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The Experiment and Analysis of Ultimate Buckling Strength in Composite Tube Truss

Author: TaoTao
Tutor: HeRuoQuan
School: Suzhou Institute of Technology
Course: Structural Engineering
Keywords: Combination pipe truss Model test Nonlinear Finite Element Analysis Ultimate flexural capacity of
CLC: TU398.9
Type: Master's thesis
Year: 2009
Downloads: 35
Quote: 0
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Abstract


Combination truss composite beams with ordinary web type, structure light weight, stiffness, low cost, compared with pure steel truss structure ductility and stable performance, high load carrying capacity. This structure has been widely used in roads, bridges, high-rise, high-rise housing construction floor structure, showing broad prospects for development. The the combination pipe truss is a combination truss in the form its upper and lower chord, web members are used to the closed sections of steel pipe, tube stud truss and concrete flange plate to establish a reliable connection. With the development and application of the technology of the intersecting line of CNC cutting, fabrication and construction of the pipe truss very convenient combination of tube truss flexural bearing performance engineering value. Firstly, a scaled model of a combination of two different thickness tube truss vertical monotonic loading test specimen to observe a combination of tube truss deformation force stage performance, the failure modes of the member state as well as the structure of the force; through test measured data, the the specimen load - deflection curve and the deflection distribution curve, and analysis of the combination of tube truss concrete slab surface, the strain and stress distribution along the section of pipe truss, and control of the entire combination of tube truss cross section, as a limited element model basis. Then this article using finite element analysis software ANSYS nonlinear finite element simulation of the whole process a test beam loading simulation calculation results with the experimental results are in good agreement, to verify the reasonableness of this paper the finite element model selection can provide the basis for in-depth analysis, according to the actual situation; subsequent article first designed a span of 15m combination of tube truss and flexural capacity of finite element analysis, a detailed analysis of the load - deformation curve, the failure mechanism and the destruction of the specimen the distribution of the various components of the stress analysis using the finite element software; Based on this, the thickness of the concrete slab, concrete strength, steel strength, high-span ratio, the area ratio of the upper and lower chords and other factors on the impact of the combination of pipe truss flexural capacity of and make a qualitative analysis; then this article in accordance with the current design of steel structures in combination beam flexural ultimate bearing capacity formula derivation formula plastic flexural capacity of the combined pipe truss, and by example and finite element calculation results results in good agreement, to verify its correctness. Summarizes the main conclusions of the full text and needs further experimental study and theoretical analysis.

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CLC: > Industrial Technology > Building Science > Building structure > Composite structure > Other composite structures
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