Connecting joint of modular stacking box building

Abstract

The invention discloses a connecting joint of a modular stack box building. The connecting joint comprises an upper corner fitting box, a lower corner fitting box, a main joint plate, a connecting end plate, an upper shear-resistant piece, a lower shear-resistant piece, an upper pin shaft and a lower pin shaft. The upper corner fitting box is arranged above the main gusset plate, the lower corner fitting box is arranged below the main gusset plate, an upper bracket is welded to the outer side face of the upper corner fitting box, a lower bracket is welded to the outer side face of the lower corner fitting box, and the connecting end plate is welded to the upper bracket and the lower bracket so as to connect the upper corner fitting box and the lower corner fitting box; the upper anti-shearing piece is fixedly arranged on the upper end face of the main gusset plate and located in the upper corner fitting box, and the upper pin shaft is connected with the upper anti-shearing piece and the upper corner fitting box; the lower anti-shearing piece is fixedly arranged on the lower end face of the main gusset plate and located in the lower corner fitting box, and the lower pin shaft is connected with the lower anti-shearing piece and the lower corner fitting box. The shear resistance, the pulling resistance, the bending bearing capacity and the seismic ductility of a joint area can be enhanced, and disassembly is easy.

Description

Technical Field

[0001] The invention relates to the field of steel structure buildings, in particular to a connection node of a modular stacked box building. Background Art

[0002] Research on modular stacked-box building systems is still under development, with stacked-box connection nodes being a primary focus. Existing modular stacked-box building connections primarily include bolted, tie-rod, and grouting connections. In actual engineering applications, certain adjustments are made to these three basic solutions: Option 1: If Figure 1 As shown in the figure, multiple bolts are set at the top and bottom plates of the upper and lower modules to connect the upper and lower modules. The node connection is located outside the core area. The cost of the entire node is relatively low, but the overall strength of the node is poor. There is insufficient operating space at the local position of the node plate connection; the assembly rate is low. Option 2: If Figure 2 As shown, the upper and lower modules are connected by a combination of bolts and grouting, resulting in high overall shear strength. The grouting process has good tolerance for node installation errors, and local deviations can be controlled by adjusting the flange length of the shear member on site. Single bolt nodes are convenient for construction, but bolt connection and grouting processes are used simultaneously. The connection strength between the upper and lower columns is insufficient, and there is a lack of effective pull-out resistance structural measures. Option 3: If Figure 3 As shown, four bolts are installed in the corner box to connect the upper and lower modules. The node forms a certain resistance moment and can withstand a certain bending moment. The node size is relatively small, but the four bolts are difficult to install and require special installation tools. The opening on the side of the corner box is large, which has a certain impact on the strength of the column base. Option 4: If Figure 4 As shown, it adds anti-pullout and anti-shear parts with limit plates on the basis of grouting method, and uses the shear strength of the triangular limit plates and the bonding strength provided by the high-strength grouting material to make the connection node have higher tensile and shear strength and certain bending strength. However, the processing of the self-positioning grouting node is complicated; the shear parts with limit plates occupy most of the volume in the corner box, the gripping force provided by the concrete grouting material is insufficient, and with the increase of service life and the long-term influence of horizontal wind loads, the overall bearing capacity of the node will continue to decrease; there is no connection between the upper and lower column wall panels, and they are only connected by the built-in anti-pullout and anti-shear parts, which greatly weakens the bending stiffness of the node; and the detachable process cannot be achieved. Summary of the Invention

[0003] In order to solve the problems in the prior art, the present invention provides a connection node for a modular stacked box building.

[0004] The present invention discloses a connection node of a modular stacked box building, comprising an upper corner box and a lower corner box, wherein the top of the upper corner box is fixedly connected to the bottom of the upper column, and the bottom of the lower corner box is fixedly connected to the top of the lower column. The connection node also includes a main node plate, a connecting end plate, an upper shear member, a lower shear member, an upper pin shaft and a lower pin shaft; the upper corner box is arranged above the main node plate, the lower corner box is arranged below the main node plate, and an upper bullnose is welded on the outer surface of the upper corner box. Leg, a lower corbel is welded on the outer side surface of the lower corner fitting box, the connecting end plate is welded to the upper corbel and the lower corbel to connect the upper corner fitting box and the lower corner fitting box; the upper shear member is fixed on the upper end surface of the main node plate and is located in the upper corner fitting box, the upper pin connects the upper shear member and the upper corner fitting box; the lower shear member is fixed on the lower end surface of the main node plate and is located in the lower corner fitting box, the lower pin connects the lower shear member and the lower corner fitting box.

[0005] In some embodiments, the upper corbel and the lower corbel are both hollow; one end of the upper pin shaft is located in the space inside the upper corbel, and one end of the lower pin shaft is located in the space inside the lower corbel, and the connecting end plate connects the upper corner box and the lower corner box while also closing the space inside the upper corbel and the lower corbel.

