Bond Analysis between Fiber Reinforced Polymeric Composites and Clay Masonry Blocks
Tomme: LIX (LXIII) Fascicle: 2 | 2013
Pages: 35-44
Abstract text:
Masonry structures have been used ever since the dawn of construction, and nowadays, due to structural inadequacies, material degradation caused by aging, and alterations carried out during use over the years, elements often need strengthening to re-establish or improve their performance. All designers seek efficient solutions; requirements which fiber reinforced composite strengthening systems can be designed to meet. In this frame, fibre reinforced polymeric composites (FRP), used as external reinforcement bonded to the masonry substrate, can be a competitive strengthening solution if they comply with the cultural value of the building. One of the most important aspects when strengthening masonry elements using FRP materials is the bond between the composite reinforcement and the substrate, which influences in a great extent the performance of the strengthened member. Actually, a premature and brittle failure at the interface, called delamination, can occur compromising the overall structural response. In the literature, many research projects that study the bond between FRP sheets and concrete were developed, while in case of masonry substrates there are many fewer experimental results available. This paper presents the results of an experimental analysis on bond behaviour between FRP sheets (of different types and dimensions) and masonry substrate, using shear test setup. The obtained results are presented and discussed.
Key Words:
bond; FRP; masonry; delamination; strengthening.
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