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October 2017 - July 2019
January 2017 - September 2017
Publications
Publications (60)
The aim of this study is to compare the seismic response of reinforced concrete (RC) symmetric buildings, with a varied number of stories, strengthening with three types of passive energy dissipation systems, as tuned mass dampers, viscous dampers, and friction dampers. The paper presents an overview of design optimization with the object of minimi...
The present work concerns the dynamic and vibroacoustic response of timber floor panels as well as the study of the effect of material nonlinearities and damping. Each panel is composed of glued laminated beams and wood constituting the floor. The dimensions of the panels are defined to ensure appropriate implementation and transport conditions. Fo...
The aim of this work is to optimize the acoustic insulation performance of a wooden floor with joists, on which a layer of porous material is installed to reduce its sound transmission, mainly in the low‐frequency range. The study focuses on identifying the geometric parameters and materials with the greatest influence on vibroacoustic response thr...
This paper uses a hyper-reduced order model (HROM) to perform bidirectional Hardware-in-the-Loop (HiL) real-time hybrid tests on a steel column virtually connected to a two-story reinforced concrete (RC) substructure under earthquake conditions. Two hydraulic dynamic actuators apply the horizontal displacements at the top of the specimen. Nonlinear...
In this study, the effects of an energy dissipation device in a reinforced concrete building are presented. The damper that is used in this study is part of the passive energy dissipation systems and absorbs the seismic energy through yielding in bending and frictional forces that occur in the metallic elements of the damper. The existence of this...
This paper combines a hyper‐reduction procedure, the proper orthogonal decomposition unassembled discrete empirical interpolation method, with a non‐iterative α‐operator splitting (α‐OS) time‐integration scheme for accelerating parametric analyses on damageable civil engineering structures subjected to earthquakes. Applications on a two‐story reinf...
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Abstract
This research aims to investigate the impact of incorporating porous materials on reducing noise and vibration in wooden floor panels, and to analyze the vibroacoustic performance of the assembled panel under different types of excitation and boundary conditions, particularly in the lower frequency range. T...
On 6th February 2023, a strong earthquake of magnitude Mw7.8 struck the central and southern parts of Turkey and the northern and western parts of Syria. The epicentre of the earthquake was located approximately 35 km west–northwest of the town Gaziantep, followed by more than 570 strong aftershocks. A strong aftershock measuring Mw 6.7 occurred ab...
On 6th February 2023, a strong earthquake of magnitude Mw7.8 struck the central and southern parts of Turkey and the northern and western parts of Syria. The epicentre of the earthquake was located approximately 35 km west-northwest of the town Gaziantep, followed by more than 570 strong aftershocks. A strong aftershock measuring Mw 6.7 occurred ab...
The aim of this paper is to present the effects of lead rubber bearings (LRB) or viscous dampers (VD) in irregular in plan reinforced concrete buildings. The buildings (a three-story building, an eight-story building, and a twenty-story building) had been studied under earthquake recorded accelerograms, three of them are real and the other four are...
This paper uses Hyper-Reduced Order Models (HROMs) to accelerate parametric and sensitivity analyses on reinforced concrete structures subjected to earthquakes. The number of Degrees Of Freedom (DOFs) is reduced using a Proper Orthogonal Decomposition (POD) reduced basis. The nonlinear terms of the matrix system are approximated using an Unassemble...
An extensive investigation of the international literature is carried out regarding the passive energy dissipation systems and more specifically the dampers that can be positioned in steel braces to increase the absorption of seismic energy and to protect them from buckling, such as Friction (FDs), Metallic (MDs), and Viscous dampers (VDs). This re...
In the present work attention is focused on the friction-yielding damper CAR1 (first prototype of Control-Absorb-Retain damper), which belongs to passive energy dissipation systems. This damper consists of very simple materials; it does not need to be accomplished in heavy industry so enables its use in both developing and undeveloped countries. Th...
I am pleased to invite you to submit a contribution to the Special Issue “Seismic Analysis of Multistoried Building”of the journal “Buildings”.
Deadline for manuscript submissions: 10 June 2023.
Nowdays structures are higher, lighter, and some of them have irregular configuration both in elevation and plan. These buildings need careful design as...
The aim of this paper is to present the effects of lead rubber bearings (LRB) or viscous dampers (VD) in irregular in plan reinforced concrete buildings. The buildings (a three-story building, an eight-story building, and a twenty-story building) had been studied under earthquake recorded accelerograms, three of them are real and the other four are...
