A three-story cantilevered steel structure that can be built quickly and saves land and its construction method

Abstract

The invention relates to the technical field of structures covering a large area of ​​space, and discloses a three-layer cantilevered steel structure that can be built quickly and saves land and a construction method thereof. Cantilevered spanning trusses; ceiling slabs laid on the upper chords of spanning trusses, bottom slabs laying on the lower chords of spanning trusses, hanging floors suspended under spanning trusses, and lower ends connected to spanning floors The stay cable on the truss and the upper end obliquely connected to the vertical installation foundation; the stay cables are combined into stay cable pairs, and the suspenders and the stay cable pairs are set in one-to-one correspondence, and are connected with the corresponding stay cable pairs on the lower chord The same position; the two cables in the cable pair are symmetrically connected on both sides of the node lower chord, and the vertical projection of the cable falls outside the vertical projection of the connected node lower chord. The present invention significantly expands the usable building area without requiring additional land occupation.

Description

technical field [0001] The invention relates to the technical field of structures covering a large area of ​​space, in particular to a three-layer cantilevered steel structure that can be built quickly and saves land and a construction method thereof. Background technique [0002] Buildings such as exhibition halls have high requirements for area, and also require that they can be built quickly when there is demand for exhibitions, and may be expanded at any time due to changes in exhibition needs. The truss structure building can meet the requirements of large span and fast construction at the same time, so the truss structure building is widely used in exhibition halls. [0003] The main reason for the fast construction of a truss structure is that its roof and supporting structure are prefabricated and can be built at one time. However, if a multi-layer structure is involved, it still needs to be built layer by layer, compared to ordinary buildings. In terms of duration,...

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Problems solved by technology

And if it is necessary to build each floor of a multi-storey truss building at the same time, its stress situation will become more complicated.

[0006] Taking a cross-floor truss with upward-pull cables and downward-pull suspenders as an example, the applicant found through force analysis that in such a truss, it is not appropriate to simultaneously bear a load perpendicular to the direction of the truss between the upper chord and the lower chord of the truss. The force of external pull, such a force is easy to break the truss into two pieces like bamboo; the same chord of the truss cannot bear too much shear, otherwise it will break; the various rods that make up the truss cannot be connected with the cables. There is cross contact between components such as / dangling column, otherwise it will not only affect the transmission of force in the cable / daviting column (the impact is especially serious when using prestressed cable), but also cause damage due to different materials (electrochemical corrosion) and easy dust accumulation. Severe rust at cross-contact locations

[0007] Because there are many problems to be solved, such as the suspension cable structure is not suitable for hanging loads, and the cables are not suitable for crossing with other chords (CN104775524B, CN101265727B and other documents point out various stress problems of trusses in this scenario) , the design of such a cantilevered steel structure with hangers and cables is particularly difficult

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