JP6651147B1 - Carrying material - Google Patents

Abstract

An object of the present invention is to provide a load-bearing material having improved load-bearing performance using an inexpensive reinforcing material. A load-bearing material includes a hollow tubular body and a reinforcing material disposed outside the tubular body, and ends of the reinforcing material are respectively provided on upper and lower portions of an outer peripheral surface of the tubular body. The reinforcing member is fixed to the end bracket 21, and the reinforcing member is supported on the tube 20 via the intermediate bracket 22. 30 is configured to be able to follow the bending deformation of the tube 20. [Selection] Figure 2

Description

  The present invention relates to a load-bearing material excellent in bending performance that can be applied to a pillar of a protective fence, a pile structure, or an earthquake-resistant reinforcing material for building use.

As a load-bearing material that generates a bending moment due to a load, for example, a pillar of a protective fence can be cited.
Concrete retaining walls are used as one of the foundation structures that support the columns.
Although the top end width of the retaining wall is formed as narrow as possible because of the need to reduce the construction cost, it cannot be made smaller than the cross-sectional dimension of the pillar, and there is a limit to reducing the top end width of the retaining wall.
As a high-strength support column, a filled steel pipe with a composite structure in which steel pipe is filled with concrete, or an internal reinforced steel pipe in which an insertion reinforcing material such as a reinforcing bar, a steel rod, H steel, or a cylindrical body having a polygonal cross section is inserted into the steel pipe Are known (Patent Documents 1 to 4).

JP 2002-266321 A JP 2008-184822 A JP 2009-215773 A JP 2012-26206 A

Conventional load-bearing materials such as columns have the following problems.
<1> A conventional pillar made of a filled steel pipe or an internally reinforced steel pipe has a heavy weight and is difficult to carry and move or handle on site, and the cost is extremely high.
<2> In the case of the filled steel pipe, since the adhesion between the concrete and the steel pipe disappears when the column reaches the final state, the contribution of the concrete to the improvement in the strength of the steel pipe is extremely low.
<3> In the internal reinforcing steel pipe, only the interpolating reinforcing material is inserted into the steel pipe, and the interpolating reinforcing material and the steel pipe are not integrally formed over the entire length.
Therefore, the interpolating reinforcing material also has a low contribution to the improvement of the strength of the steel pipe.
<4> In order to integrally form the insertion reinforcing material with the steel pipe, it is necessary to fix the entire length of the steel pipe by welding or the like. The fixing cost is also high.
<5> For this reason, conventionally, only a certain range of both ends of the steel pipe and the insertion reinforcing material is partially fixed by welding or the like.
In a column in which only the insertion reinforcement is fixed to the vicinity of both ends of the steel pipe, a shear force in a portion where the insertion reinforcement cannot be fixed is borne only by the adhesion portions at both ends, so a large shear force is generated at the adhesion portions at both ends.
<6> With the conventional column reinforced inside the steel pipe as described above, the “Bernoulli-Euler theory” of direct strain does not hold.
Therefore, it is difficult to accurately calculate the proof strength of the column, and the reliability of the proof strength evaluation is low.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a load-bearing material having improved load-bearing performance using an inexpensive reinforcing material.

