KR102635664B1 - Combined Structure of Long-term Steel Frame for Column Free Space - Google Patents

Abstract

The present invention relates to a joint structure of a long-span steel frame for a column-free space that enables a robust combination of a steel beam and a steel column while reducing deformation of the steel beam due to the load acting on the steel beam.
The combined structure of a long-span steel frame for a column-free space according to the present invention to solve the above problems includes a pair of steel columns spaced apart from each other and installed vertically to have a predetermined length; A connecting beam of a predetermined length installed horizontally to face each other at a predetermined height of the pair of steel columns; an upper support beam, one end of which is fixed to one side of the pair of steel columns, and the other end of which is installed along the upper surface of the connecting beam and protruding by a predetermined length toward the distal end; a lower support beam, one end of which is fixed to one side of the pair of steel columns, and the other end of which is installed along the bottom of the connecting beam and protruding by a predetermined length toward the distal end; A steel beam of a predetermined length installed horizontally to face the tip of the connecting beam; And a reinforcing frame of a predetermined length installed on both sides of the connecting beam and the steel beam and assembled to be in close contact with each other through a fastening member, wherein one end of the reinforcing frame is fixed to the steel column through a fastening member having a predetermined length. The other end is fixed to the connecting beam through a fastening member having a predetermined length, and is installed so that a predetermined attractive force is applied to pull both ends of the connecting beam toward the steel column through the reinforcing frame.

Description

Combined Structure of Long-term Steel Frame for Column Free Space}

The present invention relates to a long-span steel frame for a column-free space, and more specifically, to a column-free space in which vertical steel columns are installed only at both ends of a steel beam of a predetermined length installed in the horizontal direction to form a column-free space between the steel columns. It is about long-span steel framing for .

In general, the steel structure that forms the framework of a building consists of a plurality of vertically installed steel pillars and a plurality of steel beams connecting the plurality of steel pillars. For the safety of the structure, the longer the length of the steel beam, the more steel pillars are added. It is constructed so that the steel beam can safely support the load of the structure.

However, in the above case, there is an advantage that the load of the structure can be safely supported, but there is a problem that the construction cost of the building increases and space utilization efficiency is reduced due to the presence of multiple pillars in the indoor space.

Therefore, instead of installing steel columns at both ends of the steel beam, a column-free construction method that does not install additional columns between the two ends of the steel beam has been developed.

As a prior art for the above purpose, an end-reinforced steel structure (hereinafter referred to as 'patent document') is disclosed in Patent Publication No. 1642420.

The patent document describes steel columns provided vertically with a gap between each other, connecting beams connecting the steel columns and horizontally connected and fixed to the steel columns, and cast steel beams connecting the connecting beams. A steel beam having joint plates that connect and couple the joints of the connecting beam and the cast iron beam; A compression reinforcement material having one end fixed to the steel column at both lower ends of the steel beam and supporting both lower ends of the steel beam to reinforce resistance against compressive load; An end-reinforced steel frame consisting of a tensile reinforcement material that is fixed to the steel column at one end at the top of both sides of the steel beam and supports the tops of both sides of the steel beam to reinforce the strength against the tensile load occurring at the top of both sides of the steel beam. In the structure, the tensile reinforcement is a horizontal frame made of a 'plate' shaped plate body and a vertical frame made of a 'plate' shaped plate body that extends downward from the lower part of the horizontal frame and is fixed to the upper surface of the steel beam. It is formed of a steel beam with a cross-sectional shape of '┳' shape, and the horizontal frame is provided with a binding section formed with a groove cut inward to induce a generated plastic hinge to generate brittle fracture; The binding section is disposed in the center of the horizontal frame in plan and is made of grooves each formed in an arc shape from the outside to the inside; The width of the groove forming the binding section is formed to have a length of 1/5 to 1/4 of the total width of the horizontal frame; The above-described compression reinforcement is made of a bottom plate made of a 'plate'-shaped plate, and a bonded plate made of a 'plate'-shaped plate that extends upward from the top of the bottom plate and is fixed to the bottom of the steel beam, It is formed as a steel beam with a cross-sectional shape of '┻' shape; The tensile reinforcement is made of a smaller size than the compression reinforcement so that plastic bending and plastic hinges due to the applied load are guided to the tensile reinforcement; The joint plates are arranged horizontally and vertically at the joints of the connecting beam and the cast iron beam to be connected and coupled; The joint plate has a plurality of anti-vibration grooves formed on its surface; The anti-vibration groove is formed in a hexagonal shape and is continuously arranged up, down, left and right in a honeycomb structure; In the above-mentioned anti-vibration groove, a through hole is formed through which a bolt connecting and fixing the connecting beam and the cast iron beam passes through; The above-described anti-vibration groove is made of a size that can be fastened while rotating while the bolt and nut are accommodated.

