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The Caronia area is located in the Tyrrhenian north-eastern sector of Sicily (Italy). Starting in 2010, attention focused on the study of landslides phenomena that occurred in this area, which caused significant economic damage to buildings and infrastructures and loss of productive activities. The site is characterized by geotechnical, geological and morphological heterogeneity, and for this reason the site is particularly prone to seismic topographic amplification effects. In this paper, the authors carried out numerical studies focused on the topographic seismic effect evaluation concerning the slope affected by the landslide phenomena. For this site, geotechnical characterization was available concerning both in-situ and laboratory tests; boreholes, piezometers, down-hole tests, multichannel analysis of surface waves tests, seismic tomographies and inclinometer measurements were carried out. Furthermore, 1-D and 2-D local seismic response analyses were carried out by using different synthetic seismograms related to the earthquake of Messina and Reggio Calabria on 28 December 1908. The results of the numerical analyses are presented in terms of response seismograms and response spectra at the surface.
Antonio Cavallaro; Antonio Ferraro; Salvatore Grasso; Antonio Puccia. 2-D Seismic Response Analysis of a Slope in the Tyrrhenian Area (Italy). Applied Sciences 2021, 11, 3180 .
AMA StyleAntonio Cavallaro, Antonio Ferraro, Salvatore Grasso, Antonio Puccia. 2-D Seismic Response Analysis of a Slope in the Tyrrhenian Area (Italy). Applied Sciences. 2021; 11 (7):3180.
Chicago/Turabian StyleAntonio Cavallaro; Antonio Ferraro; Salvatore Grasso; Antonio Puccia. 2021. "2-D Seismic Response Analysis of a Slope in the Tyrrhenian Area (Italy)." Applied Sciences 11, no. 7: 3180.
The complex cyclic shear stress path experienced by the soil during an earthquake, which could also induce liquefaction phenomena, can be approximated in the laboratory only by using sophisticated testing apparatuses. Cyclic triaxial tests have been widely used, especially for coarse grained soils, as in this study. In the framework of the design for the seismic retrofitting of the ‘‘Ritiro viaduct’’ foundations along the A20 motorway connecting Messina with Palermo (Italy), a soil liquefaction study was also carried out. With this aim, a detailed geological and geotechnical characterization of the area was performed by in situ and laboratory tests, including seismic dilatometer Marchetti tests (SDMTs), the combined resonant column (RCT) and cyclic loading torsional shear tests (CLTSTs), and undrained cyclic loading triaxial tests (CLTxTs). In particular, the paper presents the results of cyclic triaxial tests carried out on isotropically consolidated specimens of a sandy soil. The seismic retrofitting works include the reinforcement of the foundation and replacement of the decks with newly designed type and structural schemes, mixed steel, and concrete with continuous girder. During the investigation, data were acquired for the characterization of materials, for the definition of degradation phenomena with the relative identification of possible causes, and for the estimation of the residual performance characteristics of the building. The structural campaign of investigations necessary to determine all of the key parameters useful for a correct definition of the residual performance capabilities of the work was divided into two phases: One in situ and one in the laboratory.
Francesco Castelli; Antonio Cavallaro; Salvatore Grasso; Valentina Lentini. Undrained Cyclic Laboratory Behavior of Sandy Soils. Geosciences 2019, 9, 512 .
AMA StyleFrancesco Castelli, Antonio Cavallaro, Salvatore Grasso, Valentina Lentini. Undrained Cyclic Laboratory Behavior of Sandy Soils. Geosciences. 2019; 9 (12):512.
Chicago/Turabian StyleFrancesco Castelli; Antonio Cavallaro; Salvatore Grasso; Valentina Lentini. 2019. "Undrained Cyclic Laboratory Behavior of Sandy Soils." Geosciences 9, no. 12: 512.
