KR100784191B1 - Composite floor structure using steel beam with web openings and the construction method - Google Patents

Abstract

A composite slab structure using a steel beam with a web having web openings and a construction method of a composite slab structure are provided to fulfill various functions of slabs by securing a space for an access floor sufficiently or a space for lower arrangements, thereby installing an underfloor air distribution system. A composite slab structure using a steel beam with a web having web openings includes a slab unit(100) having a deck formed on the top of a lower flange of a steel beam(200) with a web having web openings(240) or installed over the web, and slab concrete(400) laid with upper reinforcing bars(300) arranged in the slab unit continuously via the web openings of the steel beam and placed to connect web openings. A construction method of the composite slab structure comprises the steps of installing column structures at regular intervals, installing a steel beam with a web having web openings between the column structures, installing a slab unit on the top of a lower flange of the steel beam, arranging many upper reinforcing bars on a lattice bar of a deck in the installation direction of a deck using a spacer to overlap with each other via the web opening of the steel beam, and placing slab concrete on the deck to be lower than the bottom of an upper flange to utilize the space between the top of the slab and the upper flange of the steel beam as a space(A) for an access floor to install air conditioning equipment of an underfloor air distribution system.

Description

COMPOSITE FLOOR STRUCTURE USING STEEL BEAM WITH WEB OPENINGS AND THE CONSTRUCTION METHOD}

Figures 1a, 1b and 1c is a view showing the installation and access flow of the bottom plate, slim flow method of a conventional steel frame building,

2A and 2B show examples of a steel beam in which a through hole (web hole) of the present invention is formed.

3A and 3B show a construction flowchart of a composite bottom plate structure using a steel beam having a through hole (web hole) of the present invention according to the installation position of the bottom plate unit.

4A and 4B show the composite bottom plate structure of the present invention according to the bottom plate unit.

<Description of the symbols for the main parts of the drawings>

100: bottom plate unit (deck) 200: steel beam

210: lower flange of the steel beam 220: steel beam web

230: upper flange of the steel beam 240: through hole (web hole)

250: tensile bottom plate 300: upper reinforcing bar

400: bottom plate concrete A: space for access floor

B: Space for lower level equipment

The present invention relates to a composite bottom plate structure using a steel beam having a through hole formed in the abdomen, and a construction method thereof. More specifically, the low-flow slim-flow method that combines steel beams and concrete enables efficient and economical composite floor system design and construction, while making it easy to utilize as an access flow and secure space for lower floor facilities. It relates to a composite bottom plate structure and its construction method that satisfies the functionality of the.

In recent years, the demand for high-rise buildings continues to increase, and residential apartments, which are constructed of wall reinforced concrete ramen-jos, are also increasingly adopting steel frames as they aim to become high-rise buildings. .

The steel frame building has superior advantages in the variability of the space, the stability and durability of the structure compared to the conventional concrete building, while the bottom plate of the steel frame building as shown in Figure 1a the upper plate (steel beam) the bottom plate ( The construction of 20) increases the overall height of the building, which has several disadvantages such as the increase in self-weight of the building, the increase in construction cost due to the increase in exterior finishing materials, and the reduction of the volume ratio per unit area for the same building height.

In order to solve these problems in steel framed buildings, the slim floor method has been developed.

The slim floor method is a generic name of the synthetic floor plate method that matches the height of the floor plate with the height of the floor plate by inserting (filling) the steel golbo into the concrete floor plate, and the bottom plate on the web of the steel golbo beam. Since the floor height can be reduced because of the construction, there are various advantages such as improvement of the integrity of the bottom plate and cheolgolbo and reduction of exterior materials per unit floor due to the floor height reduction.

Figure 1b is shown the most common form of the combined structure of the conventional cheolgolbo and the bottom plate by the slim floor method.

In the slim floor method according to FIG. 1B, the joint structure of the cheolgolbo and the bottom plate is welded and bonded to a separate steel plate 12 on the lower flange 11 of the cheolgolbo 10, and a deck plate or a hole on the upper portion of the steel plate 12. After mounting the bottom plate unit 20, such as a PC slab, it is made by pouring the bottom plate concrete 30 on top.

