CN113775113B - Aluminum-wood composite beam and assembling method - Google Patents
Aluminum-wood composite beam and assembling method Download PDFInfo
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- CN113775113B CN113775113B CN202110925623.XA CN202110925623A CN113775113B CN 113775113 B CN113775113 B CN 113775113B CN 202110925623 A CN202110925623 A CN 202110925623A CN 113775113 B CN113775113 B CN 113775113B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
Abstract
The invention discloses an aluminum-wood composite beam and an assembling method, which belong to the field of general buildings, and comprise the following steps: an aluminum alloy i-beam, a veneer board having a width greater than the width of the beam flange, and at least one pair of corner connector sets, wherein the veneer board comprises: the beam wing plate is provided with a uniform width part, a uniform width outside extension part and a lower extension part, wherein the uniform width part of the beam wing plate is arranged on the plate surface side of a pressed flange in the aluminum alloy I-shaped beam, and the pressed flange of the aluminum alloy I-shaped beam is arranged in a laminated wood groove surrounded by the lower extension part and the uniform width part of the beam wing plate by smearing epoxy resin adhesive; the angular connecting piece is connected with the glued wood plate and the aluminum alloy I-shaped beam through ring slot rivets. The invention adopts the angular connecting piece and the epoxy resin adhesive to strengthen the connection between the aluminum alloy beam and the wood board, thereby fully ensuring the cooperative working capacity of the two; meanwhile, the stainless steel ring groove rivet is adopted to prevent electrochemical corrosion between the aluminum alloy and the common steel bolt, and can provide higher pretightening force to realize looseness prevention and vibration resistance.
Description
Technical Field
The invention belongs to the technical field of general buildings, and particularly relates to a novel aluminum-wood composite beam and an assembling method.
Background
Aluminum alloy is increasingly used in structural engineering due to its advantages of high specific strength, good corrosion resistance, beautiful appearance, reusability, etc. However, aluminum alloy materials are relatively expensive and the elastic modulus of aluminum alloys is only 1/3 of that of steel, and the problems of cost and pressure instability are challenges that limit their wide application. The successful application of the steel and concrete combined structure in China provides an important thought for solving the problems; the combined structure can respectively exert the respective advantages of the materials, and the combination of the aluminum alloy and other materials is one option for popularizing the application of the aluminum alloy. Concrete is generally used in combination with metallic materials and bears the pressure therein. However, the concrete has great weight, and the combination of the concrete and the aluminum alloy can greatly offset the light weight and high strength stress advantages of the concrete, so that the invention adopts the combination stress of the wood and the aluminum alloy to form an aluminum-wood combined structure, and the aluminum-wood combined structure can resist external force together, thereby simultaneously playing the unique advantages of the two materials.
A major challenge faced by current composite structures is the ability of the components to cooperate. The usual combined effect is achieved by shear forces of fasteners (bolts, rivets, pins, etc.), bond adhesion of concrete or adhesive. The aluminum-wood composite beam provided by the invention adopts novel connection forms such as a reinforcing part and the like to further enhance the composite effect.
Disclosure of Invention
Aiming at the problems in the background technology, the invention provides a novel aluminum-wood composite beam, which adopts ring slot rivets and adhesives to exert a combined effect together, so that the pressed glued wood and the pulled aluminum alloy beam work together. Meanwhile, in order to prevent the contact area of the upper flange of the aluminum alloy beam and the wood board from being too small and the connection strength from being insufficient, and fully exert the bearing capacity of the web plate of the aluminum alloy beam, the aluminum alloy beam is characterized by comprising: an aluminum alloy i-beam, a veneer board having a width greater than the width of the beam flange, and at least one pair of corner connector sets, wherein the veneer board comprises: the beam wing plate is provided with a uniform width part, a uniform width outside extension part and a lower extension part, wherein the uniform width part of the beam wing plate is arranged on the plate surface side of the compression flange in the aluminum alloy I-shaped beam, the two sides of the uniform width part of the beam wing plate are respectively provided with the uniform width outside extension part, and the bottom surface side of the uniform width outside extension part is provided with the lower extension part; the compression flange of the aluminum alloy I-shaped beam is arranged in a veneer groove surrounded by the lower extension part and the equal width part of the beam wing plate by smearing epoxy resin adhesive;
each pair of angle connecting piece groups comprises two symmetrically arranged angle connecting pieces, and the short limb of each angle connecting piece is attached to the web plate of the aluminum alloy I-beam and fixed with the web plate of the aluminum alloy I-beam and the short limb of the other angle connecting piece through a ring slot rivet; the long limb of each angular connecting piece is simultaneously attached to the bottom surface of the compression flange and the bottom surface of the lower extension part, the inner side of the long limb of each angular connecting piece is connected with the equal-width parts of the compression flange and the beam wing plate through ring slot rivets, and the outer side of the long limb of each angular connecting piece is connected with the lower extension part and the equal-width outer extension part through ring slot rivets.
