KR20230136455A - Hybrid Beam Structure Using Thin Steel Plate - Google Patents

Abstract

The present invention assembles a pair of formed steel plates with a composite beam to fill the inside with concrete to form a cross section that is a mixture of a T-shaped cross section and a U-shaped cross section, and configures a reinforcing member in a certain section of the longitudinal center, during construction. This relates to a composite beam for maintaining a low profile height over a long span, which provides reinforcement against deflection and allows for weight reduction by adjusting the thickness and height of the steel plate.
A preferred embodiment of the present invention includes a plate-shaped lower flange, an inner vertical plate extending vertically upward from one end in the width direction of the lower flange, and an upper flange extending horizontally inside the lower flange from the upper end of the inner vertical plate. And, the steel plate is formed to consist of an outer vertical plate extending vertically upward from the other end in the width direction of the lower flange so that the upper end is located within the height of the inner vertical plate, and a support plate extending outward in the width direction from the upper end of the outer vertical plate. A composite beam in which a pair of manufactured unit members are joined so that the inner vertical plates come into contact with each other; It includes a reinforcing member formed on the lower flange of the composite beam in some sections of the longitudinal center of the composite beam.

Description

Composite beam to maintain low height in long span {Hybrid Beam Structure Using Thin Steel Plate}

The present invention assembles a pair of formed steel plates with a composite beam to fill the inside with concrete to form a cross section that is a mixture of a T-shaped cross section and a U-shaped cross section, and configures a reinforcing member in a certain section of the longitudinal center, during construction. This relates to a composite beam for maintaining a low profile height over a long span, which provides reinforcement against deflection and allows for weight reduction by adjusting the thickness and height of the steel plate.

In existing steel frame buildings, the overall floor height increases because the floor plate is placed on top of the steel beam, but in the floor height reduction method, the floor plate is inserted into the web of the steel beam for construction, so the thickness of the floor plate becomes thinner and the floor height can be relatively reduced. The web-embedded composite beam method, which allows floor height reduction, was first developed in Northern Europe for purposes such as limiting the height of buildings and expanding or remodeling existing buildings. After being introduced to the UK, it is an excellent flooring system that has raised the competitiveness of steel-framed buildings to a higher level through research and development. As a result, various cross-sectional shapes have been developed so far.

This floor height reduction method is very effective in reducing floor height, but the span that can be constructed is limited because the dance of the composite beam is limited due to the limitations of the applicable floor slab system. In addition, even in the case of Korea's own composite beam system developed to reduce floor height, inconvenient points were found, such as a small floor height reduction effect or low application efficiency when manufacturing and constructing asymmetric steel beams.

The technology behind the present invention includes Patent Registration No. 0626542, “Composite beam structure using composite beam and concrete” (Patent Document 1). In the above background technology, '(a) a bottom plate formed by installing a thin steel plate in a horizontal direction to form the lower surface of the beam; a pair of side vertical plates extending in a vertical direction from both ends of the bottom plate and forming both sides of the beam; a support wing extending horizontally from the top of the side vertical plate; a central vertical plate that is vertically positioned at the upper center of the bottom plate and is formed to have a length longer than that of the side vertical plates; An upper flange extending horizontally from the top of the central vertical plate and forming a 'T' shape with the central vertical plate; a composite beam comprising a; (b) a floor plate unit installed with its end supported on the upper part of the composite beam support wing to form a slab structure; and, (c) beam-slab concrete poured integrally inside the composite beam and on top of the floor plate unit; We propose a 'composite beam structure using composite beams and concrete including'.

However, the above background technology had problems such as sagging during construction and limitations in applicable spans.

Patent Registration No. 0626542 “Composite beam structure using composite beam and concrete”

The present invention is intended to solve the problems described above. It provides reinforcement against deflection during construction, allows for weight reduction by adjusting the thickness of the steel plate, and implements a slim floor without increasing the overall floor height. It can also be implemented by assembling formed steel plates. The purpose is to provide a composite beam that facilitates assembly and welding when formed.

