CN209799007U - Replaceable energy-consuming wood structure beam-column joint - Google Patents
Replaceable energy-consuming wood structure beam-column joint Download PDFInfo
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- CN209799007U CN209799007U CN201920366799.4U CN201920366799U CN209799007U CN 209799007 U CN209799007 U CN 209799007U CN 201920366799 U CN201920366799 U CN 201920366799U CN 209799007 U CN209799007 U CN 209799007U
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Abstract
a replaceable energy dissipating wood structural beam-column joint comprising: the beam-column connecting piece is arranged on the inner side surface of the wood column and is positioned between the connecting end parts of the wood column and the wood beam; the steel plate frame is arranged at the end of the wood beam and attached to the upper, lower, front and rear four sides of the end surface of the wood beam; the plurality of embedded bars are respectively embedded in the pore passages or the channels of the end faces of the wood beams through adhesives; and the shape memory alloy screw rods are positioned between the embedded bars and the beam-column connecting piece. The utility model discloses an adjustment high strength bolt's pretightning force to and utilize shape memory alloy screw rod's super elasticity performance, through adjusting its prestressing force, quantity and size, improve the initial rigidity and the self-resuming ability of node, guarantee that shape memory alloy screw rod takes place to surrender earlier than beam column component and destroys, greatly reduced timber structure maintenance and repair cost.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a replaceable energy-consuming wood structure beam-column node.
Background
at present, most of the timber beam column structure systems adopt a node form of bolt connection. The common form is that the timber components are connected by bolts, and the node form mainly utilizes the bending resistance of the bolts and the local bearing of the timber at the bolts to provide the bearing capacity. The node form has several problems:
(1) due to 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) Due to the low tensile strength of the wood cross grains, when the screw holes and the pin grooves bear pressure, brittle failures such as beam end cross grain splitting and the like often occur, the bending resistance of the wood cannot be fully exerted, and the integral bearing capacity of a beam-column system with a wood structure is reduced.
(3) The bearing capacity is provided through the modes of bolt yielding, pressed yielding of wood at bolt holes and the like, and after an earthquake, large residual deformation exists, so that the earthquake resistance is reduced.
(4) The joints connected by the beam-column connecting pieces are mostly hidden in the beam, so that the problem of difficulty in maintenance exists.
Therefore, in order to solve the above problems, a new beam-column connection node form with high initial rigidity, high bending resistance, small residual deformation after earthquake and easy maintenance is urgently needed.
Disclosure of Invention
in order to overcome the disadvantages of the prior art, the present invention provides a replaceable energy-consuming wood-structure beam-column node, so that the wood-structure beam-column node has a large initial stiffness, a large bending resistance, a small residual deformation after an earthquake, and is easy to repair.
In order to achieve the purpose, the invention adopts the technical scheme that:
A replaceable energy dissipating wood structural beam-column node, comprising:
The beam column connecting piece 5 is arranged on the inner side surface of the wood column 1 and is positioned between the connecting end parts of the wood column 1 and the wood beam 2, the beam column connecting piece 5 comprises an I-shaped steel, and a plurality of vertical steel plates perpendicular to the web plate are welded between an upper wing plate and a lower wing plate of the I-shaped steel;
The steel plate frame 10 is sleeved at the beam end of the wood beam 2;
A plurality of embedded bars 9 are horizontally pre-arranged at the beam end of the wood beam 2 and extend out of a part for connection;
The shape memory alloy screw rods 6 are connected between the vertical steel plates of the beam-column connecting piece 5 and the embedded bars 9.
One end of an upper wing plate and one end of a lower wing plate of the I-steel extend towards the end part of the wooden beam 2, a vertical steel plate is welded between the other ends of the upper wing plate and the lower wing plate, the lower surface of the upper wing plate extension is attached to the upper surface of the steel plate frame 10, the upper surface of the lower wing plate extension is attached to the lower surface of the steel plate frame 10, the upper wing plate extension, the upper surface of the steel plate frame 10, the wooden beam 2, the lower surface of the steel plate frame 10 and the lower wing plate extension are connected through high-strength bolts 3, and holes for enabling the high-strength bolts 3 to horizontally move towards the direction far away from or close.
