Ciro Del Vecchio

Ciro Del Vecchio
Università degli Studi del Sannio | UniSannio · Department of Engineering (DING)

PhD

About

49
Publications
31,464
Reads
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687
Citations
Additional affiliations
January 2018 - present
University of Naples Federico II
Position
  • Professor (Assistant)
Description
  • Experimental and analytical modeling of existing structures. Loss-assessment and cost-benefit analysis of retrofit alternatives. Seismic retrofitting by using innovative materials.
August 2015 - February 2016
University of Canterbury
Position
  • PostDoc Position
Description
  • Actual repair costs and comparison with available loss-assement methodologies. Advanced non-linear modeling of existing structures. Development and validation of displacement-based simplified approches for non-linear analysis
February 2012 - August 2014
University of Toronto
Position
  • Visiting PhD

Publications

Publications (49)
Article
Full-text available
Field surveys showed that the fabrication of infill, with particular emphasis on the connection with the surrounding reinforced concrete (RC) frame, may have a significant influence on the global response, earthquake damage and on the actions transmitted to the surrounding RC members. This study reports and discusses the outcomes of an experimental...
Experiment Findings
Full-text available
Article
Full-text available
Recent devastating earthquakes have shown that existing reinforced concrete (RC) buildings that rely on shear walls may exhibit damage and cracking. The majority of seismic actions are borne by shear walls; hence, the quantification of their residual post-earthquake capacity is critical. Moreover, the repair interventions that are typically impleme...
Article
Full-text available
Recent earthquakes demonstrated that modern seismic design and retrofit of constructions should target damage containment to reduce the direct and indirect economic losses and downtime. In this context, the use of base isolation as seismic protection strategy is becoming popular. A variety of devices is available on the market. Elastomeric and meta...
Article
Full-text available
Base isolation applications are becoming popular in the seismic design of resilient structures and infrastructures. Even though the response of the bearings is widely studied under cyclic displacements, limited information is available for bearing response under sustained lateral loads. These types of loads can develop sustained lateral displacemen...
Chapter
Existing reinforced concrete buildings were mainly designed with old code provisions. This resulted in lack of proper seismic details and, in turn, the occurrence of premature brittle failures as frequently observed in the aftermath of recent seismic events. The shear failure of the joint panel is one of the main reason limiting the seismic perform...
Article
Full-text available
Post-earthquake observations have outlined the poor seismic performance of substandard reinforced concrete (RC) beam-column joints in existing buildings. They often exhibit significant cracking even under moderate intensity earthquakes, compromising the seismic performance of the entire building. This makes the quantification of their residual capa...
Article
Full-text available
Recent seismic events have demonstrated that the high vulnerability of existing reinforced concrete (RC) buildings is mainly due to a lack of proper seismic detailing and the employment of poor-quality concrete. The reconstruction process following the 2009 L’Aquila earthquake highlighted that strengthening these buildings using solutions based on...
Code
JOINT FRP v.1.0 (Rilasciato in versione beta in attesa della versione definitiva) è un software per la progettazione del rinforzo dei nodi trave-pilastro di edifici esistenti incemento armato (c.a.) con materiali compositi fibrorinforzati (FRP). L’approccio di calcolo impiegato risulta in accordo con le vigenti norme tecniche D.M. 17 gennaio 2018 “...
Conference Paper
Substandard reinforced concrete (RC) joints often exhibited poor seismic performance even under moderate intensity earthquakes, which is due to the lack of earthquake-resistant design detailing. Premature joint cracking often compromises the seismic performance of the entire building, initiating local collapses or global failure mechanisms. The qua...
Article
Full-text available
The paper illustrates the seismic performance assessment of a bridge substructure simulating typical existing Italian highway bridges. The reference structural system is a reinforced concrete (RC) 1:3 scale single span bridge, tested on the shaking table system at the University of Naples, Italy. The testing facility consists of two 3m x 3m square...
Article
Full-text available
Nowadays, most of the Italian existing reinforced concrete (RC) buildings have become obsolescent and not compliant with modern requirements in terms of seismic safety, energy efficiency and living comfort. Many of them require a deep renovation to comply with minimum acceptable targets. In the last decade, major economic resources have been invest...
Article
Full-text available
The existing reinforced concrete buildings typical of the Mediterranean area commonly have poor seismic performance and high vulnerability to the seismic events. As demonstrated by recent post-earthquake reconstruction processes, they commonly exhibited significant damage to structural components and to infills and partitions resulting in very high...
Article
Full-text available
Generating the nonlinear behavior of substandard beam‐column joints is challenging. Difficulties arise even more in reproducing the contribution of different nonlinear mechanisms (and their mutual effects) on the global cyclic response. This paper deals with the advanced numerical modeling of substandard reinforced concrete (RC) beam‐column joints...
Article
Full-text available
Experiments have demonstrated the effectiveness of fiber-reinforced polymer (FRP) materials for the seismic strengthening of deficient reinforced concrete (RC) beam-column joints. However, only a few studies have focused on the seismic response of joint subassemblies that are designed to withstand moderate seismic actions where a strong column-weak...
Article
Full-text available
Modern seismic design and the retrofitting of buildings necessarily need to account for expected economic losses. Available refined and simplified procedures implemented in automatic computer tools allow for probabilistic loss assessments. These mostly rely on consequence functions derived by simulating the repair actions needed to restore a compon...
Article
The 2017 New Zealand Society for Earthquake Engineering (NZSEE) guidelines for seismic assessment of buildings recommends using Simple Lateral Mechanism Analysis (SLaMA) before implementing numerical analyses. The method and the NZSEE guidelines have been enhanced from the 2006 version, resulting into an efficient procedure, balancing simplicity an...
Article
Full-text available
The Italian “Guidelines for the seismic risk classification of constructions” approved in February 2017 define the technical principles for exploiting tax deductions with respect to seismic strengthening interventions on existing buildings (Sismabonus). Tax deductions represent a unique opportunity to improve the seismic safety of the existing Ital...
Article
Full-text available
The Italian “Guidelines for the seismic risk classification of constructions” approved in February 2017 define the technical principles for exploiting tax deductions with respect to seismic strengthening interventions on existing buildings (Sismabonus). Tax deductions represent a unique opportunity to improve the seismic safety of the existing Ital...
Article
Full-text available
The new guidelines for the seismic assessment of existing buildings recently introduced by the New Zealand Society for Earthquake Engineering (NZSEE) recommend the Simple Lateral Mechanism Analysis (SLaMA) as an “analytical” first phase of any other numerically-based analysis. This article illustrates the development of the SLaMA method and its val...
Chapter
