CN117188602A - Node structure for prestress wood beam-steel column connection and construction method - Google Patents

Abstract

The invention discloses a node structure for prestress wood beam-steel column connection and a construction method thereof, comprising a steel column, a wood beam, a protective sleeve, prestress ribs and a connecting component, wherein the wood beam and the steel column are mutually perpendicular and are directly and rigidly connected through the connecting component; the prestress rib transversely penetrates through the wood beam to be arranged and is bonded with the wood beam to form a whole, prestress is provided for the wood beam, the protection sleeve component is sleeved at the end part of the wood beam, opposite to the steel column, and a protection structure and clamping force are formed on the end face of the wood beam. According to the invention, the steel column and the wood beam are directly and rigidly connected, so that the rigidity effect of the beam-column structure is ensured. Meanwhile, on the basis of the node structure based on the prestress wood beam-steel column connection, a structure for applying prestress in the wood beam is also provided. Compared with the traditional hinge joint, the invention can reduce the maximum bending moment born by the large-span wood beam, improve the bending-resistant bearing capacity and effectively reduce the section height.

Description

Node structure for prestress wood beam-steel column connection and construction method

Technical Field

The invention relates to the technical field of civil engineering, in particular to a node structure for connecting a prestressed wood beam and a steel column and a construction process.

Background

The wood structure is a low-carbon environment-friendly structural system, has a unique decorative effect, and has an increasingly wide application range at present. However, compared with the traditional reinforced concrete and steel structure, the wood structure is limited by the material property and the special installation mode, the current application range of the wood structure is limited, and meanwhile, the problem of overlarge section height can occur when the wood structure is applied to a large-span structure.

Some prior researches propose some steel column-wood beam connection and prestressed wood beams to solve the technical problems, and the steel column-wood beam connection is disclosed as follows: in CN 107386464A, a wood beam-steel column node reinforced connection structure is disclosed, which connects a wood beam to a side wall of a steel column to realize a steel-wood connection structure, and at the same time, the scheme reinforces the wood beam by arranging a cover plate and FRP cloth at the end of the wood beam.

However, in the patent, the cover plate and the FRP cloth are additionally arranged at the end of the wood beam, so that the premature shearing damage of the end of the wood beam can be avoided, the shearing resistance of the end of the wood beam is improved, the loading capacity of the whole wood beam can not be improved, and the deformation of the wood beam can not be restrained sufficiently.

Meanwhile, the publication number is: in the chinese patent of CN 111827466A, it discloses a prestressed steel-wood composite beam-column node, wherein the end of the wood beam is provided with H-shaped steel, and the upper and lower ends of the H-shaped steel are provided with wood columns, the wood beam and the wood columns are connected by the H-shaped steel, the reinforced H-shaped steel is provided in the core area of the node to replace the original wood, and the connection is performed by the angle steel energy dissipation member 5, so that under the action of earthquake force, the beam-column member is allowed to generate relative deformation in the node area, the earthquake input energy is dissipated by the angle steel energy dissipation member which is locally weakened by plastic deformation, and the strength and rigidity of the whole node are improved; meanwhile, the unbonded prestressed tendons penetrate through the wood beam, and can be pulled back to an initial state under the shrinkage action of the prestressed tendons after earthquake, so that the self-resetting performance of the node is ensured.

However, the patent has a complex structure; and meanwhile, the prestressed tendons in the scheme can only play a role in self-resetting, and the problem that the deformation of the wood beam can be restrained fully cannot be solved.

Therefore, the overall rigidity effect of the beam-column structure cannot be ensured, and therefore, how to improve the rigidity effect of the beam-column structure is a problem to be solved in the field.

Disclosure of Invention

Aiming at the technical problem that the rigidity effect of the existing beam column structure is not strong, the aim of the scheme is to provide a node structure for connecting a prestressed wood beam and a steel column, which can realize the effective rigid connection between the steel column and the wood beam, ensure the rigidity effect of the beam column structure, and on the basis, also provide a construction method for the node structure for connecting the prestressed wood beam and the steel column, thereby well overcoming the problems existing in the prior art.

