KR101470135B1 - Steel frame structures using steel beam having tapered flange - Google Patents

Abstract

The present invention relates to a cross-sectional member for increasing the size of a member required only for a steel beam and a steel frame, and for reducing the size of a member having a smaller stress, and a structure using the member. More particularly, The present invention relates to a steel beam and a steel frame which constitute an effective section by changing the cross section of the flange which resists the bending moment
According to a preferred embodiment of the present invention, a flanged flange having a width greater than a width of an end flange in a central portion of a flanged steel frame, the flange having a width that is constant at both ends of the flange, The upper and lower flanges being arranged in parallel to each other with an interval therebetween and vertically disposed between the upper and lower flanges so as to connect the upper and lower flanges, Characterized in that the cross-section is not used more than necessary at both ends.

Description

Technical Field [0001] The present invention relates to steel frame structures using steel beam having tapered flange,

The present invention relates to a cross-sectional member for increasing the size of a member required only for a steel beam and a steel frame, and for reducing the size of a member having a smaller stress, and a structure using the member. More particularly, The present invention relates to a steel beam and a steel frame which constitute an effective section by varying a cross section of a flange which resists a bending moment in a longitudinal member having a sectional shape.

The steel structure has a high strength per unit area, which is advantageous for light weight construction and long span of the structure. Because the member can be made small, the space can be used relatively easily, and the construction time is fast and the expansion and remodeling are easy. Therefore, it is the structural form of the structure which is most widely applied together with the reinforced concrete structure.

It is designed to withstand the bending moment and shear force generated by the visible load of the structure. In the case of the reinforced concrete structure, reinforcement is applied to the end and the center in order to resist the stress depending on moment and shear force generated at the end portion and the center portion, but in the case of the steel structure, the moment and shear force It is common to select a single member over the entire section by selecting a section that can withstand the maximum stress of the member. In this case, unnecessary section is used in the section where maximum stress is not generated, resulting in uneconomical steel consumption.

As a background of the present invention, there is a patent registration No. 10-1219995 'Construction of a temporary brace, a steel composite girder, a cross-section steel girder, and a construction method of a building using these for a building structure'.

This patented cross-section steel girder is formed by using a steel girder with large dancing at the center part and a steel girder with small dancing at both ends according to the bending stress of the girder in the direction of the long side of the girder. The ends of the large steel girder are formed so that the upper flange and the part of the web are cut so that the dancer can be engaged with the end of the small steel girder, and the ends of the steel girders having small dances are welded to both ends of the steel girders A method of bonding is proposed.

There is a merit that 10 to 15% of the amount of steel material used in the long-side directional steel girder of the prior art is reduced, thereby reducing the weight of the steel girder in the direction of the long side. However, there is a possibility that the method of joining various members may not be integrated, It has a disadvantage that economical efficiency is lowered by using rolled steel material.

Patent Registration No. 10-1219995 'Construction of a brace, a steel composite girder, a cross-section steel girder and an architectural structure using these'

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to provide a steel frame structure in which a single member is not selected in a whole section, .

Another object of the present invention is to secure economical efficiency by using a steel sheet which is not a ready-made product manufactured by the rolling process.

According to a preferred embodiment of the present invention, a flanged flange having a width greater than a width of an end flange in a central portion of a flanged steel frame, the flange having a width that is constant at both ends of the flange, The upper and lower flanges being arranged in parallel to each other with an interval therebetween and vertically disposed between the upper and lower flanges so as to connect the upper and lower flanges, Characterized in that the cross-section is not used more than necessary at both ends.

According to another aspect of the present invention, there is provided an upper flange having a width smaller than a width of an end flange, the flange having a width smaller than that of the flange; And a web which is arranged in parallel with the upper and lower flanges and is vertically disposed between the upper and lower flanges so as to connect the upper and lower flanges, and a web having an H-shaped cross- And a cross section which is not more than necessary is not used at a central portion where a small resistance is required compared to both ends.

