A prefabricated high-rigidity anti-micro-vibration steel beam shear wall structure system

Abstract

This invention provides a prefabricated high-rigidity anti-micro-vibration steel beam shear wall structure system, which meets the requirements of prefabrication, facilitates installation and construction, and ensures structural rigidity and anti-micro-vibration performance under limited clearance. It includes floor slabs, steel beams, steel-concrete composite columns, and shear walls. The steel beams include main beams and first- to third-level secondary beams. Two main beams located transversely and longitudinally connected to the same steel-concrete composite column, along with two opposing main beams, enclose a structural unit. Within the structural unit, the midpoints of adjacent main beams are connected to first-level secondary beams via hinged joints, the midpoints of adjacent first-level secondary beams are connected to second-level secondary beams via hinged joints, and the midpoints of second-level secondary beams are connected to third-level secondary beams via hinged joints. After the steel beams are installed onto the steel-concrete composite columns, the prefabricated shear walls are connected between the steel-concrete composite columns and the main beams via rigid joints.

Description

Technical Field

[0001] This invention relates to the field of building structure system technology, specifically to a prefabricated high-rigidity anti-micro-vibration steel beam shear wall structure system. Background Technology

[0002] The reinforced concrete main body + steel truss roof is a common structural form used in precision electronics factories. The design and construction technology of this structure is relatively mature and can well meet the requirements for anti-micro-vibration. It is widely used in the field of engineering construction in the precision electronics industry. This construction scheme often uses cast-in-place reinforced concrete frame or frame shear wall structure to meet the horizontal anti-micro-vibration performance of the structure, and cast-in-place reinforced concrete beam and slab structure to meet the vertical anti-micro-vibration performance of the structure.

[0003] This type of structure has the following disadvantages: 1) It is difficult to achieve assembly, making it difficult to apply in some cities with prefabricated requirements; 2) The concrete pouring and curing time is too long, affecting the construction period and commissioning time.

[0004] There are not many application cases of steel structures in domestic projects. The construction scheme mostly adopts the structural form of steel frame or steel frame + inter-column bracing to meet the horizontal micro-vibration resistance of the structure, and adopts unidirectional steel beams + deck plate & reinforced concrete cheese plate to meet the vertical micro-vibration resistance of the structure.

[0005] However, steel structures also have the following disadvantages: 1) Steel structures are lightweight structures with relatively weak component stiffness, making them difficult to apply to factories with high micro-vibration requirements; 2) Due to limitations in related technologies, reinforcing the grid beam joints in steel structures takes a significant amount of time, and the reliability of the reinforced joints also affects the structural safety. Therefore, grid beam schemes are rarely used in steel structures; 3) Steel beams in steel structures are mostly arranged in one direction. To meet micro-vibration requirements, the vertical stiffness of the structure is generally improved by increasing the beam height, which severely affects the building's clearance and functionality; 4) Steel structures often use methods such as increasing the cross-section of steel columns and inter-column bracing to improve the horizontal stiffness of the structure. For buildings with a large height-to-width ratio, simply increasing the cross-section of steel columns and inter-column bracing has limited effect on improving the horizontal stiffness of the structure, and it also affects the building's horizontal clearance and functionality. Summary of the Invention

[0006] To address the challenges of prefabricated construction of existing structures, the need for reinforcement and strengthening when using grid beam structures, and the difficulty in ensuring structural rigidity and anti-vibration performance under limited clearance conditions when applied to factories with high micro-vibration requirements, this invention provides a prefabricated high-rigidity anti-micro-vibration steel beam shear wall structure system. This system meets the requirements for prefabrication, facilitates installation and construction, and ensures structural rigidity and anti-micro-vibration performance under limited clearance conditions.

[0007] The technical solution is as follows: a prefabricated high-rigidity anti-micro-vibration steel beam shear wall structure system, comprising floor slabs, steel beams, steel-concrete composite columns, and shear walls. The steel-concrete composite columns are distributed in a matrix, and the vertically arranged steel-concrete composite columns and the shear walls are connected by horizontally arranged steel beams. The steel beams are covered by the floor slabs. The steel beams include main beams, first-level secondary beams...N-level secondary beams, where N is greater than or equal to 2. Adjacent steel-concrete composite columns are connected by rigid joints to the main beams. Two main beams located in the transverse and longitudinal directions connected to the same steel-concrete composite column and two main beams opposite to them form a square structural unit. Within the square structural unit, the midpoints of adjacent main beams are connected by hinged joints to the first-level secondary beams to form a square structure. The midpoints of adjacent first-level secondary beams are connected by hinged joints to the next-level secondary beams to form a square structure. After the steel beams are installed on the steel-concrete composite columns, the prefabricated shear walls are connected between the steel-concrete composite columns and the main beams through rigid joints.

