A new type of modular steel-concrete composite joint

Abstract

The application discloses a novel modular steel-concrete composite joint, comprising a corner column and a sleeve module, the corner column is a right-angle three-axis frame structure, a plurality of corner columns are spliced to form a corner column unit according to needs, the corner column units are connected through the sleeve modules, the sleeve module and the corner column unit are hollow structures, and the hollow structures are filled with concrete. The novel modular steel-concrete composite joint has the characteristics of high connection integrity, safety and reliability, clear force transmission path, replaceable damaged components and the like, and simultaneously has superior anti-seismic performance and detachable and reusable characteristics. The novel modular composite joint adopts a self-recovery device, which not only guarantees the reusability and rapid post-earthquake repairing capacity of the module unit, but also realizes reasonable outward movement of a plastic hinge, and significantly improves the energy consumption and deformation capacity of the structure.

Description

Technical Field

[0001] This application belongs to the field of construction, and specifically relates to a novel modular steel-concrete composite joint. Background Technology

[0002] Modular construction is an important technological path to promote the transformation of the construction industry towards "green, industrialized, and intelligent" construction. As the "core hub" of modular construction, the connection nodes between modules directly determine the safety, seismic resistance, maintainability, and life-cycle economic efficiency of the overall structure.

[0003] Currently, modular building structures are primarily based on pure steel structures. Their joints rely on the plastic deformation of steel to dissipate energy, resulting in irreversible structural damage after an earthquake. This makes it difficult to meet the structural performance requirements of high-rise and super high-rise buildings in seismic zones. Furthermore, existing inter-module connection nodes typically lack replaceable energy dissipation components, leading to concentrated damage in the main module structure during earthquakes. This not only reduces post-earthquake repair efficiency but also limits the reuse of module units. In addition, these node designs often struggle to accommodate the connection needs of different locations such as corner, edge, and center nodes.

[0004] Therefore, developing new modular steel-concrete composite structural systems with replaceability and high performance has become an inevitable trend to promote the development of this field. Utility Model Content

[0005] To address the shortcomings of the prior art, this application provides a novel modular steel-concrete composite joint that improves stability and seismic resistance, and is reusable.

[0006] The technical effect to be achieved in this application is accomplished through the following solution:

[0007] According to a first aspect of this application, a novel modular steel-concrete composite node is provided, comprising corner columns and sleeve modules. The corner columns are orthogonal triaxial frame structures, and several corner columns are spliced ​​together as needed to form corner column units. The corner column units are connected to each other through the sleeve modules. The sleeve modules and the corner column units are hollow structures, and concrete is poured into the hollow structures.

[0008] Preferably, the corner column includes a square steel pipe column and a precast steel beam. There are two precast steel beams fixed to the bottom of the square steel pipe column at a 90-degree angle. The precast steel beams and the square steel pipe column are connected by a plug-in and self-recovering device.

[0009] Preferably, the self-recovering device includes a T-shaped connecting plate, an L-shaped connecting plate, and a constraint plate. The T-shaped connecting plate and the L-shaped connecting plate are clamped together by the two constraint plates and fixed by a butterfly spring bolt.

[0010] Preferably, the T-shaped connecting plate and the L-shaped connecting plate each have a core plate protruding on their opposite sides, the constraint plate clamps the core plate for fixation, and the upper and lower surfaces of the core plate and the inner surface of the constraint plate are provided with anti-slip patterns.

[0011] Preferably, the precast steel beam has a connecting groove at its end, a beam end connecting plate at the front end of the connecting groove, a sealing plate at the top of the connecting groove, and the self-recovering device is installed in the connecting groove.

[0012] Preferably, the sleeve module includes a cross steel frame, the four sides of which are sealed and connected by oblique connecting plates, a shock-absorbing pad is vertically fixed to the outer periphery of the cross steel frame, and a filling rubber is fixed around the central axis of the cross steel frame.

[0013] Preferably, the shock-absorbing pad is welded to the cross steel frame, and rubber layers are applied to both sides of the shock-absorbing pad. After installation, the shock-absorbing pad is located between two adjacent square steel pipe columns.

[0014] Preferably, the square steel pipe column has a slot at one end connected to the sleeve module, the cross steel frame is inserted into the slot, the sleeve module is connected to the square steel pipe column by a one-way bolt, and the left and right square steel pipe columns are connected by tie bolts.

[0015] Preferably, adjacent square steel pipe columns are fixed together by tie bolts.

[0016] According to one embodiment of this application, the beneficial effects of using this novel modular steel-concrete composite node are as follows: This novel modular steel-concrete composite node features strong overall connection, safety and reliability, clear force transmission path, and replaceable seismically damaged components, while also possessing superior seismic performance and reusability. The novel modular composite node employs a self-healing device, which not only ensures the reusability of the modular units and rapid post-earthquake repair capability, but also achieves reasonable outward displacement of the plastic hinge, significantly improving the structure's energy dissipation and deformation capacity.

