Smart Structures and Systems

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Experimental and numerical studies toward the implementation of shape memory alloy ties in masonry structures

  • Casciati, Sara (ASTRA Department, School of Architecture, University of Catania) ;
  • Hamdaoui, Karim (Department of Structural Mechanics, University of Pavia)
  • Received : 2006.10.04
  • Accepted : 2007.08.08
  • Published : 2008.03.25
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Abstract

The use of pre-tensioned shape memory alloy (SMA) wires to retrofit historic masonry structures is investigated. A small wall, serving as a prototype masonry specimen, is constructed to undergo a series of shaking-table tests. It is first studied in its original state, and its dynamic characteristics (in terms of modal frequencies) are extracted from the recorded signals. The results are then compared with those obtained when an increasing number of couples of pre-stressed SMA wires are introduced in the specimen to link the bricks together. A three-dimensional finite element model of the specimen is developed and calibrated according to the modal parameters identified from each experimental test (with and without SMA wires). The calibration process is conducted by enhancing the masonry mechanical behaviour. The results and the effectiveness of the approach are presented.

Keywords

References

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