Masonry Column Reinforced by FRP Wrapping: Behavior and Numerical Analysis

2016 ◽  
Vol 825 ◽  
pp. 27-30 ◽  
Author(s):  
Aneta Maroušková
Keyword(s):  
Numerical Analysis ◽  
Software Package ◽  
Unreinforced Masonry ◽  
Numerical Results ◽  
Experimental Program ◽  
Research Project ◽  
Commercial Software ◽  
Non Linear ◽  
Commercial Software Package ◽  
Frp Wrapping

A numerical analysis for masonry columns is presented in this paper. The behavior and character of deformation of compressed unreinforced masonry columns is investigated and compared with the deformation of masonry columns reinforced by FRP wrapping. The experimental program is part of a research project NAKI [1]. Both, the bricks and the mortar are modeled as 3D continuum and to the interface between these two materials a non-linear contact law is assigned. The contact between reinforcement and masonry support is considered as perfectly-adherent. Two different cases are simulated - the ratio of Young ́s modulus of brick and Young’s modulus of mortar is 5:1, respectively 1:5. For all simulations the commercial software package ABAQUS was used and the obtained numerical results are discussed.

Non-Linear Numerical Analysis of Unreinforced Masonry Column and Masonry Column Reinforced by FRP Wrapping

2016 ◽  
Vol 827 ◽  
pp. 279-282
Author(s):  
Aneta Maroušková
Keyword(s):  
Numerical Model ◽  
Computational Cost ◽  
Unreinforced Masonry ◽  
Analysis Tool ◽  
Non Linear ◽  
Commercial Software Package ◽  
Concrete Damaged Plasticity ◽  
Frp Wrapping ◽  
High Computational Cost ◽  
Masonry Units

A numerical model for unreinforced masonry columns and masonry columns reinforced by FRP wrapping is presented in this paper. Both, the bricks and the mortar are modeled as 3D continuum and to the interface between these two materials a non-linear contact law is assigned. The accurate 3D modeling of masonry units and mortar joints within the numerical model leads to high computational cost, but on the other hand, an appropriate analysis tool delivering detailed information about the behavior of masonry columns is obtained. A concrete damaged plasticity model was adopted for mortar and brick. External wrapping by a perfectly-adherent composite based strips and contact between strips and masonry is defined in the next step. The behavior of reinforcement was assumed isotropic and linearly elastic. The response and failure mechanism of masonry columns can be investigated. For all simulations the commercial software package ABAQUS was used. By comparison with results from experiments [1], the performance of the numerical model is evaluated and the obtained numerical results are discussed.

Inelastic Material Models for Numerical Analysis of Unreinforced Compressed Masonry Columns

2016 ◽  
Vol 677 ◽  
pp. 197-202 ◽  
Author(s):  
Aneta Maroušková
Keyword(s):  
Numerical Analysis ◽  
Software Package ◽  
Experimental Program ◽  
Material Models ◽  
Literature Research ◽  
Future Goals ◽  
Material Characteristics ◽  
Inelastic Material ◽  
Commercial Software Package

This paper deals with numerical analysis of unreinforced compressed masonry column. The experimental program is part of a research project NAKI [1]. Three material models usually used for simulation rock, soil, concrete and other quasi-brittle materials were assumed for numerical modelling of masonry column and mutually compared. The material characteristics were identified based on literature research since the needed mechanical properties were not available. The determination of own material characteristics and comparison numerical simulation with experimental test can be outlined as a future goals. For all simulations the commercial software package ABAQUS was used and the obtained numerical results are discussed.

Calculations of intensities for radiation force modeling with the commercial software package FOCUS.

2010 ◽  
Vol 127 (3) ◽  
pp. 1828-1828
Author(s):  
Robert J. McGough ◽  
Donald J. Vanderlaan ◽  
Alexander Dutch ◽  
Matthew W. Urban
Keyword(s):  
Software Package ◽  
Radiation Force ◽  
Commercial Software ◽  
Force Modeling ◽  
Commercial Software Package

scholarly journals Numerical investigation of hemodynamic performance of a stent in the main branch of a coronary artery bifurcation

Bioimpacts ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 97-103 ◽  
Author(s):  
Seyed Esmail Razavi ◽  
Vahid Farhangmehr ◽  
Zahra Babaie
Keyword(s):  
Shear Stress ◽  
Coronary Artery ◽  
Software Package ◽  
Three Dimensional ◽  
Bare Metal Stent ◽  
Side Branch ◽  
Commercial Software ◽  
Before And After ◽  
Commercial Software Package ◽  
Hemodynamic Performance

