KR102330715B1 - Method for menufacturing asymmetry beam having web holes and lengthened web-height and structure system including composite beam - Google Patents

Abstract

The present invention relates to an asymmetric beam with web holes and an elongated web height, a method for manufacturing the asymmetric beam, and a structure system including a beam structure including the asymmetric beam and a composite beam. According to one embodiment of the present invention, the asymmetric beam with web holes and an elongated web height comprises: an upper body comprising an upper flange and an upper web, the upper web having multiple upper grooves formed thereon; a lower body comprising a lower flange and a lower web, the lower web having multiple lower grooves formed thereon; and multiple web holes that are formed by matching the upper grooves and the lower grooves on a bonding web, which is formed by welding the upper web and the lower web, wherein the lower flange is longer than the upper flange in width. Further, a method for manufacturing the same and a structure system including a beam structure including the same and a composite beam are proposed.

Description

Structural system including a web hole and an asymmetric section steel manufacturing method having an elongated web height and a composite beam

The present invention relates to an asymmetrical section, a manufacturing method thereof, a beam structure including an asymmetrical section, and a structural system including a composite beam. Specifically, an asymmetric section having a web hole and an elongated web height, a method of manufacturing an asymmetric section having a web hole and an elongated web height, a beam structure including a web hole and an asymmetric section having an elongated web height, and a web hole and A structural system comprising a composite beam comprising an asymmetrical section having an elongated web height.

A beam is a major structural member used in structures such as building structures and bridge structures. Cheolgolbo is widely used in these structures. However, as the span of Cheolgolbo becomes longer, problems such as deflection due to bending may occur. In order to solve this problem, the use of composite beams is increasing, in which the concrete is borne by most of the compressive stress and the tensile stress is borne by the steel when it receives a bending moment by implementing the cheolgol beam and concrete to behave as a single member.

Cheolgolbo used for composite beams or used on its own will increase the web height to prevent problems such as deflection due to bending so that it can be used for long spans. However, in the case of conventional rolled steel, the web height is already standardized, so there is a limit to using it for a long span suitable for the construction situation, or the cost is too high. In the case of conventional rolled steel, the web height is standardized and cannot be easily increased.

On the other hand, the web of the existing rolled steel used as a steel beam is made of a plate, and there is a surplus in shear strength during structural design, and as the height of the web increases, it becomes a wasted element in structural design.

Republic of Korea Patent Publication No. 10-1547540 (Registered on August 20, 2015) Republic of Korea Patent Publication No. 10-1804557 (registered on November 28, 2017) Republic of Korea Patent Publication No. 10-0851490 (registered on August 4, 2008)

The present invention intends to implement an asymmetrical section having a web hole and an elongated web height that can be easily applied to a long span by increasing the web height compared to the conventional asymmetric section. In addition, it is intended to implement a structural system including a beam structure including such asymmetrical steel and a composite beam.

To this end, the existing symmetrical sections with different flange lengths are cut and welded with cut sections with different flange lengths to improve the web height and at the same time to have a web hole and an asymmetric section steel having a web hole and an elongated web height, and a method for manufacturing the same , to propose a structural system including composite beam structures and composite beams.

In order to achieve the above object, according to one aspect of the present invention, the upper body consisting of an upper flange and an upper web, a plurality of upper grooves are formed on the upper web; a lower body comprising a lower flange and a lower web and having a plurality of lower grooves formed on the lower web; and a plurality of web holes formed by matching each of the upper and lower grooves on the joining web formed by welding the upper web and the lower web, characterized in that the width of the lower flange is longer than the width of the upper flange Asymmetrical sections with web holes and elongated web heights are proposed.

In this case, the upper body may be formed of an upper flange and an upper web from which the first symmetrical rolled section steel is cut, and the lower body can be made of a lower flange and a lower web from which the second symmetrical rolled section steel is cut. In addition, the shape of the web hole is a trapezoid, a rectangle, a trapezoid or a chamfered structure of a rectangle, or a hexagon, a rectangle, a trapezoid or a rectangular chamfered structure in which the shapes of the upper and lower grooves made of a semicircle or a semi-ellipse are matched. Alternatively, it may be formed in a circular or oval shape.

In addition, in one example, the thickness of the upper web and the lower web is the same, and the lengths of the protruding ends of the upper body and the lower body are identically matched to form a web hole by the upper groove and the lower groove, and the upper and lower portions of the web hole Each of the upper body and the lower body can be obtained by cutting the web of the rolled section steel into a continuous concave-convex structure with the same height between the cut mountains and valleys so as to have a web elongation effect by half of the height difference.

Next, in order to achieve the above object, according to another aspect of the present invention, one or two or more webs of rolled steel are cut into a concave-convex structure, the upper flange and a plurality of upper grooves formed according to the cut are provided Obtaining each of the lower body consisting of an upper body made of an upper web, a lower flange having a width longer than the width of the upper flange, and a lower web having a plurality of lower grooves formed by cutting; And by welding the upper web and the lower web so that the upper groove of the upper body and the lower groove of the lower body are matched, respectively, a bonding web having a height longer than the height of each of the webs of the rolled steel is formed, the upper groove and Including the step of forming an asymmetric section having a web hole and an elongated web height so that each of the lower grooves includes a plurality of web holes formed by matching, in the step of obtaining each of the upper body and the lower body, one asymmetric rolling Obtaining an upper body and a lower body from the section steel, or cutting the first web of the first symmetrical rolled section steel into a concave-convex structure to obtain the upper body, and a second symmetrical rolling having a flange width longer than the flange width of the first symmetrical rolled section steel An asymmetric section steel manufacturing method having a web hole and an elongated web height is proposed, characterized in that the lower body is obtained by cutting the second web of the section steel into a concave-convex structure.

At this time, in one example, in the step of obtaining each of the upper body and the lower body, the shape of each of the upper and lower grooves is a trapezoid, a rectangle, a trapezoid or a chamfered structure of a rectangle, or a semicircle to a semi-ellipse. The lengths of the protruding ends of the sieve and the lower body are cut to be identically matched, and the shape of the upper and lower grooves are matched in the step of forming an asymmetric section. Alternatively, a web hole having a circular or oval shape may be formed on the coupling web.

In addition, in one example, when obtaining each of the upper body and the lower body from different symmetrical rolled steels, the thicknesses of the first web and the second web are the same, and the height (H) of the bonding web formed in the step of forming the asymmetrical steel ) is obtained according to the following formula,

과

각각은 상부홈과 하부홈 각각의 깊이일 수 있다.At this time, h ₁ and h ₂ each is the height of each of the first web and the second web,

class

Each may be the depth of each of the upper groove and the lower groove.

In addition, in order to achieve the above object, according to another aspect of the present invention, in the structure used for the composite beam structure, the asymmetry having the web hole and the elongated web height according to any one of the examples of the above-mentioned asymmetric section steel. section steel; and an asymmetric section, characterized in that it forms a partially open filling space together with the upper or lower flange and the bonding web of the asymmetric section, and comprises a space cover plate for supporting the slab deck to the PC slab during construction of the structure. A beam structure is proposed.

In this case, the space cover plate may have a structure in which one end is joined to the lower flange and protrudes in the direction of the upper flange, and then the other end is bent to be spaced apart from the coupling web at a height lower than the upper flange.

In addition, the structure may further include a plate support for supporting the space cover plate in the filling space to be filled with concrete during construction so that the space cover plate can support the slab deck or the PC slab during construction. In another example, the structure includes a concrete or Styrofoam filler pre-filled in the filling space so that the space cover plate can support the slab deck or the PC slab during construction, and the space cover plate to enable the restraint of the filler by the space cover plate. It may further include a restraint support for supporting the.

