KR20010068751A - Apparatus for reinforcing column and reinforcing method using the same - Google Patents

Abstract

PURPOSE: A column reinforcement and column reinforcing method therewith are provided to keep the effect of reinforcing and to easily reinforce a column again by reinforcing the column with a column reinforcement. CONSTITUTION: Column reinforcements are installed on the lower and upper corners of a column(23). L-shape steels(24) are installed on each corner of the column. Intermediate fixing members are installed in the middle of the L-shape steels. Bolts or connecting PS(Pre-Stressing) wires(25) are installed in the intermediate fixing members. The intensity is maintained by fixing after combining the bolts with nuts or straining the connecting PS steel wires with a jack. Corner reinforcing devices are installed on the column reinforcing devices when a large beam is installed in the highest portion of the column.

Description

Column reinforcement device and column reinforcement method using the same {Apparatus for reinforcing column and reinforcing method using the same}

The present invention relates to a column reinforcing device and a column reinforcing method for reinforcing a column by using a-beam, intermediate fixing end, intermediate sliding end, column upper and lower reinforcement device and column corner reinforcement to the existing column lacking strength. More specifically, to establish a beam at each corner of the existing pillar lacking strength, and to install the upper and lower pillars to the upper and lower parts of the pillar to transmit the celebration of the conveyance to the a beam, the intermediate anchoring end in the middle of the a beam Or installing the intermediate sliding end, and the bolt or PS steel wire is installed on the intermediate fixing end and the intermediate sliding end and then to a column reinforcing device and a column reinforcing method for reinforcing the column by applying a tension force.

When the strength of the pillar becomes insufficient due to various reasons, in order to reinforce the existing pillar having insufficient strength, the conventional steel sheet is wrapped around the existing pillar and welded, and then epoxy resin is applied to the empty space between the existing pillar and the steel sheet. It was common to reinforce the structural strength of pillars by injecting them together and bonding them together.

Such a conventional method has a problem that the reinforcing effect of the pillar is significantly reduced if the existing pillar and the steel sheet are not bonded together to be integral with each other. Since the epoxy resin and the existing pillar are different materials, the impurities on the surface of the pillar and the steel sheet are removed and then the epoxy Resin should be injected, but when the column height is large, there is a problem that workability is poor. In addition, the buckling phenomenon occurs when the steel plate installed on the column is subjected to compressive force, so it is common to put a fixed anchor through the steel plate to prevent this, but this is because the reinforcing member relies on the reinforcing member to reinforce the column. There is a problem of deterioration, and in order to cover the steel plate on the existing column, welding must be performed in the field according to the column shape, so that construction efficiency is lowered, and the air is long and costs are excessively consumed.

The purpose of the present invention is to install a beam to the existing column corner lacking strength, and to reinforce the column by applying a compressive force to the existing column section through the a-beam using a column reinforcement device that can be tensioned and fixed PS wire or bolt Therefore, to provide a column reinforcement device and column reinforcement method without the burden of clean finish of the surface and steel plate of the existing column.

Another object of the present invention is to provide a column reinforcing device and a column reinforcing method in which the reinforcing means does not degrade the reinforcing effect even if the reinforcing material and the material of the column are different from each other because of the mechanical method using the tension force.

Still another object of the present invention is to provide a column reinforcing device and a column reinforcing method that are easy to re-reinforce the column because it is necessary to re-tension the PS steel wire using a hydraulic jack when reinforcement of the column is required.

Another object of the present invention is to install the column upper and lower reinforcing device in the upper and lower four a-beam and to apply the tension force to the column upper and lower reinforcing device to transfer the load through the a-beam, the active column reinforcement without using the reinforcement material It is to provide a column reinforcement device and column reinforcement method possible.

1 is a perspective view of an intermediate fixing stage.

2 is a perspective view of an intermediate sliding end.

Figure 3 is a perspective view of the column up and down reinforcement device.

4 is a perspective view of a column corner reinforcing device.

5A is a plan view of a column reinforced with an intermediate anchoring end and bolts.

5B is a plan view of a column reinforced with an intermediate anchoring stage, an intermediate sliding end, and a PS steel wire.

<Short description of the symbols in the drawings>

1: intermediate fixing stage 2: center sliding stage

3: column reinforcing device 4: column corner reinforcing device

5, 8, 14: support plate 6, 12: fixing block

9, 13: circular sliding block 23: existing column lacking strength

24: A section 25: PS steel wire

26: Bolt

The present invention will be described with reference to the drawings.

The column reinforcing device of the present invention is composed of the intermediate fixing end (1), the intermediate sliding end (2), column up and down reinforcement device (3) and the column corner reinforcement device (4), except for the column corner reinforcement device (4) Are all made of castings.