However, when the steel girder with a small dance is used to reduce the height of the floor, which is an advantage of the conventional slim floor method, the stiffness of the steel girder is inevitably decreased. There was a problem that you can only use cheolgolbo.

In addition, recently, the necessity of installing a wire for a computer device, a pipe for a facility used in an air conditioning system, and the like is on the rise, so that many access flows (ACCESS FLOOR) are installed.

That is, a plurality of supports 40 are installed on the bottom plate 50, the frame assembly 60 is installed on the support plate, and the bottom finish plate 70 is installed on the frame assembly 60. By installing the wires for the computer equipment in the space for the access floor, the access flow (ACCESS FLOOR) can be completed.

Recently, a so-called floor air conditioning system, which installs an air conditioning system in an access floor space, has been in the spotlight, and a need for lowering the bottom plate has been raised for the installation of the air conditioning system.

Therefore, there is a need to develop a technology that can sufficiently secure the advantages of a composite floor plate structure using a composite beam, such as a conventional slim flow method, which is advantageous for reducing the floor height, while ensuring sufficient access flow space for easy installation of the floor air conditioning system. However, the research and development has been rarely performed.

The present invention is to solve the problems of the prior art, the object of the present invention is basically an abdomen that can sufficiently secure the access flow (ACCESS FLOOR) space in the composite bottom plate structure using a steel beam such as a slim flow method It is to provide a composite bottom plate structure and a construction method using a steel beam formed in the through hole in the.

Another object of the present invention is to effectively reduce the thickness of the bottom plate constituting the composite floor plate and to easily install the floor air conditioning system, etc. in the secured access flow space (ACCESS FLOOR) space, as well as easily secure the space (B) for the lower floor equipment It is possible to provide a composite bottom plate structure and a construction method using a steel beam formed with a through hole in the abdomen that can satisfy the various bottom plate functionality.

The present invention for achieving the above technical problem

A bottom plate unit 100 including a deck having a through hole 240 spaced apart from an upper surface of a lower flange or an upper surface of a lower flange of the steel beam 200 formed in the web 220 (abdomen) and installed over the abdomen; And a bottom plate concrete 400 which is embedded to penetrate the through-holes through which the upper reinforcement 300 which is continuously disposed in the bottom plate unit 100 while penetrating through the through-hole 240 of the steel beam 240 and the web hole is included. It provides a composite bottom plate structure using a steel beam having a through hole formed in the abdomen.

That is, in the construction of the composite floor plate to be constructed by the slim floor method,

Basically, the steel beam 200 can be easily manufactured and economical by using the I-type roll beam rolled and cast into the I-type cross section, and the tensile base can be additionally attached to the I-type roll beam to secure sufficient tensile strength. To ensure sufficient structural functionality of the steel beam,

Through-holes 240 (web holes) are formed in the web (abdomen) of the steel beam, and the upper reinforcing bar is continuously displaced by allowing the upper bars for deck to penetrate the through-holes so that they can be continuously installed. To overcome the structural inefficiency generated.

In other words, considering that the upper reinforcement can be continuously installed on the deck so as to be embedded in the bottom plate concrete, the connecting end of the deck can be premised as a fixed condition, and structural sagging and design moment can be reduced. The thickness can be significantly reduced.

By taking advantage of the fact that the thickness of the composite slab can be reduced, the space between the upper surface of the slab and the upper flange of the steel beam can be utilized as an access flow space by adjusting the formation height of the slab concrete. .

That is, the bottom plate concrete is formed at a lower pouring height than the lower surface of the upper flange of the steel beam, so that the space between the upper surface of the bottom plate and the upper flange of the steel beam can be installed as an air conditioner for the floor air conditioning system. It could be used.