The beam wing plate has equal width and equal thickness of the extension part outside the equal width.
The thickness of the lower extension part and the thickness of the compression flange are equal.
The width of the beam wing plate equal width part is equal to the width of the compression flange.
The width of the equal-width outer extension part and the width of the lower extension part are equal.
The minimum width of the equal-width outside extension part and the lower extension part of the glued wood board is 4 times of the aperture of the ring groove rivetd 0 。
The width of the flange of the compression flange in the aluminum alloy I-shaped beam is at least 6.5 times of the aperture of the ring groove rivetd 0 。
As shown in fig. 6, when the length of the aluminum alloy i-beam is greater than the length of the double angle connectorLAt least two ends of the combined beam are respectively provided with a pair of angle-shaped connecting piece groups; when the angle connector sets exceed a pair, the distance between adjacent angle connector setsdNot greater than the length of the angular connectorL。
When the length of the aluminum alloy I-shaped beam is smaller than the length of the angular connecting pieceLTwice as many as a pair of diagonal connectors are arranged at the long midline of the beam.
The novel aluminum-wood composite beam assembling method is characterized by comprising the following steps of:
step 1, gluing: and (3) coating epoxy resin adhesive in the plate surface and the side surface of the pressed flange of the aluminum alloy beam and the groove of the laminated wood, and assembling according to the position.
Step 2, fixing the inner sides of the long limbs of each angular connecting piece: and riveting ring groove rivets in two riveting areas on the inner sides of the long limbs of the angular connecting piece.
Step 3, fixing the short limb of the two-angle connecting piece: and (5) riveting ring groove rivets in the riveting area of the short limbs of the two-angle connecting piece.
Step 4, fixing the outer sides of the long limbs of each angular connecting piece: and riveting ring groove rivets in two riveting areas outside the long limb of the angular connecting piece.
The invention has the beneficial effects that:
1. the combined beam respectively utilizes the unique advantages of the aluminum alloy and the wood, and the aluminum alloy beam and the wood can generate combined action through the fastener and the adhesive, so that the tensile capacity of the aluminum alloy beam and the compressive property of the glued wood can be fully utilized, the wood provides lateral constraint for the aluminum alloy, the lateral stability of the aluminum alloy structure is enhanced, and the self-vibration characteristic of the aluminum alloy structure is improved. The large amount of use in engineering can help to digest the surplus productivity problem of electrolytic aluminum in China.
2. The novel connecting fastener of the stainless steel ring groove rivet is adopted for connection, so that electrochemical corrosion between the aluminum alloy and the common steel bolt is prevented, higher pretightening force can be provided, the novel connecting fastener is anti-loosening and vibration-resistant, site quick assembly can be completely realized, and the construction speed is accelerated.
3. The light material, namely the aluminum alloy and the wood are adopted, so that the advantages of light weight of the aluminum alloy and the wood are maintained, the transportation and the assembly are convenient, and the aluminum alloy frame is widely applicable to structures such as aluminum alloy frames and assembled aluminum alloy houses.
4. The connection between the aluminum alloy beam and the wood board is reinforced by adopting the angular connecting piece and the epoxy resin adhesive, so that the cooperative working capacity of the aluminum alloy beam and the wood board is fully ensured, and the key technical problem in the field of combined structures is solved.
5. The renewable building material of wood and the 100% recyclable aluminum alloy material are adopted, so that the requirements of sustainable development and green building are responded.