The vertical steel plate has three at least, with 2 terminal surfaces of timber beams nearest be vertical steel plate one, next nearest be vertical steel plate two, the farthest be vertical steel plate three, wherein, the bar planting 9 is worn out from vertical steel plate one, be connected with the one end of shape memory alloy screw rod 6, the other end of shape memory alloy screw rod 6 is worn out from vertical steel plate two, fix with nut two 7, vertical steel plate three parallel and level in the tip of pterygoid lamina about the I-steel, and attached in 1 medial surface of post, be provided with the steel backing plate 13 that corresponds with vertical steel plate three on 1 lateral surface of post, bolt 11 passes vertical steel plate three, post 1 and steel backing plate 13 realize connecting, and fix with nut three 12.
The shape memory alloy screw 6 is connected with the embedded bar 9 through the conversion nut 8, and the conversion nut 8 meeting the shape memory alloy screws with different diameters can be replaced to meet the requirement of structural safety.
And stiffening ribs which are vertical to the lower wing plate and have the same length direction are arranged below the lower wing plate of the I-shaped steel.
The outer sides of the vertical steel plates are flush with the outer sides of flanges of the I-shaped steel, and holes for the vertical movement of the embedded bars 9 exist in the vertical steel plates attached to the end faces of the wood beams 2.
The steel sheet frame 10 is the penetrating frame structure by two horizontal steel sheets and two vertical steel sheets, and two horizontal steel sheets attach respectively in the upper and lower surface of timber beams 2, and the parallel and level is in the upper and lower surface of timber beams 2, and two vertical steel sheets attach respectively in the preceding, the rear surface of timber beams 2, and the parallel and level is in the preceding, the rear surface of timber beams 2.
The wood columns 1 and the wood beams 2 are made of logs, sawn timber, laminated wood or laminated veneer lumber; the embedded bars 9 are screw steel, screw rods, round steel, steel pipes or FRP.
The shape memory alloy screw 6 applies initial pre-strain to ensure that the shape memory alloy screw 6 has restoring force without complete looseness after node unloading, the initial pre-strain meets the requirement of mechanical stability of the shape memory alloy screw 6, and the mechanical property degradation of the screw 6 caused by the pre-strain is prevented.
The shape memory alloy screw 6 has excellent superelasticity performance, small residual deformation, high martensite phase transformation stress and high reverse phase transformation stress, and ensures that the node has larger restoring force in the unloading process.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention utilizes the super-elasticity performance of the shape memory alloy screw rod, and improves the initial rigidity and the self-recovery capability of the node by adjusting the pre-strain, the quantity and the size of the shape memory alloy screw rod.
2. The high-strength bolts are utilized, and the initial rigidity and the energy consumption capability of the node are improved by adjusting the pretightening force, the number and the size of the high-strength bolts.
2. According to the invention, through reasonable design of the beam-column connecting piece, the fracture damage of the wood beam cross grain can be avoided.
3. According to the invention, through reasonable design, the yield failure of the shape memory alloy screw rod before bar planting and beam column components can be ensured.
4. The shape memory alloy screw rod is easy to overhaul and replace, the maintenance and repair cost of the wood structure is greatly reduced, and the sustainable development concept of modern buildings is reflected.
Drawings
Fig. 1 is a schematic view of a replaceable energy dissipating timber structural beam-column joint.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a top view of fig. 1.
fig. 4 is a bottom view of fig. 1.
Fig. 5 is a schematic view of a beam-column connection.
Fig. 6 is a schematic view of a steel plate frame.
