Design and Application of Large-Scale Cast-Steel Joints for Special-Shape Bridges

2010 ◽  
Vol 2172 (1) ◽  
pp. 66-73 ◽  
Author(s):  
Jianming Ding ◽  
Bingnan Li ◽  
Juan Chen ◽  
Suhua Chen
Keyword(s):  
Large Scale ◽  
Cast Steel ◽  
Special Shape ◽  
Steel Joints ◽  
Design And Application

A Viedma ripening route to an enantiopure building block for Levetiracetam and Brivaracetam

2019 ◽  
Vol 17 (1) ◽  
pp. 35-38 ◽  
Author(s):  
Iaroslav Baglai ◽  
Michel Leeman ◽  
Richard M. Kellogg ◽  
Willem L. Noorduin
Keyword(s):  
Building Block ◽  
Rational Design ◽  
Large Scale ◽  
Enantiomerically Pure ◽  
Ripening Process ◽  
Simple Route ◽  
Chiral Component ◽  
Design And Application

A simple route to enantiomerically pure (S)-2-aminobutyramide – the chiral component of the anti-epileptic drugs Levetiracetam and Brivaracetam has been developed. This approach is based on the rational design and application of a Viedma ripening process. The practical potential of the process is demonstrated on a large scale.

The Application of ABAQUS in Cast-Steel Joints Elastic-Plastic Analysis

2013 ◽  
Vol 351-352 ◽  
pp. 854-859 ◽  
Author(s):  
Fan Wang ◽  
Zhi Feng Luo ◽  
Sheng Hao Mo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cast Steel ◽  
Element Analysis ◽  
Elastic Plastic ◽  
The Finite Element Analysis ◽  
Plastic Analysis ◽  
Reticulated Shell Structure ◽  
Steel Joints ◽  
Cast Steel Joint

The article introduces the application of the large universally used finite element analysis software ABAQUS in elastic-plastic analysis of the cast-steel joints in building structure. Using the cast-steel joint of a large reticulated shell structure in Shenzhen as an example, the article explains how to import the joint model into ABAQUS and start the finite element analysis, and finally get the elastic-plastic analysis results, thus provide the reference for engineering design, analysis and optimize design of cast-steel joints.

Hybrid Design Concept Using High-Strength Cast Steel Inserts for Tubular Joints of Offshore Structures

1998 ◽  
Vol 120 (1) ◽  
pp. 10-19 ◽  
Author(s):  
C. M. Sonsino ◽  
R. Umbach
Keyword(s):  
Fatigue Life ◽  
Crack Initiation ◽  
Large Scale ◽  
Fatigue Behavior ◽  
Cast Steel ◽  
High Strength ◽  
Offshore Structures ◽  
Fine Grained ◽  
Tubular Joints ◽  
Medium Strength

In a joint project of a German working group supported by the ECSC and the Studiengesellschaft fu¨r Stahlanwendung e.V., the fatigue behavior of large-scale hybrid tubular joints with inserts manufactured from the high-strength cast steel GS-12 MnMo 7 4 welded into tubular members formed from the fine-grained steel StE 500 were compared to the behavior of large-scale welded tubular joints. The latter were made from medium-strength fine-grained steel StE 355 and high-strength StE 690. In addition, data from hybrid joints with cast steel inserts of medium-strength GS-8 Mn 7 welded into StE 355 tubulars is available for comparison. The tests were carried out under variable amplitude loading in artificial seawater. The results were evaluated for the failure criteria fatigue life to crack initiation (a = 1 mm) and through crack. With medium-strength (Rp0.2 > 355 N/mm2) hybrid tubulars, where by the use of cast steel inserts the welds were removed into areas of lower stress concentration, fatigue lives higher than a factor of 100 were achieved compared to the welded nodes, even those made from StE 690. However, by the use of high-strength (Rp0.2 > 500 N/mm2) cast steel inserts and tubular members of corresponding strength, the fatigue life to crack initiation was improved by a factor of two despite a thickness reduction compared to the medium-strength design. Post-weld treatments of the welded tubulars without cast steel inserts like shot-peening, TIG-dressing, or their combination resulted only in a slight increase of fatigue life. The results of this investigation do not only show how to improve the fatigue life by a new design using cast steel inserts, but indicate also how to revise design codes from the point of damage calculation (damage sum of 0.50 for welded nodes and 0.25 for cast steel inserts instead of the conventional value of 1.00), as well as consideration of fatigue life to initiation of a technically detectable crack with a defined depth e.g., a = 1 mm.

