Mauro Dolce | Università degli Studi di Napoli "Federico II" (original) (raw)
Papers by Mauro Dolce
Sommario Nel maggio 2012, una severa sequenza sismica ha colpito la parte centrale della Pianura ... more Sommario Nel maggio 2012, una severa sequenza sismica ha colpito la parte centrale della Pianura Padana, con due scosse principali di magnitudo locale 5.9 (20 maggio) e 5.8 (29 maggio) e con un'intensità mas-sima pari al VII-VIII grado della scala MCS. Le attività emergenziali, come di consueto, si sono svolte sotto il coordinamento del Dipartimento della Protezione Civile, nel quadro generale dato dalle compo-nenti e dalle strutture operative del Servizio Nazionale della Protezione Civile. Numerose attività tecni-che si sono affiancate al soccorso e all'assistenza alla popolazione, e hanno visto il diretto coinvolgi-mento del DPC. Tra queste si ricordano: l'acquisizione e la disseminazione dei dati della Rete Accele-rometrica Nazionale e dell'Osservatorio Sismico delle Strutture del DPC; l'approccio di protezione civile ai fenomeni di liquefazione; l'analisi del danno e le verifiche di agibilità; la regolamentazione delle veri-fiche delle strutture industria...
The approach to design of structures equipped with advanced passive seismic protection systems, l... more The approach to design of structures equipped with advanced passive seismic protection systems, like base isolation or energy dissipation systems, is discussed. Reference is made to the recent developments in the seismic European codes. A comparison is made among the European codes and the US Code IBC 2000 (ICC [1]), in order to evaluate the consistency of the approach to the problem. Moreover, the convenience in terms of design forces is verified, by comparing isolated and fixed structures forces, based on the Italian code. Finally, the applicability of the indications of the Italian seismic code to design structures equipped with EDBs is investigated.
1 Dep. of Structures, Geotechnics and Geology, University of Basilicata, Potenza, Italy. E-mail: ... more 1 Dep. of Structures, Geotechnics and Geology, University of Basilicata, Potenza, Italy. E-mail: dolce@unibas.it 2 Dep. of Structures, Geotechnics and Geology, University of Basilicata, Potenza, Italy. E-mail: cardone@disgg.unibas.it 3 Dep. of Structures, Geotechnics and Geology, University of Basilicata, Potenza, Italy. E-mail: nigro@disgg.unibas.it EXPERIMENTAL TESTS ON SEISMIC DEVICES BASED ON SHAPE MEMORY ALLOYS
Old masonry structures are often characterised by irregular or double layer masonry, with lack of... more Old masonry structures are often characterised by irregular or double layer masonry, with lack of transverse connections. Besides requiring in-plane strengthening, they also need improving transverse connections. The ideal strengthening strategy would therefore be realised by a threedimensional tying system. The CAM system, Masonry Active Ties or Manufact Active Confining (patented by Dolce and Marnetto), is based on such idea. Ties are made of stainless steel ribbons and are pre-tensioned, so that a light beneficial pre-compression state is applied to masonry. Using special connection elements, a continuous horizontal, vertical and transverse tie system is realised, that improves the shear and bending in-plane and out-of-plane strengths of single panels and entire walls. The main characteristics of CAM are illustrated in the paper, along with its application potential, the setting up operation, as well as the first experimental results on both panels and columns.
Seismic Structural Health Monitoring
This paper compiles and describes the national initiatives and projects on Seismic Structural Hea... more This paper compiles and describes the national initiatives and projects on Seismic Structural Health Monitoring (S2HM) active in a number of European countries. Sensors networks and typical layouts, data processing techniques and policies adopted for the management of alerts are described for the different national programs. The different policies adopted for the access to data are also described. Applications to buildings, bridges or cultural heritage constructions are used to describe in detail the seismic SHM systems installed in Italy, France, Greece and Portugal.
