An inter-disciplinary/multi-step approach in defining the input motion for the seismic analysis of masonry buildings struck by the May 29, 2012 M6.0 Emilia earthquake in Northern Italy

2021 ◽  
Vol 140 (3) ◽  
pp. 1-18
Author(s):  
Antonino Famà ◽  
Elisa Zuccolo ◽  
Francesca Bozzoni ◽  
Carlo G. Lai ◽  
Luca Martelli
Keyword(s):  
Seismic Analysis ◽  
Northern Italy ◽  
Masonry Buildings ◽  
Emilia Earthquake ◽  
Input Motion

Seismic Performance of Industrial Sheds and Liquefaction Effects During May 2012 Emilia Earthquakes Sequence in Northern Italy

2014 ◽  
Vol 08 (02) ◽  
pp. 1450009 ◽  
Author(s):  
Gian Paolo Cimellaro ◽  
Marco Chiriatti ◽  
Hwasung Roh ◽  
Andrei M. Reinhorn
Keyword(s):  
Emergency Response ◽  
Working Hours ◽  
Northern Italy ◽  
Seismic Sequence ◽  
Epicentral Area ◽  
Existing Structures ◽  
Industrial Sites ◽  
Emilia Earthquake ◽  
Private Homes ◽  
Seismic Area

On May 20, 2012 at 2:03 UTC, a Mw 6.1 earthquake occurred in Emilia Region of Northern Italy. The event was preceded by a Ml 4.1 foreshock on May 19, 2012 at 23:13 UTC, and followed by several aftershocks, twenty of them with a magnitude Mw greater than 4. The epicentral area of the seismic sequence covers alluvial lowland that is occupied by both agricultural and urbanized areas. Liquefaction effects were observed in several villages on the west side of Ferrara which were built upon former river beds such as the Reno River. The Emilia seismic sequence resulted in 27 casualties, several of whom were among the workers in the factories that collapsed during working hours, and there was extensive damage to monuments, public buildings, industrial sites and private homes. Almost no municipalities hit by 2012 earthquake were classified as seismic area before 2003; therefore, most of the existing structures had been designed without taking in account the seismic actions. The main aims of MCEER field mission was to document the emergency response and the most common damage mechanisms of industrial sheds during Emilia earthquake sequence which are shown and discussed in detail.

scholarly journals The Emilia Earthquake: Seismic Performance of Precast Reinforced Concrete Buildings

2014 ◽  
Vol 30 (2) ◽  
pp. 891-912 ◽  
Author(s):  
Gennaro Magliulo ◽  
Marianna Ercolino ◽  
Crescenzo Petrone ◽  
Orsola Coppola ◽  
Gaetano Manfredi
Keyword(s):  
Seismic Performance ◽  
Seismic Event ◽  
Seismic Vulnerability ◽  
Northern Italy ◽  
Epicentral Zone ◽  
Emilia Earthquake ◽  
Cladding Panels ◽  
Precast Structures ◽  
Epicentral Region ◽  
Extensive Damage

On 20 and 29 May 2012, two earthquakes of MW5.9 and MW5.8 occurred in the Emilia region of northern Italy, one of the most developed industrial centers in the country. A complete photographic report collected in the epicentral zone shows the seismic vulnerability of precast structures, the damage to which is mainly caused by connection systems. Indeed, the main recorded damage is either the loss of support of structural horizontal elements, due to the failure of friction beam-to-column and roof-to-beam connections, or the collapse of the cladding panels, due to the failure of the panel-to-structure connections. The damage can be explained by the intensity of the recorded seismic event and by the exclusion of the epicentral region from the seismic areas recognized by the Italian building code up to 2003. Simple considerations related to the recorded acceleration spectra allow motivating the extensive damage due to the loss of support.

scholarly journals Eliminating Conservatism in the Piping System Analysis Process Through Application of a Suite of Locally Appropriate Seismic Input Motions

2009 ◽  
Author(s):  
Anthony L. Crawford ◽  
Robert E. Spears ◽  
Mark J. Russell
Keyword(s):  
System Analysis ◽  
Seismic Analysis ◽  
Interaction Analysis ◽  
Department Of Energy ◽  
Piping System ◽  
Total Uncertainty ◽  
Seismic Input ◽  
Nuclear Systems ◽  
Computationally Intensive ◽  
Input Motion

Seismic analysis is of great importance in the evaluation of nuclear systems due to the heavy influence such loading has on their designs. Current Department of Energy seismic analysis techniques for a nuclear safety-related piping system typically involve application of a single conservative seismic input applied to the entire system [1]. A significant portion of this conservatism comes from the need to address the overlapping uncertainties in the seismic input and in the building response that transmits that input motion to the piping system. The approach presented in this paper addresses these two sources of uncertainty through the application of a suite of 32 earthquake realizations with equal probability of occurrence whose collective performance addresses the total uncertainty while each individual motion represents a single variation of it. It represents an extension of the soil-structure interaction analysis methodology of SEI/ASCE 43-05 [2] from the structure to individual piping components. Because this approach is computationally intensive, automation and other measures have been developed to make such an analysis efficient. These measures are detailed in this paper.

Seismic Analysis Approach Applied to a Small Size Next Generation Nuclear Reactor

2008 ◽  
Author(s):  
G. Forasassi ◽  
R. Lo Frano
Keyword(s):  
Nuclear Power ◽  
Nuclear Reactor ◽  
Seismic Analysis ◽  
Methodological Approach ◽  
Free Field ◽  
Time History ◽  
Future Generation ◽  
Energy System ◽  
Ground Acceleration ◽  
Input Motion

The aim of the paper is to evaluate the behaviour of a Near Term nuclear energy system example with reference to IRIS (International Reactor Innovative and Safety) project. As it is well known the development of new and future-generation nuclear power plant (Gen IV NPP) is strictly related to the sustainability, safety and reliability as well as to the proliferation resistance. In this paper, the safety aspects related to the effects of a severe earthquake (Safe Shutdown Earthquake) as well as to the induced loads are treated by means the Substructure and Time History Approaches, assuming a free field Peak Ground Acceleration equal to 0.3 g as input motion. The analyses and upgrading of the geometry structures with highest probability of criticality are performed on rather complex and detailed 3D finite element (FE) models. The main goals were: the evaluation of the dynamic characteristics of each considered structure, the verification of the load bearing structures in order to obtain a preliminary assessment of the adopted methodological approach and structural models. The analyses results and dynamic response of internal components (e.g. Nuclear Buildings, etc.) seem to confirm the possibility to upgrade the geometry and the performances of the proposed design choices.

Development of a Novel V-D Strut Model for Seismic Analysis of Confined Masonry Buildings

2021 ◽  
Vol 147 (3) ◽  
pp. 04021001
Author(s):  
Bonisha Borah ◽  
Hemant B. Kaushik ◽  
Vaibhav Singhal
Keyword(s):  
Seismic Analysis ◽  
Masonry Buildings ◽  
Confined Masonry
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