Drawings
FIG. 1 is a schematic view of a novel aluminum-wood composite girder of example 1;
FIG. 2 is a schematic view showing the structure of an angle connector in embodiment 1 of the present invention;
FIG. 3 is a schematic diagram showing the assembly sequence in embodiment 1 of the present invention;
FIG. 4 is a schematic illustration of the dimensions of example 2 of the present invention;
FIG. 5 is a schematic structural diagram of embodiment 3 of the present invention;
FIG. 6 is a schematic side view of embodiment 3 of the present invention;
fig. 7 is a schematic top view of embodiment 3 of the present invention.
Wherein:
the aluminum alloy I-shaped beam comprises a 1-aluminum alloy I-shaped beam body, a 2-glued wood plate, a 3-ring groove rivet, a 4-angle connecting piece, an 11-compression flange, a 12-web plate, a 21-beam wing plate equal-width part, a 22-equal-width outer side extension part, a 23-lower extension part and a 25-glued wood groove.
Description of the embodiments
The present invention will be described in further detail with reference to the accompanying drawings.
Embodiment 1 of the present invention as shown in fig. 1 to 4 includes: an aluminum alloy i-beam 1, a plywood sheet 2 having a width greater than the width of the beam flanges, and at least one pair of corner connector sets, wherein the plywood sheet 2 comprises: the beam wing plate uniform width part 21, the uniform width outside extension part 22 and the lower extension part 23, wherein the beam wing plate uniform width part 21 is arranged on the plate surface side (upper part in the figure) of the compression flange 11 in the aluminum alloy I-shaped beam 1, the uniform width outside extension parts 22 are arranged on two sides of the beam wing plate uniform width part 21, the lower extension part 23 is arranged on the bottom surface side (lower part in the figure) of the uniform width outside extension part 22, the veneer board 2 is close to the pressure action point and is far away from the pressure action point and is on the bottom surface side;
the compression flange 11 of the aluminum alloy I-shaped beam 1 is arranged in a veneer groove 25 surrounded by a lower extension part 23 and a beam wing plate equal-width part 21 by smearing epoxy resin adhesive;
the beam wing plate equal width part 21 and the equal width outside extension part 22 have the same thickness, and the lower extension part 23 and the compression flange 11 have the same thickness;
the width of the beam wing plate equal width part 21 and the width of the compression flange 11 are equal, and the width of the equal width outside extension part 22 and the width of the lower extension part 23 are equal;
each pair of angle connecting piece groups comprises two symmetrically arranged angle connecting pieces 4, the short limb of each angle connecting piece is contacted with the web 12 of the aluminum alloy I-shaped beam 1, and the short limb of each angle connecting piece is fixed with the web 12 of the aluminum alloy I-shaped beam 1 and the short limb of the other angle connecting piece through a ring slot rivet 3;
the long limb of each angular connecting piece is simultaneously attached to the bottom surface of the lower extension part 23 and the bottom surface of the compression flange 11, the inner side of the long limb of each angular connecting piece is connected with the compression flange 11 and the beam wing plate equal-width part 21 through the ring slot rivet 3, and the outer side of the long limb of each angular connecting piece is connected with the lower extension part 23 and the equal-width outer side extension part 22 through the ring slot rivet 3; the number of ring groove rivets in each riveting area is calculated in design; although the upper surface of the glued wood board is uneven due to the existence of the ring groove rivet, the problem can be solved by conventional methods such as decoration.
Normally, the angular connection 4 is made of aluminum alloy material, and if the structure bears heavy load or dynamic load, the angular connection 4 can be replaced by stainless steel material;
in the present embodiment, the glued wood board 2 is a board made of glued wood (structural glued wood), in particular parallel wood chip glued wood (Parallel Strand Lumber) or rotary cut board glued wood (Laminated Veneer Lumber); the grain-following direction of the glued board 2 is parallel to the length direction of the combined beam;
in the embodiment, the aluminum alloy I-shaped beam 1 and the glued wood board 2 are equal in length direction of the beam;
in this embodiment, the sides of the long limbs of the installed angle connector are flush with the sides of the glued board 2;
in this embodiment, when the length of the I-beam is less than the length of the angle connectorLWhen the length of the I-beam is greater than the length of the double-angle connecting piece, a pair of angle connecting piece sets are arranged at the middle line of the beam lengthLAt least two pairs of diagonal connector sets should be arranged at both ends of the composite girder. The angular connector arrangement is symmetrical along the beam length midline.
