A cold-formed thin-walled steel-glulam composite member

Abstract

The present invention relates to a cold-formed thin-walled steel-glued laminated wood composite member, comprising a composite section beam, a transverse wood beam and a vertical wood beam. It is characterized in that the composite section beam is formed by two equal-sized Litesteel beams being kept aligned, closely attached and fixedly connected; the vertical wood beams are arranged on both sides of the web of the composite section beam, and the vertical wood beams are fixedly connected to the web of the composite section beam; the transverse wood beams are arranged outside the flanges at both ends of the composite section beam, and the transverse wood beams are fixedly connected to the flanges at both ends of the composite section beam. The present invention combines steel and wood materials, uses steel members as the skeleton and wood members as the auxiliary structure, gives full play to their respective advantages, and has a simple structural form, convenient and fast installation, and good load-bearing performance.

Description

Technical Field

[0001] The present invention relates to a structural member for construction. Background Art

[0002] With the advancement of urbanization and agricultural modernization, the construction of rural houses in China has been increasing year by year. However, there are still many problems that need to be solved, such as poor construction quality, lack of design, inconvenience and discomfort. At the same time, the actual service life of rural houses is short, frequent renovation and renewal, high energy consumption and low energy efficiency, wasting energy resources and damaging the environment. Promoting the construction of green rural houses is conducive to improving the construction quality of rural houses, enhancing the comfort and safety of rural houses, strengthening energy conservation and emission reduction in rural houses, extending the service life of rural houses, helping farmers reduce expenses and increase income, improving the livability of rural areas, accelerating the construction of beautiful villages, driving the countryside of green building materials, and promoting regional air pollution prevention, industrial structure adjustment and economic transformation and upgrading. It is imperative.

[0003] Cold-formed thin-walled steel sections have been widely used in the construction industry for more than 60 years. They can be used as main load-bearing members such as steel frames, trusses, beams and columns, and have the advantages of light weight, high strength, flexible space layout, good seismic performance and short production cycle. In recent years, with the rapid development of low-rise and multi-storey cold-formed thin-walled steel houses, the structural forms and stress conditions have become increasingly complex. Single members often cannot meet the design and use requirements. Therefore, composite cross-section members composed of multiple single members through connection forms such as self-tapping screws have emerged, and have been favored by engineers for their flexible combination forms and good mechanical properties. However, cold-formed thin-walled steel sections also have problems such as instability and easy buckling, insufficient stability and firmness in the connection between composite cross-sections, poor fire resistance and easy rusting.

[0004] As a natural lightweight material, wood has the characteristics of low production cost, low energy consumption, non-toxic and pollution-free. Compared with the carbon dioxide and energy consumption generated in the production process of materials such as concrete and cement, wood is renewable after logging, has low processing energy consumption, can be naturally degraded after being discarded, and does not pollute the environment. Glued wood processed from raw wood through industrial treatment has the advantages of unrestricted cross-sectional dimensions, dispersed defects, high available strength, free cross-sectional and member shapes, and can utilize small-diameter and inferior wood. However, when a common glued wooden beam is bent, due to the brittle failure caused by the bottom wood of the beam being pulled off first, the compressive strength of the wood is not fully utilized. On the other hand, steel is an isotropic material with high strength and the highest ductility among all building materials, but it also has some disadvantages such as easy rusting and easy buckling.

[0005] Cold-formed thin-walled steel is combined with wood to make up for the respective disadvantages of wood and steel, and to maximize their respective advantages. Existing thin-walled steel-wood combination methods mostly focus on single-limb combined sections, and the application of multi-limb combined section members is still lacking. At the same time, the steel and wood are basically connected by gluing, and the strength and combination efficiency are limited. Therefore, it is of great significance to develop new thin-walled steel-wood combined members. Summary of the Invention

[0006] The purpose of the present invention is to provide a cold-formed thin-walled steel-glued wood combined member with the advantages of simple structure, low price, convenient construction, good load-bearing performance, etc. The technical solution adopted by the present invention is as follows:

[0007] A cold-formed thin-walled steel-glued wood combined member, comprising a combined section beam, a transverse wood beam and a vertical wood beam. It is characterized in that the combined section beam is formed by two equal-sized Litesteel beams kept aligned and closely attached and fixedly connected; the vertical wood beams are placed on both sides of the web of the combined section beam, and the vertical wood beams are fixedly connected to the web of the combined section beam; the transverse wood beams are placed outside the flange at both ends of the combined section beam, and the transverse wood beams are fixedly connected to the flange at both ends of the combined section beam.

