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Research on Ultimate Strength of Steel Tube-gusset K-joint under Compression

Author: YaoJianGang
Tutor: YangHaiXu
School: Northeast Forestry University
Course: Structural Engineering
Keywords: K-type steel tube plate node Node test Finite Element Analysis Ultimate compressive capacity Equivalent slenderness ratio
CLC: TU392.3
Type: Master's thesis
Year: 2011
Downloads: 14
Quote: 0
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Abstract


In recent years, the steel structure system has been developing rapidly . Steel plate node is often used in steel structure system (? ) Node form . Failure modes of the tube sheet joint strength are mainly in charge of the board on both sides intersect at the corner of , board failure mode is less. In order to thoroughly understand the tube plate node node board force performance , failure modes and their pressure on the ultimate bearing capacity , a typical node in a large diameter well drilling derrick based , simplified plane K the type steel plate node of the object of study , completed the following work : First, the design of the node specimens , material test nodes and node test and numerical simulation related parameters . Nodes under load stress distribution and the law of development : the nodes of the plastic zone first appeared in the two corners of the compression branch pipe ends , followed by development pressure branch pipes on both sides and the ends of the node test , research , The formation of three plastic zone , the final destruction in the node before the three plastic zone is connected as one . Node failure pattern is now trilinear failure modes . Using ANSYS finished the plane K steel plate node finite element simulation analysis , simulation results and experimental results in a certain difference in the ultimate bearing capacity value , but stress the development of basic variation is consistent . Make a calculation of the formula of ultimate bearing capacity ultimate bearing capacity of the node based on the current pressure on existing node board found gusset plate damage are instability and failure , but the calculation results with the experimental results are quite different calculated values ??are experimental values 63 %, 68% , 51% . Based axial compression elastic rectangular plate buckling theory , the use of design of steel structures (GB50017-2003) in the calculation model , put forward the concept of equivalent slenderness ratio and equivalent slenderness ratio check take stability coefficient to calculate the ultimate compressive capacity of the gusset plate , calculated with the experimental results close to 88% of the test values ??.

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CLC: > Industrial Technology > Building Science > Building structure > Metal structures > Various types of steel > Steel structure
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