The present invention is a load-bearing material in which a bending moment is generated when an external force is applied, and a tensile region in which a tensile stress is generated along the length direction when an external force is applied, and a compression region in which a compressive stress is generated along the length direction when an external force is applied. A tubular body to be formed , comprising one or more reinforcing members disposed outside of the tubular body and parallel to the axis of the tubular body , between the reinforcing material and the outer peripheral surface of the tubular body when an external force is applied. while maintaining the spacing formed as a reinforcing member to follow the bending deformation of the tube, the tube end portion of the reinforcing material arranged on either one of the regions of the tension zones or compression region of the tube Were fixed to the outer peripheral surfaces of the respective members .
In another form of the present invention, it is attached to the reinforcing member in the tensile region and compression area of the tube.
In another embodiment of the present invention, the reinforcing material is attached to the entire length of the tubular body or to a part of the tubular body.
In another embodiment of the present invention, a plurality of intermediate brackets are protruded from the outer peripheral surface of the tubular body, and the reinforcing member is supported at a distance from the outer peripheral surface of the tubular body via the plurality of intermediate brackets.
In another embodiment of the present invention, the reinforcing member may be supported by being moored without being fixed to an intermediate bracket protruding from the outer peripheral surface of the tubular body, and between the both end portions of the reinforcing member. The tube may be rigidly supported by an intermediate bracket protruding from the outer peripheral surface of the tube.
In another aspect of the present invention, in a tension region of the tube, a reinforcing member is anchored and supported without being rigidly connected to an intermediate bracket projecting from an outer peripheral surface of the tube, and in a compression region of the tube, the tube is The reinforcing material is rigidly connected to and supported by the intermediate bracket protruding from the outer peripheral surface of the bracket.
In another embodiment of the present invention, the arrangement intervals of the intermediate brackets that support the tubular member between both ends of the reinforcing member may be different depending on the bending moment generated in the tubular body.
In another embodiment of the present invention, the rigid connection means of the reinforcing member is any one of a screwing means, a wedge fixing means, a pin fixing means, and a welding means.
In another embodiment of the present invention, the reinforcing material is any one of a rod, a pipe, a rope, and a belt.
In another embodiment of the present invention, the load-bearing material is applicable to a pillar of a protection fence, a pile structure, or an earthquake-resistant reinforcing material for building use.

The present invention has at least one of the following effects.
<1> The strength of the load-bearing material can be effectively increased only by installing an inexpensive reinforcing material on the pipe.
<2> With the conventional load-bearing material in which the inside of the tube is reinforced with an interpolating reinforcing material or concrete, the “principle of holding the plane” of the direct strain does not hold, but the reinforcing material is installed outside the tube via a bracket. In the load-bearing material according to the present invention, since the "principle of holding a plane" of the direct strain is established, the strength of the load-bearing material can be accurately calculated, and the reliability of the strength evaluation of the load-bearing material increases.
<3> The cross-sectional strength (second moment of area) of the tubular body can be increased by supporting the reinforcing material provided outside the tubular body at a distance from the tubular body, so that the tubular body can be reduced in diameter.
<4> Since the reinforcement is simply attached to the outside of the tube, the operation of attaching the reinforcement is simplified, and the load-bearing material can be manufactured economically.
<5> The load-bearing material is applicable to a pile structure or an earthquake-resistant reinforcing material for building use, in addition to the pillar of the protective fence, and is versatile.

FIG. 4 is a perspective view of the load-bearing material according to the first embodiment, from which an intermediate portion is omitted. Model diagram of load-bearing material with a part broken It is explanatory drawing of the positioning hole of an end part bracket or an intermediate bracket, (A) is explanatory drawing in case a positioning hole is a closing hole, (B) is explanatory drawing in case a positioning hole is an opening hole. Explanatory drawing of the reinforcement structure of the end bracket with a part omitted Model diagram of load-bearing material partially reinforced by attaching reinforcement to part of the tube Explanatory drawing of the arrangement position of the reinforcing material toward the circumferential direction of the pipe Illustration of the characteristics of load-carrying materials supported by a cantilever structure Illustration of characteristics of load-bearing material supported by beam structure Model diagram of a load-bearing material supported by a cantilever structure according to Example 2 in which a penetration portion between an intermediate bracket and a reinforcing material is rigidly connected. Model diagram of a load-bearing material supported by a beam structure according to Example 2 in which a penetrating portion between an intermediate bracket and a reinforcing material is rigidly connected. Model diagram of the load-bearing material according to the third embodiment in which the arrangement intervals of the intermediate brackets are changed. Model diagram of the load-bearing material according to the fourth embodiment in which the mounting position of the reinforcing material is different between the upper and lower portions of the tube. Model diagram of the load-bearing material according to the fifth embodiment in which two support forms of the reinforcing material by the intermediate bracket are combined.

