CN105200913A - Connecting structure for directly embedding carbon fiber tube concrete in base and construction method thereof - Google Patents

Abstract

The invention provides a connecting structure for directly embedding carbon fiber tube concrete in a base and a construction method of the connecting structure. The connecting structure comprises a concrete base, wherein carbon fiber tube concrete is embedded in the concrete base; the carbon fiber tube concrete comprises a carbon fiber sheath and a concrete layer which wraps the external portion of the carbon fiber sheath and one end of the carbon fiber tube concrete is embedded in the concrete base. By adopting the connecting structure for directly embedding the carbon fiber tube concrete in the base and the construction method of the connecting structure, connecting bars and pre-stressed reinforcements which need a complex installation process are cancelled; by filling and pouring the concrete in the sheath made of carbon fibers and directly embedding the sheath in structures such as a concrete support or a pile cap, and by comparing with other construction methods, the construction is simple and quick to perform and the structure bearing capacity, durability and corrosion resistance are strong. The bearing capacity and the deformation capacity in a certain direction of the structure can be controlled by controlling the layers and skew angles of the carbon fibers according to needs.

Description

A kind of carbon fiber pipe concrete directly embeds connecting structure and the construction method thereof of pedestal

Technical field

The present invention relates to connecting structure and construction method thereof that a kind of carbon fiber pipe concrete directly embeds pedestal.

Background technology

In traditional component connects, as pile cover is connected with abutment, for commensurate structure is out of shape and the requirement of power transmission, must pitman or post-tensioned prestressing muscle be set between two components; Also be common two kinds of types of attachment: sell excellent method and post-stress method.Sell excellent method i.e. two components by connecting pin or plunger transmitting force and moment of flexure.This kind of method construction is complicated, needs to carry out multiple detailed treatment to junction.Post-stress method is equally because complex procedures difficulty is adopted by engineer.

And the present invention by carbon fiber high for resistance to tension and the ingenious combination of ordinary concrete are made have high-strength pulling-resisting, pressure energy power, improved corrosion performance supporting pile be directly embedded in concrete pedestal or pile cover; this kind of method easy construction, quick; power transmission is simple; the pitman needing complicated mounting process can not only be removed from; can be protected well by anticorrosive carbon fiber pipe and limit core concrete again, the intensity of effective Concrete Structure, durability and ductility.By controlling the number of plies and the oblique angles of fiber, and then allow the carbon fiber pipe of laminate structure be designed to required strength and stiffness at specific direction, form the strong and weak shaft component that has on obvious mechanics, as the stake of one-way movement at vertical bridge to more yielding, better can adapt to the motion of superstructure.This pipe can effectively replace traditional strengthening measure.Secondly fill concrete wherein can effectively strengthen bending strength and rigidity, solves the cripling problem of pipe.By prefabricating technique and mixed type being built the advantage that can play concrete component fast pouring and system easy to control the quality etc.In addition, if embedded length is too small, when being namely less than critical embedded length Lcr, bonding failure is easily caused to occur in before potentiality play completely, so not only danger but also uneconomical, and by control embedded length can better control transmittance process and effectively play material property, raising component security performance.

Summary of the invention

The invention provides connecting structure and construction method thereof that a kind of carbon fiber pipe concrete directly embeds pedestal, design and construction are convenient, effectively can improve the intensity of structural concrete, durability and ductility.Effective minimizing structural repair expense.

First specific embodiments of the present invention is: a kind of carbon fiber pipe concrete directly embeds the connecting structure of pedestal, comprise concrete pedestal, described concrete pedestal is embedded with carbon fiber pipe concrete, described carbon fiber pipe concrete comprises carbon fiber sheath and is wrapped in the layer of concrete of carbon fiber sheath outside, and described carbon fiber pipe concrete one end embeds in concrete pedestal.

Further, described carbon fiber sheath is made up of multilayer carbon fiber pipe, and the carbon fiber pipe of every layer is crisscross arranged.

Further, described adjacent bilevel carbon fiber pipe phase angle is 45 ° to 90 °.

Further, described carbon fiber pipe concrete and concrete pedestal mating face are provided with adhesive glue.

