TWI553200B - Reinforcement method of reinforced anchor and concrete column - Google Patents

Description

Reinforced anchor bolt and concrete column reinforcement method

The disclosure relates to a method for reinforcing a reinforcing anchor and a concrete column.

In recent years, major earthquakes have been frequently launched. In 1995, the Great Hanshin Earthquake occurred in Japan. In 1999, there was a 921 episode in Taiwan, a tsunami in South Asia in 2004, a Wenchuan earthquake in mainland China in 2008, a Haiti earthquake in 2010, and Miyagi in Japan in 2011. In the Great Earthquake, the scale of the earthquake is more than 7 and the number of casualties is tens of thousands. The natural disaster of the earthquake is the biggest disaster for mankind in the 21st century.

The early human settlements were mainly able to cover the wind and cover the rain. The requirements for earthquake prevention are very few. With the development of science and technology and the protection of personal safety, the construction of buildings has gradually met the requirements of earthquake and earthquake resistance, in the hope that the earthquake will occur. It can reduce damage and loss to human life and property. After the Great Hanshin Earthquake in Japan, Japan’s earthquake-resistant requirements for buildings were greatly improved. After the 921 Jiji Earthquake, Taiwan began to apply earthquake-resistant reinforcement to buildings with insufficient earthquake resistance. Today’s Taiwan’s annual public works for earthquake-resistant reinforcement More than a thousand pieces have been added. Therefore, regardless of the increase in the seismic resistance of public works or private buildings, it is already an important policy policy of the government.

The building was built with materials such as stones, bricks and wood. The industrial structure was mostly based on Reinforced Concrete (RC). The early building codes did not consider seismic design, plus construction quality. Unsatisfactory and windy rains over the years, and the aging, deteriorating or capping of structural materials, etc., lead to more than the original design. Old buildings are often collapsed, collapsed, destroyed, etc. due to insufficient earthquake resistance during earthquakes. Therefore, regardless of whether the building is old, cracked or poorly designed, it should be removed or reinforced when its seismic resistance is insufficient. Demolition and reconstruction are related to the value of funds or the preservation of monuments. It is not necessary to use dismantling and reconstruction as a means to enhance the resilience of earthquakes.

In the Taiwan earthquake-resistant design code, the statement of the earthquake-resistant reinforcement of the building is clearly stated. “When the existing buildings are evaluated and it is necessary to improve their seismic capacity, seismic strengthening techniques should be applied and appropriate improvement measures should be taken to improve the safety of the building”. "The earthquake-resistant reinforcement should be carried out according to its reinforcement target, by improving the structural system and increasing the structural toughness and strength." Whether the earthquake resistance of buildings is insufficient, national laws and regulations have certain evaluation criteria. The seismic evaluation of reinforced concrete structures is often evaluated by the structural defects of the exposed structures, including whether there are cracks in the reinforced concrete members, and the cracks represent the quality of concrete. Poor or insufficient strength, after the crack is generated, the steel bars will corrode and reduce the strength of the structural material. If the structural material has water seepage, the corrosion of the steel bar and the aging of the concrete will accelerate.

Reinforcement of structural components of buildings generally refers to the reinforcement of members such as beams, columns, walls and slabs (bridge decks) of buildings. The reinforcement of these components is mainly for the load overload of buildings, external forces or earthquakes, etc. Reinforcement of damage modes such as shear, bending moment and toughness. Among the structural reinforcement methods currently widely used and proven to be effective, the reinforcement method of steel sheets, the reinforcement method of fiber composites, and the reinforcement method of reinforcement and concrete thickening. Among them, the steel plate reinforcement method is the most common method. The reinforcement method of fiber composites has been welcomed by the market because it has the advantages of the steel plate reinforcement method. It also attracts a large number of scholars to invest in research. These two methods are outlined later.

1 and 2 illustrate a conventional steel plate reinforcement method. The steel plate reinforcement of the column refers to the reinforcement method of the column steel plate (belt). The steel plate has high stiffness, tensile strength and ductility, and has good effects on the shear reinforcement and toughness reinforcement of the column. The construction procedure for the reinforcement method widely used is as follows: Construction method of steel plate reinforcement cylinder:

1. Clean the surface of the RC concrete column 11: including paint, pollution and debris removal;

2. Column repair: the column has cracks or defects, and the epoxy resin 13 is used for filling and repairing. If the steel bar is exposed, the rusted part shall be cleaned by the surface, and then filled with epoxy resin to fill the cover;

3. After measuring according to the dimensions of the column, the steel plate is ordered according to the thickness of the reinforcing design and formed into a steel jacket 15, usually a two-piece jacket;

4. The two pieces of the jacket are bolted to the periphery of the cylinder, and then the two steel plates are welded to the welded portion 17 by welding.

5. Maintenance engineering;

6. Surface protection and decoration works can be painted or decorated according to requirements.

The present disclosure provides a reinforcing anchor, comprising a rod body comprising a fiber composite material; and a sash portion disposed on a side of the body, the stalk portion comprising a fiber composite material.

