CN209989932U - Assembled steel bamboo wood composite structure system suitable for multi-story and high-rise buildings - Google Patents
Assembled steel bamboo wood composite structure system suitable for multi-story and high-rise buildings Download PDFInfo
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- CN209989932U CN209989932U CN201920693922.3U CN201920693922U CN209989932U CN 209989932 U CN209989932 U CN 209989932U CN 201920693922 U CN201920693922 U CN 201920693922U CN 209989932 U CN209989932 U CN 209989932U
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- 239000002023 wood Substances 0.000 title claims abstract description 114
- 239000011425 bamboo Substances 0.000 title claims abstract description 101
- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 66
- 235000017491 Bambusa tulda Nutrition 0.000 title claims abstract description 66
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 66
- 241001330002 Bambuseae Species 0.000 title claims abstract description 65
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 41
- 239000010959 steel Substances 0.000 title claims abstract description 41
- 239000002131 composite material Substances 0.000 title claims description 59
- 239000000463 material Substances 0.000 claims description 15
- 238000010276 construction Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 230000035939 shock Effects 0.000 abstract description 4
- 238000009417 prefabrication Methods 0.000 abstract description 3
- 230000008521 reorganization Effects 0.000 abstract description 3
- 238000010923 batch production Methods 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 241000209128 Bambusa Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to an assembled steel bamboo wood integrated configuration system that is fit for many high-rise buildings, including reorganization bamboo post, the compound I-beam of steel bamboo, quadrature veneer wood shear force wall, quadrature veneer wood floor panel, the compound I-beam of steel bamboo, form the frame construction of beam column bearing through beam column connected node and beam connecting piece semi-rigid connection between the reorganization bamboo post, connect through first L type connecting piece, oblique connecting piece, a style of calligraphy connecting piece respectively between the quadrature veneer wood shear force wall, quadrature veneer wood shear force wall end part is respectively through second L type connecting piece, the angle connecting piece is connected with quadrature veneer wood panel and is increased anti lateral rigidity. The utility model has the advantages that: green, can make full use of bamboo wood and steel's performance advantage, connected node all can be through bolt and nail connection, and it is convenient to be under construction, and wall body bearing capacity, shock resistance are strong, and structural arrangement is nimble, can satisfy the standardized prefabrication of batch production, is applicable to many high-rise assembled and builds.
Description
Technical Field
The patent relates to bamboo wood assembled has beam slab column structure, especially relates to an assembled steel bamboo wood integrated configuration system who is fit for many high-rise buildings.
Background
At present, the fabricated structure taking concrete and steel as main raw materials has the following defects: (1) the self weight is large, and the earthquake action is large; (2) the transportation is inconvenient; (3) high energy consumption, large pollution and relatively high cost. The search for sustainable development, environment-friendly building materials and the research of novel structural systems are a new direction of the development of the current civil field, bamboo resources in China are very rich, the bamboo materials are currently accepted as green, high-strength, environment-friendly and renewable ideal building materials, but because the influences of the irregularity of the geometric dimensions of the wood and the bamboo and the mechanical properties of the bamboo on the types, the growing geographic positions and different parts are large, the requirements of modern buildings are difficult to meet by using the raw wood and the raw bamboo, along with the rapid development of adhesives, the industrialized wood products and the bamboo products are developed vigorously, the industrial bamboo products not only have superior, uniform and stable mechanical properties, but also have external dimensions capable of meeting the requirements of modern buildings, but the elastic modulus of the industrial bamboo products is small, the strength is often large, the deformation of components cannot meet the requirements of normal use, and the steel has large strength and high elastic modulus, the steel, bamboo and wood composite structure has good energy dissipation and shock absorption capabilities due to high strength, good deformation capability, light weight and small earthquake action, but the building layer number is always limited due to poor fire resistance limit and bearing capacity of the wood structure, which is a great obstacle to the development of modern steel, bamboo and wood composite structures.
SUMMERY OF THE UTILITY MODEL
This patent provides an assembled steel bamboo wood integrated configuration system that is fit for many high-rise buildings to solve traditional bamboo wood structure spatial arrangement difficulty, assemble loaded down with trivial details and layer height restriction problem.
