Small-height #-shaped wood beam structure based on cross-shaped clamping waist tenons and mounting method of small-height #-shaped wood beam structure

Abstract

The invention relates to a small-height cross-shaped wood beam structure based on cross-shaped clamping waist tenons and an installation method thereof.The small-height cross-shaped wood beam structure comprises a first wood beam, a second wood beam, a plurality of cushion blocks and a steel plate, and the first wood beam and the second wood beam are overlapped up and down and arranged in an embedded mode; the cushion block arrays are symmetrically arranged on the two sides of the overlapping joint of the first wood beam and the second wood beam. The steel plate is attached and fixed to the bottom of the overlapped connection position of the first wood beam and the second wood beam. Compared with the prior art, smooth force transmission of the crossed wood beams in the joint area is achieved, it is guaranteed that the building clearance is not affected, the strength (especially bending resistance and transverse grain compressive strength) of the two-way wood beams at the joint can be guaranteed, the height of the joint area can be effectively controlled, and good construction convenience is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of building structures and relates to a small-height cross-shaped wood beam structure based on cross-shaped waist mortise and a mounting method thereof. BACKGROUND

[0002] To promote green and low-carbon building technology, wood structure buildings are being built. The cross-shaped beam floor system is an optimal solution for improving the bearing capacity of the wood structure building floor system and guaranteeing the visual performance of the building because of its efficient two-way force transmission and regular spatial visual effect. However, the cross-shaped beam system has dense cross nodes of wood beams, and the stress performance at the nodes needs to be guaranteed; the traditional cross beam grid node structure is complex and not compact in vision.

[0003] The mortise and tenon connection node structure of the traditional wood structure can obtain good node bearing capacity and visual effect. However, due to the relatively low industrialization degree of such nodes and the fact that the section at the mortise will cause the effective bearing area of the beam section to decrease and stress concentration at the tenon shoulder to cause wood splitting, such nodes are not widely used in modern structural engineering. The existing wood beam nodes are often strengthened by metal connecting parts (such as steel plates, bolts, and tooth plates) to improve the bearing capacity. However, due to the large difference in elastic modulus between the metal parts and the wood, the stress in the node area is often unevenly distributed. Long-term action will also cause some connecting bolts to relax, affecting the long-term performance of the node. In addition, the use of a large number of metal components continuously increases the height of the node area, further compressing the building clearance and making it difficult to meet the development needs of modern wood structure buildings. SUMMARY

[0004] The purpose of the present application is to overcome the problems of node stress and height in the prior art and provide a small-height cross-shaped wood beam structure based on cross-shaped waist mortise and a mounting method thereof.

[0005] The small-height cross-shaped wood beam structure based on cross-shaped waist mortise aims to achieve smooth force transmission of the cross wood beams in the node area and ensure that the building clearance is not affected. It can guarantee the strength of the two-way wood beams at the node (especially the bending and transverse compression strength) and effectively control the height of the node area while having good construction convenience.

[0006] The purpose of the present application can be achieved by the following technical solutions: The technical solution of the present application provides a small-height cross-shaped wood beam structure based on cross-shaped waist mortise, which comprises a first wood beam, a second wood beam, a plurality of pads, and a steel plate, wherein The first wood beam and the second wood beam are arranged in an overlapping manner. The pad array is symmetrically arranged on both sides of the overlapping connection of the first wood beam and the second wood beam. The steel plate is fixedly attached to the bottom of the overlapping connection of the first wood beam and the second wood beam.

[0007] In some embodiments, the bottom of the first wood beam is provided with a first mortise, the top of the second wood beam is provided with a second mortise, and the first mortise of the first wood beam is embedded into the second mortise and is clamped with the second wood beam.

[0008] In some embodiments, the depth of the first mortise is 1 / 2 of the height of the first wood beam, the depth of the second mortise is 1 / 2 of the height of the second wood beam, and the height of the first wood beam is equal to the height of the second wood beam.

[0009] In some embodiments, the width of the first mortise is equal to the width of the second wood beam. The width of the second mortise is greater than the width of the first wood beam, and a gap for placing a cushion block is further formed between the second mortise and the first wood beam.

[0010] In some embodiments, the sum of the width of the cushion block and the first wood beam is equal to the width of the second mortise.

[0011] In some embodiments, the cushion block includes a first cushion block, a second cushion block and a third cushion block which are placed in the second mortise and are attached to the first wood beam and the second mortise.

