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Dr. Maria Teresa De Risi
University of Naples Federico II – Department of Structures for Engineering and Architecture, 80138 Naples, Italy

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0 Earthquake Engineering
0 experimental testing
0 Structural modelling
0 RC structures
0 Seismic assessment of existing buildings

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Seismic assessment of existing buildings
Earthquake Engineering
RC structures

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Journal article
Published: 07 March 2021 in Journal of Earthquake Engineering
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This work aims estimating seismic losses in residential-reinforced concrete buildings, highlighting the influence of infills and services. First, the mechanical-based “POST”-method is used to perform simplified (nonlinear static) structural analyses, in the “shear-type” building hypothesis. Then, drift-based fragility curves and repair cost analysis, specific for infills and services, are used to obtain expected damage and losses. Lastly, the whole proposed loss assessment methodology is applied to a wide building stock struck by L’Aquila (Italy) 2009-earthquake and damaged to infills. The numerical-versus-observed comparison of damage scenario and seismic losses allows a promising validation of the procedure.

ACS Style

Carlo Del Gaudio; Maria Teresa De Risi; Gerardo Mario Verderame. Seismic Loss Prediction for Infilled RC Buildings via Simplified Analytical Method. Journal of Earthquake Engineering 2021, 1 -34.

AMA Style

Carlo Del Gaudio, Maria Teresa De Risi, Gerardo Mario Verderame. Seismic Loss Prediction for Infilled RC Buildings via Simplified Analytical Method. Journal of Earthquake Engineering. 2021; ():1-34.

Chicago/Turabian Style

Carlo Del Gaudio; Maria Teresa De Risi; Gerardo Mario Verderame. 2021. "Seismic Loss Prediction for Infilled RC Buildings via Simplified Analytical Method." Journal of Earthquake Engineering , no. : 1-34.

Original research article
Published: 26 November 2020 in Frontiers in Built Environment
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The lessons learned after recent earthquakes have highlighted the key role played by infills and services in damage and loss of Reinforced Concrete (RC) buildings. Their influence in seismic performance and loss estimation of selected RC building case studies is thoroughly analyzed here. The case study selection aims to be representative of existing buildings built in Italy before 1970, and covers a different number of stories and design typologies. The seismic responses of the case-study buildings are numerically analyzed by means of non-linear static pushover analysis (PO) considering a lumped plasticity approach with a quadri-linear flexural response for beam/column elements (properly calibrated for RC elements reinforced with plain bars) and a tri-linear compressive-only axial response with diagonal concentric struts for infill panels (empirically derived from experimental data on hollow clay masonry walls). Economic loss estimation is carried out via a component-based methodology that relies on the main repairing activities and resultant costs required for the refurbishment of infills and services for different damage levels. Accordingly, a damage analysis is performed herein, given the intensity measure, based on a comparison between Interstory drift demand from PO analysis and drift-based fragility functions specific for masonry infills. Loss curves, relating the total building repair cost to peak ground acceleration (PGA), are presented and compared for the analyzed case study buildings to show their trends and quantify the incidence of infills and services with respect to the reconstruction cost. A comparison between these outcomes and those recently found in the literature emphasizes the robustness of the considered approach and the reliability of the hypotheses about damage and loss assessment.

ACS Style

Carlo Del Gaudio; Maria Teresa De Risi; Santa Anna Scala; Gerardo Mario Verderame. Seismic Loss Estimation in Pre-1970 Residential RC Buildings: The Role of Infills and Services in Low–Mid-Rise Case Studies. Frontiers in Built Environment 2020, 6, 1 .

AMA Style

Carlo Del Gaudio, Maria Teresa De Risi, Santa Anna Scala, Gerardo Mario Verderame. Seismic Loss Estimation in Pre-1970 Residential RC Buildings: The Role of Infills and Services in Low–Mid-Rise Case Studies. Frontiers in Built Environment. 2020; 6 ():1.

Chicago/Turabian Style

Carlo Del Gaudio; Maria Teresa De Risi; Santa Anna Scala; Gerardo Mario Verderame. 2020. "Seismic Loss Estimation in Pre-1970 Residential RC Buildings: The Role of Infills and Services in Low–Mid-Rise Case Studies." Frontiers in Built Environment 6, no. : 1.