The technical scheme of this patent:
the assembled steel-bamboo-wood combined structure system suitable for the multi-story and high-rise buildings comprises recombined bamboo columns 2, steel-bamboo composite I-beams 5, orthogonal laminated wood shear walls 3 and orthogonal laminated wood floor panels 4; the steel-bamboo composite I-beam 5 comprises H-shaped steel 53 and recombined bamboo 52 connected to the outer side of a flange plate of the H-shaped steel 53;
the steel-bamboo composite I-beam 5 and the upper and lower recombined bamboo columns 2 are connected through beam-column connecting nodes 8, and the intersected steel-bamboo composite I-beam 5 is connected through beam-beam connecting pieces 7 respectively connected with webs of the steel-bamboo composite I-beam 5; the orthogonal glued wood floor panel 4 is paved on the steel bamboo composite I-beam 5; the orthogonal laminated wood shear wall 3 is positioned between the steel-bamboo composite I-beam 5, and the bottom end of the orthogonal laminated wood shear wall is positioned on the orthogonal laminated wood floor panel 4; the two orthogonal laminated wood shear walls 3 which are not on the same plane are connected through a first L-shaped connecting piece 331, the two orthogonal laminated wood shear walls 3 which are on the same plane and are positioned at the upper part and the lower part of the same steel-bamboo composite I-beam 5 are connected through a straight-line-shaped connecting piece 333 striding over the steel-bamboo composite I-beam 5, and the bottom of each orthogonal laminated wood shear wall 3 is connected with an orthogonal laminated wood floor panel 4 through a second L-shaped connecting piece 342.
As a further improvement on the fabricated steel-bamboo-wood composite structure system, the beam-column connection node 8 comprises two column backing plates 82 connected to the upper end and the lower end of the sleeve 83, a cross-shaped column connection plate 81 connected to the upper portion and the lower portion of the two column backing plates 82, and a beam connection steel plate 84 connected between the two column backing plates 82 and extending out of the column backing plates 82, wherein a through hole is formed in the cross-shaped column connection plate 81, and the beam connection steel plate 84 is connected with a web plate of the H-shaped steel 53 in the steel-bamboo composite i-beam 5 through a bolt; the end part of the recombined bamboo column 2 is provided with a cross groove and a bolt hole vertical to the cross groove; the cross-shaped column connecting plate 81 extends into a corresponding cross groove at the end part of the recombined bamboo column 2, and a bolt penetrates through the bolt hole through hole to connect the column connecting plate 81 with the recombined bamboo column 2.
As a further improvement of the fabricated steel-bamboo-wood composite structure system, gaps are reserved between the orthogonal laminated wood shear walls 3 on the same plane and are connected through the inclined connecting pieces 332, and the orthogonal laminated wood shear walls 3 with two perpendicular surfaces are connected with the orthogonal laminated wood floor panel 4 at the bottom through the corner connecting pieces 341.
As a further improvement of the assembled steel-bamboo-wood combined structure system, two oblique connecting pieces 332 are connected into an X shape by antisymmetric nails on the inner side and the outer side of the orthogonal laminated wood shear wall 3.
As a further improvement to the fabricated steel-bamboo-wood composite structure system, the exterior of the orthogonal laminated wood shear wall 3 is provided with a heat-insulating fireproof layer; and heat-insulating fireproof materials are filled on two sides of a web plate of the steel-bamboo-wood composite I-beam 5 at the inner wall, and bamboo materials are filled outside the web plate of the steel-bamboo-wood composite I-beam 5 at the outer wall.