Existing RC buildings of the Mediterranean area commonly show high variability in the material mechanical properties because of the construction age and manufacturing processes. Such a variability has been confirmed by number of in-situ tests performed during the reconstruction process in the aftermath of L’Aquila 2009 earthquake. In this context,...
Article
Full-text available
This study deals with the seismic behavior of old-type reinforced concrete (RC) beam-column joint and the effectiveness of an innovative application of Fiber Reinforced Concrete (FRC) as seismic strengthening solution. Two real joint subassemblies were extracted from an existing building damaged and demolished after the L'Aquila 2009 earthquake and...
Article
Full-text available
Recent seismic events are a unique opportunity to monitor and collect details of direct repair costs and the downtimes associated with massive reconstruction processes. This paper focuses on the actual repair costs of five RC buildings damaged by the 2009 L’Aquila earthquake. The repair costs for structural and non-structural components that experi...
Article
Field surveys in the aftermath of major seismic events, laboratory tests and numerical studies outlined that existing reinforced concrete (RC) structures are likely to exhibit premature shear failures. However, a proper quantification of the shear capacity of existing members with seismic details nonconforming to current seismic code is still a cha...
Technical Report
Full-text available
This report presents the simplified seismic assessment of a case study reinforced concrete (RC) building following the newly developed and refined NZSEE/MBIE guidelines on seismic assessment (NZSEE/MBIE, semi-final draft 26 October 2016). After an overview of the step-by-step ‘diagnostic’ process, including an holistic and qualitative description o...
Conference Paper
Full-text available
A reliable estimation of the seismic performances of existing reinforced concrete building is of paramount importance to design proper retrofit solutions. Number of refined numerical models are nowadays available, nevertheless predicting the seismic performance and the earthquake damage at component level is still a challenging task. Marked nonline...
Conference Paper
Full-text available
The seismic assessment of an existing structure is a complex procedure. In the evaluation of the structural capacity, difficulties arise in the definition of the lateral resisting members , in the estimation of the lateral capacity from component to system level. The identification of the local and global mechanisms, depending on the hierarchy of s...
Article
Full-text available
The “Guidelines for the seismic risk classification of the constructions”, approved in February 2017 by the Consiglio superiore dei Lavori Pubblici, (Ministry law n.58, 28/02/2017), define the technical principles to exploit tax deductions in case of seismic strengthening interventions on buildings (Sismabonus). This represents a unique opportunity...
Conference Paper
Full-text available
Recent seismic events confirmed the high vulnerability of existing buildings and highlighted the importance to quantify the attained losses and optimize the economic resources in the reconstruction phases. According to modern seismic design standards, damage to structural and non-structural elements are expected during the design-level seismic even...
Conference Paper
Existing RC buildings of the Mediterranean area commonly show high variability in the material mechanical properties because of the construction age and manufacturing processes. Such a variability has been confirmed by number of in-situ tests performed during the reconstruction process in the aftermath of L’Aquila 2009 earthquake. In this context,...
Conference Paper
The recent L’Aquila earthquake (2009) confirmed the high vulnerability of existing reinforced concrete (r.c.) structures to seismic events. Indeed, after a critical survey conducted on the post-earthquake heavily damaged RC buildings, a large occurrence of column brittle failures governed by shear forces has been recognised. An overview of r.c. str...
Conference Paper
Seismic loss-assessment can play a key role in modern earthquake engineering. It can be a useful supporting tool, during either a design or an assessment/retrofit process, to predict direct and indirect costs related to a seismic event or scenario. The FEMA P-58 document represents a major outcome of a significant effort to make loss assessment pro...
Article
The recent seismic events demonstrated that the high vulnerability of existing RC structures is often related to the joint subassemblies shear failure which may lead to the collapse of the entire structural system. However, most of the available computer programs do not properly account for this aspect. This paper deals with the numerical seismic a...
Conference Paper
Full-text available
The assessment of existing infrastructures is a critical issue in the seismic protection of the modern societies. Field surveys in the aftermath of major seismic events have demonstrated the high vulnerability of highway bridges. This led to an increasing interest in the seismic performance assessment of existing bridges. The present paper deals wi...
Conference Paper
Full-text available
The structural damage of reinforced concrete (RC) or masonry constructions, is commonly, associated with nonlinear phenomena that make the analysis of the structural behavior a challenging task. This is even more difficult for shear critical structures. Furthermore , the severe cracking may be associated, in these cases, with an incipient collapse,...
Article
Full-text available
The high vulnerability of existing reinforced concrete (RC) structural systems is often related to brittle failures of critical members. Field surveys and relevant scientific studies showed that unconfined and poorly detailed beam-column joints were not able to resist moderate-to-large seismic events. Several strengthening techniques have been prop...
Article
Full-text available
The nonlinear behavior of reinforced concrete (RC) members represents a key issue in the seismic performance assessment of structures. Many structures constructed in the 1980s or earlier were designed based on force limits; thus they often exhibit brittle failure modes, strength and stiffness degradation, and severe pinching effects. Field surveys...
Article
Premature brittle failures because of seismic actions strongly affect the behavior of existing reinforced concrete (RC) structural systems. They commonly involve exterior beam-column joints of structures designed without transverse reinforcement. This paper investigates the behavior of unconfined joints that do not conform to current seismic codes...
Conference Paper
Major seismic events have shown the high vulnerability of existing RC structures, especially for those designed according to obsolete code provisions. Field surveys have identified the brittle failure modes of poorly detailed beam-column joints as one of the main cause of vulnerability. This encouraged the scientific studies to investigate their se...
Conference Paper
It is generally recognized that the prediction of shear capacity of Reinforced Concrete (RC) members is still quite a challenging task. In the past years several capacity models have been developed in order to assess the shear strength of RC members subjected to cyclic loads; however, the absence of an unique accepted theory creates lot of uncertai...
Conference Paper
The paper presents results from numerical analyses of reinforced concrete (RC) elements subjected to cyclic load. Many nonlinear numerical models have been proposed in literature to capture the cyclic behaviour of reinforced concrete (RC) elements. Depending on the expected level of accuracy and computational efficiency, numerical models employ dif...
Conference Paper
Recent seismic events have clearly confirmed the vulnerability of existing reinforced concrete (RC) structures. In particular, the premature failure of partially confined (i.e. exterior) beam-column joints has been identified as one of the main cause limiting the structural seismic capacity. Poor attention to details and lacking of adequate transve...

