scholarly journals Seismic response of a masonry church in Central Italy: the role of interventions on the roof

2020 ◽  
Author(s):  
Gessica Sferrazza Papa ◽  
Vito Tateo ◽  
Maria Adelaide Parisi ◽  
Siro Casolo
Keyword(s):  
Seismic Response ◽  
Central Italy ◽  
Strong Motion ◽  
Element Model ◽  
Structural Elements ◽  
Structural Interventions ◽  
Medieval Church ◽  
The Church ◽  
The Finite Element Model

Abstract The seismic response of a medieval church in Central Italy is analyzed considering the two roof configurations, i.e., reinforced concrete and timber roofs, that the church had in different periods of its existence. Structural interventions and changes are common in the churches of this territory, where frequent earthquakes put these buildings at risk. The church studied here, St. Salvatore in Acquapagana (Serravalle di Chienti, province of Macerata), was damaged by the 1997 Umbria-Marche and the 2016 Central Italy earthquakes. Between these two seismic events, the church was repaired, and the concrete roof was substituted with a lighter timber roof. To investigate the influence of this change on the seismic response, a study was performed at the building and façade macroelement scales using the finite element model and rigid body spring model, respectively. For each approach, the two roof configurations were considered, and two strong motion records, from September 26, 1997, and October 30, 2016, were applied. The results show that the concrete roof improves the box-like behavior, but it increases the vulnerability of the masonry structures, characterized by a limited tensile strength. Conversely, in the timber roof configuration, the most vulnerable areas of the structure are the intersections between structural elements.

scholarly journals The Role of the Finite Element Model in Dental Implants

2000 ◽  
Vol 26 (2) ◽  
pp. 77-81 ◽  
Author(s):  
Daniel H. DeTolla ◽  
Sebastiano Andreana ◽  
Abani Patra ◽  
Robert Buhite ◽  
Brandon Comella
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Dental Implants ◽  
Element Model ◽  
The Finite Element Model

Damage Assessment of San Francesco Church in Amandola Hit by Central Italy 2016-2017 Seismic Event

2019 ◽  
Vol 817 ◽  
pp. 627-633
Author(s):  
Ersilia Giordano ◽  
Angela Ferrante ◽  
Elisa Ribilotta ◽  
Francesco Clementi ◽  
Stefano Lenci
Keyword(s):  
Seismic Event ◽  
Global Analysis ◽  
Central Italy ◽  
Element Model ◽  
Constitutive Law ◽  
Nonlinear Static Analysis ◽  
Local Analysis ◽  
Marche Region ◽  
Nonlinear Static ◽  
The Church

Italy is a high seismic risk country since 1900 more than 30 earthquakes with magnitude greater than Mw=5.8 have occurred, and the last one is the Central Italy seismic sequence. The first shock occurred in the 24 August (Mw=6.2) followed by another stronger quake in the 30th October (Mw=6.5). It hit the regions of Marche, Umbria, and Abruzzo heavily causing many deaths, injuries and extensive damages on the cultural heritage. This paper analyses the church of San Francesco in Amadola, located in the Marche region that has been considered condemned for the severe damages reported after these earthquakes. The church is globally analyzed by the application of nonlinear static analysis on a Finite Element Model where the nonlinearity of masonry is taking into account with a proper constitutive law. The study wants to prove how global analysis combined by the local analysis can reproduce the behavior of this structure during a quake, showing that it can repeat the real damages produced by earthquakes.

The Parametric Analysis of the Threshold Value Judging Mechanism in MEMS Safety and Arming Device

2015 ◽  
Vol 645-646 ◽  
pp. 968-971
Author(s):  
Fu Fu Wang ◽  
Wen Zhong Lou ◽  
Fang Yi Liu ◽  
Da Kui Wang ◽  
Ming Rong Zhang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Threshold Value ◽  
Element Model ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Long Distance ◽  
And Control ◽  
The Mathematical Model ◽  
The Finite Element Model