The steel-bamboo composite I-beam and the recombined bamboo columns are connected through beam-column connection nodes and beam-beam connection pieces in a semi-rigid mode to form a beam-column bearing frame structure, the orthogonal laminated wood shear walls are connected through first L-shaped connection pieces, inclined connection pieces and straight connection pieces, the end portions of the orthogonal laminated wood shear walls are connected with the orthogonal laminated wood panel through second L-shaped connection pieces and angle connection pieces respectively to increase lateral rigidity resistance, materials which belong to the existing materials and are excellent in bearing capacity, shock resistance and fire resistance are adopted, the overall stability of the structure is further improved, the spatial arrangement of the structure is more convenient, the weak points of small lateral rigidity resistance and large displacement of the frame structure are avoided due to the excellent mechanical properties of the orthogonal laminated wood, the connection between the beam columns is simplified, and the construction is more convenient.
The steel-bamboo composite I-beam is formed by combining the recombined bamboo and the H-shaped steel by using an adhesive or a connecting piece, the bolt holes on the web plate of the H-shaped steel are pre-drilled in advance, and the end parts of the recombined bamboo columns are pre-drilled with the cross slots and the bolt holes, so that the prefabrication is met, and the construction is convenient.
The beam column connected node includes two criss-cross column connection boards, two column backing plates, sleeve, beam connection steel plate etc., the compound I-beam of steel bamboo of beam connection steel plate's quantity according to required connection is confirmed, criss-cross column connection board respectively with the reorganization bamboo column connection that corresponds the position, beam connection steel plate is connected with the compound I-beam of steel bamboo that corresponds the position.
The wall corners between the crossed orthogonal laminated wood shear walls and the orthogonal laminated wood floor panels at the bottom are connected through corner connecting pieces. When the orthogonal laminated wood shear walls are arranged side by side, a certain gap is left between the walls or the walls are connected through oblique connecting pieces when the walls are positioned at two sides of the recombined bamboo columns. The two oblique connecting pieces are connected by the flush antisymmetric nails inside and outside the orthogonal laminated wood shear wall to form an X shape, so that the seismic energy can be dissipated in two directions.
The material of support between the roof beam is industry laminated wood or bamboo timber, and bamboo wood material supports the power consumption effect excellence, does benefit to the antidetonation.
The external heat-insulation fireproof layer of the orthogonal laminated wood shear wall enables the outer surface to be flush according to actual presetting, the door and window pipeline openings are preset in the orthogonal laminated wood shear wall, the window is preset in the wall body, and the connecting clamping grooves are reserved in the orthogonal laminated wood floor panel. The pre-embedded window can effectively reduce the cold bridge phenomenon.
The steel-bamboo-wood composite beam is arranged at the inner wall, and heat-insulating fireproof materials are filled on two sides of the web plate, so that the phenomenon of thermal bridge is reduced; the steel-bamboo-wood composite I-beam is arranged at the outer wall, bamboo materials are filled in the web plate close to the outer side, and the connection integrity of the external upper and lower shear walls, the floor panel and the I-beam is better through a straight-line-shaped connecting piece.
Compared with the prior art, this patent has following advantage:
green, can make full use of bamboo wood and steel's performance advantage, it is convenient to be under construction, need not on-the-spot welding, and connected node all can be connected through bolt and nail, and wall body bearing capacity, shock resistance are strong, and structural arrangement is nimble, can satisfy the standardized prefabrication of batch production, is applicable to many high-rise assembled and builds.
Drawings
FIG. 1 is a schematic view of an energy-dissipating earthquake-resistant steel bamboo-wood composite structure;
FIG. 2 is a schematic structural view of a beam-column connection node;
FIG. 3 is a cross-sectional view of a beam-column connection node;
FIG. 4 is a schematic structural view of a beam-column joint connection;
FIG. 5 is a schematic perspective view of the beam-column joint connection;
FIG. 6 is a schematic view of the structure of the beam-to-beam joint;
FIG. 7 is a schematic view of the construction of the wallboard joint;
FIG. 8 is a schematic view of an external in-line connection.