[0017] The core tube module can reliably connect the various module unit columns, effectively enhancing the overall integrity of the modular structure;

[0018] Furthermore, the new modular steel-concrete composite joint is suitable for corner, edge, and center joints, meeting the requirements of fully prefabricated modular construction. The superior performance of this new joint allows for its widespread application in modular building structural systems, providing strong technical support for the development of modular buildings towards multi-story and high-rise structures. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this application or the existing technical solutions, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of a novel modular steel-concrete composite node in one embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the structure of the edge space node in one embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the corner spatial node in one embodiment of this application;

[0023] Figure 4 for Figure 1 Structural schematic diagram of the Chinese steel pipe column;

[0024] Figure 5 for Figure 1 Schematic diagram showing the location and structure of the Chinese steel pipe columns and precast steel beams;

[0025] Figure 6 for Figure 5 A schematic diagram of the self-recovery device in the middle;

[0026] Figure 7 for Figure 5 Schematic diagram of the precast steel beams;

[0027] Figure 8 for Figure 1 Schematic diagram of the middle sleeve module;

[0028] Figure 9 for Figure 8 Top view of the middle sleeve module;

[0029] Figure 10 for Figure 8 Schematic diagram of the structure of the middle damping pad;

[0030] Figure 11 This is a structural schematic diagram of the sleeve module and the corner column unit;

[0031] Figure 12 This is a top view of the sleeve module and the corner column unit. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] like Figures 1 to 3 As shown, a novel modular steel-concrete composite node in one embodiment of this application includes corner columns and sleeve modules 200. The corner columns are orthogonal triaxial frame structures. Several corner columns are spliced ​​together as needed to form corner column units 100. The corner column units 100 are connected to each other through the sleeve modules 200. The sleeve modules 200 and the corner column units 100 are hollow structures, and concrete is poured into the hollow structures.

[0034] In the non-edge and non-corner space, four corner pillars are spliced ​​together to form a corner pillar unit 100, and the upper and lower corner pillar units 100 are connected by a sleeve module 200; in the edge space, two corner pillars are spliced ​​together to form a corner pillar unit 100, and the upper and lower corner pillar units 100 are connected by a sleeve module 200; in the corner space, a single corner pillar is a corner pillar unit 100, and the upper and lower corner pillars are connected by a sleeve module 200.

[0035] In one embodiment of this application, as Figure 4 and Figure 5 As shown, the corner column includes a square steel pipe column 110 and a precast steel beam 120. Two precast steel beams 120 are fixed to the bottom of the square steel pipe column 110 at a 90-degree angle. The precast steel beams 120 and the square steel pipe column 110 are connected by a plug-in joint and a self-recovering device 130. When connected to the precast steel beam 120, the lower flanges of the square steel pipe column 110 and the precast steel beam 120 are on the same horizontal plane, ensuring a tight fit between the upper and lower steel pipe columns 110 and the precast steel beam 120, thus guaranteeing the integrity of the joint and achieving good collaborative performance.

[0036] like Figure 6 As shown, the self-recovering device 130 includes a T-shaped connecting plate 131, an L-shaped connecting plate 132, and a constraint plate 133. The T-shaped connecting plate 131 and the L-shaped connecting plate 132 are clamped together by the two constraint plates 133 and fixed by the butterfly spring bolts 135.

[0037] The T-shaped connecting plate 131 and the L-shaped connecting plate 132 each have a core plate 134 protruding from their opposite sides. The constraint plate 133 clamps the core plate 134 for fixation. The upper and lower surfaces of the core plate 134 and the inner surface of the constraint plate 133 are provided with anti-slip patterns.

[0038] The self-recovering device 130 is detachable and reusable, enabling rapid recovery of functionality after an earthquake. Simultaneously, it effectively improves energy dissipation at inter-module nodes, achieves controllable damage, and facilitates the outward displacement of plastic hinges, further protecting the safety and reliability of inter-module nodes. Furthermore, the self-recovering device 130 has a simple structure, reducing processing and assembly complexity.

[0039] like Figure 7 As shown, the precast steel beam 120 has a connecting groove 121 at its end, a beam end connecting plate 122 at the front end of the connecting groove 121, a sealing plate 123 at the top of the connecting groove 121, and the self-recovering device 130 is installed in the connecting groove 121.

[0040] The beam end connecting plate 122 is inserted into the square steel tube column 110. At this time, only the bottom row of bolts on the beam end connecting plate 122 is connected using high-strength bolts to achieve the initial positioning and connection of the beam and column. This connection method provides a positioning reference for subsequent assembly through the pre-fixing effect of the bolts, and at the same time initially constrains the relative displacement between the beam end and the column, ensuring the initial alignment accuracy of the beam-column interface.

