JP5423193B2 - Folded panel structure - Google Patents

Description

  The present invention relates to a folded plate panel excellent in energy absorption performance constituting a building structure.

  Conventionally, a structure that absorbs vibrational energy by shearing a viscoelastic body in response to vibration when the building is vibrated by an earthquake, wind, or other vibration is known as a structure for damping a building. ing.

  Furthermore, in recent years, as seen in Patent Document 1, for example, a pendulum member that is pin-joined to a pair of support portions provided on a frame member is used to increase the deformation generated in a building and A technique has also been proposed in which the viscoelastic body is greatly deformed even by a small displacement and the energy absorption efficiency is increased by transmitting it to the viscoelastic body.

  On the other hand, as seen in Patent Documents 2 and 3, as an energy absorbing structure using folded plates, a folded plate panel structure in which corrugated plates or folded plates are joined to a frame material is resisted by in-plane shearing force, thereby suppressing vibration. A technique for use as a structural material such as a wall has also been proposed.

JP 2006-132182 A JP 2006-037566 A JP 2006-037628 A

  However, since the pendulum member and its support member are pin-joined in the disclosed technique of Patent Document 1, rattling occurs at the joint, and the hysteresis property of the entire damping structure against vibration shows slip property. As a result, the area surrounded by the hysteresis curve in the shear force-shear deformation relationship with respect to the input vibration is narrowed, resulting in a problem that the energy absorption efficiency is lowered.

  In addition, in order for the pendulum member to smoothly swing with respect to the input vibration with the pin joint as a fulcrum, it is necessary to mechanically create the pin joint, which increases the burden of manufacturing labor and thus increases the manufacturing cost. The problem arises.

  Further, in the disclosed technologies of Patent Documents 2 and 3, since the folded plate panel is used as an energy absorbing structure for in-plane shearing force, energy is absorbed by causing the plate elements constituting the panel to yield by shearing. Due to a decrease in the rigidity of the plate element after yielding, overall panel buckling is induced, causing a problem that the load is rapidly decreased in a relatively small deformation region, resulting in a decrease in energy absorption efficiency.

  The present invention has been devised in view of the above-described problems, and provides a damping structure that exhibits stable energy absorption performance without slip properties with respect to input vibrations such as earthquakes and is easy to manufacture. It is aimed.

In order to achieve the above object, the present inventors have studied a mechanism for increasing the displacement of a building with a simple structural element that does not use a pendulum member that requires pin joining. As a result, by using the geometrical behavior that the folded plate is distorted in the direction substantially perpendicular to the mountain axis direction with respect to the in-plane shear force, the displacement of the building is increased without using pin joints, It was newly found that stable hysteresis properties and high energy absorption efficiency can be obtained.

Folded plate panel of claim 1, the frame member and one at the crest and the both sides of the valleys and folded plate which is bent at a predetermined interval, before the crest axial end of Kioriban a folded plate panel structure and a interposed viscoelastic body between the crest the frame member parts, respectively both sides of the valley of the folding plate, over the crest portion axially throughout Supported by the frame member via a support member, an in-plane shearing force is applied to the folded plate panel structure, and the ridge portion axial direction between the support members paired on both sides of the folded plate . When relative displacement occurs, the viscoelastic body is deformed by distorting the peak portion in a direction substantially orthogonal to the peak axis direction, and energy is absorbed with respect to the in-plane shear force. To do.

  The folded plate panel structure according to claim 2 is characterized in that a cross section of the peak portion is formed in a substantially rectangular shape.

  The folded plate panel structure according to claim 3 is the folded plate panel structure according to claim 1 or 2, wherein the viscoelastic body is connected to the frame member via a plate protruding from a peak portion of the folded plate. It is interposed between the ridges of the folded plate.

  The folded plate panel structure according to claim 4 is the folded plate panel structure according to claim 1 or 2, wherein the viscoelastic body includes the frame member and the folded plate via a plate protruding from the frame member. It is characterized in that it is interposed between the mountain parts.

  The folded plate panel structure according to claim 5 is the folded plate panel structure according to claim 1 or 2, wherein the viscoelastic body is projected from a plate protruding from the frame member and a peak portion of the folded plate. It is characterized by being interposed between the frame member and the peak portion of the folded plate through a plate.

The folded plate panel structure according to claim 6 is the folded plate panel structure according to any one of claims 3 to 5, wherein a joint portion between the plate and the ridge protruding from the ridge of the folded plate, Or the junction part of the board and frame material which protruded from the said frame material is joined by the volt | bolt, the screw, the clinch, the collar, or fitting.

