Building module unit and building system based on primary and secondary structure stress separation

Abstract

The application discloses a kind of building module unit and building system based on primary and secondary structure stress separation, it is related to prefabricated building technical field.The unit includes outer main frame, prefabricated floor, inner functional unit and stress separation connecting component.Outer main frame is formed by rigid connection of load-bearing column and load-bearing beam to form a primary stress system;Prefabricated floor is laid on load-bearing beam;Inner functional unit is assembled by a plurality of prefabricated concrete units, and is arranged on prefabricated floor, and its gravity load is directly transmitted to prefabricated floor.Stress separation connecting component is used to anchor inner functional unit in outer main frame.The application realizes physical separation of outer skeleton load bearing and inner unit function by primary and secondary structure decoupling, significantly reduces on-site wet work, solves the problems of concrete module transportation difficulty and poor universality, and improves assembly efficiency.

Description

[Technical Field] This invention relates to the field of prefabricated building technology, and in particular to a building module unit and building system based on the separation of primary and secondary structural forces. [Background Technology] With the popularization of industrialized construction and green building concepts, modular buildings have been widely promoted as an efficient and low-carbon construction method. However, traditional modular buildings generally adopt the design concept of "module-structure integration," meaning that prefabricated modules not only serve as functional spaces but also bear the vertical and horizontal loads of the main structure. This design mode has the following technical problems in practical applications: Firstly, the on-site construction involves a significant amount of wet work, limiting efficiency. Existing integrated structures often require rebar tying, formwork erection, and concrete pouring at nodes after module assembly. This results in a large amount of wet work remaining on-site, making construction procedures complex and hindering the rapid dry assembly of the main structure, severely restricting the shortening of the construction cycle.

[0003] Secondly, the structural stress coupling results in poor modular versatility. Because the modules need to be adapted to the specific stress requirements of the project, such as stress decomposition based on the shear wall layout, the standardization of module size, reinforcement and connection methods is low, making it difficult to reuse across projects and increasing design and production costs. [Summary of the Invention] The purpose of this invention is to provide a building module unit and building system based on the separation of primary and secondary structural forces, aiming to solve the technical problems of excessive on-site wet work, low construction efficiency and poor module versatility caused by the "module-structure integration" design in existing modular buildings.

[0005] This invention is achieved through the following technical solutions: A building module unit based on the separation of primary and secondary structural forces includes: The outer main frame includes four load-bearing columns, and any two adjacent load-bearing columns are rigidly connected by a first load-bearing beam at the bottom and a second load-bearing beam at the top. The precast floor slab is laid horizontally on the first load-bearing beam and the second load-bearing beam, and the edge of the precast floor slab is provided with an edge sealing beam that can be connected to the first load-bearing beam or the second load-bearing beam. The internal functional unit is located on the precast floor above the first load-bearing beam. The internal functional unit includes multiple vertically stacked precast concrete units, and each vertical precast concrete unit includes multiple horizontally spliced ​​and fixed precast concrete units. A force-separating connection component is disposed between the inner functional unit and the outer main frame, and is used to constrain and anchor the inner functional unit within the outer main frame; The gravity load of the internal functional unit is directly transferred to the precast floor slab via its bottom surface, and then transferred to the first load-bearing beam by the precast floor slab.

[0006] As described above, in the building module unit based on the separation of primary and secondary structural forces, the precast floor slab and the outer main frame are provided with side anchoring components, the side anchoring components including: An embedded steel plate is provided on the side of the edge sealing beam of the precast floor slab. The embedded steel plate includes an anchoring part that is partially embedded in the edge sealing beam and a connecting extension that protrudes downward from the bottom surface of the edge sealing beam. Connection holes are formed on both side walls of the first load-bearing beam and / or the second load-bearing beam; The first fastening bolt passes through the embedded steel plate and the side wall of the first load-bearing beam and / or the second load-bearing beam, and anchors the side of the edge sealing beam to the side wall of the first load-bearing beam and / or the second load-bearing beam.

[0007] As described above, the building module unit based on the separation of primary and secondary structural forces includes a transverse constraint connection plate disposed on the top of each vertical precast concrete unit. The two ends of the transverse constraint connection plate are respectively fixedly connected to two load-bearing columns adjacent to the outer main frame. Multiple splicing locking nodes are provided at intervals along the length direction on the transverse constraint connection plate. The splicing locking nodes are correspondingly positioned at the joint between adjacent horizontal precast concrete units, connecting multiple horizontal precast concrete units into a whole.

[0008] As described above, in the building module unit based on the separation of primary and secondary structural forces, the splicing and locking nodes include: The first embedded threaded sleeve is set at the top joint edge of the adjacent horizontal precast concrete unit. The first embedded threaded sleeve is connected to a corresponding second fastening bolt. The second fastening bolt passes through the transverse constraint connecting plate to lock the adjacent horizontal precast concrete unit. A clearance groove is provided at the bottom joint edge of the horizontal precast concrete unit; When multiple vertical precast concrete units are stacked vertically, the clearance groove at the bottom of the upper horizontal precast concrete unit snaps onto the transverse constraint connecting plate and the second fastening bolt at the top of the lower horizontal precast concrete unit, forming an embedded clearance fit between the upper and lower layers.

[0009] As described above, in the building module unit based on the separation of primary and secondary structural forces, a grouting layer is also provided between the layers of the vertical precast concrete unit. The grouting layer is located between the top surface of the lower horizontal precast concrete unit and the bottom surface of the upper horizontal precast concrete unit.