Journal article
Published: 05 November 2020 in Engineering Structures
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The out-of-plane (OOP) response of unreinforced masonry (URM) infill walls under seismic loading has been widely studied in very recent times with both experimental and numerical investigations. It is recognized that the damage of infills due to in-plane (IP) seismic actions has a significant influence on their OOP response, by reducing the OOP strength and stiffness: this phenomenon is named IP/OOP interaction. Current code provisions propose the use of formulations derived from the literature to predict the OOP strength reduction due to IP damage. In this study, experimental tests are performed to assess the IP damage effects on the OOP response of square URM infills with relatively low slenderness ratio in reinforced concrete frames. Tests’ results are used to enrich the currently available experimental database, to assess the effectiveness of current provisions regarding the prediction of the IP/OOP interaction effects and to propose empirical formulations for the prediction of the IP/OOP interaction effects in terms of OOP strength and stiffness reduction as a function of geometric properties of the infill (namely, the slenderness ratio and the aspect ratio) and of the IP displacement demand.

ACS Style

Mariano Di Domenico; Maria Teresa De Risi; Paolo Ricci; Gerardo M. Verderame; Gaetano Manfredi. Empirical prediction of the in-plane/out-of-plane interaction effects in clay brick unreinforced masonry infill walls. Engineering Structures 2020, 227, 111438 .

AMA Style

Mariano Di Domenico, Maria Teresa De Risi, Paolo Ricci, Gerardo M. Verderame, Gaetano Manfredi. Empirical prediction of the in-plane/out-of-plane interaction effects in clay brick unreinforced masonry infill walls. Engineering Structures. 2020; 227 ():111438.

Chicago/Turabian Style

Mariano Di Domenico; Maria Teresa De Risi; Paolo Ricci; Gerardo M. Verderame; Gaetano Manfredi. 2020. "Empirical prediction of the in-plane/out-of-plane interaction effects in clay brick unreinforced masonry infill walls." Engineering Structures 227, no. : 111438.

Original research
Published: 10 September 2020 in Bulletin of Earthquake Engineering
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The reliable estimation of seismic losses due to damage to buildings is paramount for the post-emergency management and the planning of recovery activities. For residential reinforced concrete (RC) infilled buildings, a significant role in the computation of seismic loss is played by non-structural components, above all infills, partitions and services, as shown in past earthquakes. In this work, a component-based methodology is proposed to assess seismic losses for residential RC buildings in Mediterranean region. The attention is focused on the repairing activities for masonry infills (typical enclosure or partitions elements in Italian and Mediterranean RC buildings), and for services (plumbing systems, electric equipment, floor/wall tiles…), commonly enclosed within the infill panels for the considered building typology. The described methodology can be used starting from the expected damage level to infills and partitions. It adopts given repair unit costs at different damage states of infills. The loss estimation methodology has been, first, validated by comparing predicted and actual repair costs for specific case-study buildings damaged by L’Aquila (Italy) 2009 earthquake. Then, the methodology has been applied to a wide dataset of RC buildings (about 2500 residential buildings) damaged by L’Aquila earthquake available from the literature, to show its possible application at a large-scale level. A good agreement between observed and predicted costs is obtained both for specific case-study buildings and for the wider building stock, especially when damage to structural components is very limited.

ACS Style

Maria Teresa De Risi; Carlo Del Gaudio; Gerardo Mario Verderame. A component-level methodology to evaluate the seismic repair costs of infills and services for Italian RC buildings. Bulletin of Earthquake Engineering 2020, 18, 6533 -6570.

AMA Style

Maria Teresa De Risi, Carlo Del Gaudio, Gerardo Mario Verderame. A component-level methodology to evaluate the seismic repair costs of infills and services for Italian RC buildings. Bulletin of Earthquake Engineering. 2020; 18 (14):6533-6570.

Chicago/Turabian Style

Maria Teresa De Risi; Carlo Del Gaudio; Gerardo Mario Verderame. 2020. "A component-level methodology to evaluate the seismic repair costs of infills and services for Italian RC buildings." Bulletin of Earthquake Engineering 18, no. 14: 6533-6570.

