JPH08151648A - Joint structure for column beam of steel structure - Google Patents

Abstract

PURPOSE: To simply adjust the fitting position of a beam member to a column member and shorten the construction period. CONSTITUTION: Beam receiving members 24 corresponding to beam fitting portions are protruded and fixed on the outsides of flanges 12a, 12b of a column I-steel 12. Y-shaped connection sections 26 are formed at the end sections of the first beam I-steels 16. The inner peripheries of forked portions 26a, 26b are formed larger in diameter than a column main reinforcement 28 and a hoop reinforcement 30 arranged around the outer periphery of the column I-steel 12. The beam receiving members 24 are fixed to the flanges 12a, 12b of the column I-steel 12, and a pair of the Y-shaped connection sections 26 are butted and mounted on the beam receiving members 24. The end sections of the second beam I-steels 18 are butted and fixed to the outsides of the butt portions of the Y-shaped connection sections 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column-column joint structure of a steel frame structure including a steel frame member and a steel beam member.

[0002]

2. Description of the Related Art Conventionally, as a column-beam joint structure in a frame structure such as a multi-storey building, for example, as disclosed in Japanese Unexamined Patent Publication No. 3-281844 (E04B 1/16), the outer circumference of the column is surrounded. There is one in which upper and lower diaphragms connected by a steel pipe are provided, and a steel frame beam is joined to the outer peripheral projection of each diaphragm and the outer surface of the steel pipe. This type of column-beam connection structure can also be applied to an underground frame, but in this case, columns are constructed in order from the bottom to the top in the excavation holes that have been excavated and formed by the sequential driving method, and the beams are laid on the floor. It will be installed for each height.

By the way, in recent years, when constructing an underground frame, there is a tendency to use a reverse striking method using a structure column. In this reverse striking method, a structure column is driven into the ground (Japanese Patent Laid-Open No. 5312/1993). After that, beams are sequentially attached from above to the true columns that have been excavated and driven into the ground. By the way, when the structure pillar is built by the above-mentioned upside-down construction method, since it is designed to be installed in a suspended state while holding the upper end portion of the steel pillar member to be the structure pillar, it is slightly It was difficult to secure the installation accuracy of the relevant true column due to the occurrence of such inclination. Then, joining the beam to the column core of the false column in which the building accuracy is not sufficiently ensured as described above also causes the beam position to be displaced. As a result, when the member length of the beam is adjusted by cutting or the like, or when a wall made of PC is installed under the beam between the true columns, it is possible to attach the wall so as to match the column core of the true column. It will be difficult.

Therefore, in the prior art, Japanese Patent Laid-Open No. 4-28521
As disclosed in Japanese Patent Publication No. 2 (E02D 29/04), by constructing a beam as a reinforced concrete beam and widening the beam width, and by configuring the beam as a flat beam having a width substantially equal to the column width of a reinforced concrete column with a built-in structure column. There is a structure in which the building error of the true column is absorbed by the widened portion of the flat beam.

[0005]

However, in the frame of the basement floor using such conventional structure columns, as described above, the reinforced concrete beam is widened to absorb the installation error of the structure columns. As a result, the amount of concrete placed on the reinforced concrete beams will increase significantly. For this reason, the construction cost is significantly increased in combination with the increase in the concrete placing work, and the beam weight is significantly increased.

Further, in the basement floor, since earth pressure is applied to the outer circumference, the axial compressive force due to this earth pressure acts on each beam member. However, in the flat beam, it is necessary to wait for the start of excavation in the lower floors until the placed concrete hardens and sufficient strength is exerted in order to receive the axial compressive force due to the earth pressure and the deflection due to its own weight. ,
There was a problem that the construction period would be extended.

In view of the above-mentioned conventional problems, the present invention provides a steel-beam-structured column / beam structure that can easily permit adjustment of the mounting position of the beam member to the column member and can shorten the construction period. It is intended to provide a mouth structure.

[0008]

In order to achieve the above object, the present invention provides a pair of beam receiving members projecting on both sides of a beam mounting portion of a steel frame member, and a pair of beam receiving members connected to the steel frame member. Y-shaped joints surrounding one half of the steel column member are formed at the ends of the first steel beam members, and the Y-shaped joints of the ends of the first steel beam members are mounted on the beam receiving member. The Y-shaped joints are arranged at the same time, and the ends of the second steel beam members that intersect the first steel beam members are joined to each other.

Further, it is desirable that the column-beam connection structure be applied to an underground structure by using the steel column member as a true column.