[0008] Furthermore, the precast shear wall includes a concrete main body located in the middle, reserved reinforcing bars, and steel sections. The steel sections are staggered in the concrete main body and their ends extend out of the concrete main body. Multiple reserved reinforcing bars are staggered in the vertical or horizontal direction, and both ends of the reserved reinforcing bars extend out of the concrete main body.

[0009] Furthermore, during the installation of the precast shear wall, the precast shear wall is placed between the main beam and the steel-concrete composite column. The ends of the steel sections are connected to the steel-concrete composite column or the main beam by bolting and welding. The ends of the reserved reinforcing bars are also connected to the steel-concrete composite column or the main beam by bolting and welding. After the connection is completed, grouting is performed on the gap between the precast shear wall and the steel-concrete composite column and the main beam.

[0010] Furthermore, the prefabricated shear wall includes a prefabricated shear wall 1 connected to a first-floor raft slab and a prefabricated shear wall 2 not connected to a first-floor raft slab. When installing the prefabricated shear wall, a reserved pit is provided on the first-floor raft slab. The reserved reinforcing bars extending from the bottom of the prefabricated shear wall 1 are located in the reserved pit. Concrete is poured into the reserved pit to achieve a rigid connection between the prefabricated shear wall 1 and the first-floor raft slab.

[0011] Furthermore, the reserved reinforcing bars of the second precast shear wall extend from the top, bottom, left and right sides of the concrete body and are connected to threaded sleeves; the reserved reinforcing bars of the first precast shear wall extend from the top, left and right sides of the concrete body and are connected to threaded sleeves, and the threaded sleeves are used for welding connection with the steel pipe concrete column or the main beam.

[0012] Furthermore, the steel-concrete composite column is provided with multiple layers of steel beams, and Cheeseboard and Deckboard are respectively laid on adjacent layers of steel beams.

[0013] Furthermore, within the same structural unit, when N is greater than 2, the last-level secondary beam is arranged in a straight line within the square area enclosed by the previous-level secondary beam.

[0014] Beneficial effects: 1. The special steel beam arrangement and the load-bearing system composed of floor slabs can realize the bidirectional transfer of floor loads in the steel structure, and improve the vertical stiffness and anti-micro-vibration performance of the structure under the premise of limited vertical clearance of the building; the shear walls and steel-concrete composite columns form a horizontal lateral resisting system, which can improve the horizontal stiffness and anti-micro-vibration performance of the structure.

[0015] 2. The shear walls are prefabricated and then installed, which meets the requirements of assembly, effectively saves construction time, and improves construction efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is the first arrangement of steel beams;

[0018] Figure 3 This is the second arrangement of steel beams;

[0019] Figure 4 This is the third arrangement of steel beams;

[0020] Figure 5 This is a structural schematic diagram of a precast shear wall.

[0021] Figure 6 This is a structural schematic diagram of the precast shear wall after installation.

[0022] Figure 7 This is a schematic diagram of a precast shear wall structure.

[0023] Figure 8 This is a schematic diagram of the precast shear wall structure after installation. Detailed Implementation

[0024] like Figure 1 , Figure 2 The above describes a prefabricated high-rigidity anti-micro-vibration steel beam shear wall structure system, which includes floor slabs, steel beams 1, steel-concrete composite columns 2, and shear walls 3. Figure 2-4The thickened part is the shear wall 3). The steel-concrete composite column 3 is formed by injecting high-grade grout into the steel-concrete composite column 2. Multiple layers of steel beams 1 are provided on the steel-concrete composite column 2. Cheese board 4 and Deck board 5 are laid on the adjacent two layers of steel beams 1 respectively as floor slabs. Shear studs are set between the steel beams and the floor slabs to enhance the connection strength between the floor slabs and the steel beams. The area with Cheese board 4 is the core area, and the area with Deck board 5 is the lower mezzanine support area. One core area and one support area together form a production unit.

