JP3136095B2 - Tension generator and tension generating method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension generating device and a tension generating method for generating an inward tension near a stigma or a connecting point between a stigma and a diagonal beam of a ramen structure, particularly a mountain-shaped ramen structure. . The “tension” in the present invention includes pretension added before building an architectural structure and post tension added after building an architectural structure.

[0002]

2. Description of the Related Art A ramen structure is widely used when constructing a building structure having a large space.
The steel material used for the rigid frame structure is determined based on the calculated stress and moment of each part and based on a steel material having a strength capable of withstanding the stress or moment. For example, in a mountain-shaped rigid frame structure in which a diagonal beam extending in an opposing relationship from an adjacent capital is abutted almost at the center, an outward stress is generated in the column, so that the column can withstand the largest of these stresses. Select the steel material. In addition, to the diagonal beam extending from the capital,
Since a bending moment is generated in the direction in which the stress is generated,
The steel material is selected so as to withstand the maximum value of the bending moment.

[0003]

As a factor that increases the cost of a building structure having a large space, steel materials are selected in accordance with the maximum value of the stress or moment generated in each part. There are points that must be addressed. If the generated stress and moment become small, it becomes possible to lower the standard of the steel material and realize a significant cost reduction.

As a means for reducing the stress or moment, an inward tension may be applied near the capital.
(See, for example, Japanese Patent Application No. 7-1119). However, unless a tension having a magnitude and a direction facing the stress due to the vertical load is generated, the static stability of the structure is lacking. If the operation of generating a tension requires a large machine, the cost may be increased. Therefore, an apparatus and a method for generating the same pretension in a direction opposite to the stress caused by the vertical load on adjacent stigmas by a simple operation were studied.

[0005]

As a result of the examination, what has been developed is a hook for connecting a tension auxiliary material extending from each of the adjacent column capitals of a ramen structure and a hook which is provided at a position separated by a certain distance from the hook. The left and right opposing bodies of the symmetrical structure in which a track is erected between the arranged moving parts, the respective trajectories are inserted into the opposing moving parts, and the telescopic part is erected between the opposing moving parts. It is a tension generator (hereinafter, abbreviated as a generator). This generator applies an inward pretension before the construction of a building structure or a post tension after the construction between adjacent capitals of a building structure having a ramen structure, particularly a mountain-shaped ramen structure.

In this generator, the expansion and contraction portions provided between the moving portions which are opposed to each other in a symmetrical structure are extended to make the respective hook portions approach each other, and conversely, the expansion and contraction portions are contracted and contracted. The hook is separated. In this case, both the left opposing body and the right opposing body have an even number of orbits, and the respective tracks of the left opposing body or the right opposing body are equally arranged on both sides of the expansion and contraction section, respectively, and the left opposing body and the right When the arrangement direction of the orbits of the opposing bodies is orthogonal, the opposing bodies can approach and separate stably, and a load is uniformly applied to each part, thereby strengthening the structure.
Further, when the trajectories of the left opposing body and the right opposing body are arranged in an orthogonal relationship, the entire generator can be compactly assembled. Furthermore, when the telescopic part and the engaging part or moving part of each of the left facing body and the right facing body are brought into sliding contact with the suspension base serving as the movement reference, the jack is displaced with the movement of each facing body, and each facing body is moved. The approach and separation of the body become more stable and smooth.

In the tension generating method, the generator is suspended, and the vicinity of the adjacent left capital of the ramen structure and the hook of the left opposing body are connected to the vicinity of the right capital and the hook of the right opposing body. After connecting each with the tension auxiliary material, extend the elastic part and move each hook part inward, and complete the ramen structure with inward pretension applied near each capital, via the tension auxiliary material Finally, the expansion / contraction portion is retracted to loosen the tension assisting material, and the generator is removed. The tensions generated at the stigmas are opposite to each other and equal in magnitude because the stigmas are pulled toward each other via the generator. Thus, in the above-mentioned construction method, there is an advantage that the tension generated on each stigma is reversed and balanced.

As the extendable portion, various cylinders (in particular, hydraulic cylinders) and jacks that extend and contract linearly are preferable. It is only necessary that the tension-assisting material has high tensile strength, such as steel wire or high-tensile steel material. When using high-tensile steel material, connect the capitals and the hooks with a plurality of wires instead of one by one. Therefore, handling of each high-tensile steel material becomes convenient. The trajectories of the left opposing body and the right opposing body respectively are such that the moving part of the other party can move linearly, for example, a sliding hole is provided in the moving part of the left opposing body, and a circle inserted through this sliding hole An example is a form in which a shape rope is provided between a hooking part and a moving part of a left facing body. This track also functions as a strength member for the left facing body or the right facing body.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a generator 1 of the present invention.
2 is a perspective view corresponding to FIG. 1 in which only the left opposing body is taken out and represented by a solid line, FIG. 3 is a plan view of the generator 1, and FIG. 4 omits the suspension base 2 in FIG. FIG. 5 is a plan view showing an assembling relationship between a left opposing body 3 and a right opposing body 4, and FIG.