[0006] In some embodiments, the upper corbel and the lower corbel each include two mutually parallel transverse plates and two mutually parallel vertical plates, one end of the transverse plate and the vertical plate of the upper corbel are welded to the outer side surface of the upper corner piece box, and one end of the transverse plate and the vertical plate of the lower corbel are welded to the outer side surface of the lower corner piece box; the two transverse plates and the two vertical plates of the upper corbel are connected end to end to form a hollow setting of the upper corbel, and the two transverse plates and the two vertical plates of the lower corbel are connected end to end to form a hollow setting of the lower corbel.

[0007] In some embodiments, the connecting end plate is a U-shaped end plate, and the U-shaped end plate includes a vertical side plate and a top plate and a bottom plate respectively connected to the top and lower ends of the side plates. Before the U-shaped end plate is welded to the upper corbel and the lower corbel, the top plate of the U-shaped end plate cooperates with the transverse plate of the upper corbel away from the lower corbel, and the bottom plate of the U-shaped end plate cooperates with the transverse plate of the lower corbel away from the upper corbel, so that the U-shaped end plate is clamped on the upper corbel and the lower corbel.

[0008] In some embodiments, the upper corner piece box includes an upper X-direction inward protrusion and an upper Y-direction inward protrusion; the upper X-direction inward protrusion is formed by extending from the bottom end of the first side wall of the upper corner piece box to the second side wall, the first side wall and the second side wall of the upper corner piece box are arranged opposite to each other, and the distance between the end of the upper X-direction inward protrusion and the second side wall of the upper corner piece box is adapted to the width of the upper shear member; the upper Y-direction inward protrusion is formed by extending from the bottom end of the third side wall and the bottom end of the fourth side wall of the upper corner piece box, the bottom end of the third side wall and the fourth side wall of the upper corner piece box are arranged opposite to each other, and the distance between the two ends of the upper Y-direction inward protrusion is adapted to the length of the upper shear member.

[0009] In some embodiments, the lower corner piece box includes a lower X-direction inward protrusion and a lower Y-direction inward protrusion; the lower X-direction inward protrusion is formed by extending from the top end of the first side wall of the lower corner piece box to the second side wall, the first side wall and the second side wall of the lower corner piece box are arranged opposite to each other, and the distance between the end of the lower X-direction inward protrusion and the second side wall of the lower corner piece box is adapted to the width of the lower shear member; the lower Y-direction inward protrusion is formed by extending from the top end of the third side wall and the top end of the fourth side wall of the lower corner piece box toward each other, the bottom end of the third side wall of the lower corner piece box is arranged opposite to the fourth side wall, and the distance between the two ends of the lower Y-direction inward protrusion is adapted to the length of the lower shear member.

[0010] In some embodiments, an upper mounting socket cooperating with the upper pin shaft is provided on the side wall of the upper corner piece box, and an upper hole reinforcement ring plate coaxially arranged with the upper mounting socket is welded on the side wall of the upper corner piece box; a lower mounting socket cooperating with the lower pin shaft is provided on the side wall of the lower corner piece box, and a lower hole reinforcement ring plate coaxially arranged with the lower mounting socket is welded on the side wall of the lower corner piece box.

[0011] In some embodiments, the axis of the upper pin is parallel to the long side of the upper corner piece box; the axis of the lower pin is parallel to the long side of the lower corner piece box.

[0012] In some embodiments, an outer side surface of the upper corner fitting box is fixedly connected to the main beam of the upper box-type module, the outer side surface of the upper corner fitting box to which the upper corbel is welded is arranged opposite to the outer side surface of the main beam connected to the upper box-type module, and the upper pin shaft is staggered with the main beam of the upper box-type module; In some embodiments, the outer side surface of the lower corner box to which the lower corbel is welded is arranged opposite to the outer side surface of the main beam connected to the lower box-type module, and the lower pin shaft is staggered with the main beam of the lower box-type module.

[0013] In some embodiments, the connection node of the modular stacked box building further includes a connection plate, the upper corner box, the lower corner box and the connection end plate are each provided in two and symmetrically arranged, the connection plate is arranged between the two connection end plates, and one end of the connection plate is fixedly connected to one connection end plate, and the other end of the connection plate is fixedly connected to the other connection end plate.