FIG. 1 is a perspective view of an intermediate fixing stage 1, in which the intermediate fixing stage 1 is composed of a supporting plate 5 and a fixing block 6, and four of the square pillars constitute a pair. The support plate 5 is an angle of a shape, similar to a conventional angle shape. The fixing block 6 is for fixing the bolt or connecting PS steel wire 25, and is integrally formed at the outer edge of the supporting plate 5, and is installed perpendicular to the side end of the supporting plate 5. Two fixing plates 6 'and reinforcing ribs 6 &quot; connecting the upper and lower ends of the two fixing plates 6' horizontally, respectively. The two fixing plates 6 'are formed with holes 7 through which bolts 26 or PS steel wires 25 can be inserted and fixed in the center, respectively.

As shown in Fig. 5A, the four corners of the existing pillar 23 lacking the load capacity are installed with the a-beams from the top to the bottom of the pillars, four intermediate anchoring stages are installed at the corners of the a-beams, and adjacent intermediate anchoring stages are settled. If bolts are installed between the holes 7 formed in the plate and tightened with nuts, or PS steel wires are installed and pulled to fix the load, the load is applied to the center of the column at the intermediate anchoring end, thereby obtaining a reinforcing effect.

Intermediate fixing stage 1 may be installed only one stage in the middle of the column, or may be installed in multiple stages in the middle of the column depending on the state of the existing pillar to be reinforced.

Fig. 2 is a perspective view of the intermediate sliding end 2, in which the intermediate sliding end 2 is composed of a support plate 8 and a circular sliding block 9, which is a modification of the intermediate fixing end 1. The support plate 8 is a-shape like a normal angle shape. The circular sliding block 9 is for supporting the PS steel wire 25, and an arc-shaped steel wire sliding part 9 'formed integrally with the supporting plate at the middle of the outer edge of the supporting plate 8 and the steel wire sliding part. It consists of a steel wire support part 9 "projecting horizontally in the middle of 9 '.

The intermediate sliding end is used to reinforce the column by using the PS steel wire, and installs angles at four corners of the pillars with insufficient strength, and installs an intermediate fixing end (1) at one of the corners of the four angles. In the other three places, the intermediate sliding end 2 is installed, and one end of the PS steel wire 25 is fixed to one side of the intermediate fixing end 1, and the other end of the PS steel wire 25 is three intermediate sliding ends. After the steel wire sliding part 9 'of the end 2 is inserted into the other hole of the intermediate fixing end 1 and the tension is applied by using a hydraulic jack, the tension is transmitted to the column. You can reinforce the column. The steel wire sliding portion 9 'has a circular cross section so that the PS steel wire can be smoothly wound, and the steel wire support part 9' 'prevents the PS steel wire from sliding downward.

5A is a reinforcement of an existing column using four intermediate fixing stages (1) and bolts, and FIG. 5B shows existing PS steel wires installed at one intermediate fixing stage (1) and three intermediate sliding stages (2). It is a reinforced column. When the tension force is applied to the bolt or PS steel wire, the tension force is transmitted to the existing column, thereby reinforcing the column by the effect of tightening the column, and the four a-beams installed at the corners of the pillar serve to add a column section. The celebration of the existing column is transmitted through the pillar up and down reinforcement device described later through the a-beam.

3 is a perspective view of the column up and down reinforcement device, the column up and down reinforcement device (3) is for supporting the upper and lower ends of the a-beam (24) installed at the four corners of the rectangular column 23, the support plate 10 And a reinforcing plate 11, a supporting plate 14, a fixing block 12 and a circular sliding block 13. In the upper and lower ends of the column, the intermediate fixing end (1) or the intermediate sliding end (2) is not used, and instead, the a-beam supporting the a-beam (24) installed at the corner of the pillar is transmitted through the a-beam. Use the column up and down reinforcement (3) that serves to transfer to the bottom.

The celebratory support plate 10 is a plate having a central portion of a fan shape cut into a square, and two cylindrical protrusions 15 having holes 17 protrude from the arc surface.

The reinforcement plate 11 is overlapped on the celebratory support plate in the same shape as the celebratory support plate 10, and has a radius smaller than that of the fan-shaped arc of the celebratory support plate 10, and the arc surface is etched obliquely. do.

The support plate 14 is an angle of a protractor shape vertically formed on the reinforcing plate 11 and is formed above the central cutout of the center side of the reinforcing plate.

The fixing block 12 is composed of a fixing plate 12 ′ and a reinforcing rib 12 ″. The fixing plate is formed in parallel with both sides of the reinforcing plate on the upper side of the reinforcing plate 11, the upper end is inclined inward with an inclination of about 10: 1 in the vertical, and is perpendicular to the support plate 14, respectively. In the center of the support plate, a hole 16 is formed to insert and fix the bolt 26 or the PS steel wire 25.

