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CFRP-UHPC double-limb thin-wall high pier stud

A high-pier, thin-walled technology, used in bridge parts, bridge materials, bridges, etc., can solve problems such as fatigue damage and cracks in concrete, and achieve the effects of enhancing integrity, saving materials, and good seismic performance.

Pending Publication Date: 2021-04-06
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thin-walled piers with double limbs of this reinforced concrete structure are prone to cracks and fatigue damage when the top of the pier continuously generates large displacements.

Method used

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  • CFRP-UHPC double-limb thin-wall high pier stud
  • CFRP-UHPC double-limb thin-wall high pier stud
  • CFRP-UHPC double-limb thin-wall high pier stud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A CFRP-UHPC double limb thin-walled high pier column, such as figure 1 As mentioned above, it includes two thin-walled columns 1 parallel to each other, and the two thin-walled columns 1 are connected by tie beams 2 . The thin-walled column 1 is a rectangular column with a bottom surface, so the thin-walled column 1 includes two opposite long sides and two opposite short sides. The tie beam 2 can be at any angle with the thin-walled column 1 . In this embodiment, the tie beam 2 is perpendicular to the thin-walled column 1 , and the tie beam 2 is perpendicular to the length direction of the thin-walled column 1 . The number of tie beams 2 can be set to any number. In this embodiment, only one tie beam 2 is provided, and the ends of the tie beams 2 are connected to the central part of the thin-walled column 1 in the length direction.

[0031] Wherein, the thin-walled column 1 includes a body 11 and a CFRP layer 12 covering the outer surface of the body 11 . The tie beam...

Embodiment 2

[0037] This embodiment is basically the same as Embodiment 1, the difference is: in this embodiment, as Figure 4 and Figure 5 As shown, the thin-walled column 1 includes a hollow body 11 inside. The body 11 is completely cast from UHPC. The inner wall of the body 11 is provided with a steel pipe 113 , and the outer wall is covered with a CFRP layer 12 .

[0038] The main body 11 is a cylinder with a rectangular bottom, so the thin-walled column 1 includes two opposite long sides and two opposite short sides, and a reinforcing part 13 parallel to the short sides is provided between the two long sides of a main body 11 , the reinforcing part 13 is also completely cast from UHPC, and is formed simultaneously with the main body 11 in the mold. The reinforcement part 13 divides the inner cavity of the body 11 into several cavities, and each cavity is provided with a steel pipe 113 matching the size of the cavity. The number of reinforcing parts 13 can be set arbitrarily. In thi...

Embodiment 3

[0040] This embodiment is basically the same as Embodiment 1, except that in this embodiment, the thin-walled column 1 includes a body 11 and a CFRP layer 12 covering the outer surface of the body 11 . The main body 11 includes a steel bar matrix 112 and a concrete cladding cast on the steel bar matrix 112 . The body 11 is hollow inside, and no steel pipe is provided.

[0041] In the preparation process of the thin-walled column 1 of this embodiment, concrete is first poured into the mold to form the main body 11, and the pouring method and concrete core density of the concrete poured into the mold meet the relevant construction standards; after 28 days of pouring and curing, the Wrap CFRP cloth on the outer surface of the main body 11 .

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Abstract

The invention relates to the technical field of bridge piers, in particular to a CFRP-UHPC double-limb thin-wall high pier stud. The CFRP-UHPC double-limb thin-wall high pier stud comprises a thin-walled column body, and the thin-walled column body comprises a body and a CFRP layer wrapping the outer surface of the body. The interior of the body is hollow, and the body comprises a UHPC layer. In the CFRP-UHPC double-limb thin-wall high pier stud, the ultrahigh compressive strength, toughness and durability of the UHPC are applied to the double-limb thin-wall high pier stud, so that the bearing capacity and ductility of the pier stud are effectively improved, and the anti-seismic property of the pier stud is better. Meanwhile, the hollow structure is adopted, due to the fact that the UHPC material cost is high, the bearing capacity of the pier column cannot be obviously reduced through the hollow structure, materials can be effectively saved, and the cost can be effectively reduced. Besides, the CFRP is arranged on the outer surface, so that the integrity of the structure is enhanced, the bearing capacity of the column is improved, and the advantage that the longitudinal thrust rigidity of the double-limb thin-wall high pier column is small is more outstanding.

Description

technical field [0001] The invention relates to the technical field of bridge piers, in particular to a CFRP-UHPC double-leg thin-walled high pier column. Background technique [0002] With the rapid development of the transportation network in Southwest my country, many bridges spanning valleys and rivers have sprung up. Among them, the continuous rigid frame bridge with high piers is the most common form of bridge structure. Compared with continuous girder bridges, rigid frame bridges can save expensive support costs due to the characteristics of pier and girder consolidation, and can also distribute the earthquake force in the horizontal direction to each pier to bear. The double-leg thin-walled pier is a commonly used pier form for high-pier rigid-frame bridges. Its structural feature is that there are two parallel pier walls hinged or rigidly connected to the main girder at the pier position. The double-leg thin-walled pier can not only support the upper structure and k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/02E01D101/26
CPCE01D19/02E01D2101/26E01D2101/266
Inventor 陈誉乐志诚方宇航郭毅李志慧冯刚
Owner FUZHOU UNIV