JP6703392B2 - Seismic control clamps and temporary structures - Google Patents

Description

The present invention relates to a clamp used when assembling a temporary structure by connecting single pipes and the like, and particularly to a seismic control suitable for assembling an independent large-scale temporary structure such as a large-scale temporary competition facility. The present invention relates to a clamp and a temporary structure equipped with this seismic control clamp.

In recent years, due to the fact that it is temporarily installed for a short period of time, and for the purpose of facilitating new construction, reduction, and dismantling, large-scale construction using temporary members such as building frames that have been used in the past Several temporary structures (for example, refer to Patent Document 1) and temporary sports facilities in a large space have been proposed and constructed. Famous ones are temporary stadiums such as the hockey stadium used in the 2012 London Olympics.

Up to now, temporary structures assembled using temporary members have been assembled around buildings and the like. Such a temporary structure is not so large in scale, and is connected to the building by a member such as a wall connection to prevent the structure from falling due to an earthquake load. However, when a large-scale temporary structure is used by itself, there is no connection with a building, so seismic safety against earthquakes becomes a problem.

When constructing a large-scale temporary structure using a frame scaffold, the basic configuration of the members is as shown in FIG. That is, the frame scaffolding is a floorboard 2 that is installed between the upper portions of two gate-shaped building frames 1, and a pair of X-shaped cross braces 3 (for example, φ21.7 mm) installed between the side portions of the two building frames 1. X 1.9 mm), X-shaped single tube braces 4 and 5 (for example, φ48.6 mm × 2.4 mm) that reinforce the cross braces 3, and horizontal single tubes 6 and 7 for horizontal connection (for example, φ48.6 mm). X 2.4 mm). The single tube braces 4 and 5 are braces obliquely arranged in the XZ plane, and are arranged inside and outside in the Y direction, respectively. Further, the horizontal single pipe 6 functions as an X-direction connecting member, and the horizontal single pipe 7 functions as a Y-direction connecting member. The lower end of the building frame 1 is engaged with the jack base 8. The dimensions of the frame scaffold are, for example, width W=900 mm, length L=1800 mm, and height H=1700 mm. As shown in FIG. 15, at the intersections of each single pipe and the building frame, and at the intersections of the single pipe and the single pipe, they are tightly connected to each other by using a fastening metal fitting called a clamp (for example, refer to Patent Documents 2 and 3).

It is well known that the clamp has a structure in which two clamp bodies each including a fixing piece, a holding piece, and a bolt and a nut for fastening them are connected. As the type of this clamp, as shown in FIG. 16(1), an orthogonal type clamp in which the crossing angles of the pipes held by the two clamp bodies are fixed at a right angle, or as shown in FIG. There is a universal clamp that can freely adjust the crossing angle of pipes held by two clamp bodies. In such a clamp, a tightening force (torque) of 3.5 kN·cm is required to secure the effect of tight binding.

JP, 10-184050, A JP, 2007-277963, A Japanese Utility Model Publication No. 4-62847

By the way, in the above-mentioned basic structure of the frame scaffold, when a horizontal force such as an earthquake force is applied, the cross force and the single pipe brace resist the earthquake force. In the cross bracing, when the horizontal force is applied, the compression side member buckles, and the tension side member resists, resulting in a slip-type load-deformation relationship. Further, since the pin joint portion at the cross bracing end portion cannot retain the proof stress relatively early, energy absorption cannot be expected. On the other hand, in the single pipe brace, both the tension side and the compression side members resist, so that the load-deformation relationship is stable. In addition, when the present inventor examined the energy absorption of the frame scaffold (1 described later), it was found that the frictional force is generated by the relative displacement between the single-tube brace and the clamp, so that the energy absorption can be expected. .. In addition, when the present inventor examined the presence or absence of energy absorption between the single pipe and the clamp (2, which will be described later), it was found that the seismic performance of the temporary structure as a whole was significantly different due to the difference in the energy absorption amount.
Next, the above-mentioned examination contents and results will be described.

