Performance assessment of overlay strengthened masonry under cyclic loading using the diagonal tensile test

Abstract

Masonry elements with structural purposes can be found not only in historical heritage constructions, but also in residential buildings constructed during the last decades. With the aim of making these structures less vulnerable to seismic events, several strengthening techniques have been developed. One technique, recently considered of great potential, is based on the application of mortar and a FRP mesh embedded in that layer. The simple procedure of application and the use of relatively affordable materials seem to lead to economically competitive retrofitting solutions with great performance. In this paper the in-plane monotonic and cyclic characterization by means of diagonal tensile test of a high ductility strengthening system is presented. The discussion of results is mostly focussed on the analysis of the vulnerabilities of the masonry strengthening system, particularly regarding the behaviour of the interface between the overlay and the retrofitted substrate.