A simplified and fast computational finite element model for the nonlinear load-displacement behaviour of reinforced concrete structures

2018 ◽  
Vol 194 ◽  
pp. 468-477 ◽  
Author(s):  
S. Benakli ◽  
Y. Bouafia ◽  
M. Oudjene ◽  
R. Boissière ◽  
A. Khelil
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Concrete Structures ◽  
Element Model ◽  
Reinforced Concrete Structures ◽  
Nonlinear Load ◽  
Load Displacement

scholarly journals Development of Practical Finite Element Models for Collapse of Reinforced Concrete Structures and Experimental Validation

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Mario Bermejo ◽  
Anastasio P. Santos ◽  
José M. Goicolea
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Elements ◽  
Finite Element Model ◽  
Computational Cost ◽  
Concrete Structures ◽  
Element Model ◽  
Reinforced Concrete Structures ◽  
Finite Element Models ◽  
Explicit Finite Element

This paper describes two practical methodologies for modeling the collapse of reinforced concrete structures. They are validated with a real scale test of a two-floor structure which loses a bearing column. The objective is to achieve accurate simulations of collapse phenomena with moderate computational cost. Explicit finite element models are used with Lagrangian meshes, modeling concrete, and steel in a segregated manner. The first model uses 3D continuum finite elements for concrete and beams for steel bars, connected for displacement compatibility using a penalty method. The second model uses structural finite elements, shells for concrete, and beams for steel, connected in common nodes with an eccentricity formulation. Both are capable of simulating correctly the global behavior of the structural collapse. The continuum finite element model is more accurate for interpreting local failure but has an excessive computational cost for a complete building. The structural finite element model proposed has a moderate computational cost, yields sufficiently accurate results, and as a result is the recommended methodology.

Behavior of Embedded Steel Plates in Reinforced Concrete: New Design Basis

2003 ◽  
Author(s):  
Sekhar K. Chakrabarti
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Tensile Loading ◽  
Element Model ◽  
Linear Analysis ◽  
Steel Plates ◽  
Reinforced Concrete Structures ◽  
Analysis And Design ◽  
Design Basis

The behavior and capacity of embedded steel plates in reinforced concrete structures, are studied using a finite-element model developed for non-linear analysis. Strength interaction diagrams and moment-rotation charts useful for analysis and design of such plates, are developed for eccentric compressive and eccentric tensile loading, at failure and collapse. Capacities for a common class of embedded plates with variation in its thickness are computed for the cases of combined eccentric compression and shear.

scholarly journals A 3D finite element model for reinforced concrete structures analysis

2011 ◽  
Vol 4 (4) ◽  
pp. 548-560 ◽  
Author(s):  
G. F. F. Bono ◽  
A. Campos Filho ◽  
A. R. Pacheco
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Numerical Model ◽  
Concrete Structures ◽  
Strain Curve ◽  
Uniaxial Stress ◽  
Element Model ◽  
Reinforced Concrete Structures ◽  
Principal Stresses ◽  
Stress Strain

This work presents a numerical model for 3D analyses through the finite element method of reinforced concrete structures subjected to monotonic loads. The proposed model for concrete is orthotropic and uses the equivalent uniaxial strain concept. The equivalent uniaxial stress-strain relation is generalized to take into account the triaxial stress conditions. The parameters used in the equivalent uniaxial stress-strain curve are determined from the failure surface defined in the principal stress space. The implementation in finite elements is based on the consideration of smeared cracks with cracks rotating according to the directions of the principal stresses. Also, an embedded reinforcement model was implemented to represent existent reinforcing bars. Finally, some results are compared with experimental data from the literature to demonstrate the validity of the numerical model developed.

scholarly journals Method of the Finite-Element Model Formation Containing the 3D Elements for Structural Calculations of the Reinforced Concrete Structures Considering the Crack Opening

2021 ◽  
Vol 23 (1) ◽  
pp. D15-D25
Author(s):  
Sergei N. Nazarenko ◽  
Galina A. Grudcina
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Crack Opening ◽  
Concrete Structures ◽  
Analytical Calculation ◽  
Element Model ◽  
Data File ◽  
Reinforced Concrete Beam ◽  
Reinforced Concrete Structures ◽  
3D Elements

This article presents the 3D computational modeling method for reinforced concrete structures. An example of calculation of the reinforced concrete beam, using the Finite Element Method in SCAD++ following proposed algorithm, is given. Results comparison to the analytical calculation of the model with selected reinforcement is presented. For concrete, the 3D solid Finite Elements are used and the 3D beam elements for reinforcement. The model is formed using AutoCAD and AutoLISP, which creates a text data file in SCAD format for the description of model. In addition, computation of the 3D model of the crossbar with a crack is performed. Crack sizes are set in the stretched zone based on data from initial calculation. Graphic results obtained in SCAD++ are presented.

A FINITE ELEMENT APPROACH USING EQUIVALENT PLANE RECTANGULAR TRUSS ELEMENT IN NONLINEAR ANALYSIS OF REINFORCED CONCRETE STRUCTURES

2007 ◽  
Vol 04 (03) ◽  
pp. 383-396 ◽  
Author(s):  
FANGBO WU ◽  
XIANLI DING ◽  
SHAOYAO HE
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Nonlinear Analysis ◽  
Concrete Structures ◽  
Element Model ◽  
Reinforced Concrete Structures ◽  
New Approach ◽  
Finite Element Approach ◽  
Truss Element ◽  
Element Approach

A new finite element approach described in this paper uses an equivalent plane rectangular truss element to replace the traditional plane rectangular element in the nonlinear analysis of reinforced concrete structures. The major advantage of this approach is the simplified finite element model with reduced degrees of freedom and without the need of using displacement functions. The new approach can also trace the formation, development, and location of cracks in the reinforced concrete structures. The results of numerical analyses of structural examples showed that this new approach gave satisfactory results to the engineering problems in comparison with those obtained using the more complicated FE package ANSYS8.0.

scholarly journals Evaluation of the carrying capacity of the building structures in the industrial heritage for its adaptation

2018 ◽  
Vol 146 ◽  
pp. 02003
Author(s):  
Sergej Kudrjavtsev
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Carrying Capacity ◽  
Element Model ◽  
Building Codes ◽  
Reinforced Concrete Structures ◽  
Building Structures ◽  
Industrial Heritage ◽  
Modern Building

The article presents the results of verification calculations of carrying capacity of building structures of “White Tower”. This former water tower is a constructivist monument of state-wide significance and one of the oldest reinforced concrete structures in Yekaterinburg. Currently the design of adaptation of the object as a museum or an exhibition hall is being developed. The purpose of the study is to answer the question: Will the structures of the 1930s withstand the loads regulated by modern building codes? The results of carried out field inspections and a finite-element model of the LIRA-SAPR software are also described. The data of the weakest sections and elements of the structure are presented. The result of the work will allow carrying out a complex of efforts for the restoration of building structures of the object and will help in deciding whether to develop one or another alternative for its adaptation.

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