According to the present invention having the above-described configuration, when an in-plane shear force is applied to the folded plate panel structure due to vibration of the building, the in-plane shear force is folded through the support member attached to the frame member. In other words, by distorting the folded plate crest in a direction substantially perpendicular to the crest axial direction, the displacement of the end of the folded plate crest is increased compared to the displacement generated in the building. And when the displacement which arose in the building is small because the viscoelastic body connected between the folded-plate mountain part edge part and the frame material so that the deformation | transformation of this folded-plate mountain part edge part may follow Can absorb vibration energy efficiently.

  As a result, the folded plate panel structure can realize a deformation increasing mechanism that uses only the geometric elastic behavior of the folded plate without using pin bonding for the deformation of the building. It is possible to exhibit an efficient and stable energy absorption performance by the viscoelastic body without exhibiting slip properties.

  In addition, the deformation increasing mechanism can be easily realized by fixing the folded plate to the frame member via the support member, so that it is excellent in manufacturability and inexpensive in manufacturing cost.

It is a figure which shows an example of the folded-panel structure to which this invention is applied, and its structure. It is a figure which shows the deformation | transformation state in an example of the folded-plate panel structure to which this invention of FIG. 1 is applied. It is a load-displacement relationship figure which shows the hysteretic property with respect to repetitive force in the folded-plate panel structure to which this invention is applied. It is a figure which shows the example which inserts a viscoelastic body between the board protruded from the frame material, and the peak part of a folded board in the folded-panel structure to which this invention is applied. In the folded plate panel structure to which this invention is applied, it is a figure which shows the example by which a viscoelastic body is interposed between the board protruded from the peak part of the folded board, and the frame material. In the folded-panel structure to which this invention is applied, it is a figure which shows the other example which interposes a viscoelastic body between the board protruded from the frame material, and the peak part of a folded board. It is a figure which shows the other example of a connection of a folded plate, a frame material, and a viscoelastic body in the folded plate panel structure to which this invention is applied.

  Embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an example of a folded plate panel structure 1 to which the present invention is applied. FIG. 1 (a) is a front view, FIG. 1 (b) is a cross-sectional view along CC 'in FIG. FIG. 1C is a cross-sectional view taken along line AA ′ in FIG. 1A, and FIG. 1D is a perspective view of a connecting portion of the frame member 2, the folded plate 3, and the viscoelastic body 4.

  As shown in FIG. 1 (a), the folded plate panel structure 1 includes a frame member 2 constituting a part of a wall, a pair of width direction support members 5 attached to the bottom surface of the frame member 2, and the support. A folded plate 3 joined to the member, and a viscoelastic body 4 interposed between the frame member 2 and the folded plate 3 are provided.

The folded plate 3 has a crest 31 and a trough 32 bent at a predetermined interval by bending a steel plate by roll forming or press forming. The crest 31 and the trough 32 are formed by an upper flange 91 and a lower A flange 92 and a web 93 formed between the upper flange 91 and the lower flange 92 are configured.

  Frame material 2 is composed of thin lightweight steel such as channel steel, lightweight steel, H-shaped steel, square steel pipe, round steel pipe, steel plate, wood, reinforced concrete, steel reinforced concrete, etc., columns, beams, trunk edges, It is a frame material such as a shear force transmission member. In FIG. 1, the frame member 2 is illustrated as a substantially rectangular shape.

  The viscoelastic body 4 may be any material as long as it exhibits a so-called viscoelastic behavior. For example, an acrylic material, a urethane material, a rubber asphalt material, a synthetic rubber material, silicon rubber, diene rubber, or the like. is there.

  Of the frame member 2, a pair of support members 5 in the width direction are attached to a vertical frame member 21 provided in a substantially vertical direction, and the folded plate 3 is arranged inside the frame member 2. As shown, the lower flange 92 of the trough 32 is joined to the support member 5. A plate 6 is joined to a substantially horizontal central portion of the horizontal frame member 22 provided in a substantially horizontal direction in the frame member 2, and the plate 6 projects inward from the frame member 2. ing. The viscoelastic body 4 is interposed between the plate 6 projecting inward and the upper flange 91 of the peak portion 31. For example, drill screws, bolts, screws, scissors, rivets, spot welding, continuous welding, adhesion, and the like are used for joining the frame member 2, the folded plate 3, the support member 5, and the plate member 6. FIG. Shows an example in which a drill screw 35 is used. Here, when the lower flange 92 is joined to the support member 5 in the vicinity of both ends in the width direction, the valley 32 is prevented from being lifted from the frame member 2.

As one of the technical features of the present invention, only the lower flange 92 is joined and fixed to the support member 5, so that the upper flange 91 and the web 93 that form the peak 31 are both substantially perpendicular to the peak axis direction. It is movable in the direction of arrow BB ′.

