WO2007083505A1

WO2007083505A1 - Load bearing frame

Info

Publication number: WO2007083505A1
Application number: PCT/JP2006/326154
Authority: WO
Inventors: Tomokazu Nakagawa; Tadao Hatanaka; Toshikazu Karatsu; Nobuo Hiura; Tetsuo Tamada; Takeshi Morii; Takeo Suga; Fumio Watanabe
Original assignee: Kabushiki Kaisha Kobe Seiko Sho
Priority date: 2006-01-17
Filing date: 2006-12-27
Publication date: 2007-07-26
Also published as: JP4648203B2; US20100031600A1; CN101346520A; JP2007191854A; TWI324655B; TW200730701A; KR20080074226A

Abstract

A load bearing frame which prevents buckling of a diagonal brace and breaking of a joint, and has a high deformation capacity. The load bearing frame (1) comprises two column element (2, 3), two frame elements (4, 5) and four diagonal braces (6-9). The joint (41) between the column element (3) and the frame element (4) is separated a distance L1 from the joint (43) between the upper-most diagonal brace (6) and the column element (3), and the joint (48) between the column element (3) and the frame element (5) is separated a distance L2 from the joint (47) between the lower-most diagonal brace (9) and the column element (3).

Description

Specification

Moisture resistant frame

Technical field

[0001] The present invention relates to an anti-frame used for forming a wall surface of a building.

Background art

[0002] A general anti-frame is a substantially rectangular shape in which both ends of two pillar members are connected by two frame members, and the two pillar members are slanted by a plurality of diagonal members. (See, for example, Patent Documents 1 and 2). Here, in the conventional frame-resistant frame, the connection point between the diagonal member and the column member arranged at the uppermost and lowermost positions coincides with the corners of the frame. With this structure, the force is transmitted smoothly, but when an excessive horizontal load is applied, stress concentrates on the diagonal and the connecting part, causing the buckling of the diagonal and the connecting part. There is a problem that the destruction of the frame occurs early and the deformability of the entire frame is small. In order to solve this problem, it is conceivable to increase the strength of the diagonal material (cross-sectional performance) and the rigidity of the connecting part. However, in this case, although the maximum resistance is increased, the deformability (stickiness) of the entire frame is reduced, so that the entire frame may collapse rapidly after the load reaches the maximum. Further, as another method for solving the above problem, it is conceivable to separate the connecting portion between the diagonal member and the column member vertically (see, for example, Patent Document 3). In a frame-resistant frame with this structure, when a horizontal load is applied, the diagonal member is plastically deformed in the axial direction, and the column member is also bent plastically, so that the deformability of the entire frame is improved.

Patent Document 1: Japanese Published Patent Publication: 2002-30745 (Figure 1)

Patent Document 2: Japanese Published Patent Publication: 2004-116036 (Fig. 1)

Patent Document 3: Japanese Patent No. 2942481 (Figure 1)

Disclosure of the invention

Problems to be solved by the invention

[0003] However, in the case of the frame-resistant frame having this structure, when an excessive horizontal load is applied, the column material is plastically deformed by bending, so that the yield strength for supporting the load in the vertical direction is significantly reduced. End up. For this reason, this frame can not be used as the main structure of a building and can only be placed near another pillar that supports vertical loads.

[0004] Therefore, a main object of the present invention is to provide a high-deformation-resistant frame that suppresses occurrence of buckling of a diagonal member and breakage of a connecting portion.

Means for solving the problem

[0005] The resistance frame according to the present invention includes a first column member, a second column member, and a first frame that connects one end of each of the first column member and the second column member. And a second frame member that connects the other end portions of the first pillar member and the second pillar member, except for both ends of the first pillar member. A first diagonal member that connects the connecting position of the second pillar member to a position other than both ends of the second pillar member and closer to one end portion of the second pillar member than the connecting position; and A connecting position other than both ends of the first column member and a position other than both ends of the second column member and located on the other end side of the second column member than the connecting position. A second diagonal member to be connected is provided with respect to one or a plurality of connection positions, and the first diagonal member and the second column member that are arranged at one end side of the second column member most. Connection point The first diagonal member and the second member are separated from the connection point between the second column member and the first frame member, and are disposed closest to the other end of the second column member. The connection point between the second column member and the second frame member is separated from the connection point between the second column member and the second frame member.