The present invention includes a plate-shaped lower flange, an inner vertical plate extending vertically upward from one end in the width direction of the lower flange, an upper flange extending horizontally inside the lower flange from the upper end of the inner vertical plate, and the lower flange. A unit member manufactured by forming a steel plate to consist of an outer vertical plate extending vertically upward so that the upper end of the other end in the width direction is located within the height of the inner vertical plate, and a support plate extending outward in the width direction from the upper end of the outer vertical plate. A composite beam in which the pair is joined so that the inner vertical plates come into contact with each other; The present invention seeks to provide a composite beam for maintaining a low profile height over a long span, which includes a reinforcing member formed on the lower flange of the composite beam in some sections of the longitudinal center of the composite beam.

In addition, the reinforcing member consists of a horizontal plate-shaped reinforcing plate with a width that is a certain size larger than the width of the composite beam, and is configured to be joined to the lower surface of the lower flange to provide a composite beam for maintaining a low profile height over a long span. do.

In addition, the reinforcing member consists of a vertical part in the shape of a vertical plate and an upper horizontal part in the shape of a horizontal plate horizontally configured at the upper end of the vertical part, and the lower end of the vertical part is joined to the upper surface of the lower flange of the unit member. The purpose is to provide a composite beam to maintain a low profile height of the span.

In addition, the reinforcing member additionally consists of a lower horizontal part formed horizontally at the lower end of the vertical part, and the lower surface of the lower horizontal part is joined to the upper surface of the lower flange of the unit member to maintain a low profile height for a long span. We would like to provide composite beams.

In addition, the reinforcing member maintains a low profile height over a long span, characterized in that a horizontal plate-shaped reinforcing plate with a width that is a certain size larger than the width of the composite beam is joined to the lower end of the vertical portion on the upper surface of the lower flange of the unit member. We would like to provide a composite beam for this purpose.

In addition, the synthetic beam is cut longitudinally in the widthwise central part of the lower flange of each unit member in some sections of the longitudinal central portion to form a fitting cutout, and the reinforcing member has a horizontal plate shape with a width that is a certain size larger than the width of the composite beam. A reinforcing plate, a vertical portion in the shape of a vertical plate configured to be symmetrical and spaced a certain distance in the width direction to have the same spacing as the fitting cutout of the pair of unit members on the upper surface of the reinforcing plate, and a vertical portion at the upper end of the vertical portion, respectively. It consists of an upper horizontal part in the shape of a horizontal plate that is configured horizontally in the outward direction, and the upper horizontal part and vertical part are inserted into the fitting cutout of the unit member to fix the position, and then the reinforcement plate and the unit member are joined. We would like to provide a composite beam to maintain the height.

In addition, it is intended to provide a composite beam for maintaining a low profile height over a long span, characterized in that a plurality of gap maintenance members are configured to connect the upper flange and the support plate in the unit member.

The composite beam for maintaining a low profile height in a long span of the present invention includes reinforcing members in some sections of the longitudinal center to provide reinforcement against deflection during construction, while the reinforcing members formed inside the cross section serve as reinforcing bars to maintain the cross section. With this reinforcement, it is possible to adjust the thickness of the composite beam's steel plate, thereby reducing the weight. When reinforcing the lower part of the cross section of the composite beam, it can effectively cope with deflection in the central part, making it possible to adjust the height of the composite beam through reinforcement when the floor height is limited. .

In addition, by assembling a pair of formed steel plates to form a cross section that is a mixture of a T-shaped cross section and a U-shaped cross section, the rigidity is higher compared to the cross-sectional area compared to beam members of existing structural types, resulting in excellent structural efficiency and In terms of joint type, existing joint methods can be used, and when using dry floor slab units such as deck plates and PC slabs as well as cast-in-place concrete slabs, there is a very useful effect of realizing a slim floor without increasing the overall floor height. there is.

