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Numerical study on factors that influence the in-plane drift capacity of unreinforced masonry walls

Dolatshahi, K. M ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1002/eqe.3024
  3. Publisher: John Wiley and Sons Ltd , 2018
  4. Abstract:
  5. Displacement-based assessment procedures require as input reliable estimates of the deformation capacity of all structural elements. For unreinforced masonry (URM) walls, current design codes specify the in-plane deformation capacity as empirical equations of interstory drift. National codes differ with regard to the parameters that are considered in these empirical drift capacity equations, but the inhomogeneity of datasets on URM wall tests renders it difficult to validate the hypotheses with the currently available experimental data. This paper contributes to the future development of such empirical relationships by investigating the sensitivity of the drift capacity to the shear span, the aspect ratio, the axial load ratio, and the size of the wall. For this purpose, finite element models of URM walls are developed in Abaqus/Explicit and validated against a set of experimental results. The results show that the axial load ratio, the shear span, and the wall size are among the factors that influence the drift capacity the most. Empirical equations are mainly derived from test results on small walls, and the numerical results suggest that this can lead to a significant overestimation of the drift capacity for larger walls. Copyright © 2018 John Wiley & Sons, Ltd
  6. Keywords:
  7. Abaqus ; Finite element modeling ; Shear span ; Unreinforced masonry walls ; ABAQUS ; Aspect ratio ; Axial loads ; Boundary conditions ; Masonry construction ; Masonry materials ; Retaining walls ; Shear flow ; Walls (structural partitions) ; Assessment procedure ; Deformation capacity ; Drift capacity ; Empirical relationships ; In-plane deformation ; Size effects ; Un-reinforced masonry walls ; Finite element method ; boundary condition ; Deformation ; Empirical analysis ; Masonry ; Numerical model ; Size effect ; Wall
  8. Source: Earthquake Engineering and Structural Dynamics ; Volume 47, Issue 6 , 2018 , Pages 1440-1459 ; 00988847 (ISSN)
  9. URL: https://onlinelibrary.wiley.com/doi/full/10.1002/eqe.3024