[0010] As described above, in the building module unit based on the separation of primary and secondary structural forces, the grout layer simultaneously fills the gap between the clearance groove and the transverse constraint connecting plate, which is used to transfer vertical loads and achieve interlayer leveling and sealing.

[0011] As described above, in the building module unit based on the separation of primary and secondary structural forces, each corner of the vertical precast concrete unit is recessed with a recessed corner avoidance part that matches the inner corner profile of the load-bearing column.

[0012] As described above, in the building module unit based on the separation of primary and secondary structural forces, the load-bearing column is a steel-concrete composite column, and both the first load-bearing beam and the second load-bearing beam are steel beams; The bottom of the precast floor slab is provided with multiple variable cross-section beams arranged in a crisscross pattern.

[0013] The building system is composed of multiple building module units, as described above, based on the separation of primary and secondary structural forces, which are assembled in three-dimensional space according to a preset building module. In the horizontal array direction, two adjacent building module units share a load-bearing column, a first load-bearing beam, and a second load-bearing beam located at the junction; the shared load-bearing column, the first load-bearing beam, and the second load-bearing beam also serve as the outer main frame components of the building module units on the left and right sides, forming a continuous horizontal load-bearing skeleton. A horizontal common connection node is provided between the precast floor slabs on both sides of the shared first load-bearing beam and / or second load-bearing beam. The horizontal common connection node includes the side anchoring component and the top tie component. In the vertical direction, multiple building module units are stacked upwards in sequence, and the load-bearing column axes of adjacent building module units are aligned and fixedly connected to form a continuous vertical main load-bearing frame; vertical load transfer contact surfaces are formed between adjacent load-bearing beams.

[0014] In the building system described above, the top ties component includes: A top connecting steel plate is set above the common first load-bearing beam and / or second load-bearing beam, and laterally crosses above the common first load-bearing beam and / or second load-bearing beam, with its two ends extending to the top of the sealing beams of the precast floor slabs on the left and right sides respectively. The second pre-embedded threaded sleeve is located on one side of the top of the sealing beam; The third fastening bolt passes through the top connecting steel plate and is screwed into the second pre-embedded bolt sleeve, connecting the precast floor slabs on the left and right sides with the common first load-bearing beam and / or second load-bearing beam as a whole; Vertical gaps are formed between the corresponding edge beams of the precast floor slabs on the left and right sides, and between the shared first load-bearing beam and / or second load-bearing beam. The vertical gaps are filled with a filling material, and the top connecting steel plate covers the filling material.

[0015] Compared with the prior art, the present invention has the following advantages: 1. This invention breaks through the strong coupling design of traditional "module-structure integration," clearly defining the outer main frame as the primary load-bearing system, bearing the main horizontal and vertical loads, while the internal functional units, as the secondary structural system, only bear their own weight. This design frees the internal functional units from the lateral force requirements of different projects, thereby enabling standardized factory prefabrication and cross-project reuse, significantly reducing design and production costs.

[0016] 2. The connection method of this invention mainly adopts dry assembly. The outer main frame is quickly formed through rigid connection, the precast floor slab is connected to the load-bearing beam through edge sealing beams, and the internal functional units are directly placed on the floor slab and anchored through stress separation connection components. This process eliminates the complicated procedures required by traditional concrete modules, such as on-site rebar binding, vertical grouting of shear walls, and in-situ casting of composite layers, truly realizing the efficient and rapid construction of prefabricated buildings.

[0017] 3. The challenges of transporting and hoisting large concrete box caissons have been solved. The internal functional units are composed of multiple vertically stacked precast concrete units, which are further subdivided into horizontal precast concrete units. This modular assembly structure not only avoids the limitations of transporting ultra-large and ultra-heavy concrete box caissons and reduces reliance on on-site ultra-large tonnage lifting equipment, but also facilitates the adjustment of installation errors through stress-separated connection components, thereby improving the construction error tolerance rate. [Attached Image Description] To more clearly illustrate the technical solutions in the embodiments of the invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional schematic diagram of Example 1; Figure 2 This is a three-dimensional schematic diagram of the outer main frame in Example 1; Figure 3 This is a three-dimensional schematic diagram of the internal functional unit in Embodiment 1; Figure 4 This is a three-dimensional schematic diagram of the precast floor slab in Example 1. Figure 1 ; Figure 5 This is a three-dimensional schematic diagram of the precast floor slab in Example 1. Figure 2 ; Figure 6 This is a schematic diagram of a possible floor plan of the building system in Example 2; Figure 7 for Figure 6 Detailed cross-sectional view along line AA in the middle section; Figure 8 For the corresponding Figure 6 A schematic diagram of the plan layout of multiple horizontal precast concrete units; Figure 9 for Figure 8 A detailed schematic diagram of the splicing and locking node construction method at point B.

Detailed Implementation Methods

[0021] Example 1 This embodiment proposes a building module unit based on the separation of primary and secondary structural forces. The design concept of this module unit is to physically decouple the structural force system of the building from the functional space, thereby achieving clarity of structural forces and flexibility of functional layout.