To investigate the geotechnical soil properties of Emilia Romagna Region, a large series of in situ tests, laboratory tests and geophysical tests have been performed, particularly at the damaged city of Scortichino—Bondeno. Deep site investigations have been undertaken for the site characterization of the soil also along the Burana-Scortichino levee. Borings, Piezocone tests (CPTU) and dynamic in situ tests have been performed. Among them, Multichannel Analysis of Surface Waves test (MASW) and Seismic Dilatometer Marchetti Tests (SDMT) have been also carried out, with the aim to evaluate the soil profile of shear wave velocity (Vs). Resonant Column Tests (RCT) were also performed in laboratory on reconstituted solid cylindrical specimens. The Seismic Dilatometer Marchetti Tests were performed up to a depth of 32 m. The results show a very detailed and stable shear wave profile. The shear wave profiles obtained by SDMT have been compared with other laboratory tests. A comparison between the in situ small shear strain, laboratory shear strain and shear strain obtained by empirical correlations, was also performed. Finally, using the results of SDMT tests, soil liquefaction phenomena have been analyzed with a new procedure based on SDMT, using the soil properties obtained by field and laboratory tests.
Antonio Cavallaro; Piera Paola Capilleri; Salvatore Grasso. Site Characterization by Dynamic In Situ and Laboratory Tests for Liquefaction Potential Evaluation during Emilia Romagna Earthquake. Geosciences 2018, 8, 242 .
AMA StyleAntonio Cavallaro, Piera Paola Capilleri, Salvatore Grasso. Site Characterization by Dynamic In Situ and Laboratory Tests for Liquefaction Potential Evaluation during Emilia Romagna Earthquake. Geosciences. 2018; 8 (7):242.
Chicago/Turabian StyleAntonio Cavallaro; Piera Paola Capilleri; Salvatore Grasso. 2018. "Site Characterization by Dynamic In Situ and Laboratory Tests for Liquefaction Potential Evaluation during Emilia Romagna Earthquake." Geosciences 8, no. 7: 242.
A dynamic characterisation for the test site of Regional Civil Defence Department in the city of Messina, Italy, has been carried out with the aim of forecasting the distribution of seismic geotechnical hazard within the city. These results can be used by the Civil Defence Department and by other services for disaster planning management. On December 28, 1908 at 5:20 a.m. local time, a devastating earthquake occurred along the Strait of Messina between eastern tip of Sicily and the western tip of Calabria in the south of Italy. The Messina Earthquake, also known as the Messina-Reggio Calabria Earthquake, caused severe ground shaking throughout the regions and triggered also a local tsunami. The dataset clearly points out the vulnerability of the physical environment to the occurrence of 1908 Messina like-earthquakes (and associated tsunamis). The identification and characterization of the most vulnerable sites nowadays exposed to the occurrence of earthquake environmental effects is essential in the seismic risk assessment of the Messina area. Within this aim field and laboratory experimental data allowed the definition of a geotechnical model of the subsoil in the city of Messina. For the site characterisation of soils deep site investigations have been undertaken. Borings and dynamic in situ tests have been performed. Among them Down-Hole (D-H) and Seismic Dilatometer Marchetti Tests (SDMT) have been carried out, also with the aim to evaluate the soil profile of shear wave velocity (Vs). Undisturbed samples were retrieved from boreholes for static and dynamic characterisation through laboratory tests.
Francesco Castelli; Antonio Cavallaro; Antonio Ferraro; Salvatore Grasso; Valentina Lentini; Maria Rossella Massimino. Dynamic characterisation of a test site in Messina (Italy). Annals of Geophysics 2018, 61, 222 .
AMA StyleFrancesco Castelli, Antonio Cavallaro, Antonio Ferraro, Salvatore Grasso, Valentina Lentini, Maria Rossella Massimino. Dynamic characterisation of a test site in Messina (Italy). Annals of Geophysics. 2018; 61 (2):222.
Chicago/Turabian StyleFrancesco Castelli; Antonio Cavallaro; Antonio Ferraro; Salvatore Grasso; Valentina Lentini; Maria Rossella Massimino. 2018. "Dynamic characterisation of a test site in Messina (Italy)." Annals of Geophysics 61, no. 2: 222.
The analysis of the historical reports and previous research projects allowed us to describe high-level seismic risk scenarios for the city of Catania, located on the eastern coast of Sicily (Italy). The geotechnical zonation of the subsoil of the city of Catania suggests a high seismic hazard added to a soil amplification of the ground motion. To this aim field and laboratory tests allowed the definition of a geotechnical characterisation in the city of Catania. For the site characterisation of soils deep site investigations have been undertaken. Borings and dynamic in situ tests have been performed in some selected test sites with the aim to evaluate the soil profiles of shear wave velocity and to retrieve undisturbed samples for laboratory tests. The testing programme consisted of standard classification tests, Oedometer tests, Direct shear tests, Resonant Column and Torsional shear tests. Two equations to draw the complete shear modulus degradation with strain level and the inverse variation of damping ratio with normalized shear modulus respectively have been also proposed. Shear wave velocity profiles experimentally obtained were compared with both in situ and laboratory tests.
