Roberto Capozucca

• Marche Polytechnic University

The paper suggests a new hybrid approach named PSO-BOA-ANN for damage prediction, in particular, crack depth prediction in aluminum beam model using numerical and experimental vibration analysis as training data source. This study aims to investigate and analyze the accuracy of an improved ANN model using the improved PSO with BOA; where the PSO-BO...

This paper investigates the free vibration characteristics of a novel functionally graded (FG) porous microplate using isogeometric analysis (IGA). The study incorporates two types of FG microplates, FG-A and FG-B, with material properties varying continuously through thickness as defined by a new cosine function. Modified couple stress theory and...

Detecting and locating damage is a crucial endeavor within the field of structural integrity. While Artificial Neural Networks (ANNs) have shown promise in this regard, they have certain limitations that can be overcome through modifications in terms of their structural design and training meth-odologies. In this study, we propose a new optimizatio...

The Near-Surface Mounted (NSM) strengthening technique has emerged as a promising alternative to traditional strengthening methods in recent years. Over the past two decades, researchers have extensively studied its potential, advantages, and applications, as well as related parameters, aiming at optimization of construction systems. However, there...

This paper presents the effectiveness of a hybrid YUKI-RANDOM-FOREST, Particle Swarm Optimization-YUKI (PSOYUKI), and balancing composite motion optimization algorithm (BCMO) based on artificial neural networks (ANN) for the best prediction of patch design considering the maximum principal stress. The study compares the maximum principal stress in...

Detecting and locating damage is a crucial aspect of structural health monitoring. While Artificial Neural Networks (ANNs) have shown success in identifying damage in civil and mechanical structures, they come with certain limitations. However, enhancing the effectiveness of ANNs is achievable through adjustments in their architecture and training...

The ever-increasing demand for advanced composite materials in industries like aerospace and automotive has spurred the drive to address their inherent weaknesses. This pursuit is facilitated by the availability of numerical simulations and artificial intelligence, offering a cost-effective means to comprehensively study various phenomena without e...

In recent decades, swarm optimization methods have been employed to address various optimization problems in structural health monitoring (SHM). One of the widely recognized swarm-based algorithms, particle swarm optimization (PSO), has gained significant popularity and found extensive applications across diverse fields. However, it presents some l...

This paper intends to deepen the topic of damage detection based on non-destructive tests (NDT) for the assessment of the dynamic behavior of RC beams damaged and strengthened both with near-surface mounted (NSM) Carbon and GlassFRP rods. The NSM strengthening with fiber-reinforced polymer (FRP) rods of damaged reinforced concrete (RC) beams is a v...

The durability and simplicity of the programming of meta-heuristic algorithms make them important in the optimization field. This paper presents a novel application for double crack identification in carbon fibers reinforced polymer (CFRP) cantilever beams based on experimental and numerical analysis using enhanced optimization techniques. A new hy...

Vibration-based damage detection methods have become widely used because of their advantages over traditional methods. This paper presents a new approach to identify the crack depth in steel beam structures based on vibration analysis using the Finite Element Method (FEM) and Artificial Neural Network (ANN) combined with Butterfly Optimization Algo...

Metaheuristic algorithms have known vast development in recent years. And their applicability in engineering projects is constantly growing; however, their deferent exploration and exploitation techniques cause the engineering problems to favor some algorithms over others. This paper studies damage identification in steel plates using Frequency Res...

In this paper experimental results of investigation on reinforced concrete (RC) beams strengthened with the near surface method (NSM) are analyzed considering the response under bending tests on two beams. One of the RC beams was damaged by bending until the yield of reinforcement and successively strengthened with carbon fiber polymer (CFRP) rod,...

The near surface mounted (NSM) method of inserting fiber reinforced polymer (FRP) elements (rods or lamina) into notches has been shown to be a good way for restoring reinforced concrete (RC) elements. The knowledge about the use of Glass-FRP rod following the NSM to reinforce RC beams is limited. This paper deals with the analysis of static and dy...

In this paper, the initial and maximum load was studied using the Finite Element Modeling (FEM) analysis during impact testing (CVN) of pipeline X70 steel. The Gurson-Tvergaard-Needleman (GTN) constitutive model has been used to simulate the growth of voids during deformation of pipeline steel at different temperatures. FEM simulations results used...

The Gurson–Tvergaard–Needleman damage model (GTN) describes the three stages of ductile tearing of steel: nucleation, growth and coalescence of micro-voids. This work is divided into two main parts. In the first part, based on the inverse analysis and the comparison between the experimental and numerical data, the parameters of the GTN damage model...

The Near-Surface Mounted (NSM) reinforcement method has been shown to be one of the most important technique for the rehabilitation of damaged concrete structures or ones that are not adequate to support expected loads. However, despite decades of scientific research centered on the optimization of construction details, on models for bond behaviour...

The past years were marked by an increase in the use of wood waste in civil and mechanical constructions. Date palm waste remains also one of the most solicited renewable and recyclable natural resources in the composition of composite materials. In Algeria, a great amount of this type of plant wastes accumulates every year. In order to make use of...