In order to achieve the aim, the invention provides a node structure for connecting a prestressed wood beam and a steel column, which comprises the steel column, the wood beam, a protective sleeve, prestressed tendons and a connecting component, wherein the wood beam and the steel column are mutually perpendicular and are directly and rigidly connected through the connecting component; the prestress rib transversely penetrates through the wood beam to be arranged and is bonded with the wood beam to form a whole, prestress is provided for the wood beam, the protection sleeve component is sleeved at the end part of the wood beam, opposite to the steel column, and a protection structure and clamping force are formed on the end face of the wood beam.

Further, a plurality of node connection positions are distributed on the steel column, and stiffening baffles are respectively arranged at the node connection positions.

Further, the protective sleeve component comprises an end steel plate, a first clamping plate, a second clamping plate, a first side plate and a second side plate, wherein the first clamping plate and the second clamping plate are oppositely arranged and are connected with the end steel plate, the first side plate and the second side plate are oppositely arranged and are connected with the end steel plate to form the protective sleeve component with a rectangular structure, and the protective sleeve component is sleeved at the end of the wood beam and is fixed with the wood beam.

Further, the first clamping plate and the second clamping plate are transversely arranged on two end faces of the wood beam and are connected with the end steel plates, locking pieces are arranged on the first clamping plate and the second clamping plate in a matched mode, and the first clamping plate, the second clamping plate and the wood beam are clamped through the locking pieces.

Further, the first side plate and the second side plate are transversely arranged on two side walls of the wood beam and are connected with the end steel plates.

Further, the end steel plates are arranged on the end faces of the wood beams opposite to the steel columns and are directly and rigidly connected with the wood beams through connecting assemblies.

Further, the connecting assembly comprises steel corbels and H-shaped steel, the steel corbels and the H-shaped steel are connected in a bolt welding mode to form an integrated structure, one end of the connecting assembly is rigidly connected with the stiffening partition plate on the steel column, and the other end of the connecting assembly is rigidly connected with the end steel plate.

Further, the ends of the prestressed tendons transversely penetrate through the wood beams and are anchored on the end steel plates.

Further, the prestress rib and the wood beam are integrally formed through bonding.

In order to achieve the above object, the present invention provides a construction method of a node structure of prestressed wood beam-steel column connection, the construction method comprising:

1: prefabricating the wood beam, the steel pipe column and the protective sleeve component:

2: after prefabrication is completed, assembly is carried out on site:

2.1: transversely penetrating a prestress rib from one end of a wood beam to the other end of the wood beam through an installation groove in the wood beam, and anchoring the prestress rib on the wood beam for tensioning;

2.2: glue is filled in the mounting groove, the prestress ribs and the wood beams are bonded to form an integral structure, and prestress is released after bonding is completed;

2.3: a plurality of wood beams with the prestressed tendons are arranged in a stacking way and are glued;

2.4: the protection sleeve assembly is sleeved on the end face of the wood beam, opposite to the steel column, clamping plates in the protection sleeve assembly are respectively arranged at the upper end and the lower end of the wood beam, and vertically penetrate through the wood beam in cooperation with tensioning bolts, so that the clamping plates are fixed at the upper end and the lower end of the wood beam;

2.5: penetrating the end of the prestressed tendon through the end steel plate and anchoring the prestressed tendon to the prestressed tendon;

2.6: and welding the steel pipe column and the end steel plate on the wood beam through the steel corbel to finish the rigid connection between the steel pipe column and the wood beam.

According to the node structure for the prestress wood beam-steel column connection and the construction method, the steel column is directly and rigidly connected with the wood beam, so that the rigidity effect of the beam column structure is guaranteed.

Meanwhile, on the basis of the node structure based on the prestress wood beam-steel column connection, a structure for applying prestress in the wood beam is also provided, so that the maximum bending moment born by the large-span wood beam can be reduced, the bending bearing capacity of the large-span wood beam is improved, and the section height of the large-span wood beam is effectively reduced.

Drawings

The invention is further described below with reference to the drawings and the detailed description.

FIG. 1 is a front plan view of a node structure of the present prestressed wood girder-steel column connection;

FIG. 2 is a top plan view of the node structure of the present prestressed wood girder-steel column connection;

FIG. 3 is a schematic diagram of a clamping plate structure in the node structure of the prestress wood beam-steel column connection;

fig. 4 is a schematic diagram of the assembly structure of the prestressed tendons in the joint structure of the prestressed wood beam-steel column connection.

