Numerical Simulation Study About The Load Capacity And Multi-factor Effects Of The Outer-Shell Node

The steel production of China have accounted for45.5%of the steel production of the world, and steel-structure buildings industry has entered a new stage of rapid development. However, the steel structure is still poorly studied to solve some technical problems,However, there are still some technical problems which are needed to solve,for example,many steel-structure buildings have collapsed in the earthquake due to the destruction of the beam-column joints, so it is necessary to look for a kind of beam column joints which is high strength, good stability, little weld, and easy to operate construction site steel-structure.Although previous studies have shows that the outer-shell node is the new type of node that we are looking for. It has overturned the anti-shearing form which the shear relies on the web transfer traditionally, and the shear transfer mechanism is still not clear.In order to promote the engineering application of the outer-shell node in Yunnan Province and improve the design of the node engineering applications, further research about the out-shell node performance is studied in this thesis.Firstly, it is concluded that the consisitent accordant resilence curves and deformation numerial simulation results of the loading point from the column at2M beam between uniaxial testing and low cyclic cycle testings. This proves that the numerical model can be used.In addition, ABAQUS simulation uses the practical engineering and test full size of joints as model and analyses the impact of the node performance by low cycle loading in four conditions:T-rib stiffener no webs, no T-rib stiffener no webs, T-rib stiffener and web and no T-rib stiffener but have webs. It is determined that whether node meet our requirements by using the indicators which represent the node performance, such as hystersis curves, strength stiffness degradation and energy dissipation. Finally, ABAQUS finite element software is used to do the multi-facotr affected analysis of the node, including analysis and comparision of the stress and strain of the plug welding in the outer-shell between the side of no beam and the side of the beam, giving an optimum proposal of the plug weld form, and drawing a better conclusion of the hand-hole radius of the range according to the columu deformation maps, stress diagrams, node skeleton curves and the column wall buckling dispalcement mapsin of different hand-holes radiuses.