Near- and far-field earthquake damage study of the Konitsa stone arch bridge

Simos, N.; Manos, George C.; Kozikopoulos, Evaggelos

doi:10.1016/j.engstruct.2018.09.072

Cited by 28 publications

(20 citation statements)

References 18 publications

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“…This difficulty is due to the immense variability of old stone masonry in terms of materials and construction techniques and the subsequent lack of relevant in-situ or laboratory measurements. Recordings of the dynamic response of a particular structure from in-situ man-made excitations can be utilized in order to validate a given numerical simulation [6,7]. During the past decade, numerous researchers have proposed the application of complex numerical simulations for predicting the performance of old stone masonry structures like then ones investigated here.…”

Section: Observed Structural Performance For a Long Period Rangementioning

confidence: 99%

“…Stone masonry bridges are another structural type that suffer from foundation settlement [5]. In this case, foundation deformability, which results from long term river flow or short term turbulent river flow from flooding, also leads to the collapse of such stone masonry structures [6,7]. The worst case scenario for the various masonry structural elements is the accumulation of stress and strain from such long term effects and the absence of any appropriate counter-measures.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Performance of Unreinforced Stone Masonry Greek “Basilica” Churches When Subjected to Seismic Forces and Foundation Settlement

2019

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Unreinforced stone masonry made of low strength mortar has been used for centuries in forming old type stone masonry churches of the “Basilica” typology. The seismic performance of such stone masonry structures damaged during recent strong seismic activity in Greece, combined with long term effects from foundation settlement, is presented and discussed. A simplified numerical process is presented for evaluating the performance of such damaged stone masonry structures, making use of linear and non-linear numerical tools and assumed limit-state failure criteria. In order to obtain a quantification of the in-plane sliding shear failure criterion, a number of stone masonry wallets were built with weak mortar and were tested in the laboratory. Through the comparison of the obtained numerical predictions with the observed structural behaviour for selected cases of stone masonry “Basilica” churches, the validity of the applied simplified numerical process is demonstrated. It is shown that reasonable approximation of the observed performance of such structures can be obtained when the assumed failure criteria are realistic.

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Section: Observed Structural Performance For a Long Period Rangementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of the Performance of Unreinforced Stone Masonry Greek “Basilica” Churches When Subjected to Seismic Forces and Foundation Settlement

2019

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“…This fact combined with the resistance offered to this wind component by the façade of each bridge produced sufficient excitation source resulting in small amplitude vibrations that could be recorded by the employed instrumentation. The second type of excitation that was employed, namely vertical in-plane excitation, was produced from a sudden drop of a weight on the deck of each stone masonry bridge [6], [7], [23], [24]. The level of this second type of excitation was capable of producing mainly vertical vibrations; however, depending on the location of the stone-bridge that such an excitation was applied, horizontal vibratory response components could also be recorded.…”

Section: In-situ Measurements Of the Dynamic Characteristics Of The Smentioning

confidence: 99%

“…This process is presented in what follows for two old masonry bridges, namely the Saint Vissariona Bridge at Pile, in Trikala prefecture and the bridge of Aziz-Aga, at Grevena prefecture. All the obtained data were subsequently studied in the frequency domain through available FFT software [1], [4], [5], [6], [7], [23], 24]. In figure 4, the out-of-plane horizontal component response of the Saint Vissariona stone bridge is depicted together with the corresponding FFT plot.…”

Section: In-situ Measurements Of the Dynamic Characteristics Of The Smentioning

confidence: 99%

“…The lack of specific studies towards clarifying in a systematic way all these uncertainties represents a serious limitation in the numerical simulation process. The approximation adopted in this study is a process of back simulation [6], [7], [23], [24]. This is done by adopting values for these unknown mechanical stone masonry properties, respecting at the same time all the measured geometric details, which result in reasonably good agreement between the measured and predicted in this way eigen-frequency values.…”

Section: Numerical Simulation Of the Vibratory Eigen-modes For The Samentioning

confidence: 99%

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Dynamic and Seismic Behaviour of Stone Masonry Arch Bridges in Greece Utilising in-Situ Measurements and Numerical Predictions

Manos¹,

Simos²,

Lambri-Gaitana³

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Stone masonry arch bridges used to be a very important part of the transportation system of the numerous communities living at the mountainous regions of Greece. The wide spread use of car transport after the mid-twentieth century dictated the construction of modern reinforced concrete bridges as part of a new road network. However, a new interest was generated in these structures that have the status of cultural heritage in need of preservation. The present study presents a series of in-situ measurements conducted at selected old stone masonry bridges, using up-to-date system identification techniques, in an effort to identify their dynamic characteristics in terms of eigen-frequencies, eigen-modes and damping properties. All these information is part of a data base that can be used in the future as a reference for identifying noticeable changes in these dynamic characteristics as part of a structural health monitoring effort for these bridges. Moreover, this information provides a basis for building realistic numerical simulations towards studying the structural behaviour of such stone masonry bridges and assessing their expected structural behaviour in extreme future seismic events. Selected in-situ measurements are presented together with their use in building numerical models of various levels of complexity. These numerical models are finally utilized in assessing the expected performance of specific case studies of stone masonry bridge structures in Greece towards meeting the demands of extreme events that include design earthquake loads. The described system identification technique can also be linked to specific actions, such as earthquake activity, and thus serve as warning for specific maintenance countermeasures. 282 COMPDYN 2019 7 th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering M. Papadrakakis, M. Fragiadakis (eds.

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Investigating Stone Masonry Arch Bridges in Greece Employing In-situ Measurements and Numerical Predictions

Manos

Simos

Psyrras

2021

Lecture Notes in Civil Engineering

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The present study presents a series of in-situ measurements conducted at selected old stone masonry bridges, using up-to-date system identification techniques, in an effort to identify their dynamic characteristics in terms of eigenfrequencies, eigen-modes and damping properties. All these information is part of a data base that can be used in the future as a reference for identifying noticeable changes in these dynamic characteristics as part of a structural health monitoring effort for these bridges. Moreover, this information provides a basis for build-ing realistic numerical simulations towards studying the structural behaviour of such stone masonry bridges and assessing their expected structural behaviour in extreme future seismic events. Selected in-situ measurements are presented together with their use in building numerical models of various levels of complexity. These numerical models are finally utilized in assessing the expected performance of specific case studies of stone masonry bridge structures in Greecetowards meeting the demands of extreme events that include design earth-quake loads. The described system identification technique can also be linked to specific actions, such as earthquake activity, and thus serve as warning for specific maintenance counter-measure.

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Near- and far-field earthquake damage study of the Konitsa stone arch bridge

Cited by 28 publications

References 18 publications

Evaluation of the Performance of Unreinforced Stone Masonry Greek “Basilica” Churches When Subjected to Seismic Forces and Foundation Settlement

Evaluation of the Performance of Unreinforced Stone Masonry Greek “Basilica” Churches When Subjected to Seismic Forces and Foundation Settlement

Dynamic and Seismic Behaviour of Stone Masonry Arch Bridges in Greece Utilising in-Situ Measurements and Numerical Predictions

Investigating Stone Masonry Arch Bridges in Greece Employing In-situ Measurements and Numerical Predictions

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