[0025] The steel-concrete composite columns 2 are arranged in a matrix. Horizontally arranged steel beams connect the vertically positioned steel-concrete composite columns 2 and shear walls 3. Floor slabs cover the steel beams. The steel beams include main beams 6, primary secondary beams 7, secondary secondary beams 8, and tertiary secondary beams 9. Adjacent steel-concrete composite columns 2 are connected by rigid joints with main beams 6. Two main beams 6 located in the transverse and longitudinal directions, connected to the same steel-concrete composite column 2, and two opposing main beams 6 enclose a structural unit (e.g., ...). Figure 2 As shown in the diagram (square shape), within a structural unit, the midpoints of adjacent main beams 6 are connected to primary secondary beams 7 via hinged joints. Four primary secondary beams 7 enclose another square unit. Within this unit, the midpoints of adjacent primary secondary beams 7 are connected to secondary secondary beams 8 via hinged joints. Four secondary secondary beams 8 enclose another square unit. At least the primary and secondary beams are arranged symmetrically in a square, enabling bidirectional force transmission. When there are more than two secondary beams, such as tertiary secondary beams, within the square unit formed by these secondary beams, the midpoints of the secondary secondary beams 8 are connected to tertiary secondary beams 9 via hinged joints. The tertiary secondary beams 9 can be... Figure 2 The square shown can also be Figure 3 The one-line shape shown can also be Figure 4 The shape shown is 1.

[0026] This arrangement of steel beams, with cheese slabs or deck slabs cast on top, forms vertical load-bearing components, enabling bidirectional transfer of floor loads, similar to the principle of a waffle slab. However, in a waffle slab arrangement in a steel structure, the secondary beams in the X and Y directions are arranged in a crisscross pattern. The connection between the secondary beams and the main beams is such that each secondary beam has a rigid connection node with a main beam in only one direction (e.g., the secondary beam in the X direction only intersects with the main beam in the Y direction, and the secondary beam in the Y direction only intersects with the main beam in the X direction). This indicates that the secondary beam in the X direction bears the load... The force will be transmitted to the main beam in the Y direction, and the force borne by the secondary beam in the Y direction will be transmitted to the main beam in the X direction. The secondary beams in the X and Y directions belong to the same level of secondary beams. If the broken section of a secondary beam is not reinforced, the broken secondary beam will become a second-level secondary beam, and the unbroken secondary beam will become a first-level secondary beam. The force will be transmitted from the second-level secondary beam to the first-level secondary beam, and from the first-level secondary beam to the main beam. This will result in the main beam in one direction experiencing greater stress and the main beam in the other direction experiencing less stress, thus the force transmission will not be completely bidirectional. In this patent, the secondary beams of the same level have no intersection relationship, so no reinforcement is needed. The first-level secondary beams have intersection points with the main beams in both directions. The force is transmitted from the lower-level secondary beam to the higher-level secondary beam, then to the first-level secondary beam, and finally to the main beams in both directions, achieving completely bidirectional force transmission. This overcomes the defect of steel structure grid beams that require reinforcement and can maximize the vertical stiffness and anti-micro-vibration performance of the structure under the premise of limited vertical clearance.

[0027] After the steel beam is installed onto the concrete-filled steel tubular column 2, the precast shear wall 3 is connected between the concrete-filled steel tubular column 2 and the main beam 6 via rigid joints. Specifically, in conjunction with... Figure 5 , Figure 7 The precast shear wall includes a central concrete main body 10, reserved reinforcing bars 11, structural steel 12, and embedded steel strips 13. The structural steel 12 is staggered within the concrete main body 10, with its ends extending beyond the concrete main body 10. Multiple reserved reinforcing bars 11 are staggered vertically or horizontally, with both ends of the reserved reinforcing bars 11 extending beyond the concrete main body 10 and connected to threaded sleeves 14. The precast shear wall is transported as a whole to the construction site for assembly after processing. Figure 6 , Figure 8As shown, when installing the precast shear wall, it is placed between the main beam 6 and the steel-concrete composite column 2. The end of the steel section 12 is connected to the connection node 15 of the steel-concrete composite column or main beam by bolting and welding. The threaded sleeve 14 of the reserved steel bar 11 is connected to the steel-concrete composite column or main beam by bolting and welding. After the connection is completed, the formwork is erected and high-pressure grouting is performed on the gap 16 between the precast shear wall and the steel-concrete composite column / main beam. High-grade grout is injected into the gap between the steel-concrete composite shear wall and the steel column through the reserved grouting holes on the formwork. After curing, the formwork can be removed. The steel-concrete composite shear wall and the main structure are connected by rigid joints to form a horizontal lateral resisting system, which improves the horizontal stiffness and anti-micro-vibration performance of the steel structure workshop.