Editorial
Published: 06 August 2020 in Advances in Civil Engineering
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One major challenge of earthquake risk mitigation is the assessment of existing buildings not designed with modern codes and the development of effective strengthening techniques. The design of new building structures is also of paramount importance since infills are still currently neglected (or a lot of information is missing) by most of the seismic codes. Special attention should be paid to reinforced concrete (RC) frame structures with masonry infill panels, as proved by their poor performance in recent earthquakes. Accurate modelling strategies and appropriate seismic assessment methodologies for new or existing infilled buildings are crucial to understand their behaviour and to develop efficient and appropriate mitigation measures to prevent high level of damage, casualties, and economic losses. The effect of the combined in-plane and out-of-plane behaviour interaction of the infill masonry walls in the RC structure seismic behaviour, the local shear interaction between the RC frame and the masonry infill, the development of analytical formulations that could help design engineers are still open issues, among others, on this topic.

ACS Style

André Furtado; Maria Teresa De Risi; Hemchandra Chaulagain; Ibrahim Misir; Tanja Šipoš. Recent Advances on Analysis Methods and Modelling Approaches for Seismic Assessment and Design of Infilled RC Buildings. Advances in Civil Engineering 2020, 2020, 1 -1.

AMA Style

André Furtado, Maria Teresa De Risi, Hemchandra Chaulagain, Ibrahim Misir, Tanja Šipoš. Recent Advances on Analysis Methods and Modelling Approaches for Seismic Assessment and Design of Infilled RC Buildings. Advances in Civil Engineering. 2020; 2020 ():1-1.

Chicago/Turabian Style

André Furtado; Maria Teresa De Risi; Hemchandra Chaulagain; Ibrahim Misir; Tanja Šipoš. 2020. "Recent Advances on Analysis Methods and Modelling Approaches for Seismic Assessment and Design of Infilled RC Buildings." Advances in Civil Engineering 2020, no. : 1-1.

Journal article
Published: 01 June 2020 in Journal of Composites for Construction
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ACS Style

Maria Teresa De Risi; Ciro Del Vecchio; Paolo Ricci; Marco Di Ludovico; Andrea Prota; Gerardo Mario Verderame. Light FRP Strengthening of Poorly Detailed Reinforced Concrete Exterior Beam–Column Joints. Journal of Composites for Construction 2020, 24, 04020014 .

AMA Style

Maria Teresa De Risi, Ciro Del Vecchio, Paolo Ricci, Marco Di Ludovico, Andrea Prota, Gerardo Mario Verderame. Light FRP Strengthening of Poorly Detailed Reinforced Concrete Exterior Beam–Column Joints. Journal of Composites for Construction. 2020; 24 (3):04020014.

Chicago/Turabian Style

Maria Teresa De Risi; Ciro Del Vecchio; Paolo Ricci; Marco Di Ludovico; Andrea Prota; Gerardo Mario Verderame. 2020. "Light FRP Strengthening of Poorly Detailed Reinforced Concrete Exterior Beam–Column Joints." Journal of Composites for Construction 24, no. 3: 04020014.

Journal article
Published: 20 January 2020 in Engineering Structures
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Seismic events worldwide clearly showed that a crucial issue for life-safety and reduction of losses due to earthquakes for reinforced concrete (RC) buildings is related to the out-of-plane (OOP) collapse of infill masonry walls. In the literature, few studies addressed this paramount topic. This paper presents an experimental work about the assessment of possible strengthening solutions to prevent the out-of-plane collapse of masonry infills in RC buildings. Four nominally identical full-scale one-bay-one-story RC frames were built and infilled with a thin masonry wall made up of horizontal hollow clay bricks. The first specimen was representative of the as-built condition. The other specimens were strengthened against the out-of-plane collapse by means of Textile Reinforced Mortar (TRM) strengthening techniques based on the application of high-ductility or common mortar plaster and fiberglass reinforcing bidirectional nets, varying the TRM-to-RC frame connection’s effectiveness. Tests consisted of a semi-cyclic history of imposed displacements in the OOP direction through small uniformly distributed pneumatic jacks. Experimental results are shown and compared to assess the effectiveness of the selected strengthening techniques and to provide a support towards the choice of the best strategies for future further investigations and applications.

ACS Style

Maria Teresa De Risi; André Furtado; Hugo Rodrigues; José Melo; Gerardo Mario Verderame; Arêde António; Humberto Varum; Gaetano Manfredi. Experimental analysis of strengthening solutions for the out-of-plane collapse of masonry infills in RC structures through textile reinforced mortars. Engineering Structures 2020, 207, 110203 .

AMA Style

Maria Teresa De Risi, André Furtado, Hugo Rodrigues, José Melo, Gerardo Mario Verderame, Arêde António, Humberto Varum, Gaetano Manfredi. Experimental analysis of strengthening solutions for the out-of-plane collapse of masonry infills in RC structures through textile reinforced mortars. Engineering Structures. 2020; 207 ():110203.

