Abstract
This paper focuses on a novel strengthening method for stone beams. An experimental study on the flexural behavior of six full scale stone beams, including three beams unstrengthened and three beams strengthened with a combination of angle steels and PET (polyethylene terephthalate plastic) belts, was performed. The failure modes, flexural capacity, deformability, and influence of different types and dimensions of stones, along with the different specifications of angle steels on the flexural behavior, were analyzed. The experimental results indicated that: unstrengthened greenish white marble beams exhibited a typical brittle failure mode, and unstrengthened white marble beams with better deformation properties exhibited a non-fully brittle failure mode; each of the strengthened stone beams exhibited a non-fully brittle failure mode. Furthermore, the flexural capacity and deformation capacity of the strengthened stone beams were improved to some extent. After the ultimate load, strengthened stone beams still had a certain flexural capacity, namely the flexural capacity margin, because of the action of angle steels. A theoretical analysis of the flexural capacity of stone beams was conducted, and a simplified calculation formula of the ultimate flexural capacity and flexural capacity margin was proposed.
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