JP2878335B2 - Tensioned dome and its construction method - Google Patents

Description

The present invention relates to a tensioned dome mainly applied to a building requiring a large space, such as an indoor stadium or an exhibition hall, and a construction method thereof.

[Conventional technology]

In recent years, the so-called membrane construction method has been adopted as a construction method for buildings that require a large space such as an indoor stadium, but the main method is to apply tension to the membrane surface using air pressure, An air support dome of a form stabilizing method, a dome formed by a combination of a skeleton and a membrane that supports the membrane by a skeleton, and a cable that supports the membrane by a cable and stabilizes the form by a cable Domes and the like have been considered and implemented.

[Problems to be solved by the invention]

However, since the air support dome needs to keep the indoor air pressure higher than the external air pressure at all times, the running cost is high and the economical aspect is regarded as a problem.

In addition, since the dome composed of the frame and the membrane material maintains the tension of the membrane material, and its own weight and other loads are mostly resisted by the compressive force of the frame, in order to obtain a large span space, it is necessary to prepare the seat of the frame member in the seat. The cross section needs to be considerably large. For this reason, the weight of the frame member increases along with the increase in span, making it difficult to carry out and carry out work, and the like, and the increase in material cost is inevitable as the member cross section increases.

Furthermore, although the cable dome can maintain a stable form at the time of completion, there is a problem in that the cable dome has a large degree of freedom in deformation during construction and lacks stability.

The present invention has been proposed in order to solve the above problems, not to mention after completion, but also by installing the main structural members in a state where the tensile force is introduced from the middle of construction to completion. To provide a tensioned dome and a construction method thereof that can be maintained in a stable form, save labor for supporting work by cantilever construction, reduce the weight of members, and enable economical construction associated therewith. Aim.

[Means for solving the problem]

A tensioned dome according to claim 1 of the present invention comprises: a foundation constructed on the outer periphery of the tensioned dome to be constructed; a ring beam erected in a substantially circular shape on the foundation; A truss beam composed of a plurality of hoop beams laid concentrically along the ring beam inside the ring beam, and a plurality of upper chord members, lower chord members, diagonal members, and bundle members, and a base end side A plurality of ridge beams radially erected as cantilevers outward from the center of the tensioned dome while being fixed to the foundation and joined to the ring beam and the hoop beam, respectively, and The hoop beam, the upper chord, the lower chord, and the diagonal are each constructed by introducing a tensile force.

A tensioned dome according to claim 2 according to the present invention includes a foundation constructed around the tensioned dome to be constructed, a ring beam erected in a substantially circular shape on the foundation, A plurality of hoop beams installed concentrically along the ring beam inside the ring beam, and radially outward from the center of the tensioned dome while being joined to the ring beam and the hoop beam, respectively. A plurality of lower chord members, one end of which is connected to the foundation, and the other end of which is connected to a joint between the hoop beam and the lower chord member, and is radially outwardly provided from a central portion of the tensioned dome. And a plurality of diagonal members are provided, and the hoop beam, the lower chord member, and the diagonal member are each constructed by introducing a tensile force.

According to a third aspect of the present invention, there is provided a method for constructing a tensioned dome, wherein a foundation is constructed on an outer periphery of the tensioned dome to be constructed, and a ring beam is continuously formed in a substantially circular shape on the foundation. A first lower chord member and a first diagonal member are respectively protruded from the foundation toward the center of the tensioned dome, and a base end of the first lower chord member is joined to the joint between the ring beams. , The base end of the first diagonal member is fixed to the foundation, and the distal end of the first lower chord material and the distal end of the first diagonal material are joined to each other, and then the first lower chord is A first hoop beam is continuously laid in a substantially circular shape along the ring beam between joints between the first hoop beam and the first diagonal member, and the first hoop beam is tensioned by tensioning the first hoop beam. And introducing a tensile force to the first diagonal member, and then the first lower chord member and the A first bundle is erected at each joint between the first slant and the first hoop beam, and a first upper chord is erected between an upper end of the first bundle and a base end of the first slant. Then, the first lower chord member, the first diagonal member, the first bundle member, the joint between the first hoop beam, and the joint between the first bundle member and the first upper chord member, (2) A lower chord member and a second diagonal member are respectively protruded toward the center of the tensioned dome and their tips are joined to each other. Then, a joint between the second lower chord member and the second diagonal member is formed. A second hoop beam is provided in a substantially circular shape along the ring beam and the first hoop beam, and the second hoop beam is tensioned to apply a tensile force to the second lower chord member and the second diagonal member. Then, a second bundle is erected at each joint between the second lower chord, the second diagonal, and the second hoop beam. , The second
A second upper chord member is erected between the upper end portion of the bundle member and a joint between the second diagonal member, the first bundle member, and the first upper chord member. The upper chord material, the lower chord material, the diagonal material, the bundle material, and the hoop beam are sequentially installed.

