CN109853736B - Recoverable friction energy dissipation wood structure beam-column joint with steel clamping plates - Google Patents
Recoverable friction energy dissipation wood structure beam-column joint with steel clamping plates Download PDFInfo
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- CN109853736B CN109853736B CN201910044622.7A CN201910044622A CN109853736B CN 109853736 B CN109853736 B CN 109853736B CN 201910044622 A CN201910044622 A CN 201910044622A CN 109853736 B CN109853736 B CN 109853736B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 124
- 239000010959 steel Substances 0.000 title claims abstract description 124
- 239000002023 wood Substances 0.000 title claims abstract description 85
- 230000021715 photosynthesis, light harvesting Effects 0.000 title claims abstract description 36
- 238000003466 welding Methods 0.000 claims abstract description 4
- 229910001369 Brass Inorganic materials 0.000 claims description 4
- 239000010951 brass Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 abstract description 11
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Abstract
A recoverable friction dissipative wood structural beam-column joint with steel splints comprising: channel steels respectively positioned at the front and rear sides of the end part of the wood beam; steel clamping plates respectively positioned on the front and rear outer surfaces of the channel steel; square gaskets are respectively positioned on the outer surfaces of the steel clamping plates; an energy-consumption friction plate I is arranged, the steel clamping plate is positioned between the outer surface of the channel steel and the inner surface of the steel clamping plate; the energy dissipation friction plate II is positioned between the outer surface of the steel clamping plate and the square gasket; the beam column connecting piece is a rectangular frame structure formed by welding two horizontal steel plates and two vertical steel plates and is arranged between the end part of the wood beam and the wood column; the steel strand is fixedly connected with the wood beam through an anchorage device by traversing one vertical surface of the beam column connecting piece; and corresponding connecting bolts. The invention can strengthen the stable energy consumption capability of the node, improve the bearing capability of the pin groove at the beam end, prevent the brittle failure of transverse lines, be beneficial to the exertion of the wood strength and enable the node to recover the initial state after the earthquake. The invention has simple force transmission, large initial rigidity, large bending rigidity and self-resetting performance.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a recoverable friction energy dissipation wood structure beam-column joint with steel splints.
Background
Currently, in wood beam column structural systems, most adopt the form of bolted joints. A common form is steel splints bolted connections, which form of joints mainly uses the bending resistance of the bolts and the localized bearing of the timber at the bolts to provide load bearing capacity. This node form has mainly several problems:
(1) Because of construction deviation, a gap exists between the wall of the bolt hole on the wood beam and the bolt, and the gap causes the wood beam to slide after being stressed, so that the initial rigidity of the node is lower.
(2) Because the tensile strength of the wood transverse lines is low, when the bolt holes and the bolt grooves bear pressure, brittle fracture such as beam end transverse line splitting often occurs, the bending resistance of the wood cannot be fully exerted, and the overall bearing capacity of the wood structure beam column system is reduced.
(3) The bearing capacity is provided through the modes of bolt yielding, compression yielding of timber at the bolt hole and the like, and after earthquake, larger residual deformation exists, so that the earthquake resistance is reduced.
Therefore, in view of the above problems, there is an urgent need for a form of a wood structure beam-column bolted joint that has a large initial rigidity, a large bending rigidity, and a small residual deformation.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a recoverable friction energy consumption wood structure beam-column joint with steel clamping plates, so that the wood structure beam-column joint has larger initial rigidity, bending rigidity and smaller residual deformation.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a recoverable friction dissipative wood structural beam-column joint with steel splints comprising:
channel steels 5 are respectively positioned at the front and rear sides of the end part of the wood beam 2;
steel clamping plates 4 respectively positioned on the front and rear outer surfaces of the channel steel 5;
the square gaskets 8 are respectively positioned on the outer surfaces of the steel clamping plates 4;
the energy dissipation friction plate I14 is positioned between the outer surface of the channel steel 5 and the inner surface of the steel clamping plate 4;
the energy dissipation friction plate II 15 is positioned between the outer surface of the steel clamping plate 4 and the square gasket 8;
the first bolt 7 is connected with the square gasket 8, the second energy dissipation friction plate 15, the steel clamping plate 4, the first energy dissipation friction plate 14, the channel steel 5 and the wood beam 2;
the beam column connecting piece 9 is a rectangular frame structure formed by welding two horizontal steel plates and two vertical steel plates and is arranged between the end part of the wood beam 2 and the wood column 1;
the steel strand 3 is fixedly connected with the wood beam 2 through an anchor 12 by traversing one vertical surface of the beam column connecting piece 9;
and a second bolt 10 is used for connecting the other vertical surface of the beam column connecting piece 9 and the wood column 1.