[0006] Here, the connection point between the first diagonal member and the second column member is the intersection of the extension line of the central axis of the first diagonal member and the central axis of the second column member. The connection point between the second column member and the first frame member is the intersection of the central axis of the second column member and the central axis of the first frame member, and the second column member and the second frame member. The point of connection with is the intersection of the central axis of the second column and the central axis of the second frame.

[0007] According to this configuration, even when a horizontal load (a load in a direction perpendicular to the column material) is applied to the frame, the horizontal load is not directly transmitted to the diagonal member, but between the corner of the frame and the diagonal member. Therefore, excessive stress is suppressed from occurring in the diagonal member and the connecting part. In addition, the rigidity of the frame is smaller and it is easier to deform compared to the conventional frame where the connecting point between the diagonal and the column coincides with the corner of the frame. Collapse can be prevented. For this reason, in the present invention, the buckling of the diagonal member and the early occurrence of breakage of the connecting portion are suppressed, and the energy absorption performance with excellent deformability as a whole frame. Is obtained.

[0008] Furthermore, in the frame-resistant frame of the present invention, a connection point between the first diagonal member and the second column member, which is disposed closest to one end portion of the second column member, and the second The distance between the column member and the connection point of the first frame member, and the first diagonal member and the second column disposed closest to the other end of the second column member The distance between the connection point with the material and the connection point between the second pillar member and the second frame member is a distance corresponding to 5 to 20% of the total length of the second pillar member. It's okay.

[0009] According to this configuration, it is possible to prevent the buckling of the diagonal member and the early occurrence of the breakage of the connecting portion, and it is possible to prevent the yield strength of the entire frame from being significantly reduced.

[0010] Further, in the resistance frame according to the present invention, a position other than both end portions of the first frame member is connected to a position other than both end portions of the second frame member, and the first oblique member is connected. It may be further provided with a reinforcing material joined to the material and the second diagonal material.

[0011] According to this configuration, even when the length of the diagonal member is longer than the frame height (rectangular frame height) (when the ratio of the frame width to the height is large), the diagonal member is resistant to buckling. Can improve mosquitoes. Therefore, it is possible to improve the yield strength of the entire frame.

[0012] Further, the resistance frame of the present invention further includes a connecting member disposed between the first and second column members and the first and second diagonal members, and the connecting member May be fixed to the first and second column members at fixed positions spaced inward from the column corners of the first and second column members.

[0013] According to this configuration, even when a force in a direction away from the column member acts on the diagonal member, energy is absorbed by the plastic deformation of the connecting member. Therefore, the yield strength of the entire frame is improved.

[0014] Furthermore, in the frame-resistant frame of the present invention, the distance between the column corners of the first and second column members and the fixed position is the side width of the first and second column members. It may be a distance corresponding to 20-30%.

Brief Description of Drawings

[0015] FIG. 1 is a diagram showing a schematic configuration of a resistance frame according to a first embodiment of the present invention. (A) is a front view, (b) is a bottom view, and (c) is a side view. It is. FIG. 2 is an enlarged view of the vicinity of a connecting portion between a column member and a connecting member.

3 is a cross-sectional view taken along the line ΠΙ-ΠΙ in FIG.

FIG. 4 is a view showing a deformed state of a connecting member.

FIG. 5 is a diagram showing a schematic configuration of a resistance frame according to a second embodiment of the present invention, (a) is a front view, (b) is a bottom view, and (c) is a side view.

FIG. 6 is a diagram showing frame fixing conditions and loading conditions in an evaluation test.

FIG. 7 is a diagram showing the results of an evaluation test.

Explanation of symbols

[0016] 1, 01 meta frame

2, 3 pillar materials

4, 5 frame material

6, 7, 8, 9 diagonal

10 Connecting members

102, 103 reinforcement

BEST MODE FOR CARRYING OUT THE INVENTION

[0017] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a frame for frame protection according to a first embodiment of the present invention, where (a) is a front view, (b) is a bottom view, and (c) is a side view. Fig. 2 is an enlarged view of the vicinity of the connecting part between the column member and the connecting member. In FIG. 2, the vicinity of the connecting portion between the column member 3 and the connecting member 10 is illustrated. The configuration in the vicinity of the connecting portion between the column member 2 and the connecting member 10 is the same. FIG. 3 is a cross-sectional view taken along the line ΠΙ-ΠΙ in FIG.

