Investigation into brittle failure of some starter bars
conference paper
This paper reports on an investigation into the cause and consequences of an observed brittle behaviour of some starter bars on a construction site in the Netherlands. A few bars suddenly failed when they were bent in order to align them. For the investigation firstly a batch of starter bars that possibly exhibited the same brittle behaviour was traced using a bending test. Both a parameter related to the applied manufacturing process and the nitrogen content of the starter bars, were used to distinguish between probable brittle and ductile starter bars. The fatigue behaviour of the brittle starter bars as well as the ductility of the connection in which these starter bars were used, were investigated experimentally. The fatigue life appeared to be reduced and brittle failures were also observed in the connection where the starter bars are loaded in tension. It could be demonstrated that the structure in which these starter bars were used, still satisfies the requirements. Since the observed brittle behaviour can not be detected by the tests according to the current Dutch Approval Guideline, it is recommended to add an additional bending test, which might be defined using the results of this investigation.
TNO Identifier
330416
ISBN
3-89821-208-4
Publisher
ibidem-Verlag, 2002
Source title
Befestigungstechnik. Bewehrungstechnik und .... Festschrift zu Ehren von Prof. Dr.-Ing. Rolf Eligehausen anlässlich seines 60. Geburtstages. Aktuelle Beiträge aus Forschung und Praxis / W. Fuchs, H.-W. Reinhard (Hrsg.)
Place of publication
Stuttgart
Pages
271-280
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