The present disclosure provides a method for reinforcing a concrete column, which comprises covering the concrete column with at least one reinforcing jacket, wherein the reinforcing jacket comprises a fiber composite impregnated with resin: forming a plurality of drill holes extending through the reinforcing jacket a lap joint and deep into the concrete column; disposed in the borehole, wherein the reinforcement anchor includes a rod body and a sling portion, the rod body is disposed in the borehole and includes impregnated resin The fiber composite material is disposed on a side of the rod body and includes a fiber composite material not impregnated with the resin: and the fiber composite material of the sash portion is applied to the overlapping portion of the reinforcing jacket by using a resin.

The technical features and advantages of the present disclosure have been broadly described above, and the detailed description of the present disclosure will be better understood. Other technical features and advantages of the subject matter of the claims of the present disclosure will be described below. It is to be understood by those of ordinary skill in the art that the present invention may be <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; It is to be understood by those of ordinary skill in the art that this invention is not limited to the scope of the present disclosure as defined by the appended claims.

Figure 3 illustrates a flow chart of reinforcement of a concrete column 70 in accordance with one embodiment of the present invention. 4 to 7 illustrate a method of preparing the reinforcing jacket 20 of an example of the present invention. In one embodiment of the invention, the preparation of the reinforcing jacket 20 includes the following steps:

1. The unidirectional fiber fabric 21 is cut according to the desired size and the number of layers of the laminate;

2. Mix epoxy resin 23 (A and B agents are mixed in proportion) and stir well;

3. The unidirectional fiber fabric 21 is fully impregnated with the resin;

4. The mold 21 made of steel plate is prepared in advance, and the unidirectional fiber fabric 2123 impregnated with the resin is applied to the mold 25 according to the required number of layers;

5. Winding and fixing with a shrinkable and compressible belt so that the unidirectional fiber fabric 21 and the resin 23 are sufficiently joined uniformly, and excess resin and air are discharged;

6. Place the room temperature for 12~24 hours, or put it in the oven and bake at 130 °C for 90 minutes to harden the reaction resin;

7. After the resin hardening reaction is completed, the belt and the mold are removed to form a fiber composite jacket 20 which can be used for vibration-resistant reinforcement.

If the reinforcement is a circular cylinder, the reinforcement jacket can be made into two semi-circular sub-jackets (two-piece jacket) or one-piece jacket; if the reinforcement is a rectangular cylinder, it must be made into two A set of ㄇ-shaped jackets. The length of the lap portion of the reinforcing jacket is prepared, and the length of the lap portion is about 10% to 30% of the circumference of the circular cylinder; the rectangular cylinder is 10% to 30% of the length of the lap joint.

8 and 12 illustrate a method of preparing a reinforcing anchor 30 according to an example of the present invention. In one embodiment of the invention, the preparation of the reinforcing anchor 30 includes cutting the fiber pre-knit (carbon fiber, glass fiber, Kevlar or Twaron) 31 to about 16-50 cm (2 m outer diameter of the cylinder) and forming the rod 33. (about 8-30cm) and Liusu 35 (8-20cm), of which the Liusu 35 can be a two-piece 180° expansion (Fig. 10), a 120-degree expansion (Figure 11) or 90 The four-piece expansion (Figure 12).

13 to 16 illustrate a reinforcing method of a concrete column 70 according to an embodiment of the present invention. In an embodiment of the present invention, the reinforcement method of the concrete column (cylinder) 70 is firstly prepared for construction (the inspection of the site site, the measurement and customization of the jacket size and the preparation of the material) and the repairing project (the RC concrete) The surface of the column is cleaned, dust-removed, crack-filled, lacquered, etc., and the surface is smoothed.

Thereafter, the surface of the cylinder is coated with an epoxy resin having a thickness of about 0.1 mm to 0.4 mm, wherein the epoxy glass has a translocation temperature (Tg) of 50 ° C to 100 ° C and a viscosity of 50,000 to 150,000 cps (PCT). Park centipoises). Next, the reinforcing jacket 20 is covered with the concrete column 70, and the reinforcing jacket 20 is fixed to the both sides from the center by the belt. After 24 hours of curing, the belt is removed and the jacketing process can be completed. After completing the process of covering the jacket, a plurality of drilled holes 71 are formed which extend through one of the lap portions 27 of the reinforcing jacket 20 and into the concrete column 70 as shown in FIG.

Referring to Figures 14 and 15, the rod 33 of the reinforcing anchor 30 is impregnated with epoxy resin or acrylic resin and placed in the bore 71, and then inserted into the rod 30 by the bolt 37 to make the fiber of the rod 30 The epoxy bonds are tightly bonded and have a good interface between the epoxy resin and the concrete column 70. Due to the force of the insertion of the pin 37, the epoxy resin in the bore 71 is forced to be discharged, which can be used to infiltrate the fibers of the squirting portion 35, and when insufficient, the epoxy resin is filled up, so that the squid portion 35 is fully infiltrated with the resin, and The affixing portion 27 of the reinforcing jacket 20 is attached. After that, after standing for 12-24 hours, the seismic strengthening project of the reinforcing jacket 20 and the reinforcing anchor 20 can be completed, as shown in FIG.