(1) Examination of energy absorption of frame scaffolding This examination is aimed at confirming the effect of the single pipe brace which is a damping member and cross braces, and consists of a frame structure with four single pipe braces and four cross braces. The test body A (see FIG. 17) and the test body B (see FIG. 18) having a frame structure having four cross braces are subjected to repeated positive and negative loading experiments at the floorboard position. The frame structure has a width W of 900 mm, a length L of 1800 mm, and a height H of 1700 mm. The test body A corresponds to the configuration of FIG. Experimental results are shown in FIG. As shown in this figure, in the test piece A, that is, the frame scaffold which has been frequently used, the energy absorption performance is mainly due to the single tube brace, and the energy absorption is mainly due to friction between the single tube and the clamp. It turns out that it depends.

(2) Examination of the presence or absence of energy absorption between the single pipe and the clamp As shown in FIG. 20(1) and FIG. 20(2), a large-scale temporary structure consisting of a large number of frame scaffolds was analyzed, and FIG. An analytical model as shown in Figure 3 was created. Then, the response when a seismic wave was applied to this analytical model was obtained by numerical analysis, and the difference in response between the single pipe and the clamp depending on the presence or absence of energy absorption was investigated. As the analysis seismic wave, El Centro wave 1940 NS (maximum acceleration 342 cm/sec ² ) was used, and the vibration direction was the X direction. The analysis result is shown in FIG. As shown in this figure, it can be seen that the presence or absence of energy absorption between the single pipe and the clamp has a great influence on the response acceleration and the response displacement generated in the large-scale temporary structure.

In consideration of the above-mentioned examination results of (1) and (2), when the energy absorption due to the friction between the single tube brace and the clamp is positively utilized, there are the following problems.

First, between the single pipe and the clamp, as shown in FIG. 22, there is contact only in a specific narrow area, and there is a very high surface pressure (50 MPa or more). Here, FIG. 22(1) is a photograph of the situation of the pressure sensitive paper test of the single tube and the clamp (the clamping force (torque) of the clamp is 3.5 kN·cm), (2) is the inner surface of the clamp, and (3) ) And (4) are distribution ranges (left side) and (right side) of pressure developed with the pressure sensitive paper removed.

Therefore, when shaking occurs due to an earthquake, the clamp and the plating on the surface of the single pipe may be worn and damaged at these contact points, and durability may be impaired. In addition, repeated earthquakes may lead to cross-section loss and loosen contact points, making it impossible to secure a predetermined tightening torque, which may reduce seismic energy absorption performance. There is also a problem that the number of contact points is small and the amount of energy absorbed by the earthquake is small.

Therefore, there has been a demand for the development of a clamp that can improve the energy absorption performance more than before without damaging the surface of the single tube.

The present invention has been made in view of the above, and an object thereof is to provide a vibration control clamp and a temporary structure that can improve energy absorption performance.

In order to solve the above-mentioned problems and to achieve the object, a vibration-damping clamp according to the present invention is configured by connecting two clamp bodies each having a holding portion that holds a rod-shaped temporary member, and absorbs vibration energy. A vibration damping clamp having a vibration damping function, characterized in that an energy attenuating portion is provided at a portion of one of the clamp bodies that comes into contact with the temporary member.

Further, another vibration damping clamp according to the present invention is characterized in that, in the above-mentioned invention, the energy attenuating portion is made of a friction material softer than the temporary member and capable of shearing deformation.

Further, another seismic control clamp according to the present invention, in the above-mentioned invention, holds the temporarily arranged temporary member by the clamp main body not provided with the energy attenuating portion, while diagonally holding the horizontal direction. It is characterized in that the arranged temporary member is held by the clamp body provided with the energy attenuating portion.

Further, the temporary structure according to the present invention is a temporary structure that can be assembled and disassembled as a temporary structure, and is characterized by including the above-described vibration damping clamp and the temporary member.

Further, another temporary structure according to the present invention is, in the above-described invention, two crossing frames, a floorboard installed between the building frames, and a cross that is installed in an X shape between the side portions of the building frame. Frame scaffolding having braces, single tube braces installed in an X-shape to reinforce the cross braces, horizontal single tubes installed horizontally between the ends of the single tube braces, and the seismic control clamps A plurality of the vibration damping clamps, wherein the seismic control clamp holds the single pipe brace with the clamp body provided with the energy attenuating portion, while the horizontal single pipe is provided with the clamp body without the energy attenuating portion. Alternatively, the building frame is held.

