JP2878550B2 - Construction method of dome roof building - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dome roof structure such as a multipurpose arena in which a large indoor space is formed by a dome roof, and more particularly to a dome roof structure mainly composed of a steel truss structure.

[0002]

2. Description of the Related Art A conventional dome roof building generally comprises a dome roof in which a bowl is turned down by a steel truss structure. As the construction method, as disclosed in Japanese Patent Publication No. 58-56778,
While constructing a donut-shaped lower structure mainly composed of steel reinforced concrete structures, assembling a dome roof of a steel truss on the ground in the space surrounded by this lower structure, The dome roof is lifted up, and the outermost peripheral portion of the dome roof is fixed to the upper inner peripheral portion of the lower structure.

[0003]

In a conventional dome roof employing a steel truss structure, the slope of the roof has a dome curved surface that becomes steeper toward the outer periphery. Therefore, when the dome roof assembled on the ground is lifted up as described above, the following construction problems occur.

[0004] In the lift-up process, the entire dome roof is lifted with the outer peripheral edge of the dome roof as a supporting point. At this time, a horizontal force spreading in the radial direction acts on the dome peripheral edge. It is difficult to obtain the reaction force that catches the horizontal force. Therefore, if no countermeasures are taken on the side of the dome roof, when the dome is lifted up, the periphery of the dome opens outward and the dome is deformed.

Therefore, as disclosed in Japanese Patent Publication No. 58-56778, prior to the lift-up step, the periphery of the dome roof on the ground is diametrically connected by a horizontal connecting member, and this horizontal connecting member is connected to the dome roof by a horizontal connecting member. The dome is prevented from deforming by receiving the horizontal force during lift-up.

[0006] However, in the above-mentioned conventional construction method, there are a temporary construction work in which the rim roof is diametrically connected between the peripheral edges thereof by a horizontal connecting member, and a dismantling work for removing the horizontal connecting member after the dome roof is lifted up and fixed. You need extra
There was a problem that the construction was complicated and time-consuming. Also,
The disassembled horizontal connecting member is a member that is difficult to be diverted to other uses, and leads to a problem of increasing material costs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a building employing a dome roof mainly composed of a steel truss structure, in which the inclination of the outermost periphery of the dome roof is different from that of the other. The structure is to be looser than the part, so that the dome roof assembled on the ground can be lifted up without adding a special reinforcing member.

[0008]

Therefore, according to the present invention, there is provided a step of constructing a donut-shaped lower structure mainly composed of a steel-framed reinforced concrete structure, and the lower ends of a large number of pillars are attached to the upper end of the inner periphery of the lower structure. Connecting the connecting portions of the pillars and the lower structure with each other by a tension ring in a circumferential direction, and arranging the pillars diagonally upward to form a dome leg. On the ground above the portion surrounded by the lower structure, a dome curved surface having a larger inclination on the outer peripheral side than the center portion and a larger inclination on the outer peripheral side than the inclination of the dome leg portion, and a compression ring on the outermost peripheral portion. Assembling the dome body of the steel truss structure with the addition of, and temporarily providing a plurality of columns around the dome body, and lifting up the dome body along these columns. Connecting the compression ring portion to the upper end of each of the pillars of the dome leg to allow the dome body to be supported by the lower structure via the dome leg. I tried to construct it.

[0009]

The slope of the dome curved surface of the dome roof is larger on the outer peripheral side than at the center. Further, a compression ring is added to the outermost peripheral portion of the dome roof. Therefore, when the entire dome is lifted with the outer periphery of the dome roof assembled on the ground as a fulcrum, the horizontal force itself acting to spread the dome outer periphery to the outside is very small, and the horizontal force is reduced by the compression ring. Is surely received. as a result,
There is no need to add a temporary reinforcing member for lifting up the dome roof.

After the construction, the load of the dome roof is applied to the lower structure via each pillar of the dome leg. The horizontal component of the load (applied in the direction of increasing the diameter) is suppressed by the tension ring.

[0011]

1 and 2 show the structure of a dome roof building according to an embodiment of the present invention after construction. First, the structure and features of the dome roof building in a completed state according to both figures will be described. explain. The dome roof of this embodiment has a diameter of 16
5m, rise 43m steel frame dome, diameter 134
m dome body 1 and dome leg 2 on the outer periphery
And a diameter of 45 m combined with the top of the dome body 1
Of the dome 3 consisting of the three system trusses. The ground-side lower structure supporting the dome roof composed of these three parts is a donut-shaped stand structure 4 mainly composed of a steel-framed reinforced concrete structure with a multi-layered seat 5 provided on the inner peripheral side. .

