scholarly journals Modeling earthquake effects on groundwater levels: evidences from the 2012 Emilia earthquake (Italy)

Geofluids ◽  
2015 ◽  
Vol 16 (3) ◽  
pp. 452-463 ◽  
Author(s):  
M. Nespoli ◽  
M. Todesco ◽  
E. Serpelloni ◽  
M. E. Belardinelli ◽  
M. Bonafede ◽  
...  
Keyword(s):  
Groundwater Levels ◽  
Emilia Earthquake ◽  
2012 Emilia Earthquake ◽  
Earthquake Effects

scholarly journals Preliminary results of ground-motion characteristics

2012 ◽  
Vol 55 (4) ◽  
Author(s):  
Francesca Bozzoni ◽  
Carlo Giovanni Lai ◽  
Laura Scandella
Keyword(s):  
Ground Motion ◽  
Site Response ◽  
Response Spectrum ◽  
Field Tests ◽  
Response Spectra ◽  
Ground Acceleration ◽  
Preliminary Results ◽  
Emilia Earthquake ◽  
Particle Orbit ◽  
2012 Emilia Earthquake

The preliminary results are presented herein for the engineering applications of the characteristics of the ground motion induced by the May 20, 2012, Emilia earthquake. Shake maps are computed to provide estimates of the spatial distribution of the induced ground motion. The signals recorded at the Mirandola (MRN) station, the closest to the epicenter, have been processed to obtain acceleration, velocity and displacement response spectra. Ground-motion parameters from the MRN recordings are compared with the corresponding estimates from recent ground-motion prediction equations, and with the spectra prescribed by the current Italian Building Code for different return periods. The records from the MRN station are used to plot the particle orbit (hodogram) described by the waveform. The availability of results from geotechnical field tests that were performed at a few sites in the Municipality of Mirandola prior to this earthquake of May 2012 has allowed preliminary assessment of the ground response. The amplification effects at Mirandola are estimated using fully stochastic site-response analyses. The seismic input comprises seven actual records that are compatible with the Italian code-based spectrum that refers to a 475-year return period. The computed acceleration response spectrum and the associated dispersion are compared to the spectra calculated from the recordings of the MRN station. Good agreement is obtained for periods up to 1 s, especially for the peak ground acceleration. For the other periods, the spectral acceleration of the MRN recordings exceeds that of the computed spectra.<br />

Innovative Suspended Superstructure for the Retrofitting of a Steel Truss Railway Bridge

2018 ◽  
Vol 763 ◽  
pp. 1121-1128
Author(s):  
Marco Mezzi ◽  
Gianluca Nestovito ◽  
Paolo Petrella ◽  
Vincenzo Cefaliello
Keyword(s):  
National Standard ◽  
Railway Network ◽  
Fluvial Erosion ◽  
Railway Line ◽  
Load Models ◽  
Emilia Earthquake ◽  
Structural Capacity ◽  
Railway System ◽  
2012 Emilia Earthquake ◽  
Suspended Bridge

The bridge in Poggio Renatico crossing the Reno river on the railway line between Bologna and Ferrara, consists of steel decks supported by masonry abutments and piers, while foundations and pier caps are made of reinforced concrete. After the 2012 Emilia Earthquake and accounting for the fluvial erosion below the piers foundations, a structural assessment of the bridge was carried out in accordance with to the current Italian rules. Although a sufficient structure capacity against the actual transit loads resulted, the bridge showed some inadequacies with respect to the load models provided by both the national standard for constructions and the guidelines of the Italian railway network company. The retrofitting project consists of an improvement of the structural capacity of all the elements: girders, piers and abutments. An innovative retrofitting solution provides for the strengthening of the existing decks through a suspension system of cables anchored to steel towers standing on both abutments and piers and creating a kind of suspended bridge. The retrofitting is compatible with the normal scheduled interruptions of the rail traffic thereby reducing the maintenance costs of the railway system. The structural solution represents a model easily replicable to solve analogous situations along the railway network.