According to the seismic control clamp of the present invention, it is a seismic control clamp having a seismic control function of absorbing seismic energy, which is configured by connecting two clamp bodies each having a holding portion for holding a rod-shaped temporary member. Since the energy attenuating portion is provided at the portion of the holding portion of one of the clamp bodies that comes into contact with the temporary member, the vibration energy acting on the temporary structure including the temporary member and the vibration control clamp is It is attenuated by the energy attenuator of the clamp body. Therefore, there is an effect that the energy absorption performance of the clamp can be improved as compared with the related art. Further, it is possible to prevent the axial force of both temporary members held by the two clamp bodies from reaching the buckling load.

Further, according to another vibration damping clamp of the present invention, since the energy attenuating portion is made of a friction material that is softer than the temporary member and is shear-deformable, the tightening force from the clamp body is greater than that of the temporary member. It is transmitted to the temporary member through the soft friction material. Therefore, the surface pressure can be dispersed. Further, since the holding portion and the surface of the temporary member are in contact with each other through this friction material, no wear damage occurs and a predetermined seismic resistance function can be continuously ensured. Further, since energy attenuation due to shear deformation of the friction material can be expected, the effect of increasing the vibration energy absorption is also obtained.

Further, according to another vibration damping clamp of the present invention, while the horizontally arranged temporary member is held by the clamp body not provided with the energy attenuating portion, it is arranged obliquely with respect to the horizontal. Since the temporary member is configured to be held by the clamp body provided with the energy attenuating portion, for example, the energy absorption performance between the single tube brace obliquely arranged with respect to the horizontal and the clamp body. The effect of being able to improve.

Further, according to the temporary structure according to the present invention, the temporary structure is a temporary structure that can be assembled and disassembled as a temporary structure, and includes the above-described vibration-damping clamp and the temporary member, thus improving the seismic performance of the temporary structure. There is an effect that can be done.

Further, according to another temporary structure according to the present invention, two building frames, a floorboard installed between the building frames, and a cross braces installed in an X shape between the side portions of the building frame, A plurality of frame scaffolds each having a single tube brace installed in an X shape for reinforcing the cross braces, a horizontal single tube horizontally installed between the ends of the single tube brace, and the vibration control clamp. The seismic control clamp holds the single tube brace with the clamp body provided with the energy attenuating portion, while the clamp body without the energy attenuating portion holds the horizontal single tube or the building. Since the frame is held, there is an effect that a large-scale temporary structure with improved seismic performance can be realized.

FIG. 1 is a diagram showing an embodiment of a vibration control clamp according to the present invention. FIG. 2 is a diagram showing an example of a holding portion of the vibration control clamp according to the present invention. FIG. 3 is a diagram showing another example of the holding portion of the vibration control clamp according to the present invention. FIG. 4 is a diagram showing another example of the holding portion of the vibration control clamp according to the present invention. FIG. 5 is an image view of force transmission between the vibration control clamp and the single pipe according to the present invention. FIG. 6 is a front view showing the overall outline of the test body. FIG. 7 is a detailed view of the test body, (1) is a sectional view taken along line AA of the member A, (2) is a front view of the member A, (3) is a sectional view taken along line BB of the member B, (4) ) Is a front view of the member B. FIG. 8 is a photograph showing the appearance of the test body. FIG. 9 is a diagram showing strain measurement positions, (1) is a plan view, and (2) is a front view. FIG. 10 is a diagram showing displacement measurement positions, (1) is a plan view, (2) is a front view, and (3) is a sectional view taken along line AA. FIG. 11 is a load-displacement relationship diagram showing the difference in energy absorption depending on the presence or absence of a friction material. FIG. 12 is a diagram showing an example of installation locations of the vibration control clamps on the frame scaffold, (1) is a plan view, (2) is a front view, and (3) is a side view. FIG. 13 is a diagram comparing the equivalent stiffnesses of the present invention and the prior art. FIG. 14: is a block diagram of the conventional frame scaffold, (1) is a top view, (2) is a front view, (3) is a side view. FIG. 15: is a photograph figure of the clamp which has connected between the single pipes in the conventional frame scaffold. FIG. 16 is a photograph showing an example of a conventional clamp, (1) is an orthogonal type clamp, and (2) is a free type clamp. FIG. 17 is a diagram of the test body A (single tube brace+cross braces), (1) is a plan view, (2) is a front view, and (3) is a side view. FIG. 18 is a diagram of the test body B (only cross braces), (1) is a plan view, (2) is a front view, and (3) is a side view. FIG. 19 is a load-displacement relationship diagram for the test bodies A and B. FIG. 20 is a diagram showing an example of a large-scale temporary structure, (1) is a front view of an analysis target, (2) a side view of the analysis target, and (3) is an analysis model diagram. FIG. 21 is a diagram showing analysis results. (1) is the response acceleration at the A4 position, (2) is the response acceleration at the A3 position, (3) is the response acceleration at the A2 position, and (4) is the response at the A1 position. Acceleration, (5) is the response displacement at the DX position. FIG. 22 is a diagram showing a pressure sensitive paper test of a single tube and a clamp, (1) is a photograph of the test situation, (2) is a photograph of the inner surface of the clamp, and (3) and (4) are developed with the pressure sensitive paper removed. The pressure distribution ranges (left side) and (right side).

