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Stress concentration and fatigue of profiled reinforcing steels

Zheng, H. / Abel, A.

Stress concentrations arise from profiles of ribbed reinforcing steel bars and in this study the results of calculated stress concentration factors (SCF), by using finite element method, are related to the fatigue test results. It is apparent that the degree of confinement of a ribbed bar embedded in concrete not only affects the magnitude of the ultimate bond stress but also the bond stress-slip relation. Thus the rib geometry or profile pattern is designed for optimum bond characteristics and not for fatigue considerations. However the rib geometry influences the fatigue performance through the SCFs arising from the root radius, width and flank angles of the profiles. It is shown that these latter factors have a significant influence on the fatigue behaviour of reinforcing steel bars.

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Stress concentration and fatigue of profiled reinforcing steels

Zheng, H. / Abel, A.

Stress concentrations arise from profiles of ribbed reinforcing steel bars and in this study the results of calculated stress concentration factors (SCF), by using finite element method, are related to the fatigue test results. It is apparent that the degree of confinement of a ribbed bar embedded in concrete not only affects the magnitude of the ultimate bond stress but also the bond stress-slip relation. Thus the rib geometry or profile pattern is designed for optimum bond characteristics and not for fatigue considerations. However the rib geometry influences the fatigue performance through the SCFs arising from the root radius, width and flank angles of the profiles. It is shown that these latter factors have a significant influence on the fatigue behaviour of reinforcing steel bars.

Stress concentration and fatigue of profiled reinforcing steels

Zheng, H. / Abel, A.

Stress concentrations arise from profiles of ribbed reinforcing steel bars and in this study the results of calculated stress concentration factors (SCF), by using finite element method, are related to the fatigue test results. It is apparent that the degree of confinement of a ribbed bar embedded in concrete not only affects the magnitude of the ultimate bond stress but also the bond stress-slip relation. Thus the rib geometry or profile pattern is designed for optimum bond characteristics and not for fatigue considerations. However the rib geometry influences the fatigue performance through the SCFs arising from the root radius, width and flank angles of the profiles. It is shown that these latter factors have a significant influence on the fatigue behaviour of reinforcing steel bars.

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Title:

Stress concentration and fatigue of profiled reinforcing steels

Contributors:

Zheng, H. (author) / Abel, A. (author)

Published in:

International Journal of Fatigue ; 20 ; 767-773

Publication date:

1998

Size:

7 Seiten, 7 Quellen

ISSN:

DOI:

https://doi.org/10.1016/S0142-1123(98)00051-6

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Dauerschwingprüfung , mechanische Spannungsverteilung , Spannungsintensitätsfaktor , Spannungsanalyse , Finite-Elemente-Methode , Beton , mathematisches Modell , Baustahl

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