Mechanical behavior of a full-scale RC wall-slab connection reinforced with ftp under cyclic loading

摘要

This paper presents the results of two wall-slab connection tests to study the effect of composite reinforcement materials. The tests are carried out at Scale 1 on X-shaped connections with a wall and a continuous floor on either side of the node. The geometry and steel rebars of the tested specimens are chosen in accordance with European constructive practice [1]. The composite reinforcement is a combination of CFRP, GFRP, and carbon mesh. To study the mechanical behavior of the node, a combination of displacement transducers, load cells, strain gauges, and digital image correlation is used. From analysis of the results, we observe that the composite reinforcement increases the strength of the joint by 80%, and increases ductility by 33%. The reinforcement also changes the failure mode from a bending failure of the wall to a shear failure of the joint. By repositioning the failure zone, composite reinforcement also increases the energy dissipation of the joint by 385%. The proposed reinforcement solution is effective, and can be applied to existing structures that no longer meet seismic safety requirements.