Francesco Castelli; Antonio Cavallaro; Antonio Ferraro; Salvatore Grasso; Valentina Lentini; Maria Rossella Massimino. STATIC AND DYNAMIC PROPERTIES OF SOILS IN CATANIA (ITALY). Annals of Geophysics 2018, 61, 221 .
AMA StyleFrancesco Castelli, Antonio Cavallaro, Antonio Ferraro, Salvatore Grasso, Valentina Lentini, Maria Rossella Massimino. STATIC AND DYNAMIC PROPERTIES OF SOILS IN CATANIA (ITALY). Annals of Geophysics. 2018; 61 (2):221.
Chicago/Turabian StyleFrancesco Castelli; Antonio Cavallaro; Antonio Ferraro; Salvatore Grasso; Valentina Lentini; Maria Rossella Massimino. 2018. "STATIC AND DYNAMIC PROPERTIES OF SOILS IN CATANIA (ITALY)." Annals of Geophysics 61, no. 2: 221.
Eastern Sicily is very rich of historical buildings, but at the same time is one of the most seismically active areas of Italy. In particular, the city of Augusta was damaged by the January 11, 1693 Val di Noto Earthquake, as well as some others Sicilian cities. Afterwards, the strongest earthquake, about 300 years later, was the Sicilian Earthquake of December 13, 1990, with an epicenter close to Augusta and maximum intensity of VII–VIII MCS. In order to study the geotechnical dynamic characteristics of the foundation soil of the Augusta Hangar, in situ investigations and laboratory tests have been carried out. Among in situ investigations, borings, standard penetration tests (SPT), field vane tests (FVT), Ménard pressure meter tests (MPT), down-hole tests (DHT) have been carried out. Among laboratory tests oedometer tests, direct shear tests (DST), consolidated drained triaxial tests (CDTXT), n. 6 undrained triaxial tests (UTXT), cyclic loading torsional shear tests (CLTST), resonant column tests (RCT) have been carried out. Special attention has been devoted to the variation of the Young modulus non-linearity, shear modulus G, and damping ratio D by cyclic loading triaxial tests and resonant column tests. This paper tries to summarize this information in a comprehensive way in order to provide a representative geotechnical model of the site where an important historical building is located. Processing of all these data also allowed the ground response analysis at the surface, in terms of time history and response spectra, using as input in the linear-equivalent codes EERA, STRATA, and DEEPSOIL both synthetic seismograms and recorded accelerograms. The results of the ground response analyses represent useful tools for the safeguard of historical buildings and have been used for the planning of the seismic improvement interventions.
Antonio Cavallaro; Francesco Castelli; Antonio Ferraro; Salvatore Grasso; Valentina Lentini. Site response analysis for the seismic improvement of a historical and monumental building: the case study of Augusta Hangar. Bulletin of Engineering Geology and the Environment 2017, 77, 1217 -1248.
AMA StyleAntonio Cavallaro, Francesco Castelli, Antonio Ferraro, Salvatore Grasso, Valentina Lentini. Site response analysis for the seismic improvement of a historical and monumental building: the case study of Augusta Hangar. Bulletin of Engineering Geology and the Environment. 2017; 77 (3):1217-1248.
Chicago/Turabian StyleAntonio Cavallaro; Francesco Castelli; Antonio Ferraro; Salvatore Grasso; Valentina Lentini. 2017. "Site response analysis for the seismic improvement of a historical and monumental building: the case study of Augusta Hangar." Bulletin of Engineering Geology and the Environment 77, no. 3: 1217-1248.
