JP2005516136A - Reinforcing device - Google Patents

Abstract

Reinforcement for support structures has narrow anchoring sections at one or both ends. It has a laminated structure consisting of separate layers (2) separated by intermediate layers (3), at least in the anchoring section. Independent claims are included for: (1) A method for making the reinforcement; and (2) A method for reinforcing or repairing buildings using the reinforcement.

Description

  The present invention relates to a reinforcement device for a support structure comprising a thin layer structure extending into an anchor device. The thin layer structure is composed of a plurality of separate or separable individual layers on which an intermediate layer is disposed. The invention also relates to a method of making such a reinforcing device and a method of reconstructing and / or reinforcing a structure based on such a reinforcing device.

The prior art document discloses similar types of reinforcing devices. In this device, the ends of a thin CFK layer intended for reinforcement of a support element, such as a concrete support, are separated into two layers of substantially equal thickness, and each within the end element It is affixed in a suitable support slot arranged at a predetermined angle. This arrangement is then applied to the tension side of the support element by means of a thin GFK layer with pre-tension opposite to the support element directly above the end element as a precaution. The end element can be fixed in a suitable recess in the support element or, if necessary, by applying a longitudinally perpendicular tension device on the surface of the support element using an adhesive and / or a plug. Can be directly fixed (see, for example, Patent Document 1).
International Patent Application No. PCT / CH98 / 00346 (International Publication No. 99/10613 Pamphlet)

  However, especially in the region where this type of reinforcing device extends into the anchor device, the uncommitted changes in cross-section usually result in a considerable force acting longitudinally perpendicular to the main axis of the reinforcing device. Come back. This creates a “pre-set breaking point” that is not desired for this similar type of reinforcing device. Over a period of time, they can damage the reinforcing device and eventually affect its strength to the extent that the entire device breaks.

  Thus, to protect against this problem, a suitable longitudinally orthogonal tensioning device is frequently used in the region where this type of reinforcing device extends into the anchor device. However, the device itself suffers damage and leads to additional complexity and cost for overall construction. Furthermore, frequent consequences of the reinforcement device being stressed up to its load limit and beyond the direction of the main axis result in damage due to the load bearing fixation of the thin layer structure in the area around the fixation device. Can occur.

The purpose of the invention under consideration herein is therefore to overcome the drawbacks associated with the state of the art of existing technology and to be unbreakable and to withstand stresses in the region near the entrance to the anchor device. A maximum loading of the supporting main anchorage in the direction of the main axis in the main axis direction without any difficulty
It is to provide a reinforcing device that can withstand the main axis).

  This object is achieved with the aid of a reinforcing device according to the invention. According to the features of claim 1 of the claims, the reinforcing device for a support structure as per the present invention comprises a thin layer structure extending into the anchor device. This thin layer structure consists of a plurality of separate or separable individual layers. Between these layers, an intermediate layer is arranged in at least some parts and preferably in the area around the anchor device, a method of making such a reinforcement device, and a reconstruction and / or building based on such a reinforcement device Reinforcement methods are also available. Preferably, the thin layer structure consists of a thin layer of carbon fiber reinforced plastic (CFK) as a separate layer embedded in a thermoplastic matrix. Preferably, the individual layers consisting of a thin-layer structure are based on conventional thermoplastic materials, and further reinforcing inserts or metal plates are arranged as intermediate layers, preferably bidirectionally oriented reinforcing materials, In particular, an aramid fiber reinforcing material oriented in both directions is inserted.

  The present invention relates to a reinforcing device for a support structure comprising a thin layer structure extending in a stationary device. A thin layer structure consists of a plurality of separate or separable separate layers, with an intermediate layer disposed between these layers. Methods for making such reinforcement devices and methods for building reconstruction and / or making reinforcement reinforcements based on such reinforcement devices have also been made available. Preferably, the thin layer structure consists of a thin layer of carbon fiber reinforced plastic (CFK) as a separate layer embedded in a thermoplastic matrix. Preferably, the separate layers of the thin-layer structure are based on conventional thermoplastics and as a middle layer further reinforcement inserts or metal plates, most preferably bidirectionally oriented textile reinforcements, in particular both An aramid fiber reinforcement oriented in the direction is inserted.

