KR102626949B1 - Twist Method Of Steel Structures Using Jigs - Google Patents

Abstract

The twisting method of a steel structure using a jig according to an embodiment of the present invention includes a first step of providing a preassembled steel structure; A second step of mounting the steel structure using a plurality of jigs; A third step of pressing the upper surface of the steel structure so that the lower surface and both sides of the steel structure are in close contact with the fixing groove of the jig; and a fourth step of twisting the steel structure by pressing the jig so that the lower surface of the jig is parallel to the ground.

Description

Twist Method Of Steel Structures Using Jigs}

The present invention relates to a twisting method of a steel structure, and more specifically, to a method of twisting a pre-assembled steel structure using a jig.

Recently, as the design trend in architectural design has rapidly changed from formal buildings to buildings with irregular, free forms, irregular buildings are frequently being adopted as the design of symbolic buildings (landmarks) such as city hall, museums, stadiums, etc. In order to construct such an irregular building, steel frames such as metal square pipes or C-beams must be made into an irregular shape.

In particular, in order to create a naturally curved surface like the façade of the Busan Opera House, a construction method that involves twisting the entire steel frame in a spiral shape is necessary. The conventional technology had a problem in that the cross section of the steel frame was deformed or the steel frame itself was destroyed during the twisting process. In addition, in the conventional method, an attempt was made to twist the steel frames separately and then join them, but the twist angles of the steel frames were different, making joining difficult. Meanwhile, mass production of twisted steel structures is impossible due to the absence of devices or facilities that can consistently twist steel structures under the same conditions.

Therefore, there is a need for a twisting method that allows mass production under certain conditions without damaging the steel frame.

Republic of Korea Patent No. 10-1897714 Steel structure twist construction method of irregular building structure {Steel structure of irregular building structure Twist construction method} Republic of Korea Patent No. 10-1184277 Steel frame for the construction of irregular concrete structures and method of constructing irregular concrete structures using the same {Steel frame for free form concrete structure construction and method using it}

Embodiments of the present invention were developed to solve the above problems, and provide a twisting method for a steel structure using a jig that can twist the steel frame without damaging the cross section of the steel frame or the steel frame itself.

In addition, a twisting method of a steel structure using a jig is provided so that the twisted steel structure has a continuous twist angle.

In addition, a twisting method for steel structures using a jig that can mass-produce twisted steel structures is provided.

Embodiments of the present invention, in order to solve the above problems, include a first step of providing a pre-assembled steel structure; A second step of mounting the steel structure using a plurality of jigs; A third step of pressing the upper surface of the steel structure so that the lower surface and both sides of the steel structure are in close contact with the fixing groove of the jig; and a fourth step of twisting the steel structure by pressing the jig so that the lower surface of the jig is parallel to the ground.

In addition, the jig includes a fixing part in which the bottom surface and the inner surface of the fixing groove are formed at right angles to each other; and a support part coupled to the bottom of the fixing part so that the fixing part is perpendicular to the ground.

It is preferable that the width of the fixing groove is the same as the width of the steel structure.

The jig is arranged to be spaced apart in the direction in which the steel structure extends, and the angle formed between the bottom surface of the fixing groove and the ground is preferably set differently depending on the position where the jig is placed.

In the third step, it is preferable that the position of the jig is not restricted in the height direction.

The steel structure includes a pair of first assembly plates on both sides of which temporary assembly keys are formed to protrude at regular intervals along the extension direction of the steel structure; and a pair of second assembly plates on both sides of which key grooves for engaging the provisional assembly key are formed. It is preferable that the second assembly plate is formed by being provisionally assembled perpendicular to each other.

According to the problem solving means of the present invention as discussed above, various effects including the following can be expected. However, the present invention does not require all of the following effects to be achieved.

The twisting method of a steel structure using a jig according to an embodiment of the present invention can twist the steel frame without damaging the cross section of the steel frame or the steel frame itself.

In addition, the twisting method of a steel structure using a jig according to an embodiment of the present invention can enable the twisted steel structure to have a continuous twist angle.

In addition, the twisting method of a steel structure using a jig according to an embodiment of the present invention enables mass production of twisted steel structures and can be produced at a low cost, thereby improving productivity.

Figure 1 is a schematic diagram of a steel structure twisted using a jig according to an embodiment of the present invention.
FIG. 2 is a view comparing the shape of the steel structure of FIG. 1 before twisting and the shape after twisting.
Figure 3 is a diagram showing the pre-assembled structure of the steel structure of Figure 1.
Figure 4 is a diagram showing the process in which a steel structure is twisted by a jig.
Figure 5 is a perspective view showing the structure of the jig of Figure 1.
Figure 6 is a view showing one side of the jig at each position in Figure 1.