[0012] In some embodiments, the height of the first cushion block, the second cushion block and the third cushion block is the same and is equal to the depth of the second mortise.

[0013] In some embodiments, the length of the first cushion block, the second cushion block and the third cushion block increases in sequence, so that the third cushion block is attached to the first wood beam and the first cushion block is attached to the second wood beam.

[0014] In some embodiments, the steel plate and the first wood beam are fixedly connected by screws.

[0015] The second technical solution of the present application provides a mounting method of a small-height cross-shaped wood beam structure based on a cross-shaped clamping waist mortise, which comprises the following steps: S1: placing the second wood beam on the lower side, vertically placing the first wood beam on the second wood beam, and oppositely embedding the first mortise and the second mortise to complete the installation of the cross-shaped clamping waist mortise of the first wood beam and the second wood beam; S2: symmetrically filling the first cushion block, the second cushion block and the third cushion block into the clamping waist mortise gap in sequence from the root of the second mortise to the compressed part of the first wood beam, adjusting the position of the cushion block to tightly fill and form a stepped diffusion. S3: Attach a steel plate to the bottom surface of the first mortise in the tension area, and diagonally screw into the screw at the connection between the steel plate and the first wooden beam to form a firm connection.

[0016] Compared with the prior art, the cross-shaped clamping tenon and well-shaped wooden beam structure of the present application can control the cross-sectional height of the wooden beam without affecting the bending and compression load-bearing capacity of the wooden beam, and the main advantages of the structure are: (1) The cross-shaped clamping tenon is formed by locally cutting the bidirectional orthogonal wooden beam at the corresponding position, and the upper and lower surfaces of the wooden beam are flush after being stacked, so that the height of the wooden beam remains unchanged, further increase in the cross-sectional height is avoided, and the building use space is compressed, which is especially suitable for wooden structure buildings with limited headroom.

[0017] (2) For the tension area of the wooden beam where the cross-sectional weakening is caused by the mortise, a steel plate is attached to the bottom, and a reliable force transmission path is formed by cooperating with a diagonal self-tapping screw. When the wooden beam is bent, the tensile stress is transmitted to the steel plate through the wood and the self-tapping screw for bearing, which fully utilizes the tensile properties of steel and significantly compensates for the loss of bending capacity caused by cross-sectional weakening.

[0018] (3) In the compression area of the wooden beam transverse to the grain, a stepped pressure bearing pad is arranged to gradually expand the compression area of the wooden beam, continuously diffuse the local compression stress from the mortise, effectively relieve stress concentration, significantly improve the compression capacity of the wooden beam transverse to the grain, and enhance the bearing capacity of the joint.

[0019] (4) The well-shaped wooden beam structure is simple in structure, clear in force transmission, convenient to construct, and can effectively ensure that the bending and compression strength of the wooden beam is not affected under the condition of local cutting, thereby protecting the bearing capacity of the well-shaped beam system and having a wide range of applications. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The figure is a schematic diagram of the low-height well-shaped wooden beam structure based on the cross-shaped clamping tenon of the present application.

[0021] Figure 2 The figure is a disassembly and assembly schematic diagram of the first wooden beam and the second wooden beam.

[0022] Figure 3 The figure is a structure schematic diagram of the pad.

[0023] Figure 4 The figure is a disassembly and assembly schematic diagram of the pad, the first wooden beam and the second wooden beam.

[0024] Figure 5 The figure is a disassembly and assembly schematic diagram of the steel plate and the first wooden beam.

[0025] MARK DESCRIPTION OF THE FIGURE: 11 - First wooden beam, 12 - Second wooden beam, 2 - Pad block, 21 - First pad block, 22 - Second pad block, 23 - Third pad block, 3 - Steel plate, 4 - Screw, 51 - First tenon, 52 - Second tenon. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0027] Unless otherwise specified, the functional components or structures in the following embodiments or examples are conventional components or structures used in the art to achieve the corresponding functions.

[0028] Example 1 like Figures 1-5 As shown, a low-height grid-like wooden beam structure based on a cross-shaped tenon joint is provided, including a first wooden beam 11, a second wooden beam 12, several pads 2, and a steel plate 3. The first wooden beam 11 and the second wooden beam 12 are overlapped and inlaid. The pads 2 are symmetrically arranged in an array on both sides of the overlap connection of the first wooden beam 11 and the second wooden beam 12. The steel plate 3 is attached and fixed to the bottom of the overlap connection of the first wooden beam 11 and the second wooden beam 12.

