Earthquakes and Structures

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Lateral loading test for partially confined and unconfined masonry panels

  • Tu, Yi-Hsuan (Department of Architecture, National Cheng Kung University) ;
  • Lo, Ting-Yi (Department of Architecture, National Cheng Kung University) ;
  • Chuang, Tsung-Hua (TOP Associates, Architects, Planners & Engineers)
  • Received : 2019.03.04
  • Accepted : 2020.02.04
  • Published : 2020.03.25
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Abstract

Four full-scaled partially confined and unconfined masonry panels were tested with monotonic lateral loads. To study the effects of vertical force and boundary columns, two specimens with no boundary columns were subjected to different vertical forces, while two wing-wall specimens had the column placed eccentrically and in the middle, respectively. The specimens with no boundary columns exhibited ductile rocking behavior, where the lateral strength increased with increasing vertical compression. The wing-wall specimens with columns behaved as strut-and-tie systems. The column-panel interaction resulted in greater strength, lower deformation capacity and differences in failure modes. A comparison with analytical models showed that rocking strength can be accurately estimated using vertical force and the panel aspect ratio for panels with no boundary columns. The estimation for lateral strength on the basis of a panel section area indicated scattered error for wing-wall specimens.

Keywords

Acknowledgement

Supported by : National Science Council

The research is funded by the National Science Council, Taiwan, through grant NSC 96-2923-E-492-002-MY3. The authors gratefully acknowledge the staff of the National Center for Research on Earthquake Engineering for supporting the experiment.

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