In the figure: the concrete composite wall comprises a 1-foundation, 2-recombined bamboo columns, 3-orthogonal laminated wood shear walls, 31-upper orthogonal laminated wood shear walls, 32-lower orthogonal laminated wood shear forces, 331-first L-shaped connecting pieces, 332-inclined connecting pieces, 333-straight connecting pieces, 4-orthogonal laminated wood floor panels, 5-steel bamboo composite I-beams, 51-stiffening ribs, 52-recombined bamboos, 53-H-shaped steel, 6-inter-beam supports, 7-beam connecting pieces, 8-beam-column connecting nodes, 81-column connecting plates, 82-column backing plates, 83-sleeves and 84-beam connecting steel plates.
Detailed Description
The patent is explained further below with reference to the drawings.
Referring to fig. 1, an assembled steel-bamboo-wood composite structure system suitable for multi-story and high-rise buildings comprises a recombined bamboo column 2, a steel-bamboo composite i-beam 5, an orthogonal laminated wood shear wall 3, an orthogonal laminated wood floor panel 4, an inter-beam support 6 and a roof structure.
The steel-bamboo composite I-beam 5 and the recombined bamboo column 2 are semi-rigidly connected through a beam-column connecting node 8 and a beam-beam connecting piece 7 to form a beam-column bearing frame structure. Referring to fig. 6-8, the orthogonal laminated wood shear walls 3 are connected through a first L-shaped connecting member 332, an oblique connecting member 331 and a straight connecting member 333, and the end portions of the orthogonal laminated wood shear walls 3 are connected with the orthogonal laminated wood panel 4 through a second L-shaped connecting member 342 and a corner connecting member 341 respectively to increase lateral stiffness. The partition wall of the non-bearing part can be an orthogonal glued wood wall or a domestic common wood partition wall, and the roof construction method is conventional.
The steel-bamboo composite I-beam 5 is formed by combining the recombined bamboo 52 and the H-shaped steel 53 by using an adhesive or a connecting piece, the web plate and the lower flange are pre-perforated in advance, and more steel-wood composite beams on the market can be selected as the material of the composite beam on the premise of ensuring the strength.
Referring to fig. 5, the end of the recombined bamboo column 2 is pre-grooved with cross slots, and bolt holes are pre-punched according to the positions of the through holes on the column connecting plate 81.
Referring to fig. 2-5, the beam-column connection node 8 includes two cross-shaped column connection plates 81, two column backing plates 82, a sleeve 83, and at least two beam connection steel plates 84, the number of the beam connection steel plates 84 extending out of the column backing plates is determined according to the steel-bamboo composite i-beam to be connected, and the two column connection plates are respectively connected with the upper and lower two corresponding recombined bamboo columns.
Referring to fig. 1 and 4, the installation sequence of the wall surface is: the bottom of the recombined bamboo column 2 is fixed with the foundation 1, the orthogonal laminated wood shear wall 3 is fixed, the upper end of the recombined bamboo column 2 is inserted into a beam column connecting piece, two-direction bolts of a column connecting plate 81 are connected in a staggered mode, the steel-bamboo composite I-beam 5 is erected at the top end of the shear wall, a web plate preset hole is aligned with a beam connecting steel plate 84 hole and fixed through a high-strength bolt, a certain gap is reserved between the steel-bamboo composite I-beam 5 and the recombined bamboo column in a lap joint mode, and a stiffening rib 51 is additionally arranged at the web plate at the end of the steel-bamboo composite I-beam.
Referring to fig. 6, beam-to-beam connectors 7 are disposed at four corners of a vertically intersecting steel-bamboo composite i-beam 5, and two beam-to-beam connectors 7 at two sides of the same web are integrally connected by bolts. The material of the inter-column support 6 can be wood or bamboo or can be replaced by soft steel, triangular holes flush with the web are formed in the end portion of the inter-column support 6, and the end portion of the inter-column support is vertically connected with the web of the steel-bamboo composite I-beam through bolts.
The orthogonal glued wood floor panel 4 is fixedly connected with the recombined bamboo on the flange plate of the steel-bamboo composite I-beam through wood screws. The upper end of the orthogonal laminated wood shear wall 3 is fixedly connected with the recombined bamboo on the lower flange of the steel-bamboo composite I-beam through wood screws.