Further, it is desirable that the steel frame member constitutes a steel frame, steel concrete or steel reinforced concrete column, and the steel beam member constitutes a steel frame, steel concrete or steel reinforced concrete beam. .

[0011]

With the above structure, in the joint structure of the column and beam of the steel frame structure of the present invention, the pair of first column members connected to the steel column member are provided.
The steel beam member is designed to be placed on the beam receiving member of the steel column member at the Y-shaped joint portion at the end thereof. At this time, the Y-shaped joint portion and the steel column member are mounted on the beam receiving member. , That is, the relative position between the steel beam member and the steel column member can be changed. Therefore, when attaching the steel beam member to the steel column member, it is possible to easily adjust the attaching position of the steel beam member even when the installation accuracy of the steel column member is insufficient and the position is displaced from the regular position. You can Furthermore, where there are usually four joints between columns and beams, half the
Since there are multiple locations, the efficiency of construction can be improved.

Further, by applying the steel-framed pillar member in such a column-beam connection structure to an underground frame as a true-structured pillar, the misalignment of the true-structured pillar, for which it is difficult to secure the installation accuracy, is caused by the Y-shape. It can be absorbed at the joint to ensure a predetermined beam span.

Further, the steel-framed pillar member constitutes a steel-framed, steel-reinforced concrete or steel-framed reinforced concrete column, and the steel-beam member constitutes a steel-framed, steel-concrete or steel-framed reinforced concrete beam to construct a frame structure. Even in the case of the composite structure, the mounting position of the beam on the column can be adjusted.

[0014]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 1 to 3 show a first embodiment of a steel-column-structured beam-column joint structure 10 according to the present invention. FIG. 1 is a plan view of a main part, FIG. 2 is a side view of the main part, and FIG. 3 is a beam end part. It is an enlarged perspective view showing.

That is, as shown in FIG. 1, a column-beam joint structure 10 of the present embodiment includes a steel-framed reinforced concrete column 14 having a core of a column I-shaped steel 12 as a steel column member.
First I-shaped steel 16 for beam as second steel frame member and second
It is applied to a joint structure with the steel beam 20, 20 using the second beam I-shaped steel 18 as a steel beam member.

A pair of flanges 12 of the column I-shaped steel 12
The I-shaped steel for columns 12 is provided on the outside of each of a and 12b.
After the building is installed, the beam receiving member 2 corresponding to the beam mounting portion
4 is projected and fixed. As the beam receiving member 24, an angle piece having an L-shaped cross section is used, one surface of which is horizontally arranged as a supporting surface, and the other surface of which is the flanges 12a, 12a.
welded to b.

On the other hand, the first beam I-shaped steel 16 has a Y-shaped joint 26 shown in FIG. 3 at each end. Y
The shaped joint portion 26 is the upper and lower flanges 1 of the first beam I-shaped steel 16.
Bifurcated portion 26a formed continuously from 6a, 16b,
26b and a half-divided steel pipe 26c that is welded across the inner circumferences of the upper and lower bifurcated portions 26a and 26b. The bifurcated portions 26a and 26b are formed in an arcuate inner circumference, and the arcuate inner circumference has a column main bar 28 and a hoop bar 3 which are arranged so as to surround the outer circumference of the column I-shaped steel 12.
The diameter is larger than 0, and a predetermined gap is provided between them. Further, both ends of the steel pipe 26c are bent outward so as to form an Ω shape as a whole.
6d and 26d are arranged so as to be flush with the tips of the forked portions 26a and 26b.

The pillar-shaped I-shaped steel 12 is used as a true column of an underground frame constructed by the reverse driving method, and the pillar-shaped I-shaped steel 12 is driven into the ground and then the ground is excavated. The column I-shaped steel 12 is exposed, and the first beam I-shaped steel 16 and the second beam I-shaped steel 18 are attached to the column I-shaped steel 12.

First, the first beam I-section steel 16 is attached to the column I-section steel 12, and then the second beam I-section steel 18 is attached. At this time, the beam receiving member 24 is attached to the flanges 12a and 12b of the column I-shaped steel 12.
And the pair of Y-shaped joints 2 are fixed to these beam receiving members 24.
Place 6 in a butted state. At this time, when the Y-shaped joint portions 26 are butted against each other, the bent portions 26d, 26d at both ends of the steel pipe 26c are brought into contact with each other. The flange 12 that fixes the beam receiving member 24 is fixed.
A triangular reinforcing plate 24a is attached to the back side of a and 12b.

