Gabriele Milani

Gabriele Milani
Politecnico di Milano | Polimi · Department of Architecture, Built Environment and Construction Engineering

Ph.D.

About

596
Publications
75,802
Reads
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10,916
Citations
Additional affiliations
November 2019 - present
Politecnico di Milano
Position
  • Professor (Full)
October 2014 - November 2019
Politecnico di Milano
Position
  • Professor (Associate)
December 2008 - October 2014
Politecnico di Milano
Position
  • Professor (Assistant)

Publications

Publications (596)
Article
The liquefaction of soils is one of the most severe results of earthquakes. Indeed, post-liquefaction settlements are the main responsible for critical damages and collapse in shallow-founded buildings. The study of the behavior of buildings subjected to post-liquefaction settlements is rather complex since it requires to consider the interaction b...
Article
In this paper, we present a novel computational approach for the generalized three-dimensional upper bound limit analysis of curved rigid block structures. This approach allows to discretize structures with complex geometries into a finite number of curved blocks, while retaining an overall exact description of the structural geometry and improving...
Article
Arches are an important part of the masonry architectural heritage and also serve as infrastructure for bridges and culverts. The behavior testing and structural health monitoring of masonry arches require effective measurement methods. There have been a lot of testing methods applied regarding this subject, among which the vision-based non-destruc...
Article
In recent years, strengthening with Fiber Reinforced Polymers (FRPs) has emerged as an effective way for the structural upgrading of masonry elements. In such typology of external reinforcement, the bond quality is crucial for the increase of the load bearing capacity. The bond efficacy beyond the elastic limit can be studied analytically or numeri...
Article
Numerical modeling of curved masonry structures reinforced with TRM can be particularly demanding. Indeed, several failure typologies can be encountered when a masonry element is reinforced with this strengthening solution. In the case of arches and vaults, the curvature itself complicates furtherly a correct prediction. The paper wants to provide...
Article
Externally bonded composites have become an effective alternative for building strengthening in recent years, such as FRP (Fiber Reinforced Polymer) and FRCM (Fiber Reinforced Cementitious Matrix) can be utilized in this retrofitting strategy. For masonry structure, curved members are very common and tend to be the weakest parts of the system, mean...
Article
Curved masonry structures externally strengthened by Fiber Reinforced Polymer (FRP) systems exhibits failure mechanisms that emphasize a local bond behavior particularly influenced by the curved geometry of the substrate and the position of the strengthening (i.e. at the intrados or extrados). Indeed, together with tangential stresses, normal stres...
Article
An experimental investigation aimed to analyze the mechanical behaviour of Carbon Fiber Reinforced Composite (CFRP) anchor spikes inserted in a brick substrate is reported in this paper. As is well known, such devices can improve the structural performance of CFRP sheets externally bonded to masonry elements (as well as others substrate materials)....
Article
Full-text available
TRM (Textile Reinforced Mortar) and FRCM (Fiber Reinforced Cementitious Mortar) strengthening materials are highly heterogeneous composites involving domains that have dramatically different mechanical properties (i.e., inorganic matrix and fabric textile). Maximizing their exploitation ratio involves achieving a better bond between textile and ino...
Article
Seismic base isolation is considered effective to reduce the vulnerability of structures and it represents an optimal retrofitting solution in terms of reliability and effectiveness. Nowadays, one of the most promising devices is the Unbonded Fiber Reinforced Elastomeric Isolator (UFREI), which is considered a low-cost device, thanks to its lightwe...
Article
The safeguarding of the historical and cultural heritage is one of the main research topics that has been addressed in recent years. Particular attention was given to the development of structural health monitoring systems that allowed the real time acquisition of different physical quantities that are stored in a cloud and compared with the health...
Article
This work proposes a novel non-destructive, vision-based measurement strategy to identify and quantify mechanical deformations between rigid blocks. First the possible motions between two rigid blocks were identified and measured, under the application of a perpendicular, parallel and symmetrical 4x4 point grid around the masonry joint line. Repeat...
Article
Full-text available
The research aims to illustrate a vulnerability approach extended for the aggregate masonry buildings belonging to an urban area of the city of Latronico (Basilicata Region). The area was examined taking into account the predominant building typology according to the investigation line WP2 "Inventory of existing structural typology" of the Italian...
