KR20150068532A - Connecting structure and method between weak axis of double web steel column and beam - Google Patents

Connecting structure and method between weak axis of double web steel column and beam Download PDF

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Publication number
KR20150068532A
KR20150068532A KR1020130153864A KR20130153864A KR20150068532A KR 20150068532 A KR20150068532 A KR 20150068532A KR 1020130153864 A KR1020130153864 A KR 1020130153864A KR 20130153864 A KR20130153864 A KR 20130153864A KR 20150068532 A KR20150068532 A KR 20150068532A
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South Korea
Prior art keywords
web
column
double
horizontal beam
joining
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KR1020130153864A
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Korean (ko)
Inventor
김상섭
조한솔
이태규
황보찬
강민정
신동기
최영한
Original Assignee
한국기술교육대학교 산학협력단
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Priority to KR1020130153864A priority Critical patent/KR20150068532A/en
Publication of KR20150068532A publication Critical patent/KR20150068532A/en

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Abstract

A coupled structure of a horizontal beam and a weak-axis connection portion of a double web column and a coupling method thereof are disclosed. According to the present invention, the present invention comprises: a double web column installed in a longitudinal direction; a connector coupled to a web of a double web column and a flange parallel to the flange of the double web column; and a horizontal beam inserted into the connector to be fixated. The connector is formed to distribute stress concentration capable of being generated in a portion where the web of the double web column and the flange are coupled. According to the present invention, the connector connecting the horizontal beam to the double web column is installed in order to distribute the stress concentration capable of being generated in the double web column and a weak-axis connection portion of the horizontal beam so as to reinforce the coupled structure of the double web column and the horizontal beam.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a joining structure between a joining part of a double web column and a horizontal beam,

[0001] The present invention relates to a joining structure and joining method of a joining part of a double web column and a horizontal beam and more particularly to a joining structure and joining method of joining a joining part and a joining part of a double- To a joining structure of a joining part of a double web column and a horizontal beam and a joining method of the joining part of the double web column reinforcing the joining structure of the joining part of the double web column and the horizontal beam.

A double web column is a closed elliptical section member having a cross section in the form of a "'", and is widely used for a skeleton of a large structure such as a building, a ship, and a civil engineering work. A pair of webs (web), and a pair of flanges corresponding to the vertical bars on both sides of the pair of webs.

Generally, a double web column is mainly used to form a frame of a building. A column supporting the vertical force of the building installed vertically to the ground, and a horizontal beam connected horizontally to the column to support the horizontal force of the building (Rigid frames) to form the skeleton of the building. There is a problem in that the brittle behavior at the fracture of the joint portion in the ramen structure in which the horizontal beam is joined to the weak axis joint of the double web column.

Korean Patent Laid-Open Publication No. 10-2003-0045863 discloses a " joining structure and joining method of a split tee to a weak axis " in connection with a joining structure of an axially joined portion and a horizontal beam. Korean Patent Laid-Open Publication No. 10-2003-0045863 consists of an H-beam column, a split tee, a horizontal stiffener and an H-beam horizontal beam. The split tee is attached to the web of the machine and acts as a connecting member to join the column to the horizontal beam. The horizontal stiffener is welded to both the web of the column and the flanges of the column by moving a predetermined distance leaving the minimum high-strength bolt tightening work space necessary to attach the split tee to the web of the column at the top and bottom of the horizontal beam.

However, in Korean Patent Laid-Open Publication No. 10-2003-0045863, the H-shaped steel column and the split steel are attached by using high-strength bolts. The load (dynamic and static load) Especially, the seismic load applied to the building by earthquake causes the stress concentration phenomenon to occur at the joint part between the H-shaped column and the split tie, so that the joint part is brittle and breaks, resulting in a considerable risk to the stability of the building And the life of the building is shortened.

In addition, the split tee is coupled to the upper and lower flanges of the horizontal beam by high-strength bolts. The tensile-compressive stress is repeatedly generated at the bending portion of the split tee due to the load applied to the building as described above. There is a problem that fatigue fracture (fatigue rupture) frequently occurs due to cracking at the bent portion of the split tee.

(0001) Korean Patent Publication No. 10-2003-0045863 (Published Date: June 6, 2003)

It is an object of the present invention to provide a joining structure of a double web column and a joining portion of a double web column to reinforce the joining structure of the double web column and the horizontal beam by distributing the stress concentration, And to provide a joining structure of horizontal beams and a joining method.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. .

