CN103590540B - The anchoring hookup of carbon fiber enhancement resin base composite material plate - Google Patents

Abstract

The invention provides an anchoring and connecting device for a carbon fiber reinforced resin-based composite material plate, which includes two aluminum plates, a carbon fiber plate and a steel connector, and the steel connector includes an upper steel splint, a lower steel splint, and a plurality of compression bolts , multiple anchor bolts and multiple glue injection hole bolts, two aluminum plates are respectively glued to the upper surface and lower surface of one end of the carbon fiber plate, and the end carbon fiber plate is fastened to the clamp formed by the upper steel splint and the lower steel splint through the anchor bolts the upper steel splint, the end carbon fiber plate and the lower steel splint are fastened together by the compression bolts, and the adhesive is injected into the slot through the glue injection hole to make the upper steel splint, the carbon fiber plate with the aluminum plate adhered, and the upper steel splint Bonded to the lower steel splint. The invention evenly transfers the external stress to the carbon fiber plate, thereby avoiding the direct application of mechanical compressive stress to the carbon plate, resulting in uneven force on the carbon plate, transverse fracture, and anchoring failure, thereby improving the connection and anchoring reliability of the carbon fiber plate.

Description

Anchorage coupling device for carbon fiber reinforced resin matrix composite panels

technical field

The invention relates to an anchoring connection device for a carbon fiber reinforced resin matrix composite material plate.

Background technique

Carbon fiber plate is a new type of high-strength material. For example, its tensile strength can reach 7-10 times that of ordinary steel, and with the advancement of science and technology, the mechanical properties of carbon fiber plate are still improving. In the field of civil engineering applications, carbon fiber panels are often used for external bonding reinforcement of concrete or steel structures to improve the bearing capacity and fatigue resistance of the structure. Applying a certain prestress to the carbon fiber plate can more effectively exert the high strength of the carbon fiber plate and improve the economy of carbon fiber structure reinforcement. However, due to the large modulus, high brittleness, and low transverse shear strength and transverse compressive strength of the carbon fiber plate, simple clamping and anchoring will lead to brittle fracture of the carbon fiber plate; in addition, the carbon fiber plate has a certain width, and it is difficult to achieve A uniformly distributed tensile stress is formed on the carbon fiber sheet. Therefore, how to reliably apply prestress to carbon fiber panels and give full play to the tensile properties of carbon fiber panels is an urgent problem to be solved.

Contents of the invention

Based on the above deficiencies, the object of the present invention is to provide an anchoring and coupling device for carbon fiber reinforced resin matrix composite material panels, which can realize mechanical anchoring and coupling of carbon fiber panels.

The present invention adopts the following technology: an anchoring and connecting device for a carbon fiber reinforced resin matrix composite material plate, including two aluminum plates, a carbon fiber plate and a steel connector, and the steel connector includes an upper steel splint, a lower steel splint, a plurality of pressing Tightening bolts, multiple anchor bolts and multiple glue injection hole bolts, two aluminum plates are respectively glued to the upper surface and lower surface of one end of the carbon fiber plate, and the carbon fiber plate at this end is fastened to the upper steel splint and the lower steel splint by the anchor bolts to form the upper steel splint, the end carbon fiber plate and the lower steel splint are fastened together by the compression bolts, and the adhesive is injected into the card slot through the glue injection hole, so that the upper steel splint, the carbon fiber plate with the aluminum plate, the upper The steel splint and the lower steel splint are bonded together to prevent the intrusion of air, water and other corrosive substances, and then the glue injection hole is blocked by the glue injection hole bolt.

The present invention also has the following technical features:

The volume shrinkage rate of the adhesive after curing is less than 2%, and the shear strength of the adhesive with the aluminum sheet and the carbon plate after curing is greater than 14MPa.

The present invention transmits the external stress evenly to the carbon fiber plate by shearing the adhesive between the aluminum plate and the carbon fiber plate, which has high toughness relative to the carbon fiber plate, so as to avoid the direct application of mechanical compressive stress to the carbon plate, resulting in insufficient force on the carbon plate Uniform, transverse fracture, anchor failure. The shrinkage rate of the adhesive is low after curing, which can avoid large internal stress during the curing process of the adhesive, thereby avoiding the failure of the bond between the aluminum sheet and the carbon plate during long-term service, and improving the connection and anchoring reliability of the carbon fiber sheet.

Description of drawings

Fig. 1 is the carbon fiber plate schematic diagram that the present invention is glued with aluminum plate;

Fig. 2 is a schematic diagram of a steel connector;

Fig. 3 is a top view of the upper steel plywood plate;

Fig. 4 is a side view of the upper steel splint;

Fig. 5 is a top view of the lower steel splint;

Figure 6 is a side view of the lower steel splint.