Reference numbers in the figures: the beam column connecting piece is characterized in that 1 is a wood column, 2 is a wood beam, 3 is a high-strength bolt, 4 is a first nut, 5 is a beam column connecting piece, 6 is a shape memory alloy screw rod, 7 is a second nut, 8 is a conversion nut, 9 is a planting bar, 10 is a steel plate frame, 11 is a first bolt, 12 is a third nut, and 13 is a steel base plate.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 1, 2, 3 and 4, a replaceable energy-consuming wood structure beam-column joint mainly comprises a beam-column connecting piece 5, a steel plate frame 10, a steel bar 9 and a shape memory alloy screw 6, wherein the wood beam 2 and the wood column 1 are made of logs, sawn timber, laminated veneer lumber or other engineering wood. Wherein:
The beam-column connecting piece 5 is positioned between the connecting end parts of the wooden columns 1 and the wooden beams 2, and comprises an I-shaped steel and a plurality of vertical steel plates perpendicular to the web plates, wherein the I-shaped steel comprises the I-shaped steel, and the vertical steel plates are welded between the upper wing plate and the lower wing plate of the I-shaped steel, referring to fig. 5.
for further being convenient for connect, I-steel terminal surface department all is sealed by the vertical steel sheet of perpendicular to web, and is close to the one end of 2 tip of wooden beam and prolongs to 2 tip directions of wooden beam, these two vertical steel sheets at both ends respectively attached with 1 medial surface of post, 2 terminal surfaces of wooden beam, have the hole that supplies bar 9 to plant to reciprocate with the attached steel sheet of 2 terminal surfaces of wooden beam.
The lower surface of the upper wing plate extension portion is attached to the upper surface of the steel plate frame 10, the upper surface of the lower wing plate extension portion is attached to the lower surface of the steel plate frame 10, the upper wing plate extension portion, the upper surface of the steel plate frame 10, the wood beam 2, the lower surface of the steel plate frame 10 and the lower wing plate extension portion are connected through high-strength bolts 3, and holes for enabling the high-strength bolts 3 to horizontally move in the direction far away from or close to the wood column 1 are formed in the upper wing plate extension portion and the lower wing plate extension portion.
In order to further improve the strength, two stiffening ribs which are vertical to the lower wing plate and have the same length direction are arranged below the lower wing plate of the I-shaped steel.
In an embodiment of the invention, the number of the vertical steel plates is three, the vertical steel plate I is closest to the end face of the wood beam 2, the vertical steel plate II is next closest to the end face of the wood beam, the vertical steel plate III is farthest from the end face of the wood beam, the planting ribs 9 penetrate out of the vertical steel plate I and are connected with one end of the shape memory alloy screw 6, the other end of the shape memory alloy screw 6 penetrates out of the vertical steel plate II and is fixed through the nuts II 7, the vertical steel plate III is flush with the end portions of the upper and lower wing plates of the I-shaped steel and is attached to the inner side face of the wood column 1, a steel backing plate 13 corresponding to the vertical steel plate III is arranged on the outer side face of the wood column 1, and the bolts I11 penetrate through the vertical steel.
Referring to fig. 6, the steel plate frame 10 is a transparent frame structure formed by two horizontal steel plates and two vertical steel plates, and is sleeved on the beam end of the wood beam 2, the two horizontal steel plates are perpendicular to the vertical steel plates, the two horizontal steel plates are respectively attached to the upper surface and the lower surface of the wood beam 2, are flush with the upper surface and the lower surface of the wood beam 2, and are connected with the wood beam 2 through high-strength bolts 3.
The planting bars 9 are 16mm in diameter and 4 in number, are horizontally planted in pre-drilled or reserved holes on the end face of the wood beam 2 or in a channel formed in the pre-drilled or reserved holes through adhesives, extend out a part for connection, are connected with the shape memory alloy screw 6 through the conversion nut 8, can be replaced by the conversion nut 8 meeting the shape memory alloy screws with different diameters in order to meet the requirement of structural safety, and can be threaded steel, screws, round steel, steel pipes or FRP (fiber reinforced plastic).
4 shape memory alloy screws 6 with the diameter of 16mm are respectively connected between the vertical steel plate of the beam-column connecting piece 5 and the embedded bars 9 through nuts 7 and conversion nuts 8; the shape memory alloy screw 6 applies initial pre-strain to ensure that the shape memory alloy screw 6 has restoring force without complete loosening after the node is unloaded; meanwhile, the initial pre-strain should meet the requirement of the mechanical stability of the shape memory alloy screw 6, and the mechanical property degradation of the screw 6 caused by the pre-strain is prevented. The shape memory alloy screw 6 has excellent superelasticity, and has the characteristics of small residual deformation, high martensitic phase transformation stress and high reverse phase transformation stress. And the nodes are ensured to have larger restoring force in the unloading process.