Referring to fig. 7, when the two orthogonal laminated wood shear walls 3 are arranged side by side, a certain gap is left between the walls, the oblique connecting members 332 are fixed between the wall surfaces by wood screws, and the oblique connecting members are connected by means of anti-symmetric nails which are flush inside and outside the orthogonal laminated wood shear walls to form an X shape.
When the two orthogonal laminated wood shear walls are vertically arranged, the end corner connecting piece 341 is fixed at the corner 3 of the orthogonal laminated wood shear wall through a high-strength bolt, so that the integrity of the shear wall and the recombined bamboo column is enhanced; the middle first L-shaped connecting piece 331 is connected with the two shear walls through wood screws; the second L-shaped connecting member 342 is connected to the orthogonal laminated wood shear wall 3 by a wood screw, and is connected to the orthogonal laminated wood floor panel 4 by a bolt.
The external heat-preservation, heat-insulation, waterproof and fireproof layer of the orthogonal glued wood shear wall 3 enables the outer surface to be flush according to actual presetting, a door and window pipeline opening is preset in the orthogonal glued wood shear wall, a window is preset in the wall body, a connecting clamping groove is reserved in the orthogonal glued wood floor panel, and a heat-preservation, heat-insulation and waterproof layer is arranged at the lower part of the floor panel and the hollow part of a beam web plate.
Referring to fig. 8, the steel-bamboo-wood composite beam is located at the outer wall, the bamboo material filled at the outer side of the web plate of the steel-bamboo-wood composite beam is fixed on the bamboo material filled at the outer side of the web plate of the upper orthogonal laminated wood shear wall 31, the lower orthogonal laminated wood shear wall 32 and the steel-bamboo composite i-beam 5 through wood screws 333.
Claims (5)
1. An assembly type steel-bamboo-wood combined structure system suitable for multi-story and high-rise buildings comprises recombined bamboo columns (2), steel-bamboo composite I-beams (5), orthogonal laminated wood shear walls (3) and orthogonal laminated wood floor panels (4); the steel-bamboo composite I-beam (5) comprises H-shaped steel (53) and recombined bamboo (52) connected to the outer side of a flange plate of the H-shaped steel (53);
the steel-bamboo composite I-beam is characterized in that the steel-bamboo composite I-beam (5) and the upper and lower recombined bamboo columns (2) are connected through beam-column connecting nodes (8), and the crossed steel-bamboo composite I-beams (5) are connected through beam connecting pieces (7) respectively connected with webs of the steel-bamboo composite I-beams (5); the orthogonal glued wood floor panel (4) is paved on the steel-bamboo composite I-beam (5); the orthogonal laminated wood shear wall (3) is positioned between the steel-bamboo composite I-beams (5), and the bottom end of the orthogonal laminated wood shear wall is positioned on the orthogonal laminated wood floor panel (4); the two orthogonal laminated wood shear walls (3) which are not on the same plane are connected through a first L-shaped connecting piece (331), the two orthogonal laminated wood shear walls (3) which are on the same plane and are positioned at the upper part and the lower part of the same steel-bamboo composite I-beam (5) are connected through a straight-line-shaped connecting piece (333) striding over the steel-bamboo composite I-beam (5), and the bottom of each orthogonal laminated wood shear wall (3) is connected with an orthogonal laminated wood floor panel (4) through a second L-shaped connecting piece (342).
2. The assembled steel-bamboo-wood combined structure system according to claim 1, wherein the beam-column connecting joint (8) comprises two column backing plates (82) connected to the upper end and the lower end of the sleeve (83), a cross-shaped column connecting plate (81) connected to the upper portion and the lower portion of the two column backing plates (82), and a beam connecting steel plate (84) connected between the two column backing plates (82) and extending out of the column backing plates (82), wherein a through hole is formed in the cross-shaped column connecting plate (81), and the beam connecting steel plate (84) is connected with a web of the H-shaped steel (53) in the steel-bamboo composite I-beam (5) through a bolt; the end part of the recombined bamboo column (2) is provided with a cross groove and a bolt hole which is vertical to the cross groove; the cross-shaped column connecting plate (81) extends into a corresponding cross groove at the end part of the recombined bamboo column (2), and a bolt penetrates through the bolt hole through hole to connect the column connecting plate (81) with the recombined bamboo column (2).