Introduction: The effect of a bare-metal stent on the hemodynamics in the main branch of a coronary artery bifurcation with a particular type of stenosis was numerically investigated by the computational fluid dynamics (CFD). Methods: Three-dimensional idealized geometry of bifurcation was constructed in Catia modelling commercial software package. The Newtonian blood flow was assumed to be incompressible and laminar. CFD was utilized to calculate the shear stress and blood pressure distributions on the wall of main branch. In order to do the numerical simulations, a commercial software package named as COMSOL Multiphysics 5.3 was employed. Two types of stent, namely, one-part stent and two-part stent were applied to prevent the build-up and progression of the atherosclerotic plaques in the main branch. Results: A particular type of stenosis in the main branch was considered in this research. It occurred before and after the side branch. Moreover, it was found that the main branch with an inserted one-part stent had the smallest region with the wall shear stress (WSS) below 0.5 Pa which was the minimum WSS in the main branch without the stenosis. Conclusion: The use of a one-part stent in the main branch of a coronary artery bifurcation for the aforementioned type of stenosis is recommended.

scholarly journals EXTRACTING SEMANTICALLY ANNOTATED 3D BUILDING MODELS WITH TEXTURES FROM OBLIQUE AERIAL IMAGERY

2015 ◽  
Vol XL-3/W2 ◽  
pp. 53-58 ◽  
Author(s):  
D. Frommholz ◽  
M. Linkiewicz ◽  
H. Meissner ◽  
D. Dahlke ◽  
A. Poznanska
Keyword(s):  
High Resolution ◽  
Software Package ◽  
Point Clouds ◽  
Aerial Imagery ◽  
Commercial Software ◽  
Camera System ◽  
3D Point Clouds ◽  
Building Models ◽  
Commercial Software Package

This paper proposes a method for the reconstruction of city buildings with automatically derived textures that can be directly used for façade element classification. Oblique and nadir aerial imagery recorded by a multi-head camera system is transformed into dense 3D point clouds and evaluated statistically in order to extract the hull of the structures. For the resulting wall, roof and ground surfaces high-resolution polygonal texture patches are calculated and compactly arranged in a texture atlas without resampling. The façade textures subsequently get analyzed by a commercial software package to detect possible windows whose contours are projected into the original oriented source images and sparsely ray-casted to obtain their 3D world coordinates. With the windows being reintegrated into the previously extracted hull the final building models are stored as semantically annotated CityGML ”LOD-2.5” objects.

scholarly journals Influence of Slenderness on the Evaluation of Epistemic Uncertainty Related to Non-Linear Numerical Analysis of RC Columns

2021 ◽  
Vol 1203 (3) ◽  
pp. 032102
Author(s):  
Diego Gino ◽  
Costanza Anerdi ◽  
Gabriele Bertagnoli ◽  
Luca Giordano ◽  
Giuseppe Marano
Keyword(s):  
Numerical Analysis ◽  
Numerical Model ◽  
Numerical Simulations ◽  
Model Uncertainty ◽  
Epistemic Uncertainty ◽  
Random Variable ◽  
Numerical Results ◽  
Numerical Code ◽  
Rc Columns ◽  
Non Linear

Abstract This investigation is devoted to quantify the epistemic uncertainty related to the nonlinear analysis of reinforced concrete columns characterized by high slenderness using numerical codes. The adoption of refined numerical tools, which are able to consider both mechanical and geometric non linearities, implies to perform assumptions and approximations with respect to reality. Whit reference to reliability analysis, these simplifications lead, inevitably, to additional uncertainties which are of epistemic nature. In fact, these uncertainties may be reduced by the engineers/analysts by increasing the level of refinement of the numerical model and/or increasing knowledge about parameters associated to material models. However, also numerical model established by expert engineers/analysts are affected by this kind of epistemic uncertainty. Accepting that the level of uncertainty associated to the experimental tests set are minimized, the epistemic uncertainty associated to non-linear numerical simulations can be quantified characterizing the model uncertainty random variable comparing the outcomes of numerical results to the associated experimental ones. The present investigation proposes the quantification of the model uncertainty related to non-linear numerical simulations of slender RC columns. A total number of 40 experimental results known from literature are herein selected in coherence with current Eurocodes specifications. The experiments are reproduced adopting non-linear numerical analysis differentiating between several modelling hypotheses (i.e., numerical code; materials models). The comparison between experimental and numerical results is adopted to characterize the most suitable probabilistic model for the model uncertainty random variable associated to non-linear numerical simulations of RC columns subjected to significant slenderness. The outcomes of the research are useful to provide background to the characterization of partial safety factor for model uncertainty in non-linear numerical analysis using the approach of the global resistance format for safety verifications.

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