The Bionic Optimization and Analysis and Calculation of the Cast-Steel Joint with Three Branches

2014 ◽  
Vol 548-549 ◽  
pp. 1618-1622
Author(s):  
Zheng Hao Zhu ◽  
Wen Feng Du ◽  
Zhi Fei Sun ◽  
Li Ming Zhu
Keyword(s):  
Failure Modes ◽  
Cast Steel ◽  
Local Buckling ◽  
Bending Moment ◽  
Axial Direction ◽  
Calculation Methods ◽  
Steel Joint ◽  
Architectural Structures ◽  
Steel Joints ◽  
Cast Steel Joint

The tree-like structure is a branch of space bionic structures,belonging to the Bionic Architectural Structures. Cast-steel joints with branches are the keys to build the tree-like structures.They are used widely,and the most common joints in our projects are cast-steel joints with two、three and four branches. The cast-steel joints with two branches are planar,while the joints with three and four branches are spatial.Until now,the basic theoretical researches about the cast-steel joints with branches are also relatively scarce.This paper did researches about mechanical properties, calculation methods and structural optimization of the cast-steel joints with three branches deeply and systematically. The result shows that the bending moment has a big influence on the value of the max stress. And the three main failure modes of the cast-steel joint with three branches are yield of the main tubular along the axial direction, local buckling at the connection of the main tubular and branches, and the tearing out of the branches.

Preliminary Parametric Assessment of a Bolted Endplate Joint under Combined Axial Force and Cyclic Bending Moment

2011 ◽  
Vol 255-260 ◽  
pp. 718-721
Author(s):  
Z.Y. Wang ◽  
Q.Y. Wang
Keyword(s):  
Finite Element Analysis ◽  
Axial Force ◽  
Seismic Design ◽  
Axial Load ◽  
Failure Modes ◽  
Bending Moment ◽  
Element Analysis ◽  
Cyclic Behaviour ◽  
Joint Behaviour ◽  
Steel Joints

Problems regarding the combined axial force and bending moment for the behaviour of semi-rigid steel joints under service loading have been recognized in recent studies. As an extended research on the cyclic behaviour of a bolted endplate joint, this study is performed relating to the contribution of column axial force on the cyclic behaviour of the joint. Using finite element analysis, the deteriorations of the joint performance have been evaluated. The preliminary parametric study of the joint is conducted with the consideration of flexibility of the column flange. The column axial force was observed to significantly influence the joint behaviour when the bending of the column flange dominates the failure modes. The reductions of moment resistance predicted by numerical analysis have been compared with codified suggestions. Comments have been made for further consideration of the influence of column axial load in seismic design of bolted endplate joints.

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.

Strength and Deformation Capacity of Corroded Pipes: The Joint Industry Project

2013 ◽  
Author(s):  
Erik Levold ◽  
Andrea Restelli ◽  
Lorenzo Marchionni ◽  
Caterina Molinari ◽  
Luigino Vitali
Keyword(s):  
Failure Modes ◽  
State Of The Art ◽  
Local Buckling ◽  
Bending Moment ◽  
External Pressure ◽  
Fe Model ◽  
Deformation Capacity ◽  
Offshore Pipelines ◽  
Strength And Deformation ◽  
Bending Loading

Considering the future development for offshore pipelines, moving towards difficult operating condition and deep/ultra-deep water applications, there is the need to understand the failure mechanisms and better quantify the strength and deformation capacity of corroded pipelines considering the relevant failure modes (collapse, local buckling under internal and external pressure, fracture / plastic collapse etc.). A Joint Industry Project sponsored by ENI E&P and Statoil has been launched with the objective to quantify and assess the strength and deformation capacity of corroded pipes in presence of internal overpressure and axial/bending loading. In this paper: • The State-of-the-Art on strength and deformation capacity of corroded pipes is presented; • The full-scale laboratory tests on corroded pipes under bending moment dominated load conditions, performed at C-FER facilities, are shown together with the calibrated ABAQUS FE Model; • The results of the ABAQUS FEM parametric study are presented.

Properties of a creep resistant 9Cr-1.5Mo-1Co cast steel joint welded with a matching flux-cored wire

2014 ◽  
Vol 58 (4) ◽  
pp. 565-575 ◽  
Author(s):  
S. Baumgartner ◽  
A. Holy ◽  
M. Schuler ◽  
A. Saric ◽  
R. Schnitzer ◽  
...  
Keyword(s):  
Cast Steel ◽  
Cored Wire ◽  
Steel Joint ◽  
Cast Steel Joint

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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