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Bond Behavior of Reinforcement Subject to Sustained Loading in Normal and Lightweight Concrete

• ID:

  594

• ESCSI:

  4251.031

• Author:

  Janovic, Kassian

• Publication Name:

  Deutsch Ausschuss Stahlbeton

• Type of Publication:

  Journal

• Publisher:

  Technische Universitaet Muenchen, Munich, Germany

• Dated:

  1986

• Issue/Volume:

  No. 367

• Other ID:

• Page(s):

  5-43

• Reference List:

  Y

• Abstract:

  In this paper the bond behavior of reinforcement under conditions prevailing in practice (multi-axial tension stress of the concrete around the reinforcement bar, small concrete covering, short-term and sustained loading) is described. The main results are: It is almost impossible to describe the dependent of bond $tau$ //v and slip $DELTA$ of a reinforced bar by means of a general bond/slip function. The usual concrete covering for normal concrete is not sufficient for lightweight concrete to withstand the splitting forces. To minimize the occurrence of longitudinal cracks due to the splitting forces in concrete, it would be advantageous to reduce the specified relative ribbed area. For the concrete coverings used in practice, the theory of linear creep shows in most cases that the increase of slip in time is too low. In German.