JP2741819B2 - Dome roof frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame of a dome roof constructed in an elliptical rotation curved surface shape in which an ellipsoidal rotator (rugby ball-shaped ellipsoid) is halved.

[0002]

2. Description of the Related Art In recent years, dome roofs having a large span structure have been actively constructed, and many of them have a rectangular parallelepiped shape or a hemispherical shape in which a sphere is halved.

However, recently, it has been desired to construct a dome roof in an elliptical rotation curved surface shape obtained by rotating an ellipse about its major axis as an axis and halving an ellipsoidal rotator (rugby ball-shaped ellipsoid). Strong social demands.

Heretofore, a dome roof frame of this type conventionally draws an ellipse by a generally known geometric drawing method, draws an elliptical rotation surface from the ellipse, and attaches a beam member along the ellipse rotation surface. It is constructed by erection.

[0005] For example, FIG. 7 shows one of them.
Draw a concentric circle with the major axis ab and the minor axis cd as diameters, divide the circumference of this concentric circle by radiation, and divide the circumference of this concentric circle with the radiation (equivalent to 24 in this figure), e, e
^{,, F, f,, g} , g,, h, h,, i, i,, ... than the major axis a
b, a curve passing through intersections j, k, l, m, n,... and a, c, b, d of the short axis cd and the parallel lines drawn in parallel, respectively, is drawn as an ellipse, and the ellipse is called a long axis. An elliptical rotation surface is drawn by rotating about ab, and a beam member is provided along the elliptical rotation surface.

[0006]

However, in such a frame of a dome roof, it is necessary to connect several arcs one by one to draw a continuous elliptic curve, and the center of each arc is Since it is necessary to find the center of each arc one by one instead of one, the configuration of the ellipse was extremely troublesome, and furthermore, it was not easy to construct a frame on an elliptic curve. .

In addition, the beam member 5, which is continuously constructed in an elliptical shape and forms a frame, is twisted, and the beam member cannot be formed into a regular mesh (see FIGS. 8, 9, and 10).

Further, since the installation interval of the frame assembled on the arc differs depending on the location, the beam member constituting this frame is used.
The lengths of the beam members 6 formed in a mesh between 5 and 5 are different from each other, and therefore, in addition to the production management and transportation management of the beam members, the member management in the erection work is extremely troublesome.

The present invention has been proposed to solve the above-mentioned conventional problems, and uses the same type of beam members (mainly those having the same length) as much as possible, and
An object of the present invention is to provide a frame of a dome roof in which a beam member is laid in a regular mesh shape to easily configure a dome roof having a substantially elliptical curved surface.

[0010]

A dome roof frame according to the present invention comprises a dome roof having a slender elliptical curved surface shape elongated in a spar direction, a wedge side portion located at both ends in the spar direction, and both sides in the spar direction. To the side of the girder located in the part, the beam direction, which is installed along the girder direction, and the girder direction, respectively, is bridged in a concentric arc shape, and the beam member in the whet direction and the beam member in the girder direction Are joined so that they are continuous with each other,
Further, a beam member installed between the beam members so as to intersect with the end direction and the girder direction has a gradient of the same curvature and is bridged in a mesh shape.

[0011]

1 is a plan view schematically showing an embodiment of a dome roof bone according to the present invention. FIG. 2 is a vertical sectional view taken along the line II of FIG. 2, and FIG. 4, FIG. 4 is a plan view showing details of the frame of the dome roof, FIG. 5 is a vertical sectional view of the line, and FIG. 6 is a vertical sectional view of the line.

In the figure, the dome roof includes a ridge portion A located at the upper end of the dome roof, a wedge side portion C located at both ends in the girder direction of the dome roof, and a girder side portion located on both sides in the girder direction. B is formed in an elliptical rotation curved shape that is elongated in the direction of the spar.

The wife side portion C is constructed in a planar arc shape with a radius R _{A about} the point O ₁ , and the girder side portion B is formed in an arc shape with a radius R _{B about} the point O ₂ , The dome roof is formed in a pseudo-elliptical shape from the girder side B and the wife side C (see FIG. 1).

The roof surface of the wife side portion C is formed into a curved surface with a radius _RC centered on the point O ₃ (see FIG. 2), and the roof surface of the girder side portion B is the roof surface of the wife side portion C. Radius R so that
It is configured in a curved shape of _C (see FIG. 3). Therefore, the girder side portion B and the end side portion C are configured to have the same gradient of curvature.

The point O ₃ is on a vertical line M passing through the point O ₁ . Further, the center O ₄ of the radius R _C of the roof of the wife side C is on a vertical line K through the vertical line N (see FIGS. 2 and 3).

