Giuseppe Lanzo

Giuseppe Lanzo
Sapienza University of Rome | la sapienza · Department of Structural and Geotechnical Engineering

PhD

About

141
Publications
81,951
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,884
Citations
Citations since 2016
54 Research Items
1229 Citations
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200

Publications

Publications (141)
Chapter
On October 30, 2020, a damaging earthquake of moment magnitude 6.6 struck about 14 km northeast of the island of Samos, Greece, and about 70 km from the center of the city of Izmir in Turkey. Even though the epicenter was relatively far away, the effects of the seismic event in the highly populated city center of Izmir were destructive causing over...
Conference Paper
On October 30, 2020, a damaging earthquake of moment magnitude 6.6 struck about 14 km northeast of the island of Samos, Greece, and about 70 km from the center of the city of Izmir in Turkey. Even though the epicenter was relatively far away, the effects of the seismic event in the highly populated city center of Izmir were destructive causing over...
Preprint
Full-text available
The soil nonlinear hysteretic behaviour is usually described, in the moderate strain range, through the shear modulus reduction and material damping ratio (MRD) curves. In the common practice, in absence of specific laboratory tests, the curves are estimated by employing empirical regression models. Such predictive models, typically calibrated on l...
Article
An in-depth study is presented on some numerical formulations used to reproduce damping of motion in solid continua. The focus is addressed in particular to those formulations that in the finite difference geotechnical code FLAC can be exploited to perform linear analyses. The numerical investigations are performed through a simple 1D model of a ho...
Conference Paper
Full-text available
On 30 October 2020, a strong earthquake of moment magnitude 7.0 struck the city of Izmir (Turkey), which induced total or partial collapses of multiple buildings, triggered a tsunami on the coastal areas of southern Izmir province, Turkey and Greek islands with a tragic final balance of 119 deaths. The quake struck 12 km north of the Greek island o...
Article
The 2016 Italian seismic sequence was characterized by three main shocks that occurred on August 24th, on October 26th and 30th. The latter, a Mw 6.5 event, is the strongest seismic event recorded in Italy since the 1980, Mw 6.9 Irpinia Earthquake. In this time span between the first and the third shock of the 2016 sequence, more than 1000 seismic...
Chapter
Full-text available
RIASSUNTO-Lo scopo di questo lavoro è lo studio degli effetti dei terremoti nell'Area Archeologica Centrale di Roma com-prendente Colle Palatino, Colosseo, Fori Romani e Circo Mas-simo, con particolare riferimento agli eventi sismici di origine appenninica. Gli scenari di danno verificatesi in epoca storica sono confrontati con i risultati di una m...
Article
Full-text available
The investigation of soil response to dynamic loads is necessary to predict site-specific seismic hazard. This paper presents the results of cyclic and dynamic laboratory tests carried out after the 2016–2017 Central Italy Earthquake sequence, within the framework of the seismic microzonation studies of the most damaged municipalities in the area....
Article
Full-text available
The paper presents the results of 5 case studies on complex site effects selected within the project for the level 3 seismic microzonation of several municipalities of Central Italy damaged by the 2016 seismic sequence. The case studies are characterized by different geological and morphological configurations: Monte San Martino is located along a...
Article
Full-text available
Nowadays, policies addressed to prevention and mitigation of seismic risk need a consolidated methodology finalised to the assessment of local seismic response in explosive volcanic settings. The quantitative reconstruction of the subsoil model provides a key instrument to understand how the geometry and the internal architecture of outcropping and...
Article
Located on the top of a volcanic butte, Civita di Bagnoregio is one of the most beautiful villages in Central Italy. This hamlet, which dates back to the Etruscan era, is a medieval cluster of enchanting beauty and a massive tourist attraction that counted more than six hundred thousand visitors in 2016. The peculiar combination of geological condi...
Research
This note presents the results of constant-volume equivalent-undrained cyclic simple shear tests performed on saturated natural silty soils obtained from two different locations in the Kathmandu valley (Nepal) and characterized by different plasticity. Two simple shear devices were employed: the DSDSS (Double Specimen Cyclic Simple Shear) device an...
Article
Full-text available
Between August and November 2016, three major earthquake events occurred in Central Italy. The first event, with M6.1, took place on 24 August 2016, the second (M5.9) on 26 October, and the third (M6.5) on 30 October 2016. Each event was followed by numerous aftershocks. The 24 August event caused massive damages especially to the villages of Arqua...
Article
Full-text available
Because of an error during the editorial process the first name initial of author Ernesto Ausilio was incorrectly given as A. (A. Ausilio) in the initial online publication. It should obviously be E. Ausilio. The original article has been corrected. © 2018 Springer Science+Business Media B.V., part of Springer Nature