[0014] Beneficial effects of the invention: The invention discloses a connection node of a modular stacked box building, comprising an upper corner box and a lower corner box, the top of the upper corner box being fixedly connected to the bottom of the upper column, the bottom of the lower corner box being fixedly connected to the top of the lower column, the connection node also comprising a main node plate, a connecting end plate, an upper shear member, a lower shear member, an upper pin shaft and a lower pin shaft; the upper corner box is arranged above the main node plate, the lower corner box is arranged below the main node plate, the upper An upper corbel is welded on the outer side of the upper corner box, a lower corbel is welded on the outer side of the lower corner box, the connecting end plate and the upper corbel are welded as well as the lower corbel to connect the upper corner box and the lower corner box; the upper shear member is fixed on the upper end face of the main node plate and is located in the upper corner box, the upper pin connects the upper shear member and the upper corner box; the lower shear member is fixed on the lower end face of the main node plate and is located in the lower corner box, the lower pin connects the lower shear member and the lower corner box.

[0015] By setting an outward-extending upper corbel and lower corbel, and welding the connecting end plate to the upper corbel and the lower corbel, a first line of seismic fortification is formed; by setting an upper shear member and a lower shear member, and setting an upper pin shaft connecting the upper shear member and the upper corner box, and a lower pin shaft connecting the lower shear member and the lower corner box, a second line of seismic fortification is formed.

[0016] Relative to Figure 1 The semi-rigid connection scheme using bolts is shown. The two seismic fortifications in the connection nodes of the modular stacked box building provided by the present invention make the overall performance strength of the node higher and the inter-story displacement smaller.

[0017] Relative to Figure 2 The connection solution shown uses bolts combined with grouting. The connection nodes of the modular stacked box building provided by the embodiment of the present invention adopt a dry process, that is, no grouting is used, which can effectively improve the durability of the steel structure in the node area, and by setting two seismic protections, the connection strength and pull-out resistance between the upper and lower columns are improved.

[0018] Relative to Figure 3 The semi-rigid connection scheme using bolts is shown. In the embodiment of the present invention, the corner box of the connection node of the modular stacked box building only has installation holes that cooperate with the pin shaft. The opening is smaller, has less impact on the strength of the column base, is easy to install, and has higher building comfort performance under the action of horizontal forces.

[0019] Relative to Figure 4 The modular stacked box building shown in this embodiment utilizes a connection scheme combining grouting and shear members. Both layers of seismic protection at the connection points of the modular stacked box building utilize a dry process, effectively improving the durability of the steel structure in the joint area. Furthermore, the first layer of seismic protection directly connects the upper and lower corner boxes, effectively enhancing the structural integrity. Simply mechanically dismantling the connecting end plates on the corbels and removing the pins allows for complete, non-destructive separation of the modular boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the structure of the connection node of Solution 1 in the background technology, where a is an elevation view and b is a top view; Figure 2 A schematic diagram of the structure of the connection nodes of Solution 2 in the background technology; Figure 3 Schematic diagram of the structure of the connection node of solution 3 in the background art, where c is the elevation view and d is the top view; Figure 4 Schematic diagram of the structure of the connection node of solution 3 in the background art, where e is a cross-sectional view of the entire node, and f is a cross-sectional view of the connection plate and the shear member in another direction; Figure 5 A top view of an application scenario of a connection node of a modular stacked container building provided by an embodiment of the present invention; Figure 6 for Figure 5 A 3-3 sectional view of a connection node of the modular stacked box building shown; Figure 7 for Figure 5 A 1-1 cross-sectional view of a connection node of the modular stacked box building shown; Figure 8 for Figure 5 A 2-2 cross-sectional view of a connection node of the modular stacked box building shown; Figure 9 A vertical cross-sectional view of a main gusset plate and shear members in a modular stacked box building provided in one embodiment of the present invention; Figure 10 An axonometric view of a connection node of a modular stacked container building provided by another embodiment of the present invention; Figure numbers: 10, main node plate; 101, auxiliary mounting hole; 20, connecting end plate; 201, side plate; 202, top plate; 203, bottom plate; 30, upper corner box; 301, upper X-direction inward convex portion; 302, upper Y-direction inward convex portion; 40, lower corner box; 401, lower X-direction inward convex portion; 402, lower Y-direction inward convex portion; 50, upper corbel; 501, transverse plate; 502, vertical plate; 60, lower corbel; 70, upper shear member; 701, through hole; 80, lower shear member; 90, upper pin; 901, anchor bolt head; 100, lower pin; 110, upper opening reinforcement ring plate; 120, lower opening reinforcement ring plate; 130, connecting plate. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] It will be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0024] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0025] It should also be understood that the terms used in the present specification are only for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should be further understood that the terms "and, or" used in the present description and the appended claims refer to and include any and all possible combinations of one or more of the associated listed items.

[0027] See also Figures 5 to 9 , Figure 5 A top view of an application scenario of a connection node of a modular stacked container building provided by an embodiment of the present invention; Figure 6 for Figure 5 A 3-3 sectional view of a connection node of the modular stacked box building shown; Figure 7 for Figure 5 A 1-1 cross-sectional view of a connection node of the modular stacked box building shown; Figure 8 for Figure 5 A 2-2 cross-sectional view of a connection node of the modular stacked box building shown; Figure 9 A vertical cross-sectional view of a main gusset plate and shear members in a modular stacked box building provided in one embodiment of the present invention; Figure 10 An axonometric view of connection nodes of a modular stacked container building provided in another embodiment of the present invention.