Embodiments of a vibration control clamp and a temporary structure according to the present invention will be described below in detail with reference to the drawings. The present invention is not limited to this embodiment.

[Vibration control clamp]
First, an embodiment of the vibration control clamp according to the present invention will be described.
As shown in FIG. 1, a seismic control clamp 10 according to an embodiment of the present invention includes a holding portion 16 that holds a steel single pipe P (a rod-shaped temporary member) between a fixed piece 12 and a holding piece 14. It is a free-standing clamp that is configured by symmetrically connecting two clamp main bodies 18 having a connecting portion 20 and has a vibration control function of absorbing vibration energy.

The connecting portion 20 is configured such that the fixing pieces 12 of the two clamp bodies 18 are axially attached to each other and are rotatable. The fixed piece 12 is formed in a curved shape along the outer peripheral surface of the single pipe P, and a bolt 24 for holding the single pipe is rotatably provided at a tip end portion thereof via a hinge portion 22. A nut 26 is screwed onto the bolt 24.

A holding piece 14 is pivotally attached to the base end of the fixed piece 12 via a hinge portion 28 so as to be openable and closable. The holding piece 14 is formed in a curved shape along the outer peripheral surface of the single pipe P, and a holding portion 30 that is cut out for holding the bolt 24 is formed at the tip end portion.

The clamp body 18 closes the holding piece 14 to hold the single pipe P in the holding portion 16, holds the bolt 24 in the holding portion 30, and then tightens the nut 26 in the bolt 24 to tighten the single pipe P in the holding portion 16. Can be held in a fixed state.

In the present embodiment, the friction material 32 as an energy attenuating portion is provided in the portion of the holding portion 16 of the one clamp body 18 that contacts the single pipe P. In the example of FIG. 1, the case where the friction material 32 is provided on the inner surface of the holding portion 16 of the left clamp body 18 is illustrated.

The friction material 32 has a high friction resistance against a metal such as a steel single pipe P, does not easily break or break even when subjected to repeated loads, and has high shear deformation performance and damping performance. It is preferable to be composed of a flexible material having Silicon rubber is an example of such a material. The thickness of the friction material 32 can be, for example, about 1 to 2 mm.

2 and 3 show examples of arrangement of the friction material 32.
As shown in FIG. 2, the friction material 32 may be attached and installed on the surface of the abdomen 34 where the contact area between the clamp body 18 and the single pipe P is the largest. Here, the abdomen 34 is a portion protruding from the center of the inner surface of the holding piece 14 in a pedestal shape, and corresponds to the square portion shown by the dotted line in FIG. 22(2). Since the friction material 32 has flexibility, it can be attached according to the shapes of the clamp body 18 and the single pipe P. Further, in the case of obtaining the above-described configuration, since it is sufficient to simply attach the friction material 32 to the clamp body 18, the temporary installation including the vibration damping clamp 10 and the single pipe P can be performed in substantially the same time and time as the conventional method. Can construct structures.