In addition, in one example, each end of the space cover plate is joined to the coupling web and protrudes laterally from the upper flange in the coupling web, and then is bent to the outer upper side of both ends of the upper flange to form a filling space, and the structure is The space cover plate may further include a restraint support for connecting and supporting the space cover plate and the upper flange to enable restraint of the concrete to be filled in the filling space or to be filled during construction in advance by the space cover plate.

Next, in order to achieve the above object, in accordance with another aspect of the present invention, in a structural system including a composite beam, a plurality of installed between columns or beam supports and forming a part of the composite beam as described above An asymmetric section having a web hole and an elongated web height according to any one of the examples; A plurality of slab decks or PC slabs connected in parallel between the asymmetrical beams for slab concrete pouring, and the lower ends of each end are directly supported by the asymmetrical beams or through a support medium; and reinforced concrete poured on top of the asymmetric section and the slab deck or PC slab, wherein some concrete of the reinforced concrete is integrally filled in the space between the bonding web of the asymmetric section and the end of the slab deck to the end of the PC slab or of the asymmetric section A structural system including a composite beam is proposed, in which a part of the perimeter is precast concrete to form a part of the composite beam together with the asymmetrical steel beam.

At this time, the slab deck to the PC slab are supported directly on the lower flange of the asymmetrical section or through a support medium, and each end of the support medium is joined to the lower flange and partially opened together with the lower flange and the joining web of the asymmetrical steel. It includes a space cover plate that forms a filling space and supports the slab deck to the PC slab, and the space cover plate protrudes in the direction of the upper flange of the asymmetrical section and then is bent at a height lower than the upper flange to be spaced apart from the side of the joining web, Some concrete of reinforced concrete is filled together in the fill space and the space between the joining web and the end of the slab deck to the PC slab, or the filling space is filled with the upper part of the pre-filled filler and the space between the joining web and the end of the slab deck to the PC slab is asymmetrical It can form part of a composite beam together with the section steel.

At this time, in another example, the support medium directly supports the space cover plate in the filling space or supports the space cover plate to constrain the filling material, so that the space cover plate supports the slab deck or the PC slab. Including, the filler may be a concrete or Styrofoam filler.

Also in one example, the multiple connection structure of the slab deck has a plurality of protrusions having an upper flat surface and a plurality of concave portions having a bottom flat surface narrower than the upper flat surface width are alternately continuous, In the groove portion or between the projection portion and the wall surfaces of the groove portion are partially overlapped and connected side by side, the plate cross-section of each slab deck is partially overlapped with the neighboring slab deck on at least one groove portion and the outermost both sides of the projection portion forming the projection or at least one or more protrusions and a groove portion overlapping with the neighboring slab deck on the outermost both sides to form a concave portion, or at least one or more protrusions, at least one or more concave portions, and neighboring slab decks and protrusions on the outermost both sides It has a structure including a wall part partially overlapped between the wall surfaces of the recess, the slab deck includes vertical reinforcement installed vertically along the recess, and the reinforced concrete poured into the recess is asymmetric with respect to the slab structure between the asymmetric beams It can serve as an auxiliary beam perpendicular to the

At this time, in another example, the plate of the slab deck is bent to form the upper part of the plate cross-section, is in contact with the reinforced concrete, and passes through the deck top plate, which forms a part of the slab structure, and a plurality of exposed holes exposing the reinforced concrete and a temporary member coupled to the lower deck upper plate to block the exposure hole and removed after the concrete is poured or cured, and the temporary member may be made of plastic, film or paper, or a material containing a magnetic material.

In another example, each end of the support medium is joined to the joining web of the asymmetric section, protruding laterally from the joining web from the upper flange of the asymmetric section, and then bent upwards at both ends of the upper flange to fill the space. A space cover plate that forms and supports the slab deck or PC slab and a space cover plate that connects and supports the upper flange and the space cover plate so that the concrete to be filled in the filling space in advance or to be filled during construction can be constrained by the space cover plate, and reinforcing bars A part of concrete can be filled in the filling space during construction or filled in the top of the precast concrete pre-filled in the filling space and the upper flange between the slab deck and the PC slab to form a part of the composite beam together with the asymmetric section steel.

At this time, in another example, the other end side of the space cover plate is connected to the support and provided with a deck support for supporting the slab deck or the PC slab, and the deck support is rebent from both ends of the upper flange to the outside. The precast concrete can be constrained by allowing some concrete of the concrete to be filled with the filling space, or by re-bending to be spaced apart from both ends of the upper flange inward.

In addition, in one example, the support medium may be removed after concrete curing as a temporary support installed in close contact with both sides of the bonding web on the lower flanges on both sides of the bonding web.

Besides, in one example. The slab deck is a temporary fixture and can be removed after the concrete has cured.

According to one embodiment of the present invention, it is possible to significantly improve the web height of the asymmetrical steel section using the existing symmetrical section while reducing the cost. Accordingly, it is possible to obtain a cheolgolbo that can be easily applied even in a long span.

According to one example of the present invention, the web height can be significantly improved to be easily applied to a long span structure, the cost can be significantly reduced compared to the existing ready-made products, and asymmetrical sections of various web height sizes can be easily manufactured.

For example, when an asymmetrical section is used for a beam such as a long span, the web height should be increased as the length increases. can significantly elongate the web height. In addition, since the web of the existing rolled section steel has sufficient shear strength margin, as in one example of the present invention, there is no problem in shear strength even if a hole is partially provided, but rather, the weight is reduced or reinforcing bars are formed in the web when the slab is reinforced. It can have the advantage that the concrete on both sides can be integrally formed through the hole or through the hole formed in the web.

According to various embodiments of the present invention, it is apparent that various effects not directly mentioned may be derived by those of ordinary skill in the art from various configurations according to the embodiments of the present invention.

1 is a diagram schematically showing a web hole and an asymmetric section having an elongated web height according to an embodiment of the present invention.
Figures 2a and 2b each is a schematic view of a cutting state of a symmetrical steel section for the manufacture of an asymmetric section having a web hole and an elongated web height according to another embodiment of the present invention.
3 is a view schematically showing a cross-section of a beam structure including an asymmetric section according to another embodiment of the present invention.
4 is a view schematically showing a cross-section of a beam structure including an asymmetric section according to another embodiment of the present invention.
5a and 5b are views schematically showing a cross-section and construction of a beam structure including an asymmetrical steel beam according to another embodiment of the present invention, respectively.
6 is a diagram schematically showing a partial cross-section of a structural system including a composite beam according to another embodiment of the present invention.
7A and 7B are views schematically showing a slab deck used in a structural system including a composite beam according to an embodiment of the present invention, respectively.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention for achieving the above object will be described with reference to the accompanying drawings. In this description, the same reference numerals mean the same components, and in order to facilitate the understanding of the present invention to those of ordinary skill in the art, the secondary description may be omitted.

In the present specification, unless there is a limitation of 'directly' in connection, coupling, or arrangement relationship of one component with another component, not only the form of 'directly connected, coupled or arranged', but also another component is interposed between them. It may also exist in a form in which it is connected, combined, or arranged.

It should be noted that, although a singular expression is described in this specification, it may be used as a concept representing the whole of a plurality of components unless it is contrary to the concept of the invention or is clearly different or contradictory. In the present specification, descriptions such as 'comprising', 'having', 'comprising', 'comprising' and the like should be understood as the possibility of the presence or addition of one or more other elements or combinations thereof.