In particular, when assembling a pair of formed steel plates using a reinforcing member, the assembly position and welding can be facilitated, which not only facilitates assembly but also allows the production of composite beams of accurate specifications.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention along with the detailed description of the invention. Therefore, the present invention is limited to the matters described in the attached drawings. It should not be interpreted as limited.
Figure 1 is a side view showing an example of installation of a composite beam for maintaining a low profile height in a long span of the present invention.
Figure 2 is a perspective view of a composite beam for maintaining a long span and low profile height of the present invention.
Figure 3 is a cross-sectional view taken along line AA of Figure 1.
Figure 4 is a cross-sectional view taken along line BB of Figure 1.
Figure 5 is a cross-sectional view showing another embodiment of a composite beam for maintaining a low profile height over a long span of the present invention.
Figure 6 is a perspective view of an embodiment in which the gap maintenance member is configured in the present invention.

Below, the present invention will be described in detail with reference to embodiments shown in the attached drawings, but the presented embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

Hereinafter, the technical configuration of the present invention will be described in detail according to preferred embodiments.

Figure 1 is a side view showing an example of the installation of a composite beam for maintaining a low form height in a long span of the present invention, Figure 2 is a perspective view of a composite beam for maintaining a low form height in a long span of the present invention, and Figure 3 is a line A-A of Figure 1. It is a cross-sectional view along line , and FIG. 4 is a cross-sectional view along line B-B of FIG. 1.

As shown in FIG. 1, the present invention is a partial section of the longitudinal central portion ( The reinforcing member 20 is constructed at 1/2 Ln).

As shown in Figure 3, the composite beam 10 is formed by forming a steel plate using various methods such as press processing or roll forming processing to form a unit member 110, and a pair of unit members are welded to form a T-shaped cross section and a U-shaped cross section. It should be formed into a cross section.

The unit member 110 of the present invention includes a plate-shaped lower flange 111, an inner vertical plate 112 extending vertically upward from one end in the width direction of the lower flange 111, and an inner vertical plate 112. The upper flange 113 extends horizontally from the upper end to the inner side of the lower flange 111, and the upper flange 113 extends vertically upward from the other end in the width direction of the lower flange 111 so that the upper end is located within the height of the inner vertical plate 112. It consists of an outer vertical plate 114 and a support plate 115 extending outward in the width direction from the upper end of the outer vertical plate 114.

The lower flange 111 and the inner vertical plates 112 and outer vertical plates 114 on both sides have a U-shaped cross section to facilitate filling of concrete inside.

At this time, the height of the outer vertical plate 114 is located within the height of the inner vertical plate 112 so that there is a height difference, which is used to mount decks, slabs, etc. on the support plate 115 at the top of the inner vertical plate 11. , At this time, the deck, slab, etc. are located within the dance of the composite beam 10, so that floor height can be reduced by the height located within the dance of the composite beam 10.

The support plate 115 provides a mounting surface on which a deck or slab is mounted and has a horizontal surface, and is located at the upper end of the outer vertical plate 112 in the outer horizontal direction relative to the lower flange 111, that is, opposite to the inner vertical plate 112. It is preferable that it extends in the direction, but if necessary, it can also be formed in the inner horizontal direction.

An upper flange 113 is formed at the upper end of the inner vertical plate 112 by extending in the horizontal direction inside the lower flange 111 from the upper end of the inner vertical plate 112.

The upper flange 113 may be used as a work platform during construction, and its width is formed to be smaller than the width of the lower flange 111 to minimize interference when mounting the support plate 115 of the deck or slab.

Such a unit member 110 is manufactured by forming a steel plate, and a pair is joined by intermittent or continuous welding so that the inner vertical plates 112 come into contact to form the composite beam 10.

In this way, even if the composite beam 10 is formed as a thin plate by butt-welding a pair of unit members 110, the rigidity of the vertical central portion is maintained by the inner vertical plate 112 that is butt-welded, and the upper compression side is of the flange. The width is narrow, and the lower tension side has an asymmetric structure with a wide flange.

