CN104499579A - Inserting plate type cross grain enhanced wood structure mortise and tenon joint - Google Patents

Abstract

The invention discloses a plug board type cross grain reinforced wood structure mortise and tenon joint, which comprises a wood column, a wood beam, a plug board type high-strength material for tenon reinforcement and a wood pin, wherein the wood column and the wood beam are connected in a tenon mortise joint mode; the wood beam is provided with a notch on the tenon along the height direction of the wood beam and is communicated along the height direction of the wood beam, and the notch is arranged inside the tenon or on two sides of the tenon or both inside and two sides of the tenon are arranged; the inserting plate type high-strength material for tenon reinforcement is inserted into the notch, the high-strength direction of the inserting plate type high-strength material for tenon reinforcement is consistent with the height direction of the wood beam, the inserting plate type high-strength material for tenon reinforcement is wood or bamboo, and the surface of the inserting plate type high-strength material for tenon reinforcement is coated with an adhesive; the inserting plate type high-strength material for tenon reinforcement is connected with the wood beam tenon into a whole through a wood pin bolt. The method is mainly used for reinforcing and enhancing the mortise and tenon joints of the traditional wood structure building.

Description

Plug-in horizontal grain reinforced wood structure mortise and tenon joints

technical field

The invention relates to the technical field of building structure engineering, in particular to a mortise and tenon joint of a board-type transverse grain reinforced wood structure.

Background technique

my country's wooden structure buildings have a long history and are distributed all over the country. Wood structure buildings account for more than 50% of all ancient buildings. Its excellent techniques have extremely high historical, cultural relics, artistic and scientific values. The most notable feature of the traditional wooden structure is that the frame composed of columns and beams adopts the connection form of mortise and tenon. As early as 7,000 years ago, a large number of tenon and tenon joints of wooden structures were found in the Hemudu site. Subsequent wooden components of ancient Chinese wooden buildings Mortise and tenon joints are commonly used. Mortise and tenon means that according to the needs of the connection of the components, the end of one component is made into a tenon, and the junction of the other component is made into a mortise, and then the components are connected through the combination of these two parts. Developed to today's modern wooden structure, the structural form is constantly changing, and the performance is getting better and better. In traditional wood structure mortise and tenon joints, the mortise head pierced inside the mortise mainly transmits the load acting on it to the column through its transverse grain pressure bearing performance, so high transverse grain pressure bearing performance can be guaranteed. Under the action of external force, the mortise always maintains a relatively tight combination with the inner wall of the mortise, and through friction and mechanical rotation, it dissipates energy, and finally achieves the purpose of good shock absorption and anti-seismic.

Due to our country's traditional living habits, there are a large number of wood-frame load-bearing buildings such as wooden structures, brick-wood frame structures, and civil-wood structures in vast rural areas. Because these buildings are self-occupied by residents and have not undergone formal seismic design, they often cause a large number of casualties and economic property losses during earthquakes. The damage of these building structures in earthquakes is often caused by the damage of joints. Due to these The destruction of natural forces, coupled with various human factors, and the inherent defects and deficiencies of the wood itself, after the tenon and mortise contact extrusion deformation, the width of the mortise increases and the height decreases, and the width of the mortise increases. The connection tightness of the mortise decreases, thereby reducing the flexural performance of the mortise and tenon connection joints. The common failure modes include the expansion of the mortise, the pull out of the mortise, the breakage of the root of the mortise, the shear failure of the mortise, and the crushing of the transverse grain of the mortise. The most direct consequence is the reduction of structural stability and the increase of lateral displacement of the frame under the action of horizontal cooperation, thereby increasing the damage of the structure until it collapses. But at the same time, with the transformation of the supply relationship of my country's timber resources, the current timber resources for the timber industry have transitioned from traditional natural forests to artificial forests. Compared with natural forest timber resources, the proportion of young timber in these timbers is large and the Fast speed, short cycle time, low density, poor mechanical properties, especially low cross-grain pressure bearing performance, and the lack of wood itself exacerbates the lack of performance of mortise and tenon joints. As a commonly used mortise and tenon structure for wood structure joints, it is difficult to meet the requirements of relevant national standards and regulations by using commonly used wood on the market, and it is even more unable to meet the seismic requirements of building buildings in high-intensity areas. Therefore, the reinforcement of tenon and tenon joints appears to be Because it is important.

