Irene Rocca - Academia.edu (original) (raw)
Papers by Irene Rocca
Il caso studio del restauro della facciata della chiesa di Santa Maria di Nazareth (meglio conosc... more Il caso studio del restauro della facciata della chiesa di Santa Maria di Nazareth (meglio conosciuto come chiesa degli Scalzi) a Venezia rappresenta un\u2019innovativa e fruttuosa collaborazione interdisci-plinare. Essendo posta all\u2019ingresso della citt\ue0 lagunare, la chiesa gi\ue0 da fine Ottocento rappresenta un landmark segnando in maniera decisa la facies urbana della citt\ue0 di Venezia. La facciata barocca, realizzata sul progetto di Giuseppe Sardi tra il 1672 e il 1680, rappresenta un unicum a Venezia in quanto interamente realizzata in marmo di Carrara, un calcare a struttura saccaroide che si \ue8 dimostra-to nei secoli inadatto all\u2019aggressivo clima lagunare. Nel corso dei secoli sono stati necessari diversi interventi di restauro, l\u2019ultimo dei quali tra il 2014 e fine 2018 a seguito della caduta di una foglia d\u2019acanto di un capitello nell\u2019estate 2013. Le indagini diagnostiche hanno portato alla luce un vasto e inaspettato fenomeno degenerativo ch...
Studio di vulnerabilita sismica di Corte Nuova, Palazzo Ducale Mantova.Bene tutelato che quindi a... more Studio di vulnerabilita sismica di Corte Nuova, Palazzo Ducale Mantova.Bene tutelato che quindi analisi secondo Direttiva 9/2/2011.Dopo le indagini richieste dalla fas di conoscenza,si e svolta l'analisi LV1 globale(non verificate tutte le configurazioni),si e poi passati alla LV2 tramite verifica di meccanismi di collasso,ribaltamenti e flessioni verticali,con presenza di FC per pesare il livello di conoscenza.Infine modellazione a shell globale e finalizzata a trovare cause lesione parete.
XI International Conference on Structural Dynamics, 2020
a 63-year-old female patient was admitted to the hospital for an in-depth diagnosis of accidental... more a 63-year-old female patient was admitted to the hospital for an in-depth diagnosis of accidentally found pancreatic cystic lesion. The lesion was detected by computed tomography scan and magnetic resonance imaging of the abdomen and identified as potentially malignant mucinous cystic neoplasm (MCn). endoscopic ultrasound-guided fine-needle aspiration biopsy with the analysis of the fluid from the cyst was performed as well and it confirmed the malignancy of the cystic lesion. The patient was qualified for surgery and the final diagnosis based on histopathological examination of the surgical material confirmed MCn with the accompanying invasive pancreatic adenocarcinoma.
italianoL’articolo tratta il tema della caratterizzazione dell’azione sismica nelle analisi di vu... more italianoL’articolo tratta il tema della caratterizzazione dell’azione sismica nelle analisi di vulnerabilita di edifici/opere appartenenti al Patrimonio Culturale. Dopo un’introduzione sulla definizione di azione sismica, sia in termini di spettro di risposta che di storie temporali di accelerazioni, velocita e spostamenti, viene ribadita la necessita dello studio della sismicita storica del sito ove e collocata l’opera e di definire con criteri e metodi adeguati le azioni da utilizzare nelle verifiche, con riferimento alla normativa italiana ed europea. A titolo di esempio si riportano alcune riflessioni sul sisma avvenuto nel 2012 in Emilia, che ha consentito di approfondire tali tematiche. In particolare viene presentato il caso del busto di Francesco I d’Este, situato presso la Galleria Estense di Modena. Si tratta di un caso studio di particolare interesse che ha comportato sia uno studio approfondito della storia sismica del sito (cfr. cap. 3) sia la valutazione dell’amplifica...
Applied Sciences, 2021
The seismic safety of existing building stock has become a very critical issue in recent years, m... more The seismic safety of existing building stock has become a very critical issue in recent years, mainly in earthquake-prone South Europe where most of the buildings were designed before the enforcement of seismic standards. Therefore, the concept, development and testing of efficient and cost-effective seismic retrofitting technologies are nowadays strongly needed, both for the society and for the scientific community. This study deals with the seismic assessment of a new RC-framed skin for retrofit intervention of existing buildings, evaluated through nonlinear static (pushover) analyses. A preliminary description of the proposed technology is provided, then numerical modeling of a typical RC existing building before and after retrofitting intervention is performed within the OpenSees framework. The results revealed that the proposed retrofitting technology improves the seismic performance of the RC building, also modifying the failure mode from a brittle soft-story mechanism to a m...