Conference Paper
Full-text available
The seismic design of new earth-core dams dams as well as the seismic re-assessment of existing ones with advanced numerical simulations require the knowledge of dynamic properties of core materials in a wide range of shear strains. The key parameters to be determined are the shear wave velocity Vs (or the maximum shear modulus G0) and the normaliz...
Presentation
Full-text available
Clays with higher undisturbed undrained shear strengths than remoulded strengths are considered sensitive. While the stress-strain behaviour of these clays under monotonic loading condition was widely investigated, few data are available of their behaviour under cyclic and dynamic loading conditions. This paper presents the preliminary results of a...
Conference Paper
Full-text available
Clays with higher undisturbed undrained shear strengths than remoulded strengths are considered sensitive. While the stress-strain behaviour of these clays under monotonic loading condition was widely investigated, few data are available of their behaviour under cyclic and dynamic loading conditions. This paper presents the preliminary results of a...
Conference Paper
Full-text available
The August and October 2016 earthquakes caused several instability phenomena on rock slopes over a large area of the Apennine mountain chain. Major rock slides and rock falls were caused by the October earthquakes, which involved the northern part of the damaged area and surprisingly triggered relevant rock falls in the southernmost part. The dista...
Conference Paper
Full-text available
An accurate measurement of dynamic soil properties is essential to predict the nonlinear soil behavior under seismic loading conditions. This paper presents a database of cyclic and dynamic laboratory tests carried out after the 2016-2017 Central Italy Earthquake sequence, as part of the seismic microzonation studies in the area. The database consi...
Conference Paper
Full-text available
This paper presents the results of a series of laboratory investigations into the dynamic properties of core materials of Italian earth-core rockfill dams. All tests have been performed on specimens of undisturbed samples reconsolidated in a wide range of effective confining stresses. Most of the data were obtained from cyclic simple shear tests an...
Article
Full-text available
The Tower of Pisa has survived several strong earthquakes undamaged over the last 650 years, despite its leaning and limited strength and ductility. No credible explanation for its remarkable seismic performance exists to date. A reassessment of this unique case history in light of new seismological, geological, structural, and geotechnical informa...
Article
Full-text available
Clays with higher undisturbed undrained shear strengths than remoulded strengths are considered sensitive. While the stress-strain behaviour of these clays under monotonic loading condition was widely investigated, few data are available of their behaviour under cyclic and dynamic loading conditions. This paper presents the preliminary results of a...
Article
The Central Italy earthquake sequence nominally began on 24 August 2016 with aM6.1 event on a normal fault that produced devastating effects in the town of Amatrice and several nearby villages and hamlets. A major international response was undertaken to record the effects of this disaster, including surface faulting, ground motions, landslides, an...
Conference Paper
Full-text available
La salvaguardia del patrimonio infrastrutturale esistente è un argomento di sempre maggiore attualità in diversi settori dell’ingegneria civile. Nel settore delle dighe esistenti un tema sempre più presente è quello della rivalutazione della sicurezza sismica delle dighe di materiali sciolti. Le motivazioni di questa rinnovata attenzione sono molte...
Article
The Central Italy earthquake sequence nominally began on 24 August 2016 with aM6.1 event on a normal fault that produced devastating effects in the town of Amatrice and several nearby villages and hamlets. A major international response was undertaken to record the effects of this disaster, including surface faulting, ground motions, landslides, an...
Article
Full-text available
A database of numerical ground response analyses has been generated to assess the effectiveness of site classification schemes adopted in seismic building codes. 1-D Ground models have been generated with a stochastic approach based on a Monte Carlo procedure and the corresponding seismic response has been evaluated by the equivalent linear elastic a...
Article
Full-text available
A sound knowledge of the dynamic properties of soils is needed to solve several geotechnical engineering problems associated with earthquakes. Here we describe a laboratory investigation performed to measure the dynamic properties of the Plaisancian deposit of marls in the Algiers region using cyclic triaxial tests, cyclic double specimen direct si...
Article
The paper reports on the results of 1D and 2D site response analyses carried out in the Kathmandu Valley, Nepal, in order to investigate how site effects influenced the seismic response during the 2015 Mw 7.8 Gorkha earthquake sequence. The mainshock and a Mw 6.6 aftershock, for which recordings at both rock and soil sites are available, were consi...
Article
Full-text available
