KR100941726B1 - Asymmetric composite beam with corrugated web - Google Patents

Abstract

The present invention relates to an asymmetric composite beam having a corrugated web, and more specifically, an upper golgol, a lower flange, and a steel cheolgolbo consisting of a web connecting the upper flange and the lower flange; A deck plate overlying the lower flange; And, the concrete poured on the deck plate; The lower flange has a width of the lower flange is greater than the width of the upper flange, the upper bent portion formed by bending both ends of the lower flange in the longitudinal direction of the cheolgolbo; And a horizontal bending part formed by horizontally bending an upper end of the upward bending part. Is provided, the web has a corrugated protrusion bent toward the front and rear of the web along the longitudinal direction of the cheolgolbo; The asymmetric composite beam is provided with a waveform web, characterized in that is provided.

In the case of constructing the structure using the present invention, it is possible to improve the resistance against buckling and torsion and to reduce the height of the structure.

In addition, in the present invention, the cheolgolbo is to be coupled to the upper flange or the lower flange, auxiliary iron for forming a bending point (drape point) of the tendon; And, tendon is seated on the auxiliary iron is a bending point (drape point) is formed; This includes, but the prestress is introduced by fixing both ends of the tendon to the outer stiffener coupled to the front or rear of the corrugated protrusions or the web located at both ends of the cheolgolbo.

Steel ball, asymmetric, prestressed, corrugated web

Description

Asymmetric composite beam with corrugated web {ASYMMETRIC COMPOSITE BEAM WITH CORRUGATED WEB}

The present invention comprises an upper flange, a lower flange, and cheolgolbo consisting of a web connecting the upper flange and the lower flange; A deck plate overlying the lower flange; And, the concrete poured on the deck plate; The lower flange has a width of the lower flange is greater than the width of the upper flange, the upper bent portion formed by bending both ends of the lower flange in the longitudinal direction of the cheolgolbo; And a horizontal bending part formed by horizontally bending an upper end of the upward bending part. Is provided, the web has a corrugated protrusion bent toward the front and rear of the web along the longitudinal direction of the cheolgolbo; The asymmetric composite beam is provided with a waveform web, characterized in that is provided.

As the size and height of the structure is progressing, various efforts have been made to promote economic construction by reducing the height of the structure.

In order to reduce the height of the conventional structure, there was a method of using a high strength structural material such as high strength concrete or high strength steel. Apart from this, however, the dance of horizontal members, which combines the dance of beams and slabs, takes up a considerable part of the total floor height, so the need to reduce the dance of the horizontal members themselves has emerged. In addition, the facility space required separately under the slab also acts as a factor to increase the height of the structure, it is necessary to consider this.

On the other hand, as a structural member for supporting the load acting in the transverse direction with respect to the longitudinal axis of the beam, in the steel frame structure or steel reinforced concrete structure, H-shaped steel or assembly beam consisting of the upper flange, the lower flange and the web is mainly used.

However, the web has a disadvantage that it is vulnerable to buckling because the cross section of the member is relatively thin. In addition, when the left and right span lengths of the edge beams or the beams adjacent to the beams are different, the torsion is likely to occur in the beam members due to an asymmetrical load. This buckling or torsion is closely related to the usability of the structure, and there is a need for a method to minimize it.

On the other hand, the beam member used for the long span needs to introduce a prestress in some cases, and the fixation of the tendon and the introduction of the camber are important problems when the prestress is introduced.

The object of the present invention created to solve the above problems is as follows.

First, it is an object of the present invention to provide an asymmetric composite beam having a corrugated web with improved buckling and torsional resistance performance.

Second, another object of the present invention to provide an asymmetric composite beam with a corrugated web that can reduce the height of the structure.

Third, another object of the present invention is to provide an asymmetric composite beam having a corrugated web that can adjust the position and location of the bending point of the steel beam according to the load and deflection shape.

The present invention to solve the above problems is an upper flange, a lower flange, and a cheolgolbo consisting of a web connecting the upper flange and the lower flange; A deck plate overlying the lower flange; And, the concrete poured on the deck plate; The lower flange has a width of the lower flange is greater than the width of the upper flange, the upper bent portion formed by bending both ends of the lower flange in the longitudinal direction of the cheolgolbo; And a horizontal bending part formed by horizontally bending an upper end of the upward bending part. Is provided, the web has a corrugated protrusion bent toward the front and rear of the web along the longitudinal direction of the cheolgolbo; It provides an asymmetric composite beam with a corrugated web, characterized in that it is provided.

In addition, the present invention is that the cheolgolbo is coupled to the upper flange or the lower flange, auxiliary iron for forming a bending point (drape point) of the tendon; And, tendon is seated on the auxiliary iron is a bending point (drape point) is formed; Included, but both ends of the tendon is fixed to the corrugated protrusions located on both ends of the cheolgolbo or the outer stiffener coupled to the front or rear of the web is provided with an asymmetric composite beam characterized in that the anchor web is formed.

According to the present invention as described above is expected the following effects.