[0022] Please see Figures 1 to 9 As the core skeleton of the building module unit in this embodiment, the building module unit is provided with an outer main frame 1. The outer main frame 1 constitutes the primary load-bearing system of the entire unit, and its main structure is defined by four vertically arranged load-bearing columns 11, which define the spatial outline of the unit. Between the load-bearing columns 11, transverse load-bearing components are fixed by rigid connections, specifically including a first load-bearing beam 12 located at the bottom of the frame and a second load-bearing beam 13 located at the top of the frame. The rigid connection can be achieved by welding or high-strength bolt end plate connection, so that any two adjacent load-bearing columns 11, the first load-bearing beam 12, and the second load-bearing beam 13 together form a load-bearing system with high lateral stiffness and load-bearing capacity, thereby independently bearing horizontal loads (such as wind loads and seismic forces) and vertical loads from the outside. In this field, the load-bearing columns 11 and load-bearing beams can be selected from H-beams, box-sections, or square steel tubes to obtain excellent mechanical properties.

[0023] A precast floor slab 2 is laid on the transverse members of the aforementioned outer main frame 1. Specifically, the precast floor slab 2 is laid horizontally on the first load-bearing beam 12 and the second load-bearing beam 13, forming the bottom slab structure and top slab structure of this module unit, respectively. In order to achieve effective force transmission between the precast floor slab 2 and the outer main frame 1, an edge sealing beam 21 is specially provided on the edge of the precast floor slab 2. This edge sealing beam 21 serves as a reinforcing member around the floor slab and is constructed to be connected to the first load-bearing beam 12 or the second load-bearing beam 13, for example, by means of bolt connection, welding, or pressure plate fixing, so as to stably position the precast floor slab 2 on the transverse beams of the outer main frame 1.

[0024] In this embodiment, the internal functional unit 3 is the main body that realizes the living or use function. As an independent secondary structural system, it is located on the precast floor slab 2 above the first load-bearing beam 12. This means that the internal functional unit 3 is not directly suspended or relies on the load-bearing column 11 for vertical support. Instead, it transfers its gravity load directly to the precast floor slab 2 at the bottom through its bottom surface, and then it is evenly transferred by the precast floor slab 2 to the first load-bearing beam 12 below, and finally transferred to the foundation by the load-bearing column 11.

[0025] In terms of structural composition, the internal functional unit 3 is not cast in one piece, but adopts a modular assembly structure, which includes multiple vertically stacked precast concrete units 31. For ease of transportation and manufacturing, each vertical precast concrete unit 31 is further composed of multiple horizontally spliced ​​and fixed precast concrete units 311. This precast concrete structure gives the internal functional unit 3 excellent sound insulation, fire resistance, and living comfort, while the modular division method solves the problem of difficult transportation of large concrete components.

[0026] Please see Figure 9 To ensure the stability of the inner functional unit 3 within the outer main frame 1 and prevent overturning or excessive relative displacement during construction or later use, a force-separating connection component 4 is installed between the inner functional unit 3 and the outer main frame 1. The function of this force-separating connection component 4 is to "constrain" and "anchor," that is, to limit the horizontal swaying of the inner functional unit 3 relative to the outer main frame 1, locking the inner functional unit 3 within the range of the outer main frame 1. It should be noted that the so-called "force separation" means that this component primarily transmits horizontal constraint forces, rather than serving as the main transmission path for the gravity load of the inner functional unit 3. This ensures the decoupling of the outer main frame 1 (i.e., the main structure) and the inner functional unit 3 (i.e., the secondary structure) in terms of vertical force, avoiding force interference between components of different stiffness.

[0027] Furthermore, as a preferred embodiment rather than a limitation, in order to achieve lightweight and ease of construction while ensuring high structural load-bearing capacity, this embodiment specifies the material and configuration of the main frame.

[0028] Regarding the material selection for the outer main frame 1, the load-bearing columns 11 are preferably made of steel-concrete composite tubular columns. Specifically, the load-bearing columns 11 consist of an outer thin-walled steel tube and an inner core concrete working together. The outer steel tube provides circumferential restraint to the core concrete, significantly improving the compressive strength and ductility of the concrete; at the same time, the presence of the core concrete effectively delays the local buckling of the steel tube. This combined structure is particularly suitable for corner columns in modular buildings, capable of bearing huge vertical loads with a relatively small cross-sectional size. The first load-bearing beam 12 and the second load-bearing beam 13 are both made of steel beams, such as hot-rolled H-beams, welded I-beams, and box girders. Steel beams have the characteristics of high strength, light weight, and ease of processing and connection, and can be easily rigidly connected to the steel-concrete composite tubular columns by welding or bolting, establishing a high-rigidity skeleton foundation for the entire modular unit.

[0029] Furthermore, as a preferred embodiment and not a limitation, the precast floor slab 2 does not employ a traditional uniform-thickness flat plate structure. Instead, it features multiple variable-section beams 22 arranged in a crisscross pattern at its bottom. These variable-section beams 22 are distributed in a rib-like manner, with their cross-sectional height gradually changing from the mid-span to the supports or according to stress requirements, such as a fish-belly or trapezoidal gradient. This design has the following technical advantages: on the one hand, by increasing the cross-sectional height in areas of high stress, the flexural stiffness and load-bearing capacity of the floor slab are effectively improved; on the other hand, by thinning the cross-section in areas of low stress, the volume of ineffective concrete is significantly reduced, thereby significantly reducing the self-weight of the precast floor slab 2. This lightweight design is crucial for prefabricated modular units because it directly reduces the requirements for hoisting equipment and transportation costs, while also alleviating the static load burden transferred to the external main frame 1.