Recent Advances in Earthquake Engineering in Europe
On August 24 th , 2016, a severe, very long seismic sequence started in Central Italy. It was cha... more On August 24 th , 2016, a severe, very long seismic sequence started in Central Italy. It was characterized by nine major shocks M5+, two of which with moment magnitude Mw 6.0 (August 24 th , 2016) and 6.5 (October 30 th , 2016). A complex seismogenic fault system was activated, with the rupture of several segments. The affected area was very large, developing in NNW-SSE direction along the Apennines, due to both the large magnitude values and the distance among the epicenters of the nine major shocks. The maximum observed (cumulated) intensity was XI in both MCS and EMS scales. After one year, 78,500 seismic events had been recorded by the National Institute of Geophysics and Volcanology national seismic network. 299 people lost their life, all due to the first main shock. Devastating damage was experienced by buildings, cultural heritage, roads and other lifelines, resulting in huge economical direct losses. The emergency response was coordinated, according to the Law 225/1992, by the Italian National Department of Civil Protection. The main scientific features of the sequence and the main technical emergency activities are shown, discussed and, when possible, compared to the main recent Italian earthquakes, i.e., 1997 Umbria-Marche, the 2009 Abruzzo and 2012 Emilia earthquakes, pointing out analogies and differences.
Frontiers in Earth Science
Inundation maps are a fundamental tool for coastal risk management and in particular for designin... more Inundation maps are a fundamental tool for coastal risk management and in particular for designing evacuation maps and evacuation planning. These in turn are a necessary component of the tsunami warning systems’ last-mile. In Italy inundation maps are informed by a probabilistic tsunami hazard model. Based on a given level of acceptable risk, Italian authorities in charge for this task recommended to consider, as design hazard intensity, the average return period of 2500 years and the 84th percentile of the hazard model uncertainty. An available, regional-scale tsunami hazard model was used that covers the entire Italian coastline. Safety factors based on analysis of run-up variability and an empirical coastal dissipation law on a digital terrain model (DTM) were applied to convert the regional hazard into the design run-up and the corresponding evacuation maps with a GIS-based approach. Since the regional hazard cannot fully capture the local-scale variability, this simplified and ...
Bulletin of Earthquake Engineering
The last National Risk Assessment NRA for Italy was developed at the end of 2018 by the Departmen... more The last National Risk Assessment NRA for Italy was developed at the end of 2018 by the Department of Civil Protection (DPC) in response to the specific requirement of the Sendai Framework for Disaster Risk Reduction 2015–2030 to periodically adjourn the assessment of disaster risk. The methodology adopted to perform seismic risk assessment and build national seismic risk maps was specifically developed to comply with the recent Code for Civil Protection, issuing that, in addition to a solid scientific base, risk assessment should be characterized by a wide consensus of the scientific community. As a result, six research units belonging to two Centers of Competence of the DPC, namely ReLUIS (Network of university laboratories for seismic engineering) and EUCENTRE (European Centre for Training and Research in Earthquake Engineering), collaborated under the guidance and coordination of DPC to produce the recent updating of national seismic risk maps for the residential building stock....
Civil Protection (CP) organisations aim, in general, at safeguarding human life and health, goods... more Civil Protection (CP) organisations aim, in general, at safeguarding human life and health, goods, national heritage, human settlements and environment from all natural or man-made disasters. In order to achieve these objectives, for any concerned kind of risk, a comprehensive approach should deal with: - Forecasting and Warning - Prevention and Mitigation - Rescue and Assistance - Emergency overcoming CP
The effectiveness of different devices for bracing and isolation passive control systems has been... more The effectiveness of different devices for bracing and isolation passive control systems has been systematically verified within the MANSIDE (Memory Alloys for New Seismic Isolation DEvices) project, through a big experimental campaign on reduced scale R/C 3-story frame models. Seven frame models were built and tested on shaking table. The models were identical and designed according to Eurocode 8 (low ductility and low seismicity), but they were equipped with different protection systems and some of them were also completed with infill masonry panels. The experimental program was conceived to compare the seismic behaviour of structures without any passive control systems, with conventional control systems and with SMA-based control systems. Two frames were tested without any passive control systems, while the remaining five were equipped either with isolation devices or with special energy dissipating and/or re-centring bracing systems. The bracing systems were, alternatively, steel-based and SMA (Shape Memory Alloy)-based energy dissipating and/or re-centring braces. The isolation systems were, alternatively, rubber-based, steel-based, SMA-based, Hybrid SMA-steel-based systems. The tests were completed in March 1998. The awful amount of data resulting from such investigation has been carefully processed and interpreted, also exploiting the results of accurate numerical simulation analyses. In the paper a careful examination of the main results of the experimental investigation is proposed. The attention is focused on the comparison of the performances of the different protection systems, in order to evaluate their respective advantages and drawbacks in terms of mechanical behaviour of the structural systems under strong earthquakes.