In the construction method of a tensioned dome according to claim 4 of the present invention, a foundation is constructed on the outer periphery of the tensioned dome to be constructed, and a ring beam is continuously formed in a substantially circular shape on the foundation. A first lower chord member and a first diagonal member located above the first lower chord member and projecting from the foundation toward the center of the tensioned dome; An end is joined to the joint between the ring beams, a base end of the first diagonal member is fixed to the foundation, and a distal end of the first lower chord member and a distal end of the first diagonal member are connected to each other. The first hoop beam is laid in a substantially circular shape along the ring beam between the joined portions of the first lower chord member and the first diagonal member, and the one hoop beam is tensioned to form the first hoop beam. A tensile force is introduced into the first lower chord material and the first diagonal material, and then the first lower chord material and A second lower chord member is radially protruded from the joint between the first diagonal member and the first hoop beam, and a second diagonal member is radially protruded from the foundation toward the center of the tensioned dome. The second hoop beam is laid in a substantially circular shape along the first hoop beam and the ring beam between the joining portions of the second diagonal member and the second lower chord member. Tensioning the hoop beam to introduce a tensile force to the second lower chord member and the second diagonal member, and setting the third, fourth,... Lower chord member, diagonal member and the hoop beam sequentially in the same manner. Features.

〔Example〕

Hereinafter, a tensioned dome according to an embodiment of the present invention will be described with reference to an embodiment shown in FIG. 1 (see FIGS. 1 to 5).

Tensioned Dome A (hereinafter referred to as "Dome A")
Is a foundation (not shown) constructed of reinforced concrete or the like on the outer periphery of the dome A, a ring beam 1 continuously erected in a substantially circular shape on the foundation, and a ring beam 1 inside the ring beam 1. Of the dome A while joining the hoop beam 2 and the hoop beam 2 above the ring beam 1 and the hoop beam 2, respectively, and a plurality of hoop beams 2 installed concentrically continuously along the And a plurality of ridge beams 3 radiating outward from the center.

The ring beam 1 is fixed on a foundation (not shown) constructed of reinforced concrete or the like on the outer periphery of the dome A,
In addition, they are continuously installed in a substantially circular shape while being joined to each other.

The hoop beam 2 is joined to the ridge beam 3 inside the ring beam 1, and is connected to the ridge beam 3 along the ring beam 1 while being connected to the ridge beam 3 while being joined to each other according to the construction scale of the dome A. .

The ridge beam 3 is joined to the ring beam 1 and the plurality of hoop beams 2 and radially extends outward from the center of the dome A while being joined to the lower chord member 4. The upper chord material 5 erected radially outward from the central portion of the dome A along the dome A, and a plurality of diagonal members 6 and a bundle material 7 erected between the lower chord material 4 and the upper chord material 5. It is configured. Further, a tensile force is introduced into each of the lower chord member 4, the upper chord member 5, and the diagonal member 6 by tensioning the hoop beam 2.

For this reason, each component of the hoop beam 2 and the ridge beam 3 does not fluctuate or wobble after the construction and completion of the dome A, thereby improving the safety of the construction and constructing a dome A that is structurally extremely stable. it can.

In addition, a tension force can be introduced to other members by tensioning members other than the hoop beam 2.

