Behavior of HPFRC Connections for Precast Concrete Frames Under Reversed Cyclic Loading Rosa M. Vasconez, Ph.D. Associate Professor University of Los Andes Merida, Venezuela Antoine E. Naaman, Ph.D. Professor Department of Civi l and Environmental Engineering Un iversity of Michigan Ann Arbor, Michigan James K. Wight, Ph.D., P.E . 58 Professor Department of Civil and Environmental Engineering University of Michigan Ann Arbor, Michigan Describes the development of a high energy absorbing joint for precast/prestressed concrete structures in seismic zones. The joint acts as an energy dissipating connector between the beam and column elements. The material of the joint is a high performance fiber reinforced cement composite (HPFRC) matrix. Thirteen joint/ connect ion specimens were tested with the objectives of devising a reinforcement scheme for locating beam plastic hinges inside HPFRC cast- in-pla ce con nections, investigating the effect of different design parameters on the stability of the hysteretic response of the connections, and determining the reduction of transverse reinforcement in the connection by using steel fibers in the connection matrix. The performance of the connection was evaluated in terms of the failure mode, connection strength, displacement and rotation ductilities, connection flexural and shear deformations, energy dissipation, and loss of stiffness due to cycl ic loading. P recast and precast, prestressed concrete structures have been shown to be safe, durable, reliable, and cost-effective structural systems. However, their full implementation in seismic regions in the United States has been limited. One of the main reasons for this situation is the lack of development of seismic resistant beam-to- column connections appropriate for these structures.' This investigation focuses on the behavior of cast-in- place (CIP) high performance fiber reinforced cement PCI JOURNAL
Behavior of HPFRC Connections for Precast Concrete Frames Under Reversed Cyclic Loading
Jun 20, 2023
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