The channel steels 5 respectively positioned at the front and rear sides of the end part of the wood beam 2 are jointed at the upper and lower sides of the end part of the wood beam 2.
The energy dissipation friction plate I14 and the energy dissipation friction plate II 15 are square brass sheets with the thickness of 2 mm.
Steel clamping plate 4 and beam column the connection 9 is welded.
The upper and lower surfaces of the beam column connecting piece 9 are flush with the upper and lower surfaces of the wood beam 2.
The outer side surface of the wood column 1 is provided with a backing plate 13, and a second bolt 10 sequentially penetrates through the other vertical surface of the beam column connecting piece 9, the wood column 1 and the backing plate 13 to realize connection.
The square gasket 8 size is 90mm x 8mm, the aperture of the bolt hole on the steel splint 4 is 50mm, the aperture of the bolt hole on the square gasket 8, the energy dissipation friction plate II 15, the energy dissipation friction plate I14, the channel steel 5 and the wood beam 2 is greater than 1mm in diameter of the bolt, and the bolt I7 passes through each bolt hole to realize connection.
The first bolt 7 penetrates into the wood beam 2 and then applies prestress.
The steel strand 3 is prestressed after penetrating into the wood beam 2.
The beam column connecting piece 9 is also provided with a middle vertical steel plate, the top surface of the middle vertical steel plate is welded with the upper horizontal steel plate of the beam column connecting piece 9, and the bottom surface is welded with the lower horizontal steel plate of the beam column connecting piece 9.
And a 4mm gap exists between the flanges of the channel steel 5.
Compared with the prior art, the invention has the beneficial effects that:
1. after the bolts apply prestress, the square gaskets compress the steel clamping plates, the steel clamping plates compress the channel steel, and after the square gaskets, the steel clamping plates and the energy-consumption friction plates arranged in the middle of the channel steel are subjected to pressure, friction force generated by the pressure is used for shearing resistance, and increase and decrease of the compressive stress is used for bending resistance; after the steel strand is prestressed, the contact surface of the beam-column connecting piece and the wood beam is compressed, and the steel strand is sheared by friction force generated by pressure and bent by increasing and decreasing tensile stress;
2. on the steel splint, utilize the screw aperture that is greater than the bolt diameter far away, make the wood beam can rotate, and take place to rotate the in-process bolt can not touch the bolt pore wall, avoid the bolt to receive the destruction mode of bending yield.
3. And larger bolt holes are reserved on the steel clamping plates, so that the wood beam can rotate, a large amount of earthquake energy is dissipated through the sliding friction force on the energy dissipation friction plate and the self-resetting capability provided by the steel stranded wires, and the damage degree of the earthquake to the building structure is reduced.
4. And due to the introduction of the channel steel, transverse grain splitting is avoided when the wood beam pin grooves are pressed.
Drawings
FIG. 1 is a schematic view of a recoverable friction dissipative wood structural beam-column joint with steel cleats.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a front view of fig. 1.
Fig. 4 is a sectional view a-a of fig. 3.
Fig. 5 is a sectional view of fig. 3B-B.
Fig. 6 is a schematic view of a steel splint.
Reference numerals in the drawings: 1 is a wood column, 2 is a wood beam, 3 is a steel stranded wire, 4 is a steel clamping plate, 5 is a channel steel, 6 is a first nut, 7 is a first bolt, 8 is a square gasket, 9 is a beam column connecting piece, 10 is a second bolt, 11 is a second nut, 12 is an anchorage device, 13 is a base plate, 14 is a first energy dissipation friction plate, and 15 is a second energy dissipation friction plate.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1, 2, 3, 4, 5 and 6, a recoverable friction energy dissipating wood structure beam-column joint of a steel strip clamping plate of the present invention comprises:
the channel steel 5 is provided with 4mm gaps between flanges, and 2 gaps are respectively arranged at the front and rear sides of the end part of the wood beam 2 and are sewn at the upper and lower sides of the end part of the wood beam 2;
the steel clamping plates 4 are respectively positioned on the outer surfaces of 2 channel steels 5, and are provided with bolt holes with the aperture of 50 mm;
the square gaskets 8 are 90mm multiplied by 8mm in size, 8 gaskets are respectively positioned on the outer surfaces of 2 steel clamping plates 4, 4 gaskets are distributed on the outer surface of each steel clamping plate 4, and the gaskets are connected to form a rectangle;
the energy consumption friction plates I14 are 2 brass plates with the thickness of 2mm and are respectively positioned between the outer surface of each channel steel 5 and the inner surface of the steel clamping plate 4;
the second energy consumption friction plate 15 is a square brass sheet with the thickness of 2mm, and is provided with 8 friction plates which are respectively positioned between the outer surface of each steel clamping plate 4 and the square gasket 8;
the square gasket 8, the energy dissipation friction plate II 15, the energy dissipation friction plate I14, the channel steel 5 and the wood beam 2 are respectively provided with bolt holes with the aperture larger than 1mm of the diameter of the bolt.
The first bolts 7, the diameter of which is 18mm, sequentially penetrate through the bolt holes, connect the square gaskets 8, the second energy dissipation friction plates 15, the steel clamping plates 4, the first energy dissipation friction plates 14, the channel steel 5, the wood beam 2 and the channel steel 5, the first energy dissipation friction plates 14, the steel clamping plates 4, the second energy dissipation friction plates 15 and the square gaskets 8 on one side, and apply prestress;
the beam column connecting piece 9 is a rectangular frame structure formed by welding two horizontal steel plates and two vertical steel plates and is arranged between the end part of the wood beam 2 and the wood column 1, wherein the upper surface and the lower surface of the beam are level with the upper surface and the lower surface of the wood beam 2;
the steel strand 3 is fixedly connected with the wood beam 2 through an anchor 12 and is used for applying prestress, and a vertical surface (the vertical surface can be welded with the steel clamping plate 4) of the beam column connecting piece 9 is traversed;
a backing plate 13 arranged on the outer side surface of the wood column 1,
the second bolt 10, the diameter of which is 20mm, passes through the other vertical surface of the beam column connecting piece 9, the wood column 1 and the backing plate 13 in sequence to realize connection.
In the present invention, the bolts 7, the square washers 8 and the nuts 6 are not fixed in the above number, but may be determined depending on the number of design screw holes on the beam-column connection nodes.
During implementation, the steel strand 3 penetrates through a reserved hole of the wood beam 2, the channel steel 5 is assembled at a designated position of a beam end, the energy dissipation friction plate I14 is stuck at the designated position of the outer surface of the channel steel 5, then the beam column connecting piece 9 is connected to the wood column 1 through the bolt II 10, the nut II 11 is screwed down, the wood beam 2 is placed in the designated position of the steel clamping plate 4, the steel strand 3 is tensioned through the anchorage 12, the wood beam 2 and the beam column connecting piece 9 are connected, the energy dissipation friction plate II 15 is stuck on the square gasket 8, the bolt I7 sequentially penetrates through the square gasket 8, the steel clamping plate 4, the channel steel 5 and bolt holes in the wood beam 2, and the bolt I7 and the tensioning nut I6 are screwed down.