[0018] A resistance frame 1 (hereinafter referred to as "frame 1") shown in FIG. 1 is a steel frame for steel Knowus. The frame 1 has two column members 2 and 3, two frame members 4 and 5, and four diagonal members 6 to 9. The column members 2 and 3 and the frame members 4 and 5 are rectangular tube members (see FIG. 2) having a rectangular cross section, and the diagonal members 6 to 9 are open cross-sectional members.

The two column members 2 and 3 extend in the vertical direction and are arranged in parallel to each other at a predetermined interval. The two frame members 4 and 5 are arranged horizontally and connect the upper end portions or the lower end portions of the column members 2 and 3 respectively. Therefore, the outer shape of frame 1 is based on pillar materials 2 and 3 and frame materials 4 and 5. It is configured in a substantially rectangular shape.

The four diagonal members 6 to 9 connect positions other than the upper end and the lower end of the column members 2 and 3 through a connecting member 10. Here, the diagonal members 6 to 9 and the connecting member 10 are joined by spot welding. In FIG. 1, the joining positions are indicated by circles (circles). The connecting member 10 and the column members 2 and 3 are joined by screw fastening as will be described later.

The diagonal members 6 to 9 are arranged in order from the upper side to the lower side. The diagonal members 6, 8 are inclined and arranged in parallel so that their left end portions are below the right end portion, and the diagonal members 7, 9 are so that their right end portions are below the left end portion. They are inclined and arranged parallel to each other.

[0022] More specifically, the diagonal member 6 is separated downward by a distance L1 from the connection point 41 between the column member 3 and the frame member 4 (intersection of the center axis of the column member 3 and the center axis of the frame member 4). The connection point 43 of the column 3 and the connection point 42 of the column 2 and the frame 4 (intersection of the center axis of the column 2 and the center axis of the frame 4) are separated downward by the distance LI + L3. Connect the connection point 44 of the pillar material 2 Here, for example, the state where the diagonal member 6 and the column member 3 are connected at the connection point 43 means that the intersection of the central axis of the column member 3 and the extension line of the central axis of the diagonal member 6 intersects at the connection point 43. Indicate state.

[0023] In addition, the diagonal member 7 is a column member 2 that is separated from the connection point 42 by a distance LI + L3 and a connection point 4 4 of the column member 2 and a column material that is separated from the connection point 41 by a distance L1 + 2 X L3. Connect 3 connecting point 45. Similarly, diagonal member 8 is connected to column 45 of column 3 separated by a distance L1 + 2 X L3 from connection point 41, and column 2 separated from connection point 42 by a distance L1 + 3 X L3. Connect to connection point 46. The diagonal 9 is connected to the connection point 46 of the column 2 separated from the connection point 42 by a distance L1 + 3 X L3, and the connection point 48 between the column 3 and the frame 5 (the center axis of the column 3 (Intersection with the center axis of frame 5) Force Connection point of column 3 separated by distance L2 upward 47 (Connection point of column 3 separated by distance L1 +4 X L3 from connection point 41) Concatenate).

[0024] In the present embodiment, the distance L1 between the connection point 41 between the column member 3 and the frame member 4 and the connection point 43 between the diagonal member 6 disposed at the uppermost position and the column member 3 is the column member The distance corresponds to 8.8% of the total length of 3. In addition, the distance L2 between the connection point 48 between the column 3 and the frame 5 and the connection point 47 between the diagonal member 9 and the column 3 arranged at the bottom is 15.8% of the total length of the column. Corresponding distance. Here, when the distances Ll and L2 are less than 5% of the total length of the column member 3, the connecting portion between the diagonal member and the column member The stress becomes excessive, and the buckling of the diagonal member and the breakage of the connecting portion occur early. On the other hand, when the distances Ll and L2 exceed 20% of the total length of the column member 3, the force transmitted to the diagonal member is too small and the proof stress of the entire frame is greatly reduced. Therefore, the distances Ll and L2 are preferably distances corresponding to 5 to 20% of the total length of the column member 3.

