Steel structure virtual pre-assembly method

Abstract

The invention discloses a steel structure virtual pre-assembly method, which is used for virtual pre-assembly between steel structure parts connected by bolt holes. At least one group of connecting holes is formed in a joint of each steel structure part; digital close-range photogrammetry systems are arranged on four corner points of each group of the connecting holes; two adjacent steel structureparts are connected through the connecting hole groups; central coordinates of the bolt holes on the four corner points of each connecting hole group of the steel structure parts are obtained by utilizing the digital close-range photogrammetry systems before the virtual pre-assembly; the two adjacent steel structure parts are assembled by utilizing the central coordinates of the bolt holes in thevirtual pre-assembly process; deviation values of the central coordinates of the bolt holes in the two adjacent steel structure parts are compared and analyzed; and the positions of the connecting hole groups in the steel structure parts are corrected through the deviation values. The virtual pre-assembly method is simple; and compared with an entity pre-assembly method, the virtual pre-assemblymethod can greatly reduce the cost and shorten the construction period, especially for large complex projects and projects in poor construction conditions.

Description

technical field [0001] The invention relates to a virtual pre-assembly method of a steel structure, which belongs to the technical field of bridge construction, and in particular to a construction method of a steel structure pre-assembly. Background technique [0002] Steel structures are generally composed of finished components (including enlarged components) in the factory, transported to the construction site for installation. In order to ensure that the components can be accurately installed in place after they are transported to the site, it is generally necessary to carry out physical pre-assembly in the factory to test the assembleability of the structure. The pre-assembly of factory entities is to manufacture and supply steel components such as large-scale columns, beams, trusses, supports, and multi-layer steel frame structures in sections, especially large steel structures connected by high-strength bolts. The shell structure, etc., are temporarily assembled as a...

AI Technical Summary

Problems solved by technology

However, the existing problem is that in the process of virtual assembly, only the error between the theoretical coordinates and the actual coordinates of a single steel structure is considered, and the relative error of the hole position when the steel structure is connected is ignored. Therefore, this method uses When guiding the actual installation, there will still be defects of insufficient installation accuracy

However, it does not disclose a method that can ensure high-precision assembly of two adjacent steel structural parts (that is, the position of the connecting hole group of two adjacent steel structural parts cannot be controlled)

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