The following is a description of the components in the drawings:

100. steel columns 110, stiffening baffles 200, wood beams 300, cleats 310, first cleats 320, second cleats 330, locking members 340, end steel plates 350, first side plates 360, second side plates 400, tendons 410, glue 500, connection assemblies 510, steel corbels 520, H-section steel 530, steel plates.

Detailed Description

The invention is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.

Aiming at the technical problems of complex structure and weak rigidity effect of the existing steel-wood structure, based on the technical problems, the scheme provides a node structure for connecting a prestressed wood beam and a steel column, which can realize effective rigid connection between the steel column and the wood beam, and simultaneously, on the basis of the node structure for connecting the prestressed wood beam and the steel column, a method for applying prestress in the wood beam is also provided, so that the maximum bending moment born by the large-span wood beam can be reduced, the bending bearing capacity of the wood beam is improved, and the section height of the wood beam is effectively reduced.

The node structure of the prestress wood beam-steel column connection provided by the scheme, referring to fig. 1-2, comprises a steel column 100, a wood beam 200, a steel corbel 200, a protective sleeve assembly 300, a prestress rib 400 and a connecting assembly 500.

Further, the steel column 100 is provided with a plurality of nodes along the vertical structure, and each node is internally provided with a stiffening partition plate 110 at a connecting position, and the stiffening partition plates 110 are arranged for stiffening so as to ensure that the nodes of the steel column 100 have enough strength and steel bones.

The structure of the steel column 100 is not limited herein, and may be, for example, a steel pipe column or an H-steel, and the specific choice may be according to practical situations.

The wooden beam 200 and the steel column 100 are mutually perpendicular and are directly rigidly connected, a first mounting groove is transversely formed in the wooden beam 200, a first mounting hole is correspondingly formed in the transverse two ends of the wooden beam, and the first mounting hole is communicated with the first mounting groove to form a first mounting channel of the prestressed tendon 400.

Similarly, a plurality of second mounting grooves are vertically formed in the wood beam 200, and a plurality of second mounting holes are correspondingly formed in the vertical two ends of the wood beam 200 and correspondingly communicated with the second mounting grooves to form a second mounting channel.

The material of the wood beam 200 is not limited in this embodiment, and various wood-structured building materials such as laminated wood, CLT, etc. may be used as examples, and the specific choice may be according to practical situations.

Further, the connection surface of the wood beam corresponding to the steel column is sleeved with a protective sleeve assembly 300, and the protective sleeve assembly 300 comprises an end steel plate 340, a first clamping plate 310, a second clamping plate 320, a first side plate 350 and a second side plate 360. The first clamping plate 310 and the second clamping plate 320 are oppositely arranged and connected with the end steel plate 340, the first side plate 350 and the second side plate 360 are oppositely arranged and connected with the end steel plate 340 to form a protective sleeve component with a rectangular structure, and the protective sleeve component is sleeved at the end of the wood beam 200 and fixed with the wood beam 200.

When the protective sleeve assembly 300 is sleeved at the end of the wood beam 200, the end steel plate 340 is positioned on the connecting end face of the wood beam 200 opposite to the steel column 100, the first side plate 350 and the second side plate 360 are positioned on two opposite side walls of the wood beam 200, steel boots are formed on the two side walls of the wood beam 200, and the wood beam 200 is restrained and protected.

The first clamping plate 310 and the second clamping plate 320 are respectively positioned at the upper end and the lower end opposite to the wood beam 200, so that the upper end and the lower end opposite to the wood beam 200 can be protected, and meanwhile, the wood beam 200 is clamped, and the rigidity of the wood beam 200 is ensured.

After the first clamping plate 310 and the second clamping plate 320 are arranged on the upper end face and the lower end face of the wood beam 200, a plurality of through holes are uniformly distributed on the first clamping plate 310 and the second clamping plate 320, through holes are formed in the first clamping plate 310, mounting holes are formed in the upper end face of the wood beam 200, mounting holes are formed in the lower end face of the wood beam 200 and through holes are formed in the second clamping plate 320, the centers of the mounting holes and the through holes are located on the same horizontal line, and the locking piece 330 can penetrate through in sequence.