However, in the construction structure of the conventional long-span steel beam as described above, reinforcing materials supporting the upper and lower surfaces of the steel beam are additionally installed on the steel column, and a large tensile force is generated at the connection portion of the steel column due to the load acting on the steel beam through these reinforcing materials. It is designed to support it firmly even when compressive force is applied. However, in this case, the deformation of the steel beam due to the load acting on the steel beam between the steel columns depends solely on the structural rigidity of the steel beam, so the deformation due to the load acting on the steel beam occurs on both sides. There is a problem where steel columns can be deformed in the direction facing each other.

Therefore, there is a need for the development of a long-span steel frame combination structure with an improved structure that can reduce the deformation of the steel beam due to the load acting on the steel beam and enable a robust connection between the steel beam and the steel column.

KR 10-1642420 B1 (2016. 07. 19.) KR 10-1711614 B1 (2017. 02. 23.) KR 10-1082575 B1 (2011. 11. 04.) KR 10-2022-0102953 A (2022. 07. 21.)

The present invention was developed to solve the problems of the conventional long-span steel frame joint structure as described above. The problem that the present invention aims to solve is to enable a robust connection between a steel beam and a steel column, while also allowing for a strong connection between the steel beam and the steel column. The goal is to provide a combined structure of long-span steel frames for column-free spaces that can reduce deformation of steel beams.

The combined structure of a long-span steel frame for a column-free space according to the present invention to solve the above problems includes a pair of steel columns spaced apart from each other and installed vertically to have a predetermined length; A connecting beam of a predetermined length installed horizontally to face each other at a predetermined height of the pair of steel columns; an upper support beam, one end of which is fixed to one side of the pair of steel columns, and the other end of which is installed along the upper surface of the connecting beam and protruding by a predetermined length toward the distal end; a lower support beam, one end of which is fixed to one side of the pair of steel columns, and the other end of which is installed along the bottom of the connecting beam and protruding by a predetermined length toward the distal end; A steel beam of a predetermined length installed horizontally to face the tip of the connecting beam; And a reinforcing frame of a predetermined length installed on both sides of the connecting beam and the steel beam and assembled to be in close contact with each other through a fastening member, wherein one end of the reinforcing frame is fixed to the steel column through a fastening member having a predetermined length. The other end is fixed to the connecting beam through a fastening member having a predetermined length, and is installed so that a predetermined attractive force is applied to pull both ends of the connecting beam toward the steel column through the reinforcing frame.

And, in the steel column of the present invention, a plurality of fastening holes having a predetermined diameter are formed in accordance with the height of one end of the connecting beam, and in the reinforcement frame, through holes are formed in accordance with the positions of the plurality of fastening holes, and have a predetermined length. Bolts are installed to sequentially penetrate the fastening hole and the through hole, and then the strength of the attractive force exerted by one end of the reinforcement frame toward one side of the steel column is adjusted by adjusting the degree to which a plurality of nuts are assembled to the bolt. Another feature is that it is structured as much as possible.

In addition, the present invention further provides vertical plates installed at both ends of the steel beam facing the other end of the reinforcement frame and spaced apart at a predetermined interval, and a fastening member is installed to penetrate the other end of the reinforcement frame and the vertical plate to form the steel beam. Another feature is that both ends are installed so that attractive force acts toward the steel column.