The ridge beam 3 is continuously radiated outward from the center of the dome A while being joined to a joint between the ring beams 1 and a joint between the hoop beams 2. Further, the ridge beam 3 is configured such that the beam formation at the base end portion is the largest, and the beam formation gradually decreases toward the center of the dome A. That is, the ridge beam 3 is received at the center of the dome A and gradually becomes tapered. It is constructed as a substantially triangular truss beam, and the base end is erected as a cantilever beam fixed to the foundation.

The ridge beam 3 does not necessarily need to have such a shape, and may be a parallel string truss. Further, since the ridge beam 3 is configured as a cantilever, it is possible to omit a support work required to support the ridge beam 3 during construction.

The lower chord member 4 is continuously radiated outward from the center of the dome A while being joined to the joint between the ring beams 1 and the joint between the hoop beams 2. The bottom end of the outermost lower chord member 4 of the lower chord member 4 is firmly fixed to the foundation together with the ring beam 1.

The bundle 7 is installed substantially vertically at the joint between the hoop beam 2 and the lower chord 4, and the longest bundle 7 is installed at the outermost joint between the hoop beam 2 and the lower chord 4. A short bundle 7 is erected as it moves to the center of the dome A.

The upper chord material 5 is continuously radiated outwardly from the center of the dome A along the lower chord material 4 on the upper side of the lower chord material 4,
Each is joined to the upper end of the bundle 7.

The base end of the outermost upper chord member 5 of the upper chord member 5 is firmly fixed to the foundation and supported.

The diagonal member 6 is provided between the joint between the hoop beam 2, the lower chord 4 and the bundle 7, and the joint between the upper chord 5 and the bundle 7. Further, of the diagonal members 6, the base end of the outermost diagonal member 6 is firmly fixed to and supported by the foundation together with the base end of the outermost upper chord member 5.

The lower chord 4, upper chord 5, and diagonal 6 of the ridge beam 3
The ends of the bundle member 7 are joined by a joining structure capable of smoothly introducing a tensile force when a tensile force is introduced by tensioning the hoop beam 2 to these members, such as a pin joint. .

The diagonal member 6 is provided between the hoop beam 2, the lower chord member 4, and the bundle member 7, and the dome between the joint portions between these members and the upper chord member 5 and the bundle member 7 adjacent to the dome A in the circumferential direction. It may be installed along the circumferential direction of A (see FIG. 5).

The ring beam 1, the hoop beam 2 and the ridge beam 3 are made of a common building material such as a steel pipe, a section steel, or a composite material thereof.
Except for these components, tensioning PC steel is further used.

Under the dome A configured as described above, the membrane roofing material 8 is located above or below the hoop beam 2 and the lower chord material 4.
Is attached over the entire surface of the dome A.

As a method of attaching the membrane roofing material 8, the membrane roofing material 8 is suspended at each joint of the dome constituent members below the hoop beam 2 and the lower chord material 4, and the tension is always applied to the membrane roofing material 8 so as to be stable. (See FIG. 4), or simply put on the hoop beam 2 and the lower chord member 4 (see FIG. 3), or use an auxiliary cable in combination with the above-mentioned mounting method.

Next, the construction method of the tensioned dome according to claim 3 of the present invention will be described in order (FIG. 8, FIG.
(See FIGS. 9 and 10).

First, a foundation is constructed of reinforced concrete or the like, and the ring beams 1 are continuously erected in a substantially circular shape while being joined to each other and fixed to the foundation.

Next, the first diagonal member 50 and the first lower chord member 51 are respectively protruded from the foundation toward the center of the dome A, and the tips are joined together. The base end of the first diagonal member 50 is fixed to the base, and the base end of the first lower chord member 51 is fixed to the base together with the ring beam 1.

Next, between the joints between the first diagonal member 50 and the first lower chord member 51,
The first hoop beam 52 is continuously provided in a substantially circular shape along the ring beam 1 and the first hoop beam 52 is tensioned so that the first diagonal member 50 and the first lower chord member 51 are not shaken. Fixed to. In this case, the first hoop beam
By tensioning 52, a predetermined amount of tensile force is introduced into first diagonal member 50 and first lower chord member 51.

Next, a first bundle 53 is erected at each joint of the first diagonal member 50, the first lower chord member 51, and the first hoop beam 52, and the upper portion of the first bundle member 53 and the base are interposed. The first upper chord material 54 is erected.

