scholarly journals Modeling of the Axial Load Capacity of RC Columns Strengthened with Steel Jacketing under Preloading Based on FE Simulation

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Ahmed M. Sayed ◽  
Hesham M. Diab
Keyword(s):  
Axial Load ◽  
Failure Modes ◽  
Fe Simulation ◽  
Load Capacity ◽  
Three Dimensional ◽  
Fe Model ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Rc Columns ◽  
Axial Load Capacity

Reinforced concrete (RC) columns often require consolidation or rehabilitation to enhance their capacity to endure the loads applied. This paper aims at studying the conduct and capacity of RC square columns, those reinforced with steel jacketing under static preloads. For this purpose, a three-dimensional model of finite element (FE) is devised mainly to investigate and analyze the effect of this case. The model was tested and adjusted to ensure its accuracy using the previous experimental results obtained by the author. Results of testing, experimentally, the new developed FE model revealed the ability to use the model for calculating RC columns’ axial load capacity and for predicting accurate failure modes. The new model that tends to predict the axial load capacity was suggested considering the parametric analysis results.

EFFECT OF ASPECT RATIO ON THE BEHAVIOR OF GFRP-RC CIRCULAR COLUMNS UNDER SIMULATED SEISMIC LOADING

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Amr Elsayed Mohammed Abdallah ◽  
Ehab Fathy El-Salakawy
Keyword(s):  
Aspect Ratio ◽  
Axial Load ◽  
Load Capacity ◽  
Load Level ◽  
Experimental Results ◽  
Rc Columns ◽  
Drift Capacity ◽  
Glass Fiber Reinforced ◽  
Axial Load Capacity ◽  
Code Provisions

The mechanical and physical properties of glass fiber-reinforced polymer (GFRP) reinforcement are different from steel, which requires independent code provisions for GFRP-reinforced concrete (RC) members. The currently available code provisions for GFRP-RC members still need more research evidence to be inclusive. For example, the available provisions for confinement reinforcement of FRP-RC columns do not consider the effects of column aspect ratio, which is not yet supported by any available research data. In this study, two full-scale spirally reinforced GFRP-RC circular columns were constructed and tested under concurrent seismic and axial loads. Both specimens had an aspect ratio (shear span-to-diameter ratio) of 7.0, while other two specimens with an aspect ratio of 5.0, from a previous stage of this study, were included for comparison purposes. For each aspect ratio, each specimen was loaded under one of two levels of axial load; 20 or 30% of the axial load capacity of the column section. All test specimens had a 35 MPa concrete compressive strength, 350-mm diameter, 85-mm spiral pitch and 1.2% longitudinal reinforcement ratio. The experimental results were analyzed in terms of hysteretic response, drift capacity and inelastic deformability hinge length. Based on the experimental results, it can be concluded that the aspect ratio affects the magnitude of secondary moments and inelastic deformability hinge length. In addition, the aspect ratio may affect drift capacity of GFRP-RC columns, depending on axial load level.

Finite Element Analysis of Load Capacity on Coupling Clamps for Pipe

2012 ◽  
Vol 201-202 ◽  
pp. 741-744 ◽  
Author(s):  
Zhen Ning Hou ◽  
Jun Wu ◽  
Qing Wang ◽  
Hong Gen Tian ◽  
Nan Chao ◽  
...  
Keyword(s):  
Finite Element ◽  
Stress Intensity ◽  
Optimization Design ◽  
Load Capacity ◽  
Three Dimensional ◽  
Process Conditions ◽  
Fe Model ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Element Approach

A finite element approach based on Ansys is developed to simulate stress intensity distribution in a three dimensional model of coupling clamp joint, which includes ferrules, pipe caps and bolts. The characteristics of stress intensity distributions of coupling clamp joint under strength pressure loading have been studied by means of the non-linear finite element method. The FE model can also predict the clamp quality and tolerances to be expected under different process conditions and define the most effective process parameters to influence the tolerances. The study could give us a better understanding on the mechanism and basis for optimization design of the coupling clamp joint.