Method of practicing the present invention The present invention relates to a reinforcing device for a support structure comprising a thin layer structure extending into an anchor device. A thin layer structure consists of a plurality of separate or separable separate layers, with an intermediate layer disposed between these layers. Preferably, both ends of the laminar structure in such a reinforcing device extend into the anchor device. In a preferred embodiment, such a reinforcing device has a thin layer structure consisting of a thin layer of carbon reinforced plastic (CFK) as a separate layer. Preferably, a separate layer of reinforcing device is embedded in the thermoplastic matrix. Preferably, the separate layers of the thin layer structure are based on conventional thermoplastic materials. According to a further preferred embodiment of the reinforcing device, as the intermediate layer, further reinforcing material inserts or metal plates, preferably bi-directionally oriented reinforcing materials, in particular bi-directionally oriented aramid fiber reinforcing materials, are interposed. According to a preferred embodiment of the reinforcing device, the anchor device has at least two hollow body parts constituting a hollow body surrounding both ends of the thin layer, preferably at least two said hollow body parts penetrate the thin layer structure. Connected by cylindrical holes, and most preferably at least two said hollow body portions are screwed together. The use of thermoplastic materials in this case is associated with a considerable additional advantage in that heated equipment can be used to make very well targeted and carefully positioned openings in the material. Yes. As a result, the embedded carbon fiber can avoid the equipment, and therefore the relief is damaged anyway by the drilling action. This has a beneficial effect commensurate with the robustness of the entire reinforcing device and thus its ability to withstand axial stresses.

  Another form of construction includes an anchor device comprising at least one axially adjustable cylinder. In particular, this configuration consists of a cylinder adjustable at least in the axial direction, preferably a steel cylinder rotatable at least about the axis, or most preferably a cylinder made of fiber-reinforced plastic material, which can be fitted with a coupling screw. . In a preferred configuration, the anchor device includes a chuck head that can be preferably adjusted and locked by an axially guided threaded rod.

The invention further relates to a method of manufacturing a reinforcing device as described above.
This method is characterized by including the following steps (a) to (d).
(A) fanning a conventional thin layer in a manner known per se into a plurality of individual layers;
(B) interposing a plurality of intermediate layers between the individual layers made according to step (a);
(C) combining the thin layer structures using the effects of heat and / or pressure to create a sandwich package;
(D) securing the securing device with a suitable clamping device.

According to the structure which carried out another form, it is characterized by including the following steps (a)-(c).
(A) combining a plurality of conventional individual layers of conventional thin layer structures and a plurality of conventional intermediate layers to form thin layer structures arranged in an alternating manner;
(B) bonding the thin layer structure using the effect of heat and / or pressure to make a sandwich package;
(C) fixing the fixing device with the aid of a suitable clamping device.

  A preferred configuration for such a method is characterized in that the method comprises further steps. In this method, the cross-section of the thin layer structure in the region connecting with the anchor device is further expanded by including individual layers and / or intermediate layers are included in the thin layer structure, preferably in an alternating manner. .

  A further preferred embodiment of such a method is characterized in that the ends of the laminar structure extend in each case into the anchor device.

  A further preferred embodiment of such a method is characterized in that the thin layer structure comprises a thin layer of carbon fiber reinforced plastic (CFK) as an intermediate layer.

  A further preferred embodiment of such a method is characterized in that the individual layers of the thin-layer structure are embedded in a thermoplastic matrix.

  A further preferred embodiment of such a method is characterized in that the individual layers of the laminar structure are based on conventional thermoplastic materials.

  A further preferred embodiment of such a method is that as an intermediate layer between the individual layers of the thin-layer structure, a reinforcement insert or a metal plate, preferably a bidirectionally oriented reinforcement, in particular a bidirectionally oriented aramid fiber reinforcement. Is arranged.

  A further preferred embodiment of such a method is characterized in that the anchor device comprises at least two hollow body parts constituting at least two hollow bodies surrounding the ends of the lamina.

  A further preferred aspect of such a method is that the anchor device comprises at least one axially adjustable cylinder, preferably mounted so that it can rotate axially and made of steel, and comprising a coupling screw. It consists of at least one cylinder.

  A further preferred embodiment of such a method is characterized in that the anchoring device comprises a grip holder which can preferably be adjusted and locked by an axially guided threaded rod.

  Furthermore, the present invention provides a reinforcing and / or repairing of the structure, characterized in that at least one of the building support components is fitted with a reinforcing device as described above within the scope of the method. Also relates to a method for

  Finally, the invention relates to a reinforcing device as described above for building reinforcement and / or repair, preferably a reinforcing device as described above, for the reinforcement of support components, preferably concrete based structures, in particular bridge structures. .

  In subsequent portions of this specification, preferred forms of the invention will be described in more detail with reference to the exemplary configurations disclosed in FIGS.

  Configuration example

  FIG. 1 illustrates a manufacturing method as well as an example of a reinforcing device according to the present invention. The upper part of FIG. 1 shows a longitudinal section, while the lower part of FIG. 1 shows a transverse section. This form of reinforcement device can preferably be manufactured as described in steps 1-5 of the following method (the metal plate can also be used as an alternative to the fabric insert (1)).