In addition, when the bottom plate unit 100 for forming the bottom plate concrete is to be installed over the abdomen of the steel beam, the space between the bottom surface of the bottom plate and the height of the lower flange of the steel beam is the lower floor space for lighting of the lower floor. (B) can also be used.

In addition, the bottom plate concrete is placed on the deck in the state where the upper reinforcing bar is passed through the through-hole, so that the lower flange and the bottom plate of the I-type roll beam can be smoothly synthesized so that no additional shear connector is required. .

BRIEF DESCRIPTION OF DRAWINGS To describe the present invention more clearly and easily, the following describes the best embodiments of the present invention in detail with reference to the accompanying drawings, and embodiments according to the present invention may be modified in various other forms, and thus the scope of the present invention. Is not limited to the embodiment described below.

2A and 2B illustrate a steel beam 200 formed of a web hole roll beam of an I-section cross-section used in the present invention,

3a and 3b is a view showing the construction of the composite floor plate structure of the present invention according to the bottom plate unit installation position,

4A and 4B show examples of the composite bottom plate of the present invention according to the type of the bottom plate unit.

<Steel beam with through hole (web hole) formed>

The steel beam 200 formed with the web hole is usually purchased as an upper flange 230, a through hole 240, a web 220 having the through hole 240, and the lower flange 210 as shown in FIGS. 2A and 2B. This possible I-type roll beam is used, and the tension bottom plate 250 is further installed on the bottom of the lower flange 210.

The tension bottom plate 250 is integrated with the lower flange 210 of the steel beam 200 so that the lower flange of the steel beam 200 plays a role of increasing the thickness, so that the overall bending rigidity of the steel beam 200 (tensile tension) Strength increase), so that the steel beam 200 of the present invention has a strong bending strength and the like, it is possible to design a dance floor plate, which is an advantage of the slim floor method.

A through hole 240 (web hole) is formed in the web 220 of the steel beam 200. The through holes 240 and the web holes are spaced apart in the longitudinal direction of the steel beam 200 to be continuously formed.

The shape and size of the through-hole 240 (web hole) is not limited otherwise, but may have a diameter and shape such that the pipe for building equipment can be penetrated. In FIG. 2A, a rhombus-shaped through hole 240 (web hole) may be formed. In FIG. 2B, a circular through hole 240 (web hole) may be formed.

As a result, the function of the through hole 240 (web hole) of the present invention is important to allow the upper reinforcing bar bottom unit to be described later to penetrate the upper part of the bottom panel unit continuously or to allow the facility pipe to be installed through. It will play a role.

<Composite Deck Structure Using Steel Beams with Through-holes in Abdomen and Construction Method>

A composite bottom plate structure using a steel beam having a through hole formed in the abdomen and a construction method thereof will be described with reference to FIGS. 3A and 3B.

First, the pillar structure not shown is installed at a predetermined interval. Although not shown, these column structures use steel structures such as H beams.

Between the pillar structures, first, the through-hole 240 (web hole) as shown in Figure 3a is first installed a steel beam (200, I-type roll beam) formed in the web (220, abdomen), which is a product manufactured in advance in the factory You can use it as it is.

The through holes 240 and web holes may be used in a manner of forming the required number of through holes in the beam in the beam fabrication step in advance, but may additionally form the required number of through holes for the I-type roll beam.

At this time, the steel beam 200 and the columnar structure is a mechanical connection method using welding, bolts and nuts is not limited otherwise.

Next, the bottom plate unit 100 is installed on the upper surface of the lower flange 210 of the steel beam 200.

The bottom plate unit 100 can be easily installed in a mounting method by a lifting device in the field by using the product of the deck form in general. In the present invention will be described based on the deck as the bottom plate unit (100).

Such a deck may be a flat truss deck having a lower plate formed of a flat plate and having a triangular pyramid-shaped lattice reinforcing bar installed on the lower plate.

Next, a plurality of upper reinforcement 300 is arranged in the installation direction of the deck by using a spacer (spacer) not shown on the top of the lattice reinforcement of the deck based on the steel beam 200.