According to the present invention, in a long-span steel beam installed to horizontally connect a pair of steel columns, both end portions of the steel beam are firmly fixed to the connecting beam and an attractive force acts toward the steel column through the reinforcing frame and fastening member. As it is installed, a constant force (prestress) is applied, which has the advantage of suppressing and reducing deformation such as sagging in the middle part of the steel beam due to load.

In addition, the assembly structure is simple, so there is an advantage that the steel beam can be easily installed on the steel column.

Figure 1 is a perspective view showing an example of a combined structure of a long-span steel frame for a column-free space according to the present invention.
Figure 2 is a front view of Figure 1.
Figure 3 is a perspective view showing an example of a steel column and connecting beam according to the present invention.
Figure 4 is a front view of Figure 3.
Figures 5 and 6 are views showing examples of steel beams according to the present invention.
Figure 7 is a perspective view showing an example of a reinforcement frame according to the present invention.
Figure 8 is a front view of Figure 7.
Figure 9 is a diagram showing an example of the use of a long-span steel frame combination structure for a column-free space according to the present invention.
Figure 10 is a view showing another embodiment of a long-span steel frame combination structure for a column-free space according to the present invention.
Figure 11 is a view showing an example in which fastening members are installed to penetrate both ends of the reinforcing frame according to the present invention so that the steel beam is directly fixed to the steel column.

Hereinafter, the present invention will be described in detail according to the accompanying drawings showing preferred embodiments.

The present invention is intended to provide a combination structure of long-span steel frames for a column-free space that enables robust coupling of steel beams and steel columns while reducing deformation of the steel beams due to the load acting on the steel beams. This invention is shown in Figures 1 and As shown in Figure 2, it includes a steel column 10, a connecting beam 20, an upper support beam 30, a lower support beam 40, a steel beam 50, and a reinforcing frame 60.

The steel columns 10 are installed in pairs to be spaced apart from each other and have a predetermined length vertically, so that the steel beams 50, which will be described later, are supported and installed horizontally.

This steel column 10 includes a vertical beam 11 of an “H” cross-section shape installed vertically to have a predetermined length as shown in FIGS. 3 and 4, and a horizontal beam 11 on the vertical beam 11. It includes a plurality of reinforcement plates 12 installed.

At this time, the reinforcement plate 12 supports the load acting on the steel column 10 through the connecting beam 20, which will be described later, and is reinforced to prevent deformation. To this end, it corresponds to the connecting beam 20, which will be described later. A plurality of pieces may be installed at a given height, or a plurality of pieces may be installed at a predetermined distance apart from each other on the upper and lower sides of the connecting beam 20.

In addition, a plurality of fastening holes 11A are formed in the vertical beam 11 for installing the reinforcing frame 60, which will be described later, so that attractive force is applied toward the steel column 10 through the fastening member. These fastening holes 11A is located at one end of the connecting beam 20 and is located between a pair of horizontal parts 21 to be described later.

The connecting beam 20 is installed horizontally at a predetermined height of the steel column 10 and is installed to be connected to one end of the steel beam 50, which will be described later.

This connecting beam 20 vertically connects a pair of horizontal portions 21 having a predetermined horizontal width and the middle portion of the pair of horizontal portions 21, as shown in FIGS. 3 and 4. It is made entirely of a beam with an “H” cross-sectional shape, including the vertical portion 22, and one end of the connecting beam 20 is in close contact with one side of the steel column 10 and is integrally fixed by welding or the like.

And a plurality of first and second fastening parts 21A and 22A having a predetermined diameter are formed in the horizontal part 21 and the vertical part 22 at the other end, and through these first and second fastening parts 21A and 22A. The steel beam 50, which will be described later, is firmly fixed to the connecting beam 20 through the reinforcement frame 60.

The upper support beam 30 and the lower support beam 40 are connected to the connecting beam 20 and the steel beam 50, so that the load acting on the steel beam 50 is welded to the steel column 10 through the connecting beam 20. It is a configuration that reinforces the upper and lower parts of the connecting beam 20 to prevent deformation and damage concentrated in the damaged area.