After the first clamping plate 310 and the second clamping plate 320 are arranged corresponding to the second mounting holes on the end face of the wood beam 200, the locking piece 330 sequentially passes through the through holes on the first clamping plate 310, the second mounting holes on the upper end face of the wood beam 200, the second mounting channel inside the wood beam 200, the second mounting holes on the lower end face of the wood beam 200 and the through holes on the second clamping plate 320, and is fastened, so that the drawknot of the wood beam and the first clamping plate 310 and the second clamping plate 320 is realized.

Through the retaining member 330 with 320 between first splint 310 and the second splint and tie up wood beam 200, can further with the upper and lower both ends of arranging in wood beam 200 of first splint 310 and second splint 320 fastening, and improve the clamping force between first splint 310 and the second splint 320 to wood beam 200, guarantee that wood beam 200 can share the extrusion stress transmission to first splint 310 when receiving the extrusion, on second splint 320 and the retaining member 330, prevent that wood beam 200 from taking place to destroy because of local compressive stress is too big.

The structure of the locking member 330 is not limited, and preferably, a split bolt is used, which is a high-strength bolt, and can realize steel structure connection between the wood beam and the clamping plate, so as to ensure connection rigidity and strength between the wood beam and the clamping plate.

Here, the distribution structure of the locking member 330 on the end face of the wooden beam 200 is not limited, as an example, referring to fig. 2, in this scheme, two sets of split bolts are symmetrically distributed on the end face of the wooden beam 200, and each set of split bolts is 6 and is uniformly distributed on the same horizontal line, so that the arrangement can ensure that the first clamping plate 310 and the second clamping plate 320 can be attached to the two end faces of the wooden beam 200, and the fastening between the first clamping plate 310, the second clamping plate 320 and the wooden beam 200 can be ensured, so as to prevent the end of the wooden beam 200 from rotating, thereby meeting the requirement of rigid connection.

Further, the end steel plates 340 are positioned on the end surfaces of the wood beams 200 connected with the steel columns 100, so that the rigid connection between the wood beams 200 and the steel columns 100 can be effectively achieved.

The wooden beam 200 is directly and rigidly connected with the steel column 100 through the connecting component 500, the connecting component is arranged between the steel column 100 and the wooden beam 200, the connecting component 500 comprises steel corbels 510 and H-shaped steel 520, and the steel corbels 510 and the H-shaped steel 520 are bolted by arranging steel plates 530 on two sides, so that the connection stability between the steel corbels 510 and the H-shaped steel 520 is ensured.

After the steel corbels 510 are integrally connected with the H-shaped steel 520, one end of the steel corbels is in rigid connection with the stiffening partition plates 110 in the steel column 100, the other end of the steel corbels is welded with the outer side of the end steel plate 340 on the wood beam 200 to form rigid connection between the steel column 100 and the wood beam 200, and the maximum bending moment born by the large-span wood beam can be reduced through the rigid connection between the end of the wood beam 200 and the steel column 100.

In this scheme, preferably through carrying out the bolt with steel bracket 510, H shaped steel 520, after the bolt forms an organic whole, weld both ends and steel column 100 and wooden beam 200 tip again, it is convenient to be under construction, and the connection quality is easily ensured.

The steel corbel 510 can be preferably formed by adopting H-shaped steel, the distribution optimization of the cross-sectional area is realized based on the specific structural structure of the H-shaped steel, and because all parts of the H-shaped steel are arranged at right angles, the H-shaped steel has the characteristic of strong bending resistance in all directions, and the rigid connection between the steel column 100 and the wood beam 200 can be better ensured.

The tendon 400 is used for improving the bending load-bearing capacity of the wood beam, and is arranged at the middle lower part of the wood beam 200, one end of the tendon 400 penetrates through a first installation channel in the wood beam 200 to be anchored with the steel plate 210 at the end of the wood beam, so that the force born by the wood beam 200 can be transferred to the tendon 400, the cooperative stress between the wood beam 200 and the tendon 400 is enhanced, and the bending load-bearing capacity of the wood beam 200 is improved through the tendon 400.

