A parametric study of flexible micro-perforated panels with a patch-impedance numerical model

2017 ◽  
Vol 141 (5) ◽  
pp. 3797-3797
Author(s):  
Muttalip A. Temiz ◽  
Jonathan Tournadre ◽  
Ines Lopez Arteaga ◽  
Avraham Hirschberg
Keyword(s):  
Numerical Model ◽  
Parametric Study

scholarly journals Pyrolysis in Porous Media: Numerical model and parametric study.

2012 ◽  
Author(s):  
L. Romagnosi ◽  
N. Gascoin ◽  
E. El-Tabach ◽  
C. Strozzi ◽  
I. Fedioun ◽  
...  
Keyword(s):  
Porous Media ◽  
Numerical Model ◽  
Parametric Study

A parametric study on the isolation of ground‐borne noise and vibrations in a building using a coupled numerical model

2008 ◽  
Vol 123 (5) ◽  
pp. 3260-3260
Author(s):  
Péter Fiala ◽  
Shashank Gupta ◽  
Geert Degrande ◽  
Fülöp Augusztinovicz
Keyword(s):  
Numerical Model ◽  
Parametric Study ◽  
Coupled Numerical Model

scholarly journals Numerical Modelling and Simulation of the In-Plane Response of a Three-Storey Masonry-Infilled RC Frame Retrofitted with TRM

2020 ◽  
Vol 2020 ◽  
pp. 1-19
Author(s):  
Christiana A. Filippou ◽  
Nicholas C. Kyriakides ◽  
Christis Z. Chrysostomou
Keyword(s):  
Sensitivity Analysis ◽  
Finite Element ◽  
Numerical Model ◽  
Parametric Study ◽  
Shear Capacity ◽  
Numerical Results ◽  
Rc Frame ◽  
Masonry Infill ◽  
Infilled Frame ◽  
Gap Opening

A numerical study was conducted to investigate the in-plane behavior of a masonry-infilled reinforced concrete (RC) frame retrofitted with textile-reinforced mortar (TRM). A two-dimensional finite element model was developed using DIANA finite element analysis (FEA) software to simulate the 2 : 3 scaled three-storey masonry-infilled RC frame retrofitted with TRM that was studied experimentally in the past. The three-storey structure used in the test was with a nonseismic design and detailing, and was subjected to in-plane displacement-control cyclic loading. The current study evaluates the capabilities of a representative numerical model to simulate the results of the experimental test, and after the calibration of the numerical model sensitivity analysis and parametric study were performed. In order to create an accurate numerical model, suitable constitutive models, based on the smeared crack approach, were used to characterize the nonlinear response of concrete, masonry infill, and TRM. The calibration of the models was based on the experimental results or inverse fitting based on optimizing the simulation of the response. The numerical model proved capable of simulating the in-plane behavior of the retrofitted masonry-infilled RC frame with good accuracy in terms of initial stiffness, and its deterioration, shear capacity, and cracking patterns. The calibrated model was then used to perform sensitivity analysis in order to examine the influence of infill-frame interface properties (tangential and normal stiffness) on the behavior of the retrofitted infilled frame. The numerical results showed that the gap opening is influenced significantly by the stiffness of the interface. In addition, a parametric study was performed in order to evaluate the importance of the full-bond condition between the TRM and the masonry-infilled RC frame. The numerical results indicate that the composite action between the TRM and the masonry-infilled RC frame improves the global stiffness and lateral resistance of the infilled frame, and it reduces the gap opening between the masonry infill and the RC frame.

Design of built-up steel beam-columns composed of two-channel sections

2020 ◽  
Author(s):  
George Iskander ◽  
Emam Soliman ◽  
Ezzeldin Yazeed Sayed-Ahmed
Keyword(s):  
Experimental Investigation ◽  
Numerical Model ◽  
Experimental Work ◽  
Parametric Study ◽  
Design Method ◽  
Steel Beam ◽  
Fe Model ◽  
Beam Columns ◽  
Initial Imperfections ◽  
Good Agreement

Built-up columns composed of two chords present an ideal design for long columns subject to high straining actions. The objective of this paper is to investigate the capacity of built-up columns composed of two-channel sections subjected to eccentric loading and propose a design method for them. A nonlinear numerical FE model is developed for these columns and verified against experimental investigation available from literature; the model includes both the geometric and materials nonlinearities along with the effect of initial imperfections. The model is used to perform a parametric study to investigate the effect of different factors on the built-up columns’ capacity. The results of the parametric study are also used to propose a design method for these columns. A limited experimental investigation is performed on two eccentrically loaded built-up columns, the results of experimental work showed good agreement with the numerical model results and the proposed design method.

scholarly journals Comparison of Experimentally Measured Deformation of the Plate on the Subsoil and the Results of 3D Numerical Model

2014 ◽  
Vol 14 (1) ◽  
pp. 57-66 ◽  
Author(s):  
Jana Labudková ◽  
Radim Čajka
Keyword(s):  
Finite Element ◽  
Numerical Model ◽  
Boundary Conditions ◽  
Parametric Study ◽  
3D Model ◽  
3D Elements ◽  
Final Deformation ◽  
Measured Deformation ◽  
3D Numerical Model