[0041] After the initial connection of the beam and column is completed, the self-recovering device 130 is placed into the connecting groove 121 of the precast steel beam 120 and connected to the square steel tube column 110 and the precast steel beam 120 by high-strength bolts—at this stage, only the middle row of bolts of the beam end connecting plate 122 is tightened. The self-recovering device 130 is reliably connected to the key parts of the beam-column joint by high-strength bolts, which is designed to dissipate seismic or strong wind energy and drive the joint to generate restorative deformation after the load is unloaded, thereby reducing residual displacement and improving the seismic toughness and recoverability of the joint.

[0042] like Figure 8 and Figure 9 As shown, the sleeve module 200 includes a cross steel frame 210. The four sides of the cross steel frame 210 are sealed and connected by an oblique connecting plate 220. A shock-absorbing pad 230 is vertically fixed on the outer periphery of the cross steel frame 210, and a filling rubber 240 is fixed around the central axis of the cross steel frame 210.

[0043] like Figure 10 As shown, the shock-absorbing pad 230 is welded to the cross steel frame 210. Rubber layers 231 are attached to both sides of the shock-absorbing pad 230. After installation, the shock-absorbing pad 230 is located between two adjacent square steel pipe columns 110.

[0044] The cross-shaped steel frame 210 can effectively ensure the horizontal and vertical connection between each module unit, ensuring the stability of the connection between modules. On the other hand, it facilitates the installation of the square steel column 110 and plays a limiting role.

[0045] The function of the damping pad 230 is twofold: firstly, to ensure a tight fit between adjacent module unit columns, resulting in uniform stress distribution; and secondly, to prevent stress concentration due to gaps between the square steel pipe columns 110 in the core area, which could lead to instability of the module unit corner columns.

[0046] At the same time, energy is also consumed through the contact friction mechanism between adjacent module unit columns and rubber, further improving the integrity between module units.

[0047] The filler rubber 240 is used to fill the gap between the square steel pipe column 110 and the sleeve module 200 to prevent the post-poured concrete slurry from seeping into the gap.

[0048] The square steel pipe column 110 has a slot 111 at one end where it connects to the sleeve module 200. The cross steel frame 210 is inserted into the slot 111 and connected to the square steel pipe column 110 by a one-way bolt. The square steel pipe column 110 adopts a slotted design, the main function of which is to limit the movement of the sleeve module 200 and effectively prevent horizontal misalignment of the square steel pipe column 110.

[0049] like Figure 11 As shown, adjacent square steel columns 110 are connected and fixed by tie bolts 300. Sleeve modules 200 are connected to square steel columns 110 using one-way bolts, and the tie bolts 300 complete the lateral connection of the left and right module units' square steel columns 110—at this stage, only the top row of bolts on the beam end connecting plate 122 is connected. The use of one-way bolts simplifies the unilateral installation operation of the module unit and improves construction efficiency. The connection of sleeve modules 200 to columns via one-way bolts significantly enhances the overall stability of the node core area. The lateral connection of tie bolts 300 enhances the collaborative working performance between the left and right module columns, improving the overall stiffness and lateral force resistance of the structure. The final tightening of the top row of bolts completes the full constraint of the beam end connecting plate 122, ensuring the integrity of the overall node stiffness and force transmission path.

[0050] After assembly, concrete can be poured directly onto the top of the square steel pipe column 110. This design helps save formwork resources and labor costs. Furthermore, after pouring, the concrete is injected into the connection interface between the sleeve module 200 and the square steel pipe column 110. Through the bond force and interface adhesion effect generated during the hardening process, the sleeve module 200 and the square steel pipe column 110 are tightly anchored as a whole. Simultaneously, the high strength of the concrete effectively restricts the lateral displacement of the sleeve module 200 and the square steel pipe column 110, preventing relative slippage or separation. This strengthens the continuity of force transmission at the connection interface, enhances the collaborative load-bearing capacity of the sleeve module 200 and the square steel pipe column 110, and significantly improves the overall mechanical performance of the new node.

[0051] The fabrication and assembly process of the novel modular steel-concrete composite node in this application is as follows:

[0052] The factory processes connecting components such as square steel pipe columns 110, precast steel beams 120, cross steel frames 210, inclined connecting plates 220, shock-absorbing pads 230, rubber, and self-recovering devices 130.

[0053] In the factory, the square steel pipe column 110 is bolted to the precast steel beam 120 and the self-recovering device 130, while the cross steel frame 210, the oblique connecting plate 220, and the shock-absorbing pad 230 are welded together. Note: The bolts connecting the square steel pipe column 110 and the precast steel beam 120 are only connected to the bottom row, and the bolts connecting the self-recovering device 130 to the square steel pipe column 110 and the precast steel beam 120 are only connected to the middle row.

