A steel center axis force member passes through a steel buckling-restriction member. A stick preventing coat is disposed between the surface of the center axis force member and the buckling-restriction member. Thereby, a buckling-restriction bracing member having a narrower body and lighter weight can be provided to facilitate a rapid manufacture with lower cost.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
This invention relates to a new buckling-restriction bracing member used as 
a structural element resisting a horizontal force, such as an earthquake 
force or wind force, for a structure such as a building or the like. 
2. Description of the Prior Art 
A bucking-restriction bracing member used for a structure such as a 
building or the like is well known in the art. As disclosed in Japanese 
Utility Model Laid-open No. 63-101603, the conventional 
buckling-restriction bracing member comprises a steel center axis force 
member passing through a buckling-restriction concrete member reinforced 
by a steel material, and a stick preventing coat disposed between the 
surface of the center axis force member and the concrete member. 
The conventional buckling-restriction bracing member set forth above has 
significant drawbacks. The buckling-restriction bracing member is made of 
the buckling-restriction concrete member reinforced by the steel material. 
Accordingly, it is disadvantageous, e.g., to transport, carry, or erect 
(lift by a crane) the buckling-restriction bracing member during 
construction due to heavy weight thereof. Concrete is filled into a steel 
pipe to manufacture the buckling-restriction concrete member reinforced by 
the steel material. The buckling-restriction concrete member requires 
complicated manufacturing processes such as installation of form, 
provision of concrete, cure for concrete, and removal of form, thereby 
resulting in high cost. Additionally, the cure for concrete takes a few 
days so that a long term is required for manufacturing the 
buckling-restriction bracing member. There is another disadvantage that a 
larger buckling-restriction bracing member causes a greater dead space in 
view of a building plan. 
SUMMARY OF THE INVENTION 
It is a principal object of the present invention to provide a narrower and 
lighter buckling-restriction bracing member comprising a steel center axis 
force member passing through a steel buckling-restriction member, and a 
stick preventing coat disposed between the surface of the steel center 
axis force member and the buckling-restriction member. 
It is another object of the present invention to enable to more rapidly 
manufacture the buckling-restriction bracing member with lower cost.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
FIGS. 1 through 3 show a buckling-restriction bracing member according to a 
first embodiment of the present invention. In a steel buckling-restriction 
member 1, steel rib plates 4 for reinforcement are rigidly fixed by 
welding on the respective surfaces of the respective ends of a steel 
center axis force member 2 which is formed of band steel plate. A 
plurality of bolt through holes 5 are provided in the respective ends of 
the steel center axis force member 2 and the rib plates 4. A stick 
preventing coat 3 is applied to the whole surface of an intermediate 
portion of the steel center axis force member 2. Steel 
buckling-restriction member bodies 6 each having a channel section are 
disposed on the respective sides of the steel center axis force member 2. 
Band steel plates 8 are disposed along flanges 7 of the respective steel 
buckling-restriction member bodies 6. The flanges 7 are clamped with many 
bolts 9 to the band steel plates 8. Further, the stick preventing coat 3 
contacts with the whole inner periphery of the steel buckling-restriction 
member 1. 
FIG. 4 shows a buckling-restriction bracing member according to a second 
embodiment of the present invention. In a steel buckling-restriction 
member 1, a steel center axis force member 2 has a cross-shaped section. 
Four steel buckling-restriction member bodies 6 each having an L-shaped 
section are disposed around the steel center axis force member 2. Rod-type 
steel spacers 10 are disposed between the respective side edges of the 
adjacent steel buckling-restriction member bodies 6. The respective side 
edges of the adjacent steel buckling-restriction member bodies 6 are 
clamped with many bolts 9. The rest is the same construction as in the 
case of the first embodiment as shown in FIGS. 1 through 3. 
FIG. 5 shows a buckling-restriction bracing member according to a third 
embodiment of the present invention. In a steel buckling-restriction 
member 1, two steel buckling-restriction member bodies 6 each provided 
with a groove having a channel section are disposed such that the 
respective grooves are opposed to each other. The respective side edges of 
the respective steel buckling-restriction member bodies 6 are clamped with 
many bolts 9. The rest is the same construction as in the case of the 
first embodiment as shown in FIGS. 1 through 3. 
FIG. 6 shows a buckling-restriction bracing member according to a fourth 
embodiment of the present invention. In a steel buckling-restriction 
member 1, two steel buckling restriction member bodies 6 each having a 
T-shaped section are disposed such that respective plate portions of the 
steel buckling-restriction member bodies 6 are disposed in spaced apart 
parallelism with each other. Rod-type steel spacers 10 are disposed 
between the respective side edges of the respective steel 
buckling-restriction member bodies 6. The side edges of the respective 
steel buckling-restriction member bodies 6 are clamped with many bolts 9. 
The rest is the same construction as in the case of the first embodiment 
as shown in FIGS. 1 through 3. 
FIG. 7 shows a buckling-restriction bracing member according to a fifth 
embodiment of the present invention. In a steel buckling-restriction 
member 1, two square steel pipes 11 are disposed in spaced apart 
parallelism with each other. Band steel plates 8 are disposed between a 
pair of coplanar plate bodies of the two square steel pipes 11. The 
respective side edges of the band steel plates 8 are rigidly fixed by 
welding on the square steel pipes 11. The rest is the same construction as 
in the case of the first embodiment as shown in FIGS. 1 through 3. 
FIGS. 8 through 10 show a buckling-restriction member according to a sixth 
embodiment of the present invention. The buckling-restriction bracing 
member includes a steel center axis force member 2 having an H-shaped 
section, and a steel buckling-restriction member 1 formed of a square 
steel pipe. Further, a stick preventing coat 3 is closely disposed between 
the respective flanges 12 of the steel center axis force member 2 and the 
plate bodies 13 of the steel buckling-restriction member 1. A plurality of 
bolt through holes 5 are provided in the respective ends of the steel 
center axis force member 2. 
FIG. 11 shows a buckling-restriction member according to a seventh 
embodiment of the present invention. A steel buckling-restriction member 1 
comprises a steel center axis force member 2 having a H-shaped section. A 
pair of steel buckling-restriction member bodies 6 each having a channel 
section are disposed in grooves of the steel center axis force member 2. 
Band steel plates 8 are disposed in overlying relation to the outer 
surface of the respective flanges 14 of the steel center axis force member 
2. Rod-type steel spacers 10 are disposed between the respective sides of 
the band steel plates 8 and the flanges 15 of the steel 
buckling-restriction member bodies 6. The side edges of the band steel 
plates 8 and the side edges of the flanges 15 of the steel 
buckling-restriction member bodies 6 and the steel spacers 10 are clamped 
with bolts 9. A stick preventing coat 3 is closely disposed between the 
whole periphery of the steel center axis force member 2 and the inner 
periphery of the steel buckling-restriction member 1. A plurality of bolt 
through holes are provided in the flanges 14 at the respective ends of the 
steel center axis force member 2. 
FIGS. 12 through 14 show a buckling-restriction member according to an 
eighth embodiment of the present invention. In a steel 
buckling-restriction member 1, a steel center axis force member 2 formed 
of a circular steel pipe passed through the steel buckling-restriction 
member 1 formed of a circular steel pipe. A stick preventing coat 3 is 
closely disposed between the steel buckling-restriction member 1 and the 
whole surface of the steel center axis force member 2. Steel connecting 
plates 17 with a cross-shaped section have many bolt through holes 5. The 
steel connecting plates 17 are rigidly fixed by welding through steel 
connectors 18 on the respective ends of the steel center axis force member 
2 projecting from the respective ends of the steel buckling-restriction 
member 1. 
Form parting agent, oil paint, asphalt, tar, rubber and so on may be used 
as the stick preventing coat 3 of the present invention. 
This invention is clearly new and useful. Moreover, it was not obvious to 
those of ordinary skill in this art at the time it was made, in view of 
the prior art considered as a whole as required by law. 
It will thus be seen that the objects set forth above, and those made 
apparent from the foregoing description, are efficiently attained and 
since certain changes may be made in the above construction without 
departing from the scope of the invention, it is intended that all matters 
contained in the foregoing construction or shown in the accompanying 
drawings shall be interpreted as illustrative and not in a limiting sense. 
It is also to be understood that the following claims are intended to cover 
all of the generic and specific features of the invention herein 
described, and all statements of the scope of the invention which, as a 
matter of language, might be said to fall therebetween. 
Now that the invention has been described.