Chicago/Turabian Style

Maria Teresa De Risi; André Furtado; Hugo Rodrigues; José Melo; Gerardo Mario Verderame; Arêde António; Humberto Varum; Gaetano Manfredi. 2020. "Experimental analysis of strengthening solutions for the out-of-plane collapse of masonry infills in RC structures through textile reinforced mortars." Engineering Structures 207, no. : 110203.

Journal article
Published: 25 November 2019 in Journal of Earthquake Engineering
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ACS Style

Gerardo M. Verderame; Paolo Ricci; Maria Teresa De Risi; Carlo Del Gaudio. Experimental Assessment and Numerical Modelling of Conforming and Non-Conforming RC Frames with and without Infills. Journal of Earthquake Engineering 2019, 1 -42.

AMA Style

Gerardo M. Verderame, Paolo Ricci, Maria Teresa De Risi, Carlo Del Gaudio. Experimental Assessment and Numerical Modelling of Conforming and Non-Conforming RC Frames with and without Infills. Journal of Earthquake Engineering. 2019; ():1-42.

Chicago/Turabian Style

Gerardo M. Verderame; Paolo Ricci; Maria Teresa De Risi; Carlo Del Gaudio. 2019. "Experimental Assessment and Numerical Modelling of Conforming and Non-Conforming RC Frames with and without Infills." Journal of Earthquake Engineering , no. : 1-42.

Journal article
Published: 14 May 2019 in Buildings
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The estimation of direct and indirect losses due to earthquakes is a key issue in the Performance Based Earthquake Engineering framework. In commonly adopted loss computation tools, no specific data related to masonry infill panels, widespread in moment-resisting-frame residential buildings, are available to perform a probabilistic assessment of losses. To fill this gap, specific fragility and loss functions have been recently proposed in the last years. To assess their validity and estimate the relevance of the repair costs due to infills after earthquakes with respect to the total reconstruction process, the present work analyses the Reinforced Concrete residential buildings with masonry infills struck by the 2009 L’Aquila (Italy) earthquake, focusing on the dataset of “lightly” damaged buildings, where only damage to masonry infills occurred. Based on available data related to these buildings, the observed damage scenario after L’Aquila earthquake is first obtained. The repair costs for infills are estimated given this damage scenario. The resulting estimated repair costs are then compared with the actual repair costs presented in the available literature. The percentage influence of infills on the total repair costs due to earthquakes for residential buildings is lastly computed, resulting on average equal to the fifty percent.

ACS Style

Maria Teresa De Risi; Carlo Del Gaudio; Gerardo Mario Verderame. Evaluation of Repair Costs for Masonry Infills in RC Buildings from Observed Damage Data: the Case-Study of the 2009 L’Aquila Earthquake. Buildings 2019, 9, 122 .

AMA Style

Maria Teresa De Risi, Carlo Del Gaudio, Gerardo Mario Verderame. Evaluation of Repair Costs for Masonry Infills in RC Buildings from Observed Damage Data: the Case-Study of the 2009 L’Aquila Earthquake. Buildings. 2019; 9 (5):122.

Chicago/Turabian Style

Maria Teresa De Risi; Carlo Del Gaudio; Gerardo Mario Verderame. 2019. "Evaluation of Repair Costs for Masonry Infills in RC Buildings from Observed Damage Data: the Case-Study of the 2009 L’Aquila Earthquake." Buildings 9, no. 5: 122.