In the case of the unit member 110 of the present invention, the steel plate material can be formed relatively easily through press processing or roll forming processing, so the manufacturing cost can be lowered compared to the section steel member commonly used as a reinforced steel frame, resulting in construction cost savings. can be expected, and since embossing, dovetails, wedges, etc. can be formed on the surface during steel sheet forming processing, shear reinforcement means can be easily formed.

In addition, in the case of the composite beam 10 formed of a pair of unit members 110, it has a mixed cross section of a T-shaped cross section and a U-shaped cross section, so a pair of inner vertical plates in contact with a pair of upper flanges 113 (112) and a pair of lower flanges (111) have an H-shaped cross section, so the joining method of the existing H-shaped cross section can be applied as is, making it easy to join with steel columns, which can improve construction efficiency and quality. You can get the effect.

In particular, in the present invention, the upper or lower reinforcing member 20 of the lower flange 111 is formed in some sections of the longitudinal center of the composite beam 10 to reinforce deflection during construction, and adjust the height of the composite beam through this reinforcement. Make this possible.

As shown in FIG. 2A, the reinforcing member 20 is formed on the upper surface of the lower flange 111 by forming a vertical plate-shaped vertical portion 210 and a member horizontally extending outward from the upper end of the vertical portion 210, respectively. , as shown in Figure 2b, the plate-shaped reinforcement plate 260 may be formed on the lower surface of the lower flange 111, or as shown in Figure 4c, it may be formed on both the upper and lower surfaces of the lower flange 111. It may be possible.

Specifically, as shown in Figure 4c, the reinforcing member 20 is made of a horizontal plate-shaped reinforcing plate 260 and is joined to the lower surface of the lower flange 111 to efficiently cope with sagging in the central part. can do.

At this time, the reinforcement plate 260 has a width that is a certain size larger than the width of the composite beam 10, and when configured at the lower part of the pair of lower flanges 111 in the composite beam 10, the reinforcement plate 260 is formed on both sides in the width direction of the composite beam 10. By protruding a certain width, it facilitates welding with the outer vertical plate 114 of the unit member 110, and at the same time serves to prevent it from flowing down during work such as fire spraying.

As shown in FIG. 4A, the reinforcing member 20 consists of a vertical portion 210 in the shape of a vertical plate and an upper horizontal portion 220 in the shape of a horizontal plate horizontally configured at the upper end of the vertical portion 210, forming a unit The lower end of the vertical portion 210 may be joined to the upper surface of the lower flange 111 of the member 110.

At this time, the vertical portion 210 is preferably located in the center of the lower flange 111 in the width direction, and the upper horizontal portion 220 is configured in the horizontal direction on one side from the upper end of the vertical portion 210 to have an A-shaped cross section. Alternatively, the central portion in the width direction of the upper horizontal portion 220 may be joined to the upper end of the vertical portion 210 to have a T-shaped cross section.

In the case of such a vertical portion 210 and an upper horizontal portion 220, the upper horizontal portion 220 is located above the lower flange 111 by the height of the vertical portion 210, thereby forming a cross section of the composite beam 10. Since it is constructed internally, it acts as a reinforcing bar, reinforcing the cross section, allowing the thickness of the composite beam steel plate to be adjusted to reduce weight, and also has the effect of eliminating or reducing the reinforcing bars placed inside.

In addition, as shown in Figure 4b, the reinforcing member 20 is additionally configured to have a lower horizontal part 230 formed horizontally at the lower end of the vertical part 210 to have a U-shaped cross section, so that the lower part of the unit member 110 By ensuring that the lower surface of the lower horizontal portion 230 is joined to the upper surface of the flange 111, the lower horizontal portion 230 is stably supported by the lower flange 111 and the jointed area can be increased. .