  The present invention will be described with reference to the drawings.

[Example 1]
<1> Load-bearing material The load-bearing material 10 can be applied to columns (support terminals, intermediate columns) of protective fences for preventing falling objects such as falling rocks and landslides. It can also be applied to seismic reinforcement materials for applications.

<2> Outline of Load-bearing Material The load-bearing material 10 illustrated in FIGS. 1 and 2 will be described. And one or more reinforcing members 30 arranged in parallel.
In this example, both ends of the reinforcing member 30 are fixed to the outer peripheral surface of the tubular body 20 using the end bracket 21, and between the both ends (middle) of the reinforcing member 30 using the intermediate bracket 22. The form moored to the outer peripheral surface will be described.

<3> Tube The tube 20 is a hollow structure having a high bending rigidity and a circular, elliptical, or polygonal cross section.
When the load bearing material 10 is applied to a column, a commercially available steel pipe is suitable as the pipe 20.
The overall length and cross-sectional dimension of the tube 20 are appropriately selected in consideration of the use of the load-bearing material 10, the expected bending moment, the applied load, and the like.

  The tubular body 20 may be used in a hollow state, but may be filled with a concrete-based solidifying material inside like a conventional filled steel pipe.

<4> Reinforcing Material The reinforcing material 30 is a reinforcing member for increasing the sectional strength (sectional modulus, plastic sectional modulus, or shear strength) of the tube 20.
As the reinforcing material 30, a rod, a pipe, a rope, or a belt having high tensile strength or high compressive strength can be used, and the material is not limited to metal, but may be high-strength fiber or resin.
Practically, commercially available steel materials such as reinforcing bars, steel bars, and PC steel bars are suitable.

<5> Positioning Means of Reinforcing Material Both ends of the reinforcing material 30 are fixed to the outer peripheral surface of the tube 20 via the end bracket 21, and the both ends of the reinforcing material 30 are connected to the tube 20 via the intermediate bracket 22. The reinforcing member 30 is positioned by anchoring and supporting the outer peripheral surface.

<5.1> Bracket The end bracket 21 and the intermediate bracket 22 serve as a positioning function for positioning the reinforcing member 30 in parallel with the axis of the tubular body 20 and a spacer for keeping the distance S between the reinforcing member 30 and the tubular body 20 constant. Has both functions.

  The positioning means of the reinforcing member 30 illustrated in FIGS. 1 and 2 will be described. One or more intermediate brackets 22 protruding from the surface.

These brackets 21 and 22 are arranged at predetermined intervals along the axial direction of the tube 20, and the positioning holes 21a and 22a of the reinforcing member 30 provided in each bracket 21 and 22 are aligned on the same line. In.
The reinforcing member 30 can be positioned on the tube 20 through the positioning holes 21a and 22a of the brackets 21 and 22, respectively.

The positioning holes 21a and 22a may be closed holes such as circles as shown in FIG. 3A, or may be bent notched open holes as shown in FIG. 3B.
When the positioning holes 21a and 22a are closed holes, the reinforcing member 30 is inserted through one of the brackets 21 and 22 and installed. When the positioning holes 21a and 22a are open holes, the reinforcing member 30 is connected to each bracket. It inserts from the side of 21 and 22, and installs.

<5.2> Fixing the end of the reinforcing member The end of the reinforcing member 30 is fixed to the end bracket 21.
In this example, a form in which a screwing means using a nut 31 is applied as a means for fixing the end of the reinforcing material 30 is shown. However, the fixing means for the end of the reinforcing material 30 is a wedge in addition to the screwing means. Any one of a fixing means, a pin fixing means, a welding means and the like can be applied.
Since a large external force is applied to the end bracket 21 at the time of bending deformation of the load-bearing material 10, it is preferable to provide a reinforcing rib 23 between the end bracket 21 and the pipe body 20 as shown in FIG.