[0030] Furthermore, as a preferred embodiment and not a limitation, the building module unit in this embodiment is provided with a side anchoring component 5 at the junction of the precast floor slab 2 and the outer main frame 1. The main function of this component is to provide a reliable horizontal force transmission path, ensuring that the precast floor slab 2 can work together with the outer main frame 1 under earthquake or wind loads, and to avoid relative slippage.

[0031] Specifically, the side anchoring component 5 includes a pre-embedded steel plate 51 disposed on the side of the edge sealing beam 21 of the precast floor slab 2. During the manufacturing of the edge sealing beam 21, the pre-embedded steel plate 51 is integrally pre-installed on its side. Structurally, the pre-embedded steel plate 51 comprises two functional areas: one is an anchoring part embedded in the concrete matrix of the edge sealing beam 21, which may be welded with anchor claws or studs to ensure sufficient bond strength and pull-out resistance between the steel plate and the concrete; the other is a connecting extension protruding downwards from the bottom surface of the edge sealing beam 21, which forms an exposed connecting lug, providing operational space for subsequent mechanical connections.

[0032] Correspondingly, connection holes matching the positions of the aforementioned connection extensions are pre-drilled on both side walls of the first load-bearing beam 12 and / or the second load-bearing beam 13. During the on-site assembly stage, after the precast floor slab 2 is placed on the load-bearing beam, the connection extension of the embedded steel plate 51 will naturally fit against the outer side wall of the load-bearing beam. At this time, by using a high-strength first fastening bolt 52 to pass laterally through the connection extension of the embedded steel plate 51 and the connection hole on the side wall of the first load-bearing beam 12 or the second load-bearing beam 13, and by applying a pre-tightening force, the side of the edge sealing beam 21 is tightly anchored to the side wall of the load-bearing beam.

[0033] The technical advantage of this connection design lies in the fact that it not only utilizes the shear and tensile properties of bolts to achieve a physical connection between components, but also the downward protruding structure of the embedded steel plate 51 effectively creates a shear keyway effect between the precast floor slab 2 and the steel beam, greatly enhancing the node's ability to resist horizontal shear deformation. Furthermore, compared to on-site welding, bolted connections avoid thermal damage to the steel beam base material, simplify construction procedures, and improve assembly efficiency.

[0034] Furthermore, as a preferred embodiment and not a limitation, the force-separating connection assembly 4 includes a transverse restraint connection plate 41 disposed on top of each vertical precast concrete unit 31. This transverse restraint connection plate 41 is typically made of flat steel, angle steel, or channel steel with a certain thickness and rigidity, and it spans horizontally and covers the top of the entire row of horizontal precast concrete units 311. In terms of connection, both ends of the transverse restraint connection plate 41 are fixedly connected to two adjacent load-bearing columns 11 in the outer main frame 1. This connection can be achieved by pre-welding brackets or connection plates to the inside of the load-bearing columns 11, and then using high-strength bolts or on-site welding. Thus, the transverse restraint connection plate 41 effectively acts as a ring beam or horizontal tie rod, connecting the load-bearing columns 11 to the inner functional units 3 on a horizontal level, providing necessary out-of-plane restraint to the inner functional units 3, and preventing them from collapsing under lateral forces.

[0035] To achieve the integration of the entire row of horizontal precast concrete units 311, multiple splicing locking nodes 42 are spaced apart along the length of the transverse restraint connecting plate 41. These splicing locking nodes 42 are not randomly arranged, but are positioned at the joints between adjacent horizontal precast concrete units 311. Through this structure, the transverse restraint connecting plate 41, using the splicing locking nodes 42, spans the joints, firmly connecting multiple adjacent horizontal precast concrete units 311 into a unified whole.

[0036] The setting of the transverse constraint connection plate 41 solves two problems: first, the horizontal constraint between the inner functional unit 3 and the outer main frame 1 is realized through the end connection; second, the integrated assembly between multiple horizontal precast concrete units 311 in the same row is realized through the multiple splicing locking nodes 42 in the middle.

[0037] Furthermore, as a preferred embodiment and not a limitation, the splicing locking node 42 is mainly composed of two parts: a connecting fastening component and an avoidance fitting structure. Regarding the connecting fastening, a first pre-embedded threaded sleeve 421 is pre-embedded at the top splice edge of adjacent horizontal precast concrete units 311. This first pre-embedded threaded sleeve 421 is anchored within the concrete wall, with its internal thread opening upwards. During assembly, a second fastening bolt 422 passes through a pre-drilled hole on the transverse constraint connecting plate 41 from top to bottom and is screwed into the corresponding first pre-embedded threaded sleeve 421. By tightening the second fastening bolt 422, the transverse constraint connecting plate 41 presses together the two adjacent horizontal precast concrete units 311, connecting them into a single unit.

[0038] However, such top-protruding bolted connections often hinder the installation of the upper-level vertical precast concrete unit (31). To address this issue, this embodiment provides a clearance groove 423 at the bottom joint edge of each horizontal precast concrete unit 311. The clearance groove 423 is an upwardly recessed notch space, slightly larger than the outline of the lower node protrusion.

[0039] When multiple vertical precast concrete units 31 are stacked vertically, the clearance groove 423 at the bottom of the upper horizontal precast concrete unit 311 can precisely engage and cover the transverse constraint connecting plate 41 and the second fastening bolt 422 at the top of the lower horizontal precast concrete unit 311. This structure forms an embedded clearance fit between the upper and lower layers.