In addition, as shown in FIG. 4D, the reinforcing member 20 is a horizontal plate-shaped reinforcing plate 260 having a width that is a predetermined size greater than the width of the composite beam 10, and the lower flange 111 of the unit member 110 ) can be configured by joining the lower end of the vertical portion 210 to the upper surface of the vertical portion 210.

Figure 5 is a cross-sectional view showing another embodiment of a composite beam for maintaining a low profile height in a long span of the present invention, and Figure 6 is a perspective view of an embodiment in which a gap maintenance member is configured in the present invention.

In particular, the composite beam 10 of the present invention is formed by welding a pair of unit members 110 so as to be symmetrical, but at this time, it is difficult to assemble the pair of unit members 110 in contact to achieve exact symmetry. Since it is difficult to weld, the reinforcing member 20 can be used to facilitate assembly and welding.

To this end, as shown in FIG. 5, the composite beam 10 is cut in the longitudinal direction at the widthwise center of the lower flange 111 of each unit member 110 in a partial section of the longitudinal center to form a fitting cutout 118. As such, the reinforcing member 20 includes a horizontal plate-shaped reinforcing plate 260 having a width that is a certain size larger than the width of the composite beam 10, and a pair of unit members ( A vertical portion 210 in the shape of a vertical plate configured to be symmetrical and spaced a certain distance in the width direction to have the same spacing as the fitting cutout 118 of 110), and a horizontal portion configured to be horizontal at the upper end of the vertical portion 210 It is made of a plate-shaped upper horizontal portion 220.

At this time, because the vertical portion 210 is shaped to protrude from the upper part of the reinforcement plate 260, the unit member 110 is tilted so that the upper horizontal portion 220 and the vertical portion 210 are cut into the unit member 110. After correcting the position by inserting it into the part 118 and fixing the position, the opposite unit member 110 can be assembled in the same way so that it is exactly symmetrical at the top of the information steel plate 260.

Since a pair of unit members 110 are assembled by inserting them into the upper horizontal portion 220 and the vertical portion 210 on both sides, respectively, at the upper part of the reinforcement plate 260, for convenience of assembly, the upper horizontal portion 220 has one Each of the pair of vertical portions 210 is formed outward in the width direction with respect to the reinforcement plate 260.

In addition, as shown in Figure 6, since the unit member 110 is manufactured by forming a thin steel plate, problems such as the outer vertical plate 114 spreading outward may occur, and the upper flange in the unit member 110 A plurality of gap maintenance members 30 are configured to connect (113) and the support plate 115, so that the gap maintenance members 30 connect and restrain the upper flange 113 and the support plate 115 even during construction or after pouring concrete. It serves as a gap maintenance material to prevent the vertical plate 114 from opening, and also serves as a shear connector when pouring concrete.

The gap maintenance member 30 has a horizontal surface on which the upper flange 113 and the support plate 115 are respectively joined to the upper surfaces of the upper flange 113 and the support plate 115, making welding very easy. In addition, it can prevent the gap maintenance member (30) from falling or being separated due to load during construction. In particular, when the height of the composite beam (1) is high, the T-shaped upper flange, which may be caused by the load during construction, It plays a role in preventing buckling of (113).

As described above, the composite beam for maintaining a low profile height in a long span of the present invention includes a reinforcing member in a portion of the central section in the longitudinal direction to provide reinforcement against deflection during construction, while the reinforcing member formed inside the cross section serves as a reinforcing bar. By doing so, the cross section is reinforced and the thickness of the composite beam's steel plate can be adjusted, making it lighter. When reinforcing the lower part of the composite beam's cross section, it can effectively cope with deflection in the center, allowing the height of the composite beam to be adjusted through reinforcement when floor height is limited. This is possible.

In addition, by assembling a pair of formed steel plates to form a cross section that is a mixture of a T-shaped cross section and a U-shaped cross section, the rigidity is higher compared to the cross-sectional area compared to beam members of existing structural types, resulting in excellent structural efficiency and In terms of joint type, existing joint methods can be used, and when using dry floor slab units such as deck plates and PC slabs as well as cast-in-place concrete slabs, there is a very useful effect of realizing a slim floor without increasing the overall floor height. there is.

