Fatigue Failure Criterion for Deformed Bars Subjected to Large Deformation Reversals

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Title: Fatigue Failure Criterion for Deformed Bars Subjected to Large Deformation Reversals

Author(s): T. Higai, H. Nakamura, and S. Saito

Publication: Special Publication

Volume: 237

Issue:

Appears on pages(s): 37-54

Keywords: buckling; deformed bars; failure criteria; low-cycle fatigue; plastic strain

Date: 8/1/2006

Abstract:
After the Hanshin-Awaji earthquake, the volume of lateral reinforcement used in reinforced concrete structures in Japan was increased to improve seismic performance. Although a large volume of closely spaced lateral reinforcement will be effective in preventing elastic buckling of the longitudinal reinforcement, it will not prevent plastic buckling. Under severe earthquake loading, longitudinal reinforcement will be subjected to large reversed-cyclic deformation demands into the plastic regime in tension and the buckling regime in compression. The authors presented the results of low cycle fatigue testing of deformed bars and examination of failure criteria for these bars.