In the meantime, the steel frame structure using the flange steel beam according to the present invention maintains a constant width in a certain section of the upper part of the column and linearly decreases the width toward the center part, Side flanges; Section of the H-shaped cross-section including a web which is arranged in parallel with spacing of the flanges at both sides and which is arranged perpendicularly to both flanges between the flanges and connected to connect them to each other. Joining to the floor slab for simple support; An upper and a lower flange maintaining a constant width at both end portions and linearly decreasing the width toward the central portion and having a width smaller than the width of the flange at the end portion in a central portion; And a web which is arranged in parallel with the upper and lower flanges and is vertically disposed between the upper and lower flanges and is connected to connect the upper and lower flanges. To the upper ends of the adjacent simple support columns; An upper and a lower flange having a width greater than an end flange width in a central portion in a linearly increasing width toward a central portion while maintaining a constant width in a predetermined section at both ends; And a web disposed between the upper and lower flanges so as to be perpendicular to the upper and lower flanges and joined to connect the upper and lower flanges. And the beam is arranged between the side edge large bows so that both ends of the small side edge beams are connected to each other by a pin so as to be simply supported at the center of the side edge large bow.

Also, according to another embodiment of the present invention, a steel frame made of a steel flange steel beam has a constant width at the upper part of the column and the lower part of the column, and the width is linearly decreased toward the center part, Side flange having a width less than the width; One end on the lower side of the cross-section fixing support column made of a length-wise H-shaped cross-section including a pair of flanges arranged in parallel to each other with intervals therebetween, and a web vertically disposed between both flanges and joined to connect the two flanges, Joining the floor slab to be fixedly supported; An upper and a lower flange maintaining a constant width in a certain section at both ends and linearly decreasing the width toward the center portion and having a width smaller than the width of the flange at the end portion in a central portion; And a web which is arranged in parallel with the upper and lower flanges and is vertically disposed between the upper and lower flanges and is connected to connect the upper and lower flanges. And the upper end of the fixed end of the stationary support column adjacent to the adjacent end face; An upper and a lower flange having a width greater than an end flange width in a central portion in a linearly increasing width toward a central portion while maintaining a constant width in a predetermined section at both ends; And a web disposed between the upper and lower flanges so as to be perpendicular to the upper and lower flanges and joined to connect the upper and lower flanges. And the beam is arranged between the side edge large bows so that both ends of the small side edge beams are connected to each other by a pin so as to be simply supported at the center of the side edge large bow.

Since the steel beam and the steel rayon frame according to the present invention can not be used more than necessary in a section requiring less moment resistance than the conventional steel beam and steel rayon frame beam having a certain cross section with respect to the entire section, And the entire structure can be lightened, and the use of the steel plate instead of the conventional rolling steel can provide a more economical design.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
Fig. 1 is a moment diagram of a beam and a frame. Fig. 1a is a moment diagram of a simple beam, Fig. 1b is a moment diagram of a fixed support beam, Fig. 1c is a moment of a raymen frame having a wedge- It is the moment of the frame.
FIG. 2 is a perspective view of a cross-sectional beam according to an embodiment of the present invention. FIG. 2a is a perspective view, FIG. 2b is a sectional view taken along line AA of FIG. 2a, and FIG.
FIG. 3 is a perspective view of a side elevation according to an embodiment of the present invention. FIG. 3a is a perspective view, FIG. 3b is a CC sectional view of FIG. 3a, and FIG. 3c is a DD sectional view of FIG.
FIG. 4 is a cross-sectional view of a simple supporting column according to an embodiment of the present invention. FIG. 4A is a perspective view, FIG. 4B is an EE sectional view of FIG. 4A, and FIG. 4C is a FF sectional view of FIG.
FIG. 5 is a perspective view of a stationary support for supporting a cross section according to an embodiment of the present invention. FIG. 5A is a perspective view, FIG. 5B is a cross-sectional view taken along line GG of FIG. 5A, and FIG.
6 is a schematic view of a raymen frame using a flange steel beam with a flange and a simple support column with a flange according to an embodiment of the present invention.
FIG. 7 is a schematic view of a raymen frame using a flange steel beam with a flange and a supporting column with a flange according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

1 is a moment diagram of beam and frame.