As shown in FIGS. 3 and 4, the upper and lower support beams 30 and 40 have a “T”-shaped cross-section, and the vertically protruding portions correspond to the upper and lower lengths of the connecting beam 20. It can be welded along and configured to be integrated with each other.

At this time, the free ends (tip) of the upper and lower support beams 30 and 40 may be configured to protrude by a predetermined length (L) relative to the free end (tip) of the connecting beam 20, as shown in FIG. Through this, the portion where the connecting beam 20 and the steel beam 50 are connected is supported and reinforced by the upper and lower support beams 30 and 40.

The steel beam 50 is configured to horizontally connect a pair of steel columns 10 to support the load of an upper structure such as a ceiling.

This steel beam 50 has a pair of horizontal portions 51 having a predetermined width and length in the horizontal direction, as shown in FIGS. 5 and 6, and a predetermined portion vertically connecting the pair of horizontal portions 51. It includes a long vertical portion 52, thereby forming an overall “H” cross-sectional shape.

In addition, first and second fastening parts 51A and 52A are formed at both ends of the steel beam 50 and penetrate the horizontal portion 51 and the vertical portion 52, and the horizontal portion 51 of the steel beam 50 After the reinforcing frame 60 is installed to be in close contact with the vertical portion 52, the fastening members are assembled through the first and second fastening parts 51A and 52A to be firmly coupled to each other.

In addition, a vertical plate 53 is further installed at a predetermined distance from both ends of the steel beam 50 and arranged to be perpendicular to the vertical portion 52 while connecting the upper and lower horizontal portions 51, and this vertical plate 53 A plurality of through holes 53A are formed to correspond to the height of the fastening hole 11A of the steel column 10.

At this time, a horizontal reinforcing plate 54 installed horizontally along the length of the vertical portion 52 of the steel beam 50 may be further installed on the vertical plate 53, and the vertical plate 53 is provided through this horizontal reinforcing plate 54. ) is reinforced so that it is not easily deformed even by strong external forces.

Fastening members such as bolts having a predetermined length are assembled through the through hole 53A of the vertical plate 53 as described above and are fixed to the reinforcement frame 60 so that an attractive force is applied.

In addition, when the fastening member is assembled by penetrating the first fastening part 21A of the connecting beam 20 and the first fastening part 51A of the steel beam 50, both sides of the connecting beam 20 and the steel beam 50 The reinforcing frame 60 is installed, and the connection plates (P) of a predetermined size are installed on the upper and lower surfaces of the joint between the connecting beam 20 and the steel beam 50, and the fastening members are sequentially penetrated and assembled. Even if a large external force is applied to the connection part of the connecting beam 20 and the steel beam 50, the horizontal parts 21 and 51 of the connecting beam 20 and the steel beam 50 are strongly supported from the inside and outside and are easily deformed or It won't be damaged.

The reinforcing frame 60 is installed on both sides where the connecting beam 20 and the steel beam 50 come into contact, and are firmly attached to each other through a plurality of fastening members, so that even if a high load is applied to the steel beam 50, the connecting beam 20 and It is designed to support and reinforce the connected parts so that they are not deformed or damaged.

This reinforcement frame 60 includes a frame part 61 of a predetermined length having a "ㄷ" cross-sectional shape as shown in FIGS. 7 and 8, and a pair installed to cover both ends of the frame part 61. Includes a side plate 62.

And on the upper, lower, and side surfaces of the frame portion 61, a plurality of connections are provided according to the positions of the first and second fastening portions 21A and 22A of the connecting beam 20 and the first and second fastening portions 51A and 52A of the steel beam 50. Two first and second fastening portions 61A and 61B are formed through.

In addition, a plurality of through holes 62A are formed in the side plate 62 corresponding to the positions of the fastening hole 11A of the steel column 10 and the through hole 53A of the steel beam 50.

The reinforcing frame 60 configured as described above is disposed symmetrically on both sides of the connecting beam 20 and the steel beam 50 with the steel beam 50 positioned facing the tip of the connecting beam 20, In this state, fastening members such as bolts and nuts are assembled into the first fastening holes (21A, 51A, 61A) and the second fastening holes (22A, 52A, 61B) and are firmly fixed to each other.