In the present specification, expressions such as 'first' to 'second' should be understood as being attached to express the configuration that each of them refers to is different from other configurations.

The drawings referenced in this specification are examples for explaining an embodiment of the present invention, and the shape, size, thickness, etc. may be exaggerated or reduced for an effective description of the technical characteristics of each configuration.

[Asymmetrical section with web hole and elongated web height]

First, an asymmetric section having a web hole and an elongated web height according to an aspect of the present invention will be described with reference to FIG. 1 . In addition, in understanding the asymmetric section having a web hole and an elongated web height according to an example of the present invention, embodiments of a method for manufacturing an asymmetric section according to an example of the present invention to be described later as well as the description to be described later and FIG. 2a and 2b may be referred to.

1 is a diagram schematically showing a web hole and an asymmetric section having an elongated web height according to an embodiment of the present invention.

Referring to FIG. 1 , the asymmetric section 10 according to one example has a web hole 15 and an elongated web height. For example, in the case of using the asymmetric section steel 10 for a beam such as a long span, the web height should be increased as the length becomes longer. In addition, since the web of existing rolled steel has sufficient shear strength margin, there is no problem in shear strength even if partially provided with a hole. Through this, it can have the advantage that the concrete on both sides can be integrally formed. Accordingly, the present invention proposes a web hole 15 and an asymmetric section steel 10 having an elongated web height. By elongating the web height according to this embodiment of the present invention, it can be easily applied to a long span structure, and furthermore, the cost can be significantly reduced compared to the existing ready-made products, and asymmetrical sections of various web height sizes can be easily obtained. In addition, as will be described later, the shape of the web hole 15 can be manufactured in various ways, so it can have an advantage from a design point of view.

At this time, referring to FIG. 1 , the asymmetric section 10 having a web hole and an elongated web height according to an example includes an upper body 11 , a lower body 12 and a plurality of web holes 15 , and have. The upper body 11 consists of an upper flange 11a and an upper web 13a. For example, the upper body 11 can be obtained by cutting an existing symmetrical steel section, for example, the symmetrical rolled section steel (10a, 10b). The upper body 11 may be obtained by cutting the symmetrical rolled steels 10a and 10b, and the upper body 11 and the lower body 12 may be simultaneously obtained by cutting the asymmetrical steel.

For example, referring to FIG. 2A , the upper body 11 having the upper flange 11a and the upper web 13a can be obtained by cutting the existing symmetrical rolled steel 10a to have an uneven structure on the web. The lower body 12 to be described later is also the same. A plurality of upper grooves 15a are formed on the upper web 13a of the upper body 11 . At this time, each of the upper grooves 15a is matched with each of the lower grooves 15b formed on the lower web 13b of the lower body 12 to be described later and forms a web hole 15 on the coupling web 13 .

For example, the upper body 11 may include an upper flange 11a and an upper web 13a from which the first symmetrical rolled steel 10a is cut. At this time, the flange width of the first symmetrical rolled section steel 10a is smaller than the flange width of the second symmetrical rolled section steel 10b to be described later.

Referring to FIG. 1 , the lower body 12 includes a lower flange 12b and a lower web 13b. For example, similarly to the manufacturing method of the upper body 11, for example, the lower body 12 can be obtained by cutting (a') the symmetrical rolled steel 10b, and FIG. 2B shows one example. Although not shown, the lower body 12 may be obtained together with the upper body 11 by cutting the asymmetrical steel. A plurality of lower grooves 15b are formed on the lower web 13b of the lower body 12 . The lower groove 15b may be formed by cutting (a') a web of, for example, a symmetrical rolled steel 10b into a concave-convex structure like the upper groove 15a. At this time, the width of the lower flange 12b of the lower body 12 is longer than the width of the upper flange 11a of the upper body 11 to form the asymmetric section steel 10 .

For example, the lower body 12 may include a lower flange 12b and a lower web 13b from which the second symmetrical rolled steel 10b is cut.

Continuing to refer to Figure 1, a plurality of web holes 15 is a bonding web formed by welding the upper web (13a) of the upper body (11) and the lower web (13b) of the lower body (12) are welded (a). On (13), the upper groove (15a) and the lower groove (15b) are formed to match each other. In Fig. 1, reference numeral 'a' denotes a welding surface, and the upper web 13a of the upper body 11 and the lower web 13b of the lower body 12 are welded together with the mountains (protruding ends) of the concave-convex structure. The upper web (13a) and the lower web (13b) are coupled to form a coupling web (13) is formed, and at this time, the valleys (grooves) of the concave-convex structure of the upper web (13a) and the lower web (13b) meet each other and the web hole (15) this is formed For example, the length between the flat portion length of the upper and lower portions of the web hole 15 and the web hole 15 to be welded may be the same.

For example, the lengths of the protruding ends of the upper body 11 and the lower body 12 may be identically matched to form the web hole 15 by the upper groove 15a and the lower groove 15b.

For example, referring to FIGS. 1, 2a and 2b, the shape of the web hole 15 is a trapezoid, a rectangle, a trapezoid or a chamfered structure of a rectangle, or an upper groove 15a of the upper body 11 made of a semi-circle or a semi-ellipse. And the shape of the lower groove (15b) of the lower body 12 may be made of a matching shape of a hexagonal, quadrangular, trapezoidal or rectangular chamfered structure, or a circular or oval shape. 1 and 2a, the upper groove 15a of the upper body 11 and the lower groove 15b of the lower body 12 form a hexagonal web hole 15, and in FIG. 2B, the lower body 12 Although only the lower groove 15b of ) is shown, it can be combined with the upper body 11 having the upper groove 15a of the same shape to form a web hole 15 of a rectangular shape. In addition, although not shown, in FIGS. 1, 2a and/or 2b, the corner where the flat portion of the groove bottom of each of the upper groove 15a and the lower groove 15b meets the side surface and the flat portion of the protruding end are chamfered to the same standard. The web hole 15 can be formed by cutting the symmetrical section steel. At this time, in the chamfering method, the web hole 15 can be formed on the coupling web 13 through welding by performing cutting of the symmetrical section as if the chamfering was performed in an oblique or curved shape. In addition to the shape of the web hole 15 mentioned above, a web hole 15 having a different shape is also possible.

For example, in one example, the thickness of the upper web 13a of the upper body 11 and the lower web 13b of the lower body 12 may be the same. During actual manufacturing, there may be a slight difference in the thickness of the upper web 13a and the lower web, and the thickness of the upper web 13a may be slightly smaller than the thickness of the lower web 13b according to the structural calculation.

In one example, each of the upper body 11 and the lower body 12 cut the web of the rolled steel so as to have a web elongation effect by half of the height difference between the upper and lower parts of the web hole 15. It can be obtained by cutting into a concave-convex structure.

[Method for manufacturing asymmetrical steel with web hole and elongated web height]

Next, a method for manufacturing an asymmetric section having a web hole and an elongated web height according to an aspect of the present invention will be described with reference to the drawings. At this time, reference may be made to the embodiments of the asymmetrical section having a web hole and an elongated web height according to the example of the present invention and FIG. 1 , and in this case, overlapping descriptions may be omitted.

Figures 2a and 2b each is a schematic view of a cutting state of a symmetrical steel section for the manufacture of an asymmetric section having a web hole and an elongated web height according to another embodiment of the present invention. In addition, FIG. 1 is a view schematically showing an asymmetric section steel manufactured according to the method for manufacturing an asymmetric section steel having a web hole and an elongated web height according to an embodiment of the present invention.

