JPH1046865A - Method for fixing damping wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost of building construction, in which a damping wall to be vertically disposed is directly fixed in a vertical plane, by a method wherein a steel plate having the same thickness as an inner wall steel plate fixed to the upper floor side is protruded under a beam of the upper floor, and a damping inner wall steel is disposed just render the steel plate, and a connection steel plate is attached to both sides of the quake control steel plate, and three steel plates are tightened using high-strength bolts to form them into a single body. SOLUTION: A steel plate 21 having the same thickness as an inner steel plate 5 to be fixed to the upper floor or a reinforce part 22 thereof is provided under a beam 2 of the upper floor, and a damping inner wall steel plate 5 is disposed just under the plate 21. A connection plate 24 is attached to both sides of the plate 5 and three steel plates 5, 21, 22 are tightened by means of high-strength bolts 14 to form them into a single body. In this method, the plate 5 is directly joined and hence stress is transmitted more smoothly in comparison with a joint of T-shaped flange so that resistance loss of the damping wall can be eliminated. Since the joint of the bolt 14 has two friction surfaces, the number of bolts can be reduced to half, as compared with a conventional method and flanges at the top and bottom of the quake control wall are not required and hence manufacturing cost can greatly reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention improves seismic safety by incorporating an energy absorbing device into a structure to enhance damping performance, and effectively suppresses vibration of the structure caused by wind and other dynamic external forces. It is about possible damping structures.

[0002]

2. Description of the Related Art In order to improve the seismic safety of a building structure and improve the living performance due to the vibration of the structure due to wind or other dynamic external force, it is extremely effective to increase the damping performance of the structure. Some things have been pointed out for quite some time, and have been applied to actual structures in the country since the 1980's. As a specific solution, a viscous damping device having a wall shape such as "vibration damping wall" (Japanese Patent Publication No. 2-1947) has been put to practical use for building structures.

In particular, since the Great Hanshin Earthquake in 1995, the importance of increasing the damping performance for improving the seismic performance of high-rise buildings and steel structures having low damping performance has been recognized. In particular, the effectiveness of the above-mentioned damping wall has been recognized, and the number of cases where it is adopted for actual structures is increasing.

[0004]

The damping performance that can be added to a structure is proportional to the number of damping walls to be arranged, and its cost is also proportional to the number of damping walls used. The quantity that can be used will be limited.
There are also cases where it is necessary to give up the use of the damping wall itself due to economic constraints. Therefore, from the viewpoint of building safer buildings and cities, how to reduce the cost of damping walls and make it easier to adopt this excellent damping device for more structures is a social issue. This is an important issue.

When the conventional damping wall is designed to be replaceable, when the lower end fixing portion is exposed on the floor slab, the finished wall thickness of the entire damping wall is increased due to the fixing portion, which is valuable. There was also a problem that a large floor area was wasted and hindered the architectural planning.

An object of the present invention is to reduce the cost of the damping wall construction method and to improve the structure so that it can be used more easily in a building plan in order to promote the spread of a damping structure having high seismic safety performance. It was done as.

[0007]

According to the present invention, there is provided a "damping wall main body portion" which has a structure of a damping wall which exhibits an energy absorbing function.
By separating and recognizing it as a "fixed part" that integrates with the structure, and improving the fixed part to a more rational fixing method different from the conventional fixing method, the dynamic performance of the damping wall The cost reduction of the whole damping wall construction method will be realized without affecting the building.

In the conventional method of fixing a damping wall, a horizontal flange steel sheet perpendicular to the wall sheet steel is formed on both upper and lower ends of an inner wall and an outer wall steel sheet constituting a main body of the damping wall, and is provided in advance on the building side. The horizontal flange is integrated with the flange of the steel beam or the fixing flange connected thereto and the upper and lower ends of the damping wall with high-strength bolts.

On the other hand, the present invention denies the concept of connection by a horizontal flange, and directly fixes a damping wall plate disposed in a vertical direction in a vertical plane.

In the method according to the first aspect, a steel plate having the same thickness as the steel plate on the inner wall to be fixed to the upper floor side is protruded below the upper floor side beam,
The steel plate on the inner wall of the damping wall is placed immediately below, the connecting steel plates are placed on both sides, and the three steel plates are integrated by fastening them with high-strength bolts at the construction site. Further, the lower floor side can be fixed in the same manner, or when driving into the floor slab, a conventional flange method can be adopted.

The method of claim 2 is a further simplified method of the method of claim 1 in which the connecting projecting steel plate fixed to the floor or beam on the upper floor is eliminated, and the steel plate on the inner wall of the damping wall is raised. This is a method of directly welding to the lower flange of the beam on the floor side or the fixing steel plate.

[0012] Since the welding of the second aspect of the present invention is an upward field welding when the welding is performed at the steel frame building position, the welding operation is difficult and a defect is likely to occur. By performing the welding before the erecting work in the welding work area provided on the ground part, the welding can be performed as a horizontal welding in a place where the welding environment is arranged, so that highly reliable joining can be performed.

