KR200329338Y1 - Device of reducing wind pressure on tent roof and tent roof provided therewith - Google Patents

Abstract

The present invention is intended to prevent damage to the roof membrane in the membrane roof made of a roof membrane installed on the truss or the mast thereon. The wind pressure reduction device of the present invention is provided on the wind-up side of the membrane subjected to high wind pressure, and is composed of a member such as an elongated plate having a plurality of holes. In such a wind pressure reduction device, the shielding rate is preferably 50% to 60%, and the shape, size, arrangement, etc. of the holes are preferably irregular and regular ones may be used. In this way, since the flow path of the wind passing near the position where the wind pressure is to be reduced is changed and the wind speed is reduced, the wind pressure applied to the roof membrane is reduced, thereby preventing damage to the roof membrane.

Description

Wind pressure reduction device of membrane roof and membrane roof having same {DEVICE OF REDUCING WIND PRESSURE ON TENT ROOF AND TENT ROOF PROVIDED THEREWITH}

The present invention relates to a wind pressure reduction device of the roof, and more particularly to a device for reducing the wind pressure applied to the roof in the form of a membrane.

Membrane roof structure is often used in large stadiums and large exhibition halls because it is light in harmony with the surrounding landscape.

Particularly, the roof structure made of membrane is very lightweight and has the advantage of forming a secondary structure by itself and the beautiful semi-transparent material. It is widely used in large space roof structures such as.

However, if the membrane roof is blown by a momentary gust, the roof membrane may be torn and damaged a lot. Especially in the case of the membrane roof structure used in a large stadium, it takes a lot of time and money to recover the damaged roof. There is a problem.

Therefore, it is necessary to develop a membrane roof structure that can withstand gusts by reinforcing the windbreak structure unique to the tent.

The technical problem to be achieved by the present invention is to solve such a problem, so that even if an unexpected gust blows, the roof membrane can withstand without damage.

Another object of the present invention is to provide a wind pressure reduction device that can be constructed at a simple and low cost.

1A and 1B are schematic perspective and front views of a wind pressure reduction device of a membrane roof and a stadium in which the wind pressure reduction device is installed according to an embodiment of the present invention.

2A and 2B are schematic side and side cross-sectional views of a wind pressure reduction device of a membrane roof and a membrane roof in which the wind pressure reduction device is installed according to an embodiment of the present invention.

3a and 3b is a perspective view and a side cross-sectional view of the wind pressure reduction device of the membrane roof according to an embodiment of the present invention.

Figure 4 is a perspective view of the wind pressure reduction device of the membrane roof according to another embodiment of the present invention.

5 is a perspective view of the wind pressure reduction device of the membrane roof according to another embodiment of the present invention.

6a and 6b are a perspective view and a side view of the wind pressure reduction device of the membrane roof according to another embodiment of the present invention.

7a and 7b is a perspective view and a side view of the wind pressure reduction device of the membrane roof according to another embodiment of the present invention.

8 is a perspective view of the wind pressure reduction device of the membrane roof according to another embodiment of the present invention.

9A and 9B are graphs showing relative magnitudes of wind pressure in a membrane roof having a conventional membrane roof and a wind pressure reducing device according to an embodiment of the present invention, respectively.

10 is a graph showing the wind speed at each position when the wind pressure reduction device according to an embodiment of the present invention is applied.

Wind pressure reduction device of the present invention for achieving this problem is a wind pressure reduction device of the membrane roof made of a roof film installed on the truss or mast, is installed on the front of the membrane roof and includes a shield and an opening.

At this time, the area ratio of the shielding portion to the opening is preferably 100% to 150%.

The shield according to an embodiment of the present invention includes a plate-shaped member, wherein the opening is a plurality of holes provided in the plate-shaped member. At least one of the shape, size and arrangement of the holes is preferably irregular.

According to another embodiment of the present invention, the shield includes a plurality of pillars and a plurality of plate members fixed horizontally between the pillars, wherein the opening is made of a space between the plate members. The cross section of the plate member may be arc or wedge shaped.

According to another embodiment of the present invention, the shield includes a plurality of pinwheels and the openings are spaces between the pinwheels. Pinwheel can be used for wind power generation.