In the invention, the shape memory alloy screw 6, the embedded bar 9 and the nut are not fixed to the above number, but can be determined according to the design number of the beam-column connecting node.
During implementation, the embedded steel bars 9 are inserted into the reserved holes or the channels in advance, gluing is carried out through an adhesive, connection of the wood beams 2 and the embedded steel bars 9 is achieved, then the steel plate frames 10 are placed at the beam ends of the wood beams 2, connection of the shape memory alloy 6 and the embedded steel bars 9 is achieved through the conversion nuts 8, prestress is applied through the nuts two 7, connection of the shape memory alloy and the beam-column connecting pieces 5 is achieved, then the high-strength bolts 3 sequentially penetrate through the beam-column connecting pieces 5, the holes reserved for the steel plate frames 10 and the wood beams 2, pretightening force is applied through the nuts one 4 to achieve high-strength connection of the wood beams 2 and the beam-column connecting pieces 5, and finally the beam-column connecting pieces 5 are connected with the wood columns 1 through the.
the principle of the invention is as follows:
According to the invention, under the condition of a load applied by a load specification, according to an interlayer displacement limit value specified by an anti-seismic design specification, by utilizing the superelasticity performance of the shape memory alloy screw rod and adjusting the prestrain, the number and the size of the shape memory alloy screw rod, the node achieves higher initial rigidity and bending resistance, and meets the requirement of the anti-seismic specification. In an earthquake, the self-resetting capability provided by the shape memory alloy screw dissipates a large amount of earthquake energy, and reduces the damage degree of the earthquake to the building structure. After the earthquake, the shape memory alloy screw rod can be repaired and processed, even replaced, so that the building can reach the standard requirement. Under the condition of load applied by the load specification, the node achieves higher initial rigidity by adjusting the pretightening force, the quantity and the size of the high-strength bolt according to the interlayer displacement limit value specified by the anti-seismic design specification, and meets the requirement of the anti-seismic specification. Through reasonable design beam column connecting piece, make its restraint timber roof beam tip striae direction, effectively avoid timber roof beam tip striae fracture to destroy, be favorable to exerting ligneous intensity, make the node have higher shear capacity simultaneously. Compared with the traditional wood structure beam-column joint, the invention has the advantages of large initial rigidity, strong bending resistance, easy maintenance, replaceable shape memory alloy screw and self-resetting performance (small residual deformation after earthquake).
Claims (9)
1. A replaceable energy dissipating wood structural beam-column node, comprising:
The beam-column connecting piece (5) is arranged on the inner side surface of the wood column (1) and is positioned between the connecting end parts of the wood column (1) and the wood beam (2), the beam-column connecting piece (5) comprises an I-shaped steel, and a plurality of vertical steel plates perpendicular to the web plate are welded between an upper wing plate and a lower wing plate of the I-shaped steel;
The steel plate frame (10) is sleeved at the beam end of the wood beam (2);
A plurality of bar planting (9) are horizontally pre-arranged at the beam end of the wood beam (2) and extend out of a part for connection;
the shape memory alloy screw rods (6) are connected between the vertical steel plates of the beam-column connecting pieces (5) and the embedded bars (9).
2. the replaceable energy-dissipating wood structure beam-column node according to claim 1, wherein one end of an upper wing plate and one end of a lower wing plate of the I-shaped steel extend towards the end of the wood beam (2), a vertical steel plate is welded between the other ends of the upper wing plate and the lower wing plate, the lower surface of the upper wing plate extension is attached to the upper surface of the steel plate frame (10), the upper surface of the lower wing plate extension is attached to the lower surface of the steel plate frame (10), the upper wing plate extension, the upper surface of the steel plate frame (10), the lower surface of the wood beam (2), the lower surface of the steel plate frame (10) and the lower wing plate extension are connected through high-strength bolts (3), and holes for enabling the high-strength bolts (3) to horizontally move towards the direction far away from or close to the wood column.
