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

@article{Lima:2016:10.12989/eas.2017.12.1.119,
author = {Lima, C and Martinelli, E and Macorini, L and Izzuddin, B},
doi = {10.12989/eas.2017.12.1.119},
journal = {Earthquakes and Structures},
title = {Modelling beam-to-column joints in seismic analysis of RC frames},
url = {http://dx.doi.org/10.12989/eas.2017.12.1.119},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Several theoretical and analytical formulations for the prediction of shear strength in reinforced concrete (RC) beam-to-column joints have been recently developed. Some of these predictive models are included in the most recent  seismic  codes  and  currently  used  in  practical  design.On  the  other  hand,  the  influence  of  the  stiffness  and strength degradations in RC joints on the seismic performance of RC framed buildings has been only marginally studied, and it is generally neglected in practice-oriented seismic analysis. To investigate such influence, this paper proposes  a  numerical  description  for  representing  the  cyclic  response  of  RC  exterior  joints.  This  is  then  used  in nonlinear numerical simulations of RC frames subjected to earthquake loading. According to the proposed strategy,RC  joints  are  modelled  using  nonlinear  rotational  spring  elements  with  strength  and  stiffness  degradations  and limited ductility under cyclic loading. The proposed joint model has been firstly calibrated against the results from experimental tests on 12 RC exterior joints. Subsequently, nonlinear static and dynamic analyses have been carried out on two-, three-and four-storey RC frames, which represent realistic existing structures designed according to old standards.  The  numerical  results  confirm  that  the  global  seismic  response  of  the  analysed  RC  frames  is  strongly affected by the hysteretic damage in the beam-to-column joints, which determines the failure mode of the frames. This  highlights  that  neglecting  the  effects  of  joints  damage  may  potentially  lead  to  non-conservative  seismic assessment of existing RC framed structures.
AU  - Lima,C
AU  - Martinelli,E
AU  - Macorini,L
AU  - Izzuddin,B
DO  - 10.12989/eas.2017.12.1.119
PY  - 2016///
SN  - 2092-7614
TI  - Modelling beam-to-column joints in seismic analysis of RC frames
T2  - Earthquakes and Structures
UR  - http://dx.doi.org/10.12989/eas.2017.12.1.119
ER  -
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