Abstract:Based on the site conditions of the case, the safety performances of cantilever scaffold not fully standardized are designed, checked and calculated. Two models of structure simplification and refining are established by using the numerical analysis method. Firstly, the Midas Civil is used to calculate the stress condition at the connecting point of cantilever structure simplification model, and then, the refining model of welding line and bolt established by the plane element is used to check and calculate the safe bearing capacity of the cantilever detail structure. Finally, XTRACT is used to analyze the section of structural beam column, and the bearing capacity of the built structure is checked and calculated. Considering the wind loads, the proposed scheme meets the requirements of mechanical bearing capacity. The bearing capacity of each rod system and section steel is only about 30%. The performances of the other local materials cannot be fully used, except for the bolts, ear plates and welding lines, the utilization rate reaches about 70%. The cantilever frame has little influence on the overall bearing capacity of the structure. It is proposed that the local damage of press ring and bolt joints should be considered during construction. The anchoring material strength and anchoring depth are properly increased. During the design of cantilever frames if increasing the connecting material strength of frame member bars, the layout spacing of steel pipe can be properly increased to improve the turnover rate of steel pipe and reduce the construction cost.