In addition, to prevent deformation of the fixing plate 12 ′, reinforcing ribs 12 ″ protruding horizontally from upper ends of the two fixing plates are formed. The reinforcing rib 12 ″ has an inclination of about 10: 1 so that the corner side of the support plate 14, which is the central portion, is lowered toward the fixing plates on both the right and left sides in the state where the reinforcing rib 12 ″ is installed on the pillar, Tension is smooth.

The circular sliding block 13 is formed on the reinforcing rib 12 ″ of the fixing block 12 and has an arc shape protruding outwardly from the support plate. The steel wire sliding part 13 'protruding from the round, and the steel wire sliding part 13' so that the PS steel wire 25 does not deviate upward when the PS steel wire 25 is installed in the steel wire sliding part 13 'and the tension wire is applied thereto. It is composed of a steel wire support portion 13 '' which protrudes more horizontally.

Both the fixing block 12 and the circular sliding block 13 are formed in the column upper and lower reinforcing devices 3 so that the connecting PS steel wire 25 is installed in the fixing block 12 or the circular sliding block 13 as necessary. You can apply tension. In the case of using the PS steel wire, the PS steel wire passes through a circular sliding block 13 in three places, and the last both ends of the PS steel wire are fixed to the fixing block 12 so that the PS steel wire can be smoothly fixed without being bent. ') Is formed to be inclined in the vertical plane, the reinforcing rib 12' 'on the fixing plate 12' is formed to be inclined so that the corner side of the support plate, which is the central portion, is lower toward the fixing plate 12 'on both sides.

Column corner reinforcement device 4 is composed of a top plate 18, a vertical reinforcement rib 19 and a central reinforcement rib (22). The pillar up and down reinforcement device 3 of FIG. 3 is installed upside down in the state shown in FIG. 3 at the top of the column 23 of the square section, and the column corner reinforcement device is installed thereon. When a beam having a large width is formed in a lattice at the top of the column, the support plate of the column upper and lower reinforcing devices 3 cannot be brought into close contact with the slab surface under the interference of the beam, thereby reducing the column reinforcing effect. In this case, after installing the column upper and lower reinforcing device (3) only to the bottom of the beam so that the support plate is in close contact with the lower surface of the beam, the column corner reinforcing device (4) to the portion corresponding to the side of the beam Welding and mounting on the apparatus 3 also effectively reinforces the column to which the wide beam is joined.

The upper plate 18 is a fan-shaped plate whose center is cut into a square, and is in close contact with the upper slab surface.

Two vertical reinforcing ribs 19 are formed vertically under the upper plate parallel to the left and right sides of the upper plate 18 and may be formed into the upper plate 18 according to the position of the beam. In addition, a hole 21 is formed in the vertical reinforcing ribs, and the anchor bolts are installed in the beams through the holes to fix and fix the vertical reinforcing ribs 19 to the beams.

The intermediate reinforcing rib 22 is formed vertically below the upper plate, connects between two vertical reinforcing ribs 19, and is manufactured by cutting a steel pipe or a-beam. Intermediate reinforcing rib 22 serves as a pillar for transmitting the celebration from the top to the column upper and lower reinforcing device (3). The height of the vertical reinforcing rib 19 and the intermediate reinforcing rib 22 is adjusted according to the distance from the bottom of the beam to the bottom of the slab. Since the pillar corner reinforcement device requires a variety of forms depending on the state of the column and beam, it is manufactured by welding in the field without the casting.

The method of reinforcing the column using the column reinforcing device of the present invention comprises the steps of installing four a-beams 24 at the corners of the pillars 23 of the rectangular section having insufficient strength, and the pillars at the lower end and the upper end of the pillar 23. Installing the upper and lower reinforcing device (3), the step of installing a bolt or PS steel wire to the column upper and lower reinforcing device (3), the step of introducing and fixing the tension force to the bolt or PS steel wire, the a-beam (24) Installing four intermediate fixing stages or one intermediate fixing stage and three intermediate sliding stages at a corner of the step; installing a bolt or connecting PS steel wire 25 between the intermediate fixing stages or the intermediate sliding stages, the bolt or It consists of a step of introducing the tension after the introduction of the tension force to the PS steel wire (25).

If the work space is narrow and cannot be installed by carrying the a-beams 24 installed at the corners of the pillars, the a-beams are cut and installed before welding. In addition, if a wide beam is formed at the upper end of the column and the column up and down reinforcement device 3 cannot be installed to the lower surface of the slab, the column up and down reinforcement device 3 is first installed at the bottom of the beam, and then the column corner reinforcement device (4). ) Is installed by welding on the column up and down reinforcing device (3).