Damage assessment of fortresses after the 2012 Emilia earthquake (Italy)

2013 ◽  
Vol 12 (5) ◽  
pp. 2333-2365 ◽  
Author(s):  
Serena Cattari ◽  
Stefania Degli Abbati ◽  
Daniele Ferretti ◽  
Sergio Lagomarsino ◽  
Daria Ottonelli ◽  
...  
Keyword(s):  
Damage Assessment ◽  
Emilia Earthquake ◽  
2012 Emilia Earthquake

A peak acceleration threshold for soil liquefaction: lessons learned from the 2012 Emilia earthquake (Italy)

2014 ◽  
Vol 74 (2) ◽  
pp. 1069-1094 ◽  
Author(s):  
Filippo Santucci de Magistris ◽  
Giovanni Lanzano ◽  
Giovanni Forte ◽  
Giovanni Fabbrocino
Keyword(s):  
Soil Liquefaction ◽  
Lessons Learned ◽  
Peak Acceleration ◽  
Emilia Earthquake ◽  
Acceleration Threshold ◽  
2012 Emilia Earthquake

scholarly journals Latest Findings on the Behaviour Factor q for the Seismic Design of URM Buildings

2021 ◽  
Author(s):  
Paolo Morandi ◽  
Christoph Butenweg ◽  
Khaled Breis ◽  
Katrin Beyer ◽  
Guido Magenes
Keyword(s):  
Seismic Design ◽  
Structural Damage ◽  
Design Method ◽  
Masonry Buildings ◽  
Behaviour Factor ◽  
Emilia Earthquake ◽  
Standard Design ◽  
Seismic Design Method ◽  
Recent Earthquakes ◽  
2012 Emilia Earthquake

Abstract Recent earthquakes as the 2012 Emilia earthquake sequence showed that recently built unreinforced masonry (URM) buildings behaved much better than expected and sustained, despite the maximum PGA values ranged between 0.20 - 0.30g, either minor damage or structural damage that is deemed repairable. Especially low-rise residential and commercial masonry buildings with a code-conforming seismic design and detailing behaved in general very well without substantial damages. The low damage grades of modern masonry buildings that was observed during this earthquake series highlighted again that codified design procedures based on linear analysis can be rather conservative. Although advances in simulation tools make nonlinear calculation methods more readily accessible to designers, linear analyses will still be the standard design method for years to come. The present paper aims to improve the linear seismic design method by providing a proper definition of the q-factor of URM buildings. These q-factors are derived for low-rise URM buildings with rigid diaphragms which represent recent construction practise in low to moderate seismic areas of Italy and Germany. The behaviour factor components for deformation and energy dissipation capacity and for overstrength due to the redistribution of forces are derived by means of pushover analyses. Furthermore, considerations on the behaviour factor component due to other sources of overstrength in masonry buildings are presented. As a result of the investigations, rationally based values of the behaviour factor q to be used in linear analyses in the range of 2.0 to 3.0 are proposed.

Interpreting the deformation phenomena of a levee damaged during the 2012 Emilia earthquake

2019 ◽  
Vol 124 ◽  
pp. 389-398 ◽  
Author(s):  
Anna Chiaradonna ◽  
Giuseppe Tropeano ◽  
Anna d’Onofrio ◽  
Francesco Silvestri
Keyword(s):  
Emilia Earthquake ◽  
2012 Emilia Earthquake

Recent Developments in F.E. Analysis of FRP Reinforced Masonry Vaults: Case Studies in Italy

2014 ◽  
Vol 624 ◽  
pp. 389-396 ◽  
Author(s):  
Gabriele Milani ◽  
Antonio Tralli
Keyword(s):  
Case Studies ◽  
Limit Analysis ◽  
Piecewise Constant Function ◽  
Emilia Earthquake ◽  
Structural Deterioration ◽  
First Case ◽  
Reinforced Masonry ◽  
Non Linear ◽  
Masonry Vaults ◽  
2012 Emilia Earthquake

Aim of the present paper is the analysis of a series of existing masonry cross vaults exhibiting meaningful structural deterioration and diffused crack patterns, by means of an advanced non-linear and limit analysis software. The approach utilized is a non-standard and non-commercial one and bases both for the non-linear and limit analysis procedure on a FE discretization of the domain by means of rigid infinitely resistant wedges, where all the non-linearity is concentrated on interfaces between adjoining elements [1-3]. When dealing with the non-linear code, a sequential quadratic programming scheme is used at each iteration in order to deal with the deterioration of mechanical properties of interfaces, provided that the actual non-linear behavior is approximated by means of a linear piecewise constant function. Some real case studies of historic buildings in Italy are discussed. The first case study is represented by the structural analysis of a series of existing masonry cross vaults constituting the roof system of the ground floor of the former Caserma Lorenzini (ex Convent of S. Lorenzo) in Lucca, Italy, at the moment subjected to a wide restoration intervention within the so called Piuss project. The second is represented by the cross vaults of a 12th century masonry sighting tower damaged by the 20th may 2012 Emilia earthquake. This medieval tower, called Torre Fornasini, is located in the municipality of Poggio Renatico, about 10 km from Ferrara.

Sign in / Sign up

Export Citation Format

Share Document