Abstract The purpose of this paper is to compare the measured subsidence of the foundation in experiments and subsidence obtained from FEM calculations. When using 3D elements for creation of a 3D model, it is, in particular, essential to choose correctly the size of the modelled area which represents the subsoil, the boundary conditions and the size of the finite element network. The parametric study evaluates impacts of those parameters on final deformation. The parametric study is conducted of 168 variant models.

scholarly journals Experimental and Numerical Studies on Thermally-Induced Slip Ratcheting on a Slope

2020 ◽  
Vol 6 (1) ◽  
pp. 5
Author(s):  
Sihyun Kim ◽  
Seunghee Kim ◽  
Jingtao Zhang ◽  
Ethan Druszkowski ◽  
Abdallah Sweidan
Keyword(s):  
Numerical Model ◽  
Parametric Study ◽  
Temperature Increase ◽  
Temperature Fluctuation ◽  
Structural Instability ◽  
Neutral Point ◽  
Thermally Induced ◽  
Temperature Changes ◽  
Numerical Studies ◽  
Mild Temperature

Mild temperature fluctuation of a material sitting on a slope may only cause a small slip, but a large number of the repeated temperature changes can amplify the magnitude of the overall slip and eventually bring an issue of structural instability. The slip accumulation starts from the minor magnitude and reaches the extensive level called “slip ratcheting”. Experimental evidence for such thermally-induced slip ratcheting is first provided in this work. It is implemented with an acryl sheet placed on an inclined wood with a mild angle; it is found that the temperature fluctuation of the acryl sheet causes the sheet to slide down gradually without any additional loading. The numerical model is then attempted to emulate the major findings of the experiments. From the simulation work, the location of a neutral point is found when the acryl plate is heated, and another neutral point is observed when cooled down. The shift of the neutral point appears to be a major reason for the unrecovered slip after a temperature increase and decrease cycle. Finally, a parametric study using the numerical model is carried out to examine which parameters play a major role in the development of residual slips.

scholarly journals Modeling Deflection in Reinforced Concrete One-way Slabs using Eurocode2 Model

2021 ◽  
Vol 9 (1) ◽  
pp. 91-95
Author(s):  
Nehal Ibrahim ◽  
Mohammed A. Kabosh ◽  
Amged O. Abdelatif
Keyword(s):  
Reinforced Concrete ◽  
Numerical Model ◽  
Parametric Study ◽  
Nonlinear Effect ◽  
Experimental Results ◽  
Slab Thickness ◽  
Simply Supported ◽  
Matlab Program

This paper examines the validity of Euro code (EC2) method for modeling deflection in reinforced concrete one-way slabs. A numerical model which incorporates nonlinear effect due to cracking has been developed. A MATLAB program has been developed to implement the model. The performance of the model has been validated against experimental results in literature. The results show that the model is capable of predicting the deflection of simply supported reinforced concrete one- way slabs. A parametric study has then been carried out to quantify the influence of relevant parameters on slabs deflection. It has been found that most significant factor affecting deflection is the slab thickness.  

Comparison of Measured Displacement of the Plate in Interaction with the Subsoil and the Results of 3D Numerical Model

2014 ◽  
Vol 1020 ◽  
pp. 204-209 ◽  
Author(s):  
Jana Labudková ◽  
Radim Čajka
Keyword(s):  
Numerical Model ◽  
Finite Elements ◽  
Parametric Study ◽  
Static Solution ◽  
Nonlinear Behaviour ◽  
3D Numerical Model ◽  
Measured Displacement ◽  
Subsoil Model ◽  
Foundation Structure ◽  
Selection Of

In the context with the solution of interaction of foundation structures and subsoil is complexity of a static solution given mainly by selection of a computational model, effects of physical-nonlinear behaviour of such structure and co-effects of the upper structure and the foundation structure. The purpose of this paper is to compare subsidence of the foundation measured during the experiment and numerical calculations based on FEM. This paper describes how calculated deformations depend on parameters of subsoil modelled by 3D finite elements. The parametric study includes charts of the dependence of resulting deformation on the choice of boundary conditions, on the size of the modeled area represents the subsoil, on the depth of 3D subsoil model and the size of the ground area 3D subsoil model.

scholarly journals Nonlinear Finite Element Modelling and Parametric Study of Prestressed Steel Box Girder

2021 ◽  
Author(s):  
Mahgoub Elhaj Mahgoub Kambal ◽  
Mohammed Awad ◽  
Malik Mohammed Ali
Keyword(s):  
Numerical Model ◽  
Mechanical Behavior ◽  
Parametric Study ◽  
Box Girder ◽  
Plate Girders ◽  
Force Magnitude ◽  
Prestressing Force ◽  
Steel Box Girder ◽  
External Tendons ◽  
Strengthening Technique

Abstract The prestressing technique is easy to apply and is generally used to strengthen steel bridges and controls their gross deflection. ANSYS has been used to establish a numerical model for the mechanical behavior of a steel box girder and prestressed by external tendons. In this paper, steel plate girders with and without strengthening technique was tested to assess the effectiveness of this technology. The results showed that prestressing improves the mechanical behavior of a girder and that its effect is proportional to magnitude of the applied external load. The results of the numerical model showed good agreement with the experimental data. A full-course simulation was conducted with ANSYS for a parametric study to analyze the influence of prestressing force magnitude, span-height ratio, and tendon configurations in increasing the effectiveness of prestressed technique.

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