In this paper, a mechanical MEMS S&A device has been proposed. The size of the device is 10mm×13mm×0.5mm. The role of the threshold value judging mechanism is to determine the environment suffered by centrifugal force and control the sub-centrifugal slider not movement under the threshold, so as to effectively guarantee the time of long-distance arming. Through establishing the three-dimensional model of threshold value judging mechanism, establishing the force and the parameters of locking-releasing mechanism, deriving the mathematical model according to the rigid dynamic mechanics theory and establishing the finite element model by using ANSYS/LS-DYNA, appropriate threshold value judging mechanism is designed to meet two items, one item is the deformation of threshold value rod is not enough to release sub-centrifugal slider when the speed is less than 60000r/min; the other item is deformation of threshold value rod can release sub-centrifugal slider when the speed is more than 60000r/min.

scholarly journals Comfort through ‘the lively Word of God’: Katherine Willoughby and the Protestant Funeral Monument

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Eva Lauenstein
Keyword(s):  
Preliminary Investigation ◽  
Word Of God ◽  
Spatial Presence ◽  
Protestant Church ◽  
Medieval Church ◽  
The Reformation ◽  
Church Building ◽  
Visual Impact ◽  
The Church

What does the use of biblical scripture, viewed through the funeral monument’s material and spatial presence in the church building disclose about the role of the places for the dead in establishing and maintaining church practices and ritual during the formative years of the Reformation? Taking the lead from the tomb of early evangelical reformer Katherine Willoughby, Duchess of Suffolk at Spilsby in Lincolnshire, this article examines the relationship between text, space and materiality in the formulation of a protestant rhetoric of congregational equality with its epicentre in the church nave. Tracing the texts and placements of commemorative structures, and their relationship to official as well as more radical protestant texts, including the Elizabethan Injunctions (1559), as well as the writing of John Dod (1615), this preliminary investigation explores the fertile relationship between object and text in the development of Protestant identities.By applying recent archaeological scholarship into the role of ‘presencing’ mechanisms (Graves 2000, & Roffey, 2008) in the medieval and post-medieval church interior to the Willoughby monument in Spilsby’s north chancel, as well as two further examples of the tombs of protestant reformers, the notion of a protestant dismissal of the visual as a tool in devotion will be challenged. By introducing the central role of placement, the approach will destabilize the view that in the protestant church ‘the greatest visual impact came from words’ (MacCulloch, 1999, p. 159), and instead, place language into the wider architectural and spatial narratives of the church interior.

scholarly journals Formulation of Performance Levels and Relevant Limitations for Clay Brick Masonry Infills in Seismic Analysis of R/C Frame Structures

2021 ◽  
Vol 1203 (3) ◽  
pp. 032043
Author(s):  
Iacopo Costoli ◽  
Stefano Sorace ◽  
Gloria Terenzi
Keyword(s):  
Seismic Response ◽  
Seismic Analysis ◽  
Central Italy ◽  
Time History ◽  
Element Model ◽  
Brick Masonry ◽  
Frame Structures ◽  
Hysteretic Model ◽  
Backbone Curve ◽  
Plane State

Abstract Observation of damage caused by recent earthquakes highlights, once again, that the presence of infills significantly affects the seismic response of reinforced concrete (R.C.) frame buildings. Therefore, in spite of the fact that infills are non-structural elements, and thus they are normally not considered in structural analyses, in many cases their contribution should not be neglected. Based on these observations, the study proposed in this paper consists in the evaluation of the seismic response of infills in time-history finite element analyses of R.C. frame structures by means of a two-element model, constituted by two diagonal nonlinear beams. A “concrete”-type hysteretic model predicts the in-plane state of infills, through a force-displacement backbone curve expressly generated, and scanned in terms of performance limits, to this aim. This model is demonstratively applied to a real case study, i.e. a R.C. frame building including various types of brick masonry perimeter infills and internal partitions, damaged by the 30 October 2016 Central Italy earthquake. The time-histories seismic analyses carried out on it allows checking the influence of infills on the response of the structure, as well the effectiveness of the proposed model in reproducing the observed real damage on the masonry panels.