Journal article
Published: 04 April 2019 in Engineering Structures
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The analysis of the behaviour of masonry infills under out-of-plane (OOP) and in-plane (IP) loading is paramount to correctly assess the seismic performance of reinforced concrete (RC) frames. A very important issue about this topic is certainly the IP/OOP interaction, namely the analysis of how the IP damage, which affects infills during earthquakes, can influence their OOP behaviour (and vice-versa). Some studies about this topic were developed in the last years; nevertheless, only a dozen of tests currently exists in the literature to experimentally explore this key issue. This work first presents an experimental campaign carried out on square infill walls in RC frames to investigate about the OOP behaviour of the masonry infills, and about the IP/OOP interaction. On the whole, four specimens have been tested under OOP monotonic loading. Three of them have been first damaged under cyclic IP actions, with different extent; the remaining one, used as a reference, was tested under OOP loading only. The experimental campaign is described in detail in terms of specimens’ characteristics, material properties, adopted setup and instrumentation layout. The experimental results are analysed in terms of IP and OOP force-displacement responses, vertical arch strength contribution evolutions, and damage state evolutions, and compared with prediction proposals from the literature. Then, the influence of the infill aspect ratio (width (w)-to-height (h) ratio) on the IP/OOP interaction is investigated by means of the comparison between data presented herein (collected on infills with w/h = 1) and a companion experimental campaign previously performed on nominally identical infills except that for the aspect ratio of the specimens (in that case, higher than the unit). It has been observed that under given IP drift levels, square infills presented lower IP damage levels with respect to rectangular infills (with w/h > 1), thus generally producing a less pronounced detrimental effect of the IP imposed drift on the OOP strength. Nevertheless, none of the predictions from literature takes into account the role of the aspect ratio on the IP/OOP interaction, generally resulting in conservative predictions, to be improved in future works.

ACS Style

Maria Teresa De Risi; Mariano Di Domenico; Paolo Ricci; Gerardo Mario Verderame; Gaetano Manfredi. Experimental investigation on the influence of the aspect ratio on the in-plane/out-of-plane interaction for masonry infills in RC frames. Engineering Structures 2019, 189, 523 -540.

AMA Style

Maria Teresa De Risi, Mariano Di Domenico, Paolo Ricci, Gerardo Mario Verderame, Gaetano Manfredi. Experimental investigation on the influence of the aspect ratio on the in-plane/out-of-plane interaction for masonry infills in RC frames. Engineering Structures. 2019; 189 ():523-540.

Chicago/Turabian Style

Maria Teresa De Risi; Mariano Di Domenico; Paolo Ricci; Gerardo Mario Verderame; Gaetano Manfredi. 2019. "Experimental investigation on the influence of the aspect ratio on the in-plane/out-of-plane interaction for masonry infills in RC frames." Engineering Structures 189, no. : 523-540.

Research paper
Published: 10 December 2018 in International Journal of Civil Engineering
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This study aims contributing to the investigation about the shear strength of reinforced concrete members with hollow circular cross-section and ordinary concrete strength. First, a proper experimental database of tests carried out in the literature on hollow circular members is collected and analysed. Then, the few existing shear strength models from the literature or seismic codes considered suitable for hollow circular sections are discussed and compared with the experimental results. Starting from the lonely specific degrading model existing in the literature, new equations are proposed on mechanical bases for concrete, transverse reinforcement and axial load contributions to the shear strength and for the shear strength degradation due to increasing ductility demand. The new proposed model is finally validated by means of the collected experimental data. Numerical-versus-experimental comparisons show very good results in terms of predicting capacity of both maximum (not-degraded) and degraded shear strength. The relative percentage prediction error always results lower than 4% with a very limited dispersion. The proposed equations can be thus considered as a reliable improvement of existing shear strength models for the investigated structural typology.

ACS Style

Paolino Cassese; Maria Teresa De Risi; Gerardo Mario Verderame. A degrading shear strength model for R.C. columns with hollow circular cross-section. International Journal of Civil Engineering 2018, 17, 1241 -1259.

AMA Style

Paolino Cassese, Maria Teresa De Risi, Gerardo Mario Verderame. A degrading shear strength model for R.C. columns with hollow circular cross-section. International Journal of Civil Engineering. 2018; 17 (8):1241-1259.

Chicago/Turabian Style

Paolino Cassese; Maria Teresa De Risi; Gerardo Mario Verderame. 2018. "A degrading shear strength model for R.C. columns with hollow circular cross-section." International Journal of Civil Engineering 17, no. 8: 1241-1259.

Articles
Published: 09 November 2018 in Journal of Earthquake Engineering
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This study investigates the seismic response of reinforced concrete buildings designed according to the current Italian building code. Number of stories, site hazard, presence and distribution of masonry infill panels, and type of lateral resisting system are the key investigated parameters. The main issues related to design and modeling are discussed. Two Limit States are considered, namely Global Collapse and Usability-Preventing Damage. The main aim of the study is a comparison between the seismic response of the buildings, investigated through nonlinear static and dynamic analyses. Irregularity in the distribution of infill panels and site hazard emerge as the most influential parameters.

