CN101864827A

CN101864827A - Anchor design of pre-stressed carbon fiber reinforced plastic rib group

Info

Publication number: CN101864827A
Application number: CN200910049361A
Authority: CN
Inventors: 陈铖
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-15
Filing date: 2009-04-15
Publication date: 2010-10-20

Abstract

The invention discloses an anchor design of a tensile carbon fiber reinforced plastic (CFRP) rib group. The CFRP rib is wrapped by using a soft metal layer so that the surface of the rib is uniformly stressed, and shearing damage and crushing damage are avoided; the force required for anchoring consists of two parts, wherein one part is the adhesion of the epoxy resin between the CFRP rib and the soft metal layer, while the other part is a horizontal component force produced by squeezing the CFRP rib with a conical plug and due to the angle per se; in order to prevent stress concentration, the force of the second part is limited on the rear half part of the entire soft metal layer; and the entire anchor is fixed to an anchor plate by using the conical plug; the other end of the anchor is connected with a pull rod and can be anchored by using an engineering jack in a tensile way; and the entire CFRP rib can be finally fixed to the two ends of a concrete beam by using the anchor at the previous end for anchoring after the tensile anchoring. The anchor has the characteristics of high operability, high usability and low cost.

Description

The ground tackle design of pre-stressed carbon fiber reinforced plastic rib group

Technical field

The art of this patent relates to the Construction of Civil Engineering field, is applicable to the anchoring of pre-stressed carbon fiber reinforced plastic rib (CFRP).

Background technology

Pre-stressed carbon fiber reinforced plastic rib (Carbon Fiber Reinforced Polymer) is called for short CFRP, is a kind of reinforcing bar substitution material.In reinforcing bar utilization today more and more widely, some drawbacks of reinforcing bar have also caused increasing trouble to engineering.Such as the easy corrosion of reinforcing bar, after using for a long time, structure can cause danger because these corrosion intensity descend.Also have, though the proportion of reinforcing bar is more outstanding than concrete, in today that the span of bridge is more and more grown, its proportion has become the human more principal element of long span building of making of restriction.CFRP has high-strength light as the substitution material of reinforcing bar, not corrosion, and various environment such as acid and alkali resistance, salt, tensile strength and modulus of elasticity are also very outstanding simultaneously.

In the suspension cable of bridge with CFRP replace reinforcing bar can: 1. increase the span of bridge, more engineering can be realized; 2. remove building from and cause the expense that is used to safeguard back every year; 3. effectively reduce the use of other respective material.

But the application of CFRP also has been subjected to a lot of restrictions, engineering practice shows that in the time of structural deterioration, the internal force of CFRP only is 30% of limit internal force, the intensity that is to say it can not get performance, and the part that restricts its performance largely is exactly the ground tackle of CFRP.Because though the intensity that CFRP axle draws is big, its shearing resistance and measuring body ability very a little less than, this makes relatively difficulty of ground tackle design.

So need design corresponding ground tackle according to the characteristics of CFRP muscle, all more or less there are some problems in the linear ground tackle that uses at present.

Summary of the invention

The content of this patent invention is exactly at the CFRP muscle, designs a kind of ground tackle that can stretch-draw CFRP muscle group.

In order to reach above-mentioned target, this patent utilization at first utilize soft metal layer parcel CFRP muscle, make the surperficial stressed more even of muscle, avoid occurring the situation that cuts up and damage by pressure.The needed power of anchoring is made up of two parts then, and a part is the adhesion stress of the epoxy resin between CFRP muscle and the soft metal layer, the component of the horizontal direction that produces owing to angle own when another part is tapered plug extruding CFRP muscle.Concentrated in order to prevent stress, the power of second portion is limited in the latter half of of entire soft metal layer.At last, by tapered plug whole ground tackle is fixed on the anchor slab.

Description of drawings

Be some brief introductions of accompanying drawing below

Fig. 1: the ground tackle vertical view, each ground tackle is made up of several identical sub-ground tackles, and they embed in the anchor slab

Fig. 2: the structural representation of ground tackle anchored end

Fig. 3: anchor slab schematic diagram

Fig. 4: tapered plug, CFRP and sleeve schematic diagram

Figure labeling description: A is a tapered plug, and B is an anchor slab, and C is a sleeve, and D is the slit of sleeve and CFRP muscle, and filling epoxy resin, E are CFRP

The specific embodiment

At first, the CFRP muscle is put in the sleeve, infusion epoxy resin, mix epoxy sand:

Then, wait certain intensity to form after, sleeve is rotated in the tapered plug;

Afterwards, tapered plug is put in the anchor slab;

Then, after forming certain intensity, utilize jack with smaller power stretch-draw CFRP muscle, treat to be stretched to when intensity is completed into design strength at the other end of ground tackle;

Then, use same ground tackle, also ground tackle is fixed on the concrete beam end and gets final product at the stretch-draw end;

At last, in other anchor hole, also ground tackle is installed and get final product.

Claims

1. pre-stressed carbon fiber reinforced plastic rib anchor system, by tapered plug, soft metal layer, sleeve, pre-stressed carbon fiber reinforced plastic rib and anchor slab are formed, and prestressing carbon fiber plastic is wrapped up by soft metal layer, pass through epoxy gluing, soft metal layer is connected with tapered plug by the screw thread on surface, by the jacket casing residence material is arranged at last, is fixed on the anchor slab.

2. require described pre-stressed carbon fiber reinforced plastic rib ground tackle according to right 1, it is characterized in that CFRP is wrapped up by soft metal layer, soft metal layer and sleeve are by being threaded.

3. require described pre-stressed carbon fiber reinforced plastic rib ground tackle according to right 1, it is characterized in that sleeve is conical.

4. require described pre-stressed carbon fiber reinforced plastic rib ground tackle according to right 1, it is characterized in that soft metal layer some in sleeve, a part is imbedded in the concrete in addition.