1, 2a and 2b, the method for manufacturing an asymmetric section having a web hole and an elongated web height according to an example includes the process of obtaining the upper body 11 and the lower body 12, respectively, and the upper body 11 ) and the lower body 12 are welded together to form an asymmetric section steel 10 . 2a and 2b show the appearance of obtaining each of the upper body 11 and the lower body 12, at this time the concave-convex structure cut surface (reference numeral a') shown in FIG. 2A and the concave-convex structure cut surface ( Reference numeral a') indicates that it can be cut into concave-convex structures of different shapes, and the upper body 11 having the upper flange 11a and the upper web 13a obtained in FIG. 2A and the lower flange 12b obtained in FIG. 2B ) and the lower body 12 having the lower web 13b are not welded to each other. The asymmetric section 10 shown in FIG. 1 is obtained by cutting a web from one asymmetric section to a concave-convex structure to obtain each of the upper body 11 and the lower body 12, and then the upper web 13a of the upper body 11. And it may be understood as showing a state obtained by welding the lower web (13b) of the lower body (12).

First, the steps of obtaining each of the upper body 11 and the lower body 12 will be described. At this time, one or two or more webs of rolled steel are cut into a concave-convex structure to obtain an upper body 11 and a lower body 12, respectively. The upper body 11 is obtained by cutting the web in a concave-convex structure, the upper flange 11a and the upper web 13a having a plurality of upper grooves 15a formed according to the cut. In addition, by cutting along the web in an uneven structure, the lower body 12 consisting of a lower flange 12b and a lower web 13b having a plurality of lower grooves 15b formed according to the cut is obtained. At this time, the width of the lower flange 12b of the lower body 12 is longer than the width of the upper flange 11a of the upper body 11 .

At this time, in the step of obtaining each of the upper body 11 and the lower body 12, each of the upper body 11 and the lower body 12 is obtained from one asymmetric rolled section steel, or the first symmetrical rolled section steel 10a The upper body 11 is obtained by cutting the first web of cut to obtain a lower body 12 . For example, the process of obtaining each of the upper body 11 and the lower body 12 from one asymmetrical rolled steel is not directly shown, but the upper body 11 and the lower body 12 shown in FIG. 1 are asymmetrical. It may be understood as forming the asymmetric section steel 10 by welding the protrusions of the cut web after the obtained by cutting into a concave-convex structure along the web of the rolled section steel. Alternatively, as shown in FIGS. 2A and 2B, the upper body 11 is obtained by cutting the first web of the first symmetrical rolled section steel 10a into a concave-convex structure, and the second web of the second symmetrical rolled section steel 10b is cut The lower body 12 is obtained by cutting into a concave-convex structure, but by welding the upper body 11 and the lower body 12 having matching upper and lower grooves 13a and 13b, respectively, as shown in FIG. It is also possible to form an asymmetric section (10).

For example, in the step of obtaining each of the upper body 11 and the lower body 12, each of the upper body 11 and the lower body 12 is obtained from one asymmetric rolled section steel, or the upper body ( 11) and the lower body 12 are obtained, respectively, and the upper body 11 and the lower body 12 are welded to each other to form the asymmetric section steel 10, thereby minimizing wasted or wasted web fragments in the manufacturing process. can

For example, the process of acquiring the upper body 11 and the process of acquiring the lower body 12 will be described separately with reference to FIGS. 2A and 2B , respectively. Referring to Figure 2a, in the process of obtaining the upper body 11, the first web of the first symmetrical rolled section steel 10a is cut into a concave-convex structure, and the upper flange 11a and a plurality of upper grooves formed according to the cut ( An upper body 11 made of an upper web 13a provided with 15a) is obtained. At this time, one first symmetrical rolled section steel 10a is cut into a concave-convex structure to obtain two upper bodies 11 having the same shape. The uneven cut structure in FIG. 2A shows a cut structure for forming the hexagonal web hole 15 as in FIG. 1 . Figure 2a shows the cutting of the first web of the first symmetrical rolled section steel 10a in an uneven structure to obtain the upper body 11, but the lower body 12 for welding the upper body 11 and It can also be obtained by cutting the second symmetrical rolled section steel 10b in the same manner. Referring to Figure 2b, in the process of obtaining the lower body 12, the second web of the second symmetrical rolled section steel (10b) having a longer flange width than the flange width of the first symmetrical rolled section steel (10a) as a concave-convex structure By cutting, the lower body 12 is obtained, which consists of a lower flange 12b and a lower web 13b provided with a plurality of lower grooves 15b formed according to the cut. In FIG. 2B , two lower bodies 12 of the same shape may be obtained by cutting the second symmetrical rolled section steel 10b into a concave-convex structure. In the same manner as in the concave-convex structure cutting method shown in FIG. 2B, the upper body 11 obtained by cutting the first asymmetrical steel 10 is welded to the lower body 12 obtained according to FIG. 2B to form a rectangular web hole 15 ) can be manufactured having an asymmetrical section (10).

Subsequently, referring to FIG. 1 , in the step of forming the web hole 15 and the asymmetric section steel 10 having the elongated web height, the upper groove 15a of the upper body 11 and the lower body 12 of the By welding the lower groove (15b) to match the upper web (13a) and the lower web (13b) (a), the first and second joining webs 13 having a height longer than the height of each of the webs are formed. At this time, the asymmetric section steel 10 is formed so that a plurality of web holes 15 formed by matching each of the upper groove 15a and the lower groove 15b on the coupling web 13 are included, and the formed asymmetric section steel 10 is formed. has a web hole 15 and an elongated web height.

As in the above description, referring to FIGS. 1, 2A and/or 2B, the shape of the upper groove 15a and the lower groove 15b in the step of obtaining each of the upper body 11 and the lower body 12, respectively. is a trapezoid, a rectangle, a trapezoid or a chamfered structure of a rectangle, or a semicircle to a semi-ellipse, but the length of the protruding ends of the upper body 11 and the lower body 12 can be cut to match the same. In FIG. 2A , the upper groove 15a of the same shape is cut to have a trapezoidal shape. In FIG. 2B , the lower groove 15b of the same shape is cut to have a rectangular shape. 2a and 2b each is to obtain two each of the upper body 11 and the lower body 12 of the same shape, the grooves formed on the web cut into the concave-convex structure are all upper grooves 15a in FIG. 2A and In FIG. 2B , it may be understood as the lower groove 15b. For example, when cutting to have a trapezoidal or rectangular chamfered structure in the shape of each of the upper groove 15a and the lower groove 15b, the corner forming portion of the expected trapezoidal or rectangular shape of the portion forming the groove by one continuous cutting may be cut to be chamfered in a straight or curved shape, but is not limited thereto. For example, an octagonal web hole 15 may be formed by matching the upper groove 15a and the lower groove 15b obtained through a rectangular chamfer structure. For example, when cutting so that the shape of each of the upper groove 15a and the lower groove 15b is made in a semi-circle to a semi-ellipse, for example, after cutting the rectangular shape of the basic concavo-convex structure, additional cutting for the portion forming the groove is performed in a semi-circle to half Form an elliptical structure or reverse the order to cut the part forming the groove during the first cut into a semi-circle or semi-elliptical structure, and then perform additional cutting so that the welding surface of the protruding portion to be welded later is flat, but not limited thereto does not

Referring to Figure 1, in the step of forming the asymmetrical steel 10, the shapes of the upper groove (15a) and the lower groove (15b) are matched hexagonal, square, trapezoidal to rectangular chamfered structure matching shape, or circular to A web hole 15 made of an oval may be formed on the coupling web 13 . Referring to FIGS. 1 and 2A , it is shown for forming a hexagonal web hole 15 , and FIG. 2B shows that for forming a rectangular web hole 15 . For the matching shape of the trapezoidal or rectangular chamfer and the chamfer structure, refer to the description in the above-described embodiment of the asymmetrical steel section.