Among them, 1. Adhesive, 2. Aluminum plate, 3. Carbon fiber plate, 4. Upper steel splint, 5. Anchor bolt, 6. Compression bolt, 7. Glue injection hole bolt, 8. Carbon plate channel.

detailed description

The present invention is described in detail below in conjunction with accompanying drawing:

Example 1

As shown in Figures 1-6, an anchoring and coupling device for carbon fiber reinforced resin-based composite material plates includes two aluminum plates 2, carbon fiber plates 3 and steel connectors, and the steel connectors include an upper steel splint 4, a lower steel splint Plywood, 2 compression bolts 6, 4 anchor bolts 5 and 4 glue injection hole bolts 7, two aluminum plates 2 are glued to the upper surface and the lower surface of one end of the carbon fiber plate 3 respectively, and the carbon fiber plate at the end is fixed through the anchor bolt 5 3 Fasten in the clamping groove formed by the upper steel splint 4 and the lower steel splint; the compression bolt 6 fastens the upper steel splint, the end carbon fiber plate 3 and the lower steel splint together, and injects them into the clamping groove through the glue injection hole 7 The adhesive is injected to bond the upper steel splint 4, the carbon fiber plate 3 with the aluminum plate and the lower steel splint together, so that the two aluminum plates 2, the carbon fiber plate 3 and the steel connector are solidified into one, which improves the connection reliability and prevents The immersion of air, water and other corrosive substances improves the durability of the connection, and then seals the injection hole through the injection hole bolt. The adhesive can be cured at room temperature or high temperature, but its volume shrinkage rate is less than 2%; after curing, the shear strength with the aluminum sheet and the carbon plate is greater than 10 MPa.

Example 2

The mechanism of the invention is to transmit the stress of the steel connector to the carbon fiber plate through the bonding force between the aluminum plate and the carbon fiber, thereby avoiding the difficulty of mechanically anchoring the carbon plate.

The card groove formed by the combination of the upper and lower steel splints can hold the aluminum plate at the end of the carbon fiber plate, and at the same time, the end of the carbon fiber plate and the steel connector are integrated by pressing the bolt and adhesive. In this way, through the anchoring and bonding of steel connectors, the anchoring connection of carbon fiber plates can be realized, and its application in prestressed reinforcement and other fields can be developed.

Bonding of carbon fiber plate and aluminum plate: First, evenly sand the carbon fiber plate with 400-grit sandpaper, then clean the abrasive debris with acetone, and dry it; The aluminum plate is polished, then cleaned with acetone, and dried; the thickness of the aluminum plate is uniform, and its width is consistent with the width of the carbon plate. According to the thickness of the carbon plate, the length of the aluminum plate is between 50mm and 200mm.

Adhesive (such as 3620 super structural adhesive produced by Shanghai Kangda Chemical New Material Co., Ltd.) is evenly applied to the polished surface of the aluminum plate and carbon fiber, squeezed carefully to squeeze out the excess adhesive, and solidified under a certain pressure.

Put the carbon fiber plate with the aluminum plate into the clamp groove between the upper and lower steel splints of the steel connector, apply pre-pressure to the aluminum plate by tightening the compression bolts, and then inject structural adhesive into the clamp groove through the glue injection hole (such as Shanghai Kang 3620 Super Structural Adhesive produced by Da Chemical New Material Co., Ltd.). After solidification, the carbon fiber sheet and the steel connector are anchored and connected.

Claims (1)

1. the anchoring hookup of a carbon fiber enhancement resin base composite material plate, comprise two blocks of aluminium sheets, carbon fiber board and steel connector, it is characterized in that: described steel connector comprises steel clamp plate, lower steel clamp plate, multiple hold-down bolt, multiple anchor bolt and multiple hole for injecting glue bolt, two blocks of aluminium sheets are bonded at upper surface, the soffit of carbon fiber board one end respectively, are fastened in the draw-in groove of upper steel clamp plate, the formation of lower steel clamp plate by anchor bolt by this end carbon fiber board; Hold-down bolt tightens together upper steel clamp plate, this end carbon fiber board and lower steel clamp plate, in draw-in groove, bonding adhesive is injected by hole for injecting glue, make steel clamp plate, be stained with the carbon fiber board of aluminium sheet and lower steel clamp plate is bonded together, prevent the immersion of air, moisture content and other corrosive substances, then by hole for injecting glue bolt shutoff hole for injecting glue; After described adhesive solidification, cubical contraction is less than 2%; Rear and aluminium sheet and carbon fiber board the shear strength of solidification is all greater than 10MPa.