FIG. 1A is a moment diagram of a simple beam, FIG. 1B is a moment diagram of a fixed support beam, FIG. 1C is a moment diagram of a rament frame having a pin-type framework angle, and FIG.

As shown in FIG. 1A, since a maximum moment occurs at the center of a simple support pin having both ends fixed, it is necessary to select a member having a sectional force that can resist the center portion moment. If a section that can resist the maximum moment is used as a fixed section over the entire length of the member, unnecessary material waste occurs in the section where the moment is small or does not occur. Similarly, as shown in FIGS. 1B to 1D, since the moments generated in beams and columns vary according to the sections, the design method using the entire length to select a section capable of resisting the maximum moment requires less moment resisting capability It is unneccessary to use more sections than necessary in the section.

The upper and lower flanges of the H-shaped cross-sectional shape resist the bending moment, and the web is subjected to the shearing force. In general, the beam member is dominated by the bending moment, so the required bending moment resistance is calculated to determine the thickness and width of the flange.

According to the present invention, a flange width of a flange having a width corresponding to a shape of a flange having a width corresponding to a moment distribution is smaller than a flange width of flanges at both ends, And a larger-width section skived beam 20 that is larger than the flange width of the central section. When these are collectively referred to as a flange section steel beam section 1, In other words, the end flange steel beam (1) is supported at both ends according to the supporting conditions at both ends, so that the beam (10) having the maximum moment at the center generates a large moment, (20).

First, the small cross-sectional beam 10 according to the present invention is arranged vertically to the upper flange 11, the lower flange 12, the upper and lower flanges 11, 12 spaced apart from and spaced apart from the upper flange 11 And the web 13 connecting them is a length member having an H-shaped cross-sectional shape and can be a built-up product manufactured by separately preparing each member and welding them. If it is manufactured by built-up, the cross-sectional size is not limited, and the width and strength of the upper and lower flanges can be different, which makes it possible to construct a more efficient cross-section.

The upper and lower flanges 11 and 12 of the beam 10 according to the present invention are manufactured on the basis of a moment diagram. In the central portion where the maximum moment is generated, the width of the flange is increased and the moment At the end side, the flange is made smaller than the central flange.

FIG. 2 is a cross-sectional view of a small cross-sectional beam according to an embodiment of the present invention. FIG. 2a is a perspective view, FIG. 2b is a cross-sectional view taken along the line A-A of FIG. 2a, and FIG.

As shown in FIG. 2, the upper and lower flanges 11 and 12 of the beam 10 having a small cross section maintain a constant width b1 at a certain section le at both ends and linearly increase the width toward the center And the width w2 is set to be larger than the width w1 of the end flange in the center section lm.

The upper and lower flanges 11 and 12 manufactured in this manner are arranged in parallel to each other with a space therebetween and arranged vertically between the upper and lower flanges 11 and 12 in the upper and lower flanges 11 and 12, (13) is welded to make the beam 10 having a small cross section a length of H-shaped cross section. Although the upper flange 11 and the lower flange 12 are shown to have the same shape and thickness in the figure, the present invention is not limited thereto, and the case where the shapes of the upper flange 11 and the lower flange 12 are asymmetric is also included The case where the thicknesses of the upper flange 11 and the lower flange 12 are different is also included.

The numerical values of both the end flange width b1 and the central flange width b2 and the end side constant interval le and the center side constant interval lm can be determined according to the bending moment resistance capability required according to the structure design.

The small-sized beam 10 according to the present invention manufactured as described above can save a steel material because it does not require more than two sections at both ends that are simply supported as compared with a conventional small beam having a constant section with respect to the entire section, By using steel plates instead of sections, it is more economical and the entire structure can be lightened.