Redesign of a dissipative bracing-based retrofit intervention for an earthquake damaged school building

2021 ◽  
Author(s):  
Gloria Terenzi ◽  
Iacopo Costoli ◽  
Stefano Sorace
Keyword(s):  
Central Italy ◽  
Time History ◽  
Element Model ◽  
Elastic Response ◽  
School Building ◽  
Structural Members ◽  
Reinforced Concrete Structure ◽  
Fluid Viscous Dampers ◽  
Central Italy Earthquake ◽  
The Finite Element Model

<p>A school building with reinforced concrete structure, seismically retrofitted in 2013 and damaged by the 2016 Central Italy earthquake, is examined in this paper. A time-history assessment analysis is initially carried out in pre-rehabilitated conditions by simulating also the presence of the clay brick masonry infill perimeter walls and partitions in the finite element model of the structure. Based on the results of this analysis, a different retrofit solution is proposed, consisting in the incorporation of dissipative braces equipped with pressurized fluid viscous dampers. The verification analyses developed in this new configuration for the main shock records of the 2016 earthquake highlight slightly damaged and easily repairable response conditions of a little number of partitions — instead of the diffused moderate-to-severe damage surveyed in the building internal and perimeter infills</p><p>— and an elastic response of structural members.</p>

Evaluation of the seismic response at the Arquata Del Tronto hamlet through 3D numerical analyses

2020 ◽  
Author(s):  
Ilaria Primofiore ◽  
Julie Marie-Pierre Baron ◽  
Giovanna Laurenzano ◽  
Peter Klin ◽  
Cristina Muraro ◽  
...  
Keyword(s):  
Seismic Response ◽  
Earthquake Engineering ◽  
Site Response ◽  
Central Italy ◽  
Seismic Microzonation ◽  
Numerical Analyses ◽  
Topographic Effects ◽  
Ground Response ◽  
Relevant Role

&lt;p&gt;&lt;sub&gt;([email protected]; &lt;/sub&gt;&lt;sub&gt;[email protected]; [email protected]; [email protected]; &lt;/sub&gt;&lt;sub&gt;[email protected]; [email protected])&lt;/sub&gt;&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;The 2016 Italian seismic sequence showed, once again, the relevant role of the differentiated seismic effects at short distance in varied geological environments. In the case study of Arquata del Tronto hamlet, several response analyses have been performed in order to reproduce the ground response through 2D finite element numerical codes (Primofiore, 2019; Pagliaroli et al., 2019). According to the Italian Guidelines for Seismic microzonation ICMS (2010), in the case of hills, the topographic effects of seismic amplification must be studied by numerical methods. In those cases, when the relieves are made up of soil deposits, 2D numerical analyses are used, indeed. Instead, when rocky hills are considered, the amplification effects due to the topography are considered by means of 1D simplified analyses or at most, 2D ground response analyses. The recent damages of old settlements located on the top of rocky hills, such as Arquata del Tronto hill, put in evidence the relevant role of three-dimensional movements of asymmetrical isolated rocky reliefs in generating heavy disruptions during the seismic shaking. In addition, on surface there are commonly fracturing layers of rocks, which played an important role in amplifying seismic waves according to their thicknesses. 3D numerical analyses at Arquata del Tronto hill have been carried out through the spectral element method implemented in SPECFEM3D code. Results suggested that an accurate simulation of the topographic effects of isolated asymmetrical rocky hills can be appreciated only through 3D numerical analyses, because they capture the out-of-plane bending moment (torsional effect) that asymmetry induces. The results showed that seismic behaviour of articulated morphology of the isolated relieves cannot be simulated by means of 2D seismic response analyses.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;&lt;sub&gt;References&lt;/sub&gt;&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;&lt;sub&gt;Pagliaroli, A., Pergalani, F., Ciancimino, A., et al. (2019). Site response analyses for complex geological and morphological conditions: relevant case-histories from 3rd level seismic microzonation in Central Italy. &lt;/sub&gt;&lt;/p&gt;&lt;p&gt;&lt;sub&gt;Bulletin of Earthquake Engineering, 1-37.&lt;/sub&gt;&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;&lt;sub&gt;Primofiore, I. (2019). Studio della risposta sismica in localit&amp;#224; Arquata del Tronto mediante modellazioni numeriche 3D. Master Degree thesis (in Italian), University &amp;#8220;G. d&amp;#8217; Annunzio&amp;#8221; of Chieti-Pescara.&lt;/sub&gt;&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;&lt;sub&gt;Working group M. S. (2010). ICMS - Indirizzi e Criteri per la Microzonazione Sismica. In Conferenza delle Regioni e delle Provincie autonome. Dipartimento della protezione civile, Roma (Vol. 3).&lt;/sub&gt;&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;