According to the present invention, the above object is achieved by a double web column installed longitudinally; A connecting port coupled to a web and a flange of the double web post in a direction parallel to a flange of the double web post; And a horizontal beam inserted and fixed to the connection port, wherein the connection port is formed so as to disperse stress concentration that may be generated at a joint portion between the web and the flange of the double-web column. And the joining structure of the joining part and the horizontal beam.

The connector is adapted to distribute stress concentrations that may be generated in the joining portion of the web and flange of the double web post to the web of the double web post and to the flange of the double web post, And a horizontal member having a wide or constant width.

The horizontal member is composed of an upper plate and a lower plate symmetrically formed to be respectively coupled to the upper surface and the lower surface of the horizontal beam, and each of the upper plate and the lower plate is connected to the web and the flange of the double- A fixed portion coupled thereto; And a projection extending from the fixing portion to the horizontal beam and having an end portion formed to have the same width as the horizontal beam.

A vertical haunch may be formed in the horizontal member so that a shearing force acting on the horizontal beam can be dispersed by the double web column.

The above object is achieved according to the present invention by a method for joining a joining structure of a joining structure of a joining part of a shaft and a joining part of a joining part of a double web column by welding the lower plate to a web and a flange of the double web column; Installing the double web column in a longitudinal direction; Placing the horizontal beam on an upper surface of the lower plate and coupling the lower surface of the horizontal beam and the upper surface of the lower plate with a bolt; Placing the upper plate on the upper side of the horizontal beam and coupling the upper side of the horizontal beam and the lower side of the upper plate with the bolts; And joining the upper plate to the web and the flange of the double-web column to weld the joining structure of the joining structure of the joining part of the double-web column and the horizontal beam.

According to the present invention, since the connecting port connecting the horizontal beam to the double web column is provided, it is possible to disperse the stress concentration that may occur in the weakly axial joint between the double web column and the horizontal beam, thereby reinforcing the joining structure of the double web column and the horizontal beam It is possible to provide a joining structure and joining method of the joining part of the axle shaft of the double web column and the horizontal beam.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the overall structure of a joining structure of a joining part of a double web column and a horizontal beam according to an embodiment of the present invention; FIG.
Fig. 2 is a perspective view showing a combined structure of a joining structure of the joining part of the double-web column and the horizontal beam of Fig. 1; Fig.
3 is a plan view showing a state of engagement of a double web column and a horizontal member in a joining structure of a joining part of a double web column and a horizontal beam of the double web column of Fig.
Fig. 4 is a plan view showing a combined structure of a joining structure of a joining part of the double-web column and the horizontal beam in Fig. 1; Fig.
Fig. 5 is a front view showing a combined structure of a joining structure of the joining part of the double-web column and the horizontal beam in Fig. 1; Fig.

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

The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification.

The joining structure and joining method of the joining part and the horizontal beam of the double web column according to the present invention reinforces the joining structure of the double web column and the horizontal beam so that the stress that may occur in the joining part of the joining part of the double- So that the concentration can be dispersed.

FIG. 1 is a perspective view showing the entire structure of a joining structure of a joining part of a double-web column and a horizontal beam according to an embodiment of the present invention, FIG. 2 is a view showing a joining structure of a joining structure of a joining part of a double- Fig. 3 is a plan view showing a combined state of a double web column and a horizontal member in a joining structure of a joining part of a double-web column and a horizontal beam of the double-web column of Fig. 1. Fig. 4 is a cross- FIG. 5 is a front view showing a combined structure of a joining structure of a joining part of a double-web joint and a horizontal beam of FIG. 1; FIG.

As shown in FIGS. 1 and 2, the joining structure 100 between the axially joined portion and the horizontal beam of the double web column according to an embodiment of the present invention includes a double web column 110, a horizontal beam 130, (150).

The double beam column 110 is installed in the longitudinal direction on the ground and the horizontal beam 130 is connected to the web 111 of the double web column 110 and the flange 112 of the double web column 110 in the direction parallel to the flange 112 of the double- (112) so that the double web post (110) and the horizontal beam (130) constitute the skeleton of the building structure, that is, the skeleton.