[0028] like Figures 5 to 9 As shown, an embodiment of the present invention discloses a connection node for a modular stacked box building. The connection node is used in a scenario where steel structure box modules are stacked and spliced ​​up and down. The connection node can set two seismic fortification structures for the modular stacked box building to ensure the overall seismic performance of the modular stacked box building.

[0029] In one embodiment, the connection node includes an upper corner box 30 and a lower corner box 40, the top of the upper corner box 30 is fixedly connected to the bottom of the upper column, and the bottom of the lower corner box 40 is fixedly connected to the top of the lower column. The connection node also includes a main node plate 10, a connecting end plate 20, an upper shear member 70, a lower shear member 80, an upper pin 90 and a lower pin 100; the upper corner box 30 is arranged above the main node plate 10, and the lower corner box 40 is arranged below the main node plate 10. An upper corbel 50 is welded to the outer surface of the upper corner box 30, and the lower corner A lower corbel 60 is welded to the outer surface of the box 40, and the connecting end plate 20 is welded to the upper corbel 50 and the lower corbel 60 to connect the upper corner fitting box 30 and the lower corner fitting box 40; the upper shear member 70 is fixed on the upper end surface of the main node plate 10 and is located in the upper corner fitting box 30, and the upper pin 90 connects the upper shear member 70 and the upper corner fitting box 30; the lower shear member 80 is fixed on the lower end surface of the main node plate 10 and is located in the lower corner fitting box 40, and the lower pin 100 connects the lower shear member 80 and the lower corner fitting box 40.

[0030] In this embodiment, the upper corner box 30 is the corner box at the bottom of the upper box-shaped module. It is square in shape, with the upper column, the column of the upper box-shaped module, connected to its top. Its two perpendicular outer surfaces are connected to the main beam and side beams of the upper box-shaped module. The lower corner box 40 is the corner box at the top of the lower box-shaped module. It is square in shape, with the lower column, the column of the lower box-shaped module, connected to its bottom. Its two perpendicular outer surfaces are connected to the main beam and side beams of the lower box-shaped module. By connecting the upper corner box 30 and the lower corner box 40 to connect the upper and lower box-shaped modules, the design concept of module-first, then whole is adopted, fully utilizing the lateral stiffness of the individual module boxes. The main gusset plate 10 is used to receive the upper corner box 30 and the lower corner box 40, and provides horizontal X and Y constraints on the upper and lower corner boxes 30, 40, thereby limiting horizontal movement of the upper and lower box-type modules relative to the main gusset plate 10. The outer side of the upper corner box 30, to which the upper corbel 50 is welded, is not connected to the main beam or side beam. Similarly, the outer side of the lower corner box 40, to which the lower corbel 60 is welded, is also not connected to the main beam or side beam. That is, the upper corbel 50 and the lower corbel 60 are located on the outer side of the entire module box, making it convenient to connect the upper and lower corbels 50 and 60 via the connecting end plates 20 during on-site assembly. The welding of the upper corbel 50 to the upper corner box 30 and the welding of the lower corbel 60 to the upper corner box 30 are both completed during factory prefabrication of the module box. The outer side of the upper corner box 30 to which the upper corbel 50 is welded is flush with the outer side of the lower corner box 40 to which the lower corbel 60 is welded, and the upper and lower corbels 50 and 60 have the same size, thereby facilitating the use of the regularly shaped connecting end plate 20 for welding to the upper and lower corbels 50 and 60. By welding the connecting end plate 20 to the upper and lower corbels 50 and 60, the upper and lower corner box 30 and 40 are securely connected, thereby securely connecting the upper and lower box-type modules in the vertical direction, thereby preventing relative displacement between the upper and lower box-type modules in the vertical plane. Together with the X- and Y-direction constraints in the horizontal plane provided by the main node plate 10, these form a rigid constraint on the upper and lower box-type modules, thus forming the first line of seismic fortification.

[0031] In this embodiment, both the upper and lower pins 90, 100 are made of high-strength steel, offering enhanced deformation resistance. The upper shear member 70 is welded to the upper end surface of the main gusset plate 10 and located within the upper corner fitting box 30. The upper pin 90 securely connects the upper shear member 70 to the upper corner fitting box 30, effectively improving the shear resistance of the upper box-shaped module. The lower shear member 80 is welded to the lower end surface of the main gusset plate 10 and located within the lower corner fitting box 40. The lower pin 100 securely connects the lower shear member 80 to the lower corner fitting box 40, effectively improving the shear resistance of the lower box-shaped module. This prevents the vertically disposed end plate 20 from further buckling due to large horizontal forces, thereby enhancing the overall shear and bending resistance of the connection node. Furthermore, because the upper and lower shear members 70 and 80 are welded to the primary gusset plate 10 (completed during factory prefabrication), and the upper pin 90 connects the upper shear member 70 to the upper corner box 30, and the lower pin 100 connects the lower shear member 80 to the lower corner box 40, the pullout resistance at these connection points is enhanced. This creates a second layer of seismic fortification.

