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Title: Cyclic Behavior of Reinforced Concrete Flexural Members Using High-Strength Flexural Reinforcement

Author(s): Min-Yuan Cheng and Marnie B. Giduquio

Publication: Structural Journal

Volume: 111

Issue: 4

Appears on pages(s): 893-902

Keywords: cyclic behavior; deformation capacity; flexural members

DOI: 10.14359/51686632

Date: 7/1/2014

Abstract:
The cyclic behavior of reinforced concrete flexural members using high-strength flexural reinforcement was evaluated in this research. A total of three specimens were tested. Specimen SP1 is reinforced with conventional Grade 60 flexural steel, while Specimens SP2 and SP3 are reinforced with SD685 and A1035 high-strength flexural steel, respectively. Both high-strength steels have specified yield strength of 100 ksi (690 MPa) but feature different stressstrain characteristics. Test results showed that the plastic hinge lengths of test specimens are not highly sensitive to the steel ultimate- to-yield strength ratio; flexural steel without a distinct yield plateau limits the energy dissipation ability but enhances the postyield stiffness of the specimen; and steel rupture strain under cyclic loading reversals and crack distribution are believed to have more influence on member deformation capacity.