Article
Full-text available
This paper reports the results of different finite and discrete element simulations on a well-known benchmark of an unreinforced plane masonry structure. Namely, the case study concerns a five floor structural wall, located at the interior of a masonry building, situated in “via Martoglio” in the city of Catania (Italy). The numerical simulations a...
Article
Residual permanent displacements generally characterize the status of structures at the end of severe earthquake events because of large inelastic deformations demand. When the structure is founded on soils susceptible to liquefaction phenomenon, this status could particularly influence the subsequent damages due to the occurrence of liquefaction i...
Article
Full-text available
Heritage masonry structures are often modelled as dry-jointed structures. On the one hand, it may correspond to the reality where the initial mortar was weak, missing, or has disappeared through time because of erosion and lixiviation. On the other hand, this modelling approach reduces complexity to the studied problem, both from an experimental an...
Article
Full-text available
Masonry-Infilled Reinforced Concrete Frames are a very widespread structural typology all over the world for civil, strategic or productive uses. The damages due to these masonry panels can be life threatening to humans and can severely impact economic losses, as shown during past earthquakes. In fact, during a seismic event, most victims are cause...
Article
This work presents the proof-of-concept for a fast and cheap non-destructive monitoring system called “Behavior Mapping BP” for the analysis up to collapse of masonry. It belongs to a vision-based measurement similar to DIC but much more straightforward and inexpensive. It identifies and quantifies mechanical deformations between rigid blocks solel...
Article
This paper proposes specific ultimate shear strength expressions for partially-grouted reinforced masonry (PG-RM) shear walls with bed-joint reinforcement (BJR) and made with either multi-perforated clay bricks (MPCLBs) or hollow concrete blocks (HCBs). For each unit type, a set of constant coefficients of an arbitrary mathematical expression is op...
Article
Rubber is well known as the basic material for some structural devices, such as seaport fenders and seismic isolators. In practice, to seismically isolate a structure it is necessary to interpose between the foundation and the superstructure a rubber device that increases the period of the superstructure, a feature that allows the structure to be "...
Article
To investigate the influence of internal defects of semi-grouted sleeve connections on the seismic performance of precast monolithic columns, four specimens of precast monolithic concrete columns with semi-grouted sleeves connecting reinforcement bars were fabricated, including one specimen (PC-D0) with no internal defect and three specimens (PC-D1...
Chapter
An innovative procedure for the structural assessment of skew arches is here proposed. This peculiar configuration can be found in several masonry bridges that characterized the European road network. Arch bridges which present a grade of skewness have been already a topic of research in the last years as their peculiar geometric configuration may...
Chapter
In this work, we present a fast and reliable NURBS-based kinematic approach for the evaluation of the settlements-response of masonry arch bridges. This method is based on a discretization of the arch through NURBS rigid blocks. Here, the use of NURBS (Non-Uniform Rational B-Spline) approximating functions allows composing mesh through very few ele...
Article
Full-text available
Background Structural masonry framing has the potential to be an advantageous design technique for new constructions. The realization of this potential requires both design modernizations and accessible analysis methodologies. The focus and understanding of masonry frames have been directed towards the management and preservation of cultural herita...
Preprint
Full-text available
Many developing countries are located in earthquake-prone areas where buildings are often of poor design and not sufficiently protected against earthquakes. This causes damage or total collapse of buildings and heavy casualties whenever an earthquake occurs. Elastomeric isolators are special devices for the seismic isolation of structures. Typicall...
Article
In this paper, the collapse behavior of masonry arch bridges interacting with the backfill is investigated through an adaptive procedure based on the kinematic theorem of limit analysis and a NURBS (Non-Uniform Rational B-Spline) representation of the geometry. The initial model is subdivided into few macro-blocks considered rigid and with dissipat...
Preprint
Full-text available
Rubber is well known as the basic material for some structural devices, such as seaport fenders and seismic isolators. In practice, to seismically isolate a structure it is necessary to interpose between the foundation and the superstructure a rubber device that increases the period of the superstructure, a feature that allows the structure to be “...
Preprint
Full-text available
Seismic base isolation is considered effective to reduce the vulnerability of structures and it represents an optimal retrofitting solution in terms of reliability and effectiveness. Nowadays, one of the most promising devices is the Unbonded Fiber Reinforced Elastomeric Isolator (UFREI), which is considered a low cost device, thanks to its lightwe...
Article
Full-text available
This paper provides a comphrensive review of the critical aspects of nonlinear modeling for evaluating the seismic response of masonry structures, emphasizing the issues relevant to engineering practice. Currently, the specialized technical community shares the opinion that, for a performance-based approach, numerical models are the only tools suff...
