Assembly type friction self-resetting wooden column foot joint

Abstract

The invention belongs to the technical field of civil engineering, and particularly relates to an assembly type friction self-resetting wooden column foot joint which comprises a foundation, a column shoe is detachably connected to the foundation, resetting assemblies are arranged at the connecting positions of the column shoe and the foundation, a containing groove of the column shoe is of a rectangular structure, and a clamping plate piece is arranged in the middle of the containing groove; a friction piece is arranged in a crack of the clamping plate piece, the friction piece is detachably connected with the foundation, a rectangular-section wooden column is inserted into the containing groove, a notch is formed in the middle of the bottom end of the rectangular-section wooden column, and the notch is used for containing the clamping plate piece and the friction piece. The top face of the friction piece makes friction contact with the bottom end of the rectangular-section wooden column, and the column shoe, the clamping plate piece and the friction piece are all detachably connected with the rectangular-section wooden column. Lateral displacement, residual deformation and earthquake damage of the wood structure building are effectively reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of civil engineering, and particularly relates to an assembled friction self - resetting wooden column - footing joint. Background Art

[0002] In recent years, wooden structures have become popular all over the world. They have many advantages such as flexible design, short construction period, and easy renovation. However, relying solely on their own structural strength is not enough to gain an advantage in earthquake - prone areas, and it is even more difficult for high - rise wooden structures to show their strengths.

[0003] As a vertical load - bearing and lateral - force - bearing member in a wooden structure, a wooden column bears the brunt of absorbing seismic energy under earthquake action, and will have large lateral displacements and residual displacements. Traditional bolted steel - filled plate connection joints often undergo brittle failure, leaving large residual deformations after the earthquake, affecting the normal service function of the structure and having a high repair cost.

[0004] Therefore, it is necessary to provide an assembled friction self - resetting wooden column - footing joint to solve the above - mentioned technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an assembled friction self - resetting wooden column - footing joint to solve the problems existing in the above - mentioned prior art.

[0006] To achieve the above object, the present invention provides an assembled friction self - resetting wooden column - footing joint, which includes a foundation. A column shoe is detachably connected to the foundation, and a reset assembly is provided at the connection between the column shoe and the foundation. The receiving groove of the column shoe is of a rectangular structure. A clamping plate member is provided in the middle of the receiving groove. A friction member is provided in the gap of the clamping plate member, and the friction member is detachably connected to the foundation. A wooden column with a rectangular cross - section is inserted into the receiving groove. A notch is opened in the middle of the bottom end of the wooden column with a rectangular cross - section, and the notch is used to accommodate the clamping plate member and the friction member. The top surface of the friction member is in frictional contact with the bottom end of the wooden column with a rectangular cross - section. The column shoe, the clamping plate member, and the friction member are all detachably connected to the wooden column with a rectangular cross - section.

[0007] Preferably, the column shoe includes two sets of oppositely arranged boot sleeves. The two sets of boot sleeves enclose to form the receiving groove. The boot sleeve includes a bottom plate. One side of the top end of the bottom plate is vertically connected with a U - shaped plate, and a rib plate is connected between the bottom plate and the U - shaped plate. The U - shaped plates on the two sets of boot sleeves are arranged with their openings facing each other.

[0008] Preferably, the clamping plate member includes two vertical plates fixedly connected to the opposite sides of the column shoe. The two vertical plates are arranged in parallel and form the gap.

[0009] Preferably, the friction member is a T - shaped friction plate.

[0010] Preferably, the diameter of the through holes on the T-shaped friction plate is larger than the diameters of the through holes on the column shoe and the friction energy dissipation mechanism.

[0011] Preferably, the reset assembly includes a disc spring. A plurality of second anchor bolts are pre-embedded in the foundation. A plurality of third bolt holes are formed in the bottom plate. The plurality of third bolt holes are arranged in one-to-one correspondence with the plurality of second anchor bolts. The top ends of the second anchor bolts sequentially pass through the third bolt holes, the disc spring and are threadedly connected with nuts, and the nuts are used to compress the disc spring.