As shown in FIG. 2, the connecting member 10 is a member having a U-shaped cross section, and eight screw holes 10a (see FIG. 3) are formed on one side surface thereof. In addition, eight screw holes 2a and 3a (see FIG. 3) corresponding to the eight screw holes 10a of the connecting member 10 are formed at the mounting position of the connecting member 10 on one side surface of the column members 2 and 3. Yes. Therefore, as shown in FIG. 3, the connecting member 10 is screwed by the screw 11 in a state where the screw hole 10a and the screw hole 2a of the column member 2 or the screw hole 3a of the column member 3 are aligned.

[0026] Further, the connecting member 10 is screw-fastened at a position spaced from the both ends inward by a distance C, where D is the width of one side surface of the column members 2, 3 and one side surface of the connecting member 10. . That is, the screw holes 2a, 3a, 10a are formed at positions separated from the column corners by the distance C. Here, the distance C between the column corner and the screw fastening position is preferably a distance corresponding to 20 to 30% of the width D of the inner surface of the column members 2 and 3. In this way, the connecting member 10 is screw-fastened at a position where the column corner portion force is separated by a certain interval, as shown in FIG. 4, in the direction in which the column 2 and 3 forces are also separated (the arrow direction in FIG. 4). This is because when the force acts on the diagonal member, the connecting member 10 absorbs energy by plastic deformation. In FIG. 4, the connecting member 10 before plastic deformation is illustrated by a broken line, and the connecting member 10 after plastic deformation is illustrated by a thick line.

Next, a resistance frame according to the second embodiment of the present invention will be described with reference to FIG. FIGS. 5A and 5B are diagrams showing a schematic configuration of a resistance frame according to the second embodiment of the present invention, where FIG. 5A is a front view, FIG. 5B is a bottom view, and FIG. 5C is a side view.

[0028] The resistance against frame 101 (hereinafter referred to as frame 101) force of the second embodiment is different from the frame 1 of the first embodiment in that it further includes two reinforcing members 102, 102. It is. Since the other structure of frame 101 is the same as that of frame 1, the same reference numerals are used and detailed description is omitted.

[0029] The two reinforcing members 102 and 103 are flat members. The reinforcing material 102 is disposed on the front side surface of the frame 101, connects the central portion of the frame material 4 and the central portion of the frame material 5, and is an oblique material. It is joined to the center of 6-9. Similarly, the reinforcing member 103 is disposed on the inner surface of the frame 101, connects the central part of the frame member 4 and the central part of the frame member 5, and is connected to the central part of the diagonal members 6-9. It is joined.

Next, the evaluation test for the frames 1 and 101 and the results thereof will be described with reference to FIGS. 6 and 7. Fig. 6 is a diagram showing the frame fixing conditions and loading conditions in the evaluation test. FIG. 7 shows the test results and shows the relationship between the shear deformation angle and the horizontal load (shear deformation angle—the envelope of the horizontal load curve). Here, the evaluation test was performed by repeatedly applying a horizontal load to the upper ends of the frames 1 and 101 while the lower ends of the frames 1 and 101 were fixed. As a comparative example, in addition to frames 1 and 101, a similar test was performed on a conventional frame.

[0031] In the conventional frame, the connecting portion is destroyed and the final frame is reached. On the other hand, in Frame 1, the connecting part does not break, and the deformability and maximum load are significantly higher than the conventional frame, as shown in the test results in Fig. 6. Frame 1 eventually ended with the diagonal buckling of plastic. However, the frame 101 with the added reinforcing material did not cause the buckling of the diagonal material as well as the breakage of the joints, and higher energy absorption performance than the frame 1 was obtained.

