Experimental evaluation of stress concentration factor of welded steel bridge T-joints

2012 ◽  
Vol 70 ◽  
pp. 78-85 ◽  
Author(s):  
X.W. Ye ◽  
Y.Q. Ni ◽  
J.M. Ko
Keyword(s):  
Stress Concentration ◽  
Stress Concentration Factor ◽  
Experimental Evaluation ◽  
Concentration Factor ◽  
Steel Bridge ◽  
T Joints ◽  
Welded Steel

The Parametrical Stress Analysis of Tubular T Joints

1985 ◽  
Vol 107 (4) ◽  
pp. 473-478
Author(s):  
T.-Y. Chen ◽  
B.-Z. Chen ◽  
Y.-Q. Wang
Keyword(s):  
Experimental Data ◽  
Stress Concentration ◽  
Stress Analysis ◽  
Stress Concentration Factor ◽  
Concentration Factor ◽  
Axial Loading ◽  
Geometric Parameters ◽  
T Joints ◽  
Data Tables ◽  
The Relationship

The relationship between the geometric parameters of α, β, γ and τ of tubular T joints and chord stress concentration factor, SCF, has been investigated. With the use of calculated values as well as experimental data tables were compiled for a wide variety of cases when axial loading on the branch is applied. Finally, a probability analysis is given as to the reliability of using a particular SCF value.

The Research on the Stress Concentration Factor of T-Joints Subjected to Axial Load

2010 ◽  
Vol 163-167 ◽  
pp. 460-464 ◽  
Author(s):  
Jia Zhang ◽  
Shu Ying Qu ◽  
Guo Dong Zhang ◽  
Hao Liu
Keyword(s):  
Finite Element Analysis ◽  
Stress Concentration ◽  
Stress Concentration Factor ◽  
Concentration Factor ◽  
Axial Load ◽  
Geometrical Parameters ◽  
Element Analysis ◽  
T Joints ◽  
The Finite Element Analysis ◽  
Abaqus Software

By terms of the numerical modeling of ABAQUS software, the analysis of the stress concentration factor (SCF) of tubular T-joints subjected to axial load is analyzed in this paper. The magnitude and the distribution of the SCF are also obtained. Through the finite element analysis of 816 models, the effect of geometrical parameters on the value and distribution of the SCF is investigated. Then based on these results, the parametric equations of the maximal SCF and SCF distribution for T-joints subjected to axial load are presented. Error analysis of these parametric equations is also carried out.

scholarly journals Analysis of fatigue behavior of welded joints in orthotropic bridge deck using traction structural stress

2019 ◽  
Vol 11 (11) ◽  
pp. 168781401989021 ◽  
Author(s):  
Haibo Yang ◽  
Hongliang Qian ◽  
Ping Wang ◽  
Pingsha Dong
Keyword(s):  
Stress Concentration ◽  
Stress Concentration Factor ◽  
Welded Joints ◽  
Concentration Factor ◽  
Hot Spot ◽  
Fatigue Behavior ◽  
Steel Bridge ◽  
Structural Stress ◽  
Test Results ◽  
Hot Spot Stress

In this study, the fatigue behavior of welded joints in an orthotropic steel bridge is simulated and analyzed. The traction structural stress method is proven to be more accurate and effective, and the predicted results agree well with the test results compared to traditional assessment methods, including the nominal stress, hot-spot stress, and effective notch stress methods. The traction structural stress concentration factor curves of welded joints under cyclic tensile and bending moment loading are obtained. The accuracy and validity of finite-element simulation methods for welded joints in orthotropic steel bridge are verified by comparing simulation results with full-scale tests results. Equivalent nominal stresses predicted by the master S–N curve method based on traction structural stress results agree well with the fatigue test results with small standard deviation. The fatigue behavior of orthotropic steel bridge analysis specifications Eurocode3 and GB50017 is combined with the traction structural stress method using unified traction structural stress concentration factor curves. This approach provides practical guidance for the fatigue behavior design of orthotropic steel bridges.

Experimental and Numerical Investigations on Unstiffened Tubular T-Joints of Offshore Platforms

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
T. S. Thandavamoorthy
Keyword(s):  
Numerical Modeling ◽  
Numerical Analysis ◽  
Stress Concentration ◽  
Ultimate Strength ◽  
Stress Concentration Factor ◽  
Concentration Factor ◽  
Shear Failure ◽  
Failure Pattern ◽  
T Joints ◽  
Numerical Investigations

This paper presents the failure pattern, the ultimate strength, and the stress concentration factor of unstiffened T-joints obtained from experimental and numerical investigations conducted on them under axial brace compression loading. The numerical modeling was performed on the whole joint using ANSYS software package. This modeling has predicted the ultimate strength accurately when compared with that of the conventional modeling of only a portion of the joint. The nominal diameter and thickness of the chord of the unstiffened T-joints were 324 mm and 12 mm, respectively, and the corresponding values of the brace were 219 mm and 8 mm, respectively. The T-joint was approximately one-fourth the size of the largest joints in the platforms built in a shallow water depth of 80 m in the Bombay High field. The bending of the whole chord member combined with punching shear failure due to its ovalization was observed to be the predominant behavior of the unstiffened joint. The numerical analysis has simulated the behavior of the joint as was observed in the experiment and has also helped establish its correct failure pattern. It was also observed in these investigations that the unstiffened joint was stiffer in ovalization mode than in flexural deflection. The results obtained from the numerical modeling were observed, in general, to be in good agreement with that obtained from the testing. The stress concentration factor predicted by the numerical analysis is in close agreement with that measured in the experiment as well as that computed using well established parametric equations.

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