JPS6356374B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of constructing a circular dome-shaped building having a large space such as a gymnasium.

Traditionally, buildings have a reinforced concrete structure,
There are steel frame structures, suspension structures, air membrane structures, etc., and each of these structures has unique characteristics in construction, use, appearance, etc., and is appropriately selected depending on the purpose of the building.

In particular, steel structures use steel frames for the main members, which correspond to the pillars and beams of buildings.

In order to create a large space with such a steel structure,
Columns are inevitably tall, beams and girders have large spans,
It is common practice to join individual components with bolts, etc., which requires large-scale temporary construction materials such as scaffolding, involves dangerous work that must be done directly by workers, and , pillar construction and beams,
A large lifting machine is required to lift the girder.

In addition, in order to eliminate such risks, large-scale temporary construction, large lifting machines, etc., or for the purpose of shortening the construction period, it is possible to assemble roof members on the ground and use pre-erected pillar members. A construction method has been developed in which roof members are lifted up, but this method inevitably requires columns erected vertically, and this method cannot be used for structures with walls on the sides, or it is difficult to use them for structures with side walls. It is necessary to build a department.

In addition, steel materials have the characteristic that the limit values of compressive stress and tensile stress are approximately equal as internal stresses in response to external forces, but in conventional steel structures, the magnitude of the external force applied to the structure depends on the structural members. was limited by the internal stress of That is, when designing a structure, if the internal stress generated in a structural member is tensile stress, it is designed to be within the tensile limit of the member itself (the same applies to compressive stress).

However, there is nothing that can cope with a large external force by shifting the internal stress of a member caused by the action of an external force from tensile stress to compressive stress or from compressive stress to tensile stress.

In prestressed concrete, the high tensile strength of steel wires is used to reinforce areas of concrete with weak tensile strength, but the principle of stress conversion has not been applied to the steel itself.

The present invention utilizes the principle that if both ends of an elastic rod-like object are drawn together, it will curve in the vertical direction, and one end of a plurality of these rod-like objects is fixed to a circular steel plate, and the circular steel plate is the center of the rod-like object. By moving the other end of each rod-like object toward the circular steel plate with the rod-like objects arranged radially, each elastic rod-like object is bent in the vertical direction while lifting the circular steel plate vertically upward. The present invention provides a method for constructing a circular dome-shaped building.

An embodiment of the present invention will be explained with reference to the drawings. First, as shown in FIG. on the outer periphery,
Elastic rod-shaped bodies 2, 2...2 of a predetermined length that serve as beam members
are arranged radially at predetermined intervals in the circumferential direction, and one end of these rod-like bodies 2 is rigidly connected to the outer circumference of the circular steel plate 1 by welding or screwing.

At this time, the rod-shaped body 2 and the circular steel plate 1 are supported by a pedestal 3, and the free end (other end) of the rod-shaped body 2 hangs down, and the other end is supported by a horizontal guide 4 to prevent lateral movement. to bound.

Next, as shown in FIG. 2, a column 6 is inserted into the hole 5 at the center of the circular steel plate 1, and the column 6 is erected and fixed in a vertical position. and the other end is fixed to the ground. Note that this pillar 6 does not necessarily need to be provided.

Further, the other end of each rod-shaped body 2 is connected to one end of a cable 9 such as a wire, and the other end of the cable 9 is installed in the base end 10 of the column 6 to pull the cable such as a center hole jack. A circular steel plate 1 is connected to a device 11, and by activating the pulling device 11 to pull the cable 9, each rod-like body 2 is curved vertically upward in an arc shape, and one end of these rod-like bodies 2 is fixed. is lifted to a predetermined height along the pillars 6 to form a curved beam member 2a with the rod-shaped body 2, and the other end of the beam member 2a is fixed to the underground foundation 12 to form the skeleton of the building ( This state is shown in FIG. 3).

Next, remove the tru wire 8 and the pillar 6, and
As shown in the figure, the curved beam member 2a is connected to the connecting member 1.
3, and a roof material 14 is attached to construct a dome-shaped building 15.

Note that the method of fixing the other end of the beam member 2a is based on the foundation 1.
2, the other ends of the beam members 2a, 2a facing each other in the diametrical direction may be tied to each other with a cable or the like, and the cable may be placed under the floor. In the case of a dome, the adjacent beam member 2
It is desirable to connect the end portions of a and 2a with a tension rigid member, and form and fix a tension ring as a whole.

Furthermore, as a means for bending the elastic rod-shaped body 2, a jack is connected to the other end of each elastic rod-shaped body 2 in place of the above-mentioned pulling device 11, and this jack can be moved and fixed freely toward the circular steel plate 1. Good too.

Furthermore, in the above embodiment, a case was explained in which one beam member 2a was installed in the upper and lower planes of the building, but as shown in FIG. The beam member 2b is constructed to provide two upper and lower beam members 2a and 2b, and these beam members 2a and 2b are connected between the connecting members 16 in the right angle direction and the diagonal member 1 is installed.
If 7 is provided, the reaction force due to the elasticity of the entire beam member can be restrained, so that a simple frame that supports only the load in the vertical direction of the beam member can be obtained.

As described above, in the method for constructing a circular dome-shaped building according to the present invention, a highly rigid circular steel plate is placed at the center of the circular dome-shaped building to be constructed, and a plurality of elastic The rod-like bodies are arranged radially, one end of each elastic rod-like body is fixed to a circular steel plate, and the other end is moved toward the circular steel plate, thereby lifting the circular steel plate vertically upward while lifting each elastic rod-like body. It is characterized by forming beam members by curving them in the vertical direction, and fixing the curved lower ends of these beam members to the foundation.
The balance can be maintained by simply moving the other ends of multiple elastic rods arranged radially around a circular steel plate toward the circular steel plate at the same time, without requiring large-scale temporary construction or large lifting equipment. A circular dome-shaped structure can be easily constructed, and in this case, one end of each elastic rod-like body is connected to each other via a circular steel plate placed in the center, so these elastic rod-like bodies do not overlap each other,
Furthermore, it can be accurately bent without tilting in the lateral direction, and furthermore, work at high places and dangerous work can be reduced.

In addition, when an elastic rod is bent, tensile stress acts on the outside surface of the curved surface, and compressive stress acts on the inside surface, while loads from the connecting materials and roofing materials are applied from the outside of the building. External forces such as wind pressure and loads act on the curved elastic rod, and these external forces cause compressive stress to act on the outside of the curved elastic rod-shaped body and tensile stress on the inside. Therefore, these stresses cancel each other out. Compared to conventional steel structures that do not apply prestress, the same members can withstand large external forces, and the weight can be reduced by using fewer members, making it economical.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view showing the construction process, FIG. 2 is an elevation view, FIG. 3 is a front view showing a state in which a curved beam member is formed, and FIG. FIG. 4 is a front view of the dome-shaped building, and FIG. 5 is a partial front view showing another embodiment of the beam member. 1... Circular steel plate, 2... Elastic rod-shaped body, 4... Horizontal guide, 11... Pulling device.

Claims (1)

[Claims] 1. A highly rigid circular steel plate is placed at the center of the circular dome-shaped building to be constructed, and a plurality of elastic rod-like bodies are arranged radially around the outer circumference of this circular steel plate, and these elastic rod-like bodies are With one end fixed to the circular steel plate, the other end is moved toward the circular steel plate, thereby lifting the circular steel plate vertically upward and bending each elastic rod in the vertical direction to form a beam member. A method of constructing a circular dome-shaped building characterized by fixing the curved lower end of the member to the foundation.