South-Eastern Sicily has been affected in past times by several destroying earthquakes with high values of estimated magnitude. The aim of the seismic hazard microzonation studies performed at the City of Noto is to quantify the spatial variability of the site response on some typical historical scenario earthquakes that would be expected in the area. In order to quantify the expected ground motion, the manner in which the seismic signal is propagating through the subsurface has been defined. Propagation is particularly affected by the local geology and by the geotechnical dynamic ground conditions of the studied area. The data largely consist of the stratigraphic profiles obtained by in situ tests i.e. borings, MASW tests, Down-Hole tests, SDMT tests; some are accompanied by static and dynamic laboratory tests, such as Resonant Column, monotonic compression loading Triaxial tests and Direct shear tests. Processing of all these data allowed the ground response analysis at the surface, in terms of time history and response spectra, of some areas of the city using the linear-equivalent codes EERA, STRATA and DEEPSOIL, useful for microzonation of seismic geotechnical hazards.
Francesco Castelli; Antonio Cavallaro; Antonio Ferraro; Salvatore Grasso; Valentina Lentini. A Seismic Geotechnical Hazard Study in the Ancient City of Noto (Italy). Procedia Engineering 2016, 158, 535 -540.
AMA StyleFrancesco Castelli, Antonio Cavallaro, Antonio Ferraro, Salvatore Grasso, Valentina Lentini. A Seismic Geotechnical Hazard Study in the Ancient City of Noto (Italy). Procedia Engineering. 2016; 158 ():535-540.
Chicago/Turabian StyleFrancesco Castelli; Antonio Cavallaro; Antonio Ferraro; Salvatore Grasso; Valentina Lentini. 2016. "A Seismic Geotechnical Hazard Study in the Ancient City of Noto (Italy)." Procedia Engineering 158, no. : 535-540.
Eastern Sicily is very rich of monuments and historical buildings, but at the same time is one of the most seismically active areas of Italy. In particular the city of Noto, which is now considered the capital of Baroque in Sicily, was destroyed by the 1693 Val di Noto Earthquake and rebuilt in another site, as in the case of some others cities. In order to study the geotechnical dynamic characteristics of the foundation soil of monuments, in situ investigations and laboratory tests have been carried out. Among in situ investigations, Borings, SPT, CPT, D-H, C-H and DMT have been carried out. Among laboratory tests, special attention has been devoted to the variation of the Young modulus non linearity, shear modulus G and damping ratio D by Cyclic Loading Triaxial tests and Resonant Column tests. This paper tries to summarize this information in a comprehensive way in order to provide a representative geotechnical model of the sites where important monuments are located.
Antonio Cavallaro; Salvatore Grasso; Antonio Ferraro. A Geotechnical Engineering Study for the Safeguard, Restoration and Strengthening of Historical Heritage. Procedia Engineering 2016, 158, 134 -139.
AMA StyleAntonio Cavallaro, Salvatore Grasso, Antonio Ferraro. A Geotechnical Engineering Study for the Safeguard, Restoration and Strengthening of Historical Heritage. Procedia Engineering. 2016; 158 ():134-139.
Chicago/Turabian StyleAntonio Cavallaro; Salvatore Grasso; Antonio Ferraro. 2016. "A Geotechnical Engineering Study for the Safeguard, Restoration and Strengthening of Historical Heritage." Procedia Engineering 158, no. : 134-139.
The city of Catania (Italy) in the South-Eastern Sicily has been affected in past times by several destroying earthquakes with high values of estimated magnitude. The seismogenic area to the south of Volcano Etna, known as Iblean Area, is placed between the African and the Euro-Asiatic plates on the west of the Ibleo-Maltese escarpment, to the south of the Graben of the Sicilian channel and on the east of the overlapping front of Gela. Basing on the seismic history of Catania, the following earthquake scenarios have been considered: the “Val di Noto” earthquake of January 11, 1693 (with intensity X-XI on MCS scale, magnitude MW=7.41 and epicentral distance of about 13 km); the “Etna” earthquake of February 20, 1818 (with intensity IX on MCS scale, magnitude MW=6.23 and epicentral distance of about 10 km). The soil response analysis at the surface, in terms of time history and response spectra, has been obtained by 1-D equivalent linear models for about 1200 borings location available in the data-bank of the central area of Catania of about 50 km2, using deterministic design scenario earthquakes as input at the conventional bedrock. Seismic microzoning maps of the city of Catania have been obtained in terms of different peak ground acceleration at the surface and in terms of amplification ratios for given values of frequency.
