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SUMMARY:Crack-based assessment and retrofit of concrete members - Boyan Mi
 haylov\, University of Liege
DTSTART:20220527T140000Z
DTEND:20220527T150000Z
UID:TALK174971@talks.cam.ac.uk
CONTACT:Mishael Nuh
DESCRIPTION:The main indicator of damage in concrete structures are existi
 ng cracks. In this regard\, modern wireless sensing networks can be used t
 o provide continuous measurements of crack displacements\, strains\, corro
 sion indicators\, temperature and other quantities. In addition\, drones e
 quipped with high-resolution cameras and coupled with artificial intellige
 nce (AI) algorithms can provide accurate maps of the cracks and damage in 
 the structure. However\, despite the advances in modern technology\, a key
  question remains: how to transform the monitoring data from existing crac
 ks into useful knowledge about the safety of the structure?\n\nTo address 
 this question\, a kinematic modelling approach has been developed at the U
 niversity of Liege for various concrete members and regions. This approach
  is based on an explicit kinematic modelling of the critical cracks (crack
  widths and slip)\, and also includes equilibrium conditions and constitut
 ive relationships for the load-bearing mechanisms in the member. The semin
 ar will discuss how this approach can use crack data as an input to predic
 t the complete behaviour and residual load-bearing capacity of cracked mem
 bers. Furthermore\, for members with inadequate residual capacity\, a retr
 ofit solution using ultra-high performance fiber reinforced concretes (UHP
 FRC) will be discussed. It will be shown that the crack-based modelling ap
 proach is also well suited for evaluation of the effect of UHPFRC strength
 ening.
LOCATION:CivEng Seminar Room (1-33) (Civil Engineering Building)
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