PBL stiffening rectangular steel tube concrete space truss

Abstract

The invention discloses a PBL stiffening rectangular steel tube concrete space truss. The concrete space truss comprises a top bracing and a bottom bracing arranged just below the top bracing, wherein the top bracing and the bottom bracing are distributed in parallel; the top bracing comprises a plurality of top chords and a plurality of upper connection rods connected with each two adjacent top chords; the bottom bracing comprises a plurality of bottom chords and a plurality of lower connection rods connected with each two adjacent bottom chords; the plurality of top chords and the plurality of bottom chords are distributed in a staggered manner; each bottom chord is fixedly connected with two top chords at the left side and the right side above through a plurality of web members; the plurality of top chords and the plurality of bottom chords are PBL stiffening chords; each PBL stiffening chord comprises a square steel tube I, four PBL stiffening plates and an inner-pipe concrete structure. The concrete space truss is simple in structure, convenient to process, fabricate and construct and excellent in structural mechanical property, and has a good using effect, and a plurality of problems of an existing truss structure can be effectively solved.

Description

technical field [0001] The invention relates to a steel pipe space truss, in particular to a PBL stiffened rectangular steel pipe concrete space truss. Background technique [0002] At present, in order to facilitate the connection and solve the problem of the local stability of the chord steel plates at the joints where the webs and chords are directly welded, the steel pipe space trusses generally use steel pipes with circular cross-sections. However, when the upper chord and the lower chord of the space truss are both made of steel pipes with circular cross-sections, there are problems of difficult and unreliable connection between the upper chord and the concrete panel, and difficult and unreliable connection between the lower chord and the lower structure or support. At the same time, since thick steel plates are difficult to process into small-diameter steel pipes, the input and processing costs are relatively low, and time-consuming and labor-intensive. Relatively sp...

AI Technical Summary

Problems solved by technology

However, when both the upper chord and the lower chord of the space truss are made of circular cross-section steel pipes, it is difficult and unreliable to connect the upper chord to the concrete panel and the lower chord to the lower structure or support.

At the same time, because it is difficult to process thick steel plates into small-diameter steel pipes, the input processing cost is low, and it is time-consuming and labor-intensive

Images