In recent years, the strengthening of masonry walls with external bonded (EB) fiber reinforced polymers (FRPs) has been increased to give a tensile capacity to masonry that it is normally weak to tensile stress. Many aspects of this strengthening method are not yet thoroughly known: in particular, the debonding mechanism of FRP strips needs to be a...

Near surface mounted (NSM) technique of strengthening with FRP rods inserted in grooves on the concrete cover of damaged RC beams has been improved in recent years. The aim of this paper is the examination of the static and dynamic behaviour of undamaged and damaged reinforced concrete (RC) beams with free-free ends. RC beams strengthened with NSM...

We discuss the research that is being carried out at the Department of Civil and Building Engineering and Architecture (Dipartimento di Ingegneria Civile, Edile e Architettura, DICEA) of the Università Politecnica delle Marche (UNIVPM). Over the years the DICEA has steadily focused its attention on resilient environments and buildings, making a gro...

In this study, free vibration analysis of Timoshenko beams is presented in order to determine the error in natural frequencies of a beam using experimental and numerical analysis based on Isogeometric analysis (IGA). Numerical modeling based on IGA has been updated using Cuckoo search algorithm according to the results found by experiments. NURBS o...

This paper presents a new methodology for damage identification and quantification in two- and three-dimensional structures. The application of the proposed methodology is investigated numerically using Finite Element Method (FEM) and Matlab program. We propose a Modified Cornwell Indicator (MCI) that performs more efficient in damage detection tha...

Historic masonry walls have demonstrated high vulnerability and low shear capacity when exposed to seismic actions. The behaviour of historic un-reinforced masonry (HURM) walls under combined compression and shear loading plays a fundamental role in the seismic assessment of masonry buildings. During earthquakes, HURM walls are subjected to shear l...

Introduction This paper compares theoretical results with the experimental investigation developed in the laboratory at the University of Edinburgh on a five-storey masonry building model in scale 1:3. In the case of masonry structures, unfortunately, the control of the theoretical results obtained by FE analysis is often hard although it is fundam...

This paper presents a new fast approach for crack identification using vibration analysis based on model reduction using proper orthogonal decomposition method with radial basis function (POD-RBF). The method is formulated as an inverse problem for detecting the position, length and depth of crack in Carbon Fibre Reinforced Polymer (CFRP) composite...

Among the methods of monitoring of integrity, vibration analysis is more convenient as non-destructive testing (NDT) method. Many aspects regarding the vibration monitoring of the structural integrity of damaged RC elements have not been completely analysed in literature. The correlation between the development of the crack pattern on concrete surf...

The strengthening of damaged reinforced concrete (RC) beams through near surface mounted (NSM) fiber reinforced polymers (FRPs) has been shown to be a suitable method in practice. Availability of this technique is based on maintaining the adhesion between FRP rods and the concrete surface of grooves, both undamaged and damaged by cracking of beams....

The near-surface mounted (NSM) technique using Fiber Reinforced Polymer (FRP) rods inserted into grooves has been shown to be a suitable method in the strengthening of reinforced concrete (RC) beams. Availability of this strengthening is due to bond between concrete–resin-FRP rod and to absence of damage of FRP rods. In this paper, the detection of...

External bonding strengthening (EBS) of masonry walls with fibre reinforced polymers (FRPs) has become a common technique to improve the mechanical capacity of masonry. In particular, glass fibre reinforced polymer (GFRP) strips are usually adopted as EBS to improve shear capacity under in-plane loading of historic masonry walls in monumental build...

Among the methods available for repairing or strengthening reinforced concrete (RC) beams, the Near Surface Mounted (NSM) technique has been shown to be a suitable method in many cases. Nevertheless, the effect of tensile concrete cracking on the bond mechanisms of Fiber Reinforced Polymer (FRP) rods in rod-resin interfaces and/or in resin concrete...

Inserting FRP rods into grooves using the NSM technique has been demonstrated to be a suitable method for repairing or strengthening RC beams. Recently, the availability of NSM GFRP rods has been highlighted notwithstanding low elasticity and shear modulus. This paper elaborates considerations on NSM GFRP rod strengthening on the basis of the resul...

The aim of this paper is the analysis of vibration of undamaged and damaged Carbon Fibre Reinforced Polymer (CFRP) beam elements. Experimental free vibration of CFRP cantilever beam elements were investigated by dynamic tests; damage of CFRP specimens were locally due to double notches close to the fixed end with different reduction of section and...

The use of the near surface mounted (NSM) fiber reinforced polymer (FRP) technique for retrofitting RC beams is a mainstream. Nevertheless, the bond mechanisms of FRP rods between rods and adhesive resin and/or rod–resin with concrete surfaces are not known completely.This paper investigates the experimental bond-slip effects of circular and rectan...