[0013] Since the welding on the lower side of the vibration control wall by the method of claim 2 is directed downward, it can be performed at the position of the steel frame on each floor. When building a steel frame, the damping wall was pushed in (shortened) by about 3 cm in the height direction, built in, and after the upper beam was built, the temporary jig was removed and returned to the specified height.
After adjusting the position of the damping wall, weld the lower end.

The above description is directed to a case of a newly-constructed structure. However, for an existing structure, by providing a fixed portion similar to the newly-constructed structure on the structure side or by providing the fixed portion. The method for fixing a vibration damping wall according to the present invention can be applied as it is.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing embodiments.

As shown in FIGS. 1 (partial details, FIGS. 2 to 4) and FIG. 5 (partial details, FIGS. 6 to 7), a conventional method of fixing a vibration damping wall is shown in FIG. Horizontal flange 10
Also, a horizontal flange 11 is provided at the lower end of the outer wall steel plate, and the horizontal flange 11 is integrated with a steel beam flange (FIG. 3) or a connecting member (15, 16 in FIGS. 5 to 7) on the building side by tightening with a high-strength bolt. Is used.

This method requires a large number of bolts because the high-strength bolt joint is a one-side friction joint for both the upper and lower fixing parts. Also, when the connecting member 16 is provided above the floor slab in consideration of the possibility of replacement as shown in FIG. 7, the flange width is exposed at the joint part at the lower part of the damping wall. The problem is that the finish wall thickness of the damping wall becomes extremely large when the damping wall is provided.
This problem of the wall thickness is a very important issue in the architectural planning because the architectural design itself may not be realized due to the thickness in some cases.

In contrast, the method of claim 1 of the present invention
As shown in FIG. 8 (partial detail drawings 9 to 10), the inner wall steel plate 5 to be fixed to the upper floor side or the steel plate 22 reinforced
A steel plate 21 of the same thickness as the part is provided under the upper floor side beam, a steel plate on the inner wall of the damping wall is placed immediately below it, and a connecting attachment plate is placed on both sides thereof, and three steel plates are placed on the construction site. Fasten with high strength bolts and integrate. In this method, the joining of the high-strength bolt is 2
It is characterized by surface friction, the tightening direction is horizontal, and no protrusions that exceed the thickness of the damping wall body are eliminated.

The method of claim 2 is a further simplified and streamlined method of claim 1. As shown in FIGS. 11 to 12, a method of fixing the upper part of the damping wall is to directly weld the steel plate of the inner wall of the damping wall to the lower flange of the beam on the upper floor side or the fixing steel plate.

If the welding operation is carried out at the position of the steel frame, the welding operation will be upward, so that the welding operation is difficult and there is a high possibility that defects will occur. By performing the welding in the provided welding work area before the building work, the welding can be performed as a horizontal or downward welding in a place where the welding environment is arranged, so that the highly reliable joining similar to the factory welding can be performed.

The welding on the lower side of the damping wall by the method of claim 2 is downward welding as shown in FIGS. 13 and 14, and can be performed at the damping wall installation position on each floor. In this field welding, since the joining member 33 is always thicker by the effective gap than the required thickness (same as the thickness of the inner wall steel plate) of the outer wall steel plate 6 of the damping wall, the stress of the welded portion is greater than the stress of the outer wall steel plate. Be relaxed.

The work procedure for installing the damping wall by welding is as follows. First, the damping wall integrated with the upper floor beam is pushed in (shortened) by about 3 cm in the height direction and built together with the upper floor beam. After fixing the upper beam, remove the temporary jig, return the damping wall to a predetermined height, adjust the position of the damping wall, and then weld the lower end. At this time, since the out-of-plane rigidity of the damping wall is not high, the position adjustment in the out-of-plane direction can be easily performed. Adjustment of the position in the in-plane direction is easy because the damping wall itself is movable.

The joining method described above can be applied to the existing structure as well as a newly-built structure by providing a fixed portion similar to that of the newly-constructed structure on the structure side or by providing that portion. The method of fixing the diaphragm can be applied as it is.

Further, the damping wall is not limited to a viscous damping device containing a viscous fluid, but may be a case where a viscoelastic body is adopted between the inner and outer wall steel plates or a case where lead or other plastic metal is interposed. Even so, the joining method of the present invention can be similarly applied.

[0025]

The improved high-strength bolt fixing method according to the first aspect has the following advantages as compared with the conventional flange-integrated high-strength bolt joint. Since the inner wall steel plates are directly joined, the transmission of the stress becomes smoother than the joining of the conventional T-shaped flanges, and there is no possibility of the resistance loss of the damping wall, and the reliability of the joint is improved. Since high-strength bolted joints produce two-sided friction, the number of bolts may be half that of the conventional method. Since the upper and lower flange portions of the damping wall are not required, the manufacturing cost of the damping wall itself can be significantly reduced. Even if the lower end joint is provided above the floor slab, since the flange width does not protrude, the finished size of the damping wall does not become thick, and no obstacle in building planning occurs. Since the direction of tightening of the high-strength bolts is horizontal, the tightening machine does not hit the upper and lower beam flanges, and the tightening operation becomes extremely easy.

