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Rissbildung in fugenlosen Kaianlagen - ein Berechnungsmodell für massige Bauteile aus Stahlbeton
Citation Link: https://doi.org/10.15480/882.1327
Publikationstyp
Doctoral Thesis
Date Issued
2015-02
Sprache
German
Author(s)
Advisor
Title Granting Institution
Technische Universität Hamburg-Harburg
Place of Title Granting Institution
Hamburg
Examination Date
2014-11-05
Institut
TORE-DOI
First published in
Number in series
Citation
Schriftenreihe des Instituts für Massivbau der TUHH 12: (20015)
Publisher
Shaker Verlag
ISBN
978-3-8440-3376-2
ISBN of container
978-3-8440-3376-2
The thesis contributes to the determination of the effective restraint action in large jointless quays. The focus is on the particular cracking behaviour of the voluminous reinforced concrete superstructures. For this purpose special mechanical models are developed. With those the non-linear material behaviour and bond relation are mapped to reality.
After an introduction about the development of container shipping different types of quays with jointless superstructure are presented. Then the material properties of concrete and steel are described, and their interaction in composite building material is explained in detail. Further, the relevant impacts during casting and use of jointless quays made of reinforced concrete are discussed. From the Tension Chord Model of Marti (1999), a recognized model for the description of the load-bearing and deformation behaviour of slender reinforced concrete structures, an analytical Tension Stiffening Formulation is derived. This can be implemented as a material relationship in finite element models with smeared crack approach.
Since the component dimensions in quays are much larger than in normal building construction, here a different cracking behavior is observable. While the crack pattern
of slender concrete members subjected to tension comprises several through-cracks with moderate crack spacing and widths, the cracking behaviour of massive concrete members is characterized by the development of only few through-cracks accompanied by an assembly of shallow cracks. The propagation of these secondary cracks is limited to the reinforced edge areas (effective tensile zone), so they do not disrupt the total cross section. To account for this special cracking behaviour the Tension Chord Model for Massive Concrete Members (ZGMmB) is developed which explains the origin of primary and secondary cracks using mechanical relations. Based on the findings of slender reinforced concrete members a tension stiffening formulation for massive components is derived from the ZGMmB. This allows for finite element calculations of long jointless quays without modelling the bond between concrete and reinforcement explicitly. Finally, the previously developed models are applied in a comprehensive sample calculation to examine the restraint action in the jointless concrete superstructure of a piled quay taking into account the interaction with the foundation.
After an introduction about the development of container shipping different types of quays with jointless superstructure are presented. Then the material properties of concrete and steel are described, and their interaction in composite building material is explained in detail. Further, the relevant impacts during casting and use of jointless quays made of reinforced concrete are discussed. From the Tension Chord Model of Marti (1999), a recognized model for the description of the load-bearing and deformation behaviour of slender reinforced concrete structures, an analytical Tension Stiffening Formulation is derived. This can be implemented as a material relationship in finite element models with smeared crack approach.
Since the component dimensions in quays are much larger than in normal building construction, here a different cracking behavior is observable. While the crack pattern
of slender concrete members subjected to tension comprises several through-cracks with moderate crack spacing and widths, the cracking behaviour of massive concrete members is characterized by the development of only few through-cracks accompanied by an assembly of shallow cracks. The propagation of these secondary cracks is limited to the reinforced edge areas (effective tensile zone), so they do not disrupt the total cross section. To account for this special cracking behaviour the Tension Chord Model for Massive Concrete Members (ZGMmB) is developed which explains the origin of primary and secondary cracks using mechanical relations. Based on the findings of slender reinforced concrete members a tension stiffening formulation for massive components is derived from the ZGMmB. This allows for finite element calculations of long jointless quays without modelling the bond between concrete and reinforcement explicitly. Finally, the previously developed models are applied in a comprehensive sample calculation to examine the restraint action in the jointless concrete superstructure of a piled quay taking into account the interaction with the foundation.
Subjects
Zuggurtmodell | Tension Stiffening | Rissbreiten | Modellierung von Stahlbeton
DDC Class
620: Ingenieurwissenschaften
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Name
3-8440-3376-9_DOK.pdf
Size
1.56 MB
Format
Adobe PDF