Precast Beam-Column Connection Subjected to Cyclic and Dynamic Loadings

摘要

This paper addresses the mechanical behaviour of beam-column connections in precast concrete structures designed for use in constructions that demand rigid connections. In the proposed connection, steel-fibre reinforced concrete (SFRC), splice bars and shear keys were used to develop a connection that is resistant to positive and negative moments. The mechanical behaviour of the proposed connection was evaluated using dynamic and reversal cyclic tests under two models: a monolithic model and a model composed of precast concrete elements connected using 1% SFRC and splice bari to establish the continuity of the reinforcements. The results of cyclic tests showed that this precast beam-column connection exhibits semi-rigid behaviour and high strength (88% of the strength provided by the monolithic model). The results from dynamic tests showed that the uncracked connection had an average damping ratio of similar to 1.0%, decreasing to similar to 0.7% after cracking.