Second specific embodiments of the present invention is: a kind ofly manufacture the construction method that carbon fiber pipe concrete as claimed in claim 1 directly embeds the connecting structure of pedestal, comprises the following steps:

(1) fiber that the multilayer utilized has certain skew angle manufactures carbon fiber sheath;

(2) the carbon fiber jacket inner wall formed in step (1) first fills adhesive glue, then fill concrete form carbon fiber pipe concrete after vibrating;

(3) appearance bonding in carbon fiber pipe concrete lower end embeds and to be embedded in concrete pedestal after district coats adhesive glue that to carry out formed by integrally casting shaping

Further, the tensile strength f' of technology carbon fiber per unit area before manufacturing carbon fiber sheath, then requires according to the predetermined deformation direction of formula one and formula two and component and vertical bearing load the oblique angles φ and the number of plies n that determine carbon fiber;

Formula one: $\frac{f_{cc}}{f_c}=1+1.5\sqrt{\frac{P}{f_c}}+2\·\frac{P}{f_c};$

Formula two: $n=\frac{P\·D}{2\·f^{\′}};$

Wherein: f _ccfor concrete limit ultimate strength;

P is measuring pressure needed for carbon fiber pipe inwall;

F _cfor fill concrete is without compressive strength during pressure measurement;

F' is the tensile strength of carbon fiber per unit area.

Further, the length X in carbon fiber pipe concrete component bonding embedding district is not less than critical embedded length Lcr; Wherein Lcr meets formula three,

Formula three: $\frac{L_{cr}}{D}=\sqrt{\frac{3\mathrm{\π}M}{D^3{f}_c}(1-0.5{\left(\frac{e}{D}+\frac{3}{8}\right)}^{-1})};$

In formula three: L _crfor critical bonded areas is long;

M is interface moment;

E is the bias voltage degree of axial load;

D is the diameter of carbon fiber pipe concrete component.

Compared with prior art, the present invention has following beneficial effect:

1. adopt connecting structure and the construction method thereof of the direct embedding pedestal of technique scheme, eliminate the pitman and presstressed reinforcing steel that need complicated mounting process; Adopt the sheath made of carbon fiber to fill concreting, and be directly embedded into as in the structure such as concrete bearing or pile cover, compare other construction method, its construction simple and fast and structural-load-carrying capacity, durability, decay resistance are strong.And the supporting capacity of control structure and the deformability in certain direction can be come by the number of plies and skew angle that control carbon fiber as required.

2. adopt connecting structure and the construction method thereof of the direct embedding pedestal of technique scheme, make connecting portion from the erosion of extraneous rainwater etc., real realization " zero dimension is protected ", improves durability and the application life of structure; The type of attachment simultaneously directly embedding pedestal is not only applicable to the design of bridge pile foundation, more can conveniently for there is the braced structures of specific direction distortion, and range of application is very extensive.

Accompanying drawing explanation

Fig. 1 is overall structure schematic diagram of the present invention;

Fig. 2 is carbon fiber pipe concrete construction schematic diagram of the present invention;

Fig. 3 is carbon fiber pipe concrete schematic diagram of the present invention.

In figure: 1-concrete pedestal, 2-carbon fiber pipe concrete embed concrete pedestal bonded areas, 3-carbon fiber pipe concrete, 4-layer of concrete, 5-carbon fiber sheath.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.

As shown in Fig. 1 ~ 2, a kind of carbon fiber pipe concrete directly embeds the connecting structure of pedestal, comprise concrete pedestal 1, described concrete pedestal 1 is embedded with carbon fiber pipe concrete 3, described carbon fiber pipe concrete 3 comprises carbon fiber sheath 5 and is wrapped in the layer of concrete 4 of carbon fiber sheath 5 outside, and described carbon fiber pipe concrete 3 one end embeds in concrete pedestal 1.

Described carbon fiber sheath 5 is made up of multilayer carbon fiber pipe, and the carbon fiber pipe of every layer is crisscross arranged.

In the present embodiment, described adjacent bilevel carbon fiber pipe phase angle is 45 ° to 90 °.

Described carbon fiber pipe concrete 3 is provided with adhesive glue with concrete pedestal mating face.