[0012] Preferably, a plurality of first anchor bolts are also pre-embedded in the foundation. A plurality of fourth bolt holes are formed in the transverse plate of the T-shaped friction plate. The plurality of fourth bolt holes are arranged in one-to-one correspondence with the plurality of first anchor bolts. The top ends of the plurality of first anchor bolts pass through the fourth bolt holes and are tightened with nuts.

[0013] Preferably, a plurality of steel pads are inserted between the side wall of the rectangular-section wooden column and the U-shaped plate, and the top ends of the steel pads are slightly higher than the U-shaped plate.

[0014] Preferably, two vertical grooves are formed on one side of the U-shaped plate close to the rectangular-section wooden column. The steel pads are inserted between the side wall of the rectangular-section wooden column and the U-shaped plate through the vertical grooves, and both sides of the steel pads are respectively abutted against the side wall of the rectangular-section wooden column and the inner wall of the vertical groove.

[0015] Compared with the prior art, the present invention has the following advantages and technical effects:

[0016] 1. The device of the present invention uses a T-shaped friction plate as a friction energy dissipation component to dissipate seismic energy. Each component is connected in an assembled manner. After an earthquake, the damaged components can be replaced or the bolts can be re-tightened to achieve the repair mechanism and replacement mechanism.

[0017] 2. Under the action of minor earthquakes, the column foot will not be separated from the foundation, which can ensure the initial stiffness of the structure; under the action of medium and major earthquakes, the disc spring is compressed to lift the column foot to reduce the seismic action of the structure. After the earthquake, the structure self-resets under the vertical load and the pre-tightening force of the disc spring, which will effectively avoid the brittle cracking failure at the column foot of the glued laminated wood column at the present stage, realize micro-damage of the structure under strong earthquake action. The stiffening rib angle steel of the column shoe can limit the displacement of the structure during loading and play a role in guiding closure after unloading, thus having a beneficial effect on preventing the structure from collapsing.

[0018] 3. The bending resistance of the structure is effectively enhanced through the steel-wood hybrid structure. Its steel structure can be prefabricated in the factory, is suitable for on-site assembly, and shortens the construction period of the wooden structure building. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings:

[0020] Figure 1 Schematic diagram of the structure of an assembled friction self - resetting wooden column - footing joint proposed by the present invention;

[0021] Figure 2 Front view of an assembled friction self - resetting wooden column - footing joint proposed by the present invention;

[0022] Figure 3 Schematic diagram of the structure of the column shoe and the splint in the present invention;

[0023] Figure 4 Schematic diagram of the structure of the T - shaped friction plate in the present invention;

[0024] Figure 5 Schematic diagram of the structure of the wooden column with a rectangular cross - section in the present invention;

[0025] Wherein: 1. Column shoe; 2. T - shaped friction plate; 3. Anchor bolt one; 4. Anchor bolt two; 5. Disc spring; 6. Steel backing plate; 7. Bolt; 8. Wooden column with a rectangular cross - section; 9. Notch; 10. Foundation; 11. Bolt hole six; 12. Bolt hole four; 13. Bolt hole five; 14. Bolt hole one; 15. Bolt hole two; 16. Bolt hole three; 17. Vertical plate; 18. Bottom plate; 19. U - shaped plate. Detailed implementation manners

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] To make the above - mentioned objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.

[0028] Refer to Figures 1 to 5As shown in the figure, the present invention provides an assembled friction self - resetting wooden column - footing joint, which includes a foundation 10. A column shoe 1 is detachably connected to the foundation 10, and a reset assembly is arranged at the connection between the column shoe 1 and the foundation 10. The receiving groove of the column shoe 1 is of a rectangular structure. A clamping plate member is arranged in the middle of the receiving groove, and a friction member is arranged in the gap of the clamping plate member. The friction member is detachably connected to the foundation 10. A wooden column 8 with a rectangular cross - section is inserted into the receiving groove. A notch 9 is opened in the middle of the bottom end of the wooden column 8 with a rectangular cross - section. The notch 9 is used to accommodate the clamping plate member and the friction member. The top surface of the friction member is in frictional contact with the bottom end of the wooden column 8 with a rectangular cross - section. The column shoe 1, the clamping plate member, and the friction member are all detachably connected to the wooden column 8 with a rectangular cross - section.