[0029] In this technical solution, on the one hand, a cross-shaped tenon joint is used to achieve a bidirectional staggered connection of the timber beams, and tensile stress is transferred on the tension side of the timber beam joint by attaching a bottom steel plate (which can be further used with self-tapping screws). On the other hand, spacers are used to diffuse local stress on the compression side of the timber beams, ensuring the load-bearing capacity of the transverse bearing on the compression side of the timber beams. Specifically, this technical solution forms a cross-shaped tenon joint by partially cutting the beam cross section, thereby effectively controlling the cross section height of the grid timber beams; by attaching a steel plate to the tension side of the timber beam at the partially cut position and placing transverse bearing spacers on the compression side, the bending and compressive strength of the timber beams are ensured not to be affected by the cross section cutting, thus ensuring the load-bearing capacity of the grid beam system. This technical solution innovatively constructs a smooth force transfer at the bidirectional timber beam intersection, ensuring that the bending strength of the timber beams in the two orthogonal directions is not affected, and effectively controlling the cross section height of the grid timber beams, thereby maximizing the building's headroom. It is suitable for modern timber structure buildings with high requirements for the out-of-plane stiffness and load-bearing capacity of the floor structure system, but where the available building headroom is limited.

[0030] In a specific connection structure, such as Figure 2As shown, the bottom of the first wooden beam 11 is provided with a first mortise 51, the top of the second wooden beam 12 is provided with a second mortise 52, the first mortise 51 of the first wooden beam 11 is embedded into the second mortise 52 and is clamped with the second wooden beam 12. The depth of the first mortise 51 is 1 / 2 of the height of the first wooden beam 11, the depth of the second mortise 52 is 1 / 2 of the height of the second wooden beam 12, and the height of the first wooden beam 11 is equal to the height of the second wooden beam 12. The width of the first mortise 51 is equal to the width of the second wooden beam 12, and the width of the second mortise 52 is greater than the width of the first wooden beam 11, and a gap for placing the cushion block 2 is formed between the second mortise 52 and the first wooden beam 11. The sum of the width of the cushion block and the first wooden beam 11 is equal to the width of the second mortise 52.

[0031] As shown in the drawings, Figures 3-4 As shown, the cushion block 2 includes a first cushion block 21, a second cushion block 22 and a third cushion block 23 which are placed in the second mortise 52 and are attached to the first wooden beam 11 and the second mortise 52. The height of the first cushion block 21, the second cushion block 22 and the third cushion block 23 is the same and is equal to the depth of the second mortise 52. The length of the first cushion block 21, the second cushion block 22 and the third cushion block 23 increases in turn, so that the third cushion block 23 is attached to the first wooden beam 11 and the first cushion block 21 is attached to the second wooden beam 12.

[0032] As shown in the drawings, Figure 5 As shown, the steel plate 3 and the first wooden beam 11 are connected and fixed by the screw 4. Exemplarily, the screw 4 can be a self-tapping screw.

[0033] The key technologies of the present application include the following aspects: firstly, two bidirectional orthogonal wooden beams are formed into cross clamping waist mortises through local cutting at corresponding positions, the upper and lower surfaces of the beams are flush after being stacked, the beam height remains the original height, the cross section height is avoided to be increased, and the building use space is compressed; secondly, the steel plate is attached to the bottom of the cross section weakening part caused by the notch in the tensile area of the wooden beam, the tensile stress is transferred to the steel plate by cooperating with the self-tapping screw, and the bending strength of the wooden beam is guaranteed by using the tensile performance of the steel; thirdly, the stepped pressure bearing cushion block is configured in the cross grain compression area of the wooden beam, the compression area of the wooden beam is gradually expanded, the local compression stress on the compression side is diffused, the cross grain compression damage of the wooden beam is prevented from occurring too early, and the bearing capacity of the joint is affected. Thanks to the above-mentioned innovative configuration, the joint structure of the present application is simple, the force transmission is clear, the construction is convenient, the bending and compression strength of the bidirectional cross wooden beam can be effectively ensured not to be weakened under the condition of local cutting, the bearing capacity of the cross beam system is guaranteed, the net height of the floor structure system is effectively controlled, the bottom of the floor beam grid is regular and straight, and the visual effect is good.