[0040] Furthermore, as a preferred embodiment rather than a limitation, in order to compensate for the unavoidable dimensional deviations of precast components during production and installation, and to ensure the uniformity and continuity of vertical gravity load transmission between layers, this embodiment introduces a wet-work process in the interlayer connection structure of the vertical precast concrete unit 31.

[0041] Specifically, a grouting layer (not shown in the figure) is also provided between the layers of the vertical precast concrete unit 31. This grouting layer is laid between the top surface of the lower horizontal precast concrete unit 311 and the bottom surface of the upper horizontal precast concrete unit 311, forming a continuous or discontinuous horizontal bonding layer.

[0042] The grouting layer can be made of high-strength, non-shrink grout or polymer cement mortar, which has good fluidity, early strength, and micro-expansion characteristics. During construction, workers first lay a 10mm-20mm thick layer of grout on the top surface of the lower unit, and then hoist the upper unit onto it. Through the plastic deformation and hardening filling of the grouting layer, unevenness at the contact surface between the upper and lower concrete components can be effectively eliminated, thus avoiding stress concentration damage caused by point contact. At the same time, the dense body formed after the grouting layer hardens also acts as an interlayer seal, blocking the channels for wind and rain penetration and improving the physical properties of the building module unit.

[0043] Furthermore, as a preferred embodiment rather than a limitation, in order to eliminate the cavity formed inside the node when the top locking structure and the bottom clearance structure are engaged, and to ensure the continuity of vertical force in the node area and the durability of the metal components, the distribution range of the grout layer 6 is not limited to the planar contact area between the upper and lower horizontal precast concrete units 311. It also extends and fills the irregular gaps between the clearance groove 423 and the transverse constraint connecting plate 41 and its matching fasteners. During the construction and assembly process, the fluid grout, under its own weight and the squeezing action of the upper unit, and with the assistance of manual labor, will fill the remaining space inside the clearance groove 423, thereby tightly wrapping the transverse constraint connecting plate 41 and the second fastening bolt 422 in the hardened grout.

[0044] This fully infilled structure transforms any air gaps that might exist within the nodes into a solid, load-bearing medium. This allows vertical loads to be effectively transferred via the grout layer 6 between the bottom of the clearance groove 423 and the surface of the transverse constraint connecting plate 41, avoiding stress concentration caused by localized suspension. Simultaneously, the dense grout layer surrounding the metal connectors blocks the contact path of external moisture and oxygen, providing reliable corrosion protection for the internal steel plates and bolts. Furthermore, utilizing the adaptive filling characteristics of the grout, this structure effectively compensates for manufacturing and construction tolerances between steel plate thickness, bolt height, and groove depth, achieving high-precision leveling and sealing of interlayer nodes and ensuring the overall physical performance and mechanical stability of the structure.

[0045] Furthermore, as a preferred embodiment and not a limitation, in order to optimize the internal space utilization and external facade aesthetics of the building module unit, and to enhance the form fit between the internal functional units and the external main frame, recessed corner avoidance portions 312 are respectively provided at the four corner ends of the vertical precast concrete unit 31. The geometry of the corner avoidance portion 312 is designed to match the cross-sectional form of the load-bearing column 11, so that its outline matches the outline of the inner corner end of the load-bearing column 11. For example, when the load-bearing column 11 is a square cross-section steel-concrete composite column, the corner avoidance portion 312 is designed as a right-angled L-shaped notch; when the load-bearing column 11 is a circular cross-section, the corner avoidance portion 312 is designed as a concave arc-shaped notch.

[0046] During assembly, when the vertical precast concrete unit 31 is placed on the precast floor slab 2 and installed in place, the corner ends of the load-bearing column 11 are partially or completely accommodated within the corresponding internal corner relief portion 312. This structure cleverly conceals or embeds the structural columns that originally protruded from the wall into the corner space of the wall, achieving a deep integration of structure and building function. From the outside, the outer edge of the vertical precast concrete unit 31 and the outer edge of the load-bearing column 11 form a corner fit or flush fit, which not only eliminates the protruding column corners inside, facilitating furniture placement and interior decoration, but also makes the building facade smoother and simpler. In addition, this fitted relationship also plays a role in auxiliary positioning to a certain extent, limiting the torsional displacement of the internal functional unit 3 in the horizontal direction, further enhancing the stability of the overall structure.

[0047] Example 2 Please see Figures 6 to 9 Based on the building module unit described in Embodiment 1 above, this embodiment further proposes a building system that constructs multi-story or high-rise building entities that meet different scale and functional requirements by assembling multiple building module units in an array in three-dimensional space according to a preset building module.

[0048] Specifically, in the horizontal array direction of the building system, adjacent building module units do not employ the traditional double-wall or double-column parallel structure, but instead share load-bearing components located at the junction. That is, the load-bearing column 11, the first load-bearing beam 12, and the second load-bearing beam 13 located at the junction no longer belong to a single module unit, but simultaneously serve as common components of the main external frame 1 of the left and right building module units. This shared design physically integrates adjacent units into a whole, with the shared load-bearing column 11, the first load-bearing beam 12, and the second load-bearing beam 13 forming a continuous horizontal load-bearing skeleton. This scheme significantly reduces the use of redundant components, lowers steel consumption, and also eliminates the potential waste of building space and facade design challenges associated with parallel double-column layouts.

