Imperial College London
Alternate

ProfessorLorenzoMacorini

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Structural Engineering
 
 
 
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Contact

 

+44 (0)20 7594 6078l.macorini

 
 
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Assistant

 

Ms Ruth Bello +44 (0)20 7594 6040

 
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Location

 

325Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Panto:2021,
author = {Panto, B and Chisari, C and Macorini, L and Izzuddin, B},
pages = {1724--1735},
publisher = {International Centre for NumericalMethods in Engineering (CIMNE)},
title = {A macroscale modelling approach for nonlinear analysis of masonry arch bridges},
url = {http://hdl.handle.net/10044/1/91781},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - Masonry  arches  represent  the  most  important  structural  components  of  masonry  arch   bridges.   Their   response is strongly   affected   by   material   nonlinearity   which   is   associated  with   the   masonry   texture.   For   this   reason,   the   use   of   mesoscale   models,   where   units   and   mortar   joints   are   individually   represented,   enables   accurate   response   predictions   under  different  loading  conditions.  However,  these  detailed  models  can  be  very  computationally demanding and unsuitable for practical assessments of large structures. In  this  regard,  the  use  of   macro-models,   based   on   simplified   homogenised   continuum  representations  for  masonry,  can  be  preferable  as  it  leads  to a  drastic  reduction  of  the  computational  burden.  On  the  other  hand,  the  latter  modelling  approach  requires  accurate  calibration  of  the  model  parameters  to  correctly  allow  for  masonry  bond.  In  the  present  paper, a simplified   macro-modelling  strategy,  particularly  suitable  for  nonlinear  analysis  of  multi-ring  brick-masonry  arches,  is  proposed  and  validated.  A  numerical  calibration  procedure,  based  on  genetic  algorithms,  is  used  to  evaluate  the  macro-model  parameters  from  the  results  of  meso-scale  “virtual”  tests. The proposed macroscale description and the calibration procedure are applied to simulate the nonlinear  behaviour  up  to  collapse  of  two multi-ring   arches   previously   tested   in   laboratory  and   then   to   predict   the   response   of  masonry  arches  interacting  with  backfill  material.  The numerical results confirm the ability of  the  proposed  modelling  strategy  for  masonry  arches  to  predict   the   actual   nonlinear  response  and  complex  failure  mechanisms,  also  induced  by  ring separation, with a reduced computational cost compared to detailed mesoscale models.
AU  - Panto,B
AU  - Chisari,C
AU  - Macorini,L
AU  - Izzuddin,B
EP  - 1735
PB  - International Centre for NumericalMethods in Engineering (CIMNE)
PY  - 2021///
SP  - 1724
TI  - A macroscale modelling approach for nonlinear analysis of masonry arch bridges
UR  - http://hdl.handle.net/10044/1/91781
ER  -
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