Engineering Structures, 2020
The seismic performances of non-structural (NS) components belonging to the category of "valuable... more The seismic performances of non-structural (NS) components belonging to the category of "valuable elements", i.e. elements characterized by high value in terms of economic, cultural or strategic purposes, represent nowadays a crucial aspect in seismic safety design and assessment of new and existing buildings. Actually, most valuable NS elements are simply-supported objects, which can be classified as acceleration-sensitive NS elements. Frequently, these elements can be considered dynamically uncoupled from the primary structure to which they are connected, thereby justifying the Floor Response Spectrum methods usually adopted in literature and by most of building codes. This paper presents an extensive parametric study of floor response spectra obtained by linear and nonlinear numerical modeling of RC structures. Two sets of 30 horizontal ground motion scaled acceleration records are generated according to the Ultimate Limit State (ULS) and the Damage Limitation State (DLS) spectra adopted for building design. The numerical floor response spectra and those proposed by codes and international standards are critically compared, and the Peak Floor Acceleration (PFA) and the Peak Floor Velocity (PFV) profiles along the building height are discussed. Finally, a simplified method based on the "stability charts" is developed to assess the seismic safety of free standing NS elements located at the upper floors of the host buildings. less intense earthquakes [1-4]. Finally, for many buildings NS elements, including building contents, constitute a considerable amount (70-80 percent) of the total construction value [5]. Consequently, in many past earthquakes losses derived from the damage of NS elements exceeded losses related to structural damage. This issue becomes even more crucial if we consider that significant non-structural damage can also occur at low seismic intensity levels, for which structural elements are expected to remain in their elastic domain. These observations make clear that the seismic performances of NS
Engineering Structures, 2020
The seismic performances of non-structural (NS) components belonging to the category of "valuable... more The seismic performances of non-structural (NS) components belonging to the category of "valuable elements", i.e. elements characterized by high value in terms of economic, cultural or strategic purposes, represent nowadays a crucial aspect in seismic safety design and assessment of new and existing buildings. Actually, most valuable NS elements are simply-supported objects, which can be classified as acceleration-sensitive NS elements. Frequently, these elements can be considered dynamically uncoupled from the primary structure to which they are connected, thereby justifying the Floor Response Spectrum methods usually adopted in literature and by most of building codes. This paper presents an extensive parametric study of floor response spectra obtained by linear and nonlinear numerical modeling of RC structures. Two sets of 30 horizontal ground motion scaled acceleration records are generated according to the Ultimate Limit State (ULS) and the Damage Limitation State (DLS) spectra adopted for building design. The numerical floor response spectra and those proposed by codes and international standards are critically compared, and the Peak Floor Acceleration (PFA) and the Peak Floor Velocity (PFV) profiles along the building height are discussed. Finally, a simplified method based on the "stability charts" is developed to assess the seismic safety of free standing NS elements located at the upper floors of the host buildings. less intense earthquakes [1-4]. Finally, for many buildings NS elements, including building contents, constitute a considerable amount (70-80 percent) of the total construction value [5]. Consequently, in many past earthquakes losses derived from the damage of NS elements exceeded losses related to structural damage. This issue becomes even more crucial if we consider that significant non-structural damage can also occur at low seismic intensity levels, for which structural elements are expected to remain in their elastic domain. These observations make clear that the seismic performances of NS
Engineering Structures, 2018
![Research paper thumbnail of Authors’ reply to Discussion on “Vulnerability assessment methods for rocking and overturning of free standing elements” by Luisa Berto, Irene Rocca, Anna Saeta [Soil Dyn Earthq Eng 110 (2018), 121–136]](https://attachments.academia-assets.com/87732280/thumbnails/1.jpg)
](Soil Dynamics and Earthquake Engineering, 2018
Soil Dynamics and Earthquake Engineering, 2018
This paper presents a comparison between different methods for assessing the probability of rocki... more This paper presents a comparison between different methods for assessing the probability of rocking and overturning of free standing elements, under the action of ground motions of given intensities. The classical Ishiyama criterion is considered and compared with both kinematic linear and non linear analyses recommended by the Italian Standard (i.e. KL and KNL respectively) and with the displacement based approach proposed by Lam-Gad. The main differences among these methods are highlighted and validated on the basis of experimental tests available in literature, by using real seismic records. Then, the different stability criteria are used to obtain overturning stability charts, based on conventional spectra assumed by Eurocode 8 and some considerations concerning the applicability conditions of each method are given.