Referring to FIG. 1, the structure of the generator 1 of this embodiment will be described. The generator 1 includes a long frame made of an angle material as a suspension pedestal 2, and a jack is attached to a support member 5 having an upper edge slidably contacting the suspension pedestal 2 to form an extension portion 6. The left opposing body 3 and the right opposing body 4 in which the sliding portions 33 and 43 of the engaging portions 31 and 41 or the moving portions 32 and 42 are in sliding contact with the suspension base 2 with the portion 6 interposed therebetween. Are arranged. The suspension pedestal 2 includes a leg 7 for preventing the opposing bodies 3 and 4 from touching the ground when the generator 1 is transported and stored, and a hook 8 for connecting a wire or the like when the generator 1 is suspended by a crane. (See FIGS. 1, 3 and 5).

The engaging portions 31, 41 and the moving portions 32, 4 of the opposing bodies 3, 4 are provided.
Reference numeral 2 denotes a hollow inverted T-shaped block (a hooked portion of a left facing body) or a cross-shaped block (a hooked portion of a right facing body and a moving portion of both facing bodies) formed of a steel plate (see FIG. 2). The ends of the telescoping part 6 are connected to the moving parts 32 and 42 which are opposed to each other, and the horizontal orbit 34 provided between the moving part 32 of the left facing body 3 and the hooking part 31 is connected to the right facing body 4. The moving part 42 of the right opposing body 4
A vertical track 44 extending between the hook 42 and the hook 41 is inserted through the moving part 32 of the left opposing body 3. In addition, each track 34, 44 of this example is made of a rope, and one
Each set consists of two sets (see FIGS. 1, 2, 4, and 5). In addition, the end of the tension assisting member 9 configured by connecting a plurality of high-tensile steel materials by a coupler to each of the hooking portions 31 and 41,
Two screws are inserted in parallel in the same horizontal plane, and are fastened with bolts.

A procedure for generating pretension on the adjacent columns 11, 11 of the building structure 10 having the mountain-shaped frame structure by the above-described generator 1 will be described. Fig. 6 shows Japanese Patent Application No. 7-1119.
In the construction of the building structure 10 having the Yamagata ramen structure proposed in the above item, as a procedure 1 for generating the pretension by the generator 1 of this example, the generator 1 is suspended, and the left capital 12 and the left opposing body 3 are hooked. The stop part 31 (refer to FIG. 1 for each part of the generator 1, the same applies hereinafter) is connected to the right capital 13 and the right opposing body 4.
FIG. 5 is a front view showing a state in which the hooking part 41 is connected with a tension assisting material 9. In FIG. 6, the generator 1 is used in a state where the compression member 14 and the left inclined tension member 15 are temporarily assembled and the right inclined tension member 16 is suspended. In addition, the crane which suspends the generator 1 is abbreviate | omitted in the figure.

The generator 1 having the retractable portion 6 sufficiently retracted is suspended by a crane, and the end portions are hooked to the column heads 12, 13 with the hook portions 31, 41 arranged substantially linearly with the column heads. The tension assisting members 9, 9 are extended inward, and the engaging portions 3 of the opposing members 3, 4 are extended.
After passing through the first and the first 41, the bolts are tightened so that the linear distance between the hook 31 (41) and the capital 12 (13) becomes the shortest distance. This example shows a case where the generator 1 and the capitals 12, 13 are arranged in a linear relationship in a horizontal plane. However, depending on the building structure, the height of each capital is different. When connecting the stigma to each generator, there is no problem if the tension assisting member is adjusted so as to connect the stigma to the generator at the shortest distance.

FIG. 7 shows a state in which the expansion and contraction portions 6 are extended from the state of FIG. FIG. 8 is a front view corresponding to FIG. 6 of the procedure 2 showing a state in which the pre-tension (solid arrow in the figure) is applied by pulling inward, and FIG. 8 is a partially broken view corresponding to FIG. It is a front view. Pretensions that are opposite to each other and equal to each other are generated internally at the stigmas 12 and 13 (solid arrows in FIG. 7). The pretension is generated when the stigmas 11, 12 are pulled through the generating device 1 when the generating device 1 shortens the distance between the stigmas, and the sizes are naturally opposite to each other. It is. In addition, since only the capitals 11 and 12 are pulled inward from the vertical standing state, even if the elastic part 6 of the generator 1 is slightly extended as shown in FIG. 8 (FIGS. 5 and 8). ), Sufficient pretension can be generated at the stigmas 11,12. In the generator 1 of the present embodiment, it is possible to apply a pretension of about 5 t per 1 cm of extension of the elastic part 6 (jack in this example).

