CN212743137U

CN212743137U - Beam formed by combining C-shaped cold-formed thin-wall section steel and laminated wood

Info

Publication number: CN212743137U
Application number: CN202020715527.3U
Authority: CN
Inventors: 李国东; 张如玉; 韩冰; 卓于清
Original assignee: Northeast Forestry University
Current assignee: Northeast Forestry University
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-03-19
Anticipated expiration: 2030-04-30

Abstract

The beam is formed by combining C-shaped cold-formed thin-walled steel and laminated wood, and is composed of four parts, namely C-shaped cold-formed thin-walled steel (1), a wood member (2), connecting bolts (3) and a structural adhesive layer (4), wherein web plates of the two C-shaped cold-formed thin-walled steel (1) are abutted and connected through the bolts (3), the cross section is I-shaped after connection, and the structural adhesive layer (4) bonds the wood member (2) with the rectangular cross section and the steel member with the I-shaped cross section formed by the C-shaped cold-formed thin-walled steel (1) into a whole. The combined beam is characterized in that wood with good compression resistance is placed on the upper portion of the combined beam on the cross section to bear compression stress in the beam under the bending action, the middle portion and the lower portion of the combined beam are made of I-shaped combined cross sections, steel mainly bears tension, the defect that thin-wall steel is bent under compression is overcome, the material strength of the thin-wall section steel can be fully exerted, and therefore the full utilization of the strength of steel and wood materials is achieved, and the combined beam is suitable for building modern wood structures with large span requirements.

Description

Beam formed by combining C-shaped cold-formed thin-wall section steel and laminated wood

Technical Field

The utility model relates to a building engineering field.

Background

The wood has high compressive strength, but the material brittleness is large, the span of the wood beam is limited, and the wood beam is generally only suitable for building houses with small bays and small depths. The cold-formed thin-walled steel has high strength, good ductility, good plasticity and convenient processing. The steel structure is matched with the wood structure in the building process in an assembly type construction method, so that the steel beam can be adopted in the wood structure to replace the wood beam to construct the house. The utility model discloses compromise thin-walled steel and ligneous advantage, thereby give one kind and adopt the beam of the combination cross section form that cold-formed thin-walled steel and square timber make up and form, thereby the combination beam is arranged the timber that compressive property is good in the cross-section in the compression aspect of the upper portion formation combination beam, thereby compressive stress in the underbeam is in order to bear the bending action, the I-shaped combination cross-section that C type cold-formed thin-walled steel formed is adopted to the well lower part of combination beam, steel is with bearing the pulling force as the owner, the defect of thin-walled steel pressurized buckling has been avoided, can full play cold-formed thin-walled steel's material strength, thereby realize with this two kinds of material strength's of timber make full use of, in order to be applicable to the modern wood structure of great span demand, and when realizing good structural component mechanical properties, produce good economic performance effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a combination beam of a cold-formed thin-walled steel and plank combination suitable for present timber structure of riding instead of wood structure for solving existing timber structure well wooden roof beam is subject to material strength and component size, is difficult to realize great span problem.

The technical scheme of the utility model is that: the webs of the two C-shaped steels are abutted and connected through bolts to form an I-shaped section thin-wall steel beam, and a log or a square or plate made of glued wood is reliably installed on the upper flange of the I-shaped thin-wall steel beam to form the steel-wood combined engineering beam which can be used for building a modern wood structure.

The beam formed by combining the C-shaped cold-formed thin-walled steel and the laminated wood is composed of four parts, namely C-shaped cold-formed thin-walled steel 1, a wood member 2, a connecting bolt 3 and a structural adhesive layer 4, the structure of the beam is shown in figure 1, web plates of the two C-shaped cold-formed thin-walled steel 1 are abutted and connected through the bolt 3, and the cross section is I-shaped after the connection; the structural adhesive layer 4 bonds the wood member 2 with the rectangular cross section and the steel member with the I-shaped cross section formed by the C-shaped cold-formed thin-walled steel 1 into a whole.

Wherein, the C-shaped cold-formed thin-wall section steel 1 is a member formed by processing a steel plate with the thickness of 2 mm-8 mm through a C-shaped steel forming machine.

Wherein the wood member 2 is a rectangular-section member processed from raw wood or laminated wood.

The structural adhesive layer 4 is formed by hardening high-strength woodworking joint iron glue for bonding the wood member 2 and the C-shaped cold-formed thin-walled steel 1, and has the function of reliably connecting the wood member 2 and the C-shaped cold-formed thin-walled steel 1, and the thickness of the structural adhesive layer is 2-6 mm.