[0032] In summary, the embodiment of the present invention can greatly enhance the shear, pull-out, bending bearing capacity and seismic ductility of the node area by setting a combined node of extended bracket welding combined with pin shaft connection shear parts, and at the same time can effectively play the seismic energy dissipation role of the node area. When multiple modules are spliced, there are multiple such connection nodes, which improves the seismic performance of the overall modular stacked box building.

[0033] In a further embodiment, the side wall of the upper corner piece box 30 is provided with an upper mounting socket that cooperates with the upper pin shaft 90, and the side wall of the upper corner piece box 30 is also welded with an upper hole reinforcement ring plate 110 that is coaxially arranged with the upper mounting socket; the side wall of the lower corner piece box 40 is provided with a lower mounting socket that cooperates with the lower pin shaft 100, and the side wall of the lower corner piece box 40 is also welded with a lower hole reinforcement ring plate 120 that is coaxially arranged with the lower mounting socket.

[0034] In this embodiment, the upper hole reinforcement ring plate 110 is described as an example. Oppositely arranged upper mounting holes are provided on the two oppositely arranged side walls of the upper corner piece box 30. The upper hole reinforcement ring plate 110 is welded to the outer sides of the two oppositely arranged side walls of the upper corner piece box 30 and is coaxially arranged with the upper mounting holes. It is used to reinforce the strength of the corner piece box to compensate for the influence of the upper mounting holes on the strength of the upper corner piece box 30. In addition, the upper hole reinforcement ring plate 110 also serves to increase the length of the contact surface between the upper pin shaft 90 and the upper corner piece box 30 to make its connection more reliable. The upper shear member 70 also has a through hole 701 opposite to the upper mounting socket. When assembling the upper corner box 30 and the upper shear member 70, the upper corner box 30 is placed on the main node plate 10. After adjusting the position to align the upper mounting socket and the through hole 701, the upper pin 90 is passed through the upper hole reinforcement ring plate 110 of one side wall, the upper mounting socket, the through hole 701 of the upper shear member 70, the upper hole reinforcement ring plate 110 and the upper mounting socket on the other side wall in sequence. An anchor head 901 is provided at one end of the upper pin 90, the size of which is larger than the diameter of the upper mounting socket and the inner diameter of the upper hole reinforcement ring plate 110 to prevent the upper pin 90 from falling out from the end away from the anchor head 901.

[0035] The function and positional relationship of lower opening reinforcement ring plate 120, the specific structure of lower shear member 80, and the specific structure and installation sequence of lower pin 100 can be referenced to the upper opening reinforcement ring plate 110, upper shear member 70, and upper pin 90, and will not be further described here. The creation of the various mounting holes and through-holes 701, as well as the welding of the opening reinforcement ring plate, are all completed during factory prefabrication.

[0036] In a further embodiment, the upper corner piece box 30 includes an upper X-direction inward protrusion 301 and an upper Y-direction inward protrusion 302; the upper X-direction inward protrusion 301 is formed by extending from the bottom end of the first side wall of the upper corner piece box 30 to the second side wall, and the first side wall and the second side wall of the upper corner piece box 30 are arranged opposite to each other, and the distance between the end of the upper X-direction inward protrusion 301 and the second side wall of the upper corner piece box 30 is adapted to the width of the upper shear member 70; the upper Y-direction inward protrusion 302 is formed by extending from the bottom end of the third side wall and the bottom end of the fourth side wall of the upper corner piece box 30, and the bottom end of the third side wall and the fourth side wall of the upper corner piece box 30 are arranged opposite to each other, and the distance between the two ends of the upper Y-direction inward protrusion 302 is adapted to the length of the upper shear member 70.

[0037] In this embodiment, when the upper box-type module is assembled onto the main node plate 10 at the construction site, since the upper shear member 70 has been pre-welded to the main node plate 10, the upper shear member 70 can cooperate with the upper X-direction inward protrusion 301 and the upper Y-direction inward protrusion 302 to position the upper box-type module. That is, only when the area between the upper X-direction inward protrusion 301 and the upper Y-direction inward protrusion 302 is aligned with the upper shear member 70 can the upper box-type module be placed on the main node plate 10. After placement, since the distance between the end of the upper X-direction inward protrusion 301 and the second side wall is adapted to the width of the upper shear member 70, and the distance between the two ends of the upper Y-direction inward protrusion 302 is adapted to the length of the upper shear member 70, the upper shear member 70 can limit the horizontal displacement of the upper box-type module, thereby providing X-direction and Y-direction constraints on the upper box-type module in the horizontal plane together with the main node plate 10.

