Academic Journal
Dynamic numerical modelling of co-seismic landslides using the 3D distinct element method: Insights from the Balta rockslide (Romania)
| العنوان: | Dynamic numerical modelling of co-seismic landslides using the 3D distinct element method: Insights from the Balta rockslide (Romania) |
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| المؤلفون: | Mreyen, Anne-Sophie, Donati, Davide, Elmo, Davide, Donze, Frederic Victor, Havenith, Hans-Balder |
| المصدر: | Engineering Geology, 307, 106774 (2022-09-20) |
| بيانات النشر: | Elsevier B.V., 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Back-analysis, Flysch rockslide, Geomodelling, Internal fracturing, Numerical modelling, Slope reconstruction, 3d distinct element methods, Dynamic numerical modeling, Geomodeling, Romania, Seismic landslides, Vrancea, Geotechnical Engineering and Engineering Geology, Geology, Engineering, computing & technology, Geological, petroleum & mining engineering, Physical, chemical, mathematical & earth Sciences, Earth sciences & physical geography, Ingénierie, informatique & technologie, Géologie, ingénierie du pétrole & des mines, Physique, chimie, mathématiques & sciences de la terre, Sciences de la terre & géographie physique |
| الوصف: | Ancient landslides of unknown origin can be found in large numbers in mountainous regions; some represent valid markers of (pre-)historic natural regimes referring to either long-term evolution or short-term peak events of climatic and seismotectonic nature. An example is represented by the Balta rockslide in the Romanian Carpathian Mountains. Its location in the seismically active Vrancea-Buzau region, as well as its morphological features, deep-seated rupture surface and large debris volume, raise the question of its failure history with regard to a possible co-seismic triggering. A 3D volume based reconstruction of the slope morphology together with field measurements of elasto-plastic in-situ rock properties allow to estimate pre-failure conditions of the slope, with special regards to the geological, i.e. flysch bedrock of poor to fair rock quality, and structural settings, i.e. anti-dip slope bedding crossed by the main joint family. The reconstructed slope behaviour was tested under static and dynamic forces with the 3D distinct element code 3DEC, subsequently used to simulate a failure scenario with a 120 s long real earthquake record that leads to the realistic post-failure morphology of Balta. For the latter, we observe a principally joint-controlled failure combined with internal fracturing of the undamaged rock mass. After 230 s of simulated time, the landslide debris reaches the valley bottom with maximum displacements of 1350 m and is marked by a lateral expansion to a broader extent than the source zone width, as observed in the field. Extension of this work to other pre-historic slope failures in the valleys of Vrancea-Buzau yield valuable new information for future seismic hazard estimations of the region. |
| نوع الوثيقة: | journal article http://purl.org/coar/resource_type/c_6501 article peer reviewed |
| اللغة: | English |
| Relation: | https://api.elsevier.com/content/article/PII:S0013795222002599?httpAccept=text/xml; urn:issn:0013-7952 |
| DOI: | 10.1016/j.enggeo.2022.106774 |
| URL الوصول: | https://orbi.uliege.be/handle/2268/293993 |
| Rights: | open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsorb.293993 |
| قاعدة البيانات: | ORBi |
| DOI: | 10.1016/j.enggeo.2022.106774 |
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