Chapter 4 - L-type hybrid precast frames with mechanical joints using laminated metal plates

Abstract

The hybrid mechanical joint with the metal plates for the irregular shaped columns is presented to replace the conventional grouted sleeve connections. The contribution of each structural element to the flexural capacity of the proposed joint and the load path during the application of the loads at each structural element of the mechanical joint was explored. Test specimens were eligible to meet design requirements, indicating that a mechanical joint with and without interior bolts can replace the conventional steel-concrete composite precast columns at moment demand. The use of the interior bolts increases the stiffness of the mechanical joint, activating high tensile strains of rebar and steel sections attached to the plates. The rapid and effortless erection of a full-scale irregular L-shaped precast frame assembled using the bolted metal plates was demonstrated with the reduced construction time.