JP2000240151A - Building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate demolishment work on the occasion of removal of a frame by bolting all connections between a beam and a column forming a first frame responsible for a vertical load. SOLUTION: The first frame 3 and second frame 4 of a frame 2 are erected on the ground G and connected to each other. Subsequently, the frame 4 is formed as a one having sufficient horizontal strength to support the entire frame 2, when an earthquake or wind pressure works on the frame 2. Subsequently the frame 3 is responsible for only a vertical load and can transmit a horizontal force acting during an earthquake or the like to the frame 4, and in the frame 3, all the positions between beams and columns are joined with bolts, thereby relieving the frame 3 of the requirement to have high proof stress and ductility by forming the frame 2 separately of the frames 3 and 4, simplifying bolt-connected portions between columns and beams forming the frame 3, and easing demolishment work when the frame 2 is to be removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building used as a building, a warehouse, a factory, and the like.

[0002]

2. Description of the Related Art As is well known, this type of building is generally made of reinforced concrete or steel.

[0003]

However, in recent years, construction waste has become a social problem, and there is a demand for recycling waste materials generated by dismantling buildings.
Conventionally, in steel-framed buildings, the dismantled steel material has been melted and reused (recycled) as electric furnace steel, but such recycling requires a great deal of labor and cost. However, actual use was not always large.

[0004] In view of such circumstances, the present invention provides a building that can reduce the labor and cost required for dismantling and can easily reuse waste materials generated by dismantling. The task is to

[0005]

Means for Solving the Problems To solve the above problems, the present invention employs the following means. That is,
The building according to claim 1, wherein the frame is separated into a first frame that receives a vertical load and a second frame that receives a horizontal force such as earthquake resistance and wind resistance, and a beam forming the first frame. All joints between the pillars are characterized by bolt joints.

[0006] Because of such a configuration, in this building, since the horizontal strength and toughness are not required for the first frame, the bolt connection between the beam and the column can be simplified.

The building according to a second aspect is the building according to the first aspect, wherein a split tee is joined to a pillar constituting the first frame so that a split tee projects laterally, and the first frame is formed. Is joined to the beam via the split tee.

[0008] Because of this configuration, in this building, a bracket provided on a pillar of a general steel-framed building can be replaced by a detachable split tee.

According to a third aspect of the present invention, the frame is divided into a first frame for receiving a vertical load and a second frame for receiving a horizontal force such as earthquake resistance and wind pressure resistance, thereby constituting the first frame. All joints between beams and columns
It is characterized by a pin connection.

[0010] Because of such a configuration, in this building, a high level of horizontal strength and toughness is not required for the first frame. Sometimes beams and columns can be easily separated.

According to a fourth aspect of the present invention, in the building according to any one of the first to third aspects, the girder constituting the first frame is formed of an H-shaped steel. An angle is bolt-joined to the web, and the small beam constituting the first frame is joined to the large beam via the angle by being bolt-joined to the angle.

[0012] Due to such a configuration, in this building, all the rib plates and splice plates used for joining the girders and the small beams in the general steel frame can be substituted by angles, and the number of members can be reduced. Can be reduced.

According to a fifth aspect of the present invention, there is provided the building according to any one of the first to fourth aspects, wherein in the first frame, all the column spans are equal.

[0014] Because of this configuration, in this building, the lengths of the girders can all be made uniform.

According to a sixth aspect of the present invention, in the building according to any one of the first to fifth aspects, the girder forming the first frame is formed of an H-shaped steel, and A stud bolt is provided in a protruding state on the flange, and the tip of the stud bolt is inserted into an insertion hole provided in the flange, and is positioned by a nut screwed from an upper surface and a lower surface of the flange. It is characterized by being fixed.

With this structure, in this building, when the floor is dismantled, the stud bolt can be removed from the lower surface of the flange located below the floor.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram schematically showing an embodiment of the present invention, and reference numeral 1 indicates a building. This building 1 has a structure in which a frame 2 has a first frame 3 and a second frame 4 erected on a ground G and connected to each other. Of these first and second frames 3 and 4, the second frame 4 has sufficient horizontal strength to support the entire frame 2 when seismic force or wind pressure acts on the frame 2. It is formed as what was done.
The first frame 3 is configured to be able to transmit only a vertical load and to transmit a horizontal force acting during an earthquake or the like to the second frame 4.

In the first frame 3, all joints between the beam and the column are bolted,
All pillar spans are equal. FIG. 2 is an enlarged view of a portion where the column 6 and the girder 7 in the first frame 3 are joined. As shown in the figure, the column 6 and the girder 7 are formed of H-shaped steel, and the split tees 10 and
Are provided so as to protrude laterally. The split tees 10,... Are all of the same size, and the girder 5 is joined to the column 6 via the split tee 10. Further, the joining of the column 6 to the foundation 11 is also performed via split tees 10,. Further, the joining between the girder 7 and the split tee 10, the joining between the split tee 10 and the column 6, and the joining between the split tee 10 and the foundation 11 are all performed by bolt joining.