At this time, the upper reinforcement 300 is penetrated through the through-holes 240 (web hole) of the steel beam 200 to overlap each other to have a continuity with each other.

The role of the upper reinforcement 300 is arranged to have this continuity is as follows.

In other words, the steel cheolgolbo (steel beam) used in the conventional slim floor method is not formed through the through hole (240, web hole), the upper reinforcement to the deck non-continuously (the method is installed separately for each deck) is bound to As a result, the deck was designed as a slab structure that is supported in the form of simple points based on the steel beams (steel beams).

When the upper reinforcing bar of the deck is continuously installed through the through hole 240, the web hole of the steel beam 200 as in the present invention, the deck is a continuous slab structure with both ends fixed, so that the cross-sectional design is possible By acting as a continuous slab structure, it is possible to reduce the deflection of the deck, the design moment, which will be able to have a technical feature that allows the construction of a lower thickness plate in the slim floor method.

In addition, in recent years, unlike the conventional simple floor plate, it is frequently required to be constructed in a structure in which several equipment is buried. Such equipment pipes need to be installed continuously in the entire bottom plate, and thus, in the present invention, I-type roll beam steel Through the web hole of the beam 200 to allow the pipe for the installation to be continuously installed, it becomes possible to design and construct a more efficient and functional bottom plate.

Next, the bottom plate concrete 400 is placed on the deck so that the upper reinforcing bar and / or facility pipes are embedded.

At this time, the upper reinforcing bar penetrates through the through-hole 240, the web hole, so that the bottom plate concrete is poured in a continuous state, and the upper reinforcing bar can act as a book to enhance the adhesion performance between the bottom plate concrete and the deck. It is possible to enhance the composite performance of the steel beam 200, the bottom plate unit (deck), and the bottom plate concrete, which is an I-type roll beam without additional shear connection construction, and the installation of subsidiary materials is reduced, thereby enabling economic slim floor construction.

In this case, the bottom plate concrete is formed at a lower casting height than the bottom surface of the steel beam, so that the space between the top surface of the bottom plate and the height of the upper flange of the steel beam is an access floor space in which the air conditioning equipment of the floor air conditioning system can be installed. By making it possible to be used in), the composite floor plate according to the present invention can be easily used as an access floor system to which the floor air conditioning system is applied.

That is, a through hole 240, a web hole is formed, and the bottom plate system can be constructed by a slim floor method, which is less danced by the action of the steel beam and the upper reinforcing bar with the tension bottom plate, which is the bottom plate thickness. Since it is possible to reduce the space and the space (A) for the access floor on which the air conditioning equipment of the floor air conditioning system can be installed, it is advantageous to enable effective floor plate design and construction.

According to Figure 3b, as shown in Figure 3a through-holes 240 (web hole) is formed, the bottom plate system by the action of the steel beam, the upper reinforcing bar is formed, the lower floor dance system by the lower floor dance method Is the same,

In particular, the bottom plate unit 100 is installed on the abdomen rather than the upper surface of the lower flange of the steel beam, so that the space formed between the lower surface of the bottom plate unit and the upper surface of the lower flange of the steel beam is the lower floor space B. To form.

Thus, the lower floor facility space (B) is used as a space for installing a lower floor lighting system, such that the composite floor plate of the present invention can have a function that can be effectively installed in the lower floor installation.

Figures 4a and 4b in the construction of the composite bottom plate as shown in Figure 3a in particular formed of a bending plate formed of a concave portion and a convex portion, the bent plate truss deck is also provided with a lattice reinforcement of triangular pyramid shape is also provided in the concave portion Shows the case

When the deck is installed in the I-type roll beam of the present invention, a deck having a high or low dance can be installed depending on the spacing of the pillar structures.

Thus, in FIG. 4A, a bent truss deck having a relatively low dance is installed, and in FIG. 4B, a bent truss deck having a relatively high dance is installed.

As a result, when the deck having various shapes and various dances is installed according to the present invention, it is possible to design and construct a more efficient composite floor plate.