Occurrence of cracking damage in a structural, reinforced, concrete element leads to changes in its dynamic response. Nevertheless, the typical non-linear behavior of prestressed reinforced concrete (PRC) and reinforced concrete (RC) beams is characterized by cracking, due to the low tensile strength of concrete. It is necessary to take adequate ac...

The use of Fiber Reinforced Polymers (FRPs) for strengthening damaged RC beams has become common practice over recent years. Two methods adopted for repairing or strengthening such beams are FRP plates/sheets glued onto their concrete surface and FRP rods or strips inserted into grooves.This paper investigates experimental vibration monitoring of s...

Externally bonded fiber reinforced polymers (FRPs) used as strengthening for shear historic masonry walls increase tensile capacity so as to support combined compression and high shear forces released during earthquakes. The local and global capacity of FRP strengthened shear walls depends on delamination. This paper deals with the anchorage streng...

External bonding of Fiber Reinforced Polymers (FRPs) has become a popular technique for strengthening historic masonry wall buildings in seismic area. Although FRPs seem to improve response of historic masonry walls under in-plane shear loading, further investigations must specify a number of aspects for both researchers and practitioners. This pap...

This year´s CIB Commission meeting of the working group “W023–Wall Structures” took place in Berlin, Germany October 10–11, 2011. The participants were welcomed by the commission coordinator Silvino Pompeu Santos and the host of the meeting Professor Wolfram Jaeger in cooperation with the Bundesvereinigung der Prüfingenieure für Bautechnik e.V. (BV...

The present paper reports on damaged prestressed reinforced concrete (PRC) beams and reinforced concrete (RC) beams experimentally investigated through dynamic testing in order to verify damage degree due to reinforcement corrosion or cracking correlated to loading. The experimental program foresaw that PRC beams were subjected to artificial reinfo...

The preservation of the architectural heritage presents one of the important challenges in civil engineering due to the complexity of the geometry of the structures, the variability of the materials used and the loading history of the buildings. This objective increases for existing constructions in the seismic area. External bonding of fiber or, m...

Behaviour of RC beams damaged and strengthened with near surface mounted (NSM) carbon fibre reinforced polymer (CFRP) rods has been experimentally investigated. In this paper, results of static bending and dynamic tests are shown and discussed. Experimental program foresaw that RC beams were damaged by increasing loads to produce different degrees...

In this paper, the behaviour of pre-stressed RC beams with compressive concrete subjected to damage due to reinforcement corrosion has been experimentally investigated. The experimental static and dynamic analysis is described. The results of static bending tests show that the corrosion leads to an increase of curvature for prestressed RC section,...

In recent years the use of composite materials as reinforcement in concrete beams has increased whenever durability is the main controlling parameter. Many studies have been performed on the behaviour of concrete beams but few have analysed the structural behaviour of plane elements like slabs or grids. The paper analyses the experimental flexural...

Historical brickwork masonry walls are subjected to biaxial stress state due to vertical loads combined with shear forces induced in the plane of masonry element during earthquake. Shear failure is one of the characteristic modes of failure of many un-reinforced masonry (URM) buildings. In order to investigate the behaviour of historic brick masonr...

The aim of this work is to describe the response under lateral loading of a masonry building prototype analysed by means of FE linear and nonlinear modelling, comparing the theoretical results with experimental data. A technique for simulating crack development in masonry walls was employed and shear assessments of cross walls were finally carried...

In this paper, the influence of damage due to corrosion of reinforcement in the compressive zone of RC beams is analysed. In the damaged RC beams, the corrosion of reinforcement, as a consequence of an electrochemical process, produces an increase of diameter of bars due to rust products that gives rise to a microcracking of the concrete around the...

The aim of this paper is to analyse the static and dynamic behaviour of RC beams strengthened by CFRP-sheets after damage by cracking. An experimental program has been developed considering RC beam models with or without strengthening by CFRP-sheets on the tensile zone subjected both to static and dynamic tests. The tests on the RC beam models were...

The aim of this paper is the analysis by dynamic identification of reinforced concrete (RC) beams subjected to corrosion of the reinforcement. On the basis of previous experimental research on the bending behavior of RC beams affected by corrosion of the reinforcement, the authors acknowledge that the main effect of corrosion is the decrease of str...

Composite beams require an adequate connection system. This paper describes composite concrete-timber beams with a bonded connection system employing prestressed steel connectors. The connection is obtained by means of threaded steel bars inserted into the holes of timber and prestressed by a normal force. The connectors are able to transmit bond s...

The products of steel corrosion create volumetric expansion in the steel bars that damages the concrete. The effects on the rc elements are described in this paper. The damage of concrete by cracking which produces a variation of the tension distribution over the entire section and causes a variation of the bending rigidity and a reduction of the c...

Hollow bricks are very commonly used in modern masonry as units of the loadbearing panels. The authors experimentally analysed brickwork masonry built by hollow bricks considering prisms, wallets and shear panel model in scale 1 to 2 subjected to bending and shear. In particular, in this paper the applicability of the homogenisation technique is va...