1. Dividing the depth of the thin layer (eg 2-7 parts) to enlarge the surface:
a) To spread a conventional thin layer into a fan shape,
The lamina can be divided in depth into the required number of component lamina using, for example, a heated cutting tool (eg knife or hot wire). This method of spreading into a fan shape is well known (see WO 00/50706 pamphlet), which protects the fibers better than a fan-shaped method for Duroplast thin layers.
The fibers at the end of the thin layer can be released from the matrix by heating. The fibers can then be laid out in the required shape and fused into the grip holder.
b) Another manufacturing method can be performed as follows.
A thin layer is composed of several thin layers (known as tapes). These individual thin tapes are compressed together under heat and pressure to form a single thin layer. A separation foil is inserted into the area of the anchor device during the manufacturing process (individual tapes are not tied within the required area).
The anchor head is made from the tape in the first stage, after which the free running of the tape is simply tied together to form a thin layer after this stage is performed.
The thin layer is preferably provided with a two-way fabric between the tapes extending over the entire depth (see stage 2).

  2. Insertion of a bi-directional fabric which is a thermoplastic matrix and (preferably an aramid fabric with an orientation of +/− 45 °). The fabric is inserted into each first separation layer created.

  3. The cross-section of the anchor device can be enlarged as required by staggering outwardly on a fabric and a thin (about 0.2 mm) thin layer tape.

  4). Heat and pressure are applied to fuse the resulting sandwich-like thin layer structure in the package. This stage may need to be performed in several stages (each in a separate layer).

  At the transition between the thin layer and the head, stresses perpendicular to the longitudinal direction can occur as a result of cross-sectional changes. A suitable device (eg steel and / or carbon fiber profile) can be used to clamp them together by means of screws (3).

  FIG. 2 shows another possible variant according to the invention for end fastening the reinforcing device in the anchor device. The left side of FIG. 2 shows a longitudinal section, while the right side of FIG. 2 shows a transverse section.

  The document European Patent No. 1000208B1 (WO 99/06651) discloses a similar type of configuration for the zigzag configuration of the laminar end shown in FIG. According to a preferred embodiment of the invention, this zigzag configuration is also curved so that the variation of the radius of the thin layer thus created in the anchor device creates a bending radius that matches the tension. This creates a further reduction in the risk of appearance of a “predetermined break point”, as described above, in the region extending into the anchor device.

  Possible manufacturing methods for this preferred form of the invention may be described below. The anchor component can be constructed from conventional plastic materials or metals.

1. Zigzag form:
a) The zigzag shape of the thin layer end portion is first created (eg by heating and compressing in a suitable mold) and subsequently adjusted to the appropriate positive and negative shape.
b) The ends are mounted in a heated concavo-convex mold that forms a thin layer into the required zigzag shape. This form is then left as an anchor component on the lamina.

2. Fixing in form to zigzag laminar end piece Cover mold (made from conventional plastic material or metal) can be glued (B1), screw (B2), or edge surface (B3, eg aramid, Glass, or preferably carbon fiber).

  According to a further preferred configuration, the anchoring device for the reinforcing device as described above may be based on a steel cylinder, as schematically shown in FIG. 3 (the upper region shows a longitudinal section while the lower side The area shows a plan view).

  A possible production method for this preferred form of the invention can be described as follows.

  1. The thin layer must be separated away (or kept separated) so that the thin layer can be wound with such a small radius. This can occur in the same manner for the configuration shown in FIG. 1 (division of the thin layer in the depth direction to enlarge the surface) (see above).

  2. The thin layer structure is wound around a cylinder made of steel or preferably fiber reinforced plastic. To secure, the various individual layers of the thin layer structure can extend through the slots, or these layers can be held mechanically (using cross brackets and screws). The decrease in tension occurs as a result of static friction between the cylinder and the CFK lamina. The surface of the cylinder should therefore preferably be chosen to be as rough as possible.

  3. A compact component is created by heating the head.

  With regard to a more preferred form, it is also possible to wrap each individual layer of the thin-layer structure around a steel or fiber reinforced plastic separating cylinder and thus to build an anchor device based on several cylinders .

It is a figure which shows a manufacturing method simultaneously with the example of the reinforcement apparatus according to this invention. FIG. 6 is a longitudinal and transverse cross-sectional view illustrating another possible variation according to the present invention for end securing a reinforcement device within an anchor device. FIG. 3 shows a longitudinal section of an anchor device for a reinforcing device in the upper region and a plan view in the lower region.