[0049] To achieve effective connection and load-bearing coordination between the floor slabs on both sides of the shared frame, a horizontal shared connection node is provided between the precast floor slabs 2 located on both sides of the shared first load-bearing beam 12 and / or second load-bearing beam 13. This horizontal shared connection node is a composite connection system, which not only includes the side anchoring components 5 mentioned in Embodiment 1, but also has a top tying component 7 specifically for top tying. In specific implementation, the web sides or flange sides of the shared load-bearing beam are shear-connected to the sealing beams 21 of the two precast floor slabs 2 on the left and right sides through the side anchoring components 5, and at the same time, a cross-connection is made at the top of the beam through the top tying component 7, thereby ensuring the effective transmission of horizontal forces between adjacent units and enhancing the overall rigidity of the floor plan.

[0050] In the vertical direction of the building system, multiple building modules are stacked upwards sequentially. To ensure the continuity and stability of vertical load transfer, the axes of the load-bearing columns 11 of adjacent building modules are strictly controlled to be on the same vertical line and fixed by rigid connections such as high-strength bolts, flanges, or welding, thus forming a vertical main load-bearing skeleton that runs through the entire height of the building. At the same time, vertical load transfer contact surfaces are formed between the first load-bearing beam 12 at the bottom of the upper unit and the second load-bearing beam 13 at the top of the lower unit, or between the bottom beam of the upper unit and the top beam of the lower unit. These contact surfaces, through close contact or the installation of gaskets, damping pads, etc., help to share part of the vertical gravity load and increase the damping and redundancy of the structural system.

[0051] Furthermore, as a preferred embodiment and not a limitation, to ensure the tensile strength of the top connection between two adjacent building module units in the horizontal array and to enhance the overall rigidity of the precast floor plan, the core component of the top tie assembly 7 is the top connecting steel plate 71. Please refer to [reference needed]. Figure 7 The top connecting steel plate 71 is positioned above the shared first load-bearing beam 12 and / or the second load-bearing beam 13. Its dimensions are designed to laterally span the top surface of the shared load-bearing beam, with its left and right ends extending above the sealing beams 21 of the adjacent precast floor slabs 2, forming a spanning connection. To ensure reliable anchoring of the top connecting steel plate 71 to the precast floor slabs 2 on both sides, second pre-embedded threaded sleeves 72 are pre-embedded at the top of the sealing beams 21 of the two precast floor slabs 2 located on the left and right sides of the shared load-bearing beam.

[0052] During installation, two or more third fastening bolts 73 pass through the reserved holes at the left and right ends of the top connecting steel plate 71, and are screwed into the second embedded bolt sleeves 72 in the left and right side sealing beams 21 for tightening.

[0053] Through this bidirectional anchoring connection method, the top connecting steel plate 71 connects the originally independent precast floor slabs 2 on the left and right sides across the first load-bearing beam 12 and / or the second load-bearing beam 13 in the middle into a whole bearing structure, effectively resisting the horizontal load forces between the floor slab and the steel beam, as well as between adjacent floor slabs.

[0054] Furthermore, considering the dimensional tolerances between steel structures and precast concrete components during manufacturing and installation, and to facilitate on-site hoisting and placement, a certain vertical gap 74 is typically reserved or formed between the corresponding sealing beams 21 of the left and right precast floor slabs 2 and the shared first load-bearing beam 12 and / or second load-bearing beam 13. In this embodiment, the vertical gap 74 is filled with a material, preferably high-strength non-shrink grout or fine aggregate concrete. After hardening, this material can transmit horizontal pressure at the node, forming a couple with the horizontal tension transmitted by the top connecting steel plate 71, significantly improving the node's bending and shear resistance. The top connecting steel plate 71 is structurally positioned to cover the filler, acting as a formwork to prevent grout overflow and as a protective cover to prevent the filler material from being eroded or damaged by the external environment, thus ensuring the durability and safety of the node connection.

[0055] Example 3 This embodiment provides a construction method for building module units and building systems based on the separation of primary and secondary structural forces as described in Embodiments 1 and 2 above, specifically including the following steps: Step S1: Factory production and pre-embedded preparation of precast components. At the factory, the load-bearing columns 11 and steel beams (i.e., the first load-bearing beam 12 and the second load-bearing beam 13) required for the outer main frame 1, the precast floor slab 2, and the vertical precast concrete units 31 that constitute the internal functional units 3 are precast independently.

[0056] During the pouring of the edge sealing beam 21 of the precast floor slab 2, the embedded steel plate 51 in the side anchoring component 5 is precisely positioned and pre-embedded to ensure that the connecting extension of the embedded steel plate 51 protrudes accurately downward from the bottom surface of the edge sealing beam 21; at the same time, the second embedded threaded sleeve 72 in the top tie component 7 is pre-embedded at the top of the edge sealing beam 21.

[0057] During the pouring of the vertical precast concrete unit 31 (and the horizontal precast concrete unit 311 that it comprises), a first pre-embedded threaded sleeve 421 is pre-embedded at the edge of the top joint, a clearance groove 423 is pre-reserved at the edge of the bottom joint, and a recessed corner clearance part 312 matching the outline of the load-bearing column 11 is pre-reserved at the corner.

[0058] Step S2: Construction of the shared bottom frame. At the construction site, the load-bearing columns 11 are positioned according to the building design modules and installed. In the horizontal array direction, for two adjacent module units, a shared load-bearing column 11 is installed at the junction. Subsequently, the first load-bearing beam 12 located at the bottom is welded between adjacent load-bearing columns 11. At this time, the outer main frame 1 is in a top-open state, and the upper second load-bearing beam 13 has not yet been installed to facilitate the subsequent hoisting of the inner functional units 3.