[0054] After each component is transported to the site, the corner posts of the four lower module units are fixed first, and then the sleeve module 200 is used for positioning. The four lower corner posts are then connected to the sleeve module using one-way bolts and tie bolts 300 respectively.

[0055] Next, the corner posts of the upper four module units are installed, and the upper four corner posts are connected to the sleeve module using one-way bolts and tie bolts 300. Finally, the precast steel beams 120 flanges of the upper and lower module units are connected using high-strength bolts.

[0056] After the assembly of each corner node is completed, concrete is poured into the upper square steel pipe column 110. The concrete will then fill the entire square steel pipe column 110, forming a new type of node as a whole.

[0057] This novel modular steel-concrete composite node features strong overall connection, reliable safety, clear force transmission path, and replaceable seismically damaged components. It also boasts superior seismic performance and reusability. The new modular composite node employs a self-recovering device 130, which not only ensures the reusability of the modular units and rapid post-earthquake repair capabilities but also allows for the reasonable outward displacement of the plastic hinge, significantly improving the structure's energy dissipation and deformation capacity.

[0058] The core tube module can reliably connect the various module unit columns, effectively enhancing the overall integrity of the modular structure.

[0059] Furthermore, the new modular steel-concrete composite joint is suitable for corner, edge, and center joints, meeting the requirements of fully prefabricated modular construction. The superior performance of this new joint allows for its widespread application in modular building structural systems, providing strong technical support for the development of modular buildings towards multi-story and high-rise structures.

[0060] It should be noted that the above detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0061] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0062] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0063] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0064] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0065] In the detailed description above, reference has been made to the accompanying drawings, which form part of this document. In the drawings, similar symbols typically identify similar parts unless the context otherwise indicates otherwise. The illustrated embodiments described in the detailed specification, drawings, and claims are not intended to be limiting. Other embodiments may be used and other changes may be made without departing from the spirit or scope of the subject matter presented herein.

[0066] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A novel modular steel-concrete composite joint, characterized in that, It includes corner posts and sleeve modules. The corner posts are orthogonal triaxial frame structures. Several corner posts are spliced ​​together as needed to form corner post units. The corner post units are connected to each other through the sleeve modules. The sleeve modules and corner post units are hollow structures, and concrete is poured into the hollow structures.

2. The novel modular steel-concrete composite node according to claim 1, characterized in that, The corner column includes a square steel pipe column and a precast steel beam. There are two precast steel beams fixed to the bottom of the square steel pipe column at a 90-degree angle. The precast steel beams and the square steel pipe column are connected by a plug-in and self-recovering device.

3. The novel modular steel-concrete composite node according to claim 2, characterized in that, The self-recovering device includes a T-shaped connecting plate, an L-shaped connecting plate, and a constraint plate. The T-shaped connecting plate and the L-shaped connecting plate are clamped together by two constraint plates and fixed by a butterfly spring bolt.

4. The novel modular steel-concrete composite node according to claim 3, characterized in that, The T-shaped connecting plate and the L-shaped connecting plate each have a protruding core plate on their opposite sides. The constraint plate clamps the core plate for fixation. The upper and lower surfaces of the core plate and the inner surface of the constraint plate are provided with anti-slip patterns.

5. The novel modular steel-concrete composite node according to claim 2, characterized in that, The precast steel beam has a connecting groove at its end, a beam end connecting plate at the front end of the connecting groove, a sealing plate at the top of the connecting groove, and the self-recovering device is installed in the connecting groove.

6. The novel modular steel-concrete composite node according to claim 2, characterized in that, The sleeve module includes a cross steel frame, which is sealed and connected around its perimeter by oblique connecting plates. A shock-absorbing pad is vertically fixed to the outer perimeter of the cross steel frame, and a filling rubber is fixed around the central axis of the cross steel frame.

7. The novel modular steel-concrete composite node according to claim 6, characterized in that, The shock-absorbing pad is welded to the cross steel frame, and rubber layers are attached to both sides of the shock-absorbing pad. After installation, the shock-absorbing pad is located between two adjacent square steel pipe columns.

8. The novel modular steel-concrete composite node according to claim 6, characterized in that, The square steel pipe column is connected to the sleeve module at one end with a slot. The cross steel frame is inserted into the slot. The sleeve module and the square steel pipe column are connected by one-way bolts, and the left and right square steel pipe columns are connected by tie bolts.

9. The novel modular steel-concrete composite node according to claim 2, characterized in that, The adjacent square steel pipe columns are fixed together by tie bolts.

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