In the case of a large supporting beam with both ends fixedly supported, for example, a large beam in a rament frame, both ends are fixed as shown in FIG. 1B, so that an end moment is larger than a central moment.

Sectional side view large spool 20 according to the present invention includes a lower flange 22 and upper and lower flanges 21 and 22 vertically arranged and spaced from and spaced apart from the upper flange 21 and the upper flange 21, Up product that is manufactured by separately preparing each member and welding them as in the case of the small-sized cross-section beam 10, in which the web 23 is formed into a H-shaped cross-section. If it is manufactured by built-up, the cross-sectional size is not limited, and the width and strength of the upper and lower flanges can be different, which makes it possible to construct a more efficient cross-section.

The upper and lower flanges 21 and 22 of the side-by-side large beam 20 according to the present invention are manufactured based on a moment diagram. The flange 21 and 22 are formed at the ends where the maximum moment is generated, The flange is made smaller than the end flange.

FIG. 3 is a perspective view of a side sectional large beacon according to an embodiment of the present invention. FIG. 3a is a perspective view, FIG. 3b is a sectional view taken along the line C-C of FIG. 3a, and FIG. 3c is a sectional view taken along the line D-D of FIG.

3, the upper and lower flanges 21 and 22 of the side section large bow 20 maintain a constant width b3 at a certain section le at both ends and linearly decrease the width toward the middle section, And is formed to have a width b4 that is smaller than the end side flange width b3 in the constant section 1m.

The upper and lower flanges 21 and 22 are arranged parallel to each other with an interval therebetween. The upper and lower flanges 21 and 22 are vertically disposed between the upper and lower flanges 21 and 22, (20) can be made into a length having an H-shaped cross-section. Although the upper flange 21 and the lower flange 22 are shown to have the same shape and thickness in the figure, the present invention is not limited thereto, and the case where the shapes of the upper flange 21 and the lower flange 22 are asymmetric is also included The case where the thicknesses of the upper flange 21 and the lower flange 22 are different is also included.

The numerical values of both the end flange width b3, the center flange width b4 and the end side constant interval le and the center side constant interval 1m can be determined according to the bending moment resistance capability required according to the structure design.

In contrast to the conventional large beam having a constant cross section with respect to the entire section, the cross section large beam 20 according to the present invention manufactured in this way is not required to have a cross section more than necessary at a central portion where a small resistance is required compared with both ends fixedly supported It is possible to save the steel, and by using the steel plate instead of the rolled steel, it is more economical and the entire structure can be lightened.

In the rainstorm frame, the vertical loads to be loaded should be transferred to the ground by the axial force of the column, and they must be joined to the large beam and to resist the bending moment and shear force due to the horizontal load. The flanges and webs of the H-shaped cross-section of the column transmit the load to the ground by axial force, while the flanges of both sides resist the bending moment, and the web is subjected to the shearing force.

The moment generated in the column when the column base of the column is supported by a pin and the column and the large beam are in contact with each other in a rament frame structure composed of a beam and a column is maximized at the top of the column as a column- And the moment decreases as it goes to the lower part of the column, which is a part of the sidewall.

The simple supporting members 30 for side sections according to the present invention are provided with side flanges 31 and 31 disposed parallel to each other with a space therebetween and a web 32 vertically arranged on both flanges 31 and 31 for connecting them, And can be a built-up product manufactured by separately preparing each member as a length member forming a cross-sectional shape and welding them. The advantage of the built-up construction is that the cross-sectional size is not limited and the width and strength of the flanges of both sides can be different.

4A is a perspective view of a simple supporting member of a side section according to an embodiment of the present invention, FIG. 4B is a sectional view taken along line E-E of FIG. 4A, and FIG. 4C is a sectional view taken along line F-F of FIG.