[0038] In a further embodiment, the lower corner piece box 40 includes a lower X-direction inward protrusion 401 and a lower Y-direction inward protrusion 402; the lower X-direction inward protrusion 401 is formed by extending from the top end of the first side wall of the lower corner piece box 40 to the second side wall, and the first side wall and the second side wall of the lower corner piece box 40 are arranged opposite to each other, and the distance between the end of the lower X-direction inward protrusion 401 and the second side wall of the lower corner piece box 40 is adapted to the width of the lower shear member 80; the lower Y-direction inward protrusion 402 is formed by extending from the top end of the third side wall and the top end of the fourth side wall of the lower corner piece box 40, and the bottom end of the third side wall of the lower corner piece box 40 is arranged opposite to the fourth side wall, and the distance between the two ends of the lower Y-direction inward protrusion 402 is adapted to the length of the lower shear member 80.

[0039] In this embodiment, when the main gusset plate 10 is assembled to the lower box-type module at the construction site, since the lower shear member 80 is pre-welded to the main gusset plate 10, the lower shear member 80 can cooperate with the lower X-direction inward protrusion 401 and the lower Y-direction inward protrusion 402 to position the main gusset plate 10. That is, the main gusset plate 10 can only be placed on the lower box-type module by aligning the lower shear member 80 with the area between the lower X-direction inward protrusion 401 and the lower Y-direction inward protrusion 402. After placement, since the distance between the end of the lower X-direction inward protrusion 401 and the second side wall matches the width of the lower shear member 80, and the distance between the two ends of the lower Y-direction inward protrusion 402 matches the length of the lower shear member 80, the lower shear member 80 can limit the horizontal displacement of the lower box-type module, thereby providing X-direction and Y-direction constraints on the lower box-type module in the horizontal plane together with the main gusset plate 10.

[0040] In a further embodiment, the axis of the upper pin 90 is parallel to the long side of the upper corner piece box 30 ; the axis of the lower pin 100 is parallel to the long side of the lower corner piece box 40 .

[0041] In this embodiment, the upper pin 90 and the upper corner fitting box 30 are used as examples. The side corresponding to the first (second) side wall of the upper corner fitting box 30 is its long side, and the side corresponding to the third (fourth) side wall of the upper corner fitting box 30 is its short side. Upper mounting holes are provided on the third and fourth side walls of the upper corner fitting box 30, and the upper bracket 50 is welded to the outer surface of the third side wall of the upper corner fitting box 30. Because the bending resistance of the upper corner fitting box 30 in the X-direction is lower than its bending resistance in the Y-direction, the high-strength upper pin 90 is positioned parallel to the long side of the upper corner fitting box 30 to improve its bending resistance. The detailed installation relationship and function of the lower pin 100 and the lower corner fitting box 40 can be found in the upper pin 90 and upper corner fitting box 30 section and will not be further described here.

[0042] In a further embodiment, the main beam of the upper box-type module is fixedly connected to an outer side surface of the upper corner fitting box 30, the outer side surface of the upper corner fitting box 30 to which the upper corbel 50 is welded is arranged opposite to the outer side surface of the main beam connected to the upper box-type module, and the upper pin shaft 90 is staggered with the main beam of the upper box-type module; the main beam of the lower box-type module is fixedly connected to an outer side surface of the lower corner fitting box 40, the outer side surface of the lower corbel 60 welded to the lower corner fitting box 40 is arranged opposite to the outer side surface of the main beam connected to the lower box-type module, and the lower pin shaft 100 is staggered with the main beam of the lower box-type module.

[0043] In this embodiment, using the upper corner box 30 as an example, the main beam of the upper box-shaped module is fixedly connected to the outer surface of the fourth side wall of the upper corner box 30, the side beam is fixedly connected to the outer surface of the second side wall of the upper corner box 30, and the upper corbel 50 is welded to the outer surface of the third side wall of the upper corner box 30. Therefore, the upper pin 90 is staggered with the main beam, that is, the upper pin 90 is closer to the second side wall of the upper corner box 30, while the main beam is closer to the first side wall of the upper corner box 30. This prevents the end of the upper pin 90, not provided with the anchor head 901, from colliding with the main beam when it passes through the fourth side wall. The specific positional relationship and function of the lower pin 100 and the main beam of the lower box-shaped module can be found in the description of the upper pin 90 and will not be repeated here.

