Site effects and damage scenarios: The case study of two historic centers following the 2016 Central Italy earthquake

2020 ◽  
Vol 272 ◽  
pp. 105647 ◽  
Author(s):  
Giuseppe Brando ◽  
Alessandro Pagliaroli ◽  
Giulia Cocco ◽  
Francesco Di Buccio
Keyword(s):  
Site Effects ◽  
Central Italy ◽  
Damage Scenarios ◽  
Central Italy Earthquake

Seismic response of RC buildings during the Mw 6.0 August 24, 2016 Central Italy earthquake: the Amatrice case study

2017 ◽  
Vol 17 (10) ◽  
pp. 5631-5654 ◽  
Author(s):  
A. Masi ◽  
L. Chiauzzi ◽  
G. Santarsiero ◽  
V. Manfredi ◽  
S. Biondi ◽  
...  
Keyword(s):  
Seismic Response ◽  
Central Italy ◽  
Rc Buildings ◽  
Central Italy Earthquake

scholarly journals Local Site Effects and Incremental Damage of Buildings during the 2016 Central Italy Earthquake Sequence

2018 ◽  
Vol 34 (4) ◽  
pp. 1639-1669 ◽  
Author(s):  
Anastasios Sextos ◽  
Raffaele De Risi ◽  
Alessandro Pagliaroli ◽  
Sebastiano Foti ◽  
Federico Passeri ◽  
...  
Keyword(s):  
Site Effects ◽  
Seismic Waves ◽  
Central Italy ◽  
Lessons Learned ◽  
Earthquake Sequence ◽  
Topographic Effects ◽  
Local Site Effects ◽  
Central Italy Earthquake ◽  
Local Site ◽  
Sequence Of Events

The Central Italy earthquake sequence initiated on 24 August 2016 with a moment magnitude M6.1 event, followed by two earthquakes (M5.9 and M6.5) on 26 and 30 October, caused significant damage and loss of life in the town of Amatrice and other nearby villages and hamlets. The significance of this sequence led to a major international reconnaissance effort to thoroughly examine the effects of this disaster. Specifically, this paper presents evidences of strong local site effects (i.e., amplification of seismic waves because of stratigraphic and topographic effects that leads to damage concentration in certain areas). It also examines the damage patterns observed along the entire sequence of events in association with the spatial distribution of ground motion intensity with emphasis on the clearly distinct performance of reinforced concrete and masonry structures under multiple excitations. The paper concludes with a critical assessment of past retrofit measures efficiency and a series of lessons learned as per the behavior of structures to a sequence of strong earthquake events.

scholarly journals Different damage observed in the villages of Pescara del Tronto and Vezzano after the M6.0 August 24, 2016 central Italy earthquake and site effects analysis

2017 ◽  
Vol 59 ◽  
Author(s):  
Angelo Masi ◽  
Giuseppe Santarsiero ◽  
Leonardo Chiauzzi ◽  
Maria Rosaria Gallipoli ◽  
Sabatino Piscitelli ◽  
...  
Keyword(s):  
Site Effects ◽  
Central Italy ◽  
Masonry Building ◽  
Light Damage ◽  
Central Italy Earthquake ◽  
Geophysical Investigations ◽  
Heavy Damage ◽  
Different Levels

<p>The authors have surveyed many damaged villages located at the epicentre of the ML=6.0 earthquake which occurred on August 24, 2016 in central Italy. Some unexpected anomalies were discovered such as very different levels of damage in Vezzano and Pescara del Tronto villages (Arquata del Tronto Municipality, Ascoli Piceno province). The two villages are situated just 1300 meters from each other. Pescara del Tronto suffered very heavy damage with many masonry building collapses and 48 fatalities, while Vezzano suffered only light damage to few buildings. This paper provides a preliminar analysis from an engineering and geophysics perspective. Particularly, rapid visual surveys were carried out in the two villages in order to detect possible significant differences in the vulnerability of their building stocks and site geophysical investigations were performed to detect possible local amplification effects.</p>

Understanding the interacting factors that influence social vulnerability: a case study of the 2016 central Italy earthquake

Disasters ◽  
2019 ◽  
Vol 43 (4) ◽  
pp. 867-890 ◽  
Author(s):  
Ivan Frigerio ◽  
Francesca Zanini ◽  
Matteo Mattavelli ◽  
Mattia De Amicis
Keyword(s):  
Social Vulnerability ◽  
Central Italy ◽  
Central Italy Earthquake

scholarly journals A NOVEL SEISMIC VULNERABILITY ASSESSMENT OF MASONRY FAÇADES: FRAMING AND VALIDATION ON CALDAROLA CASE STUDY AFTER 2016 CENTRAL ITALY EARTHQUAKE

Rivista Tema ◽  
2021 ◽  
Vol 7 (N.2 (2021)) ◽  
Author(s):  
Keyword(s):  
Vulnerability Assessment ◽  
Kinematic Analysis ◽  
Seismic Vulnerability ◽  
Central Italy ◽  
Vulnerability Index ◽  
Assessment Method ◽  
Damage State ◽  
Central Italy Earthquake ◽  
Observed Damage