F. Castelli; A. Cavallaro; S. Grasso; V. Lentini. Seismic microzoning from synthetic ground motion earthquake scenarios parameters: The case study of the city of Catania (Italy). Soil Dynamics and Earthquake Engineering 2016, 88, 307 -327.
AMA StyleF. Castelli, A. Cavallaro, S. Grasso, V. Lentini. Seismic microzoning from synthetic ground motion earthquake scenarios parameters: The case study of the city of Catania (Italy). Soil Dynamics and Earthquake Engineering. 2016; 88 ():307-327.
Chicago/Turabian StyleF. Castelli; A. Cavallaro; S. Grasso; V. Lentini. 2016. "Seismic microzoning from synthetic ground motion earthquake scenarios parameters: The case study of the city of Catania (Italy)." Soil Dynamics and Earthquake Engineering 88, no. : 307-327.
Antoniomariafrancesco Cavallaro; L Cessari; Elena Gigliarelli. Site characterization by in situ and laboratory tests for the structural & architectural restoration of Saint Nicholas Church, Nicosia, Cyprus. Geotechnical Engineering for the Preservation of Monuments and Historic Sites 2013, 241 -247.
AMA StyleAntoniomariafrancesco Cavallaro, L Cessari, Elena Gigliarelli. Site characterization by in situ and laboratory tests for the structural & architectural restoration of Saint Nicholas Church, Nicosia, Cyprus. Geotechnical Engineering for the Preservation of Monuments and Historic Sites. 2013; ():241-247.
Chicago/Turabian StyleAntoniomariafrancesco Cavallaro; L Cessari; Elena Gigliarelli. 2013. "Site characterization by in situ and laboratory tests for the structural & architectural restoration of Saint Nicholas Church, Nicosia, Cyprus." Geotechnical Engineering for the Preservation of Monuments and Historic Sites , no. : 241-247.
The study regards an evaluation of site effects on and near the Monte Po hill, located in the north-eastern part of the city of Catania (Italy), an area at high seismic risk. At the beginning of 2007 a seismic station was located in a school building, situated at the slope toe, but no seismic events have been recorded as yet. Therefore, synthetic seismograms have been used to evaluate the ground response analysis at the surface. Because the average slope is moderate (less than 15°), 1-D computer codes have been used to model the equivalent-linear earthquake site response analyses of layered hill deposits, as generally performed by professionals. However, the slope response has also been analysed in greater detail, using a 2-D computer code and the soil characterisation has been evaluated accurately by means of borings, Down-Hole tests, SDMT tests and laboratory tests. Comparing 1-D with 2-D results the stratigraphic site amplification and the Topographic Aggravation Factor (TAF) have also been computed. The aim of the study is that it will form a basis for the design of works to remediate the damage caused by a landslide reactivated by the earthquake in Eastern Sicily on December 13, 1990 (ML=5.4).
Antoniomariafrancesco Cavallaro; A. Ferraro; Salvatore Grasso; M. Maugeri. Topographic effects on the Monte Po Hill in Catania (Italy). Soil Dynamics and Earthquake Engineering 2012, 43, 97 -113.
AMA StyleAntoniomariafrancesco Cavallaro, A. Ferraro, Salvatore Grasso, M. Maugeri. Topographic effects on the Monte Po Hill in Catania (Italy). Soil Dynamics and Earthquake Engineering. 2012; 43 ():97-113.
Chicago/Turabian StyleAntoniomariafrancesco Cavallaro; A. Ferraro; Salvatore Grasso; M. Maugeri. 2012. "Topographic effects on the Monte Po Hill in Catania (Italy)." Soil Dynamics and Earthquake Engineering 43, no. : 97-113.