<5.3> Mooring between Both Ends of Reinforcement In this example, a mode in which the both ends of reinforcement 30 are moored without being fixed to intermediate bracket 22 will be described.
“Mooring” refers to a state in which only the displacement of the reinforcing member 30 in the radial direction of the tube body 20 is restricted.

<5.4> Reason for arranging the reinforcing member outside the tube The reason for arranging the reinforcing member 30 outside the tube 20 is to increase the sectional strength (section coefficient or plastic section coefficient) of the tube 20. This is to improve the workability of attaching the reinforcing member 30.
Even if the reinforcing material 30 has a small cross section, the cross-sectional strength of the tubular body 20 can be increased by attaching the reinforcing material 30 away from the outer peripheral surface of the tubular body 20.
The diameter of the tube 20 can be reduced by increasing the sectional strength of the tube 20.
Further, since the mounting operation of the reinforcing member 30 can be performed outside the tubular body 20, the mounting operation of the reinforcing member 30 is extremely improved.

<5.5> Reason for Supporting Reinforcement by Intermediate Bracket With a structure in which only both ends of the reinforcement 30 are fixed to the end bracket 21, the followability of the reinforcement 30 during bending deformation of the pipe 20 is improved. Thus, the reinforcing member 30 on the tension side comes into contact with the tubular body 20, and the reinforcing member 30 on the compression side hardly buckles.

Therefore, in order to improve the followability of the reinforcing member 30 with respect to the bending deformation of the tube 20, the reinforcing member 30 is supported by the intermediate bracket 22.
By supporting between the both ends of the reinforcing member 30 with the intermediate bracket 22, the reinforcing member 30 is bent while the space S formed between the reinforcing member 30 and the tube 20 is kept substantially constant. Deformation can be followed.
The followability of the reinforcing member 30 is improved in proportion to the interval between the intermediate brackets 22 (the number of the installed intermediate brackets 22), and the effect of suppressing the buckling of the reinforcing member 30 on the compression side is enhanced.

<5.6> Range of Reinforcement of Pipe by Reinforcement The range of reinforcement by the reinforcement 30 may be reinforced over the entire length of the tube 20, but a specific section of the tube 20 where a large bending moment occurs when an external force acts. May be partially reinforced.
FIG. 5 shows an example in which the reinforcing member 30 is attached to the central portion of the tubular body 20 to partially reinforce the tubular body 20. The partial reinforcing range is selected according to the bending moment generated in the tubular body 20.

<5.7> Arrangement Position of Reinforcement Material with respect to Pipe Body The arrangement position of the reinforcement material 30 when the pipe body 20 is viewed in a plan view is at least a pipe position so as to oppose a bending moment or the like generated in the tube body 20. It is sufficient that the reinforcing material 30 is provided in the tension region (tensile side) of the body 20.
The reinforcing material 30 disposed in the compression region (compression side) of the tube 20 functions as the bending deformation resistance of the tube 20 similarly to the tension region.

An arrangement position of the reinforcing member 30 along the circumferential direction of the tube 20 illustrated in FIG. 6 will be described.
X in the figure, Y represents the operating shaft of the bending moment against the load bearing material _10, F X, F _Y represents the bending resistance of the reinforcing member 30 located pull region.

  FIG. 6A shows a form in which the reinforcing member 30 is disposed at one position on the left side of the tube 20. The bending member of the tube 20 in the positive direction of the X axis has a reinforcing member in the tensile region. 30 resists.

  FIG. 6B shows a form in which the reinforcing members 30 are arranged at two positions on the left and right of the tube 20, and the bending moments of the tube 20 in the positive and negative directions of the X axis are respectively located in the tensile regions. The reinforced material 30 functions as a tensile resistance. The reinforcing member 30 located in the compression region functions as a compression resistance.

  FIG. 6C shows a form in which reinforcing members 30 are arranged at three positions on the left, right, and lower sides of the tube 20, and the tube 20 is oriented in three directions, ie, the positive and negative directions of the X axis and the positive direction of the Y axis. The stiffeners 30, each located in the tensile region, resist the bending moment.

  FIG. 6D shows a form in which reinforcing members 30 are arranged at four positions on the upper, lower, left, and right sides of the tube 20, and the tube 20 is directed in four directions of the positive and negative directions of the X axis and the positive and negative directions of the Y axis. The stiffeners 30, each located in the tensile region, resist the bending moment.

The disposition position of the reinforcing member 30 is not limited to the form illustrated in FIG. 6 and can be appropriately selected in consideration of a bending moment and the like.
When the reinforcing members 30 are arranged at regular intervals in the circumferential direction of the tube 20, for example, at 30 ° intervals or 45 ° intervals, the strength of the tube 20 is reduced. Can be bigger.

[How to assemble load-bearing materials]
A method of assembling the load-bearing material 10 illustrated in FIG. 1 will be described.

<1> Insertion of Reinforcing Material The reinforcing material 30 inserted from one end bracket 21 located on the same line is inserted into the other end bracket 21 via the intermediate bracket 22.

<2> Fixing Ends of Reinforcement Material Nuts 31 are tightened and fixed to the threaded portions of the reinforcement material 30 protruding from each end bracket 21 to the outside, thereby completing the assembly of the load-bearing material 10.
When fixing the end of the reinforcing member 30 to the pipe body 20, the reinforcing member 30 is fixed without tension, but may be fixed by applying an equal tension to each reinforcing member 30 in advance.

<3> Assembling place of load-bearing material The load-bearing material 10 may be transported to the site in a completed form in which the reinforcing material 30 is attached to the pipe 20 in a factory or the like beforehand. The reinforcing members 30 may be individually carried into the site, and the load bearing material 10 may be assembled at the site.
In the latter case, in which the constituent materials of the load-bearing material 10 are disassembled and transported to the site, the loadability of the load-bearing material 10 and the on-site handling are improved as compared with the former.
In particular, in the latter case, since the reinforcing member 30 can be attached to the pipe body 20 without welding, it is not necessary to bring welding equipment or power supply equipment to a site such as a mountain area.

[Characteristics of load bearing material]
The characteristics of the load bearing material 10 will be described with reference to FIGS.

1. When the load-bearing material is supported by the cantilever structure <1> Bending strength of the load-bearing material FIG. 7 shows a support form in which the lower part of the load-bearing material 10 is supported by the support structure 40 like a support fence post, and the cantilever structure is used. Is shown.
When a load acts on the load-bearing material 10 from right to left, a bending moment M is generated in the load-bearing material 10. With respect to the bending moment M, not only the reinforcing member 30a in the tension region functions as a bending resistance member of the tube 20, but also the reinforcing member 30b in the compression region functions as a bending resistance member of the tube 20.
That is, an equal tension is generated over the entire length of the reinforcing member 30a in the tension region, and the equal tension generated in the reinforcing member 30a is transmitted to the upper and lower portions of the tubular body 20, respectively, and is extended over the reinforcing section of the tubular body 20. And uniform tensile and compressive forces are transmitted.
Therefore, even if the bending moment M of the load-bearing material 10 reaches the bending strength of the tube body 20 alone, no bending occurs in the load-bearing material 10, and the bending moment M is supported by the support structure 40 through the load-bearing material 10.
As described above, by attaching the reinforcing members 30a and 30b to the periphery of the tubular body 20, the maximum bending strength of the tubular body 20 is remarkably improved.