The principle of the invention is as follows:
a channel steel 5 is assembled at the end of the wood beam 2, constraining the transverse lines of the pin grooves to split when the pin grooves are pressed; the square gasket 8 presses the steel clamping plate 4 by utilizing the pre-tightening force provided by the pre-stressing bolt I7, the steel clamping plate 4 presses the channel steel 5, the square gasket 8, the steel clamping plate 4, the channel steel 5, the energy dissipation friction plate I14 and the energy dissipation friction plate II 15 are subjected to pressure, and the square gasket is sheared by friction force generated by the pressure and is bent by increasing or decreasing of the pressure stress; after the prestress is applied to the steel strand 3, the contact surface of the wood beam 2 and the beam column connecting piece 9 is pressed, the shearing resistance is realized by the friction force generated by the pressure, and the bending resistance is realized by the increase and decrease of the tensile stress. In an earthquake, the wood beam 2 can rotate by utilizing larger hole bolt holes reserved on the steel clamping plates 4, so that a large amount of earthquake energy is dissipated through the sliding friction force on the energy dissipation friction plate I14 and the energy dissipation friction plate II 15 and the self-resetting capability provided by the steel stranded wires 3, and the damage degree of the earthquake to a building structure is reduced.
According to the invention, the channel steel is connected with the end part of the wood beam through the bolts, so that the transverse grain compression resistance of the pin groove at the beam end is improved; the energy-consumption friction plates are arranged between the outer surface of the channel steel and the inner surface of the steel clamping plate and between the outer surface of the steel clamping plate and the inner surface of the square gasket, and the friction force generated by pressure is utilized to resist shearing and the increase and decrease of compressive stress is utilized to resist bending; the prestress steel strand is utilized to generate pressure on the contact surface of the wood beam end surface and the wood column side surface, the friction force generated by the pressure is utilized to resist shearing, and the increase and decrease of tensile stress is utilized to resist bending. The invention avoids the influence of various gaps at the joints on the stress performance and rigidity of the structure; the energy consumption friction plate is introduced, so that the stable energy consumption capability of the node can be enhanced; the introduction of the channel steel can improve the bearing capacity of the pin grooves at the beam ends, prevent the brittle fracture of transverse lines and be beneficial to exerting the strength of wood; in addition, the steel strand enables the post-earthquake node to recover to an initial state. Compared with the prior wood structure beam column joint, the invention has the advantages of simple force transmission, high initial rigidity, high bending rigidity and self-resetting performance (small post-earthquake residual deformation).
Claims (7)
1. A recoverable friction energy dissipation wood structure beam-column joint with steel clamping plates, characterized in that the channel steels (5) respectively positioned at the front and rear of the end of the wood beam (2) are jointed at the upper and lower sides of the end of the wood beam (2), comprising:
the channel steels (5) are respectively positioned at the front and rear sides of the end part of the wood beam (2);
the steel clamping plates (4) are respectively positioned on the front outer surface and the rear outer surface of the channel steel (5);
the square gaskets (8) are respectively positioned on the outer surfaces of the steel clamping plates (4);
the energy dissipation friction plate I (14) is positioned between the outer surface of the channel steel (5) and the inner surface of the steel clamping plate (4);
the energy dissipation friction plate II (15) is positioned between the outer surface of the steel clamping plate (4) and the square gasket (8);
the first bolt (7) is connected with the square gasket (8), the second energy dissipation friction plate (15), the steel clamping plate (4), the first energy dissipation friction plate (14), the channel steel (5) and the wood beam (2);
the beam column connecting piece (9) is of a rectangular frame structure formed by welding two horizontal steel plates and two vertical steel plates, is arranged between the end part of the wood beam (2) and the wood column (1), and is welded with the beam column connecting piece (9), and the upper surface and the lower surface of the beam column connecting piece (9) are flush with the upper surface and the lower surface of the wood beam (2);
the steel strand (3) is fixedly connected with the wood beam (2) through an anchorage device (12) by traversing one vertical surface of the beam column connecting piece (9);
and the second bolt (10) is used for connecting the other vertical surface of the beam column connecting piece (9) with the wood column (1).