11 The Central Italy earthquake sequence initiated on 24 August 2016 with a moment 12 magnitude M6.1 event followed by a M5.9 and a M6.5 earthquake, that caused 13 significant damage and loss of life in the town of Amatrice and other nearby villages 14 and hamlets. The significance of this sequence led to a major international 15 reconnaissance eff...
Article
Full-text available
This article presents the main results of the validation phase of the PRENOLIN project. PRENOLIN is an international benchmark on 1D nonlinear (NL) site‐response analysis. This project involved 19 teams with 23 different codes tested. It was divided into two phases; with the first phase verifying the numerical solution of these codes on idealized s...
Conference Paper
Full-text available
La Calabria è una delle regioni della penisola italiana interessata storicamente da terremoti di forte intensità e da sequenze sismiche di bassa magnitudo, anche di lunga durata, che evidenziano una sua costante evoluzione tettonica e un'elevata pericolosità sismica. La Regione Calabria, ormai da anni, svolge attività diversificate che mirano ad un...
Article
Full-text available
Twenty years have passed from the most recent studies about the dynamic behavior of the leaning Tower of Pisa. Significant changes have occurred in the meantime, the most important ones concerning the soil-structure interaction. From 1999 to 2001, the foundation of the monument was consolidated through under-excavation, and the "Catino" at the base...
Conference Paper
Full-text available
The paper describes the numerical analyses carried out on the 65-m high Licodia Eubea concrete gravity dam under Collapse Limit State (CLS) earthquake scenario. The finite difference FLAC code was employed taking into account the interaction effects between the dam, the impounded reservoir, the sediments accumulated at the bottom of the reservoir a...
Technical Report
Full-text available
From August to October of 2016, central Italy experienced a devastating sequence of earthquakes that produced nearly complete destruction of several historic villages, some massive landslides, pronounced surface fault rupture on a normal fault system, extensive sets of ground motion recordings, and many other effects. GEER responded to this disaste...
Conference Paper
Full-text available
An earthquake with a moment magnitude reported as 6.0 from INGV (Istituto Nazionale di Geofisica e Vulcanologia); occurred at 03:36 AM (local time) on 24 August 2016 in the central part of Italy. The epicenter was located at the borders of the Lazio, Abruzzi, Marche and Umbria regions, about 2.5 km northeast of the village of Accumoli and about 100...
Article
Full-text available
PREdiction of NOn-LINear soil behavior (PRENOLIN) is an international benchmark aiming to test multiple numerical simulation codes that are capable of predicting nonlinear seismic site response with various constitutive models. One of the objectives of this project is the assessment of the uncertainties associated with nonlinear simulation of 1D si...
Conference Paper
Full-text available
The paper describes the geotechnical investigations and analyses carried out for the restoration of the ancient Basilica di Collemaggio, L’Aquila (Italy), severely damaged by the 2009 earthquake. The subsoil model was defined based on a comprehensive investigation including boreholes, measurements of shear wave velocity VS by seismic dilatometer (S...
Article
Full-text available
Understanding the structural behavior of heritage buildings is usually a very complicated task because they typically present complex deterioration and damage patterns which cannot be fully evaluated by means of visual inspections. Moreover, the reliability of such constructions largely depends on different materials, structural components and deta...
Article
Full-text available
The most recent studies about the seismic behavior of the leaning Tower of Pisa that consider the soil-foundation-structure interaction date back to twenty years ago. From 1999 to 2001, the foundation of the monument was consolidated by means of under-excavation and the "Catino" at the basement was rigidly connected to the foundation. Meanwhile, si...
Conference Paper
Two soft offshore clays, recovered from the Adriatic shelf and the Tyrrhenian shelf margin (Italy), were subjected to cyclic simple shear tests. The influence of the cyclic shear strain amplitude as well as of vertical stress, void ratio and stress history on stiffness and damping properties of the soils, in a wide strain range (i.e. from 10-4 % to...
Article
Site response analysis is quite significant in geotechnical earthquake engineering. However, confusions arise on the specification of input motion in the usage of procedures in numerical studies. The present work investigates the accuracy and correctness of two ways of motion to be applied in practice for the time domain seismic response analysis w...
Conference Paper
Full-text available
The selection of natural accelerograms for use in nonlinear analyses of earth dams is still a challenging issue. Customary approaches make essentially use of factors such as earthquake magnitude, distance and site class to obtain spectrum-compatible records with a target spectrum. However, wide ranges in displacements predictions can still occur wh...
Research
Full-text available
The investigated area corresponds to the whole Tiber alluvial plain crossing the urban area of Rome within the G.R.A. (Grande Raccordo Anulare) highway ring.