In order to fully understand the configuration and effects of the present disclosure, preferred embodiments of the present disclosure will be described with reference to the attached drawings. However, the present disclosure is not limited to the embodiments disclosed below, and may be implemented in various forms and various changes may be made. Hereinafter, in describing the present invention, if it is determined that related known functions may unnecessarily obscure the gist of the present invention as they are obvious to those skilled in the art, the detailed description thereof will be omitted.

Terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms may be used only for the purpose of distinguishing one component from another. For example, a first component may be referred to as a second component, and similarly, the second component may be referred to as a first component without departing from the scope of the present disclosure.

In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

The terms used in this application are merely used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. Unless otherwise defined, terms used in the embodiments of the present disclosure may be interpreted as meanings commonly known to those skilled in the art.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

Figure 1 is a schematic diagram of a steel structure 100 twisted using a jig 200 according to an embodiment of the present invention, and Figure 2 is a shape of the steel structure 100 of Figure 1 before twisting according to the present invention. This is a drawing comparing the shape after twisting. In the present invention, the spiral steel structure 100 can be formed by twisting both ends of the steel structure 100. To this end, the present invention may include first to fourth steps.

The first step is to provide a pre-assembled steel structure 100. In one embodiment, the steel structure 100 may be curved and extended in any one direction. In another embodiment, the steel structure 100 may extend in a straight line.

FIG. 4 is a diagram showing the pre-assembled structure of the steel structure 100 of FIG. 1. Referring to FIG. 4, the steel structure 100 may include a pair of first assembly plates 110, a pair of second assembly plates 120, a reinforcement plate 130, etc. In one embodiment, the steel structure 100 may be formed by temporarily assembling the first assembly plate 110 and the second assembly plate 120 perpendicular to each other. At this time, the steel structure 100 may be provisionally assembled to have a hollow square cross-section from one end to the other end. In the first step, the steel structure 100 is preferably not welded (non-welded).

A pair of first assembly plates 110 are arranged opposite each other and extend from one end to the other end. In one embodiment, temporary assembly keys 111 may be formed to protrude on both sides of the first assembly plate 110 at regular intervals along the extension direction of the steel structure 100. At this time, it is preferable that the height of the temporary assembly key 111 is equal to or smaller than the thickness of the second assembly plate 120.

Meanwhile, key grooves 121 in which the temporary assembly key 111 is accommodated may be formed on both sides of the second assembly plate 120. At this time, the keyway 121 may be formed in a shape corresponding to the shape of the temporary assembly key 111. A temporary assembly key 111 is inserted and received in the key groove 121. The keyway 121 is longer than the temporary assembly key 111 to enable fine movement due to slip between the first assembly plate 110 and the second assembly plate 120 during the twisting process of the steel structure 100. It is desirable to form it large.

In one embodiment, the reinforcement plate 130 is installed inside the steel structure 100. Reinforcement plates 130 may be installed at regular intervals along the extension direction of the steel structure 100. In one embodiment, the reinforcement plate 130 may be combined with the first assembly plate 110 and/or the second assembly plate 120. Additionally, the side surface of the reinforcement plate 130 may be in contact with the first assembly plate 110 and/or the second assembly plate 120.

In one embodiment, an external force distribution hole 131 may be formed in the center of the reinforcement plate 130 to distribute the external force applied to the steel structure 100. The reinforcement plate 130 can prevent deformation or damage of the steel structure 100 through the external force distribution hole 131. In addition, the reinforcement plate 130 allows the longitudinal cross-section of the steel structure 100 to remain the same as its original shape even after the twisting process. Meanwhile, in one embodiment, the external force distribution hole 131 is preferably formed in a circular shape.

In the second step, the steel structure 100 is mounted using a plurality of jigs 200. In one embodiment, the jigs 200 may be arranged to be spaced apart in the direction in which the steel structure 100 extends. Specifically, the jig 200 may be arranged to mount and fix one end (a-a'), a middle (b-b'), and the other end (c-c') of the steel structure 100. For this purpose, it is preferable that the number of jigs 200 is at least three.

Figure 4 is a perspective view showing the structure of the jig 200 of Figure 1. Referring to FIG. 4, the jig 200 may include a fixing part 210, a bracket part 200, a support part 230, a connecting part 240, etc.

The jig 200 may include at least one fixing part 210. In particular, the jig 200 disposed at one end or the other end of the steel structure 100 may include at least two fixing parts 210. At this time, the fixing part 210 is formed in a plate shape and may be arranged perpendicular to the direction in which the steel structure 100 extends.