As shown in the figure, stud bolts 14,... Are provided on the upper surface 13a of the flange 13 of the girder 7 in a protruding state. FIG. 3 is a diagram showing a cross section of the girder 7, and as shown in the figure, stud bolts 14,.
Is inserted into an insertion hole 15 provided in the flange 13 at the tip portion 14a, and the upper surface 1 of the flange 13
Nuts 16 and 1 screwed from 3a and lower surface 13b side
6 is fixed. The stud bolts 14,... Are arranged in a staggered manner along the girders 7, as shown in FIG.

FIGS. 5 and 6 are enlarged views showing the engagement between the large beam 7 and the small beam 18 in the first frame 3. As shown in the figure, an angle 20 having a substantially L-shaped cross section is joined to the side surface of the web 19 of the girder 7,
The small beam 18 is connected to the large beam 7 via the angle 20. Angle 20 of girder 7 and girder 18
Is performed by bolt joining.

As described above, the pillar 6, the girder 7, and the girder 18 are connected to each other, the deck plate 22 is arranged on the girder 7 and the girder 18, and concrete is further cast thereon. A floor structure 23 as shown in FIG. 7 is formed. In this case, the fitting of the floor reinforcing bars 24,... Arranged on the deck plate 22 on the girder 7 is, for example, as shown in FIG.

As described above, in the building 1, the frame 2
However, since the first frame 3 that bears a vertical load and the second frame 4 that bears horizontal force such as earthquake resistance and wind pressure are separated, the first frame 3 Therefore, a high level of horizontal strength and toughness is not required, and therefore, the bolted portions between the columns 6 and the girders 7 constituting the first frame 3 can be simplified. Thus, when the frame 2 is removed, the dismantling operation can be easily performed. Further, since there is no welded joint between the column 6 and the girder 7, there is no damage to the column 6 and the girder 7 at the time of disassembly. It can be used.

In the building 1, the split tee 10 is joined to the pillar 6 so as to protrude to the side, and the girder 7 is joined to the pillar 6 via the split tee 10. A split tee that can be detached from a bracket provided on a pillar of a general steel building.
0 can be substituted. Thereby, the pillar 6 can be easily reused as a steel material.

Further, in the building 1, an angle 20 is bolted to the web 19 of the girder 7, and the girder 18 is
Since it is configured to be joined to the girder 7 via the angle 20 by being bolted to the angle 20, a rib plate or a splice plate used for joining the girder and the small beam in a general steel structure is used. All the angles can be substituted with the angle 20, and the number of members can be reduced to facilitate the dismantling operation. Further, since the rib plate or the like is not welded to the girder 7, the girder 7 can be easily reused as a steel material.

In the building 1, since the column spans are all equal in the first frame 3,
All the lengths of the girder 7 can be made uniform, whereby the length of the steel material used for the girder 7 can be made all the same, and the steel material can be standardized and reused easily. It becomes possible.

Further, in the building 1, the stud bolts 14 are fixed to the flanges 1 of the girders 7 by the nuts 16,16.
When the floor structure 23 is dismantled, the stud bolt 1
Of the nuts 16 fixing the 4, the nut located on the lower surface 13 b of the flange 13 is removed, whereby
The stud bolt 14 can be easily removed from the flange 13, and the dismantling operation can be easily performed.

In this case, when the floor structure 23 is dismantled, a concrete cutter is used to dismantle the floor structure 23.
Is cut into small portions, and the lower surface 13 of the flange 13 is
Remove the nut 16 located at b. Then, the subdivided floor structure 23 is removed. Further, if the small beams 18 supporting the floor structure 23 are removed, the dismantling of the floor can be completed.

As described above, since the stud bolt 14 can be easily detached from the girder 7 when the floor is dismantled, unlike the related art, the steel beam and the concrete floor are integrated by the shear connector. It is not necessary to use a breaker when separating the existing parts, so that the dismantling operation can be facilitated and the generation of vibration and noise due to the use of the breaker can be avoided.

Conversely, by adopting a structure such as the building 1 for a building in which a partially disassembled floor is planned in the future, the efficiency of the demolition work can be improved, and vibration and noise can be improved. Can be avoided, and it is possible to satisfactorily cope with demolition work while using the building 1. In this case, for example, assuming that the floor structure 23 is to be dismantled in the dismantling portion 25 hatched by a two-dot chain line in FIG. 7, the fixing reinforcement 26 is provided at the boundary between the dismantling portion 25 and the other portions. If it is inserted and as shown in FIG. 8, the dismantling work can be performed without damaging the fixing portion of the floor reinforcing bar adjacent to the dismantling portion 25, which is preferable.

In the above embodiment, the structure of the joint between the column 6 and the girder 7 may be joined by using a pin joint instead of the structure shown in FIG. Absent. Also in this case, since it is not necessary to weld the column 6 and the girder 7, the dismantling work of the building 1 can be performed efficiently, and the column 6 and the girder 7 can be easily reused as steel. Can be done.

[0031]

As described above, in the building according to the first aspect, the frame is divided into the first frame for receiving the vertical load and the second frame for receiving the horizontal force such as earthquake resistance and wind pressure resistance. The first frame does not require a high level of horizontal strength and toughness, thus simplifying the bolted joints between the columns and girders that make up the first frame. can do. Thereby, when removing the frame, the dismantling operation can be easily performed. Also, in the first frame, since there is no welded joint between the column and the girder, there is no damage to these columns and girder during disassembly,
Steel materials used for these columns and girders can be reused without melting them into electric furnace steel materials.

[0032] In the building according to claim 2, in the first frame, the split tee is joined to the pillar so as to protrude to the side, and the girder is joined to the pillar via the split tee. Therefore, a bracket provided on a pillar of a general steel-framed building can be replaced by a detachable split tee. This makes it possible to easily reuse the pillars constituting the first frame as steel materials.

In the building according to the third aspect, since a high level of horizontal strength and toughness is not required for the first frame, the joint between the column and the girder constituting the first frame is simplified. In addition to being able to perform welding, it is not necessary to weld columns and girders, so dismantling work can be performed efficiently, and pillars and girders can be easily reused as steel materials. .

[0034] In the building according to the fourth aspect, the angle is bolted to the web of the girder constituting the first frame, and the small beam is bolted to this angle to be joined to the girder via the angle. The rib plate and splice plate used for joining large beams and small beams in general steel frame construction can be replaced with angles, reducing the number of members and reducing dismantling work. It can be facilitated. Further, since the rib plate or the like is not welded to the girder, the girder can be easily reused as a steel material.

In the building according to the fifth aspect, since the column spans are all equal in the first frame, the lengths of the girders can all be equalized, whereby the girders can be used for girders. The lengths of the steel materials are all uniform, and the steel materials can be standardized to facilitate reuse.

In the building according to the sixth aspect, the stud bolt is fixed to the insertion hole of the flange of the girder by a nut, so that when the floor is dismantled, the stud bolt is fixed. Can be easily removed from the lower surface side of the flange, whereby the disassembling operation can be easily performed. In addition, when the floor is dismantled, the stud bolt can be easily removed from the girder, so unlike the conventional method, a breaker is used to separate the part where the steel beam and the concrete floor are integrated by the shear connector. There is no need to avoid the occurrence of vibration and noise associated with the use of a breaker,
It can cope well with partial decomposition of floors while using buildings.

[Brief description of the drawings]

FIG. 1 is an elevational view of a frame of a building schematically showing an embodiment of the present invention.

FIG. 2 is an enlarged view showing an arrangement of columns and girders in a first frame in the building shown in FIG. 1;

FIG. 3 is a sectional view of the girder shown in FIG. 2;

FIG. 4 is a plan view of a girder shown in FIG. 2;

FIG. 5 is an enlarged sectional view showing an enlargement of a girder and a girder in a first frame in the building shown in FIG. 1;

6 is a sectional view taken along the line II in FIG. 5;

FIG. 7 is a plan view of a floor structure in a first frame in the building shown in FIG.

FIG. 8 is a plan view showing a state in which floor reinforcing bars are accommodated on girders in the floor structure shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Building 2 Frame 3 First frame 4 Second frame 6 Column 7 Large beam 10 Split tee 13 Flange 13a Upper surface 13b Lower surface 14 Stud bolt 14a Tip 15 Insertion hole 16 Nut 18 Small beam 19 Web 20 Angle 22 Deck plate 23 Floor Structure 24 Floor reinforcement 25 Planned dismantling part 26 Anchorage reinforcement

Claims (6)

[Claims] The frame is separated into a first frame that bears a vertical load and a second frame that bears a horizontal force such as seismic resistance and wind resistance, between the beams and columns that constitute the first frame. A building characterized in that all joints are bolted. 2. The building according to claim 1, wherein a split tee is joined to a pillar constituting the first frame so that a split tee projects laterally, and a girder constituting the first frame is: The building is joined to the beam via the split tee. 3. The frame is separated into a first frame that bears a vertical load and a second frame that bears a horizontal force such as earthquake resistance and wind resistance. A building characterized in that all joints are pin joints. 4. The building according to claim 1, wherein the girder forming the first frame is formed of an H-shaped steel, and an angle is bolted to a web of the H-shaped steel. A small beam forming the first frame is connected to the girder via the angle by being bolted to the angle. 5. The building according to claim 1, wherein all the column spans in the first frame are equal. 6. The building according to claim 1, wherein the girder forming the first frame is formed of an H-shaped steel, and a stud bolt protrudes from a flange of the H-shaped steel. The stud bolt is provided in a state, and its tip is inserted through an insertion hole provided in the flange, and is fixed in position by a nut screwed from an upper surface and a lower surface of the flange. The featured building.