[0059] Step S3: Laying and anchoring the precast floor slab. The precast floor slab 2 is laid horizontally on the first load-bearing beam 12 using hoisting equipment. After the floor slab is in place, the construction workers use the first fastening bolt 52 to pass through the connecting extension of the pre-embedded steel plate 51 on the side of the sealing beam 21 and the connecting hole on the side wall of the first load-bearing beam 12, and tighten it to complete the lateral anchoring of the precast floor slab 2 and the outer main frame 1, forming a stable bottom support platform.

[0060] Step S4: First-floor implantation and horizontal locking of the internal functional unit. The first-floor horizontal precast concrete unit 311 of the internal functional unit 3 is hoisted in through the top opening of the outer main frame 1, so that it sits on the precast floor slab 2.

[0061] During the placement process, the position of the horizontal precast concrete unit 311 is adjusted so that the inside corner avoidance part 312 of its corner covers or fits the inner corner end of the load-bearing column 11.

[0062] A transverse constraint connecting plate 41 from the stress separation connecting assembly 4 is installed on the top of the first-floor horizontal precast concrete unit 311, and its two ends are welded to the load-bearing column 11 respectively. Then, the second fastening bolt 422 is screwed through the transverse constraint connecting plate 41 into the first pre-embedded bolt sleeve 421 to lock the adjacent horizontal precast concrete units 311 into a whole.

[0063] Step S5: Vertical stacking and interlayer avoidance of internal functional units. Lay a mortar layer 6 on the top surface of the first-floor horizontal precast concrete unit 311, focusing on filling the gaps around the transverse constraint connecting plate 41 and the second fastening bolt 422.

[0064] The horizontal precast concrete unit 311 of the upper layer is hoisted so that its bottom clearance groove 423 is precisely engaged and covered on the horizontal constraint connecting plate 41 and the protruding second fastening bolt 422 of the lower layer.

[0065] The fluidity of the grout layer 6 is used to fill the gaps in the clearance groove 423, achieving embedded clearance fit and leveling seal between the upper and lower layers. This step is repeated until all layers of the inner functional unit 3 are stacked.

[0066] Step S6: Closing the outer main frame. After the inner functional unit 3 is installed, the upper second load-bearing beam 13 is rigidly connected to the top of the load-bearing column 11 to close the outer main frame 1. Subsequently, the precast floor slab 2 is laid on the second load-bearing beam 13, and the top slab is fixed using the first fastening bolt 52 of the side anchoring assembly 5. At this point, the assembly of the single-story or single-unit building module is completed.

[0067] Step S7: Connecting common nodes of the horizontal array. After assembling adjacent module units in the horizontal direction (sharing load-bearing column 11 and load-bearing beam), carry out the top tie-up construction.

[0068] The top connecting steel plate 71 is placed horizontally above the shared first load-bearing beam 12 and / or second load-bearing beam 13.

[0069] The third fastening bolts 73 are passed through the holes at both ends of the top connecting steel plate 71 and screwed into the second embedded bolt sleeves 72 in the sealing beams 21 of the precast floor slab 2 on the left and right sides, and tightened.

[0070] High-strength grouting material is filled into the vertical gap 74 between the left and right side sealing beams 21 and the common load-bearing beam, and the top connecting steel plate 71 is placed over the filling material to complete the construction of the horizontal common connection node.

[0071] Step S8: Vertical System Expansion. After assembling the bottom-level module units, the upper-level module units are superimposed. The axis of the load-bearing column 11 of the upper-level module unit is aligned with the axis of the load-bearing column 11 of the lower-level module unit. Rigid fixation is achieved through column-to-column connection nodes such as flanges or welding, forming a continuous vertical main load-bearing skeleton and ensuring an effective vertical load transfer contact surface between the upper and lower load-bearing beams (first load-bearing beam 12 and second load-bearing beam 13). Repeat steps S2 to S7 until the construction of the entire building system is completed.

[0072] The above are implementation methods provided in conjunction with specific content, and it is not intended that the specific implementation of this application is limited to these descriptions. Any methods or structures that are similar to those of this application, or any technical deductions or substitutions made based on the concept of this application, should be considered within the scope of protection of this application.

Claims

1. A building module unit based on the separation of primary and secondary structural forces, characterized in that, include: The outer main frame (1) includes four load-bearing columns (11), and any two adjacent load-bearing columns (11) are rigidly connected by a first load-bearing beam (12) at the bottom and a second load-bearing beam (13) at the top. The precast floor slab (2) is laid horizontally on the first load-bearing beam (12) and the second load-bearing beam (13). The edge of the precast floor slab (2) is provided with a sealing beam (21) that can be connected to the first load-bearing beam (12) or the second load-bearing beam (13). The internal functional unit (3) is located on the precast floor slab (2) above the first load-bearing beam (12). The internal functional unit (3) includes multiple vertical precast concrete units (31) stacked vertically. Each vertical precast concrete unit (31) includes multiple horizontal precast concrete units (311) spliced ​​and fixed in the horizontal direction. Force separation connection component (4) is disposed between the inner functional unit (3) and the outer main frame (1) for constraining and anchoring the inner functional unit (3) within the outer main frame (1); The gravity load of the internal functional unit (3) is directly transmitted to the precast floor slab (2) via its bottom surface, and then transmitted to the first load-bearing beam (12) by the precast floor slab (2). The precast floor slab (2) and the outer main frame (1) are provided with side anchoring components (5), the side anchoring components (5) include: An embedded steel plate (51) is provided on the side of the sealing beam (21) of the precast floor slab (2). The embedded steel plate (51) includes an anchoring part that is partially embedded in the sealing beam (21) and a connecting extension that protrudes downward from the bottom surface of the sealing beam (21). Connection holes are provided on both sides of the first load-bearing beam (12) and / or the second load-bearing beam (13); The first fastening bolt (52) passes through the embedded steel plate (51) and the side wall of the first load-bearing beam (12) and / or the second load-bearing beam (13) to anchor the side of the edge sealing beam (21) to the side wall of the first load-bearing beam (12) and / or the second load-bearing beam (13).