The utility model has the advantages that:

the utility model discloses the contribution to prior art mainly embodies in two aspects below:

1) the bending resistance and the bearing capacity of the wood beam are enhanced. The steel-wood composite beam adopting the C-shaped cold-formed thin-wall section steel has the advantages that the final damage of the member is controlled by the material strength, the whole section of the wood is pressed, and the tensile area of the common wood beam is replaced by steel with high strength and good ductility, so that the bending limit bearing capacity of the wood beam is obviously improved. The experimental data of the flexural bearing capacity of the beam test piece with the length of 3000mm and the outer package size of 100x150mm show that the steel-wood composite beam adopting the C-shaped cold-formed thin-wall section steel is improved by more than 30% compared with the flexural limit bearing capacity of the common solid laminated wood beam.

2) Improving the ductility of the wood beam. When the ordinary wood beam reaches the maximum flexural bearing capacity, the damage is sudden and has no obvious sign. The steel-wood composite beam adopting the C-shaped cold-formed thin-wall section steel has a full deformation development process when reaching the limit bearing, and has obvious visual deformation. The experimental data of the bending bearing capacity of a beam test piece with the length of 3000mm and the outer package size of 100x150mm show that when the wood beam is bent and damaged, the vertical deformation value of the beam in the span is improved by more than 120% compared with the steel-wood composite beam adopting the C-shaped cold-formed thin-wall section steel.

Drawings

Fig. 1 is a schematic structural diagram of the beam formed by combining C-type cold-formed thin-walled steel and laminated wood, wherein: c-type cold-formed thin-walled steel 1, a wood member 2, a connecting bolt 3 and a structural adhesive layer 4; a is a side elevation view of the beam, B is a top view of the beam, and C is a cross-sectional configuration of the beam.

Detailed Description

This embodiment will be described with reference to fig. 1.

The beam formed by combining the C-shaped cold-formed thin-walled steel and the laminated wood consists of four parts, namely C-shaped cold-formed thin-walled steel 1, a wood member 2, a connecting bolt 3 and a structural adhesive layer 4.

Firstly, the model of the required C-shaped cold-formed thin-wall section steel 1 needs to be selected and determined according to engineering requirements; the required dimensional specification of the wood member 2 is determined.

When the steel-wood composite beam is combined, the method is implemented according to the following working procedures: 1) the webs of the two C-shaped cold-formed thin-walled steel sections 1 are abutted and reliably connected through bolts 3. 2) And (3) polishing the outer surface of the side, connected with the wood member 2, of the C-shaped cold-formed thin-wall section steel 1 by using sand paper, and then wiping to remove rust, ash and oil stains. 3) The outer surface of the side of the wood member 2 connected with the thin-walled steel section 1 is sanded by sand paper and the wood chips and dust are removed. 4) Coating high-strength woodworking tenon iron glue with the thickness of 2-6 mm on the surfaces of the cleaned C-shaped cold-formed thin-wall section steel 1 and the cleaned wood component 2, aligning and butting glue-coated surfaces of the C-shaped cold-formed thin-wall section steel 1 and the wood component 2, and placing the butted beam on a cool and ventilated flat ground for maintenance for more than 48 hours. And finishing the processing of the steel-wood composite beam.

Claims

1. A beam formed by combining C-shaped cold-formed thin-walled steel and laminated wood is characterized in that the combined beam consists of four parts, namely C-shaped cold-formed thin-walled steel (1), a wood member (2), a connecting bolt (3) and a structural adhesive layer (4); the webs of the two C-shaped cold-formed thin-walled steel sections (1) are abutted and connected through bolts (3), and the cross sections of the two C-shaped cold-formed thin-walled steel sections after connection are in an I shape; the structural adhesive layer (4) bonds a wood component (2) with a rectangular cross section and a steel component with an I-shaped cross section formed by C-shaped cold-formed thin-walled steel sections (1) into a whole.

2. The beam formed by combining the thin-walled cold-formed C-section steel and the laminated wood as claimed in claim 1, wherein the thin-walled cold-formed C-section steel is a member formed by processing a steel plate with a thickness of 2mm to 8mm by a C-section steel forming machine.

3. A beam formed by combining C-type cold-formed thin-walled steel with laminated wood according to claim 1, wherein the wood member is characterized by being made of raw wood or laminated wood and having a rectangular sectional shape.

4. The beam of claim 1 wherein the structural adhesive layer is characterized by a high strength woodworking joint iron glue having a thickness of 2mm to 6 mm.