First, when constructing a structure using the present invention is expected to improve the resistance to buckling and torsion of the web due to the corrugated web.

Secondly, in the case of using the present invention, the perforation part is utilized as a space for the equipment duct and can adjust the dance of the horizontal member, thereby reducing the height of the structure.

Third, in the case of using the present invention, the prestress can be introduced by adjusting the position and location of the drape point of the cheolgolbo according to the load and deflection shape.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

1 is a perspective view showing an embodiment of an asymmetric composite beam with a corrugated web of the present invention.

Asymmetric composite beam with a corrugated web of the present invention is the upper flange 10, the lower flange 20 and the cheolgolbo consisting of a web 30 connecting the upper flange 10 and the lower flange 20, the lower flange (20) The deck plate is placed on the top, and the concrete is poured on the deck plate.

Steel ball can be used for the assembly beam welded in the shape of H-beam or I-beam.

Here, the lower flange 20 of the cheolgolbo is characterized in that the width of the lower flange 20 is more than the width of the upper flange 10, the both ends of the lower flange 20 is formed by bending upward along the longitudinal direction of the cheolgolbo An upward bent portion 22 and a horizontal bent portion 24 formed by horizontally bending an upper end of the upwardly bent portion 22 are provided.

Here, the upward bent part 22 is bent upwardly as shown in FIG. 1 to both ends of the lower flange 20, or upwardly bent to maintain a constant inclination angle with the lower flange 20 as shown in FIG. In the case of using the cheolgolbo shown in Figure 3, since a constant gap is formed between the web 30 and the upward bent portion 22, it is easy to weld the lower flange 20 and the web 30.

At this time, the horizontal bending portion 24 facilitates the installation of steel plates such as deck plate on the upper cheolgolbo. And after installing the steel plate on the horizontal bending portion 24, the concrete is poured on the steel plate to produce a composite beam. Here concrete is poured up to the height corresponding to the thickness of the slab to the upper flange 10 of the cheolgolbo.

In addition, in the present invention, it is possible to control the dance of the horizontal member of the structure by adjusting the dance of the upward bending portion 22, it is possible to reduce the height of the structure.

On the other hand, the horizontal bending portion 24 is not only bent toward the outside of the cheolgolbo as shown in Figure 1, but also bent toward the web 30 of the cheolgolbo.

In addition, the web 30 portion of the cheolgolbo is characterized in that the corrugated protrusion 32 is bent toward the front and rear of the web 30 along the longitudinal direction of the cheolgolbo.

In this case, a cold formed steel sheet may be used to form the corrugated protrusion 32. In addition, the corrugated protrusion 32 is bent toward the front and rear of the web 30 to be advantageous in resistance to buckling or torsion.

In addition, the present invention is characterized in that the perforated portion 34 is formed by drilling the corrugated protrusion 32 as shown in FIG. In addition, the perforation part 34 may include a facility duct penetrating the perforation part 34.

That is, the web 30 includes a perforated part 34 having a shape in which a part of the corrugated protrusion 32 is perforated. The perforated part 34 is used as a facility space for installing the facility duct, thereby reducing the height of the structure. It is possible. And the perforated part 34 allows the slab rebar to penetrate the perforated part 34 to maintain continuity in some cases. In this case, the perforation part 34 may be perforated in the corrugated protrusion part 32 except for the part of the web 30 connecting the center line of the upper flange 10 and the lower flange 20.

3 is a perspective view showing an asymmetric composite beam having a corrugated web constructed by using a cheolgolbo having a pair of webs 30 formed thereon.

In FIG. 3, a pair of webs 30 are positioned to face along the longitudinal direction of the cheolgolbo so that the corrugated protrusions 32 are symmetrical to each other. Therefore, the cheolgolbo is formed with a constant space portion 36 surrounded by the wave protrusions 32 facing.

Locally in-plane compressive loads occur in the beam members due to concentrated load and point reaction. If this in-plane compressive load is large, crippling occurs due to the pressure load occurring at the point of loading. However, when manufacturing a composite beam using the cheolgolbo of the form as shown in Figure 3 can compensate for this disadvantage, the shear strength of the cheolgolbo is improved. In addition, since the shear center and the cross-sectional center coincide, it is possible to prevent the twist of the cheolgolbo.

4 also shows a longitudinal cross-sectional view of the asymmetric composite beam with a corrugated web, characterized in that it comprises a reinforcing bar 40 penetrating the perforations 34 and installed on the horizontal bent portion 24.

Reinforcing bar 40 is connected to the horizontal bent portion 24 located on the left and right relative to the web 30 to prevent deformation of the lower flange (20). Here, the reinforcing bar 40 penetrates through the perforation 34 of the web 30 to the upper portion of the horizontal bend 24. Combined.

5 is a view showing an embodiment of the present invention manufactured using a pre-stressed cheolgolbo, Figure 5 (a) is a perspective view showing an embodiment of an asymmetric composite beam having a corrugated web using a pre-stressed cheolgolbo. 5 (b) and 5 (c) are plan views thereof.