[0032] As described above, in the frames 1, 101 of the present embodiment, even when a horizontal load is applied, the horizontal load is not directly transmitted to the diagonal members 6-9. The horizontal load is the column material between the corners of the frame and the diagonal material (the part corresponding to the connection between the connection point 41 and the connection point 43 of the column material 3, and the connection point 47 and the connection point of the column material 3). 48), it is transmitted indirectly via the corresponding portion), so that excessive stress is suppressed from occurring in the diagonal members 6 to 9 and the connecting portion. In addition, compared to the conventional frame where the connecting part between the diagonal and the column is coincident with the corner of the frame, the frame is less rigid and more easily deformed. Can be prevented. Therefore, in the present invention, the buckling of the diagonal members 6 to 9 and the early occurrence of the breakage of the connecting portion are suppressed, and the energy absorption performance with excellent deformability can be obtained as the whole frame.

[0033] Further, the frames 1, 101 of the present invention delay the occurrence of buckling of the diagonal member and the breakage of the connecting portion, which is not a structure in which energy is absorbed by bending plastic deformation of the column member, so that the entire frame can be obtained. Balanced energy absorption performance can be realized. Also, the vertical direction It can be used as the main structure of a building because its proof strength against load is not significantly reduced.

[0034] Further, since the distances Ll and L2 correspond to 5 to 20% of the total length of the column member 3, the buckling of the diagonal member and the early occurrence of breakage of the connecting portion are suppressed, and the frame It is possible to prevent the overall resistance to drastically decreasing.

[0035] Since the frame 101 is reinforced by the reinforcing members 102 and 103, the distance between the diagonal members 6 to 9 is longer than the frame height (rectangular frame height) (the width and height of the frame). Even if the ratio is large), the buckling strength of diagonal materials can be improved. Therefore, it is possible to improve the yield strength of the entire frame.

In addition, the connecting member 10 is screwed to the column members 2 and 3 at a screw tightening position spaced inward from the column corners of the column members 2 and 3 by a predetermined distance. Therefore, even when a force in a direction away from the column members 2 and 3 acts on the diagonal members 6 to 9, energy is absorbed by the plastic deformation of the connecting member 10. Therefore, the proof stress of the whole frame improves.

[0037] The power described above for the preferred embodiment of the present invention The present invention is not limited to the above-described embodiment, and various design changes are possible as long as they are described in the claims. . For example, in the above-described embodiment, the frames 1 and 101 may have four diagonal members 6 to 9 and the number of diagonal members may be changed. The distances Ll and L2 can be changed.

Claims

The scope of the claims

[1] A first pillar member, a second pillar member, a first frame member that connects one end of each of the first pillar member and the second pillar member, and the first pillar member In a frame-resistant frame having a column member and a second frame member connecting the other end of each of the second column members,

A connection position other than both ends of the first column member, and a position other than both ends of the second column member and a position closer to one end of the second column member than the connection position. The first diagonal member to be connected and the connection position other than both ends of the first pillar member, and the position other than both ends of the second pillar member, and the second position than the connection position. A second diagonal force that connects the position on the other end side of the column member with respect to one or more connecting positions,

The connection point between the first diagonal member and the second column member, which is arranged closest to one end of the second column member, is the connection between the second column member and the first frame member. The connection point between the first diagonal member and the second column member, which is separated from the point and is disposed on the other end side of the second column member, is the second column member. The anti-frame, characterized in that the connecting point force with the second frame member is separated.

[2] A connection point between the first diagonal member and the second column member, which is disposed closest to one end of the second column member, and the second column member and the first frame member. And the connection point between the first diagonal member and the second column member, which is located closest to the other end of the second column member, and the second 2. The distance between the column member and the connection point of the second frame member is a distance corresponding to 5 to 20% of the total length of the second column member. Anti-cuff frame.

[3] A position other than both ends of the first frame member is connected to a position other than both ends of the second frame member, and is joined to the first diagonal member and the second diagonal member. 3. The resistance frame according to claim 1, further comprising a reinforcing material.

[4] The apparatus further comprises a connecting member disposed between the first and second column members and the first and second diagonal members,

The connection member is fixed to the first and second column members at a fixed position spaced inward from the column corners of the first and second column members. Any one of the above-mentioned resistance to frame. The distance between the column corners of the first and second column members and the fixed position is a distance corresponding to 20 to 30% of the side surface width of the first and second column members. The frame according to claim 4.