The Monte Po Hill is located in the North‐eastern part of the city of Catania; this area is prone to high seismic risk due to the presence of several constructions, including a school, in the vicinity of a toe of a slope, characterized by precarious stability conditions. For site characterization of the soil, deep site investigations have been undertaken. Borings and dynamic in situ tests have been performed. Among them Down‐Hole (D‐H) and Seismic Dilatometer Marchetti Tests (SDMT) have been carried out, with the aim to evaluate the soil profile of shear waves velocity (Vs). The Seismic Dilatometer Marchetti Tests were performed up to a depth of 15 meters. The results show a very detailed and stable shear waves profile. The shear waves profiles obtained by SDMT compare well with other in situ tests. Synthetic seismograms have been drawn for the site long a set of receivers placed at different depths, starting from the surface up to almost 40 m. After evaluating the synthetic accelerograms at the bedrock, the ground response analysis at the surface, in terms of time history and response spectra, has been obtained by a 1‐D non‐linear model. In particular the study has regarded the evaluation of site effects in correspondence of the site, to which corresponds a different value of the Seismic Geotechnical Hazard. In the beginning of 2007 a seismic station has been also located into the school building, with the aim of recording seismic events. Seismograms obtained by the seismic station have been also used to evaluate the ground response analysis at the surface. In the beginning of 2007 a seismic station has been also located into the school building, with the aim of recording seismic events. Seismograms obtained by the seismic station have been also used to evaluate the ground response analysis at the surface. Finally the 1‐D computer code EERA was also used to model the equivalent‐linear earthquake site response analyses of layered soil deposits of the hill. The detail with which the hill has been studied has allowed the construction of a detailed 2‐D model of its structure. It has been explored the differences between the computed ground motion for different Vs profiles using QUAD4M 2‐D code. It has been also possible to compare the results from different 1‐D models reflecting current approaches to the determination of site response.
Antoniomariafrancesco Cavallaro; A. Ferraro; Salvatore Grasso; Michele Maugeri; Adolfo Santini; Nicola Moraci. Site Response Analysis of the Monte Po Hill in the City of Catania. AIP Conference Proceedings 2008, 1020, 240 .
AMA StyleAntoniomariafrancesco Cavallaro, A. Ferraro, Salvatore Grasso, Michele Maugeri, Adolfo Santini, Nicola Moraci. Site Response Analysis of the Monte Po Hill in the City of Catania. AIP Conference Proceedings. 2008; 1020 (1):240.
Chicago/Turabian StyleAntoniomariafrancesco Cavallaro; A. Ferraro; Salvatore Grasso; Michele Maugeri; Adolfo Santini; Nicola Moraci. 2008. "Site Response Analysis of the Monte Po Hill in the City of Catania." AIP Conference Proceedings 1020, no. 1: 240.
The Tito Scalo site, located near the city of Potenza in the Basilicata region in Southern Italy, is a high seismic risk area. Borings and dynamic in situ tests have been performed. Among them Down Hole (D-H), Noise Analysis Surface Waves (NASW) and Seismic Dilatometer Marchetti Tests (SDMT) have been carried out, with the aim to evaluate the of shear-wave velocity (Vs) profile of the soil. The results show a very detailed and stable shear-wave profile. After evaluating the synthetic accelerograms at the bedrock, the ground response analysis at the surface, in terms of time histories and response spectra, has been obtained by two non-linear models GEODIN and EERA.
Antoniomariafrancesco Cavallaro; Salvatore Grasso; Michele Maugeri. Site Response Analysis for Tito Scalo Area (PZ) in the Basilicata Region, Italy. Geotechnical Earthquake Engineering and Soil Dynamics IV 2008, 1 -11.
AMA StyleAntoniomariafrancesco Cavallaro, Salvatore Grasso, Michele Maugeri. Site Response Analysis for Tito Scalo Area (PZ) in the Basilicata Region, Italy. Geotechnical Earthquake Engineering and Soil Dynamics IV. 2008; ():1-11.
Chicago/Turabian StyleAntoniomariafrancesco Cavallaro; Salvatore Grasso; Michele Maugeri. 2008. "Site Response Analysis for Tito Scalo Area (PZ) in the Basilicata Region, Italy." Geotechnical Earthquake Engineering and Soil Dynamics IV , no. : 1-11.
