CN204112600U - New type FRP rib tape screw plug bond type anchorage - Google Patents

Abstract

The utility model relates to a novel FRP tendon strip screw plug bonded anchorage, which includes an anchor barrel and an annular gasket, the two ends of the anchor barrel are respectively bonded with annular gaskets, and also includes a screw plug, the screw plug and the anchor barrel The tension end is screwed, and the center of the ring gasket is provided with a central through hole for fitting the FRP tendon, and the center of the ring gasket is located on the center line of the anchor cylinder. The utility model FRP tendon strip screw plug bonded anchorage through the design of the screw plug at the end improves the interaction between the anchor barrel and the adhesive, strengthens the constraint on the longitudinal slip of the adhesive, and effectively prevents sticking. The cement slides out, which reduces the length of the anchoring device. Compared with the traditional bonded anchorage, the same length of the anchor tube can increase the bearing load; and the anchorage parts do not need special processing, low material requirements, and simple structure. The design is reasonable, the use is convenient, the installation process is simple, and the cost is low. The screw plug is connected with the anchor barrel by threads to improve the anchoring efficiency.

Description

A new type of FRP rib with screw plug bonded anchor

technical field

The utility model relates to the anchoring of tensile tendons (cables) in civil engineering, in particular to a novel FRP tendon with screw plugging bonded anchorage. the

Background technique

In erosive environments, steel bars or prestressed steel strands in reinforced concrete structures are prone to corrosion, leading to durability problems in concrete structures. Fiber Reinforced Polymer (FRP) bars have the advantages of light weight, high strength, corrosion resistance, low relaxation and good fatigue resistance. Using FRP bars as longitudinal bars or prestressed bars in concrete structures can improve the strength of concrete. The durability of the structure has good economic and social benefits. the

FRP tendons are composed of two parts: fiber and polymer matrix, which are anisotropic materials, and their shear strength is far lower than the tensile strength. In the tensile test, direct clamping of FRP tendons is likely to cause shear failure of the clamping section, and its tensile strength cannot be obtained; the traditional clip-type anchors used in prestressed reinforced concrete structures are used for prestressed FRP tendons Anchorage will easily cause the FRP tendon to be sheared at the anchorage, and its tensile strength cannot be fully exerted. Around the anchoring of FRP tendons, relevant research has been carried out at home and abroad, and corresponding anchorages have been developed. For example, in order to enhance the bonding force between the adhesive and the anchor cylinder, the anchor cylinder with a continuous tapered section on the inner wall is used; in order to prevent the FRP tendon from being pinched, a tapered soft metal clip is used. However, the length of the anchor cylinder of the existing FRP tendon bonded anchor is too large, and the processing of the improved bonded or clipped anchor is complicated and the cost is high. Therefore, it is of great significance to develop an FRP tendon anchorage device that is easy to process and easy to use to promote the research and application of FRP tendons. the

Utility model content

The utility model aims at the deficiencies and defects of the prior art, and provides an FRP tendon strip screw plugging bonded anchorage with small anchoring length, simple processing and good anchoring performance. the

In order to achieve the above purpose, the technical solution adopted by the utility model is: a new type of FRP rib and screw plugging bonded anchorage, including an anchor cylinder and an annular gasket, and the two ends of the anchor cylinder are respectively fixed with an annular gasket, It also includes a screw plug, the screw plug is threadedly connected with the tension end of the anchor cylinder, a central through hole for fitting FRP bars is provided at the center of the ring gasket, and the center of the ring gasket is located on the center line of the anchor cylinder superior. the

In the above-mentioned novel FRP tendon with plug-plug bonded anchorage, the plug is composed of a cylindrical section connected to the outer wall of the anchor tube, a variable diameter section and a cylindrical boss section set on the outer surface of the FRP tendon. the

In the above-mentioned novel FRP tendon-screw-plug bonded anchorage, the structure of the anchor barrel is cylindrical with a straight inner wall; the annular gasket is pasted on the end surface of the anchor barrel by an adhesive. the

The beneficial effects of the utility model are:

The utility model FRP tendon strip screw plug bonded anchorage through the design of the screw plug at the end improves the interaction between the anchor barrel and the binder, strengthens the constraint on the longitudinal slip of the binder, and effectively prevents sticking. The cement slides out, which reduces the length of the anchoring device. Compared with the traditional bonded anchorage, the same length of the anchor tube can increase the bearing load (see Table 1 for the comparison table of specimen form and test structure); and the anchorage The components do not require special processing, low material requirements, simple structure, reasonable design, easy to use, simple installation process, low cost, and the screw plug is connected with the anchor barrel by threads to improve the anchoring efficiency. the

Description of drawings

Fig. 1 is the structural schematic diagram of the longitudinal section of the utility model FRP rib with screw plugging bonded anchorage;

Fig. 2 is a schematic diagram of the front view of the annular gasket of the utility model FRP rib with screw plugging bonded anchorage;

Fig. 3 is a side view structural schematic diagram of the ring gasket of the FRP rib with screw plug bonded anchorage of the utility model;

Fig. 4 is a schematic structural diagram of A-A in Fig. 1 .