3. The assembled steel-bamboo-wood composite structure system of claim 1, wherein a gap is arranged between the two orthogonal laminated wood shear walls (3) on the same plane and connected through the inclined connecting piece (332), and the two orthogonal laminated wood shear walls (3) vertical to each other are connected with the orthogonal laminated wood floor panel (4) at the bottom through the corner connecting piece (341).
4. An assembled steel bamboo wood composite structural system according to claim 3, characterized in that two diagonal connectors (332) are connected in an X-shape by antisymmetric nailing on the inside and outside of the cross-laminated wood shear wall (3).
5. The assembled steel-bamboo-wood composite structure system as claimed in claim 1, wherein the outside of the cross-laminated wood shear wall (3) is provided with a heat-insulating and fire-proof layer; and heat-insulating fireproof materials are filled on two sides of a web plate of the steel-bamboo composite I-beam (5) at the inner wall, and bamboo materials are filled on the outer side of the web plate of the steel-bamboo composite I-beam (5) at the outer wall.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920693922.3U CN209989932U (en) | 2019-05-15 | 2019-05-15 | Assembled steel bamboo wood composite structure system suitable for multi-story and high-rise buildings |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920693922.3U CN209989932U (en) | 2019-05-15 | 2019-05-15 | Assembled steel bamboo wood composite structure system suitable for multi-story and high-rise buildings |
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| CN209989932U true CN209989932U (en) | 2020-01-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029726A (en) * | 2019-05-15 | 2019-07-19 | 南京林业大学 | A kind of assembled steel bamboo and wood combined structure system of suitable multi-rise building |
| CN111379317A (en) * | 2020-03-26 | 2020-07-07 | 上海大学 | Joint connecting structure of laminated wood latticed shell framework |
| CN113089859A (en) * | 2021-04-12 | 2021-07-09 | 朱秦江 | Assembled leveling composite radiation energy-saving orthogonal laminated wood wall and construction method thereof |
| CN114575457A (en) * | 2022-02-22 | 2022-06-03 | 王凤林 | Steel house assembling connecting part |
| WO2022217652A1 (en) * | 2021-04-12 | 2022-10-20 | 朱秦江 | Fabricated leveling composite radiation energy-saving concrete wall and construction method therefor |
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2019
- 2019-05-15 CN CN201920693922.3U patent/CN209989932U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029726A (en) * | 2019-05-15 | 2019-07-19 | 南京林业大学 | A kind of assembled steel bamboo and wood combined structure system of suitable multi-rise building |
| CN110029726B (en) * | 2019-05-15 | 2024-04-05 | 南京林业大学 | Assembled steel bamboo wood combined structure system suitable for multi-story high-rise building |
| CN111379317A (en) * | 2020-03-26 | 2020-07-07 | 上海大学 | Joint connecting structure of laminated wood latticed shell framework |
| CN111379317B (en) * | 2020-03-26 | 2021-07-06 | 上海大学 | Joint connecting structure of laminated wood latticed shell framework |
| CN113089859A (en) * | 2021-04-12 | 2021-07-09 | 朱秦江 | Assembled leveling composite radiation energy-saving orthogonal laminated wood wall and construction method thereof |
| WO2022217653A1 (en) * | 2021-04-12 | 2022-10-20 | 朱秦江 | Fabricated leveling composite radiation energy-saving cross-laminated timber wall body and construction method therefor |
| WO2022217652A1 (en) * | 2021-04-12 | 2022-10-20 | 朱秦江 | Fabricated leveling composite radiation energy-saving concrete wall and construction method therefor |
| CN114575457A (en) * | 2022-02-22 | 2022-06-03 | 王凤林 | Steel house assembling connecting part |
| CN114575457B (en) * | 2022-02-22 | 2024-01-05 | 广东怀胜建设工程有限公司 | Connecting component is assembled in steel house |
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