The dome main body 1 has a steel truss structure using a section steel such as a roll H section steel or a CT section steel, and forms a compressive stress field in both the radial direction and the circumferential direction. A compression ring 1a is added to the innermost peripheral portion of the dome body 1, and a compression ring 1b is also added to the outermost peripheral portion. Each of the compression rings 1a and 1b is an annular member for processing a horizontal component of the internal force of the dome curved surface, and a compressive stress is generated in a cross section of the member. The dome top 3 is made of a lightweight system truss centered on a quadrangular pyramid unit composed of a steel pipe and a node, and is connected to the innermost compression ring 1 a of the dome body 1 by fitting its outermost periphery to the compression ring 1 a. The dome top 3 is provided with a perforated outer panel, a glass skylight, and a louver to allow natural ventilation and natural daylighting.

The dome main body 1 and the dome top 3 form a continuous dome curved surface, and the slope of the dome curved surface becomes larger toward the outer peripheral side.

The stand structure 4 employs a twin column structure in which two columns 6a and 6b combined in a substantially X-shape are employed, and the main structure is a steel reinforced concrete structure. A large number of twin columns 6a, 6b are constructed on the circumference at regular intervals, and the large number of twin columns 6a, 6b are integrally connected by floor slabs 6c and beams 6d. An SRC load-bearing wall 6e with a built-in steel plate is provided in the most constricted portion in the middle of the twin columns 6a and 6b, so that sufficient strength and deformability are provided. In addition, the seat 5 adopts a precast plate, and the floor taken out has a structure in which a synthetic floor plate is arranged on a steel frame to reduce the weight of the building and shorten the construction period.

On the dome leg, two steel members are substantially Y-shaped.
It is composed of a large number of pillars 7 combined in a letter shape and integrated. The pillars 7 are arranged radially at a constant pitch, facing obliquely upward toward the center of the dome, and the lower end of the pillar 7 is connected to the inner peripheral upper end of the stand structure 4. The dome body 1 is connected to the outermost compression ring 1b. The connecting portions between the pillars 7 and the stand structure 4 are mutually connected in the circumferential direction by a tension ring 8. The connection point between the pillar 7 and the compression ring 1b and the connection point between the pillar 7 and the tension ring 8 are respectively pin-coupled, and are rotatable around a horizontal pin.

As shown in FIG. 1, the inclination angle of each pillar 7 of the dome leg 2 from the center of the dome is smaller than the inclination of the outermost dome curved surface of the dome main body 1. The dome roof has a gentle skirt. Therefore, the weight of the dome roof is
Is transmitted evenly to the lower stand structure 4 via.
Since the connecting points of the pillars 7 in the stand structure are circumferentially connected by the tension ring 8, the horizontal force (acting in the direction of expanding the diameter) transmitted from the dome leg 2 to the stand structure 4 is tensioned. It is effectively received by the ring 8. That is, the horizontal force from the dome roof is suppressed by the hoop tension effect of the tension ring 8, so that the stand structure 5 does not need to bear a large horizontal force acting from the dome roof.

FIG. 3 shows the main points of the construction method of the dome roof building having the above configuration. The construction method of the present invention will be described with reference to FIG.

First, a donut-shaped stand structure 4 is constructed, and temporary columns 10 are installed at an appropriate pitch along the inner periphery thereof. Next, the base end of each pillar 7 of the dome leg 2 is connected to the inner periphery of the upper end of the stand structure 4, and the other end of the pillar 7 is held in a predetermined inclined state using the pillar 10 or the like. Then, the dome legs 2 are sequentially constructed.

In parallel with or after the construction of the stand structure 4 and the dome leg 2, the dome body 1 and the dome top 3 are assembled on the ground in the space surrounded by the stand structure 4. In this case, as shown in FIG. 3, a temporary mount 11 having an appropriate height is appropriately arranged on the ground, and the temporary mount 11
The dome body 1 having the steel truss structure is assembled using the dome body 1 and the dome top 3 is combined with the dome body 1.

