Steel pipe integral girders for constructing prestressing force and construction method thereof

Abstract

The invention relates to a pre-stressing whole steel pipe truss; components of the truss include bars and nodes; the bars include chords and webs of upper and lower chords; the invention is characterized in that the pulled bars of the truss and the connected nodes are at least provided with a beam of pre-stress strand; both ends of the pre-stress strand are respectively fixed on both ends of pulled sections formed from the pulled bars of the truss and the connected nodes; concrete is casted in the pulled bars of the truss and the connected nodes. The whole truss is a truss system combined with a plurality of materials, such as steel, concrete, pre-stress strand, which improves the bearing capacity and rigidity of the truss, and provides the secondary defensive line for the truss system only by little economic investment. The invention also discloses the construction method of the pre-stressing whole steel pipe truss.

Description

Technical field [0001] The invention relates to a building truss and a construction method thereof, in particular to a prestressed steel pipe integral truss and a construction method thereof. Background technique [0002] In modern buildings, steel trusses composed of steel pipes have been widely used in long-span and large cantilever structures and transfer beam structures because of their large bearing capacity, flexible layout, and convenient construction. At present, the member joints of planar trusses are divided into two types: hinged joints and rigid joints. When hinged joints are used, the planar truss is a statically determinate structure, that is, a geometrically invariant system without redundant constraints, and there is only one line of defense. As long as one member is damaged, the structure collapses instantly, and the consequences are disastrous; when rigid joints are used, although The truss is still a statically indeterminate structure, that is, a geometri...

AI Technical Summary

Problems solved by technology

[0005] (1). When using hinged joints, it is a statically indeterminate structure without safety reserves;

[0006] (2). When using just-connected nodes, it needs to be exchanged for a small security reserve at the cost of a huge economic investment;

[0007] (3). Some rods bear a lot of force, and some rods are almost zero rods, resulting in large cross-sections and many materials used for local rods;

[0008] (4). The rigid connection of nodes is difficult to realize, and the deformation of the overall truss is often increased due to the deformation of nodes

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