In one embodiment, a fixing groove 211 may be formed in the fixing part 210 to face the outer surface of the steel structure 100 and fix the steel structure 100. At this time, the angle formed by the bottom surface and the inner surface of the fixing groove 211 may be the same as the angle formed by the bottom surface and the side surface of the steel structure 100. In one embodiment, the angle formed between the bottom surface and the inner surface of the fixing groove 211 is preferably a right angle.

FIG. 5 is a diagram sequentially showing the process in which the steel structure 100 of FIG. 1 is twisted by the jig 200. In particular, Figure 5 shows the process in which the steel structure 100 is twisted by the jig 200 at one end (a-a'), middle (b-b'), and other end (c-c') points of Figure 1. . Referring to FIG. 5(a), the fixing part 210 allows the steel structure 100 to be seated on the upper part of the fixing groove 211. For this purpose, a guide inclined surface that guides the steel structure 100 may be formed on the fixing part 210.

The steel structure 100 may be seated on a guide inclined surface. In one embodiment, the guide inclined surface may include a first guide inclined surface 212 and a second guide inclined surface 213. The first guide inclined surface 212 is an inclined surface that connects an inner surface of the fixing groove 211 with the upper surface of the fixing part 210. On the other hand, the second guide inclined surface 213 is an inclined surface that connects the remaining inner surface of the fixing groove 211 and the upper surface of the fixing part 210. Here, the slopes of the first guide slope 212 and the second guide slope 213 with the ground may be set differently. Meanwhile, the first guide inclined surface 212 and the second guide inclined surface 213 may have different inclines with the ground depending on the position of the fixing groove 211.

The third step is to press the upper surface of the steel structure 100 so that the lower surface and both sides of the steel structure 100 are in close contact with the fixing groove 211 of the jig 200. At this time, the steel structure 100 may be pressurized using a hydraulic device. Referring to FIG. 5(a), the pressed position of the steel structure 100 may be set differently depending on the angle of the bottom surface of the fixing groove 211.

In one embodiment, the angle between the bottom surface of the fixing groove 211 and the ground may be set differently depending on where the jig 200 is placed. FIG. 6 is a view showing one side of the jig 200 at each position in FIG. 1. Figures 6(a) and 6(c) are cross-sections of the jig 200 at one end (a-a') and the other end (c-c') of Figure 1, and Figure 6(b) is a cross-section of the jig 200 in Figure 1. This is a cross section of the jig 200 at the middle (b-b') point of .

Referring to FIG. 6, the bottom surface of the fixing groove 211 at the middle (b-b') point of the steel structure 100 may be parallel to the ground. Meanwhile, the angle formed between the bottom surface of the fixing groove 211 and the ground increases from the middle point (b-b') of the steel structure 100 to one end (a-a') and/or the other end (c-c'). It can increase. At this time, in the case of the jig 200 disposed at both ends, the angle formed between the bottom surface of the fixing groove 211 and the ground is equal to the maximum angle at which the steel structure 100 can be twisted.

Meanwhile, the fixing groove 211 may be formed in the same shape as the longitudinal cross-section of the steel structure 100. In one embodiment, the fixing groove 211 may be formed in the shape of a square groove. At this time, the width of the fixing groove 211 is preferably the same as the width of the steel structure 100.

In the third step, the steel structure 100 is gradually pressurized for a preset time, thereby minimizing deformation due to pressurization. At this time, the steel structure 100 may slide inward along the guide inclined surface while being pressed.

At this time, the position of the jig 200 is not particularly restricted in the height direction. Therefore, while the steel structure 100 is in close contact with the fixing groove 211, the support portion 230 of the jig 200 can be lifted. For example, one side of the jig 200 may be lifted at one end (a-a') and the other end (c-c') as shown in FIG. 5(b). At this time, the lower surface of the steel structure 100 is preferably parallel to the ground.

In the third step, the bracket portion 200 can prevent the fixing groove 211 from opening to both sides. In one embodiment, the bracket portion 200 may be coupled to the upper end of the fixing portion 210 when mounting of the steel structure 100 is completed. At this time, the bracket part 200 has a plate shape, and coupling holes are formed on both sides of the bracket part 200. Specifically, the bracket part 200 may be fastened to the upper part of the fixing part 210 separated based on the fixing groove 211 through a coupling hole. In addition, the bracket unit 200 allows maintaining the gap between the fixing parts 210 when two fixing parts 210 are arranged in one jig 200.