In the composite bottom plate formed lower than the upper flange of the steel beam 200 of the present invention, a plurality of supports commonly used as shown in FIG. 1C are installed on the top of the bottom plate, and the frame assembly is installed on the support top. ACCESS FLOOR can be completed by installing a floor finish plate on the floor and installing electric wires, air conditioning systems, etc. in the lower space for the access floor due to the support.

In the lower floor installation space (B) between the lower flange of the steel beam 200 and the bottom plate unit, as shown in FIG. After the installation, the ceiling assembly plate is installed in the frame assembly to enable the efficient use of the lower floor space by installing a facility system for lighting or electric wire in the lower floor installation space (B) due to the support.

According to the present invention, the composite floor plate acts as a continuous slab structure, thereby reducing the thickness of the composite floor plate, thereby enabling the design and construction of the composite floor system by the slim flow method, which is efficient and economical. It is very easy to utilize the access flow where the air conditioning equipment of the system can be installed and the space for the lower floor equipment, and it is possible to construct the composite beam of steel beams that can satisfy the functions of various floor plates.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. Those skilled in the art of the present invention can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Claims (7)

A bottom plate unit including a deck in which a through hole (web hole) is spaced from an upper surface of a lower flange or an upper surface of a lower flange of a steel beam formed in a web (abdomen), and is installed over the abdomen; A bottom plate concrete embedded to penetrate the through-holes through the through-holes (web holes) of the steel beam and continuously buried in the upper reinforcing bars in the bottom plate unit; And An access floor space (A) formed in the space between the bottom plate concrete upper surface and the upper flange of the steel beam by forming the height of forming the bottom plate concrete to be lower than the upper flange of the steel beam so that a portion of the through hole is exposed. Synthetic bottom plate structure using a steel beam formed with a through-hole in the abdomen, characterized in that to include. According to claim 1, wherein when the bottom plate unit is spread over the abdomen of the steel beam so that the bottom plate unit is installed, the space between the bottom plate unit and the lower flange of the steel beam to be used as the lower floor equipment space (B). Composite bottom plate structure using a steel beam formed with a through-hole in the abdomen, characterized in that. 3. The composite bottom plate structure using a steel beam having a through-hole formed in the abdomen according to claim 2, wherein the steel beam is an I-type beam and a roll beam having a tension bottom plate integrated with the lower flange in the longitudinal direction on the bottom surface of the lower flange. . delete A support according to claim 2, further comprising: a support in the space (A) for the access floor; A frame assembly installed on the support; An access floor system is further installed, comprising: a floor finishing plate installed on the upper surface of the frame assembly, A support in the lower space facility B; A frame assembly installed below the support; And a ceiling finishing system including a ceiling finishing plate installed on the bottom surface of the frame assembly. On the bottom surface of the lower flange, an I-shaped beam is formed with a tension bottom plate integrated with the lower flange in a longitudinal direction, and a steel beam having a through hole (web hole) formed in the web (abdomen) with a plurality of spaced apart in the longitudinal direction. Install on, A bottom plate unit including a deck disposed on the abdomen in contact with the upper surface of the lower flange of the steel beam or spaced apart from the upper surface of the lower flange, The upper reinforcing bar is installed so as to continuously reinforce the bottom plate unit while penetrating the through hole (web hole) of the steel beam, The bottom plate concrete top surface and steel beam are formed by placing the bottom plate concrete so that the upper reinforcement is buried and the through hole (web hole) is formed so that a part of the through hole is exposed to a casting height lower than the upper flange of the steel beam. Method for constructing a composite floor plate using a steel beam having a through-hole formed in the abdomen, characterized in that it comprises the step of using the space to the upper flange of the access floor space (A). A support according to claim 6, further comprising: a support in the space (A) for the access floor; A frame assembly installed on the support; Composite floor plate construction method using a steel beam having a through-hole formed in the abdomen, characterized in that the installation further comprises an access floor system comprising a; floor finishing plate installed on the upper surface to the frame assembly.

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