CN107217866B - Wood structure mortise and tenon joint of device shape memory alloy wire - Google Patents
Wood structure mortise and tenon joint of device shape memory alloy wire Download PDFInfo
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- CN107217866B CN107217866B CN201710586489.9A CN201710586489A CN107217866B CN 107217866 B CN107217866 B CN 107217866B CN 201710586489 A CN201710586489 A CN 201710586489A CN 107217866 B CN107217866 B CN 107217866B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
- E04B1/2604—Connections specially adapted therefor
- E04B2001/2676—Connector nodes
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G2023/0248—Increasing or restoring the load-bearing capacity of building construction elements of elements made of wood
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a wood structure mortise-tenon joint for arranging shape memory alloy wires, which comprises a wood column and a wood beam connected with the wood column through the mortise-tenon joint, wherein a plurality of shape memory alloy wires with the same number and the same diameter are respectively connected between the wood column and the wood beam at the mortise-tenon joint up and down, one ends of the shape memory alloy wires are respectively fixed on the upper end face and the lower end face of the wood beam through horizontal steel plate connecting pieces, and the other ends of the shape memory alloy wires are respectively fixed on the inner sides of the upper cylindrical surface and the lower cylindrical surface of the wood column through wood column clamp connecting pieces; the shape memory alloy wires are vertically symmetrical along the axis of the wood beam, and when the mortise and tenon joint repeatedly rotates, the shape memory alloy wires repeatedly stretch and reset to bear the internal force of the wood column and the wood beam. The shear bearing capacity and the bending bearing capacity of the mortise and tenon joint of the reinforced wood structure are obviously improved, the energy consumption capacity is also obviously improved, and the reinforced wood structure can be recovered after earthquake without residual deformation; has good durability, corrosion resistance and fatigue resistance.
Description
Technical Field
The invention relates to an ancient building with shape memory alloy wires and a modern wood structure mortise-tenon joint, belonging to the field of reinforcing protection, earthquake resistance and disaster reduction of the ancient building wood structure and the modern wood structure. Is suitable for the earthquake-resistant and disaster-reducing requirements of the traditional wood structure and the modern wood structure.
Background
The history of the wood structure of the ancient Chinese architecture is long, and precious traditional building skills and building culture are contained in the ancient Chinese architecture. The existing ancient architecture comprises Beijing palace, woodtower in Shanxi Ying county, de-Dou mountain village, temple in thrips county and the like. The connection mode of the ancient building wood structure beam column is mainly mortise-tenon connection, namely, the beam end is made into a tenon form, and the column end is made into a mortise form. The mortise-tenon joint has the functions of hardness and softness and is typical semi-rigid connection. Under the action of earthquake and wind load, the mortise and tenon joints are extruded and deformed, tenons are loosened and even pulled out, and the basic bearing capacity of bending, shearing, twisting and the like is weakened. Most of modern wood structure connection modes adopt steel connection pieces to connect or adopt mortise and tenon joint to connect partially, but the connection is weaker, the bending rigidity is smaller, and the wood structure connection mode belongs to semi-rigid connection. The node construction mode of the wood structure causes the defect of insufficient overall lateral rigidity of the wood structure, and under the action of power loads such as earthquake, crosswind and the like, the overall structure easily generates stronger power response and larger interlayer lateral movement, thereby causing serious damage and even collapse of the structure. Therefore, reinforcing the mortise and tenon joints to reduce the overall dynamic response of the wood frame and limit interlayer lateral movement is an important point for repairing and reinforcing the wood structure.