The welding type fixing method according to the second aspect has the following advantages. Since the inner wall steel plates are directly joined, the transmission of the stress becomes smooth, as in the method of the first aspect, and there is no danger of resistance loss of the damping wall. Since connecting members are not required at the upper and lower flange portions of the damping wall and at the side of the building beam, the cost of manufacturing the damping wall itself and the cost of manufacturing the joining members can be significantly reduced. Similar to the method of the first aspect, since there is no protrusion beyond the thickness of the main body of the damping wall, the finished size of the damping wall does not become thick, and no obstacle in building planning occurs.

As described above, the method of fixing the damping wall to the building according to the present invention not only rationalizes the stress transmission mechanism but also simplifies the manufacturing and fixing of the damping wall itself. Instead of reducing the mechanical performance, the reliability is improved, and the cost required for the entire damping wall construction method can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is an elevation view and a cross-sectional view showing a conventional method of mounting a damping wall (1) (when directly connected to a beam).

[Fig. 2] Conventional mounting method of the upper part of the damping wall (1) Detailed sectional view showing section A in Fig. 1 (single inner wall type)

Fig. 3 Conventional mounting method of the upper part of the damping wall (1) Detailed cross-sectional view showing part A in Fig. 1 (double inner wall type)

Fig. 4 Conventional mounting method for the lower part of the damping wall (1) Detailed sectional view showing section B in Fig. 1 (single inner wall type)

FIG. 5 is an elevation view and a cross-sectional view showing a conventional mounting method (2) (when a connecting member is interposed) of the damping wall.

FIG. 6 is a conventional mounting method of an upper part of a vibration control wall (2). A detailed cross-sectional view showing a portion C in FIG.

FIG. 7: Conventional mounting method for the lower part of the damping wall (2) Detailed sectional view showing a portion D in FIG. 5 (single inner wall type)

FIG. 8 is an elevation view and a sectional view showing a bolt fixing method in a vertical plane of a vibration control wall.

FIG. 9 is a detailed sectional view showing the upper portion (part E in FIG. 8) of a bolt fixing method in the vertical plane of the damping wall (single inner wall type).

FIG. 10 is a detailed sectional view showing a lower portion (a portion F in FIG. 8) of a bolt fixing method in a vertical plane of a damping wall (single inner wall type).

FIG. 11 is an elevation view and a sectional view showing a welding and fixing method of the vibration damping wall.

FIG. 12 is a detailed sectional view showing the upper part (part G in FIG. 11) of the welding and fixing method of the damping wall (single inner wall type).

FIG. 13 is an elevation view and a cross-sectional view showing a welding and fixing method of the damping wall.

FIG. 14: Welding and fixing system lower part of damping wall (H in FIG. 13)
Section) (Single inner wall type)

[Explanation of symbols]

1: Damper wall 2: Beam on the upper floor of the building
3: Beam on lower floor side of building 4: Steel plate on inner wall of control wall 5: Steel plate on inner wall of control wall
6: Steel plate on the outer wall of the damping wall 7: Reinforcement bar outside the steel plate on the outer wall 8: Viscous fluid storage
9: Damping wall end side plate 10: Damping wall upper flange 11: Damping wall lower flange 12: Damping wall flange welded part 13: Building side beam flange 14: Fixing high strength bolt 15: Upper beam connecting member
16: Lower beam connecting member 17: Welding portion of connecting member 18: Fireproof coating and finishing material 21: Connecting plate for fixing bolt 22: Inner wall steel plate upper reinforcing portion 23: Lower steel plate for fixing bolt 24: Supplemental plate for fixing bolt 27: Connection plate welding portion 31: Internal steel plate upper reinforcing portion 32: Internal steel plate upper welding portion 33: Lower steel plate for welding fixation 34: Lower steel plate welding portion

Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location E04B 2/56 632 E04B 2/56 632C 632J 632M 632W 632K 643 643A F16F 15/02 8919-3J F16F 15/02 S

Claims (4)

[Claims] At least one wall plate fixed to the upper floor and suspended in parallel with a small gap between at least one wall plate fixed to the upper floor and two or more wall plates fixed to the lower floor and filled in the gap between both of them. Of a fixed part on the upper or lower floor of a damping wall composed of a viscous fluid, a viscoelastic body connecting the two wall plates, or a plastic metal such as lead interposed between the two wall plates. At least one is provided with a connecting plate fixed to the structure side and arranged in the same vertical plane as the wall plate, and this and the wall plate of the vibration control wall are joined by high strength bolts, Fixing method. 2. The damping wall according to claim 1, wherein at least one of the fixed portions on the upper floor or the lower floor is fixed to a steel beam or a steel plate fixed to the structure side, and the damping wall plate is provided. A method of fixing a vibration control wall, which is directly welded and joined. 3. The method according to claim 2, wherein the welding of the upper-floor beam and the wall plate of the damping wall is performed at an assembling work place provided on the ground floor of a construction site or on a work base. How to build a damping wall that integrates and then lifts the beam and damping wall to the specified floor. 4. A method of mounting a vibration damping wall, wherein an existing beam or a new steel frame member fixed to an upper floor and a lower floor in an existing structure is provided, and the beam is fixed by the method according to claim 1 or 2. .