<2> Bending strength of load-bearing material during deformation When the bending moment M exceeds the bending stiffness of load-bearing material 10, reinforcing members 30 a and 30 b in the tensile region and the compression region follow the bending deformation of tube 20.
During deformation of the load bearing material 10, the spacer function of the intermediate bracket 22, the tensile region and a reinforcing member 30a of the compression region, along with spacing _S 1, _{S 2} and 30b and the tube 20 is maintained substantially constant, the tube The reinforcing members 30a and 30b provided on the member 20 continue to function as resistance members.
Therefore, even if the tube 20 reaches the limit of the bending strength with the deformation, an increase in the strength can be expected, and the good bending strength can be maintained even during the deformation of the load-bearing material 10.

<3> Buckling of Reinforcement Since no compressive force is generated in the tension region of the tube body 20, no buckling occurs in the reinforcement 30b provided in the tension region.
By appropriately setting the arrangement intervals of the intermediate brackets 22 according to the cross-sectional diameters of the reinforcing members 30a and 30b, the reinforcing member 30b provided in the compression region is less likely to buckle.

2. When the load-bearing material is supported by a beam structure <1> Bending strength of the load-bearing material FIG. 8 shows a supporting form in which a beam structure in which both ends of the load-bearing material 10 are supported like a seismic reinforcement material for building use.
Even when a downward load F is applied to the center of the horizontal load-bearing material 10, the reinforcing member 30a provided in the tension region functions as a bending resistance member of the tube 20, similarly to the form supported by the cantilever structure, Since the reinforcing member 30b provided in the compression region functions as a bending resistance member of the tube 20, the maximum bending strength of the tube 20 is significantly improved.

<2> followed even during the deformation of the load bearing material bending strength tube 20 during deformation, reinforcement 30a of the tension zones and the compression region, while 30b is keeping the spacing S _1, S ₂ of the tube 20 substantially constant Therefore, good bending strength can be maintained even during the deformation of the load-bearing material 10.

[Example 2]
Hereinafter, other embodiments will be described. In the description, the same portions as those in the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

<1> Other load-bearing materials With reference to FIGS. 9A and 9B, another load-bearing material 10 in which the penetrating portion between the intermediate bracket 22 and the reinforcing material 30 is rigidly connected by a nut 31 or welding or the like will be described.
FIG. 9A shows a support form having a cantilever structure that supports the lower portion of the load-bearing material 10, and FIG. 9B shows a support form having a beam structure that supports both ends of the load-bearing material 10.

The load-bearing material 10 of the present example may include a tube 20 which is a load-bearing material main body, and one or more reinforcing members 30 disposed outside the tube 20 and parallel to the axis of the tube 20. This is the same as in the first embodiment.
In this example, not only is the rigid portion between the end portion of the reinforcing member 30 and the end bracket 21, but also the rigid portion between the both end portions of the reinforcing member 30 and the intermediate portion 22.

<2> Effects of the load-bearing material of this example In this example, the following specific effects are obtained in addition to the effects described above.
In this example, not only the ends of the reinforcing member 30 but also both ends of the reinforcing member 30 are rigidly connected to the tubular body 20 via the intermediate bracket 22, so that both ends of the reinforcing member 30 a located in the tensile region are not formed. For example, a tensile resistance is generated for each span of the intermediate bracket 22, and a compression resistance is generated for each span of the intermediate bracket 22 between both ends of the reinforcing member 30b located in the compression area.
Since the reinforcing members 30a and 30b are rigidly connected to the intermediate bracket 22, the reinforcing member 30b located in the compression region of the tubular body 20 functions similarly to the reinforcing member 30a located in the tension region.
Thus, in this example, the axial forces of the reinforcing members 30a and 30b are not averaged over the entire length.

For this reason, as shown in FIG. 9A, when the load-bearing material 10 is used as a support for a cantilevered protective fence, the cross-sectional strength of the support (without increasing the diameter of the tube 20 or increasing the thickness of the tube) is used. Section modulus) can be increased.
In particular, when the load bearing material 10 is applied to the terminal support, the terminal anchor supporting the terminal support via the stay rope can be omitted.

The operation and effect of the load-bearing material 10 supported in the form of a beam structure will be described with reference to FIG. 9B.
When a load F is applied to the center of the span of the load-bearing material 10, a tensile resistance is generated in the span unit of the intermediate bracket 22 between both ends of the reinforcing member 30a located in the tensile region, and the reinforcing member 30b located in the compressing region. A compression resistance is generated between the two ends in units of the span of the intermediate bracket 22.
Even when the load-bearing material 10 is used in the form of a beam structure, the reinforcing material 30b located in the compression region of the pipe 20 exhibits the same reinforcing function as the reinforcing material 30a located in the tension region.
Therefore, also in the present embodiment, the reinforcing members 30a and 30b in the tension region and the compression region follow and deform while keeping the distances S ₁ and S ₂ between the tube 20 substantially constant. Also maintains good bending strength.

<3>"Principle of plane retention" of direct strain
In this embodiment in which the reinforcing member 30 and the intermediate bracket 22 are rigidly connected, the load-bearing material 10 is supported by a cantilever structure, and even if a large sectional force is generated at the lower end of the load-bearing material 10, both ends of the load-bearing material 10 Since the reinforcing members 30a and 30b located therebetween transmit the sectional force to each other, the "principle of holding a plane" of the direct strain is established.
Even in a form in which the load bearing material 10 is supported by a beam structure, the “principle of holding a plane” of direct strain is established.
Therefore, the proof stress of the load-bearing material 10 can be accurately calculated, and the reliability of the proof stress evaluation of the load-bearing material 10 increases.
In the present embodiment, the reliability of the load-bearing material 10 for the proof stress evaluation is higher than in the first embodiment.

[Example 3]
<1> Other Load-bearing Materials With reference to FIG. 10, another load-bearing material 10 in which the arrangement intervals of the intermediate brackets 22 are changed so as to be different in the reinforcing section by the reinforcing material 30 will be described.

The bending stress of the load-bearing material 10 under the action of an external force is not uniform over its entire length, and the supporting form (cantilever structure or beam structure) of the load-bearing material 10 causes a large or small bending stress along the length direction of the load-bearing material 10. There is a difference.
Therefore, in a section where a large bending stress is expected to occur, the arrangement interval of the intermediate bracket 22 is narrowed.

In the load-bearing material 10 illustrated in FIG. 10, since a large bending stress is generated at the center of the tube 20, the arrangement intervals P _{3 to} P ₅ of the intermediate brackets 22 at the center of the tube 20 are reduced, and the bending stress is reduced. There are widening the arrangement interval P _1, P ₈ of the intermediate bracket 22 in the upper and lower portions of the small tube 20.

<2> Functions and Effects of the Load Bearing Material of the Present Example In addition to the functions and effects described above, in this example, the interval between the intermediate brackets 22 is changed according to the magnitude of the generated stress, and the section of the section that requires reinforcement of the tube 20 is required. By rigidly connecting the intermediate bracket 22 and the reinforcing member 30, the reinforcing member can be effectively reinforced.

[Example 4]
<1> Other Load-bearing Materials Referring to FIG. 11, when the tensile region of the tube 20 is different along the length of the tube 20, the mounting position of the reinforcing member 30 is different between the upper and lower portions of the tube 20. The other load bearing material 10 will be described.
In this example, when the tensile region is different between the upper half and the lower half of the tube 20, the reinforcing material 30 is attached to each tensile region and individually reinforced.
FIG. 11 illustrates a case where a tensile region is formed in the upper right half and the lower left half of the tubular body 20, and reinforcing materials 30a, 30a are provided in the upper right half and the lower left half of the tubular body 20, respectively. Installed and reinforced individually.

<2> Action and Effect of the Load Bearing Material of the Present Example The present example is suitable for reinforcement in a case where the tensile regions of the tube 20 are different along the length direction of the tube 20.
For example, when the load-bearing material 10 is applied to a pillar of a protective fence embedded in the ground on a slope, a tension region occurs on the slope mountain side on the ground portion of the pillar, and the tensile region is pulled toward the valley side in a ground portion below a certain section from the ground surface. Since an area is generated, optimal reinforcement of the column is possible.