For example, in the case of obtaining each of the upper body 11 and the lower body 12 by cutting webs of different symmetrical rolled section steels in the process of obtaining the upper body 11 and the lower body 12, the first symmetrical rolled section steel The thickness of the first web of (10a) and the second web of the second symmetrical rolled section steel (10b) may be the same.

For example, each of the upper body 11 and the lower body 12 cuts the web of the rolled steel so as to have a web elongation effect by half of the height difference between the upper and lower parts of the web hole 15. It can be obtained by cutting. That is, in the step of obtaining the upper body 11, the first symmetrical rolled section steel 10a is cut so that the heights of the mountains and valleys on both sides of the cut are the same, and in the step of obtaining the lower body 12, the second symmetrical rolled section steel It can be cut so that the heights of the mountains and valleys on both sides of the cut in (10b) are the same. At this time, the height difference between the peaks and valleys of the upper body 11 and the height difference between the peaks and valleys of the lower body 12 may be the same or different from each other. However, it is sufficient if the length of the flat portion of the mountain (protruding end) of the upper body 11 to be welded and the flat portion of the mountain (protruding end) of the lower body 12 are substantially equal to each other.

For example, the height H of the bonding web 13 formed in the step of forming the asymmetric section 10 may be obtained according to the following equation.

과

각각은 상부홈(15a)과 하부홈(15b) 각각의 깊이일 수 있다.At this time, h ₁ and h ₂ each is the height of each of the first web and the second web,

class

Each may be the depth of each of the upper groove (15a) and the lower groove (15b).

According to this embodiment of the present invention, it is possible to easily obtain an asymmetrical section with an elongated web height, thereby obtaining an asymmetrical section that can be easily applied to a long span structure, and furthermore, it is possible to significantly reduce the cost compared to the existing ready-made products, and various web heights It is easy to obtain an asymmetrical section of size. In addition, as described above, the shape of the web hole 15 can be manufactured in various ways, so it can have an advantage from the design point of view of the facility in which the asymmetrical section is exposed.

[Beam structure including asymmetrical steel]

Next, a beam structure including an asymmetrical steel according to an aspect of the present invention will be looked at with reference to the drawings. At this time, reference may be made to the embodiments of the asymmetrical section having a web hole and an elongated web height according to the example of the above-described invention and FIGS. 1A to 2B , and overlapping descriptions may be omitted.

3 is a view schematically showing a cross-section of a beam structure including an asymmetric section according to another embodiment of the present invention, and FIG. 4 is a beam structure including an asymmetric section according to another embodiment of the present invention. It is a view schematically showing a cross-section, and FIGS. 5A and 5B are views schematically showing a cross-section and a construction state of a beam structure including an asymmetrical steel according to another embodiment of the present invention, respectively.

1 , 3 , 4 , 5A and/or 5B , in one example, the structure used for the composite beam structure is the beam structure 1a , 1b , 1c , 1d including the asymmetrical steel 10 . In this case, the beam structures 1a, 1b, 1c, and 1d including the asymmetric section 10 include the asymmetric section 10 and the space cover plates 21a and 21b. The asymmetric section 10 is an asymmetric section 10 having a web hole and an elongated web height according to any one of the examples of the asymmetric section described above. At this time, it will be understood with reference to the above-described examples of the invention. At this time, in FIGS. 3 and 4, the web hole 15 is cut together in the middle of the coupling web 13 of the asymmetric section 10, and in FIGS. 5a and 5b, the coupling web 13 of the asymmetric section 10 is shown in FIGS. The upper web (13a) and the lower web (13b) of the projecting portion shows a cross-section of the welded portion. On the other hand, in FIG. 6, the structure as shown in FIG. 3 shows that the web hole 15 on the coupling web 13 is filled with the concrete 50 according to the concrete pouring after construction.

Next, referring to FIGS. 3, 4, 5a and/or 5b, the space cover plates 21a and 21b are partially together with the upper or lower flanges 11a, 2b and the coupling web 13 of the asymmetrical section 10. to form an open filling space (S). In addition, the space cover plate (21a, 21b) supports the slab deck to the PC slab (30) during the construction of the beam structure (1a, 1b, 1c, 1d) including the asymmetrical steel (10). In FIGS. 3 and 4 , the space cover plate 21a forms a filling space S together with the lower flange 12b and the coupling web 13 of the asymmetrical section 10, and in FIGS. 5A and 5B , the space It is shown that the cover plate 21b forms a filling space S together with the upper flange 11a and the coupling web 13 of the asymmetrical steel 10 . In addition, in FIGS. 3 and 4 , the slab deck or PC slab 30 indicated by a dotted line is supported on the space cover plate 21a of the beam structures 1a and 1b including the asymmetrical steel 10, and FIG. In 5a and 5b, on the space cover plate 21b of the beam structures 1c and 1d including the asymmetrical section 10, the slab deck or PC slab 30 indicated by the dotted line is supported and reinforced concrete ( 50) has been constructed.

For example, referring to FIGS. 3 and/or 4 , each end of the space cover plate 21a is joined to the lower flange 12b of the asymmetric section 10 and the upper flange 11a of the asymmetric section 10 in the direction. After protruding, the other end may be bent to be spaced apart from the coupling web 13 side of the asymmetric section 10 at a height lower than the upper flange 11a. As shown in Figures 3 and 4, each of the space cover plate (21a) may be joined to each end portion of the lower flange (12b) on both sides (based on the web).

At this time, referring to FIG. 3 , in one example, the beam structure 1a including the asymmetrical steel 10 may further include a plate support 21a. The plate support 21a is a space cover plate 21a inside the filling space S to be filled with concrete 50 during construction so that the space cover plate 21a can support the slab deck or the PC slab 30 during construction. support For example, it is possible to support the space cover plate 21a by arranging the plate pieces between the lower flange 12b and the lower portion of the bent portion on the side of the coupling web 13 of the space cover plate 21a at a predetermined interval or a rare occasion. Alternatively, although not shown, both ends of a bar-shaped plate support similar to the restraint support 23b of FIG. 4 are coupled on the coupling web 13 side with the bent portion of the space cover plate 21a on the coupling web 13 to space The cover plate 21a may be supported, but the present invention is not limited thereto.

As another example, referring to FIG. 4 , the beam structure 1b including the asymmetrical steel 10 may further include a filler 25 and a restraint support 23b pre-filled in the filling space S. The filler 25 is pre-filled in the filling space S so that the space cover plate 21a can support the slab deck or the PC slab 30 during construction. For example, the filler 25 may be a concrete or Styrofoam filler 25, but is not limited thereto. The restraint support 23b supports the space cover plate 21a to enable restraint of the filler 25 pre-filled before construction by the space cover plate 21a.

Referring to another example with reference to FIGS. 5A and/or 5B, each end of the space cover plate 21b is joined to the joining web 13 of the asymmetric section 10, and the asymmetric section steel laterally in the joining web 13. After protruding from the upper flange (11a) of (10), both ends of the upper flange (11a) can be bent upward to form a filling space (S). In this case, the beam structures 1c and 1d including the asymmetrical steel 10 may further include a restraint support 23b. The restraint support 23b connects and supports the space cover plate 21b and the upper flange 11a to enable the restraint of the concrete 50 to be filled in the filling space S in advance by the space cover plate 21b or to be filled during construction. do. For example, the restraint support 23b may be in the form of a rod or a plate.