Meanwhile, referring to fig. 4, after the tendon 400 passes through the wood beam 200, the tendon 400 and the wood beam 200 are bonded together by glue 410, so that the tendon 400 and the wood beam 200 can be prevented from relatively dislocating, and the cooperative stress between the wood beam 200 and the tendon 400 is ensured. The prestress rib 400 is additionally arranged in the wood beam 200, so that the bending bearing capacity of the wood beam is improved, and the number of the wood beams and the section height are effectively reduced.

In summary, the node structure for connecting the prestressed wood beam and the steel column can realize rigid connection between the wood beam and the steel column; meanwhile, an arrangement mode of prestress is designed, the prestress can be effectively combined with a rigid connection mode in the scheme, the prestress ribs are rigidly connected with end steel plates on the wood beams, and meanwhile connection operation is not affected.

Based on the node structure of the prestress wood beam-steel column connection, the scheme also provides a construction method of the node structure of the prestress wood beam-steel column connection, which comprises the following steps:

1. prefabricating the wood beam 200, the steel column 100 and the protective sleeve assembly 300:

1.1: prefabricating the wood beam 200;

a first mounting groove is transversely formed in the wood beam 200, and corresponding first mounting holes are correspondingly formed in two end faces of the wood beam; and a second installation groove is vertically formed in the wood beam 200, and corresponding second installation holes are formed in the upper end surface and the lower end surface of the wood beam 200.

1.2: prefabricating the steel column 100:

the stiffening partition plates 110 are arranged at the joints distributed on the steel column 100 to stiffen, so that the steel column joints are ensured to have enough strength and steel bones.

1.3 prefabrication of the protective sleeve assembly 300:

the first clamping plate 310 and the second clamping plate 320 are oppositely arranged and connected with the end steel plate 340, and the first side plate 350 and the second side plate 360 are oppositely arranged and connected with the end steel plate 340 to form the protective sleeve assembly 300 with a rectangular structure.

2. After prefabrication is completed, carrying out on-site transfer:

2.1, setting of prestressed tendons:

firstly, the prestress rib 400 penetrates through an installation groove in the wood beam 200 from one end of the wood beam 200 to the other end of the wood beam 200, then the degree of prestress of the prestress rib 400 is selected according to requirements, and the prestress rib 400 can be stretched without stretching or with a preset prestress value.

Further, if the tendon 400 is stretched, the tendon 400 is anchored on the end face of the wood beam 200, and stretching of the tendon 400 is completed; after the tensioning of the prestressed tendons 400 is completed, glue 410 is filled in the mounting groove, and the prestressed tendons 400 and the wood beams 200 are bonded to form an integral structure; the release of the prestressing force is carried out after the bonding is completed.

2.2: the wooden beams 200 with the tendons 400 are stacked and glued.

2.3: the protective sleeve assembly 300 is sleeved on the end face of the wood beam 200, the clamping plates 310 and 320 are respectively arranged on the upper end face and the lower end face of the wood beam 200, the tensioning bolts 330 penetrate through the second mounting grooves of the wood beam 200 to fix the clamping plates on the upper end and the lower end of the wood beam 200, and the wood beam 200 is clamped by the clamping plates 310 and 320.

The first side plate 350 and the second side plate 360 are located on opposite side walls of the wooden beam 200 to restrain and protect the wooden beam 200.

The end steel plate 210 is sleeved on the tendon 400, the end steel plate 210 is connected with the wood beam 200 through the tendon 400, and the tendon 400 is anchored.

2.5: the steel column 100 and the wood beam 200 are welded through the connecting assembly 500, one end of the connecting assembly 500 is welded with the steel column 100, and the other end is welded with the end steel plate 310, so that the rigid connection between the steel column 100 and the wood beam 200 is completed.

The sequence of steps 2.1-2.5 is merely illustrative, and the specific assembly sequence is not limited to the above, and may be specific according to practical situations.

The node structure of the prestress wood beam-steel column connection and the construction method thereof can realize the rigid connection between the wood beam and the steel column; meanwhile, an arrangement mode of prestress is designed, the prestress can be effectively combined with a rigid connection mode in the scheme, the prestress ribs are rigidly connected with end steel plates on the wood beams, and meanwhile connection operation is not affected.

