Rolf Eligehausen
Northwestern University
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Featured researches published by Rolf Eligehausen.
Archive | 1992
Josko Ozbolt; Rolf Eligehausen
In the present paper the pull-out of deformed steel bar embedded in a concrete cylinder and pulled out by monotonic and cyclic loading is analyzed and discussed. The analysis is carried out by the use of axisymmetric finite elements and general microplane model for concrete. Current version of the model was not able to predict damage in shear due to cycling loading correctly. Therefore, the model is further improved and extended in a more general form. In the present numerical case study, instead of the classical interface element approach, a more general approach is used in which the geometry of the ribs of the deformed steel bar are exactly modeled. In the present numerical case study, the pull-out failure mechanism is analyzed and compared with experimental observations. The comparison indicate qualitatively good agreement. Predicted failure load is in good agreement with experimental results, however, calculated displacement are much smaller than measured in tests . The present approach is able to correctly predict the monotonic as well as cyclic behavior including friction and degradation of pull-out resistance caused by previous damage.
Archive | 1991
Rolf Eligehausen; Josko Ozbolt
Anchoring elements, such as headed studs, are used to transfer concentrated loads into reinforced concrete members. From expenmental evidence it is known that, provided the steel strength of the stud is high enough, failure occurs by pulling out a concrete cone formed by circumferential crack growth in the so-called mixed mode, with significant size effect. Numerical analyses indicate that the dominant influence factor on the failure load is the concrete fracture energy. It is shown that in such applications, the load transfer from the anchor into the concrete may safely be done by using the concrete tensile strength. nBefestigungselemente wie Kopfbolzen werden haufig eingesetzt, um Lasten in Stahlbetontragwerke einzuleiten. Versuche zeigen, dass das Versagen bei ausreichend hoher Stahltragfahigkeit durch die Ausbildung eines Betonausbruchkegels hervorgerufen wird. Die Bruchlast hangt nach den Ergebnissen der numerischen Untersuchungen hauptsachlich von der Betonbruchenergie ab. Es wird diskutiert, dass in diesen Anwendungsfallen die Betonzugfestigkeit in Anspruch genommen werden kann, ohne dass ein Sicherheitsrisiko besteht.
Archive | 1990
Josko Ozbolt; Rolf Eligehausen
Archive | 1994
Josko Ozbolt; Rolf Eligehausen; Mario Petrangeli
Proc. of the Second International Conference on Fracture and Damage of Concrete and Rock, Vienna, Austeria | 1993
Josko Ozbolt; Rolf Eligehausen
Archive | 1991
Josko Ozbolt; Rolf Eligehausen
ECF8, Torino 1990 | 1990
Rolf Eligehausen; Josko Ozbolt
Archive | 1994
Josko Ozbolt; Rolf Eligehausen
Archive | 1992
Josko Ozbolt; Rolf Eligehausen
Archive | 1992
Josko Ozbolt; Rolf Eligehausen