1 Student, 2 Technician, 4Professor and Head,
1,2,4 Civil Engineering Dept., The University of Calgary, Calgary, Alberta, Canada
3 Assistant Professor, Structural Engineering Dept., Ain Shams University, Cairo, Egypt
ABSTRACT
A 3 metre high diaphragm wall has been constructed and post-tensioned with four Carbon Fibre Reinforced Plastic (CFRP) prestressing strands and a new anchorage system. Losses of the prestressing forces in these tendons have been monitored. On a theoretical basis, cooling the wall as in a Canadian winter will cause a reduction in prestress force, as opposed to steel tendons, which increase their force with decreasing wall temperature. This has been verified by experiment. The wall was also tested in flexure to cracking. The flexural strength and deformation have been compared to those predicted by analysis.
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