Bond of Ribbed Bars Under High Cycle Repeated Loads


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Title: Bond of Ribbed Bars Under High Cycle Repeated Loads

Author(s): G. Rehm and R. Eligehausen

Publication: Journal Proceedings

Volume: 76

Issue: 2

Appears on pages(s): 297-310

Keywords: bond (concrete to reinforcement); cyclic loads; deformed reinforcement; fatigue (materials); pullout tests; reinforced concrete; stresses.

Date: 2/1/1979

To determine the bond behavior of ribbed bars under repeated loads, 308 pullout specimens were tested. The specimens failed by pulling out of the bars. In the tests the following parameters were varied: maximum load and load amplitude, bar diameter, concrete quality, and bond length. Furthermore, as a comparison, tests under sustained load were carried out. A repeated load has a similar influence on the bond as on the deformation and failure behavior of unreinforced concrete, and it accelerates, in comparison with a sustained load, the nonelastic deformation (slip).