The membrane roof of the present invention for achieving this problem is a truss, a plurality of masts installed on the truss, a roof membrane installed to be fixed on the truss and the mast, and the wind pressure is installed on the front of the membrane roof and includes a shield and an opening A reduction device.

The shielding rate of the wind pressure reduction device is preferably 50% to 60%.

According to one embodiment of the present invention, the wind pressure reduction device includes a plate-shaped member having a plurality of holes, wherein at least one of the shape, size and arrangement of the holes is irregular.

According to another embodiment of the present invention, the wind pressure reduction device includes a plurality of pillars and a plurality of plate members fixed horizontally between the pillars, and the cross section of the plate member may be arc or wedge shaped.

According to another embodiment of the present invention, the wind pressure reduction device includes a plurality of pinwheels, which may be used for wind power generation.

With reference to the accompanying drawings will be described in detail to be easily carried out by those of ordinary skill in the art with respect to the embodiment of the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

Now, a wind pressure reduction device of a roof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1A and 1B are schematic perspective and front views of a wind pressure reduction device of a roof according to an embodiment of the present invention and a stadium in which the wind pressure reduction device is installed, and FIGS. 2A and 2B are side and side cross-sectional views thereof.

As shown in Figure 1a to 2b, the wind pressure reduction device 20 according to an embodiment of the present invention is installed long in the front of the membrane roof (10). As shown in FIG. 2B, the membrane roof 10 includes a truss 11, a plurality of masts 12 disposed thereon, and a roof membrane 13 covering the truss 11. The roof film 13 is firmly fixed to the mast 12 or the truss 11.

Wind pressure reduction device 20 of the present embodiment is installed on the upper portion of the truss 11, as shown in Figures 1b and 2b, but may be lowered to the lower portion of the truss (11).

3A and 3B are a perspective view and a side cross-sectional view of a wind pressure reduction device of a roof according to an embodiment of the present invention.

As shown in FIGS. 3A and 3B, the roof pressure reduction apparatus according to an embodiment of the present invention is a plate member 30 having a plurality of rectangular holes 32 arranged regularly. Metal, plastic, wood, cloth, etc. may be used as the material of the plate member 30, and the height of the plate member 30 may be appropriately adjusted according to the height. The shielding rate, i.e. the area of the blocked portion over the entire area of the member 30, ie the area of the portion excluding the hole 32 for the total area, is preferably about 50-60%. In other words, the area of the blocked portion with respect to the area of the hole 32 is about 100% to 150%.

The wind pressure reduction device 20 according to the present embodiment reduces the absolute pressure applied to the roof membrane 13 by wind to prevent the roof membrane 13 from being damaged. This will be described in detail with reference to the above drawings.

As shown in FIGS. 1B and 2B, when a strong wind blows from the front of the wind pressure reduction device 20, the pressure caused by the airflow flowing along the upper portion of the roof membrane 13 is much higher than the pressure caused by the airflow flowing downward. Because of the size, the roof membrane 13 is given upward force. If the wind pressure reduction device 20 of the present embodiment is not present, the roof membrane 13 may receive the force of the wind as it is and may be separated from the truss 11.

In the present embodiment, the wind pressure reduction device 20 first reaches before the wind reaches the roof membrane 13. As shown in FIG. 2B, some of the airflow reaching the wind pressure reduction device 20 flows up and down the wind pressure reduction device 20, and another portion flows through the wind pressure reduction device 20. That is, in FIG. 3A and FIG. 3B, the airflow that strikes the plate member 30 transmits some energy to the plate member 30 and is dispersed in each direction as the speed decreases. Dispersed airflow flows through the face of the plate member 30, some of which meet the holes 32, pass through the holes 32, and others pass up and down the plate member 30. In the vicinity of the hole 32, the airflow flowing through the surface of the plate-shaped member 30 toward the hole 32 and the airflow passing directly through the hole 32 meet and collide, as well as vortex due to the edge of the hole 32. As a result, the speed of the wind flowing through the hole 32 through the upper or lower portion of the roof membrane 13 is greatly reduced, and the flow path is changed so that the absolute pressure applied to the roof membrane 13 is also greatly increased. Decreases.

In addition, some of the airflow that has passed over the plate-shaped member 30 comes down again and collides with the airflow passing through the hole 32 and flows through the upper portion of the roof membrane 13, but the rest of the airflow rises higher upwards. Has little effect on). Similarly, the airflow that hits the plate-like member 30 and then passes below is combined with the airflow passing under the plate-like member 30 and flows along the bottom of the roof membrane 13.