In the joining structure 100 of the joining part of the double web column and the horizontal beam of the double web column according to the present invention, the horizontal beam 130 is arranged in a direction parallel to the flange 112 of the double web column 110, But it is not necessarily limited thereto and may be coupled to the web 111 of the double web column at a predetermined angle.

Generally, the joining structure formed by joining the beams to the weak axis of the double web column 110 is formed by joining the joining portion of the beam with the weak axis of the double web column 110 and joining the joining structure with the high strength bolt B Is often used.

Since the coupling member and the beam are coupled by fastening bolts, the welding mechanism is unnecessary or minimized, and the coupling operation is performed using the tool so that the coupling operation is performed in a short time, It is a bonding method which is mainly used for assembling the building structure.

The structure is affected by static and dynamic load or wind (especially in the case of high-rise buildings) which are loaded on the building. The structure is not damaged or collapsed even if repeated external force due to earthquake occurs. In order to maintain the structural integrity of the building structure, the earthquake resistance that can withstand the earthquake load is required.

However, in a building structure in which a double web column and a beam are combined by a connecting member, the joint between the connecting member and the column is vulnerable to repeated loads such as seismic loads. Due to the above-described influence, When a load or a seismic load occurs, the stress is concentrated on the joint and brittle fracture occurs. Such a problem is a serious risk to the stability of the building, and a representative example in which the life of the building is shortened It has been recognized as a factor.

Also, fatigue due to repeated stress is concentrated on the bending portion of the connecting member, and fatigue breakage frequently occurs at the bending portion of the connecting member.

The brittle fracture and the fatigue fracture that may occur at the joint portion of the coupling 150 may be generated by the double web pillars 110 And a coupling 150 formed to disperse stress concentration that may be generated at a coupling portion between the coupling portion 150 and the coupling portion 150 may be prevented.

The connection 150 is welded and coupled to the web 111 and the flange 112 of the double web post in a direction parallel to the flange 112 of the double web post 110 so that one end of the horizontal beam 130 is coupled.

As shown in FIGS. 1 and 2, the connector 150 includes a horizontal member 151 coupled in a direction perpendicular to the double-web post 110.

The horizontal member 151 is positioned in a direction away from the web 111 and the flange 112 of the double web column so that the concentration of stress that may occur in the joining portion of the double web post 110 with the web 111 and the flange 112 The width is made wider or constant toward the web 111 of the double web column so as to be dispersed.

The horizontal member 151 is composed of an upper plate 151a and a lower plate 151b symmetrically formed to be coupled to the upper and lower surfaces of the horizontal beam 130, respectively.

The upper plate 151a and the lower plate 151b are welded to the web 111 and the flange 112 of the double web column at the same interval as the height of the horizontal beam 130 to form the upper flange 132a And the lower flange 132b with the high-strength bolts B and the nuts N, respectively.

3 and 4, a coupling hole 153 for fastening the horizontal beam 130 and the high-strength bolt B is formed on the upper plate 151a and the lower plate 151b, And a coupling hole 133 corresponding to the upper flange 132a and the lower flange 132b of the horizontal beam 130 are formed. The upper plate 151a and the lower plate 151b are composed of a fixing portion P and a projection E, respectively.

The upper plate 151a and the lower plate 151b may be manufactured to have various thicknesses so as to adjust the strength and rigidity according to the operating load.

The fixing portion P is a portion welded to the web 111 and the flange 112 of the double web column and formed with a constant width to form a coupling surface with the vertical member 152, The width of the horizontal beam 130 is the same as the width of the horizontal beam 130. As shown in FIG.

The stress transmitted from the horizontal beam 130 to the horizontal member 151 is dispersed to the web 111 and the flange 112 of the column 110 via the fixing portion P, 110 are improved.

As described above, when the horizontal member 151 is welded to the weak axis connection portion of the column 110, the welding amount of the column 110 and the horizontal beam 130 is increased to increase the rigidity and strength of the joint portion. The brittle fracture of the welded part becomes difficult.

That is to say that the concentration of stress that may occur in the web 111 of the double web post 110 and the joint of the flange 112 and the coupling 150 is dispersed away from the web 111 of the double web post, It is possible to prevent the brittle fracture of the joining portion between the web 111 and the flange 112 of the column and the joining portion 150, that is, the welded portion. As a result, a plastic hinge is induced in the horizontal beam 130 It will be possible.

