A latticed honeycomb beam segment and a large-span latticed steel beam and its fabrication and installation method

Abstract

The invention provides a lattice type honeycomb beam segment, a large-span lattice type steel beam and a manufacturing and installation method thereof. The lattice type honeycomb beam segment comprises a lattice type honeycomb beam body. The lattice type honeycomb beam body is formed by welding a plurality of I-shaped segment units of the same structure. Each I-shaped segment unit comprises an upper chord member and a lower chord member which are welded to the upper end and the lower end of a vertical web member. The two ends of each upper chord member and the corresponding vertical web member are welded through angle oblique web members, and the two ends of each lower chord member and the corresponding vertical web member are welded through angle oblique web members. The ends of the upper chord members of the adjacent I-shaped segment units are sequentially welded to form a broken-line-shaped or curve-shaped upper chord, and the ends of the lower chord members of the adjacent I-shaped segment units are sequentially welded to form a horizontal lower chord. After welding, the angle oblique web members and the vertical web members of the adjacent I-shaped segment units form a hexagon. According to the lattice type honeycomb beam segment, the large-span lattice type steel beam and the manufacturing and installation method thereof, reasonable design and construction organization are adopted, the height limit of a honeycomb beam manufactured by hot rolled section steel of a general specification can be overcome, and the comprehensive cost is more competitive in the market compared with that of a flat plate grid structure.

Description

technical field [0001] The invention belongs to the technical field of large-span industrial and civil building construction, and in particular relates to a lattice-type honeycomb beam segment and a long-span lattice-type steel beam for load-bearing large-span light-duty roofs and a manufacturing and installing method thereof. Background technique [0002] Theaters, gymnasiums, exhibition halls, great halls, airport waiting halls and other large public buildings in civil buildings, long-span workshops, aircraft assembly workshops and large warehouses in industrial buildings, etc., have some types of buildings with a horizontal span of more than 30 meters. long-span structure. Commonly used long-span roof structures mainly include planar trusses, space trusses, flat grids, space reticulated shells, and cable-membrane structures. Among them, the planar truss structure has clear force, simple design, and easy construction. It is usually suitable for roof structures with a span...

AI Technical Summary

Problems solved by technology

However, for long-span and ultra-long-span structures, compared with structures such as space trusses, flat grids, and space shells, it is difficult for the traditional honeycomb beam structure to reflect the advantages of economy and applicability

Analyzing the reasons, there are mainly the following three points: (1) For long-span simply supported members, the bending moment of the cross section decreases in a parabolic manner from the mid-span to the support, and this type of I-shape with solid web is adopted in the entire span range. It is not economical to cut and weld the honeycomb beams with equal height sections, and it also increases the adverse effects of wind load on buildings; (2) For long-span simply supported members, the traditional honeycomb beams have limited applicability, and the With the increase of the spanning space, the height of the girder required in the mid-span is also increasing. The hot-rolled section steel of ordinary specifications often cannot meet the requirements, and the steel plate welding is required to manufacture and process. The cost is high, and there are problems such as local stability; (3 ) For long-span structures, the shear deformation of honeycomb beams has a significant effect on the deflection of members. The deflection of honeycomb beams of the same specification is significantly larger than that of ordinary solid-web members, and the shear force near the support of long-span structures is larger The use of honeycomb webs in certain areas is unfavorable for controlling the overall deformation of the structure

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