Then, at one end of the reinforcement frame 60 facing the steel column 10, a bolt having a predetermined length is installed to connect the fastening hole 11A and the one side through hole 62A, as shown in FIG. 9. , a plurality of nuts are fastened, and the other end of the reinforcement frame 60 facing the vertical plate 53 of the steel beam 50 has a through hole 53A of the vertical plate 53 and a through hole on the other side of the reinforcement frame 60. A bolt having a predetermined length is installed through the bolt to connect (62A), and then a plurality of nuts are fastened.

At this time, the fastening members on both sides are fastened using a separate device so that a predetermined force of attraction is applied to direct the reinforcement frame 60 toward the steel column 10. Through this, both ends of the steel beam 50 are naturally connected to the reinforcement frame ( The attractive force pulled toward the steel column 10 through the 60) and the fastening member is fixed in a constant state.

In this process, by adjusting the degree of tightening of the nut assembled to the bolt, the strength of the attractive force with which both ends of the steel beam 50 are pulled toward the steel column 10 is adjusted, and in this way, both ends of the steel beam 50 are connected to the steel column. As it is installed to be pulled toward (10), even if the load of the upper structure such as the ceiling is applied to the center part of the column-less steel beam 50 for a long period of time, the steel beam 50 is not easily deformed and the structure is firmly supported.

Meanwhile, in the above, the reinforcing frame 60 is only shown and explained as being installed in a state where the ends of the connecting beam 20 and the steel beam 50 are installed in contact with each other, but unlike this, as shown in FIG. 10, the connecting beam ( The tip of 20) and the tip of the steel beam 50 are installed to be spaced apart by a predetermined distance (G), and the second fastening portions 22A and 52A of the connecting beam 20 and the steel beam 50 have a predetermined length in the horizontal direction. It is formed as a long hole, whereby the reinforcement frame 60 can be pulled toward the steel column 10 by the distance G between the connecting beam 20 and the steel beam 50 through the reinforcement frame 60 and the fastening member. It can be installed so that free space is formed.

At this time, the spacing (G) between the connecting beam 20 and the steel beam 50 is preferably formed within the range of 1 to 2 cm, which prevents both ends of the steel beam 50 from being pulled through the reinforcing frame 60. Even though both ends of the steel beam (50) are not pulled to come into close contact with the tip of the connecting beam (20), if the gap (G) exceeds 2 cm, the steel beam (50) cannot be reliably supported by the connecting beam (20). Therefore, the load acting on the reinforcing frame 60 and the connecting plate (P) becomes relatively large, and as a result, the structural rigidity that secures the steel beam 50 may be weakened, which is not desirable.

On the contrary, if the gap (G) is less than 1 cm, both ends of the steel beam (50) are pulled toward the steel column (10) through the fastening member and when installed so that manpower acts at all times, one end is at the tip of the connecting beam (20). This is undesirable because it is easily touched and supported, making it impossible to reliably apply manpower to both ends of the steel beam (50).

In addition, the ends of the connecting beam 20 and the steel beam 50 are shown and explained only as being installed in contact with a vertical plane. However, unlike this, the ends of the connecting beam 20 and the steel beam 50 are diagonal or correspond to each other. This can be changed and implemented so that a step consisting of grooves and protrusions is formed.

At this time, the connecting beam 20 and the steel beam 50 face each other and extend and protrude so that the connecting beam 20 is located at the top and the steel beam 50 is located at the bottom. This structure allows the steel beam to be formed. Sagging deformation occurs due to the load in the middle portion of (50), which structurally prevents both end portions from rising in the upward direction, and as a result, deformation of the steel beam (50) is further suppressed.

Meanwhile, from above, one end of the reinforcing frame 60 is fixed to the steel column 10 through a fastening member, and the other end is fixed to the vertical plate 53 of the steel beam 50 through a fastening member to form both ends of the steel beam 50. It is shown and explained that it is installed so that permanent manpower acts toward the steel column 10, but unlike this, as shown in FIG. 11, a predetermined structure connecting the vertical plate 53 of the steel column 10 and the steel beam 50 is installed. A long bolt (mounted bolt) is installed to penetrate both ends of the reinforcement frame (60), and then a plurality of nuts are fastened to both ends so that the steel beam (50) is directly fixed to the steel column (10) so that manpower acts on it. You can.

