The behaviour of prestressed masonry elements under flexural loading

Abstract

The aim of this research effort is to investigate the principle of transfer of the tension in the steel post-tensioning cables into compression in the masonry elements of a post-tensioned masonry beam, and to determine whether it may be employed as an effective and valid alternative solution in modern day construction, or as an intervention in old/historic buildings. The experimental programme involved two beams with different span-to-depth ratios which were tested using the same method and principle, attempting to render the whole section of the beam in compression by the insertion of prestressed steel cables. The test results monitored are deflections and strains in the masonry both in the elastic and post-elastic stages up to failure load. The scope of this dissertation is to develop further the notion that through the application of recent prestressing systems, globigerina limestone can be utilized as a modern structural engineering material, whilst retaining its traditional architectural, physical and structural properties.