ENERGY DISSIPATION MODELS IN HYBRID JOINTS OF POST TENSIONED CONCRETE FRAME STRUCTURES

Abstract

The use of pre-molded reinforced concrete structures has recently increased because the simplicity of its assembly reduce of construction times, however, the use of the technique located in seismic regions have shown partial and total collapse as demonstrated in the earthquake Northridge, 1994. After that event, the Precast Seismic Structural System technology was consolidated in the specialty. The technique consists of hybrid connection between the beam and columns of pre-molded structures that allows to dissipate energy through a rigid rotation of the node without damage to the structural elements of the frame. The paper shows a theoretical study of the responses of traditional frame of reinforced concrete and pre-cast frame of post-tensioned concrete with hybrid joints. Different non-linear models are used to evaluate the response where use date of experimental tests carried out by other authors. The responses an educational building designed with a structure of traditional reinforced concrete and the same building but with pre-molded frame of post-tensioned concrete with hybrid joints are also studied. The results show that the hybrid joint has energy dissipation capacity and turns it a suitable technique for a ductile behavior of the structure.