Il caso studio del restauro della facciata della chiesa di Santa Maria di Nazareth (meglio conosc... more Il caso studio del restauro della facciata della chiesa di Santa Maria di Nazareth (meglio conosciuto come chiesa degli Scalzi) a Venezia rappresenta un\u2019innovativa e fruttuosa collaborazione interdisci-plinare. Essendo posta all\u2019ingresso della citt\ue0 lagunare, la chiesa gi\ue0 da fine Ottocento rappresenta un landmark segnando in maniera decisa la facies urbana della citt\ue0 di Venezia. La facciata barocca, realizzata sul progetto di Giuseppe Sardi tra il 1672 e il 1680, rappresenta un unicum a Venezia in quanto interamente realizzata in marmo di Carrara, un calcare a struttura saccaroide che si \ue8 dimostra-to nei secoli inadatto all\u2019aggressivo clima lagunare. Nel corso dei secoli sono stati necessari diversi interventi di restauro, l\u2019ultimo dei quali tra il 2014 e fine 2018 a seguito della caduta di una foglia d\u2019acanto di un capitello nell\u2019estate 2013. Le indagini diagnostiche hanno portato alla luce un vasto e inaspettato fenomeno degenerativo ch...
Studio di vulnerabilita sismica di Corte Nuova, Palazzo Ducale Mantova.Bene tutelato che quindi a... more Studio di vulnerabilita sismica di Corte Nuova, Palazzo Ducale Mantova.Bene tutelato che quindi analisi secondo Direttiva 9/2/2011.Dopo le indagini richieste dalla fas di conoscenza,si e svolta l'analisi LV1 globale(non verificate tutte le configurazioni),si e poi passati alla LV2 tramite verifica di meccanismi di collasso,ribaltamenti e flessioni verticali,con presenza di FC per pesare il livello di conoscenza.Infine modellazione a shell globale e finalizzata a trovare cause lesione parete.
XI International Conference on Structural Dynamics, 2020
a 63-year-old female patient was admitted to the hospital for an in-depth diagnosis of accidental... more a 63-year-old female patient was admitted to the hospital for an in-depth diagnosis of accidentally found pancreatic cystic lesion. The lesion was detected by computed tomography scan and magnetic resonance imaging of the abdomen and identified as potentially malignant mucinous cystic neoplasm (MCn). endoscopic ultrasound-guided fine-needle aspiration biopsy with the analysis of the fluid from the cyst was performed as well and it confirmed the malignancy of the cystic lesion. The patient was qualified for surgery and the final diagnosis based on histopathological examination of the surgical material confirmed MCn with the accompanying invasive pancreatic adenocarcinoma.
italianoL’articolo tratta il tema della caratterizzazione dell’azione sismica nelle analisi di vu... more italianoL’articolo tratta il tema della caratterizzazione dell’azione sismica nelle analisi di vulnerabilita di edifici/opere appartenenti al Patrimonio Culturale. Dopo un’introduzione sulla definizione di azione sismica, sia in termini di spettro di risposta che di storie temporali di accelerazioni, velocita e spostamenti, viene ribadita la necessita dello studio della sismicita storica del sito ove e collocata l’opera e di definire con criteri e metodi adeguati le azioni da utilizzare nelle verifiche, con riferimento alla normativa italiana ed europea. A titolo di esempio si riportano alcune riflessioni sul sisma avvenuto nel 2012 in Emilia, che ha consentito di approfondire tali tematiche. In particolare viene presentato il caso del busto di Francesco I d’Este, situato presso la Galleria Estense di Modena. Si tratta di un caso studio di particolare interesse che ha comportato sia uno studio approfondito della storia sismica del sito (cfr. cap. 3) sia la valutazione dell’amplifica...
Applied Sciences, 2021
The seismic safety of existing building stock has become a very critical issue in recent years, m... more The seismic safety of existing building stock has become a very critical issue in recent years, mainly in earthquake-prone South Europe where most of the buildings were designed before the enforcement of seismic standards. Therefore, the concept, development and testing of efficient and cost-effective seismic retrofitting technologies are nowadays strongly needed, both for the society and for the scientific community. This study deals with the seismic assessment of a new RC-framed skin for retrofit intervention of existing buildings, evaluated through nonlinear static (pushover) analyses. A preliminary description of the proposed technology is provided, then numerical modeling of a typical RC existing building before and after retrofitting intervention is performed within the OpenSees framework. The results revealed that the proposed retrofitting technology improves the seismic performance of the RC building, also modifying the failure mode from a brittle soft-story mechanism to a m...
