Conference
Rock concerts and soccer matches: how extreme could be ground motion generated by jubilant crowds ?
| العنوان: | Rock concerts and soccer matches: how extreme could be ground motion generated by jubilant crowds ? |
|---|---|
| المؤلفون: | Bard, P.-y, Alkhally, Tanios, Wathelet, Marc, Guillier, Bertrand, Cornou, Cécile, Chaljub, Emmanuel |
| المساهمون: | Institut des Sciences de la Terre (ISTerre), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ), الجامعة اللبنانية بيروت = Lebanese University Beirut = Université libanaise Beyrouth (LU / ULB), Francesco Silvestri, Nicola Moraci |
| المصدر: | 7th International Conference on Earthquake Geotechnical Engineering (ICEGE 2019) https://hal.science/hal-02189122 7th International Conference on Earthquake Geotechnical Engineering (ICEGE 2019), Jun 2019, Rome, Italy http://www.7icege.com |
| بيانات النشر: | CCSD CRC Press |
| سنة النشر: | 2019 |
| المجموعة: | Université Savoie Mont Blanc: HAL |
| مصطلحات موضوعية: | anthropic vibrations, non-linear soil behavior, Focusing, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [SPI.GCIV.RISQ]Engineering Sciences [physics]/Civil Engineering/Risques, [SPI.GCIV.DV]Engineering Sciences [physics]/Civil Engineering/Dynamique, vibrations |
| جغرافية الموضوع: | Rome, Italy |
| الوصف: | International audience ; There have been over last decades several examples of large ground vibrations caused by masses of people gathered for special events: a rock concert in Ullevi stadium (Gothenburg, Sweden) in 1985 generated strongly felt tribune vibrations, while there are repeated examples of seismological recordings corresponding to goals in high stake soccer matches (for instance, the famous Barça "remontada" against PSG in 2016-17 Champion's league, and the Mexico victory over Germany during World Cup 2018). Such man-induced vibrations can therefore be a concern for the design of stadium facilities, in order to avoid coincidence between structural frequencies and man-made beating frequencies (generally around 2 Hz). The present work reports a numerical investigation about how extreme could be such vibrations at ground level. We use the discrete wavenumber approach to model the wave field generated by surface sources (corresponding mainly to vertical forces) with an amplitude corresponding to the surface load estimated for jumping crowds (around 3 KPa, Erlingsson and Bodare 1999). We consider a ground layering leading to resonant frequencies close to 2 Hz, and compute the ground motion at various distances (from a few tens of meters to several kilometers). The largest ground motion is found to correspond to the center of sets of sources arranged in circles having a radius of several hundred meters, and a beating frequency tuned to the Airy phase of Rayleigh waves, and an underground structure with significant velocity contrast and low damping. In such cases, as long as the soil behaves linearly, the ground displacement is found to possibly exceed several cm, while the velocity can reach several tens of cm/s at the very center of the circle. The conditions for large vibrations are thus: efficient wave trapping in shallow soil layers (i.e., large velocity contrast), rather low damping, energetic surface waves and specific geometrical configurations (underground structure combined with source geometry). ... |
| نوع الوثيقة: | conference object |
| اللغة: | English |
| الاتاحة: | https://hal.science/hal-02189122 https://hal.science/hal-02189122v1/document https://hal.science/hal-02189122v1/file/Article_Bard-et-al_7ICEGE_v0.pdf |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.86A601DD |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |