JPH0765411B2 - Seismic unit chimney assembly - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a unit chimney having seismic resistance, and in particular, a unit having seismic resistance adapted to follow vibration of a building when the unit chimney is attached to the building. The method of assembling the chimney.

(Prior Art and Problems to be Solved) A flat plate or curved plate having fire resistance or heat insulating properties such as calcium silicate plate (for example, calcium silicate plate).
A chimney in which a flue is constructed and whose outer periphery is fixed to a structure such as a building by an anchor bolt by a steel frame has been widely used as a so-called unit chimney. However, recently, it has become noticeable that non-structural members such as chimneys attached to buildings cause damage due to earthquakes, etc. Therefore, the Architectural Institute of Japan announced in 1985 "Guidelines for seismic design of non-structural members". According to this guideline, "examination for forced deformation" is required so that non-structural members can withstand horizontal deformation of buildings during earthquakes. In this study, the horizontal displacement angle γ ₁ caused by seismic force during a medium earthquake is 1/20.
It is within 0, and empirically the interlayer displacement angle γ ₂ becomes 1/100 for a large earthquake. By the way, a non-structural member such as a chimney has high rigidity and must be sufficiently fixed to a building, but at the same time, it must follow the above deformation, and these two elements conflict with each other. The unit chimney constructed to satisfy both of these has not yet been seen. In addition, it is more difficult to cope with the construction method error of the building at the time of construction as the rigidity is higher.

The inventors of the present invention completed the present invention as a result of various studies on the assembly of the unit chimney that has the above-mentioned high rigidity and is firmly fixed to the building and can follow the deformation of the earthquake. The purpose is to provide a method of assembling a unitary chimney that is earthquake resistant.

(Means for Solving Problems) That is, FIG. 1 is a side view of the chimney, FIG. 2 is an enlarged view of an assembly member, and FIG. is there. A unit part that composes a flue with heat-resistant and fire-resistant plates such as calcium silicate, the outer periphery of which is made up of a corner angle, a truss of a steel frame angle consisting of a joint material and a diagonal material, and conforms to the height of the building Enclose with to form a unit chimney. Since the unit portion of the unit chimney is formed so as to correspond to the height of each floor in the building, for example, the distance of one floor, two floors, etc., the unit portion is provided at the end of the unit. The fixed overhang members (13) are piled up to a predetermined height by fixing the unit fixed overhang members of the adjacent unit parts and the joint plate (12). On the other hand, the slab on each floor of the building is fixed to the building by a fixed angle piece (8) installed on the slab via a slab fixed overhanging member (7) connected to a corner angle surrounding the flue circumference. . By the way, in the present invention, holes for inserting bolts are formed in the joint plate (12) and the fixed angle piece (8) as elliptical loose holes (1) as shown in FIG. 3, and the loose holes (1) are fitted into these loose holes. By passing the oval member (2) through the formed central hole (4) and tightening it with bolts and nuts (3a, 36), the unit fixing extension member (13), the joint plate (12) and the slab portion fixing extension Since the member (7) and the fixed angle piece (8) are assembled and bolts and nuts are tightened through the loose holes, vibration of the building can be easily followed. Also,
When a bolt is simply passed through a loose hole and tightened with a nut, the structure can be followed, but on the other hand, there is a drawback that the unidirectional proof force becomes extremely smaller than when a normal circular bolt hole is tightened. In the present invention, in order to improve such a defect, an oval member which can be fitted in the loose hole is placed in the loose hole, and the length of the contact side between the member and the loose hole is increased to increase the size of the oval member. By passing a bolt through the central hole and tightening it with a nut, it is possible to move freely in one direction, and at the same time, it is possible to obtain the same proof stress as that of a normal bolt joint in the perpendicular direction. The thickness of this ordinary oval member is preferably thinner than the thickness of the joint plate and the fixed angle piece,
Further, it is preferable that the length of the contact surface with the loose hole is longer than the diameter of the bolt passing through the oval member, and the width thereof is smaller than the width of the loose hole so as not to exceed 0.5 mm.

(Effects) As described above, in assembling the unit chimney according to the present invention, since loosening holes drilled in the joint plate and the fixed angle piece are used for tightening, vertical movement due to an earthquake or the like γ ₁ = 1/100 It is able to follow the deformation sufficiently, and at the same time it can follow the extension due to the temperature of the chimney. In addition, since the oval shaped member is used for the loose hole, it has sufficient proof strength in the lateral direction. And the like.

[Brief description of drawings]

1 is an assembled side view of a unit chimney, FIG. 2 (a) is an enlarged view of a portion of FIG. 1 (a), and FIG. 2 (b) is FIG. 1 (b).
FIG. 3 is an enlarged view of a portion, FIG. 3 is an enlarged view of a plane of the assembly member, and FIG. 4 is an enlarged side view of the assembly portion. 1 …… Loose hole 2 …… Oval member 3a …… Bolt, 3b …… Nut 4 …… Center hole 7 …… Slab fixed extension member 8 …… Fixed angle piece 12 …… Joint plate 13 …… Unit fixed extension Element

Claims (1)

[Claims] 1. A unit portion comprising a flat or curved plate having fire resistance and heat insulation, and a flue, the outer periphery of which is composed of a corner angle, a unit fixing extension member, and a steel frame angle truss composed of diagonal members. The unit fixing overhanging member (13) surrounding the unit portion has a length adapted to the height of each floor, and the unit fixing overhanging member (13) provided at the end of the unit portion is the unit fixing overhanging member (13) of the adjacent unit portion. ) And the joint plate (12) to a predetermined height,
In addition, the unit portion is fixed to the building by a fixed angle piece (8) installed on the slab via a slab fixed overhanging member (7) connected to the corner angle surrounding the flue outer circumference on the slab on each floor. The joint plate (12) and the fixed angle piece (8) are provided with a loose hole (1), and a bolt () is inserted through a central hole (4) formed in an oval member (2) which fits into the hole. 3a) and nuts (3b) are used to tighten and assemble the unit fixed overhanging member (13) and the joint plate (12), and the slab fixed overhanging member (7) and the fixed angle piece (8). Method of assembling a sex unit chimney.