[0044] In a further embodiment, the upper corbel 50 and the lower corbel 60 are both hollow; one end of the upper pin shaft 90 is located in the space inside the upper corbel 50, and one end of the lower pin shaft 100 is located in the space inside the lower corbel 60. The connecting end plate 20 connects the upper corner piece box 30 and the lower corner piece box 40 while also closing the space inside the upper corbel 50 and the lower corbel 60.

[0045] In this embodiment, the end of the upper pin 90 located within the space inside the upper corbel 50 is the end provided with the anchor head 901, and the end of the lower pin 100 located within the space inside the lower corbel 60 is the end provided with the anchor head 901. The connecting end plate 20 encloses the spaces inside the upper and lower corbels 50 and 60. Therefore, in addition to reliably connecting the upper and lower corner fitting boxes 30 and 40 as described in the above-mentioned embodiments, the connecting end plate 20 also serves to limit the upper and lower pins 90 and 100, thereby preventing the upper and lower pins 90 and 100 from escaping from the upper and lower corner fitting boxes 30 and 40 at the ends provided with the anchor heads 901.

[0046] In a further embodiment, the upper corbel 50 and the lower corbel 60 each include two mutually parallel transverse plates 501 and two mutually parallel vertical plates 502, one end of the transverse plate 501 and the vertical plate 502 of the upper corbel 50 are welded to the outer side surface of the upper corner piece box 30, and one end of the transverse plate 501 and the vertical plate 502 of the lower corbel 60 are welded to the outer side surface of the lower corner piece box 40; the two transverse plates 501 and the two vertical plates 502 of the upper corbel 50 are connected end to end to form a hollow setting of the upper corbel 50, and the two transverse plates 501 and the two vertical plates 502 of the lower corbel 60 are connected end to end to form a hollow setting of the lower corbel 60.

[0047] In this embodiment, the upper corbel 50 is used as an example. Its two transverse plates 501 are of identical size and are welded perpendicularly to the third side wall of the upper corner fitting box 30. One transverse plate 501 is positioned flush with the top of the upper corner fitting box 30, while the other transverse plate 501 is positioned flush with the bottom of the upper corner fitting box 30. Two vertical plates 502 are welded perpendicularly to the same side wall, i.e., the third side wall, as are the transverse plates 501, and are joined end to end. The length by which the transverse plates 501 protrude from the third side wall of the upper corner fitting box 30 is the same as the length by which the vertical plates 502 protrude from the third side wall of the upper corner fitting box 30. One end of the transverse plate 501 and the vertical plate 502 of the upper corbel 50 are welded to the outer surface of the third side wall of the upper corner fitting box 30, thereby forming an opening at the other end. The intermediate area enclosed by the transverse plate 501 and the vertical plate 502 constitutes the internal space of the upper corbel 50 described in the above embodiment. When installing the upper pin 90, the end without the anchor head 901 is inserted through the opening of the upper corbel 50 into the upper installation socket of the side wall of the upper corner fitting box 30. After the upper pin 90 is installed, the end with the anchor head 901 is located within the space of the upper corbel 50. After the connecting end plate 20 and the upper corbel 50 are welded together, the connecting end plate 20 closes the opening, thereby sealing the internal space of the upper corbel 50. The upper corbel 50 can be integrally formed or welded separately. The specific structure of the lower corbel 60 and its position and connection relationship with the lower corner box 40 can be referred to the part of the upper corbel 50, and will not be repeated here.

[0048] In a further embodiment, the connecting end plate 20 is a U-shaped end plate, and the U-shaped end plate includes a vertical side plate 201 and a top plate 202 and a bottom plate 203 respectively connected to the top and lower ends of the side plate 201. Before the U-shaped end plate is welded to the upper corbel 50 and the lower corbel 60, the top plate 202 of the U-shaped end plate cooperates with the transverse plate 501 of the upper corbel 50 away from the lower corbel 60, and the bottom plate 203 of the U-shaped end plate cooperates with the transverse plate 501 of the lower corbel 60 away from the upper corbel 50, so that the U-shaped end plate is clamped on the upper corbel 50 and the lower corbel 60.

[0049] In this embodiment, the connecting end plate 20 is Figure 6The U-shaped end plate is convenient to install and can be installed on the upper and lower legs of the vehicle body 200, 201 and 202 of the vehicle body 200. The U-shaped end plate is convenient to install and can be installed on the upper and lower legs of the vehicle body 200, 201 and 202 of the vehicle body 200.

[0050] In one embodiment, the connection node of the modular stacked box building further includes a connection plate 130, the upper corner box 30, the lower corner box 40 and the connection end plate 20 are each provided in two and symmetrically arranged, the connection plate 130 is arranged between the two connection end plates 20, and one end of the connection plate 130 is fixedly connected to one connection end plate 20, and the other end of the connection plate 130 is fixedly connected to the other connection end plate 20.