Earthquake engineering hybrid testing requires the use of efficient nonlinear Hyper Reduced Order Models (HROMs) that can be run in real time. To tackle this problem, a Proper Orthogonal Decomposition (POD) Unassembled Discrete Empirical Interpolation Method (UDEIM) is here associated to a non-iterative α-Operator Splitting (OS) time integration sc...
Floor vibration and structure-borne sound in residential buildings could be induced by several sources such as people walking indoors, machines vibration, and speakers. This highlights the need to improve the design of multi-story timber buildings in terms of vibration level and the need of further investigation on this field. The vibration paramet...
"Vibroacoustic modeling of timber floor panels using finite element methods"
5th International Conference on Material Strength and Applied Mechanics (MSAM 2022) at Qingdao, Shandong, China
The design of reinforced concrete structures follows prescriptions of codes and standards (e.g., ACI and Eurocode). The strut-and-tie method is the only approach detailed in standards for the design of reinforcement of massive structures. Stut-and-tie methods are currently showing a strong interest and several techniques are based on automatic stra...
In this paper a comparison of the seismic performance of three symmetric in plan reinforced concrete (RC) buildings strengthened with viscous or friction dampers are presented. An overview of the optimal design of each type of dampers is described. Three buildings (a four-storey building, a nine-storey building, and a sixteen-storey building) were...
In this paper, a Finite Element Model (FEM) of Reinforced Concrete (RC) beam-to-column joint is investigated. The validation of the FE model is base to the experimental results, which are part of an experimental campaign lead up at the University of Salerno. The FEM study is developed and analyzed using Abaqus software. The analytical investigation...
This study presents an overview of estimation methods to predict the actual project duration of Greek highway projects. Emphasis is given to the selection of the appropriate parameters that correlate with the actual project duration and to compare the performances of the main two methods, the linear regression (LR) with the neural network models (N...
This experimental study investigates the response of six innovative moment connections between composite floor panels and glulam columns. Each composite panel consists of five glulam beams and ultra-high performance fibre reinforced concrete cladding. The dimensions of the individual elements of the floor panels and the columns are fixed. The prese...
The aim of this study is to create a nonlinear FE model able to predict the mechanical behavior of RC wall/slab connections strengthened by using Carbon Fiber Reinforced Polymers. The experimental mechanical behavior of 4 full scale RC wall/slab connections with a reference join and 3 strengthened by FRP are investigated from members of our researc...
In this paper, a Finite Element Model (FEM) of Reinforced Concrete (RC) beam-to-column joint is investigated. The validation of the FE model is base to the experimental results, which are part of an
experimental campaign lead up at the University of Salerno. The FEM study is developed and analyzed using Abaqus software. The analytical investigatio...
The aim of this study is to highlight and evaluate parameters that correlate with the actual project duration and compare performance of linear regression with neural network models to predict a reliable final duration for highway construction projects based on data available at the bidding stage. The thirty-seven highway projects that are examined...
This study experimentally investigates the mechanical response of four types of hybrid connections between glulam timber-concrete panels and glulam timber columns under monotonic and cycling loading. The hybrid panels are composed of glued laminated wood beams and/or concrete constituting the floor and wooden beams constituting the supporting frame...
Purpose
This paper aims to examine selected similar Greek highway projects to create artificial neural network-based models to predict their actual construction duration based on data available at the bidding stage.
Design/methodology/approach
Relevant literature review is presented that highlights similar research approaches. Thirty-seven highway...
![Figure 2. Details of the experimental setup. [1].](profile/Magdalini-D-Titirla/publication/335690970/figure/fig1/AS:801123787079680@1568014203005/Details-of-the-experimental-setup-1_Q320.jpg)
The safety of constructions is one of the major priorities of engineering globally. Many efforts have been made to strengthen and repair RC structures using Fiber Reinforced Polymers (FRP). A lot of studies have been done on Columns and beam or beam/columns join to enhance the efficiency of FRP for seismic strengthening. But few research concern th...
This study experimentally investigates the mechanical response of seval new types of hybrid connections between glulam timber-concrete panels and glulam timber columns. Each panel is composed of glued laminated wood beams and/or concrete constituting the floor and wooden beams constituting the supporting framework for the façade elements. The dimen...