scholarly journals Load and thermal resistance of sandwitched steel-wood composite walling systems infilled with innovative commercial form material

2021 ◽  
Author(s):  
Ashok Kumar Yadov
Keyword(s):  
Axial Load ◽  
Failure Modes ◽  
Oriented Strand Board ◽  
Load Capacity ◽  
Width Ratio ◽  
Height Ratio ◽  
Deformation Response ◽  
Axial Load Capacity ◽  
Composite Wall ◽  
Commercial Form

This research investigated the behaviour of sandwich profiled steel sheet composite wall (PSSCW) and oriented strand board composite wall (OSBCW) with infill commercial form material (CFM). The axial load behaviour of PSSCWs and OSBCWs having different height to width ratio and PSS/OSB-CFM connector spacing was analysed based on experimental results of strength, load-deformation response, load-strain development and failure modes. In addition, flexural behaviour of OSBCW and the thermal conductivity tests on PSSCW and OSWCW specimens were carried-out. The axial load capacity of PSSCW/OSSCW was increased by 946% to 1714% compared to walls without in-fill and decreased with the increase of height to width and connector spacing to height ratio. The existing analytical equations were found to over predict the axial load capacity of both PSSCWs and OSBCWs. The recommendation of this research will understand the axial, flexural and thermal behaviour of PSSCW/OSBCW with CFM infill for practical building applications.

scholarly journals A Finite Element Analysis to Compare Stress Distribution on Extra-Short Implants with Two Different Internal Connections

2019 ◽  
Vol 8 (8) ◽  
pp. 1103 ◽  
Author(s):  
García-Braz ◽  
Prados-Privado ◽  
Zanatta ◽  
Calvo-Guirado ◽  
Prados-Frutos ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Axial Load ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Stress Concentrations ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Short Implants

Background: The goal of this study was to analyze the stress distribution on two types of extra-short dental implants with 5 mm of length: An internal hexagon (IH) and morse taper connection (MT). Methods: The three-dimensional model was composed of trabecular and cortical bone, a crown, an extra-short dental implant and their components. An axial load of 150 N was applied and another inclined 30° with the same magnitude. Results: Stress concentrations on the IH implant are observed in the region of the first threads for the screw. However, in the MT implant the highest stress occurs at the edges of the upper implant platform. Conclusions: In view of the results obtained in this study the two types of prosthetic fittings present a good stress distribution. The Morse taper connections presented better behavior than the internal in both loading configurations.

scholarly journals Load and thermal resistance of sandwitched steel-wood composite walling systems infilled with innovative commercial form material

2021 ◽  
Author(s):  
Ashok Kumar Yadov
Keyword(s):  
Axial Load ◽  
Failure Modes ◽  
Oriented Strand Board ◽  
Load Capacity ◽  
Width Ratio ◽  
Height Ratio ◽  
Deformation Response ◽  
Axial Load Capacity ◽  
Composite Wall ◽  
Commercial Form

This research investigated the behaviour of sandwich profiled steel sheet composite wall (PSSCW) and oriented strand board composite wall (OSBCW) with infill commercial form material (CFM). The axial load behaviour of PSSCWs and OSBCWs having different height to width ratio and PSS/OSB-CFM connector spacing was analysed based on experimental results of strength, load-deformation response, load-strain development and failure modes. In addition, flexural behaviour of OSBCW and the thermal conductivity tests on PSSCW and OSWCW specimens were carried-out. The axial load capacity of PSSCW/OSSCW was increased by 946% to 1714% compared to walls without in-fill and decreased with the increase of height to width and connector spacing to height ratio. The existing analytical equations were found to over predict the axial load capacity of both PSSCWs and OSBCWs. The recommendation of this research will understand the axial, flexural and thermal behaviour of PSSCW/OSBCW with CFM infill for practical building applications.