2. The building module unit based on the separation of primary and secondary structural forces according to claim 1, characterized in that, The stress separation connection assembly (4) includes a transverse constraint connection plate (41) set on the top of each vertical precast concrete unit (31). The two ends of the transverse constraint connection plate (41) are fixedly connected to two adjacent load-bearing columns (11) of the outer main frame (1). Multiple splicing locking nodes (42) are provided at intervals along the length direction on the transverse constraint connection plate (41). The splicing locking nodes (42) are positioned at the joint between adjacent horizontal precast concrete units (311) to connect multiple horizontal precast concrete units (311) into a whole.

3. The building module unit based on the separation of primary and secondary structural forces according to claim 2, characterized in that, The splicing locking node (42) includes: The first embedded threaded sleeve (421) is set at the top joint edge of the adjacent horizontal precast concrete unit (311). The first embedded threaded sleeve (421) is connected to a corresponding second fastening bolt (422). The second fastening bolt (422) passes through the transverse constraint connecting plate (41) to lock the adjacent horizontal precast concrete unit (311). A clearance groove (423) is provided at the bottom joint edge of the horizontal precast concrete unit (311); When multiple vertical precast concrete units (31) are stacked vertically, the clearance groove (423) at the bottom of the upper horizontal precast concrete unit (311) snaps onto the transverse constraint connecting plate (41) and the second fastening bolt (422) at the top of the lower horizontal precast concrete unit (311), forming an embedded clearance fit between the upper and lower layers.

4. The building module unit based on the separation of primary and secondary structural forces according to claim 3, characterized in that, A grouting layer is also provided between the layers of the vertical precast concrete unit (31), and the grouting layer is provided between the top surface of the lower horizontal precast concrete unit (311) and the bottom surface of the upper horizontal precast concrete unit (311).

5. The building module unit based on the separation of primary and secondary structural forces according to claim 4, characterized in that, The grout layer simultaneously fills the gap between the relief groove (423) and the transverse constraint connecting plate (41) to transfer vertical loads and achieve interlayer leveling and sealing.

6. The building module unit based on the separation of primary and secondary structural forces according to claim 1, characterized in that, Each corner of the vertical precast concrete unit (31) is recessed with a recessed corner avoidance part (312) that matches the inner corner profile of the load-bearing column (11).

7. The building module unit based on the separation of primary and secondary structural forces according to claim 1, characterized in that, The load-bearing column (11) is a steel-concrete composite column, and the first load-bearing beam (12) and the second load-bearing beam (13) are both steel beams; The bottom of the precast floor slab (2) is provided with multiple variable cross-section beams (22) arranged in a crisscross pattern.

8. A building system, characterized in that, It is assembled in three-dimensional space by multiple building module units based on the separation of primary and secondary structural forces as described in any one of claims 1 to 7, according to a preset building module. In the horizontal array direction, two adjacent building module units share a load-bearing column (11), a first load-bearing beam (12), and a second load-bearing beam (13) located at the junction; the shared load-bearing column (11), the first load-bearing beam (12), and the second load-bearing beam (13) also serve as components of the outer main frame (1) of the building module units on the left and right sides, forming a continuous horizontal force-bearing skeleton. A horizontal common connection node is provided between the precast floor slabs (2) on both sides of the common first load-bearing beam (12) and / or the second load-bearing beam (13), the horizontal common connection node including the side anchoring component (5) and the top tie component (7). In the vertical direction, multiple building module units are stacked upwards in sequence, and the load-bearing columns (11) of adjacent building module units are aligned and fixedly connected to form a continuous vertical main load-bearing frame; vertical load transfer contact surfaces are formed between adjacent load-bearing beams.

9. The building system according to claim 8, characterized in that, The top zipper assembly (7) includes: The top connecting steel plate (71) is set above the common first load-bearing beam (12) and / or second load-bearing beam (13) and crosses laterally above the common first load-bearing beam (12) and / or second load-bearing beam (13), with its two ends extending to the top of the sealing beam (21) of the precast floor slab (2) on the left and right sides respectively. The second pre-embedded threaded sleeve (72) is provided on one side of the top of the sealing beam (21); The third fastening bolt (73) passes through the top connecting steel plate (71) and is screwed into the second pre-embedded bolt sleeve (72) to connect the precast floor slabs (2) on the left and right sides with the common first load-bearing beam (12) and / or second load-bearing beam (13) into a whole; Vertical gaps (74) are formed between the corresponding sealing beams (21) of the precast floor slabs (2) on the left and right sides, and between the shared first load-bearing beam (12) and / or second load-bearing beam (13). The vertical gaps (74) are filled with filler, and the top connecting steel plate (71) covers the filler.

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