CN201121780Y

CN201121780Y - Steel pipe-FRP pipe internally filled concrete composite structure

Info

Publication number: CN201121780Y
Application number: CNU2007201308212U
Authority: CN
Inventors: 王静峰
Original assignee: Hefei University of Technology
Current assignee: Hefei University of Technology
Priority date: 2007-12-06
Filing date: 2007-12-06
Publication date: 2008-09-24
Anticipated expiration: 2017-12-06

Abstract

The utility model relates to a steel-pipe-FRP-pipe concrete-filled combinational structure, which is characterized in that the combinational structure is a hollow pipe column composed of a steel pipe that is used as the outer side wall, an FRP core pipe that is used as the inner side wall and a concrete layer that is firmly arranged between the steel pipe and the FRP core pipe. The combinational structure has good structural stress performance and earthquake resistance, can reduce the structural weight and improve the bending rigidity of the structure, and is convenient to be constructed and installed; the combinational structure can be used for reinforcing the modification engineering project, and is particularly suitable for being used as the column and the supporting component for buildings, bridges and special structures.

Description

A kind of steel pipe-FRP pipe core concrete combination structure

Technical field

The utility model relates to tubing, and a kind of being applied in the technical field of structural engineering of more specifically saying so can be used for strengthening and rebuilding engineering; Be particularly suitable for post and supporting member as building, bridge and special construction.

Background technique

The FRP pipe is meant that fibre reinforced composites (FRP) by the tubulose section bar that production technologies such as pultrusion, mold pressing and winding form, can be used for the structural engineering field.At present, in actual engineering, concrete filled steel tube and fiber reinforced plastic FRP confined concrete structure applications are more, and its principal mode is included in concreting in the steel pipe, or in FRP pipe fill concrete, or twine the load-bearing pillar of concrete formation solid section with FRP cloth.

In actual engineering, solid steel pipe concrete or FRP pipe concrete are normally used for axial compression or the eccentric less bending component of load.Yet, when member slenderness ratio or load eccentricity are big, its bearing capacity to a great extent will be by its flexural rigidity control, this moment, how many flexural rigidities solid steel pipe concrete or FRP pipe concrete can not provide near the material at centre of form position, cross section, but increased the deadweight of member, member section is also bigger simultaneously, makes effective usage space of building and structure reduce.

The model utility content

The utility model is for avoiding above-mentioned existing in prior technology deficiency, a kind of strengthening and rebuilding engineering that can be used for being provided; Be specially adapted to build, bridge and the post of special construction and the steel pipe-FRP pipe core concrete combination structure of supporting member, in the hope of obtaining good structure tension performance and anti-seismic performance, reduce the flexural rigidity of dead load and raising structure, be convenient to transportation and installation.

The utility model technical solution problem adopts following technological scheme:

The characteristics of the utility model steel pipe-FRP pipe core concrete combination structure be described composite structure be by as the steel pipe of outer side wall, as the FRP core pipe of madial wall and be cemented in steel pipe and FRP core pipe between the hollow tubing string that constitutes of concrete layer.

Structural feature of the present utility model is that also the section form of described composite structure is with the combination in any between the FRP core pipe of the steel pipe of circular, square or rectangle and circle, square or rectangle.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

1, the utility model has made full use of the premium properties of steel pipe, FRP pipe and concrete three kinds of materials and has interacted, the shortcoming when having remedied solid component as the big member of high-fineness ratio or load eccentricity.On the one hand, outer side wall steel pipe and FRP core pipe can the operative constraint concrete, can obviously improve the stress performance of concrete material; On the other hand, concrete layer has also effectively improved the strength and stiffness of FRP pipe, prevents steel pipe generation flexing, and flexural rigidity is big, from heavy and light, and stress performance and anti-seismic performance are good, and have superior fire resistance.

2, the utility model is after with steel pipe and FRP core pipe installation in position, and concreting between steel pipe and core pipe forms composite structure, can effectively reduce construction formwork expense and operating expenses.

3, the utility model is convenient to the member transportation, and construction and installation are quick, can be used for strengthening and rebuilding engineering; Be specially adapted to build, the post and the supporting member of bridge and special construction.

Description of drawings

Fig. 1 is the model utility structural representation.

Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9 are the different mode of execution structural representations of the utility model.

Number in the figure: 1 is that steel pipe, 2 is that FRP core pipe, 3 is concrete layer.

Below by embodiment, the utility model is described in further detail in conjunction with the accompanying drawings.

Embodiment:

Referring to Fig. 1, by as the steel pipe 1 of outer side wall, as the FRP core pipe 3 of madial wall and be cemented in steel pipe 1 and FRP core pipe 3 between concrete layer 2 constitute hollow tubing string.

In concrete the enforcement, the section form of composite structure is with the combination in any between the FRP core pipe 3 of the steel pipe 1 of circular, square or rectangle and circular, square or rectangle.Comprise:

The circular FRP core of circular steel pipe box shown in Figure 1 pipe concrete filled structure;

The square FRP core of circular steel pipe box pipe concrete filled structure shown in Figure 2;

Circular steel pipe box rectangle FRP core pipe concrete filled structure shown in Figure 3;

The circular FRP core of square bar pipe box shown in Figure 4 pipe concrete filled structure;

The square FRP core of square bar pipe box pipe concrete filled structure shown in Figure 5;

Square bar pipe box rectangle FRP core pipe concrete filled structure shown in Figure 6;

The circular FRP core of rectangle steel pipe box shown in Figure 7 pipe concrete filled structure;

The square FRP core of rectangle steel pipe box pipe concrete filled structure shown in Figure 8;

Rectangle steel pipe box rectangle FRP core pipe concrete filled structure shown in Figure 9.

Below in conjunction with drawings and Examples the technical solution of the utility model is described further.

In the present embodiment, steel pipe 1 can adopt regular tenacity steel or the yield strength high-strength steel more than 550Mpa, FRP core pipe 3 can adopt glass fibre GFRP pipe, carbon fiber CFRP pipe or aramid fibre AFRP pipe, and concrete can be normal concrete or compressive strength high-strength concrete and the self-compacting concrete at 80-120MPa.Concrete preparation is that the concreting layer 3 betwixt behind steel pipe 1 and FRP core pipe 3 installation in position, and the fixed formation of concrete layer promptly forms the composite structure of steel pipe-FRP pipe core concrete.

The utility model can specifically be applied to column piece, supporting element, truss in the civil engineering etc.

Claims

1, a kind of steel pipe-FRP pipe core concrete combination structure, it is characterized in that described composite structure be by as the steel pipe (1) of outer side wall, as the FRP core pipe (3) of madial wall and be cemented in described steel pipe (1) and FRP core pipe (3) between the hollow tubing string that constitutes of concrete layer (2).

2, steel pipe one FRP pipe concrete filled composite structure according to claim 1, the section form that it is characterized in that described composite structure is with the combination in any between the FRP core pipe (3) of the steel pipe (1) of circular, square or rectangle and circular, square or rectangle.