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Mindestbewehrung zur Begrenzung der Rissbreite unter Berücksichtigung des tatsächlichen Bauteilverhaltens - Teil 2: Anwendung für Wände auf Fundamenten und Abgrenzung zum Risskraftnachweis nach EC2

Author(s):

Medium: journal article
Language(s): German
Published in: Beton- und Stahlbetonbau, , n. 4, v. 111
Page(s): 210-220
DOI: 10.1002/best.201500072
Abstract:

Minimum reinforcement for crack width control considering the real member behaviour

It is standard practice to determine the minimum reinforcement for crack width control on base of centric restraint due to concrete hardening. Although this concept gives straightforward results, it can only be seen as a pragmatic solution which is generally not on the safe side. In detail, this simplification neglects the deformation compatibility and considers therefore not the real member behaviour. As a result of this, structural damage - especially in form of leakage in watertight constructions - often occurs.
A detailed presentation of the weakness of this empirically modified cracking force approach can be found in [1]. However, the mechanically consistent determination of the minimum reinforcement for crack width control can be achieved by considering the deformation compatibility of the restrained member, see [2].
The previous first part of this contribution [3] presented the general application of the deformation-based design concept and its particular application in case of "ground slabs". The following second part presents the particular application in case of "walls on foundations" as well as a direct comparison with results from a cracking force-based minimum reinforcement design according to current design standards.
Altogether, the introduced approach reduces the empiricism of minimum reinforcement design significantly. The main reason is the verification of deformation compatibility along the member length. In contrast, however, the cracking force-based minimum reinforcement design according to EC2 [4] solely verifies the equilibrium in a cross section.

Keywords:
foundations crack formation hydration dimensioninig walls restraint
Available from: Refer to publisher
Structurae cannot make the full text of this publication available at this time. The full text can be accessed through the publisher via the DOI: 10.1002/best.201500072.
  • About this
    data sheet
  • Reference-ID
    10073013
  • Published on:
    27/06/2016
  • Last updated on:
    27/06/2016
 
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