The support portion 230 is formed in a plate shape and may be coupled to the lower end of the fixing portion 210 so that the fixing portion 210 is perpendicular to the ground. At this time, the support portion 230 and the fixing portion 210 may be coupled by the connection portion 240. In one embodiment, a cross groove may be formed on the upper end of the connecting portion 240 to intersect and engage with the assembly groove formed in the fixing portion 210. Meanwhile, an insertion groove is formed at the bottom of the connection part 240 so that it can be coupled to a part of the support part 230.

In the fourth step, the jig 200 is pressed so that the lower surface of the jig 200 is horizontal, and the steel structure 100 is twisted. Referring to Figure 6(b), the lifted side of the pedestal 230 is pressed. At this time, the jig 200 may be pressurized using a hydraulic device. The support portion 230 is gradually pressurized so that it is level with the ground or in contact with the ground as shown in FIG. 6(c). At this time, the jig 200 is restrained from moving back and forth or left and right.

As the support portion 230 descends, the steel structure 100 fixed to the fixing groove 211 is twisted. At this time, the steel structure 100 may be twisted to the side where the jig 200 that fixes the steel structure 100 is pressed. For example, in Figure 5(b), the upper right surface of the support portion 230 is pressed at one end (a-a'). As the support portion 230 is pressed, the steel structure 100 at that point may be twisted clockwise. On the other hand, the left upper surface of the support portion 230 is pressed at the other end (c-c') point. At this time, the steel structure 100 at the corresponding point may be twisted counterclockwise.

Meanwhile, in the fourth step, the support portion 230 at the middle (b-b') point is not pressed. In one embodiment, the support portion 230 at point b-b' is preferably fixed to the ground so that both ends of the steel structure 100 can be twisted.

In the fourth step, the temporary assembly key 111 may slip slightly within the keyway 121 as the steel structure 100 is twisted. Flexibility can be imparted to the steel structure 100 through this pre-assembled structure. This allows the steel structure 100 to be easily twisted and prevents the jig 200 from being damaged by the steel structure 100 or the resistance of the steel structure 100 during the twisting process.

As a result, the steel structure 100 is gradually twisted in the direction of pressing the support portion 230, and may have a spiral structure that is continuously twisted from one end to the other end. At this time, one longitudinal cross-section of the twisted steel structure 100 always has the same hollow rectangular cross-section.

When the fourth step is completed, some of the parts where the first assembly plate 110 and the second assembly plate 120 are joined are tack-welded, so that the steel structure 100 maintains its twisted form even after removing the jig 200. make it possible Next, when the jig 200 is removed, the steel structure 100 undergoes a main welding process using a laser. At this time, it is preferable that the main welding is performed on the portion where the first assembly plate 110 and the second assembly plate 120 are joined.

In the above, preferred embodiments of the present invention have been described by way of example, but the scope of the present invention is not limited to these specific embodiments, and may be appropriately modified within the scope set forth in the claims.

100: steel structure
110: First assembly plate 111: Provisional assembly key
120: Second assembly plate 121: Keyway
130: Reinforcement plate 131: External force distribution hole
200: Jig
210: fixing part 211: fixing groove
212: first guide slope 213: second guide slope
220: bracket part 230: support part
240: connection part

Claims (6)

A first step of providing a preassembled steel structure;
A second step of mounting the steel structure using a plurality of jigs;
A third step of pressing the upper surface of the steel structure so that the lower surface and both sides of the steel structure are in close contact with the fixing groove of the jig; and
A fourth step of twisting the steel structure by pressing the jig so that the lower surface of the jig is parallel to the ground.
According to paragraph 1,
The jig,
a fixing part in which the bottom surface and the inner surface of the fixing groove are formed at right angles to each other; and
A twisting method of a steel structure using a jig including a support part coupled to the lower end of the fixing part so that the fixing part is perpendicular to the ground.
According to paragraph 1,
A twisting method of a steel structure using a jig, characterized in that the width of the fixing groove is the same as the width of the steel structure.
According to paragraph 1,
The jig is arranged to be spaced apart in the direction of extension of the steel structure,
A twisting method of a steel structure using a jig, characterized in that the angle formed between the bottom surface of the fixing groove and the ground is set differently depending on the position where the jig is placed.
According to paragraph 1,
In the third step,
A twisting method for a steel structure using a jig, characterized in that the position of the jig is not restricted in the height direction.
According to paragraph 1,
The steel structure is
a pair of first assembly plates on which temporary assembly keys are formed to protrude at regular intervals along the extension direction of the steel structure on both sides; and
A twisting method of a steel structure using a jig, characterized in that a pair of second assembly plates having key grooves for receiving the provisional assembly key formed on both sides thereof are provisionally assembled perpendicular to each other.

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