When the bending force, that is, the load is increased beyond the elastic limit of the steel material in the beam subjected to the bending force like the horizontal beam 130 of the present invention, the plastic hinge enters the plastic region from the outermost edge of the beam side , And finally the entire cross section of the beam enters the firing station. As one of the neutral axes is compressed and the other is subjected to the plastic tension, the bending moments remain constant. It is a phenomenon that continues.

That is, when the coupling 150 is installed in the column 110, the coupling structure 150 is guided to the soft fracture of the horizontal beam 130 from the brittle fracture of the welded joint of the double-web column 110 and the coupling 150, 100 is improved. A scallop (S) is formed at the welded joint.

The scallop (S) is a welded joint that is welded to welded joints. If the welded joint is concentrated or close to one place, the residual stress due to the weld becomes large and the weld metal is subjected to the heat of welding several times. A scallop S is formed at a welded joint portion that generally intersects with each other as an annular notch formed in the base material.

It is preferable that the fixing portion P is formed to have the same length as the length of the flange 112 of the double-web post 110 (S, the length protruding from the web). The exiting length S of the double-web pillar 110 may be formed at various intervals, but it is preferable that the exclusion length S is 70 mm or less. The reason why the exiting length S of the double web column 110 is limited to 70 mm or less is that the flange 112 is formed on three sides of the upper plate 151a and the lower plate 151b at an exuding length S of 70 mm or less, And the mechanical behavior of distributing the stress effectively to the web 111. [

The double web pillar 110 can be used as a concrete filled steel tube (CFT) column by filling the center portion with a filler F such as concrete. In the conventional CFT column, diaphragm inner and outer diaphragms are required to act as a point of a fracture when joining with a horizontal beam. However, since the weak axis joint of the double web column 110 has a ' Can be attached with a rigid coupling structure, there is an advantage that inner and outer diaphragms which are made and can be reduced in workability can be removed.

5, a vertical haunch 152 may be formed in the horizontal member 151 so that a shearing force acting on the horizontal beam 130 may be dispersed by the double web column 110. The vertical hunting 152 has the effect of reinforcing the joining portion of the double web column 110 and the horizontal member 151 and guiding the position of the plastic hinge to the inside of the horizontal beam 130 from the outer peripheral surface of the double web column 110 . It is possible to select whether to reinforce the vertical hunting 152 in accordance with the magnitude of the shear force acting on the horizontal beam 130.

The joining structure 100 of the joining structure of the joining part of the double web of the present invention and the horizontal beam is made as follows.

Referring to FIG. 3, the lower plate 151b is welded to the web 111 and the flange 112 of the double-web pillar 110, respectively. As described above, the vertical knuckle 152 may be formed on the lower surface of the lower plate 151b according to the magnitude of the action shear force. (See Fig. 5)

The welding sequence is as follows. The lower plate 151b is joined to the web 111 and the lower plate 151b of the double web pillar 110 by double-sided fillet welding Wf. When the vertical hook 152 is further engaged, the vertical hook 152 is engaged with the lower surface of the web 111 and the lower plate 151b of the double web post 110 by double-sided fillet welding Wf.

Although not shown, when the underground structure is constructed through the top-down method, the bottom wall 151 and the column are first installed and then the ground is excavated, so that the lower plate 151b is coupled to the double- And can not be brought into the field in a state where Therefore, when the underground structure is constructed through the top-down method, the lower plate 151b is manufactured by attaching a back damper at a factory, and the web 111 and the flange 112 of the column 110, The face is grooved. When the vertical knife 152 is engaged, one side of the vertical knife 152 is double-sided fillet welded to the lower face of the lower plate 151b at the factory.

When the welding of the lower plate 151b is completed, the double web pillar 110 is installed in the ground or the structure in the longitudinal direction. The technique of installing the double web pillar 110 on a ground or a structure is well known in the technical field of the present invention, and thus a detailed description thereof will be omitted.

The horizontal beam 130 generally has a structure in which both ends of the horizontal beam 130 are coupled to the double web pillars 110 so as to firmly support the static and dynamic loads of the building. In the following description, both end portions of the horizontal beam 130 are coupled to the double web pillars 110, respectively.

