Seismic vulnerability assessment form for free-standing columns based on a simplified numerical analysis

Pappas, Athanasios; Porto, Francesca da; Modena, Claudio

doi:10.1080/15583058.2015.1113336

Cited by 15 publications

(26 citation statements)

References 21 publications

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“…Hence, after the earlier 1 and the following analytical studies 2-6 (among others), referring to or based on the dynamics of rigid blocks, the research has been directed to experimental investigations [7][8][9][10] and, much more, to numerical studies, focused on the subject. [11][12][13][14][15][16][17] In several cases, the behavior of ancient columns was studied as part of wider approaches related, usually, with ongoing restoration projects of ancient monuments. [18][19][20][21][22][23] Analytical approaches published in the recent years should also be mentioned.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of the seismic response of ancient columns

Papadopoulos

Vintzileou

Psycharis

2019

Earthq Engng Struct Dyn

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Summary This paper presents a numerical study of the response to earthquake actions of eight ancient Greek multidrum columns, which were chosen as representative of a broad spectrum of the ancient columns preserved to date. The study was conducted using the FE software Abaqus, in three steps. At first, the software efficiency to predict the rocking response of dry‐stone structures was verified. Afterwards, various numerical models of one typical ancient multidrum column were seismically excited. Records of four real earthquakes differing in frequency content were used for the excitation of the models. Each column model was different from the others at least in one geometric or modeling parameter. Although the examined parameters affected the numerical results, their variation did not alter significantly the overall behavior of the column. In the last step of the study, numerical models of eight columns were seismically excited using four seismic records. In these analyses, among the simulation approaches tested in the second step, the simpler one was adopted. On the basis of the numerical results, conclusions were drawn regarding the seismic resistance of the columns and its correlation with the dynamic characteristics of the columns (size, slenderness, and frequency parameter) and with the basic intensity measures and frequency content indicator of the seismic motions (PHA, PHV, PHD, and Tg). Thus, criteria of seismic collapse for the multidrum columns are proposed, which can be used for the approximate assessment of the seismic vulnerability of free‐standing ancient columns, provided that the columns are in good preservation state.

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Section: Introductionmentioning

confidence: 99%

Finite element analysis of the seismic response of ancient columns

Papadopoulos

Vintzileou

Psycharis

2019

Earthq Engng Struct Dyn

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“…This work demonstrated that seismic records characterised by low frequency velocity pulses produce a similar rocking response despite of a significantly varying PGA. Many studies however, (Psycharis et al 2000;Papantonopoulos et al 2002;Psycharis et al 2003;Papaloizou and Komodromos 2009;Yagoda-Biran and Hatzor 2010;Dimitri et al 2011;Pappas et al 2016) focused on the seismic vulnerability of rocking bodies using only the PGA as IM, while in recent works (Psycharis et al 2013) a comparison between PGA and PGV was also attempted for assessing their reliability in expressing ground motion intensity. All studies mentioned above are effectively in agreement with the early proposal of Yim et al (1980) according to which, it is necessary to adopt a probabilistic approach to study rocking behaviour.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of alternative intensity measures for the seismic assessment of monolithic free-standing columns

Pappas

Sextos

Porto

et al. 2016

Bull Earthquake Eng

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This paper deals with the dynamic response of a free-standing ancient column in the Roman Agora of Thessaloniki, Greece as a means to shed more light on the complex behaviour of rocking bodies under seismic excitation. Numerical analyses utilizing discrete element method were carried out with the use of multiple seismic records selected based on the disaggregation of the seismic hazard for the region of interest. To identify their impact on structural performance, earthquake Intensity Measures, such as Peak Ground Acceleration and Peak Ground Velocity are examined for the case of a column that sustained no visible permanent deformations during the Ms = 6.5 Thessaloniki earthquake of 1978. The analysis revealed a weak correlation of PGA and PGV with the response results and a significant influence of the mean frequency (f m ) of the seismic motion. No coupling was found between the maximum displacement of the top during the oscillation and the permanent post-seismic deformations. The complementarity of both earthquake Intensity Measures in the structural vulnerability assessment is also depicted.

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“…The study of the seismic behavior of ancient Greek and Roman columns is of particular interest due to the significant seismic activity of the Eastern Mediterranean area [4]. Such studies were typically developed in technical literature according to three main approaches: (i) analytical [3,[5][6][7][8], (ii) numerical, with the use of a software [2,4,[9][10][11][12][13][14][15][16][17][18][19], or (iii) experimental [20,21]. The dynamic behavior of a multidrum free-standing column is controlled by rocking, sliding or a combination of the two mechanisms of the single drums or groups of them.…”

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confidence: 99%

“…This seismic response is complex and highly non-linear [2,4]. Therefore, theoretical approaches initially involved analytical studies based on simplifying assumptions following the landmark study of G. W. Housner [5] and considered single and multiple block structures [3,[5][6][7][8]; then, recent studies were mainly developed with numerical methods [2,4,[9][10][11][12][13][14][15][16][17][18][19]. These studies found that the seismic response of such elements is sensitive to the geometrical parameters of the columns, as well as to the material elastic properties, the coefficient of friction and the amplitude and frequency of the seismic action.…”

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confidence: 99%

Multidrum Stone Columns at the Pompeii Archaeological Site: Analysis of Geometrical Properties and State of Preservation

et al. 2020

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The seismic vulnerability of ancient free-standing multidrum stone columns is an important issue for the preservation of Greek and Roman archaeological sites. Such elements show a complex and highly non-linear dynamic behavior, requiring specific and sophisticated structural analysis. Different numerical studies on the dynamic behavior of ancient multidrum stone columns found that their seismic response is sensitive to their geometrical parameters, as well as to the material elastic properties, the kinetic coefficient of friction and the amplitude and frequency of the seismic action. Therefore, in the present research, a detailed survey of free-standing multidrum stone columns representative of a wide range of elements at the Pompeii Archaeological site was developed to provide a primary evaluation of the seismic vulnerability of such elements based on their geometrical properties. The study focuses on 103 multidrum grey-tuff columns, from four areas at the site: tetrastyle atrium of Casa del Fauno at Regio VI and Quadriportico dei Teatri, Foro Triangolare and Palestra Sannitica at Regio VIII. Grey tuff was a typically locally sourced natural stone, used as a building material in ancient Pompeii. The research areas included both private (Casa del Fauno) and public buildings (Quadriportico dei Teatri, Foro Triangolare and Palestra Sannitica). The mean overall geometrical properties affecting the seismic behavior of the columns in each research area and the discussion of the collected results are herein presented.

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Seismic vulnerability assessment form for free-standing columns based on a simplified numerical analysis

Cited by 15 publications

References 21 publications

Finite element analysis of the seismic response of ancient columns

Finite element analysis of the seismic response of ancient columns

Efficiency of alternative intensity measures for the seismic assessment of monolithic free-standing columns

Multidrum Stone Columns at the Pompeii Archaeological Site: Analysis of Geometrical Properties and State of Preservation

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