FIG. 9 shows the state of FIG. 7 in which the compression member 14, the left inclined tension member 15 and the right inclined tension member 16 are connected to each other, and
FIG. 7 is a front view corresponding to FIG. 6, showing the building structure 10 in the procedure 3 in which the generator 1 is removed by removing the generator 1. Generator 1
Is removed, the pretension remains in the inwardly deformed ramen structure (broken arrow in FIG. 9). This pretension not only reduces the capital stress, but also reduces the bending moment generated in the diagonal beam 17, making it possible to build a building structure with high structural strength when using the same steel material as before. In order to obtain the same structural strength as before, it is possible to reduce the standard of the steel material to be used.

As described above, according to the generator of the present invention,
For example, for a building structure with a mountain-shaped ramen structure, such as Japanese Patent Application No. 7-1119, a simple operation is performed on each of the adjacent capitals to oppose the stress due to the vertical load, and to the same pre- Tension can be generated, and this pretension reduces the capital stress and the bending moment of the diagonal beam, so that the structural strength of the building structure to be built can be increased or the standard of steel used can be reduced. It is. In particular, "reducing the standard of steel" mentioned in the latter directly leads to a reduction in material costs, and it is possible to construct a ramen-structured building having a larger space than before. In addition, although description with reference to the drawings is omitted, post-tension can be generated for an existing building structure in the same procedure as the above procedures 1 to 3 (see FIGS. 6, 7 and 9).

[0017]

According to the generator of the present invention, it is possible to generate, in a simple operation, opposite and equal tensions on adjacent stigmas, and a structure by generating the tension rather than an increase in cost associated with the operation. Since the cost reduction due to the improvement of the strength or the reduction of the standard of the steel material to be used is large, it is possible to reduce the construction cost of the building structure having a large space. This effect is large in the mountain-shaped ramen structure shown in the embodiment.

As for the generator, since it has a simple structure using ordinary materials, it can be manufactured at a low cost, and it is only necessary to separately prepare a pulling auxiliary material. It turns out that it is rich in versatility. By taking into account the effect of the tension generation in addition to the low cost and versatility, the cost-effectiveness of the generator of the present invention is extremely excellent.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a generator according to the present invention.

FIG. 2 is a perspective view corresponding to FIG. 1, in which only the left opposing body is taken out and represented by a solid line.

FIG. 3 is a plan view of the generator.

FIG. 4 is a plan view showing the assembling relationship of each opposing body with the suspension pedestal omitted in FIG. 3;

FIG. 5 is a partially cutaway front view of the generator.

FIG. 6 shows a procedure 1 for generating a pretension by the generator.
FIG.

FIG. 7 is a procedure 2 for generating pretension by the generator.
FIG.

FIG. 8 is a partially cutaway front view corresponding to FIG. 5, showing the generator in the state of FIG. 7;

FIG. 9 shows a procedure 3 for generating pretension by the generator.
FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Generator 3 Left opposing body 4 Right opposing body 6 Telescopic part 31 Latching part of left opposing body 32 Moving part of left opposing body 33 Sliding plate of left opposing body 34 Horizontal orbit of left opposing body 41 Hook of right opposing body Stop 42 Moving part of right opposing body 43 Sliding plate of right opposing body 44 Vertical trajectory of right opposing body

Claims (4)

(57) [Claims] 1. A track is provided between a hook portion for connecting an auxiliary tension member extending from each of adjacent column capitals of a ramen structure and a moving portion disposed at a distance from the hook portion by a predetermined distance. A tension generator in which a left symmetrical body and a right symmetrical body having a symmetric structure have their orbits penetrated by a moving part of the other party, and a telescopic part is erected between moving parts having a facing relationship. 2. The left opposing body and the right opposing body according to claim 1 each have an even number of tracks, and the respective tracks of the left opposing body or the right opposing body are equally arranged on both sides of the expansion and contraction part. In addition, a tension generator in which the arrangement directions of the orbits of the left opposing body and the right opposing body are in an orthogonal relationship. 3. A tension generator in which the expansion / contraction part according to claim 1 and a hooking part or a moving part of each of the left opposing body and the right opposing body are brought into sliding contact with a suspension base. 4. A symmetrically structured left-facing body in which a track is provided between the hooking part and the moving part, and each track is inserted into the moving part of the other party, and a telescopic part is provided between the moving parts. And a tension generator consisting of a right opposing body and a left stigma adjacent to the ramen structure, and a hook of the left opposing body, and a vicinity of the right stigma and the hook of the right opposing body, respectively. After connecting with the tension auxiliary material, extend the elastic part and move each hook part inward, complete the ramen structure with inward pretension applied near each capital, via the tension auxiliary material Finally, a tension generation method in which the tension generator is retracted to loosen the tension auxiliary material and the tension generator is removed.