Testing of full-scale masonry wall post-tensioned with unbonded high strength bars

PhD student Reza Hassanli, supervised by Prof. Julie Mills and Dr Mohamed Elgawady, recently conducted an experiment testing a full-scale masonry wall post-tensioned with unbonded high strength bars. Incorporating unboned post-tensioning into masonry walls provides a system with high strength and capacity and unique behaviour. 

Concrete Wall breakingTo the right is an animated GIF of the wall being tested. Please download Post-tensioned Masonry Power Point (19MB) for more information.

 Incorporating unboned post-tensioning into masonry walls provides a system with high strength and capacity and unique behaviour.

The advantages of this system are as follows:

  • The system maintains its integrity even in large displacements
  • The pre-compression works as an active force and prevent or reduce the tension force occurs in the masonry.
  • Self-cantering behaviour (Wall returns back to original alignment after earthquake)
  • Large displacement capacity (withstand large displacement without considerable damage)
  • Localized damage and cost effective (In severe events such as large earthquakes, the damage is limited to a small portion of the toe of the wall, which can be repaired easily and with minimal cost
  • The construction of the wall is easy, cheap and fast


Building the wallA photo of all those involvedGroup shot in front of the wall

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