Inelastic Cyclic Behavior of Dowel Bars

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Title: Inelastic Cyclic Behavior of Dowel Bars

Author(s): Parviz Soroushian, Kienuwa Obaseki, Mohamad Imad Baiyasi, Basheer El-Sweidan, and Ki-Bong Choi

Publication: Structural Journal

Volume: 85

Issue: 1

Appears on pages(s): 23-29

Keywords: beams (supports); columns (supports); connections; cracking (fracturing); cyclic loads; dowels; earthquake-resistant structures; hysteresis; models; reinforced concrete; tests; Structural Research

Date: 1/1/1988

Abstract:
Paper summarizes the results of an experimental study on cyclic dowel action of beam longitudinal bars at beam-column interfaces in reinforced concrete frames. The crack patterns and dowel load-deflection diagrams are presented for these specimens with different sizes of dowel bars. Test results indicate that the stiffness and energy dissipation capacity of dowel bars deteriorate severely with repetition of inelastic load cycles. Degradation of strength was, however, observed to be negligible, especially in larger dowel bars. It was also observed that the interface crack grows progressively under inelastic load cycles. An empirical hysteretic model for dowel bars was also derived from the limited test data produced in this study.