Explanation of symbols

1 Textile insert 3 Screw

Claims (22)

A reinforcing device for supporting a structure,
A thin-layer structure extending into the fixing device, the thin-layer structure comprising a plurality of separate or separable individual layers, with at least an intermediate layer in the region of the fixing device between these layers A reinforcing device comprising the thin layer structure disposed.   The reinforcing device according to claim 1, wherein both end portions of the thin layer structure extend into the fixing device.   The reinforcing device according to claim 1, wherein the thin-layer structure includes a carbon fiber-reinforced plastic thin layer (CFK) as the individual layers.   The reinforcement device according to any one of claims 1 to 3, wherein the individual layers of the thin-layer structure are embedded in a thermoplastic matrix.   5. Reinforcement device according to any one of claims 1 to 4, wherein the individual layers of the laminar structure are based on conventional thermoplastic materials.   Further reinforcing inserts or metal plates are arranged as intermediate layers between individual layers of the laminar structure, preferably bidirectionally oriented reinforcements, in particular bidirectionally oriented aramid fiber reinforcements. The reinforcing device according to any one of claims 1 to 5.   The fixing device includes at least two hollow body portions constituting a hollow body surrounding both ends of the thin layer structure, and preferably at least two hollow body portions are formed by a cylindrical hole penetrating the thin layer structure. 7. Reinforcement device according to any one of the preceding claims, wherein connected and most preferably at least two of the hollow body portions are screwed together.   The fixing device is made of at least an axially adjustable cylinder, preferably a steel cylinder pivotable at least in the axial direction, or most preferably made of a fiber reinforced plastic material, to which a coupling screw is attached. The reinforcing device according to any one of claims 1 to 7.   The reinforcing device according to any one of claims 1 to 8, wherein the fixing device is a chuck head that can be adjusted and locked by a threaded rod guided in an axial direction. A method of making a reinforcing device according to any one of claims 1 to 9,
(A) fanning a conventional thin layer into a plurality of individual layers;
(B) interposing a plurality of intermediate layers between the individual layers made according to step (a);
(C) combining the laminar structures using the effects of heat and / or pressure to create a sandwich package;
(D) attaching the fixing device with a suitable clamping device. A method of making a reinforcing device according to any one of claims 1 to 9,
(A) combining conventional individual layers of conventional thin layer structures with a plurality of conventional intermediate layers to form thin layer structures arranged in an alternating manner;
(B) melting the laminar structure using the effects of heat and / or pressure to create a sandwich package;
(C) completing the fixing device with an appropriate lamp device.   The cross-section of the thin-layer structure in the connection area with the anchor device is increased by arranging further individual layers and / or intermediate layers in the thin-layer structure, the thin layers being preferably in an alternating manner 12. A method of manufacturing a reinforcing device according to claim 10 or claim 11 arranged.   13. A method for manufacturing a reinforcing device according to any one of claims 10 to 12, wherein both ends of the thin-layer structure extend into an anchor device.   14. A method of manufacturing a reinforcing device according to any one of claims 10 to 13, wherein the thin-layer structure comprises carbon fiber reinforced plastic thin layers (CFK) as individual layers.   15. A method of manufacturing a reinforcing device according to any one of claims 10 to 14, wherein individual layers of the thin-layer structure are embedded in a thermoplastic matrix.   16. A method for manufacturing a reinforcing device according to any one of claims 10 to 15, wherein the individual layers of the laminar structure are based on conventional thermoplastic materials.   Further reinforcing inserts or metal plates are arranged as intermediate layers between the individual layers of the thin-layer structure, preferably bidirectionally oriented reinforcements, in particular bidirectionally oriented aramid fiber reinforcements, A method of manufacturing a reinforcing device according to any one of claims 10 to 16.   18. A method of manufacturing a reinforcing device according to any one of claims 10 to 17, wherein the anchor device comprises at least two hollow body portions constituting a hollow body surrounding an end of the laminar structure. .   19. The anchor device according to any of claims 10 to 18, wherein the anchor device comprises at least an axially adjustable steel cylinder, preferably an axially pivotable steel or most preferably a fiber reinforced plastic material cylinder. A method of manufacturing a reinforcing device according to claim 1.   20. A method of making a reinforcing device according to any one of claims 10 to 19, wherein the anchor device comprises a chuck head that can be adjusted and locked by a threaded rod guided in an axial direction.   10. A method for reinforcing and / or repairing a building, wherein a reinforcing device according to any one of claims 1 to 9 is attached to at least one of the building support structures. Use of a reinforcing device according to any one of claims 1 to 9 for reinforcing and / or repairing a building, preferably a support structure element based on concrete, in particular of a bridge structure.

Images