In one embodiment of the present invention, the shaft 33 of the reinforcing anchor 30 is hollow cylindrical, the bolt 37 is a hollow smooth cylinder, and the hollow design facilitates the discharge of the air of the bore 71. In an embodiment of the invention, the pin 37 is a metal tube such as an aluminum tube, an iron tube or a steel tube. In one embodiment of the invention, the pin 37 comprises a fiber composite material such as carbon fiber, fiberglass, Kevlar or Twaron.

Figure 17 illustrates a method of reinforcing a concrete column 80 in accordance with another embodiment of the present invention. 13 to 16 illustrate the reinforcing manner of the concrete cylinder 70, and FIG. 17 illustrates the seismic strengthening of the concrete rectangular column 80. The reinforcing anchors 30 are respectively disposed on the four sides of the concrete rectangular column 80, and the reinforcing jacket 20 is tightly closed. It is fixed on the concrete rectangular column 80.

The technical content and the technical features of the present disclosure have been disclosed as above, but it should be understood by those skilled in the art that the disclosure and disclosure of the present disclosure should be made without departing from the spirit and scope of the disclosure as defined by the appended claims. Can be used for various substitutions and modifications. For example, many of the processes disclosed above may be implemented in different ways or in other processes, or a combination of the two.

Moreover, the scope of the present invention is not limited to the particular process, machine, manufacture, composition, means, method or method of the particular embodiments disclosed. It should be understood by those of ordinary skill in the art that, in light of the teachings of the present disclosure, the process, the machine, the manufacture, the composition of the material, the device, the method, or the steps, whether present or future developers, The revealer performs substantially the same function in substantially the same manner, and achieves substantially the same result, and can also be used in the present disclosure. Accordingly, the scope of the following claims is intended to cover such <RTIgt; </ RTI> processes, machines, manufactures, compositions, devices, methods or steps.

11. . . Concrete column

13. . . Resin

15. . . Steel jacket

17. . . Welding department

20. . . Reinforcement jacket

twenty one. . . Unidirectional fiber fabric

twenty three. . . Resin

25. . . Mold

27. . . Lap

30. . . Reinforced anchor

31. . . Fiber pre-knit

33. . . Rod body

35. . . Liu Su

37. . . plug

70‧‧‧ concrete column

71‧‧‧Drilling

80‧‧‧ concrete column

The technical features and advantages of the present disclosure are fully understood by reference to the foregoing description and the accompanying drawings.

1 and 2 illustrate a conventional steel plate reinforcement method;

3 is a flow chart showing the reinforcement of a concrete column according to an embodiment of the present invention;

4 to 7 illustrate a method of preparing a reinforcing jacket according to an example of the present invention;

8 to 12 illustrate a method of preparing a reinforcing anchor according to an example of the present invention;

13 to 16 illustrate a reinforcing method of a concrete column according to an embodiment of the present invention;

Figure 17 illustrates a method of reinforcing a concrete column according to another embodiment of the present invention.

11‧‧‧ concrete column

13‧‧‧Resin

15‧‧‧Steel jacket

Claims (9)

A reinforcing anchor bolt comprises: a rod body having a hollow cylindrical shape; a stalk portion disposed on a side of the body; and a bolt disposed in the rod body, wherein the bolt body is hollow Cylindrical. The reinforcing anchor according to claim 1, wherein the plug is an aluminum tube, an iron tube or a steel tube. The reinforcing anchor of claim 1, wherein the plug comprises a fiber composite. A reinforcing method for a concrete column, comprising the steps of: coating the concrete column with at least one reinforcing jacket; forming a plurality of drilling holes penetrating through one of the reinforcing jackets and deepening the concrete column; Anchoring the anchor hole, wherein the reinforcing anchor includes a rod body and a stalk portion, the rod body is disposed in the drilling hole, the rod system is hollow cylindrical shape, and is inserted into the drilling hole by using a bolt In the rod body, the plug is in a hollow cylindrical shape; and the sling portion is attached to the overlapping portion of the reinforcing jacket by using a resin. The method for reinforcing a concrete column according to claim 4, further comprising the step of coating a resin on the surface of the concrete column. The method for reinforcing a concrete column according to claim 4, wherein the resin comprises an epoxy resin or an acrylic resin, the viscosity is between 50,000 and 150,000 cps, and the glass transition temperature is between 50 and 100 ° C. . A reinforcing method for a concrete column according to claim 4, wherein the inserting method The pin is made of aluminum tube, iron tube or steel tube. The method for reinforcing a concrete column according to claim 4, wherein the plug comprises a fiber composite material. The method for reinforcing a concrete column according to claim 8, wherein the fiber composite material comprises carbon fiber, glass fiber, Kevlar or Twaron.