5a shows that the filling space S is filled with the concrete 50 during construction, and FIG. 5b shows the precast concrete 25 in which the filling space S is pre-filled. In addition, the end of the space cover plate 21b in FIG. 5a is re-bent from the upper side outside both ends of the upper flange 11a to support the slab deck to the PC slab 30 during construction, and in FIG. 5b, the space The end of the cover plate 21b is re-bent inward from the outer upper side of both ends of the upper flange 11a to constrain the precast concrete 25a and supports the slab deck or the PC slab 30 during construction.

For example, in Fig. 5b, the portion that is joined to the coupling web 13 of the space cover plate 21b and protrudes from both sides is made of a plate, and is opened between the upper bent portion of the space cover plate 21b and the upper flange 11a. However, unlike this, the space cover plate 21b is joined to the coupling web 13 so that an opening for pouring precast concrete is formed in the inverted state on the protruding parts on both sides, and the upper flange 11a is both ends outside. It may be implemented in a structure in which the plate bent upwards is re-bent inward to be joined to the upper flange 11a. In this case, the restraint support 23b may be a portion of the space cover plate 21b that is re-bent and joined to the upper flange 11a. Or alternatively, the space cover plate 21b is bonded to the coupling web 13 to form an opening for pouring precast concrete in an inverted state on the protruding portions on both sides, and the restraint support 23b is shown in FIG. 5b. Similar to the bar, it may be formed in a bar shape or a plate piece shape so that the reinforced concrete 50 pouring part and the precast concrete 25a part are joined during subsequent construction. In this case, the space between the upper flange 11a and the space cover plate 21b to which the restraint support 23b is connected for pouring precast concrete in an inverted state may be temporarily blocked.

[Structural system including composite beams]

Next, a structural system including a composite beam according to an aspect of the present invention will be looked at with reference to the drawings. At this time, reference may be made to embodiments of an asymmetric section having a web hole and an elongated web height according to the example of the present invention, embodiments of a beam structure including an asymmetric section, and FIGS. 1 to 5B, which overlap Descriptions may be omitted. In addition, it will be described with reference to the reference numerals shown in the drawings for the asymmetrical section having the above-described web hole and elongated web height in the description to be described later.

6 is a view schematically showing a partial cross-section of a structural system including a composite beam according to another embodiment of the present invention, and FIGS. 7A and 7B are structural systems including composite beams according to one embodiment of the present invention, respectively. It is a diagram schematically showing a slab deck used in In addition, FIGS. 5A and 5B show a partial cross section of a structural system including a composite beam, including a slab deck with a dotted line, a PC slab, and reinforced concrete. In addition, although not shown in FIGS. 3 and 4 , reinforced concrete 50 indicated by dashed lines may be added as in FIGS. 5A and/or 5B to represent some cross-sections of the structural system including composite beams.

Referring to FIGS. 5A , 5B and/or 6 , a structural system including a composite beam according to an example includes an asymmetrical section steel 10 , a plurality of slab decks to PC slabs 30 , and reinforced concrete 50 . The asymmetrical section 10 is installed between a plurality of columns or beam supports and forms a part of the composite beam. In this case, the asymmetric section 10 may be an asymmetric section 10 having a web hole and an elongated web height according to any one of the above-described asymmetric section steel embodiments. For a detailed description of the asymmetrical section 10, reference will be made to the above bar.

A plurality of slab decks to PC slabs 30 are connected in parallel between the asymmetrical sections 10 for slab concrete pouring. That is, the slab deck or PC slab 30 may be a slab base for slab concrete pouring. At this time, the lower end of each of the both ends of the slab deck to the PC slab 30 is supported directly on the asymmetric section 10 or through the support medium 20 . In addition, reinforced concrete 50 is poured on top of the asymmetric section steel 10 and the slab deck to the PC slab 30 . At this time, some concrete of the reinforced concrete 50 is integrally filled in the space S' between the coupling web 13 of the asymmetric section 10 and the slab deck to the end of the PC slab 30, or the asymmetric section steel 10 A portion of the perimeter of the precast concrete is treated to form a part of the composite beam together with the asymmetrical steel (10).

At this time, the slab deck to the PC slab 30 is supported on the asymmetric section steel 10 directly or through the support medium 20 , and the slab deck to the PC slab 30 is supported through the support medium 20 on the asymmetric section steel 10 . ) is supported, the asymmetric section 10 and the supporting medium 20 form beam structures 1a, 1b, 1c, and 1d including the asymmetric section 10 as described above. Accordingly, portions overlapping those described in the embodiments of the beam structure including the above-described asymmetrical section may be omitted, and reference will be made to the foregoing.

With reference to Figures 3 to 7b, look at the contents of the slab deck to the PC slab (30). For example, referring to FIGS. 3 , 4 , 5A , 5B and/or 6 , the slab deck to PC slab 30 is supported directly on the asymmetrical section 10 or through the support medium 20 . Although the appearance that the slab deck or PC slab 30 is directly supported on the asymmetric section 10 is not shown, in FIGS. 3, 4 and/or 6, a supporting medium ( An embodiment supported through 20) and an embodiment supported through a support medium 20 supported on the joining web 13 of the asymmetrical section 10 in FIGS. 5A and/or 5B are shown. For example, the slab deck to the PC slab 30 may be directly supported on the lower flange 12b while the space cover plate 21a is omitted in FIGS. 3, 4 and/or 6 .

In one example, the slab deck to PC slab 30 may be supported directly on the lower flange 12b of the asymmetrical section 10 or through a support medium 20 .

For example in one example. The slab deck to the PC slab 30 may form an integral structure like the concrete 50 to be poured, and in another example, the slab deck 30 may be removed after curing the concrete as a temporary facility.

For example, although not shown, in one example, the support medium 20 is a temporary support that is installed in close contact with both sides of the bonding web 13 on the lower flanges 12b on both sides of the bonding web 13 to be removed after concrete curing. can At this time, the support medium 20 may be, for example, a Styrofoam material, but is not limited thereto.

A more specific embodiment of the slab deck 30 will be described later and will be described with reference to FIGS. 7A and/or 7B , and before this, the support medium 20 for supporting the slab deck to the PC slab 30 will be first looked at.

At this time, referring to FIGS. 3, 4, 5a, 5b and/or 6, the support medium 20 is a beam structure 1a including the asymmetric section 10 together with the asymmetric section 10 as described above. 1b, 1c, 1d). For example, referring to FIGS. 3, 4, 5A, 5B and/or 6 , the support medium 20 is formed by joining, for example, on the lower flange 12b of the asymmetrical steel 10, or a combination of the asymmetrical steel 10 . It may be formed by bonding on the web (13). For example, the support medium 20 may include a space cover plate (21a, 21b) and support the slab deck to the PC slab (30). For example, referring to FIGS. 3, 4 and/or 6, the slab deck to the PC slab 30 is supported on the supporting medium 20 joined on the lower flange 12b of the asymmetrical section 10, and FIG. 5a and Referring to / or 5b, the slab deck to the PC slab 30 may be supported on the support medium 20 formed by being coupled on the bonding web 13 of the asymmetric section 10.

3 , 4 , 5a , 5b and/or 6 look at the support medium 20 . The support medium 20 for supporting the slab deck to the PC slab 30 may include space cover plates 21a and 21b. For example, the support medium 20 may further include supports (23a, 23b) in addition to the space cover plate (21a, 21b). For example, the support (23a, 23b) can be a support medium 20 as an integrally coupled to the space cover plate (21a, 21b) to support the slab deck to the PC slab (30).