ACS Style

Paolo Ricci; Vincenzo Manfredi; Fabrizio Noto; Marco Terrenzi; Crescenzo Petrone; Francesca Celano; Maria Teresa De Risi; Guido Camata; Paolo Franchin; Gennaro Magliulo; Angelo Masi; Fabrizio Mollaioli; Enrico Spacone; Gerardo M. Verderame. Modeling and Seismic Response Analysis of Italian Code-Conforming Reinforced Concrete Buildings. Journal of Earthquake Engineering 2018, 22, 105 -139.

AMA Style

Paolo Ricci, Vincenzo Manfredi, Fabrizio Noto, Marco Terrenzi, Crescenzo Petrone, Francesca Celano, Maria Teresa De Risi, Guido Camata, Paolo Franchin, Gennaro Magliulo, Angelo Masi, Fabrizio Mollaioli, Enrico Spacone, Gerardo M. Verderame. Modeling and Seismic Response Analysis of Italian Code-Conforming Reinforced Concrete Buildings. Journal of Earthquake Engineering. 2018; 22 (sup2):105-139.

Chicago/Turabian Style

Paolo Ricci; Vincenzo Manfredi; Fabrizio Noto; Marco Terrenzi; Crescenzo Petrone; Francesca Celano; Maria Teresa De Risi; Guido Camata; Paolo Franchin; Gennaro Magliulo; Angelo Masi; Fabrizio Mollaioli; Enrico Spacone; Gerardo M. Verderame. 2018. "Modeling and Seismic Response Analysis of Italian Code-Conforming Reinforced Concrete Buildings." Journal of Earthquake Engineering 22, no. sup2: 105-139.

Original research
Published: 24 October 2018 in Bulletin of Earthquake Engineering
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Earthquakes that have occurred in the last twenty years in the Mediterranean area have had significant economic and social impacts. Most of the economic losses of reinforced concrete (RC) frames was due to nonstructural component damage, particularly masonry infills and partitions. Therefore, the seismic behaviour of masonry infills should be reliably characterized. The main goals of this study for a more reliable loss estimation for infilled RC frames are: (i) the analysis of the inter-story drift ratio (IDR) capacity at given damage states (DSs) with the aim to define drift-based fragility functions and (ii) analyse direct losses due to infill damage following seismic events. First, a database of experimental tests performed on 1-bay, 1-story scaled RC frames infilled with clay bricks or concrete blocks is collected. Drift-based fragility curves are obtained, which depend on the infill brick materials and properties. Then, the drift capacity threshold at each DS is correlated to the in-plane response of the infill panel to directly quantify the relationship that exists among them. The influence of openings on drift capacities is also evaluated. Then, seismic losses related to infills are computed, providing expected monetary losses depending on the infill typology. The required reparation activities and their costs are also listed. The bearing of each activity and cost at each DS is explicitly evaluated. Additionally, loss functions that directly depend on IDR demand are provided, thus fusing together the damage analysis and loss analysis. Finally, a simplified formulation for loss functions is proposed for a simple, practice-oriented loss calculation.

ACS Style

Carlo Del Gaudio; Maria Teresa De Risi; Paolo Ricci; Gerardo Mario Verderame. Empirical drift-fragility functions and loss estimation for infills in reinforced concrete frames under seismic loading. Bulletin of Earthquake Engineering 2018, 17, 1285 -1330.

AMA Style

Carlo Del Gaudio, Maria Teresa De Risi, Paolo Ricci, Gerardo Mario Verderame. Empirical drift-fragility functions and loss estimation for infills in reinforced concrete frames under seismic loading. Bulletin of Earthquake Engineering. 2018; 17 (3):1285-1330.

Chicago/Turabian Style

Carlo Del Gaudio; Maria Teresa De Risi; Paolo Ricci; Gerardo Mario Verderame. 2018. "Empirical drift-fragility functions and loss estimation for infills in reinforced concrete frames under seismic loading." Bulletin of Earthquake Engineering 17, no. 3: 1285-1330.

Journal article
Published: 01 August 2018 in Engineering Structures
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ACS Style

Maria Teresa De Risi; Carlo Del Gaudio; Paolo Ricci; Gerardo Mario Verderame. In-plane behaviour and damage assessment of masonry infills with hollow clay bricks in RC frames. Engineering Structures 2018, 168, 257 -275.

AMA Style

Maria Teresa De Risi, Carlo Del Gaudio, Paolo Ricci, Gerardo Mario Verderame. In-plane behaviour and damage assessment of masonry infills with hollow clay bricks in RC frames. Engineering Structures. 2018; 168 ():257-275.