The horizontal beam 130 is mounted on the upper surface of the lower plate 151b and the lower surface of the horizontal beam 130 and the upper surface of the lower plate 151b are coupled to each other with the high-

The horizontal beam 130 is lifted using a crane so that its both ends are mounted on the upper surface of the lower plate 151b and the horizontal beam 130 and the lower plate 151b are supported by the bolts B and N, By fastening the coupling hole 133 of the horizontal beam 130 and the coupling hole 153 of the lower plate 151b.

The upper plate 151a is mounted on the upper surface of the horizontal beam 130 and the upper surface of the horizontal beam 130 and the lower surface of the upper plate 151a are coupled with the bolts B and N (See Fig. 4)

The upper plate 151a is welded and joined to the web 111 and the flange 112 of the double web post 110 as shown in Fig. The upper plate 151a is manufactured by attaching a back damper (not shown).

The upper plate 151a applies a one-sided groove weld Wg to the web 111 and flange 112 of the column 110 in the field. Of course, fillet welding may be selectively applied depending on the required strength of the joint. The reason why the rear damper of the upper plate 151a is manufactured in the factory and then welded in the field is to avoid interference between the back damper and the horizontal beam 130 required for groove welding Wg and to facilitate field welding.

The joining structure 100 of the joining part of the double-web column and the horizontal beam of the double-web column according to the present embodiment is provided with the joining part 150 connecting the horizontal beam 130 to the double-web column 110, It is possible to distribute the stress concentration that may be generated at the joining portion of the double web column 110 and the horizontal beam 130, thereby reinforcing the joining structure of the double web column 110 and the horizontal beam 130.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

1: Coupling structure 110: Double web pillar
130: Horizontal beam 150:
111: web 151: horizontal member
112: flange 151a: upper plate
F: filler 151b: bottom plate
S: Outside length 152: Vertical hunting
131: web 153: engaging ball
132: flange P: fixed portion
132a: Upper flange E:
132b: Lower flange
133: Combination ball

Claims (5)

A double web column installed in a vertical direction;
A connecting port coupled to a web and a flange of the double web post in a direction parallel to a flange of the double web post; And
And a horizontal beam inserted and fixed to the connector,
The connector includes:
Wherein the double web column is formed so as to disperse stress concentration that may be generated in a joint portion between the web and the flange of the double web column.
The method according to claim 1,
The connector includes:
The width of the web of the double web column becomes wider toward the web of the double web column so that the concentration of stress that may be generated in the joining portion of the web and the flange of the double web column is dispersed in the direction away from the web and flange of the double web column And a horizontal member which is formed to be constantly formed. The joining structure of the joining part of the double-web column and the horizontal beam.
3. The method of claim 2,
The horizontal member
And an upper plate and a lower plate symmetrically formed to be coupled to upper and lower surfaces of the horizontal beam,
Wherein each of the upper plate and the lower plate includes:
A securing portion coupled to the web and flange of the double web post; And
And a projecting portion extending from the fixing portion to the horizontal beam and having an end portion formed to have the same width as the width of the horizontal beam.
The method of claim 3,
In the horizontal member,
Characterized in that a vertical haunch is formed so that the shear force acting on the horizontal beam can be dispersed by the double web column.
A method of joining a joining structure of a joining part of a double web column and a joining part of a horizontal beam,
Welding the lower plate to the web and flange of the double web post;
Installing the double web column in a longitudinal direction;
Placing the horizontal beam on an upper surface of the lower plate and coupling the lower surface of the horizontal beam and the upper surface of the lower plate with a bolt;
Placing the upper plate on the upper side of the horizontal beam and coupling the upper side of the horizontal beam and the lower side of the upper plate with the bolts; And
And joining the upper plate to the web and flange of the double web column to join the joining structure of the joining structure of the joining structure of the joining part of the double web column and the horizontal beam.
KR1020130153864A 2013-12-11 2013-12-11 Connecting structure and method between weak axis of double web steel column and beam KR20150068532A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105464210A (en) * 2015-07-13 2016-04-06 贵阳铝镁设计研究院有限公司 Connecting form of steel beam and I-shaped-section column in weak axis direction and beam-column connecting structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105464210A (en) * 2015-07-13 2016-04-06 贵阳铝镁设计研究院有限公司 Connecting form of steel beam and I-shaped-section column in weak axis direction and beam-column connecting structure

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