Damping Value for Seismic Response Analysis of Long-Span Bridges

2011 ◽  
Vol 90-93 ◽  
pp. 1522-1525
Author(s):  
Ling Ling Yu
Keyword(s):  
Seismic Response ◽  
Dynamic Properties ◽  
Element Model ◽  
Response Analysis ◽  
Seismic Response Analysis ◽  
Long Span Bridges ◽  
Rayleigh Damping ◽  
Long Span ◽  
Damping Theory ◽  
The Finite Element Model

The current problems on damping in seismic response analysis of bridges is presented. The Rayleigh damping theory is simply introduced in this paper. Taking the Longtan River Bridge for instance, the finite element model of Longtan River Bridge (left line) is established. Then, the dynamic properties of the bridge is analyzed. Based on this, the Rayleigh damping constants and in an ANSYS dynamic analysis are obtained.

scholarly journals Det befolkade rummet: Relikfyndet från Torsken kyrka

Nordlit ◽  
2015 ◽  
pp. 261 ◽  
Author(s):  
Lena Liepe
Keyword(s):  
Essential Feature ◽  
Precious Metals ◽  
Late Medieval ◽  
Son Of Man ◽  
Medieval Church ◽  
Medieval Liturgy ◽  
Point Of Departure ◽  
The Church

<p>Taking its point of departure in the finding of a bag of relics tucked away under the chin of a late medieval wooden Christ figure from Torsken Church, Senja, this essay discusses relics as an essential feature of the medieval church room. Through the relics – deposited in the sepulchres of the altars, encased in reliquaries made from precious metals or, as in the case of the Torsken crucifix, contained within wooden cult images – the saints became present and accessible as addressees of intercessions. The role of relics in medieval liturgy and devotion is accounted for, and the oscillation between visibility and invisibility, reality and representation, as played out by the Torsken crucifix with its relics, is explored. The visible, “realistic” or life-like figure of Christ is a mere representation, a manufactured similitude of the Son of Man, whereas it is the relics, hidden away in the bag, that manifest the actual presence of the higher, invisible but nevertheless true divine reality in the church room.</p>

scholarly journals Analysis on Dynamic Characteristics and Seismic Response of Wooden Structure of South Gate Building in Jiangzhang Town

2022 ◽  
Vol 2148 (1) ◽  
pp. 012046
Author(s):  
Xiancai Ren ◽  
Zhaobo Meng ◽  
Xin Wang ◽  
Feifei Gao ◽  
Ting Zhang
Keyword(s):  
Seismic Response ◽  
Element Model ◽  
Shanxi Province ◽  
Response Analysis ◽  
Acceleration Response ◽  
The South ◽  
Response Curves ◽  
Tower Model ◽  
Wooden Structures ◽  
The Finite Element Model

Abstract In order to study the seismic performance of ancient wooden structures with single eaves and beam lifting in China, the finite element model of the upper floor of the south gate of Jiangzhang town in Shanxi Province was established by using ANSYS. Through modal analysis, the main frequencies and modes of the south gate of Jiangduan were obtained. Through the seismic response analysis of the south gate tower model, the displacement and acceleration response curves of the top nodes of the outer eaves column, golden column and through column under various working conditions of the South gate tower are obtained. The results show that the first and second order frequencies of the South Gate tower model are 1.830Hz and 1.855Hz, and the first two order modes are mainly transitional. With the increase of seismic excitation, the displacement and acceleration response of the top joints of the outer eave column, golden column and through column increase.

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