The existing common reinforcing materials for the mortise and tenon joints of the wood structure are various, such as traditional materials of steel plates, angle steels, cramps and the like, and novel materials of mild steels, carbon fibers and the like. On one hand, although the bearing capacity and the energy consumption performance of the mortise and tenon joint of the traditional material reinforced wood structure such as steel plates, angle steel, cramps and the like can be improved, the bending rigidity of the mortise and tenon joint can be greatly improved, so that the rigidity of the whole structure is increased, the earthquake reflection is greatly increased, and the earthquake resistance is not facilitated; on the other hand, the traditional materials such as steel plates, angle steels, cramps and the like are easy to generate durability problems such as rust, corrosion and the like after being exposed to the air for a long time, potential safety hazards are hidden, and the beautiful appearance of the building is influenced; furthermore, as the materials such as the steel plate, the angle steel, the cramp, the mild steel and the like belong to elastoplastic materials, after the structure experiences a large earthquake effect, the materials can generate large residual deformation and can not be restored to the initial state, and the structure is secondarily reinforced by replacing reinforcing materials. The carbon fiber cloth is a unidirectional carbon fiber reinforced product and has stronger tensile bearing capacity, but because the material can only bear tensile force, the shearing bearing capacity of the material in the vertical fiber direction is almost zero, so that the carbon fiber cloth is adopted to reinforce the mortise and tenon joint, and the bending bearing capacity and the bending rigidity of the mortise and tenon joint can only be improved, and the shearing bearing capacity of the mortise and tenon joint cannot be improved; in addition, the carbon fiber cloth has strong brittleness and poor ductility, and the purpose of improving the energy consumption capacity of the joint cannot be achieved by reinforcing the mortise and tenon joint by the carbon fiber cloth; in addition, the carbon fiber cloth and the binder thereof belong to inflammables, have extremely poor fireproof performance, are easy to burn or seriously deform under the condition of open fire or high temperature, and cannot be used continuously.
Therefore, it is necessary to adopt a novel intelligent material to reinforce the ancient building timber structure and the modern timber structure mortise and tenon joint, and the shape memory alloy is a novel functional material with various special mechanical properties, and has obvious shape memory effect, phase change superelasticity and high damping characteristic. Compared with other materials, the shape memory alloy has good fatigue resistance and large recoverable strain (6% -8%). Therefore, compared with the reinforcing methods of other materials, the method has the characteristics of deformation and automatic recovery, has higher damping energy consumption capacity, and is an effective scheme for reducing the damage of a building structure under the action of an earthquake and reducing the cost of repairing the structure or repairing and replacing reinforcing materials after the earthquake.
Disclosure of Invention
In order to solve the defects or shortcomings in the background art, the invention aims to provide an ancient building with a shape memory alloy wire and a modern wood structure mortise-tenon joint, and solve the problems of super rigidity, poor durability, large residual deformation, poor fire resistance and the like in the existing mortise-tenon joint reinforcing mode. The mortise and tenon joint is reinforced by adopting the austenitic shape memory alloy wires, so that the energy consumption capability, the durability and the fire resistance of the joint are greatly improved under the condition that the bending rigidity of the mortise and tenon joint is not obviously improved, the automatic resetting of the whole structure after deformation can be realized, and the congenital defect of poor self-recovery capability of the mortise and tenon joint is further improved. Therefore, the problems of building inclination, collapse and the like caused by dynamic response generated by earthquake, wind vibration or mechanical vibration are solved, and secondary correction and reinforcement after the building is vibrated are avoided.
The invention is realized by the following technical scheme.
The wood structure mortise-tenon joint of the shape memory alloy wire comprises a wood column and a wood beam connected with the wood column through the mortise-tenon joint, wherein a plurality of shape memory alloy wires with the same number and the same diameter are respectively connected between the wood column and the wood beam at the mortise-tenon joint up and down, one ends of the shape memory alloy wires are respectively fixed on the upper end face and the lower end face of the wood beam through horizontal steel plate connecting pieces, and the other ends of the shape memory alloy wires are respectively fixed on the inner sides of the upper cylindrical surface and the lower cylindrical surface of the wood column through wood column clamp connecting pieces; the shape memory alloy wires are vertically symmetrical along the axis of the wood beam, and when the mortise and tenon joint repeatedly rotates, the shape memory alloy wires repeatedly stretch and reset to bear the internal force of the wood column and the wood beam.
Preferably, the horizontal steel plate connecting piece comprises horizontal steel plates respectively distributed on the wood beam and vertical screws connected with the horizontal steel plates, and the horizontal steel plates are respectively provided with a rotary round shaft supported by a bearing support and a plurality of adjustable pre-strain devices connected by the vertical steel plates.
Further, the adjustable pre-strain device comprises a plurality of screw rods penetrating through the vertical steel plate, nuts fixing the screw rods and adjusting bolts connected with the screw rods, and the adjusting bolts are vertically distributed along the screw rods.
Further, the rotary round shaft is connected to the bearing support, and the rotary round shaft is provided with grooves with the same number as the shape memory alloy wires, and the grooves can limit the displacement of the shape memory alloy wires.
Further, the vertical screw rod penetrates through the elliptical holes of the horizontal steel plate, and the elliptical holes are distributed on the two sides of the bearing support of the horizontal steel plate and the vertical steel plate.