Of course, even if only the plate-shaped member 30 without the hole 32 is used, the pressure applied to the roof membrane 13 can be reduced, but the pressure reduction effect is less than that of the case having the hole 32 as in the present embodiment. Rather, since the pressure applied to the plate member 30 itself increases, a considerable effort is required to fix the plate member 30, and thus the effectiveness thereof is less than that of the embodiment of the present invention.

Although the example illustrated in FIGS. 3A and 3B has been described so far, embodiments of the present invention are very diverse and will be described from now on.

Figure 4 is a perspective view of the wind pressure reduction device of the roof according to another embodiment of the present invention.

As shown in FIG. 4, unlike the example of FIGS. 3A and 3B, in the wind pressure reduction device according to the present embodiment, holes 42 having various shapes and sizes are irregularly arranged in the plate member 40. That is, the shape of the hole 42 is very diverse, such as a square, a circle, a triangle, a hexagon, etc., the size is also various, such as large, small, medium size. In addition, the holes 42 are not only regularly arranged but also arbitrarily arranged without a specific specification. In addition to the shape of the hole 42 shown in FIG. 4, any other shape of hole may be used.

In the case of the embodiment shown in Figure 4 has an effect of further reducing the wind speed of the wind passing through the hole 42 compared to the embodiment of Figures 3a, 3b. That is, due to the irregular shape, size, and arrangement of the holes 42, vortices occurring near the holes 42 are also irregular, which further reduces the kinetic energy of the airflow, thereby reducing the speed of the wind. As a result, the pressure applied to the roof membrane 13 is further reduced.

5 is a perspective view of a wind pressure reduction device of a roof according to another embodiment of the present invention.

The wind pressure reduction device of the roof according to the present embodiment illustrated in FIG. 5 includes a plurality of horizontal and vertical members 50 orthogonal to each other. The transverse and longitudinal members 50 are woven in the form of nets and the spaces 52 surrounded by them serve as holes 32 and 42 in FIGS. 3A, 3B and 4.

6a and 6b are a perspective view and a side view of a wind pressure reduction device of a roof according to another embodiment of the present invention.

6A and 6B, the wind pressure reduction device of the roof according to the present embodiment includes a plurality of pillars 60 arranged in a row and a plurality of horizontal members 61 arranged horizontally therebetween. . The cross section of the pillar 60 may be various shapes such as circles, squares, triangles, hexagons. The horizontal member 61 is an elongate plate shape, and several pieces are provided side by side in the vertical direction so that the center of the short side of the horizontal member 61 may be fixed to a pillar between two adjacent pillars 60. Between the horizontal members 61, a space 62 of a suitable size through which air flow can pass is secured. 6A and 6B, the wide surface of the horizontal member 61 is parallel to the floor, but may be disposed to be inclined with the floor, and an adjustment mechanism (not shown) for adjusting the angle may be provided.

This embodiment also has the same effect as the previous embodiments, the maximum wind pressure reduction effect can be seen by appropriately adjusting the angle formed by the wide surface and the floor.

7A and 7B are a perspective view and a side view of a wind pressure reduction device of a roof according to another embodiment of the present invention.

In the wind pressure reduction device shown in FIGS. 7A and 7B, the shapes of the plurality of horizontal members 71 provided horizontally between the plurality of pillars 70 are different from those of FIGS. 6A and 6B. That is, the horizontal member 71 is made by bending the plate so that its cross section is semi-circular or arc-shaped. The cross section of the horizontal member 71 may have a wedge shape or another shape.

8 is a perspective view of a wind pressure reduction device of a roof according to another embodiment of the present invention.

As shown in FIG. 8, the wind pressure reduction device according to the present embodiment includes a support 80 arranged to be long and a plurality of pinwheels 81 provided on the support 80. Pinwheel 81 By appropriately adjusting the shape, direction, position, number of blades, and the like of the pinwheel 81, the speed of the wind can be reduced as desired. In addition, by using the pinwheel 81 for wind power generation can also cover the power required for buildings or stadiums.

9A and 9B are graphs showing relative magnitudes of wind pressures measured on a membrane roof having a conventional membrane roof and a wind pressure reducing device according to an embodiment of the present invention, respectively.

