Options
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
Place of Title Granting Institution
Hamburg
Examination Date
2014-11-05
Institut
TORE-DOI
First published in
Schriftenreihe des Instituts für Massivbau der TUHH;12
Number in series
12
Publisher
Shaker Verlag
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.
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.
Subjects
Zuggurtmodell, Tension Stiffening, Rissbreiten, Modellierung von Stahlbeton
DDC Class
620: Ingenieurwissenschaften
Loading...
Name
3-8440-3376-9_DOK.pdf
Size
1.56 MB
Format
Adobe PDF