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FRP-UHPC combined bridge deck slab with open stiffening ribs

A technology of FRP-UHPC and stiffeners, applied in bridges, bridge materials, bridge construction, etc., can solve the problems of low material utilization rate, low bridge deck stiffness, low elastic modulus, etc., and achieve high material utilization rate and construction production Convenience, light weight effect

Inactive Publication Date: 2021-01-22
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, FRP also has the disadvantages of low elastic modulus and high cost. The full FRP bridge deck has low stiffness and low material utilization rate, so it is difficult to obtain general promotion.

Method used

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  • FRP-UHPC combined bridge deck slab with open stiffening ribs
  • FRP-UHPC combined bridge deck slab with open stiffening ribs
  • FRP-UHPC combined bridge deck slab with open stiffening ribs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment discloses an FRP-UHPC composite bridge deck with open stiffeners. The deck is a unidirectional plate with a width greater than or equal to 600 mm, so as to avoid an increase in processing and installation workload caused by laying too many plates along the entire length of the bridge. An FRP-UHPC composite bridge deck with open stiffeners, including FRP profile and UHPC layer 3.

[0032] The FRP profile is integrally pultruded, see 1 or 2, the FRP profile includes an FRP opening stiffener 1, an FRP perforated plate 2 and an FRP horizontal plate 4, and the FRP horizontal plate 4 is a rectangular plate arranged horizontally.

[0033] Referring to 1 or 2, the upper surface of the FRP horizontal plate 4 is connected with several FRP perforated plates 2, and several FRP perforated plates 2 are arranged at equal intervals along the width direction of the FRP horizontal plate 4, and the length direction of the FRP perforated plates 2 is in line with the The len...

Embodiment 2

[0041] This embodiment discloses an FRP-UHPC composite bridge deck with open stiffeners. The deck is a unidirectional plate and includes FRP profiles and a UHPC layer 3 .

[0042] Referring to 1 or 2, the FRP profile includes an FRP open stiffener 1, an FRP perforated plate 2 and an FRP horizontal plate 4, the FRP horizontal plate 4 is a rectangular plate arranged horizontally.

[0043] Referring to 1 or 2, the upper surface of the FRP horizontal plate 4 is connected with several FRP perforated plates 2, and several FRP perforated plates 2 are arranged at equal intervals along the width direction of the FRP horizontal plate 4, and the length direction of the FRP perforated plates 2 is in line with the The length direction of the FRP horizontal plate 4 is consistent, and the two ends of the FRP perforated plate 2 in the length direction are respectively flush with the edges on both sides of the FRP horizontal plate 4 in the length direction.

[0044] see figure 1 , the FRP per...

Embodiment 3

[0048] The main structure of this embodiment is the same as that of Embodiment 2, furthermore, the distance between two adjacent FRP open stiffeners 1 is less than or equal to 0.2m.

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Abstract

The invention discloses an FRP-UHPC combined bridge deck slab with opening stiffening ribs. The FRP-UHPC combined bridge deck slab can be used as a bridge deck slab for driving and a pedestrian overpass bridge deck slab. The FRP-UHPC combined bridge deck slab with open stiffening ribs comprises an FRP sectional material and a UHPC layer, the FRP sectional material comprises FRP opening stiffeningribs, FRP perforated plates and an FRP transverse plate, the upper surface of the FRP transverse plate is connected with the multiple FRP perforated plates, the lower surface of the FRP transverse plate is connected with the multiple FRP opening stiffening ribs, UHPC is poured on the upper surface of the FRP transverse plate to form the UHPC layer, and the multiple FRP perforated plates and multiple through ribs are located in the UHPC layer. The problems of cracking, corrosion, fatigue and the like of a traditional material are solved; and meanwhile, the bridge deck slab is simple in structure, convenient to construct and manufacture and clear in stress, and has popularization potential.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to an FRP-UHPC composite bridge deck with open stiffeners. Background technique [0002] Most existing bridges use concrete decks or orthotropic steel decks. Among them, the concrete bridge deck with high rigidity and low cost has the disadvantages of easy cracking, heavy weight and long construction period on site, while the orthotropic steel bridge deck with light weight and short construction period has problems such as fatigue cracking and corrosion. Fiber-reinforced composite material (hereinafter referred to as FRP) is a high-strength, light-weight material with good corrosion resistance and fatigue resistance. The bridge deck made of it can effectively avoid the problems of the above two bridge decks. [0003] However, FRP also has the disadvantages of low elastic modulus and high cost. The full FRP bridge deck has low stiffness and low material utilization rate, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/12E01D101/26
CPCE01D19/125E01D2101/26
Inventor 狄谨肖博文
Owner CHONGQING UNIV
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