An installation method of a space hyperboloid funnel-shaped single-layer reticulated shell structure

Abstract

The invention provides an installation method for a space hyperboloid funnel-shaped single-layer reticulated shell structure, including welding partition division, selecting characteristic positioning points, determining the welding sequence, determining the spatial geometric coordinates, processing components, installing the cylindrical area and the funnel cone area Reticulated shell and support unloading and other steps. The invention divides the reticulated shell into a cylindrical area and a funnel-conical area, divides the welding layer and welding area according to their respective characteristics, makes the welding partition more reasonable, effectively reduces welding deformation, and performs finite element simulation and checking calculation in the whole process. According to the analysis Results Reverse deformation measures were taken in advance to improve the forming accuracy of reticulated shells. Key control nodes were selected as feature positioning points in each welding area, and precise positioning and fixing measures were taken in advance for feature positioning points to effectively control the spatial coordinates of the entire reticulated shell. Expansion nodes are reserved at the interface of the welding area to play the role of stress isolation. By controlling the allowable difference of the node coordinates of the reticulated shell, the requirements of different accuracy can be met.

Description

technical field [0001] The invention belongs to the field of civil construction, and in particular relates to an installation method of a space hyperboloid funnel-shaped single-layer reticulated shell structure. Background technique [0002] At present, the space reticulated shell structure has been unprecedentedly applied and developed at home and abroad, among which the space hyperboloid funnel-shaped single-layer reticulated shell structure is due to its beautiful shape, reasonable force, high stability, material saving, and applicable to large spans, etc. Advantages, it is often used in building structures and has a wide range of application spaces. [0003] However, this type of structure has high requirements on the control of the size of the rods and the spatial positioning accuracy of the rod nodes, and the small deviation of the geometric dimensions of the rods and nodes and the change of the curved surface often have a negative impact on the internal force and over...

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Problems solved by technology

[0003]However, this type of structure has higher requirements on the control of the size of the bar and the spatial positioning accuracy of the bar nodes, and the deviation of the geometric dimensions of the bars and nodes and the surface The change of the reticulated shell will often have a great impact on the internal force and overall stability of the reticulated shell structure, and directly affect the internal force distribution of the reticulated shell and the construction of the subsequent process.

[0004] In practice, the wall thickness of this type of structural members is relatively thin, and there are many intersecting node members, often due to improper control of the welding process, resulting in large deviations in the spatial positioning of the member nodes; at the same time, this type of structure is generally set up inside the building structure. Moreover, it is attached to the main structure, the surrounding working space is limited, and the conditions such as cross-operation during the construction process often do not meet the construction conditions for pre-factory modular assembly and then assembly into shape, which brings a lot of challenges to the on-site construction of this type of structure. challenge

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