Cet article présente une étude expérimentale de connexions innovantes entre des planchers hybrides et des colonnes en bois. Chaque panneau est composé de poutres en bois lamellé collé et/ou de béton constituant les planchers et de poutres en bois constituant l’ossature porteuse des éléments de façade. Cinq spécimens, impliquant cinq types de différ...
The aim of the present paper is the experimental investigation of five different types of joints between concrete-timber hybrid panels and timber columns. Each panel consists of Glulam timber and/or Concrete members with timber and concrete beams and concrete cladding. The first connection type incorporates a dowel-type column that jointed to the b...
Cet article présente une étude expérimentale de connexions innovantes entre des planchers hybrides et des colonnes en bois. Chaque panneau est composé de poutres en bois lamellé collé et/ou de béton constituant les planchers et de poutres en bois constituant l'ossature porteuse des éléments de façade. Cinq spécimens, impliquant cinq types de différ...
In recent years, considerable attention has been paid to research and development methods able to assess the seismic energy propagation on the territory. The seismic energy propagation is strongly related to the complexity of the source and it is affected by the attenuation and the scattering effects along the path. Thus, the effect of the earthqua...
The present study focuses on the experimental investigation of an innovative passive mitigation steel device, mentioned as CAR1. It consists of three distinguished parts; the external cylindrical ring, the internal prismatic holder and several superimposed blades that are responsible for the transfer of forces between the aforementioned 2 parts. CA...
The present work illustrates results concerned with experimental tests on physical (reducedscale)
models of pentamode lattices confined between rigid plates and equipped with rigid
connections. Finally, it discusses the potential use of such systems for the base isolation of
existing buildings. Through experimental arguments, we show that the mecha...
The purpose of this work is to study the effects of site conditions on the inelastic dynamic analysis of a reinforced concrete (R/C) bridge by simultaneously considering an analysis of the surrounding soil profile via the Boundary Element Method (BEM). The first step is to model seismic waves propagating through complex geological profiles and acco...
The present study is focusing on the experimental and numerical evaluation of the effectiveness of an anti- seismic steel device. The developed device, mentioned as CAR1, belongs to the passive energy dissipation systems, as it does not require external power to generate system control forces. It can be used on new or existing structures and can be...
This study concerns the mechanical response of an innovative energy
dissipation device. Using this device, beam–column frames can be easily and safely
strengthened at many predefined levels according to the seismic load demands of technical
standards. The energy dissipation mechanism of the superimposed blades functions via both
steel yielding and...
Bridge rocking isolation has attracted the interest of the bridge engineering community, as it minimises damage in the
structural system, which conforms to the objectives for resilient and sustainable bridges. Two fundamentally different
approaches have emerged in recent years: (a) structural rocking isolation, where the piers (cast-in-situ or prec...
The developed device, has the codename CAR1, belongs to the passive energy dissipation systems, as it doesn't require external power to generate system control forces. It can be used on new or existing structures and can be easily adapted to the particular demands of structures. It can be installed in a variety of ways such as in single or X diagon...
The aim of this study is to investigate the micro-behavior of the CAR1 device. This device was presented by Papadopoulos et al [1] and has the advantages to (i) provide additional stiffness as well as (ii) absorption of seismic energy, (iii) provide control of the axial forces that are developed at the diagonal steel rods. Last but not least, it ha...
This study presents a numerical investigation of the influence of spatial variability of earthquake ground motion, site effects and Soil-Structure Interaction (SSI) phenomena on the inelastic dynamic analysis of bridge structures, considering a 2D analysis of the soil profile via Boundary Element Method (BEM). First, seismic waves propagating throu...
It is well established that local site conditions can exert a crucial influence on the severity of structural damage (especially in extended structures) and its spatial distribution during earthquakes. Such influence is traditionally evaluated using simple models based on 1D description of local soil profile and seismic wave propagation. Thus, the...
Passive energy dissipation systems do not require external power to generate system control forces and hence, are easy and cheap to implement in a structure (existing or new). The new seismic energy absorption device, which is presented in this paper, is an improvement of the device CAR, proposed by Papadopoulos et al (2008) and it is incorporated...
Previous studies showed that seat type abutments, which are not considered to participate in the earthquake resisting system (ERS) of bridges, can reduce, with the assistance of the backfill soil, the seismic actions of bridges. In this framework, the seismic efficiency of a new seat-type abutment was studied. The new abutment decouples the in-serv...
