BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Virtual MEchanics GAthering -MEGA- Seminar: What makes dams move: 
 mechanics of alkali-silica reaction through modelling
DTSTART:20210304T161500
DTEND:20210304T173000
DTSTAMP:20260414T132348Z
UID:753728ada1a79c7a740ca732bb3f71f1718c32eceb2d563067aecf1e
CATEGORIES:Conferences - Seminars
DESCRIPTION:Emil Gallyamov (LSMS\, EPFL)\nAbstract Alkali-silica reaction
  (ASR) in concrete occurs between alkalis of mortar and silica contained i
 n aggregates. It results in growth of either amorphous or crystalline prod
 uct that imposes internal pressure upon concrete. This leads to expansion 
 and cracks development. High water saturation and elevated temperatures tr
 igger ASR and accelerate material deterioration.\n\nASR activated massive 
 concrete structures\, such as hydraulic dams\, bridge piers and sea walls\
 , deserve special attention due to their elevated safety requirements. To 
 predict their behaviour\, numerical modelling is widely used. However\, th
 e scale of the driving process (ASR) is separated from the scale of intere
 st (macroscopic displacements and stresses) by few orders of magnitude.\n\
 nWe have proposed a multi-scale approach that models ASR evolution at the 
 concrete meso-scale and updates deformations and expansion at the macro-sc
 ale. A distinguishing feature of this multi-scale model is the combination
  of macro-scale loads (water pressure\, self-weight\, etc.) and the intern
 al meso-scale loading (ASR product pressure). In response to both types of
  load\, meso-scopic representative volume element (RVE) can develop cracks
  that are modelled by orthotropic continuum damage with stiffness recovery
  upon closure.\n\nThe proposed model is applied to a cross-section of a mi
 ddle-sized ASR-affected concrete gravity dam in Alps region of Switzerland
 . Simulation results are compared with the field measurements and observat
 ions.\n\nBio Emil Gallyamov is a PhD student in the Computational Solid M
 echanics Laboratory\, under the scientific supervision of Prof. J.-F. Moli
 nari. He first graduated as a civil engineer in the Ufa State Petroleum Te
 chnological University (Russia) in 2010. Five following years he had spent
  working in the upstream oil & gas industry around the globe. Before comin
 g to Lausanne\, he obtained his M.Sc. in Geotechnics in the Technical Univ
 ersity of Delft (Netherlands) in 2017. During his studies\, he got interes
 ted in numerical methods in mechanics\, which brought him to his PhD devot
 ed to numerical modelling of concrete.\n 
LOCATION:https://epfl.zoom.us/s/84678428267 Passcode: 174387 https://epfl.
 zoom.us/s/84678428267
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR