JP2914189B2 - RC tube frame with damping damper and method of construction - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial application] RC with seismic dampers on pillars
The present invention relates to a tube structure.

[0002]

2. Description of the Related Art Conventionally, high-rise RC buildings have many advantages in terms of habitability and cost, and have been mainly used for high-rise housings.

[0003]

However, there are the following problems.

(A) If an office building is made of a high-rise RC building and the strength of the beam is to be increased by the RC building, the cross-sectional area of the beam becomes large and it is difficult to design a large span.

[0005] (b) In the case of a tube frame which is frequently used in a high-rise building, the beam is short, and the shear span ratio of the beam is reduced, which also makes the design difficult.

(C) The RC building has a heavy weight and is disadvantageous in terms of earthquake resistance with respect to the steel frame building.

[0007] It is an object of the present invention to provide a building excellent in earthquake resistance by incorporating a vibration damper into a column of an RC tube frame.

[0008]

[Means for Solving the Problems] In the RC tube frame
Incorporate vibration dampers in some columns
And increase the shear span ratio of the beam and increase the toughness.
In the event of an earthquake, the frame is not vibrated rigidly, and
An improved structure.

[0009] Damping damper may be used a honeycomb dampers, may be used joint damper, it may be used a damper utilizing viscous resistance of the oil, preferably
Honeycomb dampers are suitable .

Application to precast RC tube frame
The method of construction is to use precast RC beams, columns and
Manufacturing unit members composed of
Assemble the floor members, construct the floor slab, and use it as a moment column.
Attach dampers and construct outer walls.

[0011]

The shear strength and plastic deformation of RC beams are greatly affected by the ratio of the shear span a (1/2 of the total beam length) to the effective d of the beam, that is, the shear span ratio a / d. Generally R
In the C-tube structure, the beam is short, so the shear span ratio is small and the shear strength is large, but the toughness is small.
Buildings vibrate rigidly and have poor habitability and earthquake resistance.

Therefore, a damper is incorporated into some columns of the tube frame, and when a horizontal force acts during an earthquake , the bending moment
Moment column that allows Therefore the moment column
Does not bear the axial force, so the beam length is substantially longer.
Ri, shear span ratio of the beam is larger ing. Therefore, in the event of an earthquake, the vibration damping capacity of the entire building is improved,
Seismic resistance can be improved. Further, the moment column incorporating the damper can amplify the deformation of the damper due to the bending deformation of the beam and further improve the effect of the damper.
Further, since the moment column incorporating the damper does not bear the axial force as described above, it can be omitted in the first floor, and the entrance portion can be widened, which is advantageous for architectural planning.

[0013] If the tube frame is precast, high-strength concrete with stable quality can be used, so that the construction can be rationalized and the construction period can be shortened.

[0014]

FIG. 11 is a plan view of an outer tube and an inner core wall frame to which the present invention is applied, and FIG. 12 is a plan view of a double tube frame to which the present invention is applied. FIG. 13 is a part of an elevation view of a tube frame to which the present invention is applied.

FIG. 1 is a stress diagram of a tube frame during an earthquake, in which a moment column 3 incorporating the vibration damper of the present invention is applied to every other column . Symbol 2 indicates a vibration damper.
It is a pillar that cannot be inserted . Figure 2 is a stress diagram of the earthquake of tube frame that does not use the present invention, the pillars of every other as compared with FIG. 1, since no a moment pillar 3, small shear span ratio of the beam 1, acts shear force shows a large Do Rukoto. FIG. 3 is a diagram of a honeycomb damper 4 as an example of a damper incorporated in the moment column 3. FIG. 4A is a diagram of a bell damper 5 as an example of a joint damper, and FIG. 4B is a diagram of a drum damper 6. In addition, a shock absorber used for a vehicle suspension or the like can use a damper that utilizes the viscous resistance of oil accompanying the movement of a piston. FIG. 5 is a diagram showing how the effect of the damper is amplified by bending deformation of the beam 1 . FIG. 6 shows 1F
FIG. 4 is a diagram in which the moment column 3 is omitted and the entrance section is widened.

Next, the construction method when the tube frame is precast will be described step by step.

(A) First, as shown in FIG.
A unit member is manufactured using the moment column 3.

(B) As shown in FIG. 8, the unit members are assembled.

(C) As shown in FIG. 9, a floor slab is constructed. The figure shows an example of a deck slab with steel beams.

(D) As shown in FIG. 10, a damper is attached to the moment column 3.

(E) Construction of an outer wall.

[0022]

The effects of the present invention are as follows.

(A) Since the moment column is employed, the shear span ratio of the beam is increased, and the ability of the building to be attenuated in the event of an earthquake is improved, thereby improving the livability and seismic resistance.

(B) The moment column incorporating the damper can amplify the deformation of the damper due to the bending deformation of the beam and further improve the effect of the damper.

(C) Since the moment column incorporating the damper does not bear the axial force, it can be omitted on the first floor, and the entrance can be widened, which is advantageous for architectural planning.

(D) By precasting the tube frame, high-strength concrete with stable quality can be used, and the construction can be rationalized and the construction period can be shortened.

[Brief description of the drawings]

FIG. 1 is a stress diagram during a seismic event of a tube frame to which a moment column is applied, in which every other column incorporates the damping damper of the present invention.

FIG. 2 is a stress diagram at the time of an earthquake of a tube frame that does not use a moment column in the column arrangement of FIG. 1;

FIG. 3 is a view of a honeycomb damper.

FIG. 4A is a diagram of a bell damper as an example of a joint damper. (B) It is a figure of a drum damper as an example of a joint damper.

FIG. 5 is a diagram showing how a damper effect is amplified by bending deformation of a beam.

FIG. 6 is a view in which a moment column is omitted and an entrance portion is widened in 1F.

FIG. 7 is a diagram in which a unit member is manufactured using beams, columns, and moment columns.

FIG. 8 is a view in which unit members are assembled.

FIG. 9 is a diagram in which a floor slab is constructed, and is an example of a deck slab made of steel beams.

FIG. 10 is a diagram showing a damper attached to a moment column.

FIG. 11 is a plan view of an outer peripheral tube and an inner core wall frame to which the present invention is applied.

FIG. 12 is a plan view of a double tube frame to which the present invention is applied.

FIG. 13 is a part of an elevation view of a tube frame to which the present invention is applied.

[Explanation of symbols]

1 ... beam, 2 ... column, 3 ... moment column, 4 ...
..Honeycomb dampers, 5: bell dampers, 6: drum dampers

Continuation of the front page (56) References JP-A-6-240762 (JP, A) JP-A-6-136990 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04H 9 / 02-9/02 301 E04B 1/18-1/24

Claims (2)

(57) [Claims] 1. In an RC tube frame, a seismic damper is incorporated into some of the columns to form a moment column, the shear span ratio of the beam is increased, and the toughness is increased.
An RC tube frame incorporating a vibration damper, characterized by improved livability and seismic resistance without vibrating rigidly . 2. A unit member composed of a precast RC beam, a column, and a moment column is manufactured, the unit member is assembled, a floor slab is constructed, a damper is attached to the moment column, and an outer wall is constructed. A method of constructing an RC tube frame that incorporates a vibration damper.