Geotechnical, Geological, and Earthquake Engineering, 2009
... On October 31st and November 1st, 2002, two earthquakes of magnitude 5.4 and 5.3 hit the area... more ... On October 31st and November 1st, 2002, two earthquakes of magnitude 5.4 and 5.3 hit the area at the border between Molise ... moderate to severe, with some total collapses (including unfortunately the primary school) concentrated in a restricted area (Goretti and Dolce 2004). ...
Bulletin of Earthquake Engineering, 2015
ABSTRACT A comprehensive comparison among the three strongest earthquakes occurred in Italy in th... more ABSTRACT A comprehensive comparison among the three strongest earthquakes occurred in Italy in the past 30 years is presented. These three earthquakes struck the regions of Umbria and Marche in 1997, Abruzzo in 2009, and Emilia-Romagna, Lombardia and Veneto in 2012, respectively. They were assigned exactly the same local magnitude, Ml5.9, and comparable focal depths. In spite of having occurred in the same country, these earthquakes displayed considerable differences from both the scientific and the civil protection points of view. Differences can be ascribed to the released energy, the seismotectonic and geomorphological features, as well as the diverse population density, building features and socio-economic conditions that characterize the three epicentral areas. Nevertheless, the overall economic losses come out to be almost the same, although deriving from quite diverse distributions among the different categories of costs. Differences and similarities among the three events are carefully analysed and discussed in the paper.
Geotechnical, Geological, and Earthquake Engineering, 2010
... Fig. 19.13 Aerial view of one settlement of the Project CASE (Bazzano) on October 29, 2009. T... more ... Fig. 19.13 Aerial view of one settlement of the Project CASE (Bazzano) on October 29, 2009. Twenty-one buildings are all completed and inhabited by about 1,600 people Page 18. 480 M.Dolce Fig. 19.14 External view of a building in the settlement of Cese di Preturo ...
Bulletin of Earthquake Engineering, 2015
ABSTRACT
Soil Dynamics and Earthquake Engineering, 2003
A three-stories, base-isolated building located in Rapolla (Potenza, Italy) was tested with a sna... more A three-stories, base-isolated building located in Rapolla (Potenza, Italy) was tested with a snap-back experiment. Free-field measures were performed using 3D seismometers, located at 10 and 50m from the buildings in direction of motion and at 10m from the building in direction transverse to the motion. At each measurement point it was possible to separate the soil amplification effects from
Journal of Earthquake Engineering, 2006
Journal of Earthquake Engineering, 2003
Sommario Nel maggio 2012, una severa sequenza sismica ha colpito la parte centrale della Pianura ... more Sommario Nel maggio 2012, una severa sequenza sismica ha colpito la parte centrale della Pianura Padana, con due scosse principali di magnitudo locale 5.9 (20 maggio) e 5.8 (29 maggio) e con un'intensità mas-sima pari al VII-VIII grado della scala MCS. Le attività emergenziali, come di consueto, si sono svolte sotto il coordinamento del Dipartimento della Protezione Civile, nel quadro generale dato dalle compo-nenti e dalle strutture operative del Servizio Nazionale della Protezione Civile. Numerose attività tecni-che si sono affiancate al soccorso e all'assistenza alla popolazione, e hanno visto il diretto coinvolgi-mento del DPC. Tra queste si ricordano: l'acquisizione e la disseminazione dei dati della Rete Accele-rometrica Nazionale e dell'Osservatorio Sismico delle Strutture del DPC; l'approccio di protezione civile ai fenomeni di liquefazione; l'analisi del danno e le verifiche di agibilità; la regolamentazione delle veri-fiche delle strutture industria...
The approach to design of structures equipped with advanced passive seismic protection systems, l... more The approach to design of structures equipped with advanced passive seismic protection systems, like base isolation or energy dissipation systems, is discussed. Reference is made to the recent developments in the seismic European codes. A comparison is made among the European codes and the US Code IBC 2000 (ICC [1]), in order to evaluate the consistency of the approach to the problem. Moreover, the convenience in terms of design forces is verified, by comparing isolated and fixed structures forces, based on the Italian code. Finally, the applicability of the indications of the Italian seismic code to design structures equipped with EDBs is investigated.