Chicago/Turabian Style

Maria Teresa De Risi; Carlo Del Gaudio; Paolo Ricci; Gerardo Mario Verderame. 2018. "In-plane behaviour and damage assessment of masonry infills with hollow clay bricks in RC frames." Engineering Structures 168, no. : 257-275.

Original research
Published: 28 July 2018 in Bulletin of Earthquake Engineering
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Most of the existing Reinforced Concrete (RC) bridges were designed before the recent advancements in earthquake engineering and seismic codes. The performance assessment of these bridges is, therefore, a crucial issue for seismic safety of bridge infrastructures and estimation of losses due to seismic events. Despite the seismic assessment of columns with solid cross-section in ordinary buildings may be considered as quite comprehensive, a similar conclusion cannot be drawn for shear-critical hollow core piers, widespread in existing bridge structures. The present work aims at contributing to the investigation about the response of RC piers with hollow rectangular cross-section under cyclic loading. The main goal of the study is the definition of a comprehensive and practice-oriented modelling approach for the assessment of seismic response of RC hollow rectangular piers, able to account for all the deformability contributions, and, particularly, able to reliably predict drift-capacity at shear failure and subsequent degrading stiffness. A three-component model, accounting for flexural flexibility, shear flexibility and slippage of rebars is adopted. The shear capacity assessment is dealt with more in details. A proper experimental database is collected, made up of cyclic tests on hollow rectangular piers failing in shear, with or without yielding of longitudinal reinforcing bars. A new empirical formulation for the assessment of the displacement capacity at shear failure, specifically for the investigated structural elements, is calibrated. The degrading stiffness also is empirically calibrated to completely define the degrading shear response. Finally, the proposed numerical model is validated through the comparison with the experimental results carried out by the Authors (also in terms of local deformability contributions) and with test results collected from literature, proving that it can be a simple and reliable tool for the seismic assessment of existing shear-critical bridge piers.

ACS Style

Paolino Cassese; Maria Teresa De Risi; Gerardo Mario Verderame. A modelling approach for existing shear-critical RC bridge piers with hollow rectangular cross section under lateral loads. Bulletin of Earthquake Engineering 2018, 17, 237 -270.

AMA Style

Paolino Cassese, Maria Teresa De Risi, Gerardo Mario Verderame. A modelling approach for existing shear-critical RC bridge piers with hollow rectangular cross section under lateral loads. Bulletin of Earthquake Engineering. 2018; 17 (1):237-270.

Chicago/Turabian Style

Paolino Cassese; Maria Teresa De Risi; Gerardo Mario Verderame. 2018. "A modelling approach for existing shear-critical RC bridge piers with hollow rectangular cross section under lateral loads." Bulletin of Earthquake Engineering 17, no. 1: 237-270.

Original articles
Published: 15 May 2018 in Journal of Earthquake Engineering
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Experimental works in literature have paid proper attention to the seismic response of hollow circular piers only quite recently, despite their widespread use in existing bridges. Herein, experimental cyclic tests on two scaled reinforced concrete piers with hollow circular cross-section, representative of typical existing Italian bridges, are carried out. Design criteria, adopted setup, experimental response, and damage evolution are discussed. A focus on shear–critical piers is performed, collecting an experimental database of tests from literature. The more specific existing shear strength models are compared with the collected data. Model by Ranzo and Priestley [2001] has finally shown promising results.

ACS Style

Paolino Cassese; Maria Teresa De Risi; Gerardo Mario Verderame. Seismic Assessment of Existing Hollow Circular Reinforced Concrete Bridge Piers. Journal of Earthquake Engineering 2018, 24, 1566 -1601.

AMA Style

Paolino Cassese, Maria Teresa De Risi, Gerardo Mario Verderame. Seismic Assessment of Existing Hollow Circular Reinforced Concrete Bridge Piers. Journal of Earthquake Engineering. 2018; 24 (10):1566-1601.

Chicago/Turabian Style

Paolino Cassese; Maria Teresa De Risi; Gerardo Mario Verderame. 2018. "Seismic Assessment of Existing Hollow Circular Reinforced Concrete Bridge Piers." Journal of Earthquake Engineering 24, no. 10: 1566-1601.

Journal article
Published: 01 November 2017 in Engineering Structures
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ACS Style

Maria Teresa De Risi; Gerardo Mario Verderame. Experimental assessment and numerical modelling of exterior non-conforming beam-column joints with plain bars. Engineering Structures 2017, 150, 115 -134.