Since the eastern Sicily has been struck by various disastrous earthquakes with a MKS intensity from IX to XI in the last 900 years, an investigation program was performed in different test sites to evaluate the dynamic clayey soils behaviour. The following dynamic investigations in the laboratory were carried out on undisturbed samples: Resonant Column Tests (RCT), Cyclic Loading Torsional Shear Tests (CLTST) and Cyclic Loading Triaxial Tests (CLTxT). The influence of the type of tests, of the strain rate and of the number of loading cycles on G-γ and D-γ curves, as well as on pore pressure build-up, was evaluated by means of laboratory tests. Moreover in situ investigations were carried out in order to determine the soil profile and the geotechnical characteristics for the site under consideration. Borings, Standard Penetration Test (SPT), Cone Penetration Test (CPT), Down Hole (DH) Tests and new Seismic Marchetti Dilatometer Tests (SDMT) were performed. The available data enabled one to obtain a comparison between the small strain shear modulus (DH, SDMT and laboratory tests) for the specific site. It was also possible to compare in situ and laboratory small strain shear and the G-γ curve for soil non-linearity evaluation..
A. Cavallaro; Salvatore Grasso; M. Maugeri. Dynamic Clay Soils Behaviour by Different Laboratory and In Situ Tests. Solid Mechanics 2007, 583 -594.
AMA StyleA. Cavallaro, Salvatore Grasso, M. Maugeri. Dynamic Clay Soils Behaviour by Different Laboratory and In Situ Tests. Solid Mechanics. 2007; ():583-594.
Chicago/Turabian StyleA. Cavallaro; Salvatore Grasso; M. Maugeri. 2007. "Dynamic Clay Soils Behaviour by Different Laboratory and In Situ Tests." Solid Mechanics , no. : 583-594.
Welcome to the WIT Press eLibrary - the home of the Transactions of the Wessex Institute collection, providing on-line access to papers presented at the Institute's prestigious international conferences and from its State-of-the-Art in Science & Engineering publications.
A. Cavallaro; M. Maugeri. Non-linear behaviour of sandy soil for the city of Catania. Regional Airports 2005, 115 -132.
AMA StyleA. Cavallaro, M. Maugeri. Non-linear behaviour of sandy soil for the city of Catania. Regional Airports. 2005; ():115-132.
Chicago/Turabian StyleA. Cavallaro; M. Maugeri. 2005. "Non-linear behaviour of sandy soil for the city of Catania." Regional Airports , no. : 115-132.
On 13th March 1996 the dome of the St. Nicolò Cathedral of Noto fell due to a post-seismic structural collapse. In order to study the soil–structure interaction a comprehensive laboratory and in situ investigation has been carried out to obtain a soil profile. In this paper the dynamic characterisation results and normalised laws are proposed to consider shear modulus decay and damping ratio increase with strain level. The existing foundations of the cathedral were investigated by means of excavations and tests on the stones and the mortar. In this way the foundations were subjected to visual inspections to detect their size and their embedment level. Now, the soil–foundation interaction has been analysed by means of the finite element code SOFIA, considering at this stage the superstructure weight through the influence area approach. In particular, the effects of the designed remedial work of the foundation have been studied, comparing the two configurations before and after the foundation improvement.
A. Cavallaro; M.R. Massimino; M. Maugeri. Noto Cathedral: soil and foundation investigation. Construction and Building Materials 2003, 17, 533 -541.
AMA StyleA. Cavallaro, M.R. Massimino, M. Maugeri. Noto Cathedral: soil and foundation investigation. Construction and Building Materials. 2003; 17 (8):533-541.
Chicago/Turabian StyleA. Cavallaro; M.R. Massimino; M. Maugeri. 2003. "Noto Cathedral: soil and foundation investigation." Construction and Building Materials 17, no. 8: 533-541.
Antoniomariafrancesco Cavallaro; M Maugeri; G Lanzo; A Pagliaroli; D Lo Presti. A comparative study on shear modulus and damping ratio of cohesive soil from laboratory tests. Deformation Characteristics of Geomaterials / Comportement Des Sols Et Des Roches Tendres 2003, 1 .
AMA StyleAntoniomariafrancesco Cavallaro, M Maugeri, G Lanzo, A Pagliaroli, D Lo Presti. A comparative study on shear modulus and damping ratio of cohesive soil from laboratory tests. Deformation Characteristics of Geomaterials / Comportement Des Sols Et Des Roches Tendres. 2003; ():1.
Chicago/Turabian StyleAntoniomariafrancesco Cavallaro; M Maugeri; G Lanzo; A Pagliaroli; D Lo Presti. 2003. "A comparative study on shear modulus and damping ratio of cohesive soil from laboratory tests." Deformation Characteristics of Geomaterials / Comportement Des Sols Et Des Roches Tendres , no. : 1.