As shown in FIG. 4, the flanges 31 and 31 on both sides of the simple support column 30 maintain a constant width b5 at a predetermined interval lt of the upper portion of the column and linearly decrease the width toward the center portion, In the lower constant section lb, the flange width b5 is smaller than the upper flange width b5.

The web 32 is welded so that the two flanges 31 and 31 produced in this manner are disposed parallel to each other at intervals and arranged perpendicularly to the flanges 31 and 31 between both flanges 31 and 31 to connect them The simple support columns 30 can be formed into a H-shaped cross section.

The numerical values of the upper flange width (b5), the lower flange width (b6), the upper section of the column (l) and the lower section (lb) of the column can be determined according to the bending moment resistance capability .

Since the simple support column 30 according to the present invention is constructed in such a manner as compared with a conventional simple support column having a constant cross section with respect to the entire length, By using the steel plate instead of the rolled steel, it is more economical and the entire structure can be lightened.

The moment generated in the column when the column base of the column is fixedly supported in the rament frame composed of the beam and the column occurs at the maximum at the column-to-beam joint and the corner of the column as shown in FIG. 1d, Small in the central part.

Side support flange 41 and the flange 41 are disposed perpendicular to the flanges 41 and 41 and the web 42 connecting the flanges 41 and 41 is perpendicular to the flanges 41 and 41, And can be a built-up product manufactured by separately preparing each member as a length member forming a cross-sectional shape and welding them. The advantage of the built-up construction is that the cross-sectional size is not limited and the width and strength of the flanges of both sides can be different.

FIG. 5 is a perspective view of a stationary support for supporting a cross section according to an embodiment of the present invention. FIG. 5A is a perspective view, FIG. 5B is a sectional view taken along line G-G of FIG. 5A, and FIG. 5C is a sectional view taken along line H-H of FIG.

As shown in FIG. 5, the flanges 41 and 41 on both sides of the stationary support column 40 maintain a constant width b7 at a certain interval (lt, lb) between the upper part of the column and the lower part of the column, So as to have a width b8 which is smaller than the flange width b7 on both sides of the column in the central portion constant section lm.

The web 42 is welded so that the two side flanges 41 and 41 manufactured in this way are arranged parallel to each other at intervals and vertically arranged between the flanges 41 and 41 on both sides between the flanges 41 and 41 so as to connect them The cross-section fixing support columns 40 can be formed into a H-shaped cross-section.

The numerical values of flange width (b7), central flange width (b8), upper and lower part of the column (lt, lb) and center part side constant section (lm) It can be decided in accordance with.

In the present invention, it is preferable that the supporting column 40 has a larger beam than the conventional supporting column having a constant section with respect to the entire section, It is possible to save the steel material, and by using the steel plate instead of the rolled steel, it is more economical and the entire structure can be lightened.

6 is a schematic view of a raymen frame using a flange steel beam with a flange and a simple support column with a flange according to an embodiment of the present invention.

As shown in FIG. 6, the razor frame using the flange steel beam 1 and the simple support columns 30 according to an embodiment of the present invention is constructed by arranging the simple support columns 30 at the planned positions The simple supporting columns 30 are joined so that one end on the lower side is simply supported on the bottom slab (not shown), and the side-view large springs 20 are disposed between the other side on the upper side of the adjacent supporting posts 30, The upper end of the simple support column 30 and the both ends of the large side beam 20 are welded by any method such as welding and the small beam 10 having a small cross section is disposed between the large side beams 20, (10) is simply connected to the central portion of the side surface large spool (20) by a pin connection.

FIG. 7 is a schematic view of a raymen frame using a flange steel beam with a flange and a supporting column with a flange according to an embodiment of the present invention.

