Tests on composite beams using new connections by adherence

Abstract

Cast-in-place concrete is often the cheapest solution in the context of conventional construction. However, prefabrication presents advantages in terms of execution time, quality of the structural elements and cost. The association of precast concrete elements and steel sections in a composite element can thus result in a high-quality structure that is executed with greater speed and economical in both financial and material resources. Currently, steel to concrete composite connections are not completely adapted to prefabricated slabs and the use of connections by adhesion, interlocking and friction seem quite promising. To improve knowledge in this field, this paper presents the development of full–scale flexural tests of composite beams using new interfaces for these connections, and the results of these are interpreted and discussed. For comparison purposes, two beams with cast-in-place slabs were tested. Satisfactory behaviour in terms of strength was observed in both cases investigated (cast-in-place and precast slab), justifying further studies on the subject.