1 Dep. of Structures, Geotechnics and Geology, University of Basilicata, Potenza, Italy. E-mail: ... more 1 Dep. of Structures, Geotechnics and Geology, University of Basilicata, Potenza, Italy. E-mail: dolce@unibas.it 2 Dep. of Structures, Geotechnics and Geology, University of Basilicata, Potenza, Italy. E-mail: cardone@disgg.unibas.it 3 Dep. of Structures, Geotechnics and Geology, University of Basilicata, Potenza, Italy. E-mail: nigro@disgg.unibas.it EXPERIMENTAL TESTS ON SEISMIC DEVICES BASED ON SHAPE MEMORY ALLOYS
Old masonry structures are often characterised by irregular or double layer masonry, with lack of... more Old masonry structures are often characterised by irregular or double layer masonry, with lack of transverse connections. Besides requiring in-plane strengthening, they also need improving transverse connections. The ideal strengthening strategy would therefore be realised by a threedimensional tying system. The CAM system, Masonry Active Ties or Manufact Active Confining (patented by Dolce and Marnetto), is based on such idea. Ties are made of stainless steel ribbons and are pre-tensioned, so that a light beneficial pre-compression state is applied to masonry. Using special connection elements, a continuous horizontal, vertical and transverse tie system is realised, that improves the shear and bending in-plane and out-of-plane strengths of single panels and entire walls. The main characteristics of CAM are illustrated in the paper, along with its application potential, the setting up operation, as well as the first experimental results on both panels and columns.
Seismic Structural Health Monitoring
This paper compiles and describes the national initiatives and projects on Seismic Structural Hea... more This paper compiles and describes the national initiatives and projects on Seismic Structural Health Monitoring (S2HM) active in a number of European countries. Sensors networks and typical layouts, data processing techniques and policies adopted for the management of alerts are described for the different national programs. The different policies adopted for the access to data are also described. Applications to buildings, bridges or cultural heritage constructions are used to describe in detail the seismic SHM systems installed in Italy, France, Greece and Portugal.
Recent Advances in Earthquake Engineering in Europe
On August 24 th , 2016, a severe, very long seismic sequence started in Central Italy. It was cha... more On August 24 th , 2016, a severe, very long seismic sequence started in Central Italy. It was characterized by nine major shocks M5+, two of which with moment magnitude Mw 6.0 (August 24 th , 2016) and 6.5 (October 30 th , 2016). A complex seismogenic fault system was activated, with the rupture of several segments. The affected area was very large, developing in NNW-SSE direction along the Apennines, due to both the large magnitude values and the distance among the epicenters of the nine major shocks. The maximum observed (cumulated) intensity was XI in both MCS and EMS scales. After one year, 78,500 seismic events had been recorded by the National Institute of Geophysics and Volcanology national seismic network. 299 people lost their life, all due to the first main shock. Devastating damage was experienced by buildings, cultural heritage, roads and other lifelines, resulting in huge economical direct losses. The emergency response was coordinated, according to the Law 225/1992, by the Italian National Department of Civil Protection. The main scientific features of the sequence and the main technical emergency activities are shown, discussed and, when possible, compared to the main recent Italian earthquakes, i.e., 1997 Umbria-Marche, the 2009 Abruzzo and 2012 Emilia earthquakes, pointing out analogies and differences.
Frontiers in Earth Science
Inundation maps are a fundamental tool for coastal risk management and in particular for designin... more Inundation maps are a fundamental tool for coastal risk management and in particular for designing evacuation maps and evacuation planning. These in turn are a necessary component of the tsunami warning systems’ last-mile. In Italy inundation maps are informed by a probabilistic tsunami hazard model. Based on a given level of acceptable risk, Italian authorities in charge for this task recommended to consider, as design hazard intensity, the average return period of 2500 years and the 84th percentile of the hazard model uncertainty. An available, regional-scale tsunami hazard model was used that covers the entire Italian coastline. Safety factors based on analysis of run-up variability and an empirical coastal dissipation law on a digital terrain model (DTM) were applied to convert the regional hazard into the design run-up and the corresponding evacuation maps with a GIS-based approach. Since the regional hazard cannot fully capture the local-scale variability, this simplified and ...
Bulletin of Earthquake Engineering
The last National Risk Assessment NRA for Italy was developed at the end of 2018 by the Departmen... more The last National Risk Assessment NRA for Italy was developed at the end of 2018 by the Department of Civil Protection (DPC) in response to the specific requirement of the Sendai Framework for Disaster Risk Reduction 2015–2030 to periodically adjourn the assessment of disaster risk. The methodology adopted to perform seismic risk assessment and build national seismic risk maps was specifically developed to comply with the recent Code for Civil Protection, issuing that, in addition to a solid scientific base, risk assessment should be characterized by a wide consensus of the scientific community. As a result, six research units belonging to two Centers of Competence of the DPC, namely ReLUIS (Network of university laboratories for seismic engineering) and EUCENTRE (European Centre for Training and Research in Earthquake Engineering), collaborated under the guidance and coordination of DPC to produce the recent updating of national seismic risk maps for the residential building stock....