Further, as shown in FIG. 3, the friction material 32 may be installed by being attached to almost half of the portion where the clamp body 18 and the single pipe P contact each other.

Instead of using the friction material 32 as the energy attenuator, the energy attenuator may be configured by providing a plurality of small projections 36 on the abdomen 34 of the clamp body 18 as shown in FIG. As a result, the contact area between the clamp body 18 and the single pipe P is increased, the surface pressure that tends to be high can be relieved, and the vibration energy absorption performance can be increased.

As described above, according to the vibration damping clamp 10 according to the present embodiment, the vibration energy acting on the temporary structure including the single pipe P and the vibration damping clamp 10 is similar to that of the friction material 32 of the one clamp body 18. It is attenuated by the energy attenuator. Therefore, the energy absorption performance of the clamp can be improved as compared with the related art. Further, it is possible to prevent the axial force of both single pipes P held by the two clamp bodies 18 from reaching the buckling load.

Further, the tightening force from the clamp body 18 is transmitted to the single pipe P through the friction material 32 that is softer than the single pipe P. Therefore, the surface pressure can be dispersed. Further, the required tightening force is the same as when the friction material 32 is not provided. Further, since the holding portion 16 and the surface of the single pipe P are in contact with each other through the friction material 32, no wear damage occurs and a predetermined seismic resistance function can be continuously ensured.

Further, as shown in FIG. 5, in addition to frictional resistance between the clamp body 18 and the single pipe P, energy attenuation due to shear deformation of the friction material 32 can be expected, and the contact area between the clamp body 18 and the single pipe P increases. Therefore, the absorption power of the vibration energy also becomes large. Therefore, it is possible to improve the seismic performance of the temporary structure in which the vibration control clamp 10 and the single pipe P are combined.

In the above-described embodiment, when constructing a large-scale temporary structure in which a large number of frame scaffolds as shown in FIG. 14 are combined, the horizontal single pipes 6 and 7 are formed by the clamp body 18 in which the friction material 32 is not provided. On the other hand, the single tube braces 4 and 5 are preferably held by the clamp body 18 provided with the friction material 32. By doing so, the energy absorption performance between the single tube braces 4, 5 and the clamp body 18 can be improved, and the seismic performance of a large-scale temporary structure that uses many clamps can be greatly improved. it can.

[Verification of Effect of the Present Invention]
Next, an experiment conducted to verify the effect of the present invention will be described with reference to FIGS. 6 to 13.

In this experiment, for the purpose of confirming the energy damping performance of the above-mentioned vibration control clamp 10, a repeated load experiment was performed on a test body simulating a clamp that connects single pipes. For comparison, this experiment was carried out on a test body using the vibration damping clamp of the present invention having a friction material (silicon rubber) on one side and a test body using a conventional clamp having no friction material.

As shown in FIGS. 6 and 7, the test body is composed of an upper member B and a lower member A. The member B is formed by welding two single pipes (φ48.6 mm×2.4 mm) to a steel plate (PL32) by welding. The member A is formed by connecting two clamp bodies (for φ48.6) to a steel plate (PL32) by welding. As shown in FIG. 8, positive and negative repeated loading (10 times) was performed on this test body, and the strain and displacement at each location were measured. As the load, the load of the load cell was recorded.

FIG. 9 shows the strain measurement position. As shown in this figure, uniaxial strain gauges are installed on the front and back of the single pipe to measure the strain at this position. FIG. 10 shows the displacement measurement position. As shown in this figure, X, Y, and Z direction displacements (X1, Y1, Z1, etc.) are measured at various places. The displacement of the horizontal axis corresponding to the relative displacement amount of the single pipe and the clamp was determined by the calculation formula of the displacement of the horizontal axis=(Z5+Z6)/2-(Z3+Z4)/2.

FIG. 11 shows a load-displacement relationship diagram showing the difference in energy absorption obtained by the experiment, with and without the friction material. As shown in this figure, the initial rigidity is almost the same with and without the friction material. Further, it can be seen that when the clamp includes the friction material, one clamp can absorb almost three times as much energy as when the clamp does not include the friction material. Therefore, if a large number of clamps including friction materials are used for the entire temporary structure, it is considered that the effect of energy attenuation becomes greater.