Preferably, the wood column clamp connector comprises a pair of arc-shaped steel plates connected to the wood column and bolts connected with the arc-shaped steel plates, and a horizontal screw rod supported by a square steel plate is arranged on the arc-shaped steel plate on the inner side of the wood column.
Further, the horizontal screw is uniformly distributed with flange nut pairs with the same number as the shape memory alloy wires, and each pair of flange nuts is used for fixing the shape memory alloy wires.
Furthermore, one end of the shape memory alloy wires penetrates through the groove below the rotary circular shaft and is connected to the adjustable pre-strain device in a specific connection mode that one end of each shape memory alloy wire penetrates through the fixing screw to be fixed on the adjusting screw, and the other end of each shape memory alloy wire is fixed on the horizontal screw flange nut pair on the wood column; the shape memory alloy wires are equally stressed through adjusting bolts.
The invention has the advantages that: the reinforced wood structure mortise-tenon joint has the advantages that the shear bearing capacity and the bending bearing capacity of the reinforced wood structure mortise-tenon joint are obviously improved by utilizing the characteristics of self-resetting, no residue after deformation and the like of the shape memory alloy, the energy consumption capacity is also obviously improved, and the reinforced wood structure mortise-tenon joint can be recovered after earthquake and has no residual deformation. The earthquake resistance after node reinforcement is improved, so that the earthquake resistance of the whole structure is optimized.
The invention has good durability, corrosion resistance and fatigue resistance.
The clamp is adopted to connect the shape memory alloy wire with the wood structure, no wood nails or wood screws are used, no damage is generated to the original structure, and the repairing and reinforcing principles of repairing as old and keeping the original structure are achieved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a structure of a horizontal steel plate and its accessories;
FIGS. 3 (a) and 3 (b) are a front view of a horizontal steel plate and a cross-sectional view of FIGS. 3 (a) A-A, respectively;
FIGS. 4 (a) and 4 (B) are front view and cross-sectional view of the bearing support and FIG. 4 (a) B-B, respectively;
fig. 5 (a), 5 (b) and 5 (c) are front, left and top views, respectively, of a vertical steel plate;
FIG. 6 is a schematic structural view of a wood post clip;
fig. 7 (a), 7 (b) and 7 (c) are front, left and top views, respectively, of an arc-shaped steel plate;
fig. 8 (a), 8 (b) and 8 (c) are front, left and top views, respectively, of a square steel plate.
In the figure: 1. a wood column; 2. a wood beam; 3. a horizontal steel plate; 4. a vertical screw; 5. arc-shaped steel plates; 6. a horizontal screw; 7. square steel plate; 8. a flange nut; 9. a shape memory alloy wire; 10. rotating the round shaft; 11. A bearing support; 12. a vertical steel plate; 13. an adjustable pre-strain device. 13-1, a screw; 13-2, nuts; and adjusting the bolts 13-3.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples, but is not intended to be limiting.
As shown in fig. 1, a wood structure mortise-tenon joint for installing shape memory alloy wires comprises a wood column 1 and a wood beam 2 connected with the wood column 1, wherein the upper and lower positions of the mortise-tenon joint are respectively connected with shape memory alloy wires 9 with the same number and the same diameter, the connection positions and the connection modes of the shape memory alloy wires 9 are vertically symmetrical along the axis of the wood beam 2, the upper half part of a symmetrical part is described here as an example, the lower end of the shape memory alloy wire 9 is fixed at the top of the wood beam 2 through a horizontal steel plate connecting piece, the upper end of the shape memory alloy wire 9 is fixed at the inner side of the wood column 1 through a wood column clamp, and when the wood structure mortise-tenon joint repeatedly rotates, the shape memory alloy wires 9 repeatedly stretch and reset to bear the internal force of the wood column 1 and the wood beam 2.
As shown in fig. 2, 3 (a) and 3 (b), the horizontal steel plate connecting piece comprises horizontal steel plates 3 which are respectively distributed on the upper and lower sides of the wood beam 2, the horizontal steel plates 3 are provided with four oval through holes and are fixed on the top surface of the wood beam 2 by using vertical screws 4, and the horizontal steel plates 3 are respectively provided with a rotary circular shaft 10 supported by a bearing support 11 and a plurality of adjustable pre-strain devices 13 connected by vertical steel plates 12. The adjustable pre-strain device 13 comprises a plurality of screw rods 13-1 penetrating through the vertical steel plate 12, nuts 13-2 fixing the screw rods 13-1 and adjusting bolts 13-3 connecting the screw rods 13-1, wherein the adjusting bolts 13-3 are vertically distributed along the screw rods 13-1.
