Earthquakes and Structures

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Enhanced macro element for nonlinear analysis of masonry infilled RC frame structures

  • Mebarek Khelfi (Department of Civil Engineering, National Earthquake Engineering Research Center) ;
  • Fouad Kehila (Department of Civil Engineering, National Earthquake Engineering Research Center)
  • Received : 2023.04.07
  • Accepted : 2023.08.18
  • Published : 2023.09.25
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Abstract

Reinforced concrete frames with a masonry infill panel is a structural typology frequently used worldwide. In seismic cases, the interaction between the masonry infill and the RC frames constitutes one of the most complex subjects in earthquake engineering. In this work, an enhancement of an existing numerical model is proposed to improve the estimation of lateral strength and stiffness of masonry-infilled frame structures and predict their probable failure modes. The proposed improvement is based on attributing corrective coefficients to the shear strength of each diagonal shear spring of the macro element, which simulates the masonry infill. The improved numerical model is validated by comparing the results with those of the original numerical model and with experimental results available in the literature. The enhanced macro element model can be used as a powerful, accessible tool for assessing the capacity and stiffness of masonry-infilled frame structures and predicting their probable failure modes.

Keywords

Acknowledgement

The National Earthquake Engineering Research Center, CGS, Algeria supported this research.

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