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Bulletin of Earthquake Engineering

, Volume 14, Issue 3, pp 769–803 | Cite as

Strength, stiffness and cyclic deformation capacity of RC frames converted into walls by infilling with RC

  • Dionysis Biskinis
  • Michael N. FardisEmail author
  • Apostolos Psaros-Andriopoulos
Original Research Paper
  • 386 Downloads

Abstract

In seismic retrofitting of concrete buildings, frame bays are converted into reinforced concrete (RC) walls by infilling the space between the frame members with RC of a thickness of not more than their width. The cyclic behavior of the resulting wall depends on the connection between the RC infill and the surrounding RC members. The paper uses the results from 56 cyclic tests on such composite walls to express their properties in terms of the geometry, the reinforcement and the connection. Properties addressed are: (a) the yield moment at the story base; (b) the secant-to-yield-point stiffness over the shear span of the wall in a story; (c) the deflection at flexural failure in cyclic loading; (d) the cyclic shear resistance, including a sliding shear failure mode. Separate models are given for squat walls failing in shear and for those where the top of the column shears-off. The proposals are modifications of models developed in the past for monolithic RC walls from several hundred cyclic tests; blind application of these latter models as though the walls were monolithic gives, in general, unsafe predictions. By contrast, the diagonal compression strut approach in ASCE41-06 is safe-sided, but gives unacceptably large prediction scatter.

Keywords

Concrete walls Deformation capacity RC infills RC walls Seismic rehabilitation Seismic retrofitting Shear resistance Shear sliding Stiffness Ultimate deformation 

Notes

Acknowledgments

The research leading to these results receives funding from the General Secretariat for Research and Technology under Grant ERC-12 of the Operational Program “Education and lifelong learning”, co-funded by the European Union (European Social Fund) and national resources.

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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Dionysis Biskinis
    • 1
  • Michael N. Fardis
    • 1
    Email author
  • Apostolos Psaros-Andriopoulos
    • 1
  1. 1.University of PatrasPatrasGreece

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