JPH05311924A - Aerodynamic damping structure in building of long-span roof - Google Patents

Abstract

PURPOSE:To prevent the vibrations of a building due to the generation of vortexes by disposing a vortex generators each comprising a bar-shaped body in specified size at fixed position at the corner sections of a long-span roof. CONSTITUTION:The aerodynamic damping structure of the building 1 of a long-span roof is constituted in such a manner that four vortex generators are arranged under the state, in which the vortex generators are projected in the oblique direction from the outer circumferential ends 2a of the roof 2, and connected by connectors 4. The vortex generators 3 are formed in a bar-shaped body having a square cross section while the width of one side is set to one tenth of the height H of the building and length is made slightly longer than one side of the roof and the vortex generators are disposed at the intervals 2 in size, of one fifth of building height H in the positions of arrangement. When a wind blows from the front of the building, air vortexes are generated near the windward front section of the roof 2, but the generation and growth of the vortexes of building 1 itself are prevented by vortex generators 3a themselves or vortexes generated from the vortex generators, thus obviating the vibrations of building 1 itself.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a ventilation duct for vibration control in a building with a large span roof.

[0002]

2. Description of the Related Art In recent years, many pavilions for multipurpose events and large span roof buildings intended for use as athletic stadiums have been constructed.

[0003]

In this building with a large span roof, the wind blown from a specific direction is blocked by the wall surface of the building when the location is windy or when there is a strong wind such as a typhoon.
When a vortex of flowing air is generated near the windward front edge of the roof surface and this Karman vortex causes the roof surface to vibrate, and because the roof has a large span, the vibration is greatly amplified and acts on the entire building. Had the problem that there is.

On the other hand, the conventional design for the wind mainly considers the bearing capacity of the structure, but in order to solve the vibration in such a building with a large span roof, the pressure receiving wall surface is affected by the wind. The inlet of the ventilation passage is provided near the position where the maximum positive pressure received by the Then, spray on the vortex,
Methods for preventing the generation and growth of vortices have been proposed.

However, this means has a problem in that the space that can be used as a living space in the building is reduced by forming the ventilation passage in the building, which is not economical from the viewpoint of the size of the living space. Was. SUMMARY OF THE INVENTION It is an object of the present invention to solve such conventional problems, and to provide an aerodynamic vibration control structure capable of reducing and preventing vibration due to vortices generated in a building with a large span roof and increasing spatial utilization. It is what

[0006]

In order to achieve the above object, in the present invention, in a building having a large span roof, a predetermined distance from the outer peripheral edge is projected along the outer peripheral edge of the roof of this building. And a rod-shaped vortex generator is provided.

Incidentally, the vortex generator
Is a bar with a square cross section, and the width of one side is 1 / of the building height.
It is 10 and it is desirable to have a configuration in which it is projected and arranged at intervals of 1/5 of the building height.

【Example】

A preferred embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show one embodiment of the present invention. FIG. 1 is an elevation view of a building having a large span roof in this embodiment, and FIG. 2 is a plan view of FIG.

In the present embodiment, in a building having a large span roof 1 in the drawing, four buildings are provided along the outer peripheral edge 2a of the roof 2 of the building 1 so as to project a predetermined distance from the outer peripheral edge 2a. A rod-shaped vortex generator-3 is arranged. Each of the vortex generators 3 has a rod shape with a square cross section in this embodiment, and the width of one side is the building height H.
1/10, the length is slightly longer than one side of the roof 2, and the building height H
A predetermined connecting tool 4 is provided at an interval of 1/5 and is arranged so as to project obliquely upward from the outer peripheral end 2a of the roof 2.

In the present embodiment having the above-mentioned configuration, FIG.
Assuming that the wind W is blowing from a specific direction (downward direction in the figure) as shown in (1), the vortex of flowing air is generated near the windward front edge of the roof surface due to the wind W hitting the front of the building. However, in the present embodiment, the first outer edge 2a of the roof is
The vortex generator-3a is arranged so as to project, and the first vortex generator-3a itself or the vortex generated by the first vortex generator-3a effectively generates and grows the vortex by the building itself. It is possible to reduce or prevent the vibration of the entire roof when the wind is strong.

Further, unlike the conventional example described above, the living space is not reduced, and the building volume can be used efficiently. In addition, maintenance management such as the conventional vibration damping device is unnecessary,
This is also economical.

Further, in the above embodiment, an example in which the wind W from the lower direction is assumed in FIG. 2 is shown, but the second vortex generator is applied to the wind from the right direction in FIG.
3b works, the third vortex generator-3c works for the wind from above, the fourth vortex generator-3d works for the wind from the left, and so on. Can deal with wind from the direction.

The width, length and projecting dimension of the vortex generator-3 are not limited to those in the above embodiment, but can be set as appropriate according to design conditions, which departs from the scope of the present invention. It goes without saying that various modifications are possible within the range not covered.

[0014]

The present invention is configured as described above,
The following effects can be achieved. (1) Since the action of the vortex generator can prevent the generation or growth of vortices generated by the building itself, it is possible to reduce or prevent vibration of a building with a large span roof due to vortices. (2) Since the space that can be used as a living space does not decrease, it is possible to increase the spatial utilization. (3) Maintenance is unnecessary and economical. (4) The wind from all directions can be dealt with.

[Brief description of drawings]

FIG. 1 is an elevation view of a building with a large span roof according to an embodiment of the present invention.

FIG. 2 is a plan view of a building with a large span roof according to an embodiment of the present invention.

[Explanation of symbols]

 1 Building with a large span roof 2 Roof 2a Roof outer edge 3 Vortex generator 4 Connecting tool W Wind H Building height

Claims (2)

[Claims] 1. A building having a large span roof, in which a rod-shaped vortex generator is arranged along the outer peripheral edge of the roof of the building so as to protrude from the outer peripheral edge by a predetermined distance. Aerodynamic damping structure in a building with a large span roof. 2. The vortex generator has a rod shape with a square cross section, and the width of one side is 1/10 of the height of the building, and the vortex generator is arranged so as to project at an interval of 1/5 of the height of the building. An aerodynamic damping structure for a building with a large span roof according to claim 1.