FIG. 12 shows an example of the installation location of the vibration control clamps on the frame scaffold. As shown in this figure, when the single tube braces 4, 5 and the horizontal single tubes 6, 7 are connected at both ends of the single tube braces 4, 5 via the vibration control clamps 10, the single tube braces 4, 5 side The clamp body 18 including the friction material 32 is attached to the. In this case, the building frame side is not used.

When connecting the single pipe braces 4 and 5 to the building frame 1, the clamp body 18 including the friction material 32 is attached to the single pipe braces 4 and 5 side. In this case, the horizontal single pipes 6 and 7 are not used.

In this way, one clamp main body 18 including the friction material 32 is mounted on the single pipe braces 4, 5, and the other clamp main body 18 is mounted on the horizontal single pipes 6, 7 or the building frame 1 and securely fastened. To do it. In this way, the vibration damping effect of the friction material 32 can be easily exhibited.

As is well known, a clamp in which the holding portion 16 is provided with a non-slip material such as rubber is generally well known. By providing the non-slip material, rattling at the time of attaching the single pipe to the holding portion 16 can be reduced, but on the other hand, there is a possibility that the vibration energy absorbing performance is deteriorated due to the reduction of rattling. In addition, when a non-slip material is provided in the clamp that connects the ends of the single pipes, the rigidity is increased, the natural period is shortened, and the response acceleration due to the earthquake may be increased. The larger the temporary structure, the greater the response acceleration at the top. Further, the binding force at the end of the single pipe becomes large, and the single pipe easily buckles. Therefore, the force that the temporary member such as a single pipe bears becomes large, and there is a possibility that structural problems such as buckling may occur.

FIG. 13 is a diagram comparing the equivalent stiffnesses of the present invention and the prior art. As shown in this figure, adding a non-slip material to the holding portion of a conventional general clamp increases the rigidity. In this case, the restraint force at the end of the single pipe becomes large as described above, and the single pipe easily buckles. On the other hand, in the vibration control clamp of the present invention, the initial rigidity is almost the same as that of the conventional general clamp. Particularly, in the seismic control clamp of the present invention, not only the vibration is reduced by the damping action due to the deformation of the friction material, but also when the vibration is further increased and the displacement is increased, the rigidity is reduced by the deformation of the friction material and the natural period is lengthened. And, it comes to exert the seismic control effect. Therefore, according to the present invention, before the axial force of the single pipe reaches the buckling load, energy is absorbed by the deformation of the friction material, and the buckling of the single pipe can be prevented in advance.

[Temporary structure]
Next, an embodiment of the temporary structure according to the present invention will be described.
The temporary structure according to the embodiment of the present invention is a temporary structure that can be assembled and disassembled as a temporary structure, and includes the above-described damping clamp 10 of the present invention and a single pipe P. By using the vibration control clamp 10 for connecting the single pipes P to each other, the seismic performance of the temporary structure can be improved.

Here, a large number of framework scaffolds as shown in FIG. 14 may be combined to construct a large-scale temporary structure as shown in FIG. In this case, the frame scaffolding is, as shown in FIG. 14, two building frames 1, a floorboard 2 installed between the building frames 1, and cross braces 3 installed in an X shape between the side portions of the building frame 1. And single tube braces 4, 5 installed in an X shape to reinforce the cross braces 3, horizontal single tubes 6, 7 installed horizontally between the ends of the single tube braces 4, 5, and as a clamp The structure is provided with the vibration control clamp 10 of the present invention. The seismic control clamp 10 holds the single pipe braces 4, 5 with a clamp body 18 provided with a friction material 32, while holding the single pipe braces 4, 5 with a clamp body 18 not provided with the friction material 32. Set to hold 1. By doing so, the energy absorption performance between the single tube braces 4, 5 and the clamp body 18 can be improved, and a large-scale temporary structure with improved seismic performance can be realized.