This paper concerns the stiffness assessment of undisturbed clays from triaxial tests. The paper summarizes the research activity undertaken at the authors' universities over the last five years by means of triaxial cells equipped with local gages for axial and radial strain measurements and with piezoceramic bender elements for the measurement of the propagation velocity of differently polarized shear waves. The main purpose of this research was to define reliable test procedures in order to determine the stiffness of geomaterials to be used for settlement analysis under working load conditions. In particular the paper deals with four different topics: (1) evaluation of sample disturbance by means of different methods, (2) assessment of the reconsolidation techniques that minimize the sample disturbance effects, (3) influence of strain rate on the stiffness of undisturbed clays, (4) stiffness anisotropy of undisturbed clays at small strains.
Rc Chaney; Kr Demars; Dcf Lo Presti; O Pallara; Antoniomariafrancesco Cavallaro; M Jamiolkowski. Influence of Reconsolidation Techniques and Strain Rate on the Stiffness of Undisturbed Clays from Triaxial Tests. Geotechnical Testing Journal 1999, 22, 211 -225.
AMA StyleRc Chaney, Kr Demars, Dcf Lo Presti, O Pallara, Antoniomariafrancesco Cavallaro, M Jamiolkowski. Influence of Reconsolidation Techniques and Strain Rate on the Stiffness of Undisturbed Clays from Triaxial Tests. Geotechnical Testing Journal. 1999; 22 (3):211-225.
Chicago/Turabian StyleRc Chaney; Kr Demars; Dcf Lo Presti; O Pallara; Antoniomariafrancesco Cavallaro; M Jamiolkowski. 1999. "Influence of Reconsolidation Techniques and Strain Rate on the Stiffness of Undisturbed Clays from Triaxial Tests." Geotechnical Testing Journal 22, no. 3: 211-225.
The shear modulus (G) and damping ratio (D) of two natural clays and both siliceous and carbonatic pluvially-deposited dry sands have been measured at the authors' laboratory by means of a Resonant Column/Torsional Shear apparatus for a strain range of 0·0001% up to 1%. Different kinds of tests were performed on hollow cylindrical specimens off all the: (a) monotonic loading torsional shear tests at constant stress rate, (b) cyclic loading torsional shear tests at constant strain rate or at constant frequency and (c) Resonant Column tests. The results of the above tests enabled the authors to analyse the influence of strain level (&ama;), loading rate (&amadot;), number of loading cycles (N) and type of loading (monotonic or cyclic) on the measured values of G and D. Les auteurs ont mesuré le module de cisaillement (G) et le rapport d'amortissement (D) de deux argiles naturelles et de dépôts pluviaux de sables secs silicieux et carbonatitiques dans leur laboratoire à I'aide d'essais à colonne résonante et d'essais de cisaillement par torsion dans une plage de contraintes de 0,0001% à 1%. Différents types d'essais ont été effectués avant tout sur des éprouvettes cylindriques creuses: (a) des essais de cisaillement par torsion à charge monotone et à taux de contrainte constant, (b) des essais de cisaillement par torsion à charge cyclique à taux de contrainte constant on à fréquence constante, et (c) des essais à colonne résonante. Les résultats de ces essais ont permis aux auteurs d'analyser I'influence du niveau de deformation, du taux de charge, du nombre de cycles de charge (N) et du type de charge (monotone ou cyclique) sur les valeurs mesur6es de G et D.
Diego Carlo Lo Presti; M. Jamiolkowski; O. Pallara; Antoniomariafrancesco Cavallaro; S. Pedroni. Shear modulus and damping of soils. Géotechnique 1997, 47, 603 -617.
AMA StyleDiego Carlo Lo Presti, M. Jamiolkowski, O. Pallara, Antoniomariafrancesco Cavallaro, S. Pedroni. Shear modulus and damping of soils. Géotechnique. 1997; 47 (3):603-617.
Chicago/Turabian StyleDiego Carlo Lo Presti; M. Jamiolkowski; O. Pallara; Antoniomariafrancesco Cavallaro; S. Pedroni. 1997. "Shear modulus and damping of soils." Géotechnique 47, no. 3: 603-617.