Next, the second lower chord member 57 and the second lower chord member 57 are joined from the joint between the first diagonal member 50, the first lower chord member 51, and the first hoop beam 52, and the joint between the first bundle member 53 and the first upper chord member 54. The diagonal members 56 are protruded toward the center of the dome A, respectively, and the tips are joined together.

Next, a second hoop beam 58 is erected in a substantially circular shape along the first hoop beam 52 between the joint between the second diagonal member 56 and the second lower chord member 57, and the second hoop beam 58 is The second diagonal member 56 and the second lower chord member 57 are fixed so as not to be shaken by being tensioned similarly to the first hoop beam 52.

In this case, a predetermined large tension is introduced to the second diagonal member 56 and the second lower chord member 57 by tensioning the second hoop beam 58.

Next, a second bundle 59 is erected at the joint between the second diagonal member 56, the second lower chord member 57, and the second hoop beam 58, and the upper end of the second bundle 59 and the first bundle 53 Between the upper ends of the
The upper chord material 60 is erected.

Thereafter, similarly, the third, fourth,... Upper chord material, lower chord material, diagonal material, bundle material, and hoop beam are sequentially installed to complete the entire frame of the dome A, and finally, the membrane roof material 8 is attached.

6 and 7 show an embodiment of the tensioned dome according to the second aspect of the present invention, which will be described below.

Tensioned Dome A (hereinafter referred to as "Dome A")
Is a base (not shown) constructed of reinforced concrete or the like on the outer periphery of the dome A, a ring beam 1 erected in a substantially circular shape on the base, and a substantially circular shape inside the ring beam 1. A plurality of hoop beams 2 and a plurality of lower chord members 4 and a plurality of diagonal members 6 which are continuously provided radially outward from a central portion of the dome A. Have been.

The ring beam 1 is located on the outer periphery of the dome A and is continuously provided in a substantially circular shape. The hoop beam 2 is continuously installed concentrically inside the ring beam 1, and is also installed multiple times according to the construction scale of the dome A.

The lower chord material 4 is continuously radiated outward from the center of the dome A while being joined to the joint between the ring beams 1 and the joint between the hoop beams 2, respectively.
The base end of the outermost lower chord member 4 is fixed to the foundation together with the ring beam 1, and the remaining lower chord member 4 is supported by suspending a joint between the lower chord member 4 and the hoop beam 2 with a diagonal member 6. In this case, the base end of each diagonal member 6 is fixed to a foundation constructed on the outer periphery of the dome A.

Further, the hoop beam 2 is erected in a tensioned state,
As a result, tensile force is introduced into the lower chord 4 and the diagonal 6,
The hoop beam 2, the lower chord 4 and the diagonal 6 are fixed so as not to be shaken. A membrane roofing material 8 is attached to the lower or upper side of the hoop beam 2 and the lower chord material 4. The other configuration is substantially the same as the tensioned dome of the previous invention.

With such a configuration, construction materials can be greatly saved by omitting the upper chord material and the bundle material, which is extremely economical.

Next, the construction method of the tensioned dome according to claim 4 of the present invention will be described in order (FIG. 11,
(See FIGS. 12 and 13).

First, a foundation is constructed of reinforced concrete or the like, and a ring beam 1 is continuously erected in a substantially circular shape thereon, and a joint between the ring beams 1 is fixed to and supported on the foundation.

Next, the dome A starts from the joint of the ring beams 1.
A first lower chord member 51 is protruded in the center direction, and the front end thereof is suspended and supported by a first diagonal member 50 from above. In this case, the base end of the first diagonal member 50 is fixedly supported on the foundation on which the ring beam 1 is supported.

Next, the first hoop beam 52 is laid in a substantially circular shape along the ring beam 1 between the joints between the first diagonal member 50 and the first lower chord member 51, and the first hoop beam 52 is tensioned. Thereby, the first diagonal member 50 and the first lower chord member 51 are fixed so as not to be shaken. In this case, by pulling the first hoop beam 52, a tensile force is introduced into the first diagonal member 50 and the first lower chord member 51.

