- Type of paper
: Paper in journal
Title: Finite element 3D analysis of the slab-column connection
- Authors:
- Blažić, Sergio (167994)
Journal: INŽENJERSKO MODELIRANJE
Number: 3 4
ISSN: 0352-9495
Volume: 5
Year: 5
Pages: from 99 to 106
Number of references: 7
Language: engleski
Summary: This paper presents the results of the three-dimensional
nonlinear finite element analysis of the reinforced concrete slab-column
connections. The shear strength and ductility of interior slab-column
connections with and without shear reinforcement are investigated. The
analysis is performed by the numerical implementation of the general
nonlocal microplane model for concrete into the finite element code. In
this material model, the concrete behaviour is simulated through a number
of plane called microplanes. The microplane model is extended to cycling
loading including the rate effect. The fracture mechanics is introduced by
the use of the nonlocal strain concept. The slab is first loaded by the
service level vertical load, introduced through the normal column force,
followed by ten cycles of the service bending moment introduced through the
shear column force to simulate service level load repetition. The slab is
futher loaded by the bending moment up to failure. The results obtained by
the finite element analysis are compared with the previously published test
results. The numerical results indicate diagonal shear failure mode,
similarly as in the experiment, and a significant influence of the damage
introduced through the cycling loading on the bearing capacity.
Keywords: Concrete, microplane model, cyclic loading, deformation speed, state of cracking, energy localisation, deformation localisation
- Type of paper
: Paper in journal
Title: Micro-planar model of Cyclic Three-axial Behaviour of
Conrete
- Authors:
- Ožbolt, Joško (89560)
- Blažić, Sergio (167994)
Journal: GRAĐEVINAR
Number: 4
ISSN: 0350-2465
Volume: 45
Year: 1993
Pages: from 201 to 209
Number of references: 6
Language: hrvatski
Summary: The paper presents the recently proposed micro-planar model
of concrete which describes its non-linear three-axial behaviour and state
of cracking and is expanded to encompass cycling loadingand impact of
deformation speed. The state in each micro-plane is described by means of
the normal and shear components of deformations. The problem of energy
localisation at a point, as consequence of localisation of deformations due
to softening of material, has been tacled by applying nonlocal continuum.
To illustrate the model, same results of the analysis of the piercing of a
column and a slab are given.
Keywords: Concrete, micro-planar model, cyclic loading, deformation speed, state of cracking, energy localisation, deformation localisation
- Type of paper
: Paper in proceedings
Title: 3D-NUMERICAL ANALYSIS OF THE SLAB-COLUMN CONNECTION
- Authors:
- Ožbolt, Joško (89560)
- Blažić, Sergio (167994)
Proceedings title: Zbornik u štampi
Language: engleski
Place: Viena, Austrija
Year: 1992
Pages: from 0 to 0
Meeting: International conference on fracture and damage of concrete and rock, EFDCR-2 Viena, Austria November, 1992.
Held: from 11/05/92 to 11/10/92
Summary: In the present paper the results of the three-dimensional
nonlinear finite element analysis of the slab-column connections are
reported. The slab is first loaded by the service level vertical (shear)
load, introduced through the normal column
force, and then followed by then cycles of the service bending moment that
is applied through the shear column force. After damage caused by cyclic
loading, the slab is further loaded by vertical load up to the certain
level followed by bending moment up to failure. The analysis is performed
by the use of the general nonlocal microplane model for concrete. In this
fully 3D-cyclic material model, including the rate effect, concrete
behaviour is simulated through a number of planes called microplane. The
fracture mechanics is introduced by the use of the nonlocal strain concept.
Numerical results obtained by the finite element analysis are compared with
previously published test results. Similarly as in the experiment, the
numerical results indicate diagonal shear failure mode and a significant
influence of the damage introduced through the cyclic loading on bearing
capacity of the plate.
Keywords: Microplane model, Cycling, Rate effect, Viscosity, Fracture
- Type of paper
: Computer program
Title: " MPM3S "
- Authors:
- Blažić, Sergio (167994)
Programming language: FORTRAN
Year: 1993
Summary: A programme for the nonlinear nonlocal numerical analysis
of space problems by the finite element method has been worked out. This
programme can be used to analyse reinforced concrete structures. The
connection between stress and strain is described by the microplane model
for concrete, while the reinforced bars are elesto-plastic. The programme
has been made for static monotonous and cyclic loading and for given
displacements. The concept of nonlocal continuum on the microlevel has been
applied. In this concept only the variables associated with material damage
are nonlocal, while all the others are local.