Then, the end portion of the second beam I-shaped steel 18 is butted to the outside of the butted portion of the Y-shaped joint portion 26,
The upper and lower flanges 18a and 18b of the second beam I-shaped steel 18
And the bifurcated portions 26a and 26b of the Y-shaped joint portion 26,
Bolts and nuts are fixed through the Y-shaped attachment plate 32 and the attachment plate 34 that is divided in half. The web 18c of the second beam I-shaped steel 18 is attached to the bent portions 26d, 26d of the steel pipes 26c that are butted against each other.
The bolts and nuts are fixed via the.

In this way, the first beam I-shaped steel 16 and the second beam I
After the beam I-shaped steel 18 is coupled, the column main bars 28 are arranged in a circular shape on the outer side of the column I-shaped steel 12, and the hoop bars 30 are provided so as to surround the column main bars 28. Further, a column form (not shown) (a PC column form in this embodiment) is installed outside the column main bar 28 and the hoop bar 30, and concrete 38 is placed in the column form to make the steel-framed reinforced concrete. The pillar 14 is constructed. The hoop muscle 30 can be omitted in the portion of the Y-shaped joint 26 where the steel pipe 26c is arranged.

With the above structure, in the joint structure of the column and beam of the steel frame structure of this embodiment, the I-shaped steel for column 12 and the I for the first beam are used.
When mounting the section steel 16 and the second beam I-section steel 18
The Y-shaped joint portion 26 of the beam I-shaped steel 16 is mounted on the beam receiving member 24 fixed to the column-shaped I-shaped steel 12, and the inner circumference of the Y-shaped joint portion 26 and the column. Since a gap is provided between the I-shaped steel 12 for columns, it is possible to move the mounting position of the I-shaped steel 16 for first beams with respect to the I-shaped steel 12 for columns. Therefore, even when the I-shaped steel 12 for pillars is insufficiently installed and is displaced from the regular position, the mounting position of the I-shaped steel 16 for the first beam, and further, the I-shaped steel 16 for the first beam, can be easily connected to this. The mounting position of the second beam I-shaped steel 18 can be adjusted. Therefore, even if the column I-shaped steel 12 is displaced, the column span can be optimized, and P formed in advance in a factory or the like can be used.
Installation of C wall etc. can be done easily.

Further, in this embodiment, the Y-shaped joint portion 26 is formed on the first beam I-shaped steel 16 and the beam receiving member 24 is fixedly mounted on the column I-shaped steel 12. First,
The second beam I-section steels 16 and 18 can be supported by the column I-section steel 12, and the construction cost can be reduced. Further, the number of joints between the pillars and the beams is usually four, but the number of the joints is two, which is half, and the efficiency of construction can be improved.

Further, in this embodiment, the first I-shaped steel 12 for columns is first
When the beam I-section steel 16 and the second beam I-section steel 18 are attached, the axial compressive force F of earth pressure acting on the outer periphery can be immediately received. Therefore, unlike the conventional flat beam, the excavation of the lower floor can be started at the same time as the mounting of the I-shaped steels 16 and 18 for the first and second beams, and the construction period can be greatly shortened.

Although the present embodiment discloses the case where the joint structure is applied to the underground frame by using the I-shaped steel 12 for columns as the true column, the joint structure on the ground floor is not limited to this. However, the present invention can be applied.

4 and 5 show a second embodiment of the present invention,
The same components as those of the above-described embodiment are designated by the same reference numerals, and overlapping description will be omitted. 4 is a plan view of relevant parts corresponding to FIG. 1, and FIG. 5 is a side view of relevant parts corresponding to FIG.

That is, in this embodiment, as the steel column member,
The cross-shaped steel 40 for pillars in which the flanges 40a, 40b, 40c, 40d are formed at the respective tip portions is used. In this cross-shaped steel 40, the beam receiving member 24 is provided outside the pair of opposed flanges 40a, 40b. It is designed to be fixed. The Y-shaped joint 26 of the first beam I-shaped steel 16 is placed on the beam receiving member 24 as in the first embodiment, and the second beam I-shaped portion 26 is mounted on the Y-shaped joint 26. Steel 18 is adapted to be connected.

Therefore, even in this embodiment, the beam receiving member 24 on which the Y-shaped joint 26 is placed is the cross-shaped steel 40 for pillars.
For the first beam I-shaped steel 16 and the second beam I-shaped steel 18
The mounting position of can be adjusted.

In this embodiment, the second beam I
The shaped steel 18 and the Y-shaped joint 26 are connected to each other by using the attachment plate 32 as in the first embodiment, while fixing the mounting plates 42 and 44 which are in contact with each other in the beam direction to each other.
The bolts and nuts are fixed to each other.