Next, the second lower chord member is moved from the joint of the first diagonal member 50, the first lower chord member 51, and the first hoop beam 52 toward the center of the dome A.
A 57 is erected and its tip is suspended and supported by a second diagonal member 56. In this case, the base end of the second diagonal member 56 is fixedly supported on the base on which the ring beam 1 is supported, similarly to the base end of the first diagonal member 50.

Next, a second hoop beam 58 is laid in a substantially circular shape along the ring beam 1 between the joints between the second lower chord member 57 and the second diagonal member 56, and the second hoop beam 58 is tensioned. Thereby, the second diagonal member 56 and the second lower chord member 57 are fixed so as not to be shaken. Also in this case, by pulling the second hoop beam 58, a tensile force is introduced to the second diagonal member 56 and the second lower chord member 57.

Thereafter, similarly, the third, fourth,... Lower chord members, diagonal members, and hoop beams are sequentially erected to construct the entire dome A, and finally, the membrane roof member 8 is attached.

〔The invention's effect〕

The tensioned dome according to claims 1 and 3 according to the present invention, and the method of constructing the tensioned dome, comprises:
A foundation constructed on the outer periphery of the dome, a ring beam erected in a substantially circular shape on the foundation, a plurality of hoop beams erected concentrically along the ring beam inside the ring beam, The tensioned dome is formed as a truss beam from a plurality of upper chords, lower chords, diagonals and bundles, and has a base end fixed to the foundation and joined to the ring beam and the hoop beam, respectively. A plurality of ridge beams radially erected as cantilevers outward from the center of the hoop beam, and the hoop beam, the upper chord material, the lower chord material, and the diagonal material are each provided with a tensile force. As a result, the dome components do not fluctuate during or after construction, ensuring the construction safety and providing a structurally extremely stable tensioned dome. There is a kill effect.

In addition, since no support work is required, temporary construction work can be omitted, shortening the construction period and greatly reducing construction costs, and can be used not only for circular domes but also for construction of oval domes and large square roofs. it can.

According to a second aspect of the present invention, there is provided a tensioned dome and a method of constructing the tensioned dome, the foundation being constructed on the outer periphery of the tensioned dome to be constructed, and a substantially circular shape being laid on the foundation. A ring beam, a plurality of hoop beams installed concentrically along the ring beam inside the ring beam, and a center of the tensioned dome while being joined to the ring beam and the hoop beam, respectively. A plurality of lower chords radially erected outward from the portion, and a central portion of the tensioned dome while joining one end to the base and the other end to a joint between the hoop beam and the lower chord. And a plurality of diagonal members radially erected outward from, and the hoop beam,
Since the lower chord material and the diagonal material are each provided with a tensile force, the dome component does not fluctuate during and after the construction, which makes it possible to achieve construction safety and provide a structurally extremely stable tensioned member. There is an effect that a dome can be provided.

In addition, since no support work is required, temporary construction work can be omitted, shortening the construction period and greatly reducing construction costs, and can be used not only for circular domes but also for construction of oval domes and large square roofs. it can.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 5 show one embodiment of the tensioned dome according to the first aspect of the present invention, and FIGS.
FIGS. 5 and 5 are perspective views showing the entire tensioned dome, FIGS. 3 and 4 are longitudinal sectional views thereof, and FIGS. 6 and 7 are claims 2 according to the present invention. FIG. 8, FIG. 9, FIG. 9 and FIG. 10 show an embodiment of a tensioned dome construction method according to claim 3 of the present invention. Process drawing, No.
FIG. 12 FIG. 12 and FIG. 13 are process drawings of one embodiment of the method for constructing a tensioned dome according to claim 4 of the present invention. 1 ... ring beam, 2 ... hoop beam, 3 ... ridge beam, 4 ... lower chord material, 5 ... upper chord material, 6 ... diagonal material, 7 ... bundle material, 8 ... membrane roof material, A ... Dome (tensioned dome).