  Here, the operation and energy absorption mechanism of the folded plate panel structure 1 to which the present invention is applied will be described. Fig.2 (a) is a figure which shows the deformation | transformation of the folding plate panel structure 1 whole when the in-plane shear force Q is loaded by the earthquake etc. to the folding plate panel structure 1 shown to Fig.1 (a). 2 (b) is a modification of only the folded plate 3 in FIG. 2 (a), FIG. 2 (c) is a sectional view taken along the line DD 'in FIG. 2 (a), and FIG. 2 (d) is FIG. EE 'sectional drawing in (a) is shown in figure.

  When an in-plane shear force Q is applied in the direction of the arrow Q shown in FIG. 2A due to an earthquake or the like, that is, in the B direction on the DD ′ cross section side and in the B ′ direction on the EE ′ cross section side, The portion 31 is deformed so as to be distorted in a direction substantially orthogonal to the axial direction of the peak portion 31 so as to collapse in the opposite direction in the B ′ direction on the DD ′ cross section side and in the B direction on the EE ′ cross section side. On the contrary, when the in-plane shear force Q is applied in the B ′ direction on the DD ′ cross section side and in the B direction on the EE ′ cross section side, the peak portion 31 is on the DD ′ cross section side. In the B direction, it falls in the B ′ direction on the EE ′ cross section side.

In this manner, the peak portion 31 is distorted in a direction substantially orthogonal to the axial direction thereof, so that a deviation d1 between the pair of support members 5 due to an earthquake or the like and the direction of the arrow B-B 'in FIG. Is amplified to a displacement d2 in the direction of a double arrow BB ′ at the vertical end of the upper flange 91. Further, since the displacement direction of the displacement d2 of the vertical end portion of the upper flange 91 is opposite to the displacement in the direction of the double arrow BB ′ generated in the horizontal frame material 22, the direction of the upper flange 91 relative to the horizontal frame material 22 is reversed. The relative displacement increases. As a result, the amount of shear deformation of the viscoelastic body 4 locked between the plate 6 fixed to the horizontal frame member 22 and the upper flange 91 in the direction of the double arrow BB ′ is increased. Energy can be absorbed efficiently.

  Further, since the displacement increasing mechanism and the energy absorbing mechanism are based on the expression of the geometric deformation behavior of the folded plate 3, the history of displacement-load history of the folded plate panel structure 1 with respect to repetitive forces such as seismic force. 3 has a spindle shape as shown in FIG. 3, and exhibits stable energy absorption performance as compared with a conventional slip shape (historical property with a small load increment with respect to an increase in displacement in a low load region).

  In the present invention, the strength of the joints in the frame member 2, the folded plate 3, the support member 5, and the plate member 6 is determined in the load region when the folded plate panel absorbs energy by the in-plane shear force Q. However, the slip property accompanying the local collapse of the joint portion can be easily avoided by designing so as not to yield more than the folded plate 3. Incidentally, the strength of the joint can be designed, for example, by adjusting the number and diameter of the drill screws 35 in FIG.

  FIG. 4 shows a folded plate panel structure 1 to which the present invention is applied. The portion surrounded by the upper flange 91, the web 93, and the extension line of the lower flange 92 in the cross section of the peak portion 31 has a substantially rectangular shape. It is. Here, according to structural experiments and analysis, the angle formed by the upper flange 91 and the web 93 and the angle formed by the lower flange 92 and the web 93 are preferably 70 ° to 110 °, and 85 ° to 95 °. Is more preferable. In the case where the cross section of the peak portion 31 has a substantially rectangular shape, when the in-plane shear force Q is applied, the cross section smoothly deforms from a substantially rectangular shape to a substantially parallelogram shape. On the other hand, it is possible to ensure deformation performance by distorting in a substantially orthogonal direction (arrow B-B 'direction in the figure), and the deformation increasing mechanism and the energy absorbing mechanism are effectively expressed.

FIGS. 5 and 6 show the folded plate panel structure 1 to which the present invention is applied. The plate 7 attached to the end of the upper flange 91 in the axial direction of the mountain portion is interposed between the horizontal frame member 22 and the mountain portion 31. The example which interposes the elastic body 4 is shown. The plate 7 is sandwiched between a pair of upper and lower viscoelastic bodies 4 fitted in a horizontal frame member 22 configured as channel steel, and the other end portion protrudes inside the frame member 2. So that it is fixed. Incidentally, a pair of upper and lower viscoelastic body 4, not only is fixed to the inside of the lateral frame member 22 as shown in FIG. 5, as shown in FIG. 6, the frame member from the upper and lower surfaces of the horizontal frame member 22 The plate 6 is attached so as to protrude to the inside of the plate 2 , the viscoelastic body 4 is fixed between the plates 6 disposed above and below, and the plate 7 attached to the upper flange 91 between the viscoelastic bodies 4. May be held. Further , the folded plate 3 is fixed to the vertical frame member 21 via the support member 5 as in FIGS.