[0029] In this embodiment, bolt holes are opened in the column shoe 1, the clamping plate member, and the friction member. By sequentially passing bolts 7 through the above - mentioned bolt holes, detachable connection is achieved, which is convenient for on - site assembly at the construction site.

[0030] The friction member plate can dissipate seismic energy. At the same time, through the arranged reset assembly, when an earthquake occurs, damping can be generated to force the wooden column 8 with a rectangular cross - section to slowly lift. After the earthquake ends, the reset assembly can reset the wooden column 8 with a rectangular cross - section, thereby improving the seismic performance of the wooden column 8 with a rectangular cross - section.

[0031] Furthermore, the column shoe 1 includes two sets of oppositely arranged shoe sleeves. The two sets of shoe sleeves enclose to form a receiving groove. The shoe sleeve includes a bottom plate 18. One side of the top end of the bottom plate 18 is vertically connected with a U - shaped plate 19. A rib plate is connected between the bottom plate 18 and the U - shaped plate 19. The openings of the U - shaped plates 19 on the two sets of shoe sleeves are arranged oppositely.

[0032] By arranging the openings of the two U - shaped plates 19 oppositely to form a receiving groove matching the wooden column 8 with a rectangular cross - section, and connecting the clamping plate member between the two U - shaped plates 19 to form an I - shaped structure, the structural stability of the column shoe 1 is further improved and the connection strength is increased. Through the notch 9 on the wooden column 8 with a rectangular cross - section, the clamping plate member is pre - clamped in the notch 9, which is convenient for on - site installation and positioning. Subsequently, the bolts 7 are sequentially passed through the bolt holes on one side of the U - shaped plate 19, the bolt holes on the clamping plate member and the friction member, and finally through the bolt holes on the U - shaped plate 19 on the other side of the wooden column 8 with a rectangular cross - section and the nuts are tightened to complete the assembly. Specifically, two bolt holes one 14 are opened on both opposite sides of the U - shaped plate 19, and the aperture of the bolt hole one 14 is 14 mm.

[0033] Furthermore, the clamping plate member includes two vertical plates 17 fixedly connected to the opposite sides of the column shoe 1. The two vertical plates 17 are arranged in parallel and form a gap.

[0034] The top end of the friction member can be clamped in the gap formed by the arranged gap. At the same time, the friction member is fixed on the foundation 10 to perform lateral limit on the wooden column 8 with a rectangular cross - section. Four bolt holes two 15 are opened on the two vertical plates 17, and the aperture of the four bolt holes two 15 is 14 mm.

[0035] Further, the friction member is the T-shaped friction plate 2.

[0036] Specifically, the T-shaped friction plate 2 is composed of a horizontal plate and a vertical plate welded together. The vertical plate is perpendicularly located in the middle of the horizontal plate. Four bolt holes five 13 are provided in the vertical plate, and the four bolt holes five 13 are arranged corresponding to the bolt holes two 15. The aperture of the four bolt holes five 13 is 30 mm, which is larger than the bolt holes two 15 and the screw holes one, for the bolt 7 to pass through. This ensures relative displacement between the T-shaped friction plate 2 and other components.

[0037] Further, the reset assembly includes a disc spring 5. A plurality of anchor bolts two 4 are embedded in the foundation 10. A plurality of bolt holes three 16 are provided on the bottom plate 18. The plurality of bolt holes three 16 are arranged corresponding to the plurality of anchor bolts two 4 one by one. The top ends of the anchor bolts two 4 sequentially pass through the bolt holes three 16, the disc spring 5 and are threadedly connected with nuts, and the nuts are used to compress the disc spring 5.