Alternatively, the fastening member installed to connect the steel column 10, the steel beam 50, and the reinforcement frame 60 may be changed to a steel wire of a predetermined diameter instead of consisting of bolts and nuts.

As described above, the present invention relates to a long-span steel beam installed to horizontally connect a pair of steel columns, where both end portions of the steel beam are firmly fixed to the connecting beam, while attracting force toward the steel column through the reinforcing frame and fastening member. As it is installed to act, a constant force (prestress) is applied, and through this, it is possible to reduce deformation such as sagging in the middle part of the steel beam due to the load.

Above, for convenience of explanation, reference numerals and names have been given to the drawings showing preferred embodiments and the configurations shown in the drawings. However, this is an embodiment according to the present invention, and the shapes shown in the drawings and the names given are The scope of the rights should not be construed as limited, and changes to various shapes predictable from the description of the invention and simple substitution with a configuration that performs the same function are within the scope of changes that can be easily carried out by a person skilled in the art. You will see this as extremely self-evident.

10: Steel column 11: Vertical beam
11A: Fastening hole 12: Reinforcement plate
20: connecting beam 21: horizontal part
21A: first fastening portion 22: vertical portion
22A: second fastening part 30: upper support beam
40: lower support beam 50: steel beam
51: horizontal portion 51A: first fastening portion
52: vertical portion 52A: second fastening portion
53: Vertical plate 53A: Through hole
54: Horizontal reinforcement plate 60: Reinforcement frame
61: frame portion 61A: first fastening portion
61B: second fastening portion 62: side plate
62A: Through hole G: Gap
L: Extension protrusion length P: Connection plate

Claims (3)

A pair of steel columns (10) spaced apart from each other and installed vertically to have a predetermined length;
A connecting beam (20) of a predetermined length installed horizontally to face each other at a predetermined height of the pair of steel columns (10);
An upper support beam (30), one end of which is fixed to one side of the pair of steel columns (10) and the other end of which is installed along the upper surface of the connecting beam (20) and protruding by a predetermined length toward the front end;
A lower support beam (40), one end of which is fixed to one side of the pair of steel columns (10) and the other end of which is installed along the bottom of the connecting beam (20) and protruding by a predetermined length toward the front end;
A steel beam (50) of a predetermined length installed horizontally to face the tip of the connecting beam (20); and
A reinforcing frame 60 of a predetermined length installed on both sides of the connecting beam 20 and the steel beam 50 and assembled to be in close contact with each other through fastening members;
Including,
The reinforcement frame 60 is,
One end is fixed to the steel column 10 through a fastening member having a predetermined length, and the other end is fixed to the connecting beam 20 through a fastening member having a predetermined length, and is connected to the reinforcement frame 60. Both ends of the beam 20 are installed so that a predetermined attractive force is applied toward the steel column 10,
At both ends of the steel beam (50),
A vertical plate 53 is installed facing the other end of the reinforcing frame 60 and spaced at a predetermined distance,
A column-free space, characterized in that a fastening member is installed to penetrate the other end of the reinforcing frame 60 and the vertical plate 53 so that both ends of the steel beam 50 exert an attractive force toward the steel column 10. Combined structure of long-span steel frame for.
In claim 1,
In the steel column (10),
A plurality of fastening holes 11A having a predetermined diameter are formed according to the height of one end of the connecting beam 20,
In the reinforcement frame 60,
A through hole (62A) is formed in accordance with the positions of the plurality of fastening holes (11A),
A bolt having a predetermined length is installed to sequentially penetrate the fastening hole 11A and the through hole 62A, and then one end of the reinforcement frame 60 is adjusted by adjusting the degree to which a plurality of nuts are assembled to the bolt. A combined structure of long-span steel frames for a column-free space, characterized in that the intensity of the attractive force acting toward one side of the steel column (10) is adjusted.
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