Intermediate anchoring stages or intermediate sliding stages may be provided with only one stage in the center of the pillar, or may be provided with multiple stages in the middle depending on the length of the pillar. In case of using four intermediate fixing stages, four connection PS steel wires (25) must be used to reinforce the column, so the tension work has to be done several times, but when using one intermediate fixing stage and three intermediate sliding stages in combination In one tension work, the column can be reinforced.

The column reinforcing device of the present invention is to reinforce the pillar lacking strength, so that the reinforcement by a mechanical method using a torque wrench or a hydraulic jack should cleanly finish the surface of the pillar and the iron plate to be reinforced in the existing steel plate and epoxy reinforcement method Since there is no burden to do, the workability is excellent and the work process can be shortened. In addition, the column reinforcement effect does not fall even if the material is different from the column, and re-reinforcement is easy even if the tension drops over time.

In the column section where compressive force and bending moment are applied, the greatest stress is the corner of the column. Therefore, a mechanical method is used instead of conventional epoxy resin filling or anchor bolting by placing a beam at the corner of the column and joining it with a column with insufficient strength. The axial strength of the cross section of the column increases because of the force applied to it.

In addition, the load bearing plate is attached to the upper and lower ends of the a-beams added to the existing pillars having insufficient strength to induce a smooth transmission during the column celebration. In addition, since the reinforcement method of the present invention most of the processes are prefabricated, the overhead cost such as operating loss that is a problem during reinforcement construction is hardly generated.

Claims (6)

A-shaped support plate 5; And, Two fixing plates 6 ″ which are integrally formed with the supporting plate in the middle of the outer corner of the supporting plate 5, protrude vertically from the side end of the supporting plate 5, and have a hole 7 in the center; A fixing block 6 composed of fixing ribs 6 'connecting horizontally between upper and lower ends of the two fixing plates 6' '; Intermediate settling end, characterized in that consisting of. A-shaped support plate 8; And, It is formed integrally with the support plate 8 in the middle of the outer corner of the support plate 8, the middle of the arc-shaped steel wire sliding portion 9 'and the steel wire sliding portion 9' protruding out of the support plate. Circular fixing block (9) consisting of a steel wire support (9 '') protruding horizontally from the; Middle sliding step, characterized in that consisting of. A central supporter having a fan shape cut into a square, and two semicircular protrusions 15 formed with holes 17 protruding from an arc portion; The center portion is cut in the same square as the celebratory support plate 10, the reinforcement plate (11) which is installed on the celebratory support plate 10 in a fan shape having a smaller radius than the celebratory support plate (10); An a-shaped support plate 14 vertically formed on the rectangular cutout of the reinforcing plate 11; Two fixing plates 12 'formed on the reinforcing plate 11 so as to be inclined inward in a state parallel to both sides of the reinforcing plate and horizontally protruding from the fixing plate 12' A fixing block 12 made of a reinforcing rib 12 ″ having an inclination of about 10: 1 so that the corner of the support plate 14 is higher and lower toward the left and right fixing plates; And, The steel wire sliding portion 13 'and the steel wire sliding portion 13' protruding outwardly of the support plate upwards from the fixing block 12 and horizontally protruding more than the steel wire sliding portion 13 'from the upper end of the steel wire sliding portion 13'. A circular sliding block 13 composed of a steel wire support portion 13 ″; Column up and down reinforcement device, characterized in that consisting of. A top plate 18 having a fan shape and a central portion thereof cut in a square; Vertical reinforcing ribs 19 protruding downward from the left and right sides of the upper plate 18 and having holes 21 formed in the middle thereof; And, A central reinforcing rib 22 formed vertically below the upper plate 18 and connecting two vertical reinforcing ribs 19; Column corner reinforcement device, characterized in that consisting of. Installing the column upper and lower reinforcement device (3) of the lower end and the upper end corner of the column 23 lacking strength; Installing the a-beams 24 at corners of the pillars 23; Installing the intermediate fixing end of claim 1 in the middle of the a-beams 24, or installing the intermediate fixing end in one place, and installing the intermediate sliding end of the second in the second place; Installing a bolt or connecting PS steel wire (25) at the intermediate fixing end or intermediate sliding end; And, Fastening the nut to the bolt or tensioning the connecting PS steel wire 25 using a jack to maintain the tension force; How to reinforce the column using a column reinforcing device, characterized in that consisting of. The method according to claim 5, wherein when the wide beam is formed at the uppermost end of the pillar, the method further comprises the step of installing the maneuvering corner reinforcing device of claim 4 on the upper and lower pillar reinforcing device installed on the upper end of the column (23). How to reinforce the column using a column reinforcing device characterized in that.