[0038] During an earthquake, first, the disc spring 5 generates compression to lift the column foot of the rectangular-section wooden column 8 to reduce the seismic action of the structure. After the earthquake, the structure automatically resets under the vertical load and the pre-tightening force of the disc spring 5 to achieve the reset mechanism. After the earthquake, the damaged components are replaced or the nuts are re-tightened to achieve the repair mechanism and the replacement mechanism, thereby improving the seismic performance of the wooden column.

[0039] Further, a plurality of anchor bolts one 3 are also embedded in the foundation 10. A plurality of bolt holes four 12 are provided on the horizontal plate of the T-shaped friction plate 2. The plurality of bolt holes four 12 are arranged corresponding to the plurality of anchor bolts one 3 one by one. The top ends of the plurality of anchor bolts one 3 pass through the bolt holes four 12 and are tightened with nuts.

[0040] It should be noted that both the anchor bolts one 3 and the anchor bolts two 4 are integrally cast with the foundation 10 through concrete.

[0041] In this embodiment, there are four bolt holes four 12, which are symmetrically arranged on both sides of the vertical plate respectively. The aperture of the bolt holes four 12 is 14 mm. The number of the anchor bolts one 3 is four and they are arranged corresponding to the bolt holes four 12. During assembly, align the four bolt holes four 12 with the four anchor bolts one 3 respectively, then slowly lower the T-shaped friction plate 2, and sequentially tighten the nuts of the anchor bolts one 3 to achieve the firm fixation of the T-shaped friction plate 2.

[0042] Further, a number of steel pads 6 are inserted between the side wall of the rectangular-section wooden column 8 and the U-shaped plate 19. The top ends of the steel pads 6 are slightly higher than the U-shaped plate 19 to disperse the local stress at the contact part between the U-shaped plate 19 and the rectangular-section wooden column 8.

[0043] Furthermore, two vertical grooves are opened on the side of the U-shaped plate 19 close to the rectangular-section wooden column 8. The steel backing plate 6 is inserted between the side wall of the rectangular-section wooden column 8 and the U-shaped plate 19 through the vertical grooves, and both sides of the steel backing plate 6 are respectively abutted against the side wall of the rectangular-section wooden column 8 and the inner wall of the vertical grooves.

[0044] After the earthquake, the repair mechanism and replacement mechanism are realized by replacing the damaged components or re-tightening the bolts, thereby improving the seismic performance of the wooden column. The weather resistance and creep resistance of the steel form a protective barrier, reducing the influence of the change in environmental humidity on the cyclic stress of the rectangular-section wooden column 8, delaying the fatigue damage process of the rectangular-section wooden column 8, and improving the durability of the rectangular-section wooden column 8.

[0045] Through the rigid medium conversion of the steel-wood contact surface by the steel backing plate 6, the traditional wood-wood friction interface is upgraded to a steel-wood friction system, and the friction coefficient is increased by 3-5 times, effectively resisting lateral slip and enhancing the overall lateral displacement stability of the structure.

[0046] For the prefabricated friction self-centering wooden column foot node provided by the present invention, the construction method is as follows:

[0047] (1) First, on-site, the anchor bolt 1-3 and the anchor bolt 2-4 are integrally cast with the concrete foundation 10. After the concrete reaches the strength, the anchor bolt 1-3 is used to connect and fasten the T-shaped friction plate 2 and the foundation 10 through the bolt hole 4-12 on the T-shaped friction plate. Subsequently, the vertical plate of the T-shaped friction plate 2 is inserted between the two vertical plates 17 on the column shoe 1 for pre-installation. Then, the bolt hole 3-16 on the bottom plate 18 is aligned with the anchor bolt 2-4, and the column shoe 1 slowly drops. The disc spring 5 combination is sequentially sleeved on the anchor bolt 2-4, and the nuts are tightened.