The assembly flow of embodiment 1 is as follows:
before the aluminum-wood composite beam is assembled, the aluminum alloy beam, the veneer board and the angular connecting piece are punched, all connecting holes are guaranteed to be aligned completely, the aperture is generally 0.5-1.0 mm larger than the diameter of the ring groove rivet according to the actual diameter and engineering condition of the ring groove rivet, and the machining precision of the ring groove rivet is high, so that an oversized rivet hole is not required to be reserved.
When assembling, pre-assembling is performed firstly:
the aluminum alloy beam, the glued wood and the angular connecting piece are combined according to the assembling positions, and rivets penetrate through corresponding rivet holes to be preassembled. The pre-assembly can play a role in positioning and check whether the rivet hole punched in advance meets the assembly requirement or not again.
In the position shown in fig. 3, the gluing and the locking of the ring groove rivet are then carried out, which is divided into:
step 1, gluing:
epoxy resin adhesive is coated on the upper surface and the side surface of the pressed flange of the aluminum alloy beam and in the laminated wood groove 25 (bonding area A1) and assembled according to the position.
Step 2, fixing the inner sides of the long limbs of each angular connecting piece:
riveting ring groove rivets (a riveting area A2 and a riveting area A3) of two riveting areas on the inner sides of the long limbs of the angle connecting piece 4, and particularly, the inner sides of the long limbs of the angle connecting piece are connected with the compression flange 11 of the aluminum alloy I-shaped beam 1 on the plate surface side and the veneer board 2 through the ring groove rivets 3;
step 3, fixing the short limb of the two-angle connecting piece:
the ring groove rivet of the caulking area at the short limb of the two-sided connecting piece 4 is caulking (caulking area A4), specifically, the short limb of the two-sided connecting piece 4 and the central web 12 are caulking by the ring groove rivet.
Step 4, fixing the outer sides of the long limbs of each angular connecting piece:
riveting ring groove rivets in two riveting areas (a riveting area A5 and a riveting area A6) on the outer sides of the long limbs of the angle connecting piece 4, and specifically, the outer sides of the long limbs of the angle connecting piece are connected with the veneer board 2 on the board surface side through the ring groove rivets 3;
in the present embodiment, when there are a plurality of rivets in each caulking region, the caulking order is from inside to outside (caulking region A2, caulking region A3, caulking region A5, and caulking region A6) or from flange side to non-flange side (caulking region A4).
After the assembly is completed, the aluminum-wood composite beam needs to be kept stand for a certain time (generally 24 hours) to ensure that the epoxy resin adhesive fully plays a role.
So far, the novel aluminum-wood composite beam is assembled.
In this embodiment, the plate thickness locked by the ring groove rivets (the caulking area A2 and the caulking area A3) passing through the plywood, the aluminum alloy beam and the angle connector (the inside of the long limb of the angle connector) is increased compared with the web, and should be changed to a longer model.
In fig. 3, each of the caulking region A2, the caulking region A3, the caulking region A4, the caulking region A5, and the caulking region A6 is a ring groove rivet of one caulking region, and the ring groove rivet 3 used is a stainless steel ring groove rivet.
In embodiment 2 of the present invention shown in fig. 4, undescribed portions are the same as in embodiment 1,
at least one row of (width direction) ring groove rivets 3 is arranged in the riveting area of each ring groove rivet, and each row comprises at least one ring groove rivet 3;
as a rule of design, the number of rows of ring groove rivets per rivet zone should be uniform in each pair of corner connector sets, and the rows are equally spaced in the same width plane.
The minimum width of the equal-width outside extension 22 and the lower extension 23 of the glued wood board 2 is 4 times of the aperture of the ring groove rivetd 0 ；
The flange width of the compression flange 11 in the aluminum alloy I-beam 1 is at least 6.5 times of the diameter of the ring groove rivetd 0 ；
When more than one ring groove rivet 3 is provided in a single row in each rivet joint region, the flange width of the pressed flange 11, the minimum width of the equal-width outside extension 22 in the plywood 2 and the minimum width of the lower extension 23 in the plywood 2 are increased by 2.5 d 0 (between the axes of the rivet holes).