[0008] Further, the vertical wood beam has a rectangular cross-section, the width of which is equal to the inner width of the flange of the combined section beam, and the length is the same as that of the combined section beam; each vertical wood beam is provided with a groove on the side close to the web for accommodating the double-headed bolts connecting the two Litesteel beams at the corresponding position;

[0009] Further, the two vertical wood beams are penetrated with screw holes at corresponding positions, and the web of the combined section beam is also penetrated with screw holes at corresponding positions. Double-headed bolts are used to fix the two vertical wood beams to the web of the combined section beam;

[0010] Further, the transverse wood beam has a rectangular cross-section, the width of which is equal to the width of the flange of the combined section beam, and the length is the same as that of the combined section beam; vertical bolt holes are opened at the same position on the outer limb of the flange of the transverse wood beam and the combined section beam, and expansion bolts are used to fasten the transverse wood beam to the flange of the combined section beam, or the bottom surface of the transverse wood beam is adhered to the outer surface of the flange of the combined section beam with glue.

[0011] Further, the transverse wood beam has a rectangular cross-section, the width of which is equal to the width of the flange of the combined section beam, and the length is the same as that of the combined section beam; vertical bolt holes are opened at the same position on the outer limb of the flange of the transverse wood beam and the combined section beam, and expansion bolts are used to fasten the transverse wood beam to the flange of the combined section beam.

[0012] Furthermore, the transverse wooden beam has a rectangular cross-section, its width is equal to the flange width of the composite cross-section beam, and its length is the same as that of the composite cross-section beam; vertical bolt holes are opened at the same position on the outer limb of the transverse wooden beam and the flange of the composite cross-section beam, and the bottom surface of the transverse wooden beam is attached to the outer surface of the flange of the composite cross-section beam by using adhesive.

[0013] In addition, the vertical wooden beam is of a composite cross-section, which is a combination of two rectangles, that is, it is composed of an inner vertical wooden beam and an outer vertical wooden beam. The height of the outer vertical wooden beam is greater than that of the inner vertical wooden beam and is equal to the height of the composite cross-section beam. The side surface of the outer vertical wooden beam is attached to the connecting side surface of the two limbs of the flange of the composite cross-section beam, and the two are firmly connected by using expansion bolts. At the same time, the side surface of the inner vertical wooden beam is attached to the web of the composite cross-section beam. The inner vertical wooden beam is provided with a rectangular groove on the side close to the web to accommodate the double-headed bolts connecting the two Litesteel beams of the composite cross-section beam.

[0014] The present invention fully combines steel and wood, reduces the consumption of construction steel, ensures a green and beautiful appearance, and has good fire resistance and anti-corrosion performance, and is applicable to rural housing construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural cross-section view during web gluing in Specific Embodiment 1 of the present invention;

[0016] Figure 2 It is a schematic structural perspective view during web gluing in Specific Embodiment 1 of the present invention;

[0017] Figure 3 It is a schematic structural cross-section view during web bolting in Specific Embodiment 1 of the present invention;

[0018] Figure 4 It is a schematic structural perspective view during web bolting in Specific Embodiment 1 of the present invention;

[0019] Figure 5 It is an exploded schematic view of the structure in Specific Embodiment 1 of the present invention;

[0020] Figure 6 It is a schematic structural perspective view in Specific Embodiment 2 of the present invention;

[0021] Figure 7 It is an exploded schematic view of the structure in Specific Embodiment 2 of the present invention;

[0022] In the figure: 1 - expansion bolt; 2 - transverse wooden beam; 3 - composite cross-section beam; 4 - vertical wooden beam; 5 - double-headed bolt; 6 - double-headed bolt; 7 - vertical wooden beam; 8 - expansion bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following further describes the present invention in conjunction with the drawings and specific embodiments:

[0024] A cold-formed thin-walled steel-glulam composite member includes a double-leg composite section beam 3 of hollow rectangular flange channel steel (hereinafter simply referred to as the composite section beam), transverse wooden beams 2, vertical wooden beams 4, expansion bolts 1, 8, and double-headed bolts 5, 6. It is characterized in that the composite section beam 3 is composed of two equal-sized Litesteel beams kept aligned and closely attached, and is fastened and connected by double-headed bolts 5 near the root of the web. The vertical wooden beams 4 are placed on both the left and right sides of the web of the composite section beam 3, and the transverse wooden beams 2 are placed outside the upper and lower flanges of the web of the composite section beam 3. The vertical wooden beams are fixed to the web by adhesive bonding and double-headed bolts 6, and the transverse wooden beams 2 are fixed to the flanges by adhesive bonding and expansion bolts 1;

[0025] There are 2 vertical wooden beams 4, which are of rectangular cross-section. The height is slightly less than the inner height of the web of the composite section beam 3, the width is equal to the inner width of the flange, and the length is the same as that of the composite section beam 3. Two rectangular grooves are opened on the side of the vertical wooden beam 4 that is in close contact with the web of the composite section beam 3 to accommodate the double-headed bolts 5 connecting the two Litesteel beams at this position in the structure of the composite section beam 3;