Referring first to FIGS. 3, 4 and/or 6, the support medium 20 includes a space cover plate 21a having one end joined to the lower flange 12b. The space cover plate 21a has one end joined to the lower flange 12b to form a partially open filling space S together with the lower flange 12b and the coupling web 13 of the asymmetrical steel 10. . The space cover plate (21a) supports the slab deck to the PC slab (30). For example, the space cover plate 21a may have a structure bent to be spaced apart from the coupling web 13 at a height lower than the upper flange 11a after protruding in the direction of the upper flange 11a of the asymmetrical section steel 10 .

At this time, some concrete of the reinforced concrete 50 is filled together in the space S' between the filling space S and the coupling web 13 and the slab deck to the ends of the PC slab 30, or in the filling space (S). It can be filled in the space (S') between the upper part of the pre-filled filler 25 and the bonding web 13 and the ends of the slab deck to the PC slab 30 to form a part of the composite beam together with the asymmetrical steel 10. 6 shows that some concrete of reinforced concrete 50 is filled together in the space (S') between the filling space (S) and the coupling web (13) and the ends of the slab deck to the PC slab (30) to form an asymmetric section steel (10) and indicates that they together form part of a composite beam. Although the reinforced concrete 50 is not shown in FIG. 4, by analogy with reference to FIGS. 5B and 6, some concrete of the reinforced concrete 50 is pre-filled in the filling space (S) with the filler 25 upper and the coupling web 13. It can be filled in the space (S') between the end of the and the slab deck and the PC slab 30 to form a part of the composite beam together with the asymmetrical steel 10. At this time, the filler 25 may be a concrete or Styrofoam filler 25, but is not limited thereto.

Referring to FIGS. 4 and/or 6 , in another example, the support medium 20 may further include supports 23a and 23b in addition to the space cover plate 21a. The supports 23a and 23b directly support the space cover plate 21a in the filling space S or support the space cover plate 21a to constrain the filler 25, so that the space cover plate 21a is a slab. Deck to support the PC slab (30). The filler 25 may be a concrete or Styrofoam filler. In FIG. 6 , the support 23a directly supports the space cover plate 21a in the filling space S so that the space cover plate 21a supports the slab deck or the PC slab 30 . Referring to FIG. 4 , the support 23b supports the space cover plate 21a to restrain the filler 25 so that the space cover plate 21a supports the slab deck or the PC slab 30 . At this time, the support 23a as in FIG. 6 corresponds to the plate support 21a in the embodiments of the beam structure 1a including the aforementioned asymmetrical section, and the support 23b as in FIG. 4 is the above-described In embodiments of the beam structure (1b) including the asymmetric section corresponds to the restraint support (23b).

Also look at the support medium 20 with reference to FIGS. 5A and/or 5B. At this time, in one example, the support medium 20 may include a space cover plate 21b and a support 23b. The space cover plate 21b has one end of each end joined to the coupling web 13 of the asymmetric section 10 and protrudes from the coupling web 13 laterally from the upper flange 11a of the asymmetric section 10 and then the upper Both ends of the flange (11a) are bent upwards to form a filling space (S) and support the slab deck or the PC slab (30). For a more detailed description of the space cover plate 21b, reference may be made to the foregoing.

5a and/or 5b, the support 23b is pre-filled in the filling space S by the space cover plate 21b or the upper flange 11a and The space cover plate 21b is connected and supported. At this time, the support (23b) corresponds to the restraint support (23b) in the embodiments of the beam structure (1c, 1d) including the aforementioned asymmetrical steel.

5a and/or 5b, some concrete of the reinforced concrete 50 is filled in the filling space (S) during construction, or the precast concrete (25a) pre-filled in the filling space (S) and the slab deck to the PC slab The upper flange (11a) between the (30) can be filled in the upper part to form a part of the composite beam together with the asymmetric section (10).

For example, looking at one example with reference to FIGS. 5A and/or 5B, the other end side of the space cover plate 21b is connected to the support 23b and the deck support 211c for supporting the slab deck to the PC slab 30. can be provided. At this time, the deck support 211c is, for example, re-bent from both ends of the upper flange 11a to the outside as shown in FIG. 5a so that some concrete of the reinforced concrete 50 is filled with the filling space S during construction , or may be re-bent spaced apart from both ends of the upper flange 11a inward to constrain the precast concrete 25a as shown in FIG. 5b .

With reference to FIGS. 7A and/or 7B , a specific example of the slab deck 30 will be further considered. For example, referring to FIGS. 7A and/or 7B , the multiple connection structure of the slab deck 30 includes a plurality of protrusions 31a having an upper flat surface 311a and a bottom flat surface 311b narrower than the width of the upper flat surface 311a. ) A plurality of recessed portions 31b having a may be alternately continuous. At this time, the adjacent slab decks 30 may be connected side by side with a part overlapping each other in the protrusion 31a, in the recess 31b, or between the wall surfaces of the protrusion 31a and the recess 31b. For example, Figure 7a shows the slab deck 30 that can be connected side by side while being partially overlapped with the adjacent slab deck 30 in the recess 31b, and Figure 7b is the adjacent slab deck 30 between the protrusions 31a It shows that some overlap and are connected side by side. Although not shown, a structure in which the adjacent slab decks 30 are partially overlapped between the wall surfaces of the protrusion 31a and the recessed portion 31b and connected side by side may also be implemented.

At this time, the cross section of each plate of the slab deck 30 is partially overlapped with the neighboring slab deck 30 on both sides of at least one concave portion 31b and the outermost portion and includes a protrusion 31a ′ forming a protrusion 31a. Or, at least one or more protrusions 31a and at least one or more protrusions 31a, and at least one or more protrusions 31a, at least one or more overlapping with neighboring slab decks on both sides and partially overlapping grooves 31b' to form a concave portion 31b The concave portion 31b and the outermost both sides of the slab deck 30 and the protrusion 31a and the wall surfaces of the concave portion 31b may have a structure including a partially overlapping wall portion. For example, Figure 7a is a structure in which the adjacent slab decks 30 are overlapped and connected in the recessed portion 31b, and at least one or more protrusions 31a and the neighboring slab deck 30 are partially overlapped with each other on the outermost both sides of the recessed recess. Shows the slab deck 30 including the groove portion 31b' forming the 31b, and FIG. 7b is a structure in which the neighboring slab decks 30 are overlapped in the protrusion 31a and connected side by side, at least one The above recessed portion 31b and the slab deck 30 including the protruding portion 31a ′ forming the protruding portion 31a while partially overlapping with the neighboring slab deck 30 on both sides of the outermost portion is shown. Although not shown, in FIGS. 7A and 7B, the protrusion 31a and/or the concave portion 31b in each slab deck 30 may be two or more, and the protrusion 31a or/and the concave portion 31b is two or more. In this case, one concave portion 31b may be provided between the two protrusions 31a, and one protrusion 31a may be provided between the two concave portions 31b. At this time, each of the concave portion 31b provided between the two or more protrusions 31a or the protrusion 31a provided between the two or more concave portions 31b is the concave portion 31b connecting portion or the protruding portion 31a of the connecting portion. It may have the same or similar structure as the structure, or may have a different structure. That is, the concave portion 31b or the protrusion 31a sandwiched between the two protrusions 31a or the concave portion 31b is partially overlapped in the concave portion 31b or the protrusion 31a between the neighboring slab decks 30. It may be formed to have the same or similar structure to the cast concrete structure obtained by the structure, or to have a different structure in some cases.

