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.
To 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