  Thereby, since a pair of upper and lower viscoelastic bodies 4 holding the plate 7 can be shear-deformed at the same time, efficient energy absorption becomes possible. Further, in the example shown in FIG. 6, the viscoelastic body 4 is not directly fixed to the folded plate 3 and the horizontal frame member 22, so that the joint between the plate 7 and the folded plate 3, the plate 6 and the horizontal frame member 22 By setting the joint portion as a dry joint such as a bolt, screw, clinch, scissors, fitting, etc., the energy absorbing portion can be easily attached or replaced. Note that either one of the pair of upper and lower viscoelastic bodies 4 holding the plate 7 may be omitted.

FIG. 7 shows an example in which two folded plates 3 are used in the folded plate panel structure 1 to which the present invention is applied. The two folded plates 3 are joined to each other by causing the lower flanges 92 to face each other and sandwiching one end of the support member 5 between the opposed lower flanges 92. The supporting member 5 is attached with a section steel 8 (for example, angle steel) on the other end side with respect to the side to which the lower flange 92 is joined, and is further fixed to the vertical frame member 21 via the section steel 8 and thus the frame. Arranged inside the material 2. The viscoelastic body 4 is locked between the upper flange 91 of the two folded plates 3 and the plate 6 attached so as to protrude from the horizontal frame member 22 to the inside of the frame member 2 .

Thereby, since the folded plate 3 can be provided in the center of the inner side of the frame member 2 so as to be plane- symmetrical in the wall thickness direction, torsion of the folded plate panel structure and the like can be suppressed, and a more stable behavior can be secured. For joining the shape steel 8 and the vertical frame material 21, drill screws, welding, bolts, studs according to the structural type of the frame material 2 (thin plate light weight steel structure, steel structure, wooden structure, reinforced concrete structure, etc.) Etc. are used.

In these forms of FIGS. 5, 6, and 7, the peak portion 31 is movable and is distorted in a direction substantially orthogonal to the peak portion axis direction (BB ′ direction in the figure), while ensuring stable hysteresis properties. Of course, the displacement generated in the building is increased and transmitted to the viscoelastic body 4 to exhibit excellent energy absorption performance against vibrations such as earthquakes. In addition, the vertical frame material 21 and the horizontal frame material 22 in FIG. Although composed of reinforced concrete, steel reinforced concrete, etc., in FIG. 5 , the vertical frame material 21 is illustrated as a rectangular shape, and the horizontal frame material 22 is illustrated as a groove shape, and in FIGS. 1 , 4, 6 , and 7 , the vertical frame material is illustrated. Both 21 and the horizontal frame material 22 are illustrated as rectangular shapes.

DESCRIPTION OF SYMBOLS 1 Folded plate panel structure 2 Frame material 3 Folded plate 4 Viscoelastic body 5 Support member 6, 7 Plate 8 Shape steel 21 Vertical frame material 22 Horizontal frame material 31 Mountain part 32 Valley part 35 Drill screw 91 Upper flange 92 Lower flange 93 Web

Claims (6)

A frame material, a folded plate in which one peak and valleys on both sides of the frame are bent at a predetermined interval, and a peak between the peaks in the axial direction of the folded plate and the frame material A folded panel structure comprising a viscoelastic body mounted,
The troughs on both sides of the folded plate are each supported by the frame member via a support member over the entire mountain axial direction.
When an in-plane shearing force is applied to the folded plate panel structure and a relative displacement in the peak portion axial direction occurs between the support members paired on both sides of the folded plate, A folded plate panel structure characterized in that the viscoelastic body is deformed by distorting it in a direction substantially perpendicular to the partial axis direction and energy is absorbed against the in-plane shear force. The folded plate panel structure according to claim 1, wherein a cross section of the peak portion is formed in a substantially rectangular shape. The viscoelastic body is interposed between the frame member and the peak portion of the folded plate via a plate protruding from the peak portion of the folded plate. The folded plate panel structure described. The fold according to claim 1 or 2, wherein the viscoelastic body is interposed between the frame member and a peak portion of the folded plate via a plate protruding from the frame member. Board panel structure. The viscoelastic body is interposed between the frame member and the peak portion of the folded plate via a plate protruding from the frame member and a plate protruding from the peak portion of the folded plate. The folded plate panel structure according to claim 1 or 2, characterized in that: The joint between the plate and the ridge protruding from the crest of the folded plate, or the connection between the plate and the frame protruding from the frame material is joined by bolts, screws, clinch, scissors or fitting. The folded plate panel structure according to any one of claims 3 to 5, wherein the folded plate panel structure is provided.

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