When the composite beam is located at the side beam position, the space is not enough for the symmetrical arrangement of the veneer boards about the aluminum alloy beam, the two angle connectors 4 in the veneer boards 2 and each pair of angle connector groups can be arranged asymmetrically, but the width of the equal width outside extension 22 and the lower extension 23 of the veneer boards near the edge side is at least 4d 0 The width of the long limb of the corner connector 4 near the edge is at least 7.25d 0 。
In embodiment 3 of the present invention shown in fig. 5 to 7, the undescribed portion is the same as embodiment 1,
comprising the following steps: the aluminum alloy I-shaped beam 1, a glued wood board 2 with the width larger than the width of the beam flange and a tri-diagonal connecting piece set; the tri-diagonal corner connector sets are spaced apart along the length of the beam, and when designed, the distance between each adjacent corner connector set in the composite beamdThe quantity and quantity are according to the actual engineering conditionCalculated but should not generally be greater than the length of the angle connectorLTwo ends of the combined beam (two ends in the length direction of the beam) are provided with a pair of angle-shaped connecting piece groups; the width of the glued wood extending out of the beam flange is symmetrical with respect to the aluminum alloy beam flange, and the width is required to meet that at least two rows of parallel ring groove rivets can be arranged.
The multi-diagonal connector sets are installed in the order of firstly installing two diagonal connector sets at two ends respectively and then installing each diagonal connector set one by one from the middle to the two ends; meanwhile, although in the present embodiment, two pairs of angle connector groups are provided at the edges of the aluminum alloy i-beam 1, it is easy to understand that a space for installing the beam-column joint of the aluminum alloy i-beam 1 may be left at the edges in the longitudinal direction of the beam if necessary, but a pair of angle connector groups are provided as close to the edges of the space as possible.
Each riveting area in each diagonal connecting piece group is connected with the aluminum alloy I-shaped beam 1 and the veneer board 2 through three rows of ring groove rivets 3; and the ring groove rivets 3 of each riveting region are provided with two rows of ring groove rivets 3 side by side, because of the length of the tri-diagonal connector set in the present embodimentLThe number and the positions of the ring groove rivets in the riveting areas at the corresponding positions are equal, so that the number and the installation sequence of the ring groove rivets in each riveting area are described by taking a single riveting area of a pair of angle-shaped connecting piece groups as an example, in the single riveting area, in order to reduce the pretightening force loss of the ring groove rivets, the locking sequence of the rivets in assembly should be paid attention, and according to a large number of experiments and related research results, the locking sequence of the ring groove rivets in each riveting area is carried out according to the principle of 'first center, then two sides and along opposite angles'; taking the riveting area a51 of fig. 7 as an example, first, ring groove rivets of B51 and B52 (located at the center) are sequentially installed, then ring groove rivets of B53 and B54 (located at both sides and diagonal) are sequentially installed, and finally ring groove rivets of B55 and B56 (located at both sides and the other diagonal) are sequentially installed.
In actual installation, the ring groove rivets of each row are required to be installed at the same time, and then the ring groove rivets of the other row are installed, namely, each row repeats the step 2 and the step 3 in the embodiment 1 until the ring groove rivets of all rows are installed, and the assembly of the diagonal connecting piece is completed.
The order of installation of the rivets for each pair of corner connector sets is known in the art as being riveted and is readily understood in the prior art designs, and therefore the description above is merely exemplary, and may be appropriately adjusted in practice to the specific shape of the plywood sheet 2.