As shown in fig. 4 (a) and 4 (b), the bearing support 11 is composed of a middle bearing and a support wrapped around the periphery of the bearing, the rotary round shaft 10 is fixed on the horizontal steel plate 3 through the left and right bearing supports 11, and the rotary round shaft 10 is provided with grooves with the same number as the shape memory alloy wires 9.
As shown in fig. 5 (a), 5 (b) and 5 (c), the vertical steel plate 12 is composed of a long steel plate and left and right triangular steel plates, and is welded on the horizontal steel plate 3 on the top surface of the wood beam 2, the long steel plate is provided with round holes with the same number as the shape memory alloy wires 9, and the round holes are distributed equidistantly along the length direction.
As shown in fig. 6, the wood column clamp is fixed on the peripheral wall of the wood column 1, and consists of two arc-shaped steel plates 5 and bolts for connecting the arc-shaped steel plates 5.
As shown in fig. 1, 7 (a), 7 (b) and 7 (c), 8 (a), 8 (b) and 8 (c), two square steel plates 7 are welded back and forth inside the wood column clamp, the square steel plates 7 are provided with round holes, and the round holes are connected by a horizontal screw rod 6. The horizontal screw rods are uniformly distributed with the same number of flange nut pairs as the shape memory alloy wires, and each pair of flange nuts 8 is used for fixing the shape memory alloy wires 9. One end of a plurality of shape memory alloy wires 9 passes through a groove below the rotary circular shaft 10 and is connected to the adjustable pre-strain device 13, and the specific connection mode is that one end of the shape memory alloy wires 9 penetrates through the fixed screw 13-1 to be fixed on the adjusting screw 13-3, and the other end is fixed on the horizontal screw 6 on the peripheral wall of the wood column 1 in pairs through the flange nut 8; the shape memory alloy wires 9 are regulated to have equal stress through the regulating bolts 13-3.
And respectively carrying out engineering analysis on the mortise and tenon joints of the wood structure under the action of small earthquake and large earthquake, and determining the size and parameters of the reinforcing device according to the performance requirement to be reached.
By adopting the reinforced wood structure mortise-tenon joint, the joint rotates very little in small earthquake, the rigidity of the reinforced joint is increased, and the shape memory alloy wire directly bears internal force; when a large earthquake occurs, the nodes are rotated greatly, so that the shape memory alloy is driven to stretch and reset repeatedly, a large amount of earthquake energy is dissipated, and the reinforcing device starts to play a role in energy consumption.
The invention is not limited to the above embodiments, and based on the technical solution disclosed in the invention, a person skilled in the art may make some substitutions and modifications to some technical features thereof without creative effort according to the technical content disclosed, and all the substitutions and modifications are within the protection scope of the invention.
Claims (5)
1. The utility model provides a device shape memory alloy wire's wood structure mortise-tenon joint, includes wood post (1), and connects wood beam (2) of wood post (1) through mortise-tenon joint, its characterized in that: a plurality of shape memory alloy wires (9) with the same number and the same diameter are respectively connected between the wood column (1) and the wood beam (2) at the mortise-tenon joint;
one end of each of the shape memory alloy wires (9) is respectively fixed on the upper end face and the lower end face of the wood beam (2) through a horizontal steel plate connecting piece, and the other end of each of the shape memory alloy wires is respectively fixed on the inner sides of the upper cylindrical surface and the lower cylindrical surface of the wood column (1) through a wood column clamp connecting piece;
the horizontal steel plate connecting piece comprises horizontal steel plates (3) which are respectively distributed on the upper part and the lower part of the wood beam (2), and vertical screw rods (4) which are connected with the upper horizontal steel plates (3), wherein the horizontal steel plates (3) are respectively provided with a rotary round shaft (10) supported by a bearing support (11) and a plurality of adjustable pre-strain devices (13) connected by vertical steel plates (12);
the adjustable pre-strain device (13) comprises a plurality of screws (13-1) penetrating through the vertical steel plate (12), nuts (13-2) for fixing the screws (13-1) and adjusting bolts (13-3) connected with the screws (13-1), wherein the adjusting bolts (13-3) are vertically distributed along the screws (13-1);
the rotary round shaft (10) is connected to the bearing support (11), and grooves with the same number as the shape memory alloy wires (9) are formed in the rotary round shaft (10);
one end of a plurality of shape memory alloy wires (9) passes through a groove below the rotary circular shaft (10) and is connected to the adjustable pre-strain device (13), and the specific connection mode is that one end of the shape memory alloy wires (9) penetrates through the fixing screw (13-1) and is fixed on the adjusting bolt (13-3);
the shape memory alloy wires (9) are vertically symmetrical along the axis of the wood beam (2), and when the mortise and tenon joint repeatedly rotates, the shape memory alloy wires repeatedly stretch and reset to bear the internal force of the wood column and the wood beam.