Claims (4)

(57) [Claims] 1. A foundation constructed on the outer periphery of a tensioned dome to be constructed, a ring beam erected in a substantially circular shape on the foundation, and a concentric circle inside the ring beam along the ring beam. A plurality of hoop beams erected in a shape, a plurality of upper chords, lower chords, diagonals and bundles are configured as truss beams, and the base end side is fixed to the foundation, and the ring beams and the A plurality of ridge beams radially erected as cantilevers outward from the center of the tensioned dome while being joined to the hoop beam, respectively, and the hoop beam, the upper chord material, the lower chord material and A tensioned dome, wherein a tensile force is applied to each of the diagonal members. 2. A foundation constructed on the outer periphery of a tensioned dome to be constructed, a ring beam erected on the foundation in a substantially circular shape, and a concentric circle inside the ring beam along the ring beam. A plurality of hoop beams erected in a shape, a plurality of lower chord members erected radially outward from a central portion of the tensioned dome while being joined to the ring beam and the hoop beam, respectively, and one end thereof The foundation includes a plurality of diagonal members radially erected radially outward from a central portion of the tensioned dome while joining the other end to a joint between the hoop beam and the lower chord member, respectively, and A tensioned dome, wherein a tensile force is applied to each of the hoop beam, the lower chord member, and the diagonal member. 3. A foundation is constructed on the outer periphery of the tensioned dome to be constructed, and a ring beam is continuously erected on the foundation in a substantially circular shape. A first lower chord member and a first diagonal member project in the direction, a base end of the first lower chord member is fixed to a joint between the ring beams, and a base end of the first diagonal member is the The first lower chord material is fixed to a foundation,
The tips of the diagonal members are joined to each other, and then a first hoop beam is continuously erected in a substantially circular shape along the ring beam between junctions of the first lower chord member and the first diagonal member. At the same time, the first hoop beam is tensioned to introduce a tensile force to the first lower chord member and the first diagonal member.
A first bundle is erected at each joint between the lower chord, the first diagonal, and the first hoop beam, and a first bundle is provided between an upper end of the first bundle and a base end of the first diagonal. (1) erection of the upper chord material, and then the joining portion of the first lower chord material, the first diagonal material, the first bundle material, and the first hoop beam, and the first bundle material and the first hoop beam.
A second lower chord member and a second diagonal member are respectively protruded from the joint with the upper chord member toward the center of the tensioned dome, and the distal ends thereof are joined to each other. A second hoop beam is laid in a substantially circular shape along the ring beam and the first hoop beam between the joints with the two diagonal members, and the second hoop beam is tensioned to tighten the second hoop beam and the second hoop beam. A tensile force is introduced into the second diagonal member, and then a second bundle is erected at each joint between the second lower chord member, the second diagonal member, and the second hoop beam, and A second upper chord member is provided between the upper end portion and a joint between the second diagonal member, the first bundle member, and the first upper chord member. A method for constructing a tensioned dome, comprising sequentially laying a lower chord, a diagonal, a bundle, and a hoop beam. 4. A foundation is constructed on the outer periphery of the tensioned dome to be constructed, and a ring beam is continuously erected in a substantially circular shape on the foundation, and then the center of the tensioned dome is extended from the foundation. A first lower chord member and a first diagonal member protrudingly located above the first lower chord member in the direction, and joining a base end of the first lower chord member to a joint between the ring beams,
A base end of the first diagonal member is fixed to the foundation, and a distal end of the first lower chord member and a distal end portion of the first diagonal member are joined to each other. A first hoop beam is laid in a substantially circular shape along the ring beam between joints with the one diagonal member, and the one hoop beam is tensioned to apply a tensile force to the first lower chord member and the first diagonal member. Then, the second lower chord is joined from the joint of the first lower chord, the first diagonal and the first hoop beam, and the second diagonal from the base is radiated toward the center of the tensioned dome. , And the ends thereof are joined to each other, and then a second hoop beam is applied between the joint between the second diagonal member and the second lower chord member along the first hoop beam and the ring beam. The second hoop beam and the second lower chord member are stretched in a substantially circular shape and the second hoop beam is tensioned. It said second introducing a tensile force to the slant member, the third in the same manner, the fourth, ... lower chord member, building construction method of the tension de dome, characterized by sequentially installing diagonals and hoop beam.