[Example 5]
<1> Other Load-bearing Materials In the above embodiments, two forms of supporting the reinforcing member 30 by the intermediate bracket 22 are described: a form in which the reinforcing member 30 is moored without being rigidly connected, and a form in which the reinforcing member 30 is rigidly supported. did.

With reference to FIG. 12, another load-bearing material 10 combining these two support forms will be described.
In the tension region of the tube 20, the intermediate member 22 is supported by the intermediate bracket 22 in a form in which the reinforcing member 30a is moored without being rigidly connected. In the compression region of the tube 20, the intermediate member 22 is rigidly connected to the reinforcing member 30b. To support.

<2> Effects of the load-bearing material of this example In this example, in addition to the effects described above, the support form of the reinforcing members 30a and 30b is selectively used in accordance with the tension region and the compression region of the pipe 20, which is economical. And the pipe body 20 can be rationally reinforced. In particular, the buckling suppression effect of the reinforcing member 30b is increased in the compression region of the tube 20.

10 Load-bearing material 20 Tube 21 End bracket 22 Intermediate bracket 30 Reinforcement member 31 Nut 40 Supporting structure

Claims (11)

A load-bearing material that generates a bending moment when an external force acts ,
A tube in which a tensile region where a tensile stress occurs along the length direction when an external force is applied, and a compression region where a compressive stress is generated along the length direction when an external force is applied,
One or more reinforcing members disposed outside the tube body and in one of the tension region and the compression region of the tube body in parallel with the axis of the tube body,
Fixing the end of the reinforcing material to the outer peripheral surface of the tubular body ,
Protruding one or more intermediate brackets on the outer peripheral surface of the tube,
While maintaining the space formed between the reinforcing member and the outer peripheral surface of the tube when an external force is applied, the reinforcing member follows the bending deformation of the tube between the ends of the reinforcing member via the intermediate bracket. Characterized by being supported by a tubular body ,
Carrying material. Characterized in that fitted with the reinforcing member in the tension zones and compression area of the tube, load bearing material of claim 1.   The load-bearing material according to claim 1, wherein the reinforcing material is attached to the entire length of the tubular body or to a part of the tubular body. The load-bearing material according to any one of claims 1 to 3, wherein a reinforcing material is supported at a distance from an outer peripheral surface of the tubular body via the intermediate bracket. The load-bearing material according to any one of claims 1 to 4, wherein the reinforcing member is supported by being anchored without being fixed to an intermediate bracket projecting from an outer peripheral surface of the tubular body. . The load-carrying material according to any one of claims 1 to 4, wherein a portion between both ends of the reinforcing member is rigidly supported by an intermediate bracket protruding from an outer peripheral surface of the tubular body. In the tension region of the tube, the reinforcing material is moored and supported without being rigidly connected to the intermediate bracket projecting from the outer surface of the tube, and in the compression region of the tube, the intermediate member protrudes from the outer surface of the tube. The load-bearing material according to any one of claims 1 to 4, wherein a reinforcing material is rigidly supported on the bracket and supported. The load bearing according to any one of claims 1 to 7, wherein an arrangement interval of the intermediate brackets that supports the reinforcing member between both ends thereof is different depending on a bending moment generated in the tubular body. Wood.   The load-bearing material according to claim 6, wherein the stiffening unit of the reinforcing member is any one of a screwing unit, a wedge unit, a pin unit, and a welding unit.   The load-bearing material according to any one of claims 1 to 9, wherein the reinforcing material is any one of a rod, a pipe, a rope, and a belt.   The load-bearing material according to any one of claims 1 to 10, wherein the load-bearing material is a pillar of a protective fence, a pile structure, or an earthquake-resistant reinforcing material for building use.

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