[0026] The two vertical wooden beams 4 can be adhesively bonded to the web of the composite section beam 3 on the side, or there are screw holes penetrating through at the same position of the left and right vertical wooden beams 4 at regular intervals and at regular lengths. The web of the composite section beam 3 also has screw holes penetrating through at the corresponding positions, and the vertical wooden beams 4 are fixed to the web of the composite section beam 3 by double-headed bolts 6;

[0027] The transverse wooden beam 2 is of rectangular cross-section, and its width is equal to the flange width of the composite section beam 3, and the length is the same as that of the composite section beam 3. Vertical bolt holes can be opened at the same positions on the outer limbs of the transverse wooden beam 2 and the flange of the composite section beam 3. The transverse wooden beam 2 is fastened to the flange of the composite section beam 3 by expansion bolts 1, or the bottom surface of the transverse wooden beam 2 is adhesively bonded to the outer surface of the flange of the composite section beam 3;

[0028] In the second scheme of this member, the vertical wooden beam 7 is of composite cross-section, which is a combination of two rectangles, that is, composed of an inner vertical wooden beam and an outer vertical wooden beam. The height of the outer vertical wooden beam is greater than that of the inner vertical wooden beam and is equal to the height of the composite section beam 3. The side of the outer vertical wooden beam is in contact with the connecting side of the two limbs of the flange of the composite section beam 3, and the two are fastened and connected by expansion bolts 8. At the same time, the side of the inner vertical wooden beam is in contact with the web of the composite section beam 3. Two rectangular grooves are opened on the side of the inner vertical wooden beam that is in close contact with the web to accommodate the double-headed bolts 5 connecting the two Litesteel beams at this position in the structure of the composite section beam 3;

[0029] In the second scheme, the width of the transverse wooden beam 2 is equal to the sum of the width of the composite section beam 3 and the widths of the left and right outer vertical wooden beams.

[0030] The present invention is not limited to the embodiments described above. The above preferred embodiments are only for illustrating the technical solutions of the present invention, which are only illustrative and not all embodiments. All other embodiments obtained by those skilled in the art without departing from the spirit and scope of the present invention and the scope protected by the claims belong to the protection scope of the present invention.

Claims

1. A cold-formed thin-walled steel-glulam composite member, comprising a composite section beam, a transverse wooden beam and a vertical wooden beam. It is characterized in that the composite section beam is formed by two equal-sized Litesteel beams being aligned, closely attached and fixedly connected; the vertical wooden beams are placed on both sides of the web of the composite section beam, and the vertical wooden beams are fixedly connected to the web of the composite section beam; the transverse wooden beams are placed outside the outer flanges at both ends of the composite section beam, and the transverse wooden beams are fixedly connected to the outer flanges at both ends of the composite section beam; the length of the vertical wooden beams is the same as that of the composite section beam, and the vertical wooden beams are of composite sections, which are composed of the combination of two rectangles, that is, composed of an inner vertical wooden beam and an outer vertical wooden beam. The height of the outer vertical wooden beam is greater than that of the inner vertical wooden beam and is equal to the height of the composite section beam; the side surface of the outer vertical wooden beam is fitted with the two-limb connection side surface of the flange of the composite section beam, and the two are fastened and connected by expansion bolts. The side surface of the inner vertical wooden beam is fitted with the web of the composite section beam. The inner vertical wooden beam is provided with a rectangular groove on the side close to the web to accommodate the double-headed bolts connecting the two Litesteel beams of the composite section beam; the transverse wooden beam has a rectangular cross-section, and its width is equal to the sum of the width of the composite section beam and the widths of the left and right outer vertical wooden beams, and its length is the same as that of the composite section beam; vertical bolt holes are opened at the same positions on the outer limbs of the transverse wooden beam and the flange of the composite section beam, and the transverse wooden beam is fastened to the flange of the composite section beam by expansion bolts, or the bottom surface of the transverse wooden beam is pasted on the outer surface of the flange of the composite section beam by adhesive; the two vertical wooden beams are penetrated with screw holes at corresponding positions, and the web of the composite section beam is also penetrated with screw holes at corresponding positions, and the two vertical wooden beams are fixed to the web of the composite section beam by double-headed bolts.

2. The cold-formed thin-walled steel-glulam composite member according to claim 1, characterized in that: the transverse wooden beam has a rectangular cross-section, and its width is equal to the flange width of the composite section beam, and its length is the same as that of the composite section beam; vertical bolt holes are opened at the same positions on the outer limbs of the transverse wooden beam and the flange of the composite section beam, and the transverse wooden beam is fastened to the flange of the composite section beam by expansion bolts.

3. The cold-formed thin-walled steel-glulam composite member according to claim 1, characterized in that: the transverse wooden beam has a rectangular cross-section, and its width is equal to the flange width of the composite section beam, and its length is the same as that of the composite section beam; vertical bolt holes are opened at the same positions on the outer limbs of the transverse wooden beam and the flange of the composite section beam, and the bottom surface of the transverse wooden beam is pasted on the outer surface of the flange of the composite section beam by adhesive.

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