Claims (4)
1. An aluminum-wood composite girder, comprising: the aluminum alloy I-shaped beam (1), a veneer board (2) with the width larger than the width of the beam flange and at least one pair of angle connecting piece groups, wherein the veneer board (2) is a board made of the veneer board, and the veneer board (2) comprises: the beam wing plate uniform width part (21), the uniform width outer extension part (22) and the lower extension part (23), wherein the beam wing plate uniform width part (21) is arranged on the plate surface side of the compression flange (11) in the aluminum alloy I-shaped beam (1), the uniform width outer extension part (22) is arranged on two sides of the beam wing plate uniform width part (21), and the lower extension part (23) is arranged on the bottom surface side of the uniform width outer extension part (22); the compression flange (11) of the aluminum alloy I-shaped beam (1) is arranged in a laminated wood groove (25) surrounded by the lower extension part (23) and the beam wing plate equal-width part (21) by smearing epoxy resin adhesive; the thickness of the beam wing plate equal-width part (21) and the thickness of the equal-width outer extension part (22) are equal; the thickness of the lower extension part (23) is equal to that of the compression flange (11);
each pair of angle connecting piece groups comprises two symmetrically arranged angle connecting pieces (4), and the short limb of each angle connecting piece is attached to the web (12) of the aluminum alloy I-shaped beam (1) and fixed with the web (12) of the aluminum alloy I-shaped beam (1) and the short limb of the other angle connecting piece through a ring slot rivet (3); the long limb of each angular connecting piece is simultaneously attached to the bottom surface of the compression flange (11) and the bottom surface of the lower extension part (23), the inner side of the long limb of each angular connecting piece is connected with the compression flange (11) and the beam wing plate equal-width part (21) through the ring groove rivet (3), and the outer side of the long limb of each angular connecting piece is connected with the lower extension part (23) and the equal-width outer side extension part (22) through the ring groove rivet (3); the angular connecting piece (4) is made of aluminum alloy material;
the width of the beam wing plate equal width part (21) is equal to the width of the compression flange (11); the width of the equal-width outer extension part (22) is equal to the width of the lower extension part (23); the minimum width of the medium-width outside extension part (22) and the lower extension part (23) of the glued wood board (2) is 4 times of the aperture of the ring groove rivetd 0 The method comprises the steps of carrying out a first treatment on the surface of the The side surfaces of the long limbs of the installed angle-shaped connecting piece are flush with the side surfaces of the glued wood board (2);
when the composite beam is positioned at the side beam position, the two angular connectors (4) in the glued wood board (2) and each pair of angular connector groups are asymmetrically arranged, the width of the equal width outer extension part (22) and the width of the lower extension part (23) of the glued wood board close to the edge side are at least 4 timesd 0 The width of the long limb of the angle connecting piece (4) near the edge side is at least 7.25 timesd 0 The method comprises the steps of carrying out a first treatment on the surface of the The combined beam fully utilizes the tensile capacity of the aluminum alloy beam and the compressive property of the glued wood, and the wood provides lateral constraint for the aluminum alloy, so that the lateral stability of the aluminum alloy structure is enhanced, and the self-vibration characteristic of the aluminum alloy structure is improved;
the flange width of the pressed flange (11) in the aluminum alloy I-shaped beam (1) is at least 6.5 times of the diameter of the ring groove rivetd 0 。
2. An aluminium-wood composite beam according to claim 1, characterized in that when the length of the aluminium alloy i-beam (1) is greater than the length of the double angle connection (4)LAt least two ends of the combined beam are respectively provided with a pair of angle-shaped connecting piece groups, and the distance between the adjacent angle-shaped connecting piece groupsdNot greater than the length of the angular connectorL。
3. An aluminium-wood composite beam according to claim 1, characterized in that when the length of the aluminium alloy i-beam (1) is smaller than the length of the angle jointLTwice as many as a pair of diagonal connectors are arranged at the long midline of the beam.
4. A method of assembling an aluminum-wood composite girder as claimed in claim 1, comprising:
step 1, gluing: epoxy resin adhesive is smeared in the plate surface and the side surface of the pressed flange of the aluminum alloy beam and the glued wood groove (25) and is assembled according to the position;
step 2, fixing the inner sides of the long limbs of each angular connecting piece: riveting ring groove rivets in two riveting areas on the inner sides of the long limbs of the angular connecting piece (4);
step 3, fixing the short limb of the two-angle connecting piece: riveting ring groove rivets in a riveting area at the short limb of the two-angle connecting piece (4);
step 4, fixing the outer sides of the long limbs of each angular connecting piece: and (3) riveting ring groove rivets in two riveting areas outside the long limb of the angular connecting piece (4).
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| CN202110925623.XA CN113775113B (en) | 2021-08-12 | 2021-08-12 | Aluminum-wood composite beam and assembling method |
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| CN202110925623.XA CN113775113B (en) | 2021-08-12 | 2021-08-12 | Aluminum-wood composite beam and assembling method |
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| CN111877640A (en) * | 2020-09-09 | 2020-11-03 | 河南工业大学 | Assembled steel-concrete composite beam connected by perforated steel plates and manufacturing method |
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