The commonly used reinforcement methods for traditional wood structure mortise and tenon joints mainly include the following:

1. The nail reinforcement described in "An energy-dissipating nail for earthquake resistance of a wooden structure (Patent No. 2013200120080)";

2. "A mortise and tenon joint of a large wooden structure of ancient buildings reinforced by flat steel (Patent No. 200720032298.X)", "A steel-wood combined reinforcement device for wooden components of ancient buildings (Patent No. 2014201110165)", " Reinforcement device for side-span mortise and tenon joints of ancient building wooden structures (patent number 200920108275.1)", "reinforcing device for mortise and tenon joints in the ceiling of ancient building wooden structures (patent number 200920108276.6)", "for ancient building wooden structures Reinforcement device for middle-span mortise and tenon joints (Patent No. 200920108277.0)", and flat steel reinforcement described in "Aseismic Reinforcement of Flat Iron with Movable Bolt Holes for Wooden Structure Joints (Patent No. 201020625251.6)";

3. The arc-shaped steel plate reinforcement described in "A wood structure mortise and tenon joint reinforced by energy-consuming arc-shaped steel plate (Patent No. 201120137388.1)";

4. Reinforcement of metal node fasteners described in "A Reinforcement and Energy-Dissipating Shock Absorbing Device for Wooden Structure Mortise and Tenon Joints (Patent No. 201320561955.5)";

5. The carbon fiber wrapping reinforcement described in "A mortise and tenon joint of a large wooden frame of an ancient building wooden structure reinforced by carbon fiber cloth (Patent No. 200720032300.3)".

Most of these reinforcement methods have the following disadvantages:

1. The nails, flat steel, curved steel plate, metal gusset plate, and carbon fiber used in the reinforcement of wooden structure mortise and tenon joints are all exposed. The appearance of the reinforced joints is low in aesthetics, and the appearance of the wooden material is poorly coordinated. Lost the architectural beauty of the wooden structure itself;

2. From the appearance, using steel structural components to strengthen the wooden structure nodes will easily make people feel that the safety of wooden building structures is poor, and do not take advantage of the promotion and use of environmentally friendly low-carbon wooden structure buildings;

3. The use of metal connectors requires additional anti-rust treatment and post-use maintenance measures, and the process is cumbersome.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, and propose a mortise and tenon joint of wood structure reinforced with cross-grain. On the basis of visibility, the mechanical properties of the joints are improved.

The technical solution adopted in the present invention is: a mortise and tenon joint of wood structure reinforced with inserting board type transverse grain, including wooden columns, wooden beams, inserting board type high-strength materials for tenon head reinforcement and wooden pins, and the wooden posts and wooden beams are passed through tenon joints. Socket node connection;

The wooden beam is provided with a notch on the tenon along the height direction, and penetrates along the height direction of the wooden beam. The notch is arranged inside the tenon, or arranged on both sides of the tenon, or both inside and on both sides;

The slotted high-strength material for tenon reinforcement is inserted into the above notch, the high-strength direction of the slotted high-strength material for tenon reinforcement is consistent with the height direction of the wooden beam, the slotted high-strength material for tenon reinforcement is wood or bamboo, and the slotted high-strength material for tenon reinforcement is The surface is coated with adhesive;

The high-strength material of the tenon reinforcement is connected with the tenon and tenon of the wooden beam through wooden pins to form a whole.

As a preference, the moisture content of the high-strength insert-type material for tenon reinforcement is 2-5% lower than the moisture content of the wooden beam.

Preferably, the high-strength material for tenon reinforcement is the same as that of the wood beam species, or its mechanical properties are equal to or better than those of the wood beam species.

Preferably, the adhesive is urea-formaldehyde resin and its modified resin, phenolic resin and its modified resin, melamine-formaldehyde resin and its modified resin, polyvinyl acetate resin, polyurethane resin or epoxy resin.

