JP2878545B2 - 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 When constructing a large dome roof building that can be used as a stadium for baseball, soccer, racby, etc. and that can accommodate a large audience, a conventional typical truss structure of a steel truss structure is as follows. There were some issues like.

[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, there is a problem that the construction is difficult. In addition, the dome curved shape has a problem that the acoustic characteristics in the dome are not good. In particular, the internal reflection of the dome roof focuses on almost the center of the floor surface in the dome, and large energy is reflected again from the floor surface toward the inner surface of the dome ceiling, causing a problem that the reverberation time and reverberation energy are extremely large. This is an acoustic characteristic that is completely unsuitable for using the dome roof facility as a venue for various events such as concerts, festivals or exhibitions. Further, the ceiling height of the outermost peripheral portion in the dome has also become considerably high, so that there is much wasted space that cannot be effectively used, and thus the load on the air conditioning system has also increased.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a building employing a dome roof mainly composed of a steel truss structure, wherein the inclination of the outermost peripheral portion of the dome roof is reduced. An object of the present invention is to provide a structure that is looser than other parts, and to solve construction problems, strength problems, and acoustic characteristics problems.

[0005]

A dome roof building according to the present invention has a donut-shaped lower structure mainly composed of a steel-framed reinforced concrete structure, and a lower end of a large number of pillars provided at an upper end of an inner periphery of the lower structure. A dome leg in which these pillars are radially arranged obliquely upward, a tension ring for circumferentially interconnecting a connecting portion between each of the pillars and the lower structure, and a steel truss. A dome body having a compression ring attached to an outermost peripheral portion of the dome body, the dome body being connected to an upper end of each of the pillars of the dome leg, and a dome on an outer peripheral side of the dome body. The inclination of the dome leg is set to be smaller than the inclination of the curved surface.

[0006]

The load on 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.

[0007]

1 and 2 show the construction of a dome roof building according to an embodiment of the present invention. The dome roof of this embodiment is a steel dome having a diameter of 165 m and a rise of about 43 m, and a dome main body 1 having a diameter of 134 m, a dome leg 2 on an outer peripheral portion thereof, and a diameter combined with a top of the dome main body 1. It consists of three parts of the dome top 3 consisting of a 45 m system truss. 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 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 generates a compressive stress 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 stand structure 4 has 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.

In 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.

Further, as shown in FIG. 1, the inclination angle of each pillar 7 of the dome leg 2 as viewed from the center of the dome is smaller than the inclination of the outermost dome curved surface of the dome 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.

The construction procedure of the dome roof building of the embodiment is basically as follows. First, a donut-shaped stand structure 4 is constructed. Each pillar 7 of the dome leg 2 is connected to the stand structure 4 and the upper end side is supported by a jack or the like. On the other hand, the dome main body 1 is constructed at the ground level on the inner periphery of the stand structure 4, and the dome top 3 is combined with the dome main body 1. Thereafter, the dome body 1 is lifted up, and the outermost periphery of the dome body 1 is
Are connected to each other by combining them at the upper end position of.

[0013]

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. Then, the inclination of the dome leg is set to be gentler 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. As described above, the strength is excellent, and the construction is facilitated by dividing the dome into the dome body and the dome leg.

[0014] Further, since the dome has a dome curved surface in which the inclination of the dome legs is moderated and the skirt is drawn smoothly, the ceiling height near the outer periphery in the dome does not become unnecessarily high, and no wasteful space is generated. The system load is reduced. In addition, since the inner surface of the dome ceiling spreads like a horn, the reflected energy on the inner surface of the ceiling focuses near the center of the floor as in a conventional bowl shape, eliminating the problem of increased reverberation time and reverberation energy. .

[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.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dome main body 2 Dome leg 3 Dome top 4 Stand structure (lower structure) 5 Seats 6a, 6b Twin columns 7 Pillar 8 Tension ring

────────────────────────────────────────────────── ─── Continuing on the front page (72) Kazuhara Kazuhara, Inventor Obayashi Gumi, 4-33 Kitahama Higashi, Chuo-ku, Osaka-shi, Osaka (58) Field surveyed (Int. Cl. ⁶ , DB name) E04B 1 / 32 102 E04B 7/08

Claims (1)

(57) [Claims] 1. A donut-shaped lower structure mainly composed of a steel-framed reinforced concrete structure, and a lower end of a plurality of pillars connected to an upper end of an inner periphery of the lower structure, and these pillars are radially inclined upward. Dome legs arranged in a row, a tension ring connecting circumferentially the connecting portions of each pillar and the lower structure, and a compression ring added to the outermost peripheral portion of the steel truss structure. A dome body portion having a compression ring portion connected to an upper end of each of the pillars of the dome leg portion, wherein the inclination of the dome leg portion is smaller than the inclination of the dome curved surface on the outer peripheral side of the dome body portion. Dome roof building characterized by setting.