6 and 7 show a third embodiment of the present invention,
The same components as those in each of the above-described embodiments will be designated by the same reference numerals and redundant description will be omitted. 6 is a plan view of relevant parts corresponding to FIG. 1, and FIG. 7 is a side view of relevant parts corresponding to FIG.

That is, in this embodiment, as in the second embodiment, the pillar cross-shaped steel 40 is used as the steel frame pillar member. The pillar cross-shaped steel 40 has a pair of flanges 40a facing each other. Beam receiving members 46 are fixedly provided on both sides of 40b. The beam receiving member 46 is formed by dividing a trapezoidal plate having a long upper side into halves.
6 is welded across both sides of the flanges 40a, 40b and a web 40e connecting the flanges 40a, 40b.

In FIGS. 6 and 7, the first beam I-shaped steel 1 is used.
6 and the second beam I-shaped steel 18 are shown in a simplified manner, the first and second beam I-shaped steels 16 and 18 have the same configurations as those of the first and second embodiments.

[0033]

As described above, in the joint structure of the column and beam of the steel frame structure according to claim 1 of the present invention, the pair of first steel frame beam members connected to the steel frame column member are provided at their ends. So that it is mounted on the beam receiving member of the steel column member at the Y-shaped joint of
At this time, the relative position between the Y-shaped joint and the steel column member can be adjusted on the beam receiving member. Therefore, when attaching the steel beam member to the steel column member, even if the installation accuracy of the steel column member is insufficient and the steel frame member is displaced from the regular position, the first steel beam member and the second steel beam member can be easily attached. The mounting position of the member can be adjusted. Further, the number of joints between the pillars and the beams is usually four, but the number of the joints is two, which is half, and the efficiency of construction can be improved. In addition, since the strength of the frame can be maintained immediately after the first and second steel beam members are attached to the steel column member, the frame can be constructed without waiting for the curing of the concrete that is conventionally cast. , And shortening the construction period can be achieved.

Further, according to the second aspect of the present invention, by applying the steel frame column member to the underground frame as the structural column,
The above-mentioned Y is the amount of misalignment of the true column where it is difficult to secure the installation accuracy.
It can be absorbed by the shaped joint to ensure a predetermined beam span.

Further, according to a third aspect of the present invention, the steel column member constitutes a column made of steel frame, steel frame concrete or steel frame reinforced concrete, and the steel beam member is made of steel frame, steel frame concrete or Even when a beam made of steel-framed reinforced concrete is constructed to form a composite structure, various advantageous effects can be obtained in that the mounting position of the beam with respect to the column can be easily adjusted.

[Brief description of drawings]

FIG. 1 is a plan view of an essential part showing a first embodiment of the present invention.

FIG. 2 is a side view of essential parts showing a first embodiment of the present invention.

FIG. 3 is an enlarged perspective view of a beam end portion showing a first embodiment of the present invention.

FIG. 4 is a plan view of an essential part showing a second embodiment of the present invention.

FIG. 5 is a side view of essential parts showing a second embodiment of the present invention.

FIG. 6 is a main part plan view showing a third embodiment of the present invention.

FIG. 7 is a side view of essential parts showing a third embodiment of the present invention.

[Explanation of symbols]

 10 Connection Structure 12 I-Shaped Steel for Column (Steel Column Member) 14 Steel Reinforced Concrete Column 16 I-Shaped Steel for First Beam (First Steel Beam Member) 18 I-Shaped Steel for Second Beam (Second Steel Beam Member) 20 , 22 Steel beam 24 Beam receiving member 26 Y-shaped joint 40 Cross-shaped steel for column (steel frame member) 46 Beam receiving member

Claims (3)

[Claims] 1. A pair of beam receiving members are projectingly provided on both sides of a beam attachment portion of a steel column member, and a pair of first steel beam members connected to the steel column members are provided at ends of the steel column members. Y-shaped joints surrounding one half are formed respectively, and the Y-shaped joints of the ends of the first steel beam members are placed on the beam receiving member, and the first steel frames are attached to these Y-shaped joints. A column-beam connection structure of a steel frame structure, characterized in that the ends of a second steel beam member that intersects the beam member are joined. 2. The column-beam connection structure of a steel structure according to claim 1, wherein the steel column member is a true column and is applied to an underground frame. 3. The steel frame member constitutes a steel frame, steel concrete or steel reinforced concrete column, and the steel beam member constitutes a steel frame, steel concrete or steel reinforced concrete beam. The connection structure of column and beam of the steel structure according to claim 1.