In particular, when assembling a pair of formed steel plates using a reinforcing member, the assembly position and welding can be facilitated, which not only facilitates assembly but also allows the production of composite beams of accurate specifications.

So far, the present invention has been described in detail with reference to the presented embodiments, but those skilled in the art can make various variations and modifications without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by such variations and modifications, but is limited by the claims appended below.

10: composite beam
110: unit member
111: lower flange
112: inner vertical plate
113: upper flange
114: outer vertical plate
115: support plate
20: Reinforcement member
260: Reinforcement plate
30: gap maintenance member

Claims (7)

A plate-shaped lower flange 111, an inner vertical plate 112 extending vertically upward from one end in the width direction of the lower flange 111, and an inner side relative to the lower flange 111 from the upper end of the inner vertical plate 112. An upper flange 113 extending horizontally, an outer vertical plate 114 extending vertically upward so that the upper end of the other end in the width direction of the lower flange 111 is located within the height of the inner vertical plate 112, and an outer A pair of unit members 110 manufactured by forming a steel plate to consist of a support plate 115 extending outward in the width direction from the upper end of the vertical plate 112 are joined so that the inner vertical plate 112 abuts,
A composite beam for maintaining a low profile height over a long span, comprising a reinforcing member (20) formed on the lower flange (111) in a portion of the longitudinal central portion of the unit member (110). In claim 1,
The reinforcing member 20 is made of a horizontal plate-shaped reinforcing plate 260 with a width that is a certain size larger than the width of the composite beam 10, and is configured by being joined to the lower surface of the lower flange 111. Composite beam to maintain low profile height of span. In claim 1,
The reinforcing member 20 consists of a vertical portion 210 in the shape of a vertical plate and an upper horizontal portion 220 in the shape of a horizontal plate horizontally configured at the upper end of the vertical portion 210,
A composite beam for maintaining a low profile height over a long span, characterized in that the lower end of the vertical portion 210 is joined to the upper surface of the lower flange 111 of the unit member 110. In claim 1,
The reinforcing member 20 additionally includes a lower horizontal portion 230 formed horizontally at the lower end of the vertical portion 210,
A composite beam for maintaining a low profile height in a long span, characterized in that the lower surface of the lower horizontal part 230 is joined to the upper surface of the lower flange 111 of the unit member 110. In claim 3 or claim 4,
The reinforcing member 20 has a horizontal plate-shaped reinforcing plate 260 having a width that is a certain size larger than the width of the composite beam 10,
A composite beam for maintaining a low profile height over a long span, characterized in that the lower end of the vertical portion 210 is joined to the upper surface of the lower flange 111 of the unit member 110. In claim 1,
The composite beam 10 is cut longitudinally in the widthwise center of the lower flange 111 of each unit member 110 in a partial section of the longitudinal center to form a fitting cutout 118,
The reinforcing member 20 is,
A horizontal plate-shaped reinforcement plate 260 having a width that is a certain size larger than the width of the composite beam 10,
A vertical portion 210 in the shape of a vertical plate configured to be symmetrical and spaced a certain distance in the width direction to have the same spacing as the fitting cutout 118 of the pair of unit members 110 on the upper surface of the reinforcement plate 260. and,
It consists of an upper horizontal part 220 in the shape of a horizontal plate that is horizontally configured in an outward direction at the upper end of the vertical part 210,
After the upper horizontal portion 220 and the vertical portion 210 are inserted into the fitting cutout 118 of the unit member 110 and fixed in position,
A composite beam for maintaining a low profile height over a long span, characterized in that the reinforcing plate 260 and the unit member 110 are joined. In claim 1,
A composite beam for maintaining a low profile height over a long span, characterized in that a plurality of gap maintenance members 30 are configured to connect the upper flange 113 and the support plate 115 in the unit member 110.

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