scholarly journals A Numerical Evaluation of Structural Hot-Spot Stress Methods in Rib-To-Deck Joint of Orthotropic Steel Deck

2020 ◽  
Vol 10 (19) ◽  
pp. 6924
Author(s):  
Nouman Iqbal ◽  
Heng Fang ◽  
Ahsan Naseem ◽  
Muhammad Kashif ◽  
Hans De Backer
Keyword(s):  
Hot Spot ◽  
Evaluation Methods ◽  
Single Element ◽  
International Institute ◽  
Hot Spot Stress ◽  
Shell Elements ◽  
Orthotropic Steel Deck ◽  
Deck Plate ◽  
Stress States ◽  
Steel Deck

This study numerically investigates the limitations of structural hot-spot stress (SHSS) methods and proposes a guideline for the calculation of hot-spot stresses, which can be used for the better evaluation of fatigue-related problems. Four different SHSS evaluation methods have been applied to the rib-to-deck (RD) welded joint in orthotropic steel deck (OSD). These methods are used to calculate SHSS at this critical joint utilizing finite element analyses (FEA) based software Siemens NX.12. The limitations and the accuracy of these methods have been observed under different element types and meshing techniques. Moreover, the effect of the nodal-averaging feature is being studied. Two types of governing stresses are produced by the application of Eurocode fatigue load model-4. Essentially, the bending in deck-plate produces highly non-linear stress at the deck-toe, and the membrane effect in rib-plate generates linear stress at the rib-toe. Guidelines are proposed considering different parameters on these two stress states by applying SHSS evaluation methods. In comparison to other SHSS approaches, the International Institute of Welding (IIW) quadratic stress extrapolation (QSE) method shows better results for solid single-element, and the American Society of Mechanical Engineers (ASME) through thickness stress linearization (TTSL) method stands out in solid cubic-mesh technique. In general, shell elements have more consistent SHSS results as compared to solid elements for both stress states.

scholarly journals Comparison of hot spot stress evaluation methods for welded structures

2010 ◽  
Vol 2 (4) ◽  
pp. 200-210 ◽  
Author(s):  
Jae-Myung Lee ◽  
Jung-Kwan Seo ◽  
Myung-Hyun Kim ◽  
Sang-Beom Shin ◽  
Myung-Soo Han ◽  
...  
Keyword(s):  
Hot Spot ◽  
Evaluation Methods ◽  
Hot Spot Stress ◽  
Stress Evaluation ◽  
Welded Structures

scholarly journals Comparison of hot spot stress evaluation methods for welded structures

2010 ◽  
Vol 2 (4) ◽  
pp. 200-210 ◽  
Author(s):  
Jung-Kwan Seo ◽  
Myung-Hyun Kim ◽  
Sang-Beom Shin ◽  
Myung-Soo Han ◽  
June-Soo Park ◽  
...  
Keyword(s):  
Hot Spot ◽  
Evaluation Methods ◽  
Hot Spot Stress ◽  
Stress Evaluation ◽  
Welded Structures

scholarly journals Parametric design and Finite Element Analysis of metallic tanks transporting dangerous goods

2018 ◽  
Vol 188 ◽  
pp. 04003
Author(s):  
Konstantinos Sykaras ◽  
Michail Malikoutsakis ◽  
Minas Loulas ◽  
Athanassios Mihailidis
Keyword(s):  
Finite Element ◽  
Parametric Design ◽  
Hot Spot ◽  
Analytical Calculation ◽  
Automated Analysis ◽  
Surface Model ◽  
International Institute ◽  
Element Analysis ◽  
Hot Spot Stress ◽  
Dangerous Goods

Metallic tanks are widely used for the transportation of dangerous goods. Manufacturers utilize standards in conjunction with European legislation concerning the international carriage (ADR and RID) to specify the minimum design and construction requirements. The analysis of the tank’s attachment to the vehicle is not covered by analytical calculation methods, and only the Finite Element stress analysis can be used prior to manufacture. New ADR amendments demand that the certification authorities conduct stringent examinations that the manufacturer has the ability to perform high quality weldings. Applying the structural strength concept implemented in the International Institute of Welding (IIW) guidelines into the calculation is a protracted task. Aiming at speeding up the procedure, a parametric design and an efficient FE analysis is developed for a LGBF tank. Utilizing parametric design offers sufficient overview of the whole structure, while a supplementary surface model is generated to reduce pre-processing time. The tank is subjected to prescribed load cases, while the meshing directives of the structural hot spot stress concept (SHSSC) according to the IIW recommendations are incorporated in the procedure, in order to assess both the static and fatigue strength of the weld details. Using a multi-compartment LGBF tank as a case study, it is shown that the proposed detailed and automated analysis succeeds in reducing the time and effort needed, as well as in allocating the critical spots, substantially increasing the calculation accuracy.

scholarly journals In Situ Experimental Study on the Behavior of UHPC Composite Orthotropic Steel Bridge Deck

Materials ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 253 ◽  
Author(s):  
Li Su ◽  
Shilei Wang ◽  
Yan Gao ◽  
Jianlei Liu ◽  
Xudong Shao
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Fatigue Cracks ◽  
Steel Bridge ◽  
Orthotropic Steel Deck ◽  
Deck Plate ◽  
In Situ Experiments ◽  
Before And After ◽  
Steel Deck

A novel ultra high performance concrete (UHPC) layer composite orthotropic steel deck was adopted in the construction of a new bridge in China to improve the fatigue performance of the orthotropic steel deck plate and reduce the disease of surface wearing layer. In situ experiments were conducted to study the UHPC layer’s impact on the behavior of the orthotropic steel deck. The test vehicle loads were applied on the deck plate before and after UHPC layer paving, the stresses where fatigue cracks usually occur and the deflections of critical sections were measured. The test results verified that the UHPC composite steel deck system could significantly reduce the stress of the rib-to-deck connection region and the stress at the bottom toe of rib-to-diaphragm weld. In addition, it slightly influenced the performance of U shape rib, girder web-to-deck and diaphragm cutout.

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