Design and Simulation of the Exoskeleton Robot

2013 ◽  
Vol 791-793 ◽  
pp. 1199-1202
Author(s):  
Chao Wang ◽  
Yu Lin Wang ◽  
Ming Ma
Keyword(s):  
Mechanism Design ◽  
Load Capacity ◽  
Three Dimensional ◽  
Dynamics Analysis ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Exoskeleton Robot ◽  
Wearable Exoskeleton ◽  
Heavy Loads ◽  
Future Work

In order to significantly improve the load capacity of the soldiers and the maneuverability as carrying heavy loads, the mechanism design and simulation of the wearable exoskeleton robot are studied in this paper. Firstly, the mechanism design of the exoskeleton robot is completed and the three-dimensional model of the exoskeleton robot is established. Then, the five-link mathematical model of the exoskeleton robot is established, the dynamics analysis of which is proceed. Finally, through using virtual prototype technology, the walking simulation of the robot is carried out and the results provide a basis for the future work.

Axial Load Capacity of Cold Formed Pipe Flange Connection

2017 ◽  
Vol 139 (5) ◽  
Author(s):  
Jan Henriksen ◽  
Michael R. Hansen ◽  
Fredrik Christopher Thrane
Keyword(s):  
Experimental Data ◽  
Axial Load ◽  
Load Capacity ◽  
Fe Model ◽  
Forming Process ◽  
Cold Forming ◽  
Flange Connection ◽  
Fe Simulations ◽  
Axial Load Capacity ◽  
Set Up

In this paper, a cold forming process is used where the connection between a pipe and a flange is created by means of radially expanding tool segments inside the pipe. The method is investigated with two purposes, to set up a robust procedure for the process that allows for connections to be made on site, and to set up finite element (FE) simulations that can capture the forces and deformations when pulling the pipe axially out of the flange. Experimental data and FE simulations are used to describe and understand the forces and deformations during the connection process. The rapid increase in radial stiffness experienced when the pipe comes in full circumferential contact with the flange is identified as the best end-of-process indicator. Also, experimental data and FE simulations are used to predict the axial load capacity of a pipe flange connection, and the FE model is utilized in designing the appropriate ridge height of the tool segments.

Comparative study of Y-shaped and circular floating piles in consolidating clay

2016 ◽  
Vol 53 (9) ◽  
pp. 1483-1494 ◽  
Author(s):  
Yaru Lv ◽  
Charles W.W. Ng ◽  
Sze Yue Lam ◽  
Hanlong Liu ◽  
Xuanming Ding
Keyword(s):  
Bearing Capacity ◽  
Axial Load ◽  
Load Capacity ◽  
Limit State ◽  
Three Dimensional ◽  
Axial Loads ◽  
Axial Load Capacity ◽  
Lateral Extent ◽  
Adjacent Soil ◽  
Geometrical Effects

Although engineers often make use of pile geometry to improve the axial load capacity of piles, geometrical effects on floating piles in consolidating clay are still not fully understood. This paper reports two centrifuge model tests to investigate the responses of a Y-shaped pile and a circular pile subjected to an induced dragload and applied axial loads. Three-dimensional numerical back-analyses were performed considering the elastoplastic slip. The Y-shaped and circular piles developed similar downdrag, but the dragload induced on the Y-shaped pile was larger than that induced on the circular pile. As the axial load increased, the neutral plane shifted upward along a nonlinear path, of which the gradient of the Y-shaped pile was gentler. The ultimate bearing capacity of the Y-shaped pile was 1.73 times that of the circular pile. The dragload on the Y-shaped and circular piles was eventually eliminated at approximately 0.56 and 0.83 times the corresponding ultimate pile capacities, respectively. Three flanges of the Y-shaped pile “hung-up” adjacent soil that settled together with the pile shaft. The lateral extent of vertically nonuniform trapped soil decreased with increasing axial load. Even though the Y-shaped and circular piles encountered a similar serviceability limit state, Y-shaped pile had advantages in bearing capacity.

Sign in / Sign up

Export Citation Format

Share Document