Secondly, the scheme can reduce the maximum bending moment born by the large-span wood beam by the method of rigid node connection and prestressing force application in the wood beam, improve the bending resistance bearing capacity of the wood beam and effectively reduce the section height of the wood beam.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The node structure for connecting the prestressed wood beam and the steel column comprises the steel column and the wood beam, and is characterized by further comprising a protective sleeve, prestressed tendons and a connecting assembly, wherein the wood beam and the steel column are mutually perpendicular and are directly and rigidly connected through the connecting assembly; the prestress rib transversely penetrates through the wood beam to be arranged and is bonded with the wood beam to form a whole, prestress is provided for the wood beam, the protection sleeve component is sleeved at the end part of the wood beam, opposite to the steel column, and a protection structure and clamping force are formed on the end face of the wood beam.

2. The node structure of a prestressed wood beam-steel column connection of claim 1, wherein a plurality of node connection locations are distributed on the steel column, and stiffening baffles are respectively arranged at the node connection locations.

3. The node structure of a prestressed wood beam-steel column connection according to claim 1, wherein the protective sleeve assembly comprises an end steel plate, a first clamping plate, a second clamping plate, a first side plate and a second side plate, the first clamping plate and the second clamping plate are oppositely arranged and connected with the end steel plate, and the first side plate and the second side plate are oppositely arranged and connected with the end steel plate to form a protective sleeve assembly with a rectangular structure, and the protective sleeve assembly is sleeved at the end of the wood beam and fixed with the wood beam.

4. A prestressed wood beam-steel column connected node structure according to claim 3, wherein the first clamping plate and the second clamping plate are transversely arranged on two end faces of the wood beam and are connected with end steel plates, locking pieces are arranged on the first clamping plate and the second clamping plate in a matched mode, and the first clamping plate, the second clamping plate and the wood beam are clamped through the locking pieces.

5. A prestressed wood girder-steel column coupled node structure according to claim 3, wherein said first and second side plates are laterally disposed on both sidewalls of the wood girder and coupled with the end steel plates.

6. A prestressed wood-steel column connected node structure according to claim 3, wherein said end steel plates are disposed on the end faces of the wood beams opposite to the steel columns and are rigidly connected directly to the wood beams by connecting members.

7. A prestressed wood girder-steel column connected node structure according to claim 3, wherein said connection assembly comprises steel corbels and H-section steel, said steel corbels and H-section steel are bolt welded to form an integral structure, one end of which is rigidly connected to a stiffening spacer on the steel column, and the other end of which is rigidly connected to an end steel plate.

8. A prestressed wood girder-steel column connected node structure according to claim 3, wherein the ends of said tendons are disposed transversely through the wood girders and anchored to the end steel plates.

9. The node structure of a prestressed wood girder-steel column connection according to claim 1, wherein the prestressed tendons are integrally formed with the wood girders by bonding.

10. The construction method of the node structure of the prestress wood beam-steel column connection is characterized by comprising the following steps of:

1: prefabricating the wood beam, the steel pipe column and the protective sleeve component:

2: after prefabrication is completed, assembly is carried out on site:

2.1: transversely penetrating a prestress rib from one end of a wood beam to the other end of the wood beam through an installation groove in the wood beam, and anchoring the prestress rib on the wood beam for tensioning;

2.2: glue is filled in the mounting groove, the prestress ribs and the wood beams are bonded to form an integral structure, and prestress is released after bonding is completed;

2.3: a plurality of wood beams with the prestressed tendons are arranged in a stacking way and are glued;

2.4: the protection sleeve assembly is sleeved on the end face of the wood beam, opposite to the steel column, clamping plates in the protection sleeve assembly are respectively arranged at the upper end and the lower end of the wood beam, and vertically penetrate through the wood beam in cooperation with tensioning bolts, so that the clamping plates are fixed at the upper end and the lower end of the wood beam;

2.5: penetrating the end of the prestressed tendon through the end steel plate and anchoring the prestressed tendon to the prestressed tendon;

2.6: and welding the steel pipe column and the end steel plate on the wood beam through the steel corbel to finish the rigid connection between the steel pipe column and the wood beam.