[0028] Regarding the connection between the shear wall and the first-floor raft slab, combined with Figure 6 The precast shear wall includes a precast shear wall 1 connected to the first-floor raft slab and a precast shear wall 2 not connected to the first-floor raft slab. When installing the precast shear wall, a reserved pit 17 is provided on the first-floor raft slab. The reserved steel bar 11 extending from the bottom of the precast shear wall 1 is located in the reserved pit 17. Concrete is poured into the reserved pit 17 to achieve a rigid connection between the precast shear wall 1 and the first-floor raft slab.

[0029] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A prefabricated high-rigidity anti-micro-vibration steel beam shear wall structure system, comprising floor slabs, steel beams, steel-concrete composite columns, and shear walls, wherein the steel-concrete composite columns are arranged in a matrix, and the vertically arranged steel-concrete composite columns and the shear walls are connected by horizontally arranged steel beams, and the floor slabs are covering the steel beams, characterized in that: The steel beams include main beams, first-level secondary beams...N-level secondary beams, where N is greater than or equal to 2. Adjacent steel-concrete composite columns are connected by main beams through rigid joints. Two main beams located in the transverse and longitudinal directions connected to the same steel-concrete composite column and two main beams opposite to them enclose a square structural unit. Within the square structural unit, the midpoints of adjacent main beams are connected to the first-level secondary beams through hinged joints to form a square structure. The midpoints of adjacent first-level secondary beams are connected to subsequent-level secondary beams through hinged joints to form a square structure. After the steel beams are installed onto the steel-concrete composite columns, prefabricated shear walls are connected between the steel-concrete composite columns and the main beams through rigid joints. Within the same structural unit, when N is greater than 2, the last-level secondary beam is arranged in a straight line within the square area enclosed by the previous-level secondary beam; The precast shear wall includes a central concrete core, reserved reinforcing bars, and structural steel sections. The structural steel sections are staggered within the concrete core and their ends extend out of the concrete core. Multiple reserved reinforcing bars are staggered along the vertical or horizontal direction, with both ends of the reserved reinforcing bars extending out of the concrete core. When installing the precast shear wall, the precast shear wall is placed between the main beam and the steel-concrete composite column. The ends of the steel sections are connected to the steel-concrete composite column or the main beam by bolting and welding. The ends of the reserved reinforcing bars are also connected to the steel-concrete composite column or the main beam by bolting and welding. After the connection is completed, the gap between the precast shear wall and the steel-concrete composite column and the main beam is grouted. The steel-concrete composite column is provided with multiple layers of steel beams, and Cheeseboard and Deckboard are laid on adjacent layers of steel beams respectively.

2. The prefabricated high-rigidity anti-micro-vibration steel beam shear wall structure system according to claim 1, characterized in that: The precast shear wall includes a first precast shear wall connected to a first-floor raft slab and a second precast shear wall not connected to the first-floor raft slab. When installing the precast shear wall, a reserved pit is provided on the first-floor raft slab. The reserved reinforcing bars extending from the bottom of the first precast shear wall are located in the reserved pit. Concrete is poured into the reserved pit to achieve a rigid connection between the first precast shear wall and the first-floor raft slab.

3. The prefabricated high-rigidity anti-micro-vibration steel beam shear wall structure system according to claim 2, characterized in that: The reserved reinforcing bars of the second precast shear wall extend from the top, bottom, left and right sides of the concrete body and are connected to threaded sleeves; the reserved reinforcing bars of the first precast shear wall extend from the top, left and right sides of the concrete body and are connected to threaded sleeves, and the threaded sleeves are used for welding connection with the steel pipe concrete column or the main beam.

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