Article
In this work, the study of a complex masonry umbrella vault located within Masegra Castle (Museum of Sondrio territory, Northern Italy) is presented. Built during the renewal of the castle in the 16th century, the umbrella vault of Masegra Castle is characterized by a total of eight sails, with four half-cross vaults added at the corners, supported...
Article
The aim of the paper is to extend and put at disposal to common users a reliable numerical procedure called MPM (Multi-Pier Macro) approach, already presented in-plane, for walls subjected to two way bending. This approach is developed starting from a Multi-Pier MP approach proposed by the authors in the past. The MP approach for the out-of-plane a...
Conference Paper
Full-text available
Rubber is the basic material for some structural devices, such as seaport fenders and seismic isolators. In order to seismically isolate a structure, it is possible to interpose between the foundation and the superstructure a rubber device that increases the natural period of the structure. This feature reduces the damaging effect on building due t...
Conference Paper
Full-text available
Elastomeric isolators are special devices for the seismic isolation of structures. They are typically made of alternating layers of steel or fiber-reinforced laminas and rubber pads. They are interposed between the ground and the foundation to increase the structure's natural period and reduce the damaging effect on the structure due to the earthqu...
Article
The current paper aims at analysing the effect of ground motion vertical component in the case of near-field excitations on the structural response of historical masonry buildings. In this perspective, the Banloc Castle in Romania has been considered as a reference case study. This historical masonry structure was damaged by the Banat-Voiteg earthq...
Article
In this work, a simple and effective Rigid Beam Model recently introduced for studying the dynamic behaviour of ancient freestanding stone columns is extended to the case of cantilever unreinforced masonry walls, considered along their thickness and subjected to out-of-plane loading. Both monolithic and multi-block walls were investigated. The prop...
Article
As an important historical building type for human beings, ancient masonry pagodas have key research significance. They are widely diffused in China, and they are tower-like masonry structures, usually massive and tall. This paper takes the Longhu pagoda as a case-study: it was built in 1342 CE, and it is the only masonry pagoda from the Yuan Dynas...
Article
A new procedure for a fast and comprehensive description of the collapse behavior of curved masonry structures is presented. The first step provides the identification of the exact collapse mechanism and the load-bearing capacity through adaptive NURBS limit analysis. This method is based on the discretization of the masonry vault through very few...
Conference Paper
An experimental and numerical analysis of the structural behaviour of a barrel tuff masonry vault strengthened by a Fiber Reinforced Cementitious Matrix (FRCM) reinforcement system it is proposed. The geometry and the materials of the vault are representative of some historical constructions in Apulia (Italy). The vault, under the action of the sel...
Article
Full-text available
A non-linear discrete homogenized strategy is used to reproduce out-of-plane two-way bending shake table tests on full-scale unreinforced masonry walls. The numerical strategy represents unreinforced masonry walls as an assemblage of rigid quadrilateral plates connected through non-linear interfaces represented. The material response laws for these...
Article
Full-text available
Physical and mechanical properties of timber components are the basis of developing the technical measures for the conservation and restoration of historical timber structural buildings. By means of integrating on-site investigation (such as a visual survey, moisture content test, micro-drilling resistance test, and material samples collection of h...
Article
The main purpose of this work is to evaluate and compare the remarkable influence of stereotomy on discrete methods adopted for the dynamic response of an ancient masonry structure. The historic building set as a case study is the Church of Santa Maria of Varano in Muccia, in the province of Macerata (Italy), exposed to the seismic sequence that se...
Article
In this paper, a two-step automated procedure based on adaptive limit and pushover analyses is developed for the seismic assessment of masonry structures. Inspired by an akin procedure previously developed by the authors for the out-of-plane behaviour, the procedure herein presented is extended to in-plane and combined in- and out-of-plane loading...
Article
Full-text available
Partially grouted reinforced masonry (PG-RM) shear walls have been widely used as structural elements in low- and medium rise earthquake-resistant buildings. Nonetheless, assessing its shear strength represents a complex task mainly because the partial grouting provides a non-constant cross section, which results in heterogeneous stress–strain pat...
Article
Fiber Reinforced Polymer (FRP) composites represent an effective retrofitting strategy for the rehabilitation of masonry and concrete structures. The importance of adhesion between support and strengthening material is crucial and great research effort has been aimed at understanding this phenomenon from an analytical perspective. According to inte...
