Enhancing Seismic Performance of Precast Concrete Structures through Novel Beam-to-Column Connections

Marius G.L. Moldovan, Mihai Nedelcu

Abstract

Precast concrete structures, despite their growing popularity and numerous advantages, face challenges related to structural continuity disruption, which significantly impacts seismic design. Existing dowel connections, which should remain elastic during seismic events, often form partial failure mechanisms due to plastic deformations, thereby diminishing the assumed dissipative potential of the structure. Past research has highlighted the inefficiency of the two-dowel connection system in providing sufficient capacity for achieving column failure under cyclic loads, a key dissipative mechanism for inverted pendulum systems. Hence, there is a compelling need to improve the behaviour of beam-to-column connections in seismically active areas. This research proposes a new connection solution that offers substantial capacity improvements over the conventional dowel connection. The capacity of the proposed connection was evaluated against results derived from calibrated finite element models based previous experimental data. Furthermore, the unique configuration of the connection provides possibility for further enhancements, with individual elements adjustable to optimize efficiency. The findings support the potential of the proposed connection as a viable alternative.