Exit, Voice, and the Fate of the German Democratic Republic: An Essay in Conceptual History

1993 ◽  
Vol 45 (2) ◽  
pp. 173-202 ◽  
Author(s):  
Albert O. Hirschman
Keyword(s):  
Eastern Europe ◽  
Federal Republic ◽  
German Democratic Republic ◽  
Large Scale ◽  
Democratic Republic ◽  
Communist Regime ◽  
Federal Republic Of Germany ◽  
Special Shape ◽  
Public Protest ◽  
History Of

The revolutionary events of 1989 in Eastern Europe took a special shape in the German Democratic Republic: large-scale flights of citizens to the Federal Republic of Germany combined with increasingly powerful mass demonstrations in the major cities to bring down the communist regime. This conjunction of private emigration and public protest contrasts with the way these distinct responses to discontent had been previously experienced, primarily as alternatives. The forty-year history of the German Democratic Republic thus represents a particularly rich theater of operation for the concepts of “exit” and “voice,” which the author had introduced in his book Exit, Voice, and Loyalty (1970). The events of 1989 are scrutinized in some detail as they trace a more complex pattern of interaction than had been found to prevail in most previous studies.

Study on Mechanical Properties of Ribbed Cast Steel Spherical Joint in Complex Stress State

2011 ◽  
Vol 284-286 ◽  
pp. 1120-1125 ◽  
Author(s):  
Yu Lan Zhang ◽  
Zhi Hua Chen ◽  
Yong Jian Liu ◽  
Xie Jin Wei ◽  
Yi Du Bu
Keyword(s):  
Stress State ◽  
Mechanical Performance ◽  
Design Method ◽  
Cast Steel ◽  
Complex Stress ◽  
Complex Stress State ◽  
Steel Ball ◽  
Technical Standards ◽  
Airport Terminals ◽  
Steel Joints

Cast steel joints have been widely utilized in large-span spatial structures. Based on Ordos airport terminals engineering, the structure and design method of ribbed steel ball nodes is put forward in this essay, in which nonlinear finite element method is applied, bearing capacity and deformation capacity of ribbed steel ball nodes in the complex stress state is made a penetrating analysis to determine mechanical performance of the ribbed steel ball. Among other things, the manufacturing process and technical standards of cast steel ball nodes are elaborated.

scholarly journals B24 Predicting Locations of Defects in the Solidification Process for Large-Scale Cast Steel

2007 ◽  
Vol 2007.60 (0) ◽  
pp. 57-58
Author(s):  
Shuji EGAWA ◽  
Nao-Aki NODA ◽  
Yasunori TASHIRO ◽  
Kouji TAKEOUCHI
Keyword(s):  
Large Scale ◽  
Cast Steel ◽  
Solidification Process

Prototype Stress Test Research on Cast-Steel Joint of Large Span Roof System

2012 ◽  
Vol 562-564 ◽  
pp. 890-894
Author(s):  
Zheng Dao Zhang ◽  
Wen Ping Fei ◽  
Jian Mei Zhang
Keyword(s):  
Large Scale ◽  
Stress Test ◽  
Cast Steel ◽  
Load Condition ◽  
Frame Structure ◽  
Roof System ◽  
Large Span ◽  
Steel Joint ◽  
Loading System ◽  
Cast Steel Joint

For the cast-steel joint of large span roof system, the main difficulties of prototype stress test encountered are the large scale of the structure system, large loading system and large supporting system, etc. The hydraulic jack of high tonnage is adopted to apply the load. The frame structure of channel steel is used to fix the cast-steel joint and the loading system. The reverse loading system is elaborated to simulate the axial tensile force. So prototype stress test on the cast-steel joint of large span roof system is accomplished successfully. The test results show that, under the designing load condition, cast-steel joint is in a linear elastic state, the structure is globally safe; the maximum surface stress of cast-steel joint is adjacent to the crossing point of steel pipes; the stress value of test is well coincident with one of finite element analysis. This test device system is especially suitable for the stress state test of large components, and can also provide important reference to the similar projects.

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