The beam member 1 installed on the beam side B along the beam direction and the beam member 2 installed on the beam side C along the beam direction are each bridged in a concentric circular arc on a plane. In addition, the beam members 1 and 2 having the same height are joined in a state where they are substantially continuous in an elliptical shape. Further, between the adjacent beam members 1 and 1 and between the beam members 2 and 2, a beam member 3 is bridged so as to form a regular mesh, and the beam members 3 and 1 and the beam members 2 and 2 are joined together. The beam member 3 of the beam side portion B and the beam member 3 of the beam side portion C are both bridged with the same gradient of curvature (in FIGS. 2 and 3, the beam side portion B and the beam side portion). The radius RC of the roof surface of _C is the same). The beam member 4 is stretched over the ridge A so as to form a mesh.

Each of the beam members 1, 2, 3 and 4 uses a truss beam made of a steel pipe or an L-shaped steel.

The dome roof frame design method and frame assembly procedure according to the present invention will be described below.

First, the length L of the dome roof in the girder direction and the length W of the dome roof in the end direction are determined based on the scale of the dome roof to be constructed (see FIG. 1).

Next, a point O on the long axis S
_A beam member 2 for forming an arc having a radius _RA around ₁ is arranged. Moreover, successive beam members 1 and 1 to make an arc having a radius R _B whose center point O ₂ on the vertical line N passing through the center of the long axis S to the digit side B on the circular arc R _A and the curved surface To form a pseudo-elliptical shape.

[0021] Next, a roof surface of the left and right wife side C except the ridge portion A of the dome roof curved radius R _c passing through the points O ₃ on the vertical line M passing through the point O ₁ ( (See FIG. 2).

Further, to form the roof of the digit side B into a curved shape having a radius R _c so as to be continuous with the roof of the wife side C (see FIG. 3).

Next, the plurality of beam members 1 and 2 are bridged in a concentric arc shape on the left and right side portions C and the girder side portions B.
At the same time, a plurality of beam members 3 are bridged between the beam members 1 and 1 and between the beam members 1 and 2 so as to form a regular mesh while being joined to the beam members 1 and 2 (see FIG. 1).

Next, the beam members 4 of the ridge part A are bridged so as to form a mesh while being joined to each other. In addition, the beam members 4 of the ridge part A are bridged after the beam members 1, 2, and 3 of the peripheral portion, thereby adjusting the mesh of the peripheral beam members 1, 2, and 3.

[0025]

Since the present invention is configured as described above, it has the following effects.

A wife side portion located at both ends in the beam direction,
Since the beam members installed along the girder direction and the girder direction on the girder side portions located on both sides in the girder direction are each bridged in a concentric arc shape, the spacing between the beam members is set to the wedge side portion. Since all the beam members can be made the same, and the lengths of the beam members bridged between the beam members can be made the same, the processing and transportation of the beam members can be performed extremely. The beam member can be easily formed, and there is an effect that a regular mesh-shaped frame can be easily formed without twisting the beam member.

Further, by unifying the lengths of the beam members, there is an effect that the beam members can be easily bridged and managed.

Further, first, the beam members on the wife side and the girder side of the peripheral part excluding the ridge portion are bridged, and then, the beam members of the ridge portion are bridged, so that the mesh of the skeleton is formed at the ridge portion. Irregularities can be easily adjusted.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing an embodiment of a dome roof frame having a substantially elliptical curved surface according to the present invention.

FIG. 2 is a vertical sectional view taken along the line II of the dome roof in FIG.

FIG. 3 is a vertical sectional view of a dome roof in FIG.

FIG. 4 is a plan view showing details of a skeleton of the dome roof shown in FIG. 1;

FIG. 5 is a vertical sectional view of the dome roof shown in FIG.

6 is a vertical cross-sectional view of the dome roof shown in FIG.

FIG. 7 is an explanatory diagram showing an example of an ellipse drawing method.

FIG. 8 is a plan view schematically showing an embodiment of a conventional dome roof skeleton having an elliptical rotation curved surface shape.

FIG. 9 is a partial vertical sectional view taken along the line II of the dome roof in FIG. 8;

FIG. 10 is a vertical sectional view of a dome roof in FIG.

FIG. 11 is a vertical sectional view similar to FIG. 2 showing another embodiment in which a point O ₃ on the vertical line M is determined to be O ₁ .

FIG. 12 is a roll-line vertical sectional view similar to FIG. 2 obtained in the same manner as in FIG. 11;

[Explanation of symbols]

A: ridge part, B: girder side part, C: wife side part, 1, 2, 3, 4 ... beam member, 5 ... beam member, 6 ... beam member.

Claims (1)

(57) [Claims] 1. A frame of a dome roof having an elliptical rotating curved surface shape elongated in the spar direction, a skirt portion located at both ends in the spar direction of the dome roof, and a spar side portion located on both sides in the spar direction. At the same time, the beam members installed along the tang direction and the girder direction are respectively bridged in a concentric circular arc shape, and the beam member in the tang direction and the beam member in the girder direction are joined so as to be continuous with each other. And a dome roof, wherein the beam members are installed between the beam members in such a manner that the beam members are installed so as to intersect the beam direction and the girder direction in a mesh shape with the same gradient of curvature. Skeleton.