مطالعه تجربی روی پرتو های تقویت شده سنگ

The proposed article is dedicated to the study of an innovative system of reinforced stone beam in which the reinforcement is not used as a simple tie that overtakes the structure thrust but rather works with the stone together to build a system that resists vertical forces by bending. The study consists in an experimental program carried out on three beams made of dimension stones tested under four points bending. The beams are subjected to a small number of loading–unloading cycles to evidence hysteresis effects. Typical load–displacement curves are produced from data recorded by load cells, extensometers and strain gages measuring characteristic displacements, crack opening and strain in the reinforcement. Then a simple analytical model based on existing models for reinforced concrete is used to interpret the experimental results and by reverse analysis to identify some characteristics of the beams. Finally a short conclusion closes the paper on the potential of these structures for modern architecture and gives some perspectives of further investigations.