In FIG. 9A and FIG. 9B, the horizontal axis represents a measurement position, where the measurement position 1 is a point 1/4 of the height of the wind pressure reduction device from the wind pressure reduction device, and the interval between the measurement positions 1-12 is the 1/2. The wind pressure reduction device used in this experiment has the structure shown in FIG. 5, the shielding rate is 80%, and the wind direction is from left to right.

In FIG. 9A and FIG. 9B, when the pressure is negative, the wind pressure acts in the direction of lifting the roof membrane 13, and as shown in FIG. 9A, the negative pressure is very strong in the measurement position 1. There is a risk that the roof film 13 may fall off or be damaged. However, as shown in FIG. 9B, in the case of the wind pressure reduction device according to the present embodiment, the pressure at the measurement position 1 is reduced by almost half. Therefore, it can be seen that this embodiment is very effective.

10 is a graph illustrating various shielding ratios of relative wind speeds at respective positions when the wind pressure reduction device according to an embodiment of the present invention is applied.

In Figure 10, the horizontal axis represents the distance from the wind pressure reducing device, the vertical axis represents the height, the relative wind speed means a relative value with respect to the wind speed when there is no wind pressure reducing device. The wind pressure reducing device used in this experiment has the structure shown in FIG. 5 and the wind direction is from left to right.

As can be seen in Figure 10, if there is a wind pressure reduction device it can be seen that the overall wind speed is reduced regardless of the shielding rate. However, if the shielding rate is 100%, that is, completely blocked without a hole, if the wind pressure reduction device is over a certain height, the wind speed is larger than without the wind pressure reduction device, so the adverse effect remains. In addition, when the shielding rate is 25%, it can be seen that there is almost no wind speed reduction effect. If the shielding rate is 60%, it can be seen that the wind speed reduction effect is almost 80% or more, and that the effect can be sufficiently seen from a long distance from the wind pressure reduction device.

Although the preferred embodiment of the present invention has been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

In particular, in addition to the structure shown in the drawings, the structure having a shielding portion and an opening can be regarded as any specific structure belongs to the scope of the present invention.

As described above, according to the embodiment of the present invention, a wind pressure reduction device having a simple structure having an opening is installed at a low price on the front of the roof membrane to reduce the speed of wind flowing through the roof membrane and reduce the pressure applied to the roof membrane to reduce the damage of the roof membrane. You can stop it.

Claims (16)

A wind pressure reduction device for membrane roofs consisting of roof membranes mounted on trusses or masts, The wind pressure reducing device is installed on the front of the membrane roof and comprises a shield and an opening. In claim 1, And an area ratio of the shielding portion to the opening portion is 100% to 150%. The method of claim 1 or 2, The shield includes a plate member and the opening is a plurality of holes provided in the plate member. In claim 3, At least one of the shape, size and arrangement of the holes is irregular wind pressure reduction device. The method of claim 1 or 2, And the shield includes a plurality of pillars and a plurality of plate members fixed horizontally between the pillars, and the opening portion comprises a space between the plate members. In claim 5, The cross section of the plate member is a wind pressure reduction device of the arc or wedge shape. The method of claim 1 or 2, The shield includes a plurality of pinwheels and the opening is a wind pressure reduction device is a space between the pinwheels. In claim 7, The pinwheel is a wind pressure reduction device for wind power generation. Truss, A plurality of masts provided on the truss, A roof membrane fixed to the truss and the mast, and Wind pressure reduction device is installed on the front of the membrane roof and includes a shield and an opening Membrane roof comprising a. In claim 9, The shielding rate of the wind pressure reducing device is 50% to 60% membrane roof. The method of claim 9 or 10, The wind pressure reduction device is a membrane roof comprising a plate-like member having a plurality of holes. In claim 11, At least one of the shape, size and arrangement of the holes is irregular membrane roof. The method of claim 9 or 10, The wind pressure reducing device includes a plurality of pillars and a membrane roof including a plurality of plate members fixed horizontally between the pillars. In claim 13, The cross section of the plate member is a wind pressure reduction device of the arc or wedge shape. The method of claim 9 or 10, The wind pressure reduction device is a wind pressure reduction device comprising a plurality of pinwheels. The method of claim 15, The pinwheel is a wind pressure reduction device for wind power generation.