Article
The vibration response of a full-scale polycentric near parabolic tuff barrel vault under differential settlements of the abutments are experimentally analyzed. During the experimental tests, the static and dynamic responses of the vault have been continuously monitored through a large number of sensors of different kinds placed in suitable points...
Article
The aim of this work is to present a simple and practical experimental technique for the estimation of the ultimate shear capacity of perforated in-plane loaded dry joint masonry panels. The test is carried out by using a tilting table; in-scale models of several different perforated walls are assembled and positioned on the tilting table. The tabl...
Article
The main aim of using the IoT paradigm is related to the possibility of a connectivity extension of several common SHM devices by means of Internet. The connected devices are thus able to transmit and process data, guaranteeing new scenarios in the design of acquisition systems in different fields of science and engineering. The innovations have le...
Presentation
This paper presents the numerical results obtained simulating two 4x4 mq masonry vaults (unreinforced and reinforced with glass-TRM) tested at the Universitat Politecnica de Valen-cia (Spain). The vaults were built using a traditional Catalan layered-construction technique and their structural behavior was analyzed when subjected to monotonic and c...
Conference Paper
Full-text available
Recent earthquakes have highlighted the high seismic vulnerability of the structures and the need of retrofitting interventions. Different seismic protection strategies and techniques can be used to increase the seismic capacity of existing masonry constructions. Common retrofit-ting techniques are generally based on a strengthening approach. Inste...
Conference Paper
Full-text available
Losses and damages induced by strong earthquakes are a dramatic reality worldwide. As a consequence, the implementation of innovative protection strategies for both existing and new constructions is of key societal importance. Elastomeric isolators are special devices for seismic isolation of structures. Typically, they are made of alternate layers...
Article
The aim of this paper is to present and put at disposal a reliable numerical procedure called MPM (Multi-Pier Macro) method that can be used by unexperienced practitioners by means of a software equipped only with non-linear truss elements with softening for the progressive failure analysis of large scale perforated masonry walls in-plane loaded. T...
Article
Full-text available
Elastomeric seismic isolation is a technique diffused in civil engineering to protect existing and new structures against earthquakes. It consists in introducing between the superstructure and the foundation several devices (called seismic isolators) having the property to carry vertical loads maintaining at the same time the shear modulus small, i...
Article
New materials and techniques continuously enrich the family of fiber reinforced polymer (FRP) systems to use for retrofit interventions of existing masonry constructions. Recently, the deep mounted flexible (DMF) technique, consisting of the execution of deep grooves in the masonry where FRP strips are placed by using flexible adhesives, have been...
Article
The use of fiber reinforced polymer (FRP) materials for strengthening interventions of existing constructions is a consolidated and widespread technique. In this context, although strengthening interventions generally involve curved masonry elements (arches, vaults, domes, etc.), only a few studies specifically concern the influence of the geometry...
Article
Full-text available
Reinforced Concrete (RC) buildings with masonry infills are a very common structural typology worldwide for civil, strategic, or productive use. Damage to infills may cause danger for human lives and strongly affects economic losses, as shown during past earthquakes. In the current literature, different approaches are available for modeling the in-...
Article
Engineering efficiency is paramount for the introduction of novel systems and formats of analysis. This work extends an accessible and efficient analysis platform by combining the kinematic equilibrium approach of limit analysis with the single degree of freedom nature of a hinge-controlled masonry arch to perform dynamic modelling of applied two-d...
Article
Partially grouted reinforced masonry (PG-RM) shear walls of hollow concrete blocks (HCB) have been an object of study during the last years. The non-constant cross-section of this type of structural element and the presence of reinforcement set a challenging scenario when assessing their lateral resistance. This scenario makes simple approaches (e....
Article
Full-text available
The present research paper properly focuses on the dynamics and failure mechanisms of the masonry “Apennine Church” of Santissimo Crocifisso in Pretare, municipality of Arquata del Tronto in the province of Ascoli Piceno (Marche region, Central Italy). Such a peculiar structural type traditionally characterizes the intense seismic area of Central I...
Article
Aim of the present paper is the proposal of a simple modeling approach for the numerical study of the bond behavior of Fiber Reinforced Cementitious Matrix (FRCM) reinforcements externally applied to curved substrates. The model consists of a schematization of the specimen strengthened by FRCM throughout spring elements representing both the substr...