15 Fakultätsübergreifend / Sonstige Einrichtung

Permanent URI for this collectionhttps://elib.uni-stuttgart.de/handle/11682/16

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Institute: search.filters.UBSInstitut.Institut für Werkstoffe im BauwesenAuthor: search.filters.author.Bertero, Vitelmo V.

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    Analytical model for concrete anchorages of reinforcing bars under generalized excitations
    (1982) Ciampi, Vincenzo; Eligehausen, Rolf; Bertero, Vitelmo V.; Popov, Egor P.
    This report presents an analytical model for predicting the behavior of single deformed reinforcing bars embedded in confirmed concrete and subjected to generalized excitations in the range of low cycle fatigue. The model is based on a general local bond stress-slip relationship, derived from the results of an extensive study performed at Berkeley, and on either a bilinear or a simple but sufficiently accurate nonlinear stress-strain relationship for the reinforcing steel bar. An efficient numerical scheme for the integration of the governing differential equation of bond along the embedment length of the bar is presented.
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    Analytical model for deformed bar bond under generalized excitations
    (1981) Ciampi, Vincenzo; Eligehausen, Rolf; Bertero, Vitelmo V.; Popov, Egor P.
    Ein mathematisches Modell zur Berechnung des Verhaltens eines Rippenstabes, verankert in eng verbügeltem Beton und beansprucht durch beliebige zyklische Belastungen hoher Intensität wird erläutert. Es umfasst die Formulierung eines vereinfachten Modells für die Beziehung zwischen örtlicher Verbundspannung und örtlichem Schlupf, das aus umfangreichen, in Berkeley durchgeführten Versuchen abgeleitet wurde; die Benutzung eines einfachen, jedoch ausreichend genauen Modells für das Spannungs-Dehnungs Gesetz des Bewehrungsstahles und die numerische Lösung der Differentialgleichung des Verbundes. Ein Beispiel ist dargestellt und erläutert.
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    Local bond stress-slip relationships of deformed bars under generalized excitations : experimental results and analytical model
    (1983) Eligehausen, Rolf; Popov, Egor P.; Bertero, Vitelmo V.
    This report covers integrated experimental and analytical investigations that permit predicting analytically the local bond stress-slip relationship of deformed reinforcing bars subjected to generalized excitations, such as may occur during the response of reinforced concrete (RIC) structures to severe earthquake ground motions.
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    Hysteretic behavior of deformed reinforcing bars under seismic excitations
    (1982) Ciampi, Vincenzo; Eligehausen, Rolf; Bertero, Vitelmo V.; Popov, Egor P.
    A mathematical model of a deformed bar an anchored in a concrete block, recently developed by the authors, has been generalized to cover the bond conditions found in exterior and interior joints of reinforced concrete frames subjected to severe earthquake loadings. The analytically predicted response compares well with the results of a series of tests conducted in Berkeley for monotonic and cyclic loadings. An extensive numerical investigation has been carried out to show the influence on the anchored bar behavior of different parameters such as: 1) Severity of hysteretic requirements, 2) Characteristics of steel (namely yield stress and strain hardening), 3) anchorage length. The results of this investigation are used to offer some practical recommendations and conclusions.