2. The recoverable friction dissipative wood structural beam-column joint of a steel strip clamp according to claim 1, wherein the dissipative friction disks one (14) and two (15) are 2mm thick square brass sheets.
3. The recoverable friction energy dissipation wood structure beam-column joint of the strip steel clamping plate according to claim 1, wherein a backing plate (13) is arranged on the outer side face of the wood column (1), and a bolt II (10) sequentially penetrates through the other vertical face of the beam-column connecting piece (9), the wood column (1) and the backing plate (13) to achieve connection.
4. The recoverable friction energy dissipation wood structure beam-column joint of a steel clamping plate according to claim 1, wherein the size of the square gasket (8) is 90mm x 8mm, the aperture of the bolt hole on the steel clamping plate (4) is 50mm, the aperture of the bolt hole on the square gasket (8), the energy dissipation friction plate two (15), the energy dissipation friction plate one (14), the channel steel (5) and the wood beam (2) is larger than the diameter of the bolt by 1mm, and the bolt one (7) passes through each bolt hole to realize connection.
5. The recoverable friction dissipative wood structure beam-column joint of a steel strip clamp according to claim 1, wherein, the first bolt (7) penetrates into the wood beam (2) and then applies prestress, and the steel strand (3) penetrates into the wood beam (2) and then applies prestress.
6. The recoverable friction energy dissipating wood beam-column joint of band steel clamp plate according to claim 1, wherein there is also one middle vertical steel plate in the beam-column connector (9), the top surface of the middle vertical steel plate is welded with the upper horizontal steel plate of the beam-column connector (9), and the bottom surface is welded with the lower horizontal steel plate of the beam-column connector (9).
7. The recoverable friction dissipative wood structure beam-column joint of a steel strip clamp according to claim 1, wherein 4mm gap exists between the flanges of the channel (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910044622.7A CN109853736B (en) | 2019-01-17 | 2019-01-17 | Recoverable friction energy dissipation wood structure beam-column joint with steel clamping plates |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910044622.7A CN109853736B (en) | 2019-01-17 | 2019-01-17 | Recoverable friction energy dissipation wood structure beam-column joint with steel clamping plates |
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| CN109853736A CN109853736A (en) | 2019-06-07 |
| CN109853736B true CN109853736B (en) | 2023-12-19 |
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| CN201910044622.7A Active CN109853736B (en) | 2019-01-17 | 2019-01-17 | Recoverable friction energy dissipation wood structure beam-column joint with steel clamping plates |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110565814A (en) * | 2019-08-29 | 2019-12-13 | 郑州大学 | Wood structure building beam and shear wall connecting node structure and construction method thereof |
| CN113668895A (en) * | 2021-09-10 | 2021-11-19 | 郑州大学 | Be used for reinforced (rfd) power consumption sparrow of timber beams post connected node |
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| CN209538390U (en) * | 2019-01-17 | 2019-10-25 | 西安建筑科技大学 | A kind of recoverable friction energy-dissipating timber structure beam-column joint of strip clamping plate |
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2019
- 2019-01-17 CN CN201910044622.7A patent/CN109853736B/en active Active
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| CN102251588A (en) * | 2011-05-18 | 2011-11-23 | 何敏娟 | Bolted steel filling plate-sleeve connection node for beam-post wood structure |
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| GB201709336D0 (en) * | 2017-06-12 | 2017-07-26 | Eqrbs Ltd | A joint |
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| 预应力方套管连接胶合木梁柱节点抗弯试验;赵艺;何敏娟;马人乐;;同济大学学报(自然科学版)(08);全文 * |
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