Finite Element Model Verification of Buckling Restrained Brace With Nonlinear Behavior

2021 ◽  
Vol 21 (2) ◽  
pp. 81-88
Author(s):  
Dae-Hong Kim ◽  
◽  
Jung-Han Yoo
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Nonlinear Behavior ◽  
Element Model ◽  
Model Verification ◽  
Buckling Restrained Brace

scholarly journals On the Adequacy of Shell Models for Predicting Stresses and Strains in Thick-Walled Tubes Subjected to Detonation Loading

2013 ◽  
Author(s):  
Neal P. Bitter ◽  
Joseph E. Shepherd
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Shell Model ◽  
Wall Thickness ◽  
Axial Strain ◽  
Nonlinear Behavior ◽  
Element Model ◽  
Shell Models ◽  
Axial Curvature ◽  
Detonation Loading

This paper analyzes the adequacy of shell models for predicting stresses and strains in thick-walled tubes subjected to detonation loads. Of particular interest are the large axial strains which are produced at the inner and outer surfaces of the tube due to bending along the tube axis. First, comparisons between simple shell theory and a static finite element model are used to show that the axial strain varies proportionally with wall thickness and inversely with the square of the axial wavelength. For small wavelengths, this comparison demonstrates nonlinear behavior and a breakdown of the shell model. Second, a dynamic finite element model is used to evaluate the performance of transient shell equations. This comparison is used to quantify the error of the shell model with increasing wall thickness and show that shell models can be inaccurate near the load front where the axial curvature is high. Finally, the results of these analyses are used to show that the large axial strains which are sometimes observed in experiments cannot be attributed to through-wall bending and appear to be caused instead by non-ideal conditions present in the experiments.

scholarly journals Modeling the flexural behavior of corroded reinforced concrete beams with considering stirrups corrosion

2020 ◽  
Vol 14 (3) ◽  
pp. 26-39
Author(s):  
Nguyen Ngoc Tan ◽  
Nguyen Trung Kien
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Limit State ◽  
Nonlinear Behavior ◽  
Element Model ◽  
Reinforced Concrete Beams ◽  
Flexural Behavior ◽  
Bending Test ◽  
Fe Model

The reinforcement corrosion is one of the most dominant deterioration mechanisms of existing reinforced concrete structures. In this paper, the effects of the stirrup corrosion on the structural performance of five corroded beams have been simulated using the finite element model with DIANA software. These tested beams are divided into two groups for considering different inputs: (i) without corroded stirrups in flexural span, (ii) with locally corroded stirrups at different locations (e.g. full span, shear span, middle span). FE model has been calibrated with experimental results that were obtained from the four-point bending test carried out on the tested beams. This study shows that the stirrups corrosion should be received more attention in the serviceability limit state since its considerable effect on flexural behavior. Based on a parametric study, it shows that the effect of the cross-section loss of tension reinforcements on the load-carrying capacity of the corroded beam is more significant than the bond strength reduction. Keywords: reinforced concrete; beam; stirrup corrosion; finite element model; flexural nonlinear behavior.

scholarly journals Nonlinear joint model updating using static responses

2016 ◽  
Vol 8 (12) ◽  
pp. 168781401668265 ◽  
Author(s):  
Ping-Ping Yuan ◽  
Zuo-Cai Wang ◽  
Wei-Xin Ren ◽  
Xia Yang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Objective Function ◽  
Model Updating ◽  
Nonlinear Behavior ◽  
Element Model ◽  
Joint Model ◽  
Joint System ◽  
Structural Joint ◽  
Nonlinear Joint

Nonlinear behavior is often observed in structural joint system due to external loads. A new technique of nonlinear structural joint model updating with static load test results is proposed in this article to investigate the actual behavior of a joint system. To calibrate the nonlinear parameters of the structural joint system, an appropriate finite element model is first established to characterize the complex nonlinear behavior caused by the joint connections. Combined with the sensitivity analysis, the parameters that describe the nonlinear behavior of the joint connections are selected as the parameters to be updated. Subsequently, an objective function is created in accordance with the residual between experimentally measured static deflections and analytically calculated static deflections through finite element model. The objective function is then optimized to obtain the proper values of the nonlinear force–displacement parameters with the regular simulated annealing algorithm. To validate the efficiency of this updating approach, two numerical examples under static concentrated loads are conducted. The obtained results indicate that the nonlinear joint model parameters can be successfully updated, and the updated new model can further forecast the true deflections of the nonlinear structure with good accuracy and stability.

scholarly journals Element Modeling of Masonry Wall With Opening Under Lateral Force

2018 ◽  
Vol 1 (2) ◽  
pp. 71
Author(s):  
Danna Darmayadi ◽  
Muhamad Rusli Ahyar
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Three Dimensional ◽  
Element Model ◽  
Lateral Force ◽  
Masonry Wall ◽  
Model Verification ◽  
Dimensional Finite Element ◽  
Parametric Studies ◽  
Three Dimensional Finite Element

Abstract: Three-dimensional Finite Element Model for Masonry Wall with openings under lateral force using ABAQUS software. Finite element model verification with an experiment masonry wall in the laboratory without openings. The load-displacement relationship of finite element model is well agreed with experimental results. Parametric studies conducted on masonry wall with openings to investigate the influence of an area of openings. This research aimed to investigate the behavior of Masonry Walls with openings under lateral force. The result showed that the increase of the area of openings decreases stiffness and strength of masonry. It is also well observed from the result that lateral resistance of masonry will decrease for each area of the opening wall.

Effective stiffness of postbuckled stiffened metallic panels under combined compression and shear stress

2003 ◽  
Vol 38 (6) ◽  
pp. 539-555 ◽  
Author(s):  
M Heitmann ◽  
P Horst ◽  
D Fitzsimmons
Keyword(s):  
Finite Element ◽  
Shear Stress ◽  
Finite Element Model ◽  
Pure Shear ◽  
Element Model ◽  
Model Verification ◽  
Effective Stiffness ◽  
Test Facility ◽  
The One ◽  
Metallic Panels

The paper deals with the analysis of the effective stiffness of stiffened metallic panels under combined compression and shear stress as used, for example, in aircraft fuselages. The first part presents the realization of the compression and shear test facility in a finite element model. Verification of the finite element model is important for subsequent parameter variations. The second part of the paper presents the approach used to find the effective skin stiffness. On the one hand, a comparison between the results for pure compression stress and the effective width method is made and, on the other hand, the results for pure shear stress are compared with the method of Kuhn. A new approach is derived from the finite element results for combined compression and shear stress. Further parametric studies are necessary to verify the new method.

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