[0034] Example 2 Based on the small-height cross-shaped mortise and tenon jointed beam structure provided in Embodiment 1, this embodiment provides a mounting method thereof, comprising the following steps: S1: placing the second beam 12 upside down, and placing the first beam 11 vertically on the second beam 12, with the first mortise 51 and the second mortise 52 oppositely fitted, to complete the mounting of the cross-shaped mortise and tenon joint of the first beam 11 and the second beam 12; S2: symmetrically filling the first, second and third pads 21, 22 and 23 into the first beam 11 in sequence from the root of the second mortise 52 to the compression of the first beam 11, and adjusting the positions of the pads to tightly fill and form a ladder-type diffusion.

[0035] S3: attaching the steel plate 3 to the bottom surface of the first mortise 51 in the tension zone, and obliquely nailing the screw 4 at the connection between the steel plate 3 and the first beam 11 to form a firm connection.

[0036] The above description of the embodiments is for the purpose of facilitating the understanding and use of the invention by those skilled in the art. Those skilled in the art can easily make various modifications to the embodiments, and apply the general principles described herein to other embodiments without creative labor. Therefore, the invention is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art based on the disclosure of the invention without departing from the scope of the invention should be within the protection scope of the invention.

Claims

1. A low height herringbone beam structure based on cross-corrugated tenons, characterized by, It comprises a first wooden beam (11), a second wooden beam (12), a plurality of cushion blocks (2), and a steel plate (3), wherein, The first wooden beam (11) and the second wooden beam (12) are arranged in a staggered manner; The cushion blocks (2) are symmetrically arranged on both sides of the overlapping connection of the first wooden beam (11) and the second wooden beam (12); The steel plate (3) is fixedly attached to the bottom of the overlapping connection of the first wooden beam (11) and the second wooden beam (12).

2. The low height herringbone girder structure according to claim 1, characterized by The bottom of the first wooden beam (11) is provided with a first mortise (51), and the top of the second wooden beam (12) is provided with a second mortise (52), and the first mortise (51) of the first wooden beam (11) is embedded in the second mortise (52) and is clamped with the second wooden beam (12).

3. The low height herringbone girder structure according to claim 2, characterized by The depth of the first mortise (51) is 1 / 2 of the height of the first wooden beam (11), and the depth of the second mortise (52) is 1 / 2 of the height of the second wooden beam (12), and the height of the first wooden beam (11) is equal to the height of the second wooden beam (12).

4. The low height herringbone girder structure according to claim 2, characterized by The width of the first mortise (51) is equal to the width of the second wooden beam (12). The width of the second mortise (52) is greater than the width of the first wooden beam (11), and a gap for placing the cushion block (2) is further formed between the second mortise (52) and the first wooden beam (11).

5. The low height herringbone girder structure according to claim 2, wherein The sum of the widths of the cushion blocks and the first wooden beam (11) is equal to the width of the second mortise (52).

6. The low height herringbone girder structure according to claim 2, wherein The cushion block (2) comprises a first cushion block (21), a second cushion block (22), and a third cushion block (23) which are placed in the second mortise (52) and are attached to the first wooden beam (11) and the second mortise (52).

7. The low height herringbone girder structure according to claim 6, characterized by The heights of the first cushion block (21), the second cushion block (22), and the third cushion block (23) are the same and are equal to the depth of the second mortise (52).

8. The low height herringbone girder structure according to claim 6, wherein The lengths of the first cushion block (21), the second cushion block (22), and the third cushion block (23) are sequentially increased, so that the third cushion block (23) is attached to the first wooden beam (11), and the first cushion block (21) is attached to the second wooden beam (12).

9. The low height herringbone girder structure according to claim 1, characterized by The steel plate (3) and the first wooden beam (11) are connected and fixed by screws (4).

10. A method of installing a low height herringbone girder structure based on the cross-shaped knee joint according to any one of claims 1 to 9, characterized in that, It comprises the following steps: S1: Place the second wooden beam (12) on the lower side, and place the first wooden beam (11) vertically thereon, and embed the first mortise (51) and the second mortise (52) oppositely, and complete the installation of the cross clamping waist mortise of the first wooden beam (11) and the second wooden beam (12); S2: At the clamping waist mortise gap, symmetrically fill the first cushion block (21), the second cushion block (22), and the third cushion block (23) into the first wooden beam (11) from the root of the second mortise (52) to the compressed part of the first wooden beam (11), adjust the position of the cushion block to make it tightly filled, and form a stepped diffusion; S3: Attach the steel plate (3) to the bottom surface of the first mortise (51) in the weakened tensile area, and obliquely screw the screws (4) at the connection between the steel plate (3) and the first wooden beam (11) to form a firm connection.

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