description of the experimental model set-up and the adopted kinematic scal...

The study investigates on the inelastic response of equivalent Simple Degree Of Freedom systems (SDOF) to some L'Aquila earthquake accelerograms recorded in the epicentral area. According to recent statistical analysis, L'Aquila earthquake is considered as a seismic event having a return period of about 475 years. The aim of the paper is to give a...

In this paper a preliminary study concerning the possibility of managing data from an early warning network to drive a semi-active control system has been carried out. In particular, by evaluating the frequency content of the seismic input, by means of Fast Fourier Transform, at the accelerometric stations, it is possible to characterize the energy...

In questo articolo è discussa la problematica della valutazione degli effetti sugli edifici circostanti prodotti da scavi profondi in aree urbane con particolare riferimento ai centri storici. La realizzazione di scavi profondi comporta inevitabilmente l’insorgere di un campo di spostamenti in grado di interessare l’edificato circostante. Si descri...