The present invention is coupled to the secondary hardware 50 for forming a bending point of the tendon 60 to the upper flange 10 or the lower flange 20 of the cheolgolbo to introduce prestress, the tendon 60 Is seated on the auxiliary iron 50 to form a bending point (drape point).

In (a) of FIG. 5, the auxiliary hardware 50 uses a c-shaped hardware, and the tendon 60 passing through the c-shaped hardware has a prestress force through a connecting hardware such as a bolt connected to the auxiliary hardware 50. Is introduced. An enlarged view of (a) of FIG. 5 shows an embodiment of tendon 60 in which prestress is introduced by auxiliary iron 50.

And both ends of the tendon (60) is an outer stiffener (52) coupled to the front or rear of the corrugated protrusion 32 (Fig. 5 (b)) or the web 30 located at both ends of the cheolgolbo (Fig. 5 (c) It is settled at)) to form the anchorage in the end of the cheolgolbo. At this time, the auxiliary hardware 50 and the outer stiffener 52 can be welded to each cheolgolbo.

In the present invention, the auxiliary hardware 50 constitutes a bending point for introducing a camber to the cheolgolbo according to the load and deflection shape.

Here, the order of introducing the prestress to the asymmetric composite beam with a corrugated web is to install the tendon 60 in the cheolgolbo to be combined with the auxiliary hardware 50, and then tension the both ends of the tendon 60 to introduce the prestress to the cheolgolbo This is done by pouring concrete. Therefore, the beam member can exhibit sufficient rigidity even in a long span.

6 is a view showing another embodiment of the present invention manufactured using a cheolgolbo introduced prestress.

In FIG. 6, the tendon 60 positioned between the fixing unit and the auxiliary hardware 50 adjacent to the fixing unit is disposed in parallel with the longitudinal direction of the cheolgolbo.

This is to solve the difficulty in working when the tension is applied to the tendon 60, when fixing both ends of the tendon 60 by using a conventional connecting hardware such as bolts and nuts.

In this case, it is preferable that the tendon 60 seated inside the auxiliary hardware 60 adjacent to the fixing device 60, that is, the auxiliary hardware 60 coupled to the upper flange, is located under the bolt.

Although the present invention has been described in connection with the preferred embodiment as mentioned above, various modifications and variations are possible without departing from the gist of the present invention, and can be used in various fields. Therefore, the claims of the present invention include modifications and variations that fall within the true scope of the invention.

1 to 6 is a view showing an embodiment of an asymmetric composite beam equipped with a waveform web of the present invention.

<Description of Major Symbols in Drawing>

10: upper flange

20: lower flange

22: upward bend

24: horizontal bend

30: web

32: waveform protrusion

34: perforation

36: space

40: rebar

50: auxiliary hardware

52: outer stiffener

60: tendon

Claims (8)

A steel ball consisting of an upper flange (10), a lower flange (20), and a web (30) connecting the upper flange (10) and the lower flange (20); A deck plate placed on the lower flange 20; And, Concrete poured over the deck plate; It consists of, The lower flange 20 is the width of the lower flange 20 is greater than the width of the upper flange 10, An upward bend portion 22 formed by bending both ends of the lower flange 20 along a length direction of the cheolgolbo; And, A horizontal bending part 24 formed by horizontally bending an upper end of the upward bending part 22; Is provided, The web 30 Corrugated protrusions 32 that are bent toward the front and rear of the web 30 along the longitudinal direction of the cheolgolbo; Asymmetric composite beams provided with a waveform web, characterized in that the provided. In claim 1, A perforation part 34 formed by perforating the corrugated protrusion part 32; Asymmetric composite beams provided with a waveform web, characterized in that it comprises a. In claim 1, Asymmetric composite beam with a corrugated web, characterized in that the pair of webs (30) to face each other so that the corrugated projection (32) is symmetric with each other. In claim 2, Reinforcing bar 40 is installed in the upper portion of the horizontal bending portion 24 through the perforation 34; Asymmetric composite beam with a corrugated web, characterized in that it comprises a. In claim 2, A facility duct penetrating the perforation portion 34; Asymmetric composite beams provided with a waveform web, characterized in that it comprises a. The method according to any one of claims 1 to 5, The steel cheolgolbo is coupled to the upper flange 10 or the lower flange 20, the auxiliary hardware 50 for forming a bending point (drape point) of the tendon (60); And, tendon (60) is seated at the position of the auxiliary hardware (50) to form a bending point (drape point); This includes, Both ends of the tendon 60 is fixed to the corrugated protrusions 32 or the outer stiffeners 52 coupled to the front or rear of the web 30 located at both ends of the cheolgolbo to form the anchorage. Equipped asymmetric composite beams. In claim 6, Tendon (60) located between the anchorage and the auxiliary hardware 50 adjacent to the anchorage is asymmetric composite beam with a corrugated web, characterized in that parallel to the longitudinal direction of the cheolgolbo. In claim 6, The auxiliary iron 50 is asymmetric composite beam having a corrugated web, characterized in that it is installed to introduce a camber (camber) in the cheolgolbo.

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