For example, referring to FIG. 7b , the slab deck 30 may include vertical reinforcement 37 installed vertically along the recessed portion 31b. At this time, the reinforced concrete 50 poured into the concave portion 31b may serve as an auxiliary beam perpendicular to the asymmetrical steel 10 for the slab structure between the asymmetrical steel 10 . Although not shown in Fig. 7a, similar to Fig. 7b, the neighboring slab decks 30 of Fig. 7a are overlapped with each other and vertical reinforcement 37 installed vertically on one side or both sides of the groove portion 31b' forming the concave portion 31b. may include.

For example, referring to FIGS. 7A and/or 7B , in one example, the plate of the slab deck 30 may include a deck upper plate 31 , a plurality of exposure holes 35 and a temporary member 33 . At this time, the deck upper plate 31 is bent to form an upper portion of the plate cross-section of the slab deck 30 and is in contact with the reinforced concrete 50 to form a part of the slab structure. A plurality of exposure holes 35 penetrate the deck upper plate 31 and expose the reinforced concrete 50 . At this time, by being provided with the exposed hole 35, it is possible to prevent cracking of the concrete poured on the deck upper plate 31, to increase the bonding force between the concrete and the slab deck 30, to check the slab leakage point or area, or It has the advantage of being able to check and repair easily. In addition, the temporary member 33 is coupled to the lower deck upper plate 31 to block the exposure hole 35 and is removed after the concrete is poured or cured. In this case, the temporary member 33 may be made of plastic, film, paper, or a material including a magnetic material. For example, the temporary member 33 may block all of the plurality of exposure holes 35 of the deck upper plate 31 integrally, block each area, or block individually.

In the above, the above-described embodiments and the accompanying drawings are illustratively described to help those of ordinary skill in the art for the present invention, rather than limiting the scope of the present invention. In addition, embodiments according to various combinations of the above-described configurations may be apparent to those skilled in the art from the above detailed descriptions. Accordingly, various embodiments of the present invention can be implemented in modified forms without departing from the essential characteristics of the present invention, and the scope of the present invention should be interpreted according to the invention described in the claims, and it is common in the art Various modifications, alternatives, and equivalents are included by those with knowledge of

1a, 1b, 1c, 1d: beam structure 10: asymmetrical steel
10a: first symmetrical rolled section steel 10b: second symmetrical rolled section steel
11: upper body 11a: upper flange
12: lower body 12b: lower flange
13: bonding web 13a: upper web
13b: lower web 15: web hole
15a: upper groove 15b: lower groove
20: support medium 21a, 21b: space cover plate
211c: deck support 23a; support or plate support
23b: support or restraint support 25: filler material
30: slab deck to PC slab 31: deck top
31a: protrusion 31a': protrusion
31b: groove part 31b': groove part
311a: upper flat surface 311b: bottom flat surface
313a, 313b: groove structure or protrusion structure
33: temporary member 35: exposed hole
37: vertical reinforcement 50: concrete or reinforced concrete

Claims (19)

delete delete delete By cutting one or two or more webs of rolled steel in a concave-convex structure, an upper body consisting of an upper web having an upper flange and a plurality of upper grooves formed by cutting, and a lower flange having a width longer than the width of the upper flange and cutting Obtaining each of the lower body consisting of a lower web provided with a plurality of lower grooves formed along the; and
The upper web and the lower web are welded to each other so that the upper groove of the upper body and the lower groove of the lower body are matched to form a joining web having a height longer than the height of each of the webs of the rolled steel, wherein the Comprising the step of forming an asymmetric section steel having the web hole and the elongated web height so as to include a plurality of web holes formed by matching each of the upper and lower grooves on the coupling web,
In the step of obtaining each of the upper body and the lower body, the upper body and the lower body are obtained from one asymmetric rolled section steel, or the upper body is obtained by cutting the first web of the first symmetrical rolled section steel into a concave-convex structure. Obtaining and cutting a second web of a second symmetrical rolled section steel having a flange width longer than the flange width of the first symmetrical rolled section steel into a concave-convex structure to obtain the lower body,
When each of the upper body and the lower body are obtained from different symmetrical rolled steels, the thicknesses of the first web and the second web are the same,
The height (H) of the bonding web formed in the step of forming the asymmetric section is obtained according to the following formula,

At this time, h ₁ and h ₂ each is the height of each of the first web and the second web,

class

Each of the asymmetrical section steel manufacturing method having a web hole and an elongated web height, characterized in that each of the depth of the upper groove and the lower groove.
In claim 4,
In the step of obtaining each of the upper body and the lower body, the shape of each of the upper and lower grooves is a trapezoid, a rectangle, a chamfered structure of the trapezoid or a rectangle, or a semicircle to a semi-ellipse, but the upper and lower Cut to match the length of each protruding end of the sieve,
In the step of forming the asymmetrical steel, the shape of the upper groove and the lower groove is matched with a hexagon, a square, a matching shape of the trapezoidal or rectangular chamfered structure, or the web hole formed of a circle or an ellipse is formed on the coupling web. A method of manufacturing an asymmetrical steel section having a web hole and an elongated web height, characterized in that it forms.
delete delete delete delete delete A structural system comprising a composite beam,
Asymmetric beams having a web hole and an elongated web height, which are installed between a plurality of columns or beam supports and form a part of the composite beam;
A plurality of slab decks or PC slabs connected in parallel between the asymmetrical beams for slab concrete pouring, and the lower ends of each of the both ends are supported directly by the asymmetrical beams or through a support medium; and
Containing reinforced concrete poured over the asymmetrical steel and the slab deck to the PC slab,
The asymmetric section includes an upper body including an upper flange and an upper web having a plurality of upper grooves formed on the upper web, a lower flange and a lower web having a plurality of lower grooves formed on the lower web, and the asymmetrical steel section. The upper web and the lower web include a plurality of the web holes formed by matching each of the upper and lower grooves on a bonding web formed by welding, the width of the lower flange is longer than the width of the upper flange,
Some concrete of the reinforced concrete is integrally filled in the space between the bonding web of the asymmetrical section and the end of the slab deck to the PC slab, or a part of the asymmetrical section is precast concreted around the composite beam together with the asymmetrical section form part of
The support medium is a temporary support installed in close contact with both sides of the coupling web on the lower flanges on both sides of the coupling web, and a structural system including a composite beam, characterized in that it is removed after concrete curing.
In claim 11,
The upper body consists of the upper flange and the upper web from which the first symmetrical rolled section steel is cut,
The lower body consists of the lower flange and lower web from which a second symmetrical rolled section steel is cut,
The shape of the web hole is a trapezoid, a rectangle, a chamfered structure of the trapezoid or a rectangle, or a hexagon, a quadrangle, the trapezoid or the rectangular chamfered structure in which the shapes of the upper and lower grooves made of a semicircle or a semi-ellipse are matched. Matching of the chamfered structure A structural system including a composite beam, characterized in that it has a shape, or a circular or oval shape.
In claim 11,
The thickness of the upper web and the lower web is the same,
The lengths of the protruding ends of the upper body and the lower body are identically matched to form the web hole by the upper groove and the lower groove,
Each of the upper body and the lower body is obtained by cutting the web of rolled steel into a continuous concave-convex structure with the same height between the cut mountains and valleys so as to have a web elongation effect by half of the difference in height between the upper and lower parts of the web hole. containing structural systems. delete delete delete delete delete delete

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