3. The replaceable energy dissipating wood structural beam-column node of claim 1 or 2, wherein the vertical steel plate has at least three, the vertical steel plate I is arranged closest to the end face of the wood beam (2), the vertical steel plate II is arranged next to the end face of the wood beam, the vertical steel plate III is arranged farthest to the end face of the wood beam, wherein the embedded bar (9) penetrates out of the first vertical steel plate and is connected with one end of the shape memory alloy screw rod (6), the other end of the shape memory alloy screw rod (6) penetrates out of the second vertical steel plate, fixed by a second nut (7), the vertical steel plate III is flush with the end parts of the upper wing plate and the lower wing plate of the I-shaped steel and is attached to the inner side surface of the wooden column (1), and a steel base plate (13) corresponding to the vertical steel plate III is arranged on the outer side surface of the wood column (1), and the first bolt (11) penetrates through the vertical steel plate III, the wood column (1) and the steel base plate (13) to realize connection and is fixed by a third nut (12).
4. the replaceable energy dissipating wood structural beam-column node of claim 1, wherein the shape memory alloy screw (6) is connected with a planting bar (9) through a transition nut (8).
5. The replaceable energy dissipating wood structural beam-column node of claim 1, wherein a stiffening rib is disposed below the lower wing plate of the i-beam and is perpendicular to the lower wing plate and has a uniform length direction.
6. The replaceable energy-dissipating wood structure beam-column joint according to claim 1, wherein the outer side of each vertical steel plate is flush with the outer side of the flange of the i-shaped steel, and holes for the embedded bars (9) to move up and down are formed in the vertical steel plate attached to the end face of the wood beam (2).
7. the replaceable energy-dissipating wood structure beam-column node according to claim 1, wherein the steel plate frame (10) is a transparent frame structure composed of two horizontal steel plates and two vertical steel plates, the two horizontal steel plates are respectively attached to the upper and lower surfaces of the wood beam (2) and are flush with the upper and lower surfaces of the wood beam (2), and the two vertical steel plates are respectively attached to the front and rear surfaces of the wood beam (2) and are flush with the front and rear surfaces of the wood beam (2).
8. The replaceable energy dissipating wood structural beam-column node according to claim 1, wherein the wood columns (1) and the wood beams (2) are made of logs, sawn timber, laminated wood or laminated veneer lumber; the embedded bar (9) is screw steel, a screw rod, round steel, a steel pipe or FRP.
9. The replaceable energy dissipating wood structural beam-column node of claim 1, wherein the shape memory alloy screw (6) applies an initial pre-strain to ensure that the shape memory alloy screw (6) has a restoring force without complete loosening after unloading of the node, the initial pre-strain satisfying the requirement of mechanical stability of the shape memory alloy screw (6) to prevent the pre-strain from inducing the mechanical property degradation of the screw (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920366799.4U CN209799007U (en) | 2019-03-22 | 2019-03-22 | Replaceable energy-consuming wood structure beam-column joint |
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| CN201920366799.4U CN209799007U (en) | 2019-03-22 | 2019-03-22 | Replaceable energy-consuming wood structure beam-column joint |
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| CN209799007U true CN209799007U (en) | 2019-12-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914601A (en) * | 2019-03-22 | 2019-06-21 | 西安建筑科技大学 | A kind of replaceable energy consumption timber structure beam-column joint |
| CN114087266A (en) * | 2021-10-27 | 2022-02-25 | 山西全旅新材料科技有限公司 | High-strength all-aluminum office furniture installation device and installation method thereof |
-
2019
- 2019-03-22 CN CN201920366799.4U patent/CN209799007U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914601A (en) * | 2019-03-22 | 2019-06-21 | 西安建筑科技大学 | A kind of replaceable energy consumption timber structure beam-column joint |
| CN109914601B (en) * | 2019-03-22 | 2024-03-12 | 西安建筑科技大学 | Replaceable energy-consumption wood structure beam-column joint |
| CN114087266A (en) * | 2021-10-27 | 2022-02-25 | 山西全旅新材料科技有限公司 | High-strength all-aluminum office furniture installation device and installation method thereof |
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