In the present invention, before the mortise is inserted into the mortise, the mortise is pre-reinforced; the mortise is strengthened at the position where the mortise is engaged, and the notch is pre-cut along the height direction of the wooden beam according to the design requirements and the specifications of the reinforcement material; Before inserting the high-strength material for reinforcement, the surface of the high-strength material is coated with adhesive; after the reinforcing material is coated with adhesive and compounded with the tenon, holes can be selectively drilled at the tenon along the width direction of the wooden beam together with the high-strength material, and the wooden The pin bolt connects the high-strength board material and the tenon into a whole.

The invention is mainly used for strengthening the mortise and tenon joints of traditional wooden structures.

Beneficial effect:

The invention can effectively improve the transverse grain bearing strength of the mortise and tenon head part in the traditional wood structure mortise and tenon joint, thereby improving the performance of the tenon and tenon joint.

While effectively improving the performance of the mortise and tenon joints of the traditional wooden structure, the invention ensures the appearance effect of the building structure, does not destroy the original connection structure, and has good uniformity and coordination.

The invention has simple construction technology, low cost and can be widely used.

Description of drawings

Fig. 1 is a schematic diagram of the mortise and tenon joint structure of the present invention;

Fig. 2 is wooden beam schematic diagram one of the present invention;

Fig. 3 is wooden beam schematic diagram two of the present invention;

Fig. 4 is the third schematic diagram of the wooden beam of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1-4, a plug-in type transverse-grain reinforced wood structure mortise and tenon joint, including a wooden column 1, a wooden beam 2, a plug-in high-strength material 3 for tenon reinforcement, and a wooden pin 4, the wooden column 1 It is connected with the wooden beam 2 through tenon and tenon joints;

The wooden beam 2 is provided with a notch on the tenon along the height direction, and penetrates along the height direction of the wooden beam 2. The notch is arranged inside the tenon, or arranged on both sides of the tenon, or both inside and on both sides;

The plug-in type high-strength material 3 for tenon reinforcement is inserted into the above-mentioned notch, the high-strength direction of the plug-in type high-strength material 3 for tenon reinforcement is consistent with the height direction of the wooden beam 2, the plug-in type high-strength material 3 for tenon reinforcement is wood or bamboo, and the tenon reinforcement is used. The surface of the plug-in high-strength material 3 is coated with adhesive;

The high-strength material 3 for tenon reinforcement is tenon-connected with the wooden beam 2 through wooden pins 4 to form a whole.

The moisture content of the plug-in high-strength material 3 for tenon reinforcement is 2-5% lower than that of the wood beam 2, and the plug-in high-strength material 3 for tenon reinforcement is the same tree species as the wood beam 2, or its mechanical properties are equal to or better than the wood beam 2 tree species . The adhesive is urea-formaldehyde resin and its modified resin, phenolic resin and its modified resin, melamine-formaldehyde resin and its modified resin, polyvinyl acetate resin, polyurethane resin or epoxy resin.

It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. All components that are not specified in this embodiment can be realized by existing technologies.

Claims (3)

1. a board plug type band enhancement mode wooden construction Tenon node, is characterized in that: comprise pin, wooden frame, tenon enhancing board plug type Materials with High Strength and wooden pin, described pin is connected by tenon fourth of the twelve Earthly Branches mouth node mode with wooden frame;

Described wooden frame offers notch along short transverse on tenon, and through along wooden frame short transverse, and described notch is arranged in tenon inside or is arranged in tenon both sides or inside and both sides all has layout;

Described tenon enhancing board plug type Materials with High Strength inserts above-mentioned notch, the high-strength direction of tenon enhancing board plug type Materials with High Strength is consistent with wooden frame short transverse, tenon enhancing board plug type Materials with High Strength is timber or bamboo wood, and tenon enhancing board plug type Materials with High Strength surface is coated with bonding adhesive;

Described tenon enhancing board plug type Materials with High Strength connects into entirety by wooden pin and wooden frame tenon.

2. board plug type band enhancement mode wooden construction Tenon node according to claim 1, is characterized in that: described tenon enhancing board plug type Materials with High Strength moisture content is less than wooden frame moisture content 2-5%.

3. board plug type band enhancement mode wooden construction Tenon node according to claim 1, is characterized in that: described tenon enhancing board plug type Materials with High Strength is identical with wooden frame seeds, or mechanical property is equivalent and be better than wooden frame seeds.