Cold-formed thin-walled steel web combined PC box girder
A technology of cold-formed thin-walled steel and cold-formed steel, which is applied to bridges, bridge parts, bridge materials, etc., can solve the problems of easy cracking of the web, complex construction, and self-heavyness, etc., to achieve a slim structure and improve the bending resistance of the section ability and torsion resistance, the effect of light weight
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example 1
[0026] Such as figure 1 As shown, this example provides a cold-formed thin-walled steel web composite PC box girder for the main girder of bridge structure, including upper flange (1), truss-type cold-formed steel composite lower flange (2), truss Type cold-formed steel composite web (3), angle steel connectors (4), self-tapping self-drilling screws and other connectors (5) and C-type cold-formed thin-walled steel connectors (6).
[0027] Such as Figure 2-3 As shown, the upper flange (1) is composed of a prefabricated concrete composite panel (1a) and a cast-in-place concrete section (1b), and the precast concrete composite panel (1a) is a UHPC-reinforced concrete panel with a thickness of 300mm. The cast-in-place concrete section (1b) is UHPC material. The prefabricated concrete composite slab (1a) is provided with a circular post-casting hole (1c) penetrating through the thickness of the slab. The post-cast hole (1c) is also filled with UHPC during the construction of th...
example 2
[0033] This example provides a cold-formed thin-walled steel web composite PC box girder used for primary and secondary beams of building structures.
[0034] The upper flange (1) is composed of a precast concrete composite slab (1a) and a cast-in-place concrete section (1b), and the precast concrete composite slab (1a) is a recycled concrete-reinforced concrete slab with a thickness of 70 mm. The cast-in-place concrete section (1b) is recycled concrete material. The prefabricated concrete composite slab (1a) is provided with a square post-casting hole (1c) penetrating through the thickness of the slab. The post-cast hole (1c) is filled with recycled concrete during the construction of the cast-in-place concrete section (1b). The two longitudinal sides of the prefabricated concrete composite slab (1c) are provided with installation holes (1d) with a spacing of 100mm, and are connected with the truss-type cold-formed steel web (3) and the angle steel connector (4) through cros...
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