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SUMMARY:Computational modelling of reinforced concrete members with peridy
 namics. - Mark Hobbs\, PhD Candidate\, CUED
DTSTART:20190301T150000Z
DTEND:20190301T160000Z
UID:TALK120751@talks.cam.ac.uk
CONTACT:Karen Mitchell
DESCRIPTION:There is a pressing need to address the overdesign of reinforc
 ed concrete structures. The utilisation of structural concrete members is 
 often very low and structural material wastage in the order of 50% is comm
 on. Using fabric formwork\, it is possible to design and build optimised n
 on-prismatic concrete members that use up to 40% less concrete than prisma
 tic members of equivalent strength. Ensuring the safety and reliability of
  highly efficient structural members requires accurate analysis methods. \
 nPredicting the shear behaviour of reinforced concrete members is notoriou
 sly difficult and codified design methods are generally based on empirical
  formulas derived from the testing of prismatic beams. Non-prismatic membe
 rs fall outside of conventional design codes and current methods for deter
 mining their structural response and ultimate limit state behaviour are in
 adequate. Robust and accurate numerical models are needed for predicting t
 he behaviour of optimised reinforced concrete structural members.\nThis wo
 rk utilises the peridynamic theory of solid mechanics to develop numerical
  models for the analysis of three-dimensional reinforced concrete members.
  The peridynamic theory does not include spatial derivatives and remains v
 alid across discontinuities\, allowing for the natural inclusion of fractu
 re behaviour. The presented work examines the suitability of numerical mod
 els based on the peridynamic theory for simulating the complex ultimate li
 mit state behaviour of reinforced concrete\, when little or no a priori kn
 owledge is available on possible fracture behaviour. \nThe developed numer
 ical model is applied to the simulation of reinforced concrete members fai
 ling in flexure and shear. It is demonstrated that the numerical model can
  capture the failure mode and load capacity of reinforced concrete members
  and the observed fracture behaviour is generally in agreement with experi
 mental results. Using only a simple linear damage model it is possible to 
 simulate different types of shear failure in reinforced members.  \n
LOCATION:Cambridge University Engineering Department\, LR11
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