AMA Style

Maria Teresa De Risi, Gerardo Mario Verderame. Experimental assessment and numerical modelling of exterior non-conforming beam-column joints with plain bars. Engineering Structures. 2017; 150 ():115-134.

Chicago/Turabian Style

Maria Teresa De Risi; Gerardo Mario Verderame. 2017. "Experimental assessment and numerical modelling of exterior non-conforming beam-column joints with plain bars." Engineering Structures 150, no. : 115-134.

Conference paper
Published: 01 January 2017 in Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015)
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ACS Style

Paolino Cassese; Maria Teresa De Risi; Gerardo Mario Verderame. CAPACITY MODELS FOR SHEAR-CRITICAL RC BRIDGE PIERS WITH HOLLOW CROSS-SECTION. Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015) 2017, 1 .

AMA Style

Paolino Cassese, Maria Teresa De Risi, Gerardo Mario Verderame. CAPACITY MODELS FOR SHEAR-CRITICAL RC BRIDGE PIERS WITH HOLLOW CROSS-SECTION. Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015). 2017; ():1.

Chicago/Turabian Style

Paolino Cassese; Maria Teresa De Risi; Gerardo Mario Verderame. 2017. "CAPACITY MODELS FOR SHEAR-CRITICAL RC BRIDGE PIERS WITH HOLLOW CROSS-SECTION." Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015) , no. : 1.

Conference paper
Published: 01 January 2017 in Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015)
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ACS Style

Guido Camata; Francesca Celano; Maria Teresa De Risi; Paolo Franchin; Gennaro Magliulo; Vincenzo Manfredi; Angelo Masi; Fabrizio Mollaioli; Fabrizio Noto; Paolo Ricci; Enrico Spacone; Marco Terrenzi; Gerardo Verderame. RINTC PROJECT: NONLINEAR DYNAMIC ANALYSES OF ITALIAN CODE-CONFORMING REINFORCED CONCRETE BUILDINGS FOR RISK OF COLLAPSE ASSESSMENT. Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015) 2017, 1 .

AMA Style

Guido Camata, Francesca Celano, Maria Teresa De Risi, Paolo Franchin, Gennaro Magliulo, Vincenzo Manfredi, Angelo Masi, Fabrizio Mollaioli, Fabrizio Noto, Paolo Ricci, Enrico Spacone, Marco Terrenzi, Gerardo Verderame. RINTC PROJECT: NONLINEAR DYNAMIC ANALYSES OF ITALIAN CODE-CONFORMING REINFORCED CONCRETE BUILDINGS FOR RISK OF COLLAPSE ASSESSMENT. Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015). 2017; ():1.

Chicago/Turabian Style

Guido Camata; Francesca Celano; Maria Teresa De Risi; Paolo Franchin; Gennaro Magliulo; Vincenzo Manfredi; Angelo Masi; Fabrizio Mollaioli; Fabrizio Noto; Paolo Ricci; Enrico Spacone; Marco Terrenzi; Gerardo Verderame. 2017. "RINTC PROJECT: NONLINEAR DYNAMIC ANALYSES OF ITALIAN CODE-CONFORMING REINFORCED CONCRETE BUILDINGS FOR RISK OF COLLAPSE ASSESSMENT." Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015) , no. : 1.

Conference paper
Published: 01 January 2017 in Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015)
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Paolino Cassese; Maria Teresa De Risi; Gerardo Mario Verderame; Manolis Papadrakakis; M. Fragiadakis. SEISMIC BEHAVIOUR OF POORLY DETAILED RC BRIDGE PIERS WITH HOLLOW CROSS-SECTION. Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015) 2017, 1 .

AMA Style

Paolino Cassese, Maria Teresa De Risi, Gerardo Mario Verderame, Manolis Papadrakakis, M. Fragiadakis. SEISMIC BEHAVIOUR OF POORLY DETAILED RC BRIDGE PIERS WITH HOLLOW CROSS-SECTION. Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015). 2017; ():1.

Chicago/Turabian Style

Paolino Cassese; Maria Teresa De Risi; Gerardo Mario Verderame; Manolis Papadrakakis; M. Fragiadakis. 2017. "SEISMIC BEHAVIOUR OF POORLY DETAILED RC BRIDGE PIERS WITH HOLLOW CROSS-SECTION." Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015) , no. : 1.