Civil Protection (CP) organisations aim, in general, at safeguarding human life and health, goods... more Civil Protection (CP) organisations aim, in general, at safeguarding human life and health, goods, national heritage, human settlements and environment from all natural or man-made disasters. In order to achieve these objectives, for any concerned kind of risk, a comprehensive approach should deal with: - Forecasting and Warning - Prevention and Mitigation - Rescue and Assistance - Emergency overcoming CP
The effectiveness of different devices for bracing and isolation passive control systems has been... more The effectiveness of different devices for bracing and isolation passive control systems has been systematically verified within the MANSIDE (Memory Alloys for New Seismic Isolation DEvices) project, through a big experimental campaign on reduced scale R/C 3-story frame models. Seven frame models were built and tested on shaking table. The models were identical and designed according to Eurocode 8 (low ductility and low seismicity), but they were equipped with different protection systems and some of them were also completed with infill masonry panels. The experimental program was conceived to compare the seismic behaviour of structures without any passive control systems, with conventional control systems and with SMA-based control systems. Two frames were tested without any passive control systems, while the remaining five were equipped either with isolation devices or with special energy dissipating and/or re-centring bracing systems. The bracing systems were, alternatively, steel-based and SMA (Shape Memory Alloy)-based energy dissipating and/or re-centring braces. The isolation systems were, alternatively, rubber-based, steel-based, SMA-based, Hybrid SMA-steel-based systems. The tests were completed in March 1998. The awful amount of data resulting from such investigation has been carefully processed and interpreted, also exploiting the results of accurate numerical simulation analyses. In the paper a careful examination of the main results of the experimental investigation is proposed. The attention is focused on the comparison of the performances of the different protection systems, in order to evaluate their respective advantages and drawbacks in terms of mechanical behaviour of the structural systems under strong earthquakes.
Geotechnical, Geological, and Earthquake Engineering, 2009
... On October 31st and November 1st, 2002, two earthquakes of magnitude 5.4 and 5.3 hit the area... more ... On October 31st and November 1st, 2002, two earthquakes of magnitude 5.4 and 5.3 hit the area at the border between Molise ... moderate to severe, with some total collapses (including unfortunately the primary school) concentrated in a restricted area (Goretti and Dolce 2004). ...
Bulletin of Earthquake Engineering, 2015
ABSTRACT A comprehensive comparison among the three strongest earthquakes occurred in Italy in th... more ABSTRACT A comprehensive comparison among the three strongest earthquakes occurred in Italy in the past 30 years is presented. These three earthquakes struck the regions of Umbria and Marche in 1997, Abruzzo in 2009, and Emilia-Romagna, Lombardia and Veneto in 2012, respectively. They were assigned exactly the same local magnitude, Ml5.9, and comparable focal depths. In spite of having occurred in the same country, these earthquakes displayed considerable differences from both the scientific and the civil protection points of view. Differences can be ascribed to the released energy, the seismotectonic and geomorphological features, as well as the diverse population density, building features and socio-economic conditions that characterize the three epicentral areas. Nevertheless, the overall economic losses come out to be almost the same, although deriving from quite diverse distributions among the different categories of costs. Differences and similarities among the three events are carefully analysed and discussed in the paper.
Geotechnical, Geological, and Earthquake Engineering, 2010
... Fig. 19.13 Aerial view of one settlement of the Project CASE (Bazzano) on October 29, 2009. T... more ... Fig. 19.13 Aerial view of one settlement of the Project CASE (Bazzano) on October 29, 2009. Twenty-one buildings are all completed and inhabited by about 1,600 people Page 18. 480 M.Dolce Fig. 19.14 External view of a building in the settlement of Cese di Preturo ...
Bulletin of Earthquake Engineering, 2015
ABSTRACT
Soil Dynamics and Earthquake Engineering, 2003
A three-stories, base-isolated building located in Rapolla (Potenza, Italy) was tested with a sna... more A three-stories, base-isolated building located in Rapolla (Potenza, Italy) was tested with a snap-back experiment. Free-field measures were performed using 3D seismometers, located at 10 and 50m from the buildings in direction of motion and at 10m from the building in direction transverse to the motion. At each measurement point it was possible to separate the soil amplification effects from
Journal of Earthquake Engineering, 2006
Journal of Earthquake Engineering, 2003