Whole Stability Analysis Of The Beam On The Construction Process Of The Long-span Steel Framework Structure

The bean members regarding the long-span steel framework structure, because of the long span which the slenderness ratio of the outside plane is quite big, usually presents the phenomenon of the bending and torsion instability under the load function, as the control interface of width-thickness ratio can keep certain value, that the local buckling does not precede the overall instability circumstances. When the components of the overall instability is taking on, at the same time, the security incidents easily appears, and the component stress is far less than the yield strength of the limits of component materials, the material does not give full play to the strength of the reserves. In order to protect the safety and full use of construction materials, components must be of such a study to explore the overall failure.I consider all kinds of the factors, from the large-span steel frame construction view of decomposition throughout the construction process,the analysis of its mechanical characteristics to simulate the majority of the establishment of long-span steel frame construction process of the calculation diagram of the beam, using the theory of finite element simulation, in this based on the analysis of the impact of beam elements of the overall buckling load factors critical to explore the beam slenderness ratio of the overall instability of the affected components, to explore the form of support form the overall instability of the beam component of the impact of critical load.In order to confirm above parsing process, depends on the structural style for the great span steel framework construction-some company office building entire construction process, has carried on the work site scene test by constructing stages, including takes place the stage, the adjustment (concrete pan) the stage, fixedly (artificial pile to carry) the stage dynamic data test in advance, the contrast test result with the standard result, to confirm the finite element theory result which carries on the analysis.Through the above contrast and analysis,I can summarizes the result had proven simultaneously the beam of long-span steel framework construction, not does not become increases (reduction) the relations between the overall instability with slenderness ratio of the plane outside. this has confirmed the standard explaining the construction process are indeed bearing the impact of changes in the form of large-span structure with the loss stability of the overall beam; verify the normative framework for large-span structural steel beam design component is biased safe; supporting the plate on the long-span steel frame structure located in the cross-beam components bound by a favorable effect; to improve the entity works out an inter-edge reinforcement and strengthening proposals.