An important portion of the historical built environment, which is characterized by un-reinforced masonry, is particularly vulnerable to collapse in case of earthquakes, as demonstrated by recent events. Strategies to target the facades of the most vulnerable buildings need to be tailored for retrofitting and emergency planning. In this research, a novel expeditious vulnerability assessment method, particularly suitable for historical masonry aggregates, is proposed. The method allows assessing the vulnerability index based on information available from external surveys on the building, thus facilitating and speeding up the investigation. If other more precise information (e.g., curbs and tie rods effectiveness) is available, the vulnerability estimation can be improved. The method focuses on out-of-plane mechanisms of the facade, which cause debris to fall on adjacent streets, impeding emergency response. The expeditious method is tailored starting from analytical methods applied on a large sample of historical buildings hit by earthquakes, and validated by means of comparison with kinematic analysis and observed damage state on a relevant case study, Caldarola (Macerata, Central Italy, which was struck by the earthquake in 2016). Results show a good agreement between the proposed method, the kinematic analysis, and the observed damage state of the considered case study, with 75% and 87.5% correspondence, and the method is especially precise for evaluating highly damaged facades.

scholarly journals On the reliability of the equivalent frame models: the case study of the permanently monitored Pizzoli’s town hall

2021 ◽  
Author(s):  
Stefania Degli Abbati ◽  
Paolo Morandi ◽  
Serena Cattari ◽  
Enrico Spacone
Keyword(s):  
Central Italy ◽  
Ambient Vibration ◽  
Second Phase ◽  
Masonry Building ◽  
Town Hall ◽  
Central Italy Earthquake ◽  
Ambient Vibration Tests ◽  
Equivalent Frame ◽  
Comparison Of The Results

AbstractThis paper presents the comparison of the results of modal and nonlinear analyses carried out on a 2-story masonry building with rigid diaphragms, inspired by the Pizzoli’s town hall (AQ, Italy). The case study is one of the Benchmark Structures (labeled BS6) in the “URM nonlinear modelling–Benchmark project” funded by the Italian Department of Civil Protection (DPC) within the framework of the ReLUIS projects. The building has been instrumented since 2009 with a permanent monitoring system by the Osservatorio Sismico delle Strutture (OSS) of the DPC and was hit by the 2016/2017 Central Italy earthquake sequence. In the research first phase, modal and nonlinear static analyses were carried out in a blind prediction, without any preliminary calibration of the models, but referring only to commonly made assumptions on materials and modelling. Five computer programs based on the Equivalent Frame Model (EFM) approach were used. Four different structural configurations were considered: with weak spandrels (A), with tie rods coupled to spandrels (B), with RC ring beams coupled to spandrels (C) and with “shear type” idealization (D). In the research second phase, two of the developed EFMs were calibrated in the elastic range using the results of available Ambient Vibration Tests (AVTs). The models were then validated in the nonlinear range by simulating the dynamic response of the structure recorded during the mainshocks of the 2016/2017 Central Italy earthquake. Recorded and numerical results were compared at both the global and local scale.

scholarly journals UAV DIRECT GEOREFERENCING APPROACH IN AN EMERGENCY MAPPING CONTEXT. THE 2016 CENTRAL ITALY EARTHQUAKE CASE STUDY

2019 ◽  
Vol XLII-2/W13 ◽  
pp. 247-253 ◽  
Author(s):  
F. Chiabrando ◽  
F. Giulio Tonolo ◽  
A. Lingua
Keyword(s):  
Control Point ◽  
Central Italy ◽  
Rapid Mapping ◽  
Central Italy Earthquake ◽  
Local Stakeholders ◽  
Expected Benefits ◽  
High Level ◽  
Nadir Angle ◽  
Kinematic Solution

<p><strong>Abstract.</strong> UAVs platform are increasingly deployed by first responders and local stakeholders to get a first overview of disaster affected areas with a high level of detail and different off-nadir angle configurations. Through a rapid mapping approach, the acquired data (video sequences or pictures) are analysed to extract information on damages to buildings and infrastructures with the goal to support the Search and Rescue operations. The specific focus of the paper is on evaluating the expected benefits (from the rapid mapping perspective) deriving from a direct georeferencing approach when using UAV with RTK capabilities. Specifically, data acquired by a fixed wing eBee RTK platform by SenseFly over the areas affected by the earthquake that hit central Italy in 2016 have been processed to compare the positional accuracies of orthoimagery generated by means of a direct georeferencing approach (without any GPC) with and without a post-processing kinematic solution. The results highlight that an RTK-enabled platform allows to achieve orthoimagery positioning accuracy values up to few centimeters without the need of any control point. In the conclusion session the operational implications of a PPK-based approach versus a standard direct georeferencing are critically discussed.</p>

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