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Projects

Projects (3)
Project
Recent seismic events pointed out the high vulnerability of the existing buildings and the relevant direct and indirect economic losses, injuries and fatalities. The monitoring of the post-earthquake reconstruction processes allowed to have a detailed quantification of economic resources needed for the repair and strengthening of exiting constructions. These data are of paramount importance for the scientific community, government agencies as-well-as for insurance and re-insurance companies to calibrate reliable consequence functions or benchmark loss-assessment and risk-assessment methodologies. To date, modern seismic engineering should reliably quantify the seismic losses in order to design low-damage constructions or proper retrofit solutions for existing building. In this context, the economic incentives in the form of tax-deduction included in the recent government budget laws may favourite the implementation of seismic mitigation strategies at large scale leading to more resilient communities. This special session aims at attracting research contributions from the scientific and professional community dealing with the development or application of loss-assessment methodologies. Papers dealing with the comparison of different methodologies, analysis of reconstruction costs, insurance or re-insurance policies, implementation and comparison of different construction/retrofit solutions aimed at the containment of earthquake losses are of particular interest.
Project
Development and Validation of: a) Seismic Assessment Methodologies and Procedures; b) Retrofit Strategies and Techniques for individual buildings or classes of Building; c) Seismic Classifications and Risk Reduction strategies at Territorial Scale. The Project comprise Analytical, Numerical, Experimental Investigations and post-earthquake damage observations.