Engineering Structures, 2020
The seismic performances of non-structural (NS) components belonging to the category of "valuable... more The seismic performances of non-structural (NS) components belonging to the category of "valuable elements", i.e. elements characterized by high value in terms of economic, cultural or strategic purposes, represent nowadays a crucial aspect in seismic safety design and assessment of new and existing buildings. Actually, most valuable NS elements are simply-supported objects, which can be classified as acceleration-sensitive NS elements. Frequently, these elements can be considered dynamically uncoupled from the primary structure to which they are connected, thereby justifying the Floor Response Spectrum methods usually adopted in literature and by most of building codes. This paper presents an extensive parametric study of floor response spectra obtained by linear and nonlinear numerical modeling of RC structures. Two sets of 30 horizontal ground motion scaled acceleration records are generated according to the Ultimate Limit State (ULS) and the Damage Limitation State (DLS) spectra adopted for building design. The numerical floor response spectra and those proposed by codes and international standards are critically compared, and the Peak Floor Acceleration (PFA) and the Peak Floor Velocity (PFV) profiles along the building height are discussed. Finally, a simplified method based on the "stability charts" is developed to assess the seismic safety of free standing NS elements located at the upper floors of the host buildings. less intense earthquakes [1-4]. Finally, for many buildings NS elements, including building contents, constitute a considerable amount (70-80 percent) of the total construction value [5]. Consequently, in many past earthquakes losses derived from the damage of NS elements exceeded losses related to structural damage. This issue becomes even more crucial if we consider that significant non-structural damage can also occur at low seismic intensity levels, for which structural elements are expected to remain in their elastic domain. These observations make clear that the seismic performances of NS
Engineering Structures, 2020
The seismic performances of non-structural (NS) components belonging to the category of "valuable... more The seismic performances of non-structural (NS) components belonging to the category of "valuable elements", i.e. elements characterized by high value in terms of economic, cultural or strategic purposes, represent nowadays a crucial aspect in seismic safety design and assessment of new and existing buildings. Actually, most valuable NS elements are simply-supported objects, which can be classified as acceleration-sensitive NS elements. Frequently, these elements can be considered dynamically uncoupled from the primary structure to which they are connected, thereby justifying the Floor Response Spectrum methods usually adopted in literature and by most of building codes. This paper presents an extensive parametric study of floor response spectra obtained by linear and nonlinear numerical modeling of RC structures. Two sets of 30 horizontal ground motion scaled acceleration records are generated according to the Ultimate Limit State (ULS) and the Damage Limitation State (DLS) spectra adopted for building design. The numerical floor response spectra and those proposed by codes and international standards are critically compared, and the Peak Floor Acceleration (PFA) and the Peak Floor Velocity (PFV) profiles along the building height are discussed. Finally, a simplified method based on the "stability charts" is developed to assess the seismic safety of free standing NS elements located at the upper floors of the host buildings. less intense earthquakes [1-4]. Finally, for many buildings NS elements, including building contents, constitute a considerable amount (70-80 percent) of the total construction value [5]. Consequently, in many past earthquakes losses derived from the damage of NS elements exceeded losses related to structural damage. This issue becomes even more crucial if we consider that significant non-structural damage can also occur at low seismic intensity levels, for which structural elements are expected to remain in their elastic domain. These observations make clear that the seismic performances of NS
Engineering Structures, 2018
Soil Dynamics and Earthquake Engineering, 2018
Soil Dynamics and Earthquake Engineering, 2018
This paper presents a comparison between different methods for assessing the probability of rocki... more This paper presents a comparison between different methods for assessing the probability of rocking and overturning of free standing elements, under the action of ground motions of given intensities. The classical Ishiyama criterion is considered and compared with both kinematic linear and non linear analyses recommended by the Italian Standard (i.e. KL and KNL respectively) and with the displacement based approach proposed by Lam-Gad. The main differences among these methods are highlighted and validated on the basis of experimental tests available in literature, by using real seismic records. Then, the different stability criteria are used to obtain overturning stability charts, based on conventional spectra assumed by Eurocode 8 and some considerations concerning the applicability conditions of each method are given.