Second specific embodiments of the present invention is: a kind ofly manufacture the construction method that carbon fiber pipe concrete directly embeds the connecting structure of pedestal, comprises the following steps:

(4) fiber that the multilayer utilized has certain skew angle manufactures carbon fiber sheath;

(5) the carbon fiber jacket inner wall formed in step (1) first fills adhesive glue, then fill concrete form carbon fiber pipe concrete after vibrating;

(6) appearance bonding in carbon fiber pipe concrete lower end embeds and to be embedded in concrete pedestal after district coats adhesive glue that to carry out formed by integrally casting shaping

Further, the tensile strength f' of technology carbon fiber per unit area before manufacturing carbon fiber sheath, then requires according to the predetermined deformation direction of formula one and formula two and component and vertical bearing load the oblique angles φ and the number of plies n that determine carbon fiber;

Formula one: $\frac{f_{cc}}{f_c}=1+1.5\sqrt{\frac{P}{f_c}}+2\·\frac{P}{f_c};$

Formula two: $n=\frac{P\·D}{2\·f^{\′}};$

Wherein: f _ccfor concrete limit ultimate strength;

P is measuring pressure needed for carbon fiber pipe inwall;

F _cfor fill concrete is without compressive strength during pressure measurement;

F' is the tensile strength of carbon fiber per unit area.

The length X that carbon fiber pipe concrete component bonding embeds district is not less than critical embedded length Lcr; Wherein Lcr meets formula three,

Formula three: $\frac{L_{cr}}{D}=\sqrt{\frac{3\mathrm{\π}M}{D^3{f}_c}(1-0.5{\left(\frac{e}{D}+\frac{3}{8}\right)}^{-1})};$

In formula three: L _crfor critical bonded areas is long;

M is interface moment;

E is the bias voltage degree of axial load;

D is the diameter of carbon fiber pipe concrete component.

The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.

Claims (7)

1. a carbon fiber pipe concrete directly embeds the connecting structure of pedestal, it is characterized in that, comprise concrete pedestal, described concrete pedestal is embedded with carbon fiber pipe concrete, described carbon fiber pipe concrete comprises carbon fiber sheath and is wrapped in the layer of concrete of carbon fiber sheath outside, and described carbon fiber pipe concrete one end embeds in concrete pedestal.

2. a kind of carbon fiber pipe concrete according to claim 1 directly embeds the connecting structure of pedestal, it is characterized in that, described carbon fiber sheath is made up of multilayer carbon fiber pipe, and the carbon fiber pipe of every layer is crisscross arranged.

3. a kind of carbon fiber pipe concrete according to claim 2 directly embeds the connecting structure of pedestal, it is characterized in that, described adjacent bilevel carbon fiber pipe phase angle is 45 ° to 90 °.

4. a kind of carbon fiber pipe concrete according to claim 1 directly embeds the connecting structure of pedestal, it is characterized in that, described carbon fiber pipe concrete and concrete pedestal mating face are provided with adhesive glue.

5. manufacture the construction method that carbon fiber pipe concrete as claimed in claim 1 directly embeds the connecting structure of pedestal, comprise the following steps:

(1) fiber that the multilayer utilized has certain skew angle manufactures carbon fiber sheath;

(2) the carbon fiber jacket inner wall formed in step (1) first fills adhesive glue, then fill concrete form carbon fiber pipe concrete after vibrating;

(3) appearance bonding in carbon fiber pipe concrete lower end embeds and to be embedded in concrete pedestal after district coats adhesive glue that to carry out formed by integrally casting shaping.

6. a kind of carbon fiber pipe concrete according to claim 5 directly embeds the connecting structure construction method of pedestal, it is characterized in that, the tensile strength f' of technology carbon fiber per unit area before manufacturing carbon fiber sheath, then requires according to the predetermined deformation direction of formula one and formula two and component and vertical bearing load the oblique angles φ and the number of plies n that determine carbon fiber;

Formula one: $\frac{f_{cc}}{f_c}=1+1.5\sqrt{\frac{P}{f_c}}+2\·\frac{P}{f_c};$

Formula two: $n=\frac{P\·D}{2\·f^{\′}};$

Wherein: f _ccfor concrete limit ultimate strength;

P is measuring pressure needed for carbon fiber pipe inwall;

F _cfor fill concrete is without compressive strength during pressure measurement;

F' is the tensile strength of carbon fiber per unit area.

7. a kind of carbon fiber pipe concrete according to claim 5 directly embeds the connecting structure construction method of pedestal, it is characterized in that, the length X that carbon fiber pipe concrete component bonding embeds district is not less than critical embedded length Lcr; Wherein Lcr meets formula three,

Formula three: $\frac{L_{cr}}{D}=\sqrt{\frac{3\mathrm{\π}M}{D^3{f}_c}(1-0.5{\left(\frac{e}{D}+\frac{3}{8}\right)}^{-1})};$

In formula three: L _crfor critical bonded areas is long;

M is interface moment;

E is the bias voltage degree of axial load;

D is the diameter of carbon fiber pipe concrete component.