The meanings of the symbols in the figure are: 1. FRP tendon, 2. External thread, 3. Anchor barrel, 4. Adhesive, 5. Ring gasket, 6. Screw plug, 7. Ring gasket, 8. Central channel hole. the

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

Embodiment 1: Referring to Figures 1 to 4, a new type of FRP tendon and screw plug bonded anchorage includes an anchor barrel 3 and an annular gasket, and the two ends of the anchor barrel are respectively bonded with annular gaskets 5 and 7, Among them, one end of the anchor barrel 3 is a free end, and the other end is a tension end. The free end is pasted with an annular gasket 5, and the tension section is pasted with an annular gasket 7. It also includes a screw plug 6, which is threaded with the tension end of the anchor barrel 3. In connection, the centers of the annular gaskets 5 and 7 are respectively provided with a central through hole for fitting FRP tendons, and the centers of the annular gaskets are located on the centerline of the anchor cylinder 3 . The screw plug 6 is composed of a cylindrical section connected to the outer wall of the anchor tube 3, a diameter reducing section and a cylindrical boss section set on the outer surface of the FRP bar, and the screw plug 6 adopts a diameter reducing joint. The structure of the anchor tube 3 is a cylindrical tube with a straight inner wall, which is made of seamless steel pipe. The ring gasket 5 and the ring gasket 7 are pasted on the end surface of the anchor tube 3 respectively.

The installation method of the utility model installed on the FRP bar is: comprising the following steps:

Step 1: Clean and derust the inside of the anchor barrel 3, and process the external thread 2 on the tensile end of the anchor barrel 3;

Step 2: Fix the ring gasket 5 on the free end surface of the anchor cylinder 3 and seal it;

Step 3: Put one end of the FRP tendon 1 into the screw plug 6;

Step 4: Fill the anchor barrel 3 with adhesive from the tensile end of the anchor barrel 3 until the inside of the anchor barrel 3 is filled with the adhesive, and the glue filling is completed, and then set the FRP tendon 1 on one end of the screw plug 6 Insert the central through hole of the annular gasket 7 at the tension end into the anchor cylinder 3, so that its end enters the central through hole 8 of the annular gasket at the free end of the anchor cylinder 3;

Step 5: Fix the ring gasket 8 on the tensile end surface of the anchor barrel 3, and then connect the screw plug 6 with the external thread 2 on the anchor barrel 3 through the internal thread;

Step 6: After the adhesive is solidified, remove the seal at the free end of the anchor barrel 3;

Step 7: Follow steps 1 to 6 to install the anchor at the other end of the FRP tendon.

The utility model FRP tendon strip screw plug bonded anchorage through the design of the screw plug at the end improves the interaction between the anchor barrel and the binder, strengthens the constraint on the longitudinal slip of the binder, and effectively prevents sticking. The binder slides out, carrying the load. the

The above specific implementation methods are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present utility model should be included in the Within the protection scope of the present utility model. the

Claims (4)

1. a new type FRP rib tape screw plug bond type anchorage, comprise anchor cylinder and annular gasket, described anchor cylinder two ends are fixed with annular gasket respectively, it is characterized in that: also comprise screw plug, screw plug is threaded by pull end with anchor cylinder, described annular gasket circle centre position is provided with one for being set with the central through hole of FRP muscle, and the center of circle of this annular gasket is positioned on the center line of described anchor cylinder.

2. new type FRP rib tape screw plug bond type anchorage according to claim 1, is characterized in that: described screw plug is made up of the cylinder barrel segment be connected with anchor drum outer wall, reducer and the cylinder boss section that is sleeved on FRP muscle external surface.

3. new type FRP rib tape screw plug bond type anchorage according to claim 1, is characterized in that: described anchor barrel structure is the straight cylinder barrel shaped of inwall.

4. new type FRP rib tape screw plug bond type anchorage according to claim 1, is characterized in that: described annular gasket is pasted onto on anchor cylinder end face by cementing agent.