As described above, according to the vibration control clamp of the present invention, two clamp bodies each having a holding portion that holds a rod-shaped temporary member are connected to each other, and have a vibration control function that absorbs vibration energy. Since it is a seismic clamp, and an energy attenuating portion is provided at a portion of one of the clamp bodies that comes into contact with the temporary member, it acts on a temporary structure composed of the temporary member and the vibration control clamp. The vibration energy generated is attenuated by the energy attenuating portion of one clamp body. Therefore, the energy absorption performance of the clamp can be improved as compared with the related art. Further, it is possible to prevent the axial force of both temporary members held by the two clamp bodies from reaching the buckling load.

Further, according to another vibration damping clamp of the present invention, since the energy attenuating portion is made of a friction material that is softer than the temporary member and is shear-deformable, the tightening force from the clamp body is greater than that of the temporary member. It is transmitted to the temporary member through the soft friction material. Therefore, the surface pressure can be dispersed. Further, since the holding portion and the surface of the temporary member are in contact with each other through this friction material, no wear damage occurs and a predetermined seismic resistance function can be continuously ensured. Further, since energy attenuation due to shear deformation of the friction material can be expected, the absorption power of vibration energy also becomes large.

Further, according to another vibration damping clamp of the present invention, while the horizontally arranged temporary member is held by the clamp body not provided with the energy attenuating portion, it is arranged obliquely with respect to the horizontal. Since the temporary member is configured to be held by the clamp body provided with the energy attenuating portion, for example, the energy absorption performance between the single tube brace obliquely arranged with respect to the horizontal and the clamp body. Can be improved.

Further, according to the temporary structure according to the present invention, the temporary structure is a temporary structure that can be assembled and disassembled as a temporary structure, and includes the above-described vibration-damping clamp and the temporary member, thus improving the seismic performance of the temporary structure. can do.

Further, according to another temporary structure according to the present invention, two building frames, a floorboard installed between the building frames, and a cross braces installed in an X shape between the side portions of the building frame, A plurality of frame scaffolds each having a single tube brace installed in an X shape for reinforcing the cross braces, a horizontal single tube horizontally installed between the ends of the single tube brace, and the vibration control clamp. The seismic control clamp holds the single tube brace with the clamp body provided with the energy attenuating portion, while the clamp body without the energy attenuating portion holds the horizontal single tube or the building. Since the frame is held, it is possible to realize a large-scale temporary structure with improved seismic performance.

INDUSTRIAL APPLICABILITY As described above, the vibration control clamp and the temporary structure according to the present invention are useful for improving the energy absorption performance of the clamp, and in particular, they are self-supporting such as a large-scale temporary competition facility and a temporary stand for spectators. Suitable for assembling large temporary structures.

10 Seismic control clamp 12 Fixed piece 14 Holding piece 16 Holding part 18 Clamp body 20 Connecting part 22 Hinge part 24 Bolt 26 Nut 28 Hinge part 30 Clamping part 32 Friction material (energy damping part)
34 Abdomen 36 Protrusion P Single pipe (temporary member)

Claims (3)

A vibration-damping clamp having a vibration-damping function for absorbing vibration energy, which is configured by connecting two clamp bodies each having a holding portion that holds a rod-shaped temporary member,
An energy attenuating portion is provided in a portion of the holding portion of one of the clamp bodies that comes into contact with the temporary member,
While holding the temporarily arranged temporary member by the clamp body not provided with the energy attenuating portion, the clamp provided with the energy attenuating portion is provided at the temporary member obliquely arranged with respect to the horizontal A vibration control clamp characterized by being configured to be held by the main body. A temporary structure that can be assembled and disassembled as a temporary structure,
A temporary structure comprising the vibration control clamp according to claim 1 and the temporary member. Two building frames, a floorboard installed between the building frames, cross braces installed in an X shape between the side portions of the building frame, and a single X-shaped installation to reinforce the cross braces. A plurality of frame scaffolds each having a pipe brace, a horizontal single pipe horizontally installed between ends of the single pipe brace, and the vibration control clamp;
The vibration control clamp holds the single pipe brace with the clamp body provided with the energy attenuating portion, while the horizontal single pipe or the building frame is held with the clamp body without the energy attenuating portion. The temporary structure according to claim 2 , which holds the temporary structure.