When the assembly of the dome main body 1 and the dome top 3 is basically completed, a lift mechanism is mounted on a number of pillars 10 located on the outer periphery of the dome main body 1 and the lifting wires 12 And the lower end of the suspension wire 12 is connected to the outer peripheral edge of the dome body 1. Then, the suspension wires 12 are wound up in synchronization, and the whole is lifted up while the dome body 1 (including the dome top 3) is kept horizontal. When the dome main body 1 is lifted up to a predetermined height, the compression ring 1 b on the outer peripheral edge of the dome main body 1 is connected to each of the pillars 7 of the dome leg 2.
Are combined with each other by combining with the tip portion of. Thus, the dome main body 1 is supported by the stand structure 4 via the dome leg 2.

[0021]

As described in detail above, according to the present invention, the dome roof is divided into a dome main body (including the dome top in the embodiment) and a dome leg combined with the outer periphery thereof, and the ground side is provided. By connecting the lower end of each pillar of the dome leg to the upper end of the inner circumference of the lower structure, the entire dome roof is supported by the lower structure. Here, a compression ring is provided on the outermost periphery of the dome body, and each pillar of the dome leg is connected to the compression ring. The connecting portions between the pillars and the lower structure are circumferentially connected by tension rings. The dome body has a dome curved surface having a greater inclination on the outer peripheral side than the center portion, and the inclination of the dome leg is set to be smaller than the inclination of the dome curved surface on the outer peripheral side of the dome body. In this way, the horizontal force transmitted from the dome roof to the lower structure is suppressed by the tension ring, and the lower structure does not need to withstand much horizontal load.

By adopting the above configuration, when the dome main body assembled on the ground is lifted up with its outer peripheral edge as a supporting point, the horizontal force itself acting to spread the outer periphery of the dome outward is very small. In addition, since the horizontal force is reliably received by the compression ring, there is no possibility that the dome body is deformed. Therefore, it is not necessary to add a temporary reinforcing member to the dome body for lifting up, and the construction work of this kind of dome roof can be made much more efficient than before.

Also, since the dome legs are moderately sloped to form a dome curved surface with a gentle foot, the ceiling height near the outer periphery of the dome does not become unnecessarily high, and no wasteful space is generated. The system load is reduced. Furthermore, since the inner surface of the dome ceiling spreads in a horn shape, the reflected energy of the inner surface of the ceiling focuses near the center of the floor surface as in the conventional bowl shape, and the problem that the reverberation time and reverberation energy increase can be solved. .

[Brief description of the drawings]

FIG. 1 is a sectional view showing a schematic configuration of a dome roof building according to an embodiment of the present invention.

FIG. 2 is a plan view of a dome roof portion in the embodiment.

FIG. 3 is a schematic view showing a main point of the construction work of the dome roof of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dome main body 2 Dome leg 3 Dome top 4 Stand structure (lower structure) 5 Seat 6a, 6b Twin column 7 Pillar 8 Tension ring 10 Temporary support 11 Temporary gantry 12 Suspension wire

──────────────────────────────────────────────────続 き Continued on the front page (72) Noriaki Matsuura, Inventor No. 4-33, Kitahama Higashi, Chuo-ku, Osaka-shi, Osaka Inside Obayashi Corporation Head Office (58) Field surveyed (Int.Cl. ⁶ , DB name) E04B 1 / 32 102 E04G 21/14

Claims (1)

(57) [Claims] 1. A step of constructing a donut-shaped lower structure mainly composed of a steel-framed reinforced concrete structure; and connecting lower ends of a plurality of pillars to an inner peripheral upper end of the lower structure. The connection part with the lower structure is mutually connected in the circumferential direction by a tension ring,
A step of radially arranging the pillars obliquely upward to form a dome leg, and, on the ground of a portion surrounded by the lower structure, a slope on the outer peripheral side larger than the center portion, and A step of assembling a dome body part of a steel truss structure in which the inclination is a dome curved surface larger than the inclination of the dome leg part, and a compression ring is added to the outermost peripheral part; a plurality of columns are temporarily provided around the dome body part, By lifting up the dome body along these columns and connecting the compression ring portion to the upper end of each of the dome legs, the dome body is connected to the dome via the dome legs. A method of constructing a dome roof building, comprising the step of supporting the building with a lower structure.