Seismic performance of precast concrete beam-column connections with innovative dry mechanical splice

초록

This study presents an innovative mechanical splice system to facilitate dry connections for code-compliant precast concrete beam-column joints. To evaluate its emulative seismic performance, two precast concrete beam-column subassembly specimens were designed and fabricated in accordance with seismic design pro-visions for special and intermediate moment frames. They were tested under cyclic loading, with two con-ventional cast-in-place control specimens. The precast concrete specimens with dry mechanical splices exhib-ited strength, ductility, failure modes, strain responses, energy dissipation, and strength degradation character-istics comparable with those of the control specimens under the test conditions. This demonstrates that the proposed seismic details can achieve emulative seismic performance. Researchers developed a lumped-plastic-hinge analysis model with an explicit joint element to simulate, using nonlinear conditions, the performance of precast concrete moment frame systems with dry connections. The model's analytical hysteretic respons-es agreed with the measured cyclic behavior of the physical specimens, confirming the applicability of the model proposed for precast concrete beam-column connections.

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