[0048] (2) Place the rectangular-section wooden column 8 in the middle of the column shoe 1, and embed the T-shaped friction plate 2 and the two vertical plates 17 together in the notch 9 at the bottom end of the rectangular-section wooden column 8. Use the bolt 7 to pass through the bolt hole 1-14, the bolt hole 6-11 opened on the rectangular-section wooden column 8, the bolt hole 2-15, and the bolt hole 5-13, and finally extend out of the bolt hole 1-14 on the other side of the U-shaped plate 19, and then tighten the nut to complete the connection. Subsequently, insert the steel backing plate 6 into the vertical groove of the U-shaped plate 19.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0050] The above are only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application.

Claims

1. An assembled friction self-centering wooden column foot node, characterized in that It includes a foundation (10), on which a column shoe (1) is detachably connected, and a reset component is provided at the connection between the column shoe (1) and the foundation (10). The receiving groove of the column shoe (1) is of a rectangular structure. A clamping plate member is provided in the middle of the receiving groove. A friction member is provided in the gap of the clamping plate member, and the friction member is detachably connected to the foundation (10). A wooden column (8) with a rectangular cross-section is inserted into the receiving groove. A notch (9) is opened in the middle of the bottom end of the wooden column (8) with a rectangular cross-section. The notch (9) is used to accommodate the clamping plate member and the friction member. The top surface of the friction member is in frictional contact with the bottom end of the wooden column (8) with a rectangular cross-section. The column shoe (1), the clamping plate member, and the friction member are all detachably connected to the wooden column (8) with a rectangular cross-section.

2. The prefabricated friction self-centering wooden column base joint according to claim 1, wherein The column shoe (1) includes two sets of oppositely arranged shoe sleeves. The two sets of shoe sleeves enclose to form the receiving groove. The shoe sleeve includes a bottom plate (18). One side of the top end of the bottom plate (18) is vertically connected with a U-shaped plate (19). A rib plate is connected between the bottom plate (18) and the U-shaped plate (19). The U-shaped plates (19) on the two sets of shoe sleeves are arranged with their openings facing each other.

3. The prefabricated friction self-centering wooden column base joint according to claim 1, characterized in that, The clamping plate member includes two vertical plates (17) fixedly connected to the opposite sides of the column shoe (1). The two vertical plates (17) are arranged in parallel and form the gap.

4. The fabricated friction self-centering wood column base joint according to claim 1, wherein, The friction member is a T-shaped friction plate (2).

5. The prefabricated friction self-centering wooden column base joint according to claim 2, characterized in that, The reset component includes a disc spring (5). A plurality of anchor bolts two (4) are pre-embedded on the foundation (10). A plurality of bolt holes three (16) are opened on the bottom plate (18). The plurality of bolt holes three (16) are arranged in one-to-one correspondence with the plurality of anchor bolts two (4). The top end of the anchor bolt two (4) sequentially passes through the bolt hole three (16), the disc spring (5) and is threadedly connected with a nut. The nut is used to compress the disc spring (5).

6. The prefabricated friction self-centering wooden column base joint according to claim 4, characterized in that A plurality of anchor bolts one (3) are also pre-embedded on the foundation (10). A plurality of bolt holes four (12) are opened on the transverse plate of the T-shaped friction plate (2). The plurality of bolt holes four (12) are arranged in one-to-one correspondence with the plurality of anchor bolts one (3). The top ends of the plurality of anchor bolts one (3) pass through the bolt holes four (12) and are tightened with nuts.

7. The prefabricated friction self-centering wooden column base joint according to claim 2, characterized in that, A plurality of steel pads (6) are inserted between the side wall of the wooden column (8) with a rectangular cross-section and the U-shaped plate (19). The top ends of the steel pads (6) extend outside the U-shaped plate (19).

8. The prefabricated friction self-centering wooden column foot node according to claim 7, characterized in that, Two vertical grooves are opened on one side of the U-shaped plate (19) close to the wooden column (8) with a rectangular cross-section. The steel pads (6) are inserted between the side wall of the wooden column (8) with a rectangular cross-section and the U-shaped plate (19) through the vertical grooves. The two sides of the steel pads (6) are respectively abutted against the side wall of the wooden column (8) with a rectangular cross-section and the inner wall of the vertical groove.

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