2. The device shape memory alloy wire of claim 1, wherein the device comprises a wood structure mortise-tenon joint: the vertical screw rods (4) penetrate through elliptical holes of the horizontal steel plate (3), and the elliptical holes are distributed on two sides of a bearing support (11) and two sides of the vertical steel plate (12) of the horizontal steel plate (3).
3. The device shape memory alloy wire of claim 1, wherein the device comprises a wood structure mortise-tenon joint: the wood column clamp connecting piece comprises a pair of arc-shaped steel plates (5) connected to the wood column (1) and bolts connected with the arc-shaped steel plates (5), and a horizontal screw rod (6) supported by a square steel plate (7) is arranged on the arc-shaped steel plates (5) on the inner side of the wood column (1).
4. A device shape memory alloy wire wood structure mortise and tenon joint according to claim 3, characterized in that: the horizontal screw (6) is uniformly distributed with flange nut pairs with the same number as the shape memory alloy wires (9), and each pair of flange nuts (8) is used for fixing the shape memory alloy wires (9).
5. The device shape memory alloy wire wood structure mortise and tenon joint according to any one of claims 1 to 4, wherein: the other ends of the shape memory alloy wires (9) are fixed on a flange nut pair of a horizontal screw (6) on the wood column (1); the shape memory alloy wires (9) are uniformly stressed through the adjusting bolts (13-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710586489.9A CN107217866B (en) | 2017-07-18 | 2017-07-18 | Wood structure mortise and tenon joint of device shape memory alloy wire |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710586489.9A CN107217866B (en) | 2017-07-18 | 2017-07-18 | Wood structure mortise and tenon joint of device shape memory alloy wire |
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| CN107217866A CN107217866A (en) | 2017-09-29 |
| CN107217866B true CN107217866B (en) | 2023-08-18 |
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| CN201710586489.9A Active CN107217866B (en) | 2017-07-18 | 2017-07-18 | Wood structure mortise and tenon joint of device shape memory alloy wire |
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| CN108301636B (en) * | 2018-03-21 | 2024-03-08 | 北京交通大学 | Friction type arc damping limiting and reinforcing device and preparation method thereof |
| CN109537928B (en) * | 2018-11-26 | 2020-12-11 | 黑龙江建筑职业技术学院 | Frame beam column anti-seismic reinforcing structure and construction method |
| CN109853737B (en) * | 2019-01-17 | 2024-03-12 | 西安建筑科技大学 | Recoverable energy-dissipation wood structure beam-column node |
| CN110080551B (en) * | 2019-04-29 | 2021-02-05 | 杭州科技职业技术学院 | Reinforcing method for protecting wooden structure ancient building |
| CN112412086A (en) * | 2020-10-21 | 2021-02-26 | 北京工业大学 | Reinforcing device for beam-column mortise-tenon joint and mounting method thereof |
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| CN113668704A (en) * | 2021-09-10 | 2021-11-19 | 郑州大学 | Wood beam and wood column self-resetting mortise-tenon joint based on SMA (shape memory alloy) bars |
| CN114658257B (en) * | 2022-05-05 | 2023-10-31 | 西安建筑科技大学 | Reinforcing device and method for loose mortise and tenon joint of historic building wood structure |
| CN114908992B (en) * | 2022-05-05 | 2023-10-03 | 西安建筑科技大学 | Friction energy consumption enhancing device and method for loosening mortise and tenon joint |
| CN115030558A (en) * | 2022-08-01 | 2022-09-09 | 聊城大学 | Semi-active self-resetting tenon-and-mortise joint reinforcing device and reinforcing method |
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