As shown in FIG. 7, the razor frame structure using the flange steel beam 1 with the flange and the support posts 40 with the flange at one side according to an embodiment of the present invention is constructed by arranging the flange supports 40 at the planned positions Sectional large-diameter girders 20 are disposed between the other ends of upper side of the adjoining side-surface-fixing support columns 40 so that one end of the lower side of the side-by-side fixed support columns 40 is fixedly supported on the bottom slab The upper end of the single-sided fixing support column 40 and both end portions of the side beam 20 are welded by any method such as welding and the small beam 10 having a side section is disposed between the side beams 20, 10 are connected to each other by a pin so as to be simply supported at the central portion of the side surface large bow.

As described above, according to the present invention, a rainstorm frame using a small-sized cross-section beam 10, a cross-section large beam 20, a simple support column 30, or a cross- It is possible to save the steel material and to use the steel plate instead of the rolled steel, which is more economical and can reduce the weight of the entire structure.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

1: flange steel flange with side flange 10: small side flange steel beam
11: Section beam with small cross section upper flange 12: Section beam with small cross section Lower flange
13: small beam web 20:
21: Upper flange upper flange 22: Lower flange lower flange
23: ribbed webbing web 30:
31: Simple Supported Side Columns Both Side Flanges
32: simple support column support web 40: support column support
41: Flange on both sides of fixed column support column
42: Fixed Supported Column Web

Claims (4)

delete delete Side flanges (31, 31) having a width smaller than the flange width of the upper part of the column in a certain period of the lower part of the column, while maintaining a constant width in a certain section of the upper part of the column and gradually decreasing the width toward the middle part. And a web (32) which is arranged parallel to both flanges (31, 31) and spaced apart from each other and vertically arranged on both flanges (31, 31) between the flanges Joining one end of the lower side of the simple support column 30 made of the longitudinal members of the sectional shape to the bottom slab for simple support;
Upper and lower flanges (21, 22) having a width smaller than the width of the end side flange (21, 22) while maintaining a constant width at both end portions and linearly decreasing the width toward the center portion. The upper and lower flanges 21 and 22 are disposed parallel to each other with a space therebetween and vertically disposed between the upper and lower flanges 21 and 22 so as to be connected to each other. End portions of an upper end of a simple support column (30) adjacent to an adjacent one of the side supports (20);
Upper and lower flanges (11, 12) having a width greater than the width of the end side flange (11, 12) in a central portion in a constant width at both end portions while maintaining a constant width and linearly increasing the width toward the central portion; The upper and lower flanges 11 and 12 are disposed parallel to each other with an interval therebetween and are vertically disposed between the upper and lower flanges 11 and 12 so as to be connected to each other. (10) made of a length of an H-shaped cross-sectional shape including the main beam (10) and the main beam (10) And is joined to the center portion so as to be simply supported. Side flanges (41, 41) having a width smaller than the upper and lower flange widths of the column in a certain section in the middle part while maintaining a constant width in the upper part of the column and the lower part of the column; And a web 42 which is disposed parallel to both flanges 41 and 41 at intervals and which is vertically disposed on both flanges 41 and 41 between both flanges 41 and 41 to join them, One end of the lower side of the cross-section fixing support column 40, which is made of a length of the cross-sectional shape, is fixedly supported on the bottom slab;
Upper and lower flanges (21, 22) having a width that is smaller than the width of the end side flange (21, 22) at a certain interval in a central portion by gradually decreasing the width toward the center portion. The upper and lower flanges 21 and 22 are disposed parallel to each other with a space therebetween and vertically disposed between the upper and lower flanges 21 and 22 so as to be connected to each other. End portions of an upper end portion of an upper end portion of an adjacent cross-section fixing support column (40);
Upper and lower flanges (11, 12) having a width greater than the width of the end side flange (11, 12) in a central portion in a constant width at both end portions while maintaining a constant width and linearly increasing the width toward the central portion; The upper and lower flanges 11 and 12 are disposed parallel to each other with an interval therebetween and are vertically disposed between the upper and lower flanges 11 and 12 so as to be connected to each other. (10) made of a length of an H-shaped cross-sectional shape including the main beam (10) and the main beam (10) And is joined to the center portion so as to be simply supported.

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