[0051] In this embodiment, since multiple box-type modules need to be spliced ​​together during module splicing, when the connection node involves the splicing of four box-type modules, such as a node located in the middle of a modular stacked building, two upper corner fitting boxes 30 are symmetrically arranged above the main gusset plate 10, with their axis of symmetry being the vertical centerline of the main gusset plate 10. Accordingly, two upper shear members 70 are also symmetrically arranged and connected to the two upper corner fitting boxes 30 in a one-to-one correspondence by cooperating with their respective upper pins 90 and upper opening reinforcement ring plates 110. Two lower corner fitting boxes 40 are symmetrically arranged below the main gusset plate 10, with their axis of symmetry being the vertical centerline of the main gusset plate 10. Accordingly, two lower shear members 80 are also symmetrically arranged and connected to the two lower corner fitting boxes 40 in a one-to-one correspondence by cooperating with their respective lower pins 100 and lower opening reinforcement ring plates 120.

[0052] One connecting end plate 20 connects an upper corner box 30 and a lower corner box 40, while the other connecting end plate 20 connects another upper corner box 30 and another lower corner box 40. The two connecting end plates 20 are arranged parallel and symmetrically, with the axis of symmetry being the vertical centerline of the main gusset plate 10. A connecting plate 130 is arranged perpendicular to the two connecting end plates 20, with its outer end surface flush with the outer end surfaces of the two connecting end plates 20. The ends of the connecting plate 130 are welded to the two connecting end plates 20, thereby connecting the four box-type modules on the left and right sides. This further constrains the two box-type modules on the left and right sides (the left and right sides can be understood as the left and right sides of the vertical centerline of the main gusset plate 10) to prevent relative displacement and enhance the stability of the connecting nodes. In this embodiment, the connecting plates 130 also constitute the first level of seismic fortification. Multiple connecting nodes are formed when multiple modules are assembled, further enhancing the integrity of the entire modular stacked box building.

[0053] Understandably, if Figure 10 As shown, in another embodiment, when modules are spliced, the connection nodes also involve the splicing of one box-type module above and one below, such as nodes at the edge of a modular stacked container building. In this embodiment, the connection nodes do not include the connection plate 130. The entire modular stacked container building may include connection nodes connecting four box-type modules or connection nodes connecting two box-type modules.

[0054] In a further embodiment, an auxiliary mounting hole 101 may be provided on the main node plate 10, and the box-type module may also include a concrete floor. A reserved hole for the auxiliary mounting hole 101 is provided on the bottom concrete floor of the upper box-type module. The auxiliary mounting hole 101 and the reserved hole for the auxiliary mounting hole 101 are arranged relative to each other. When the box-type module and the main node plate 10 are assembled, the bottom concrete floor of the upper box-type module is located above the main node plate 10, and a corresponding auxiliary connecting component may be arranged in the auxiliary mounting hole 101 to further improve the integrity of the node area.

[0055] The defects in the prior art are: Figure 1 The solution shown in the figure connects the upper and lower modules by installing multiple bolts at the top and bottom plates of the upper and lower modules. The overall strength of the node is poor; there is insufficient operating space at the local position of the node plate connection; and the assembly rate is low. Figure 2 The solution shown uses a combination of bolts and grouting to connect the upper and lower modules. The simultaneous use of bolt connection and grouting results in a relatively high cost for the joints. The connection strength between the upper and lower columns is insufficient, lacking effective pull-out resistance measures. Figure 3The solution shown uses four bolts in the corner box to connect the upper and lower modules. The four bolts are difficult to install and require special installation tools. The side openings of the corner box are large, which has a certain impact on the strength of the column base. Figure 4 The solution shown in the figure adds anti-pullout and anti-shear parts with limit plates on the basis of the grouting method, utilizing the shear strength of the triangular limit plates and the bonding strength provided by the high-strength grouting material. However, the self-positioning grouting node is complicated to process. The anti-shear parts with limit plates occupy most of the volume in the corner box, and the bond strength provided by the concrete grouting material is insufficient. Moreover, with the increase of service life and the long-term influence of horizontal wind loads, the overall bearing capacity of the node will continue to decrease. There is no connection between the upper and lower column wall panels, and they are only connected by the built-in anti-pullout and anti-shear parts. The bending stiffness of the node is greatly weakened. Once the concrete strength deteriorates, the constraint capacity of the entire node will deteriorate sharply, resulting in a significant decrease in the stress performance of the overall structure and the inability to achieve a detachable process.

[0056] The connection nodes of the modular stacked container building provided by the embodiment of the present invention are improved compared with the prior art in that: Relative to Figure 1 The semi-rigid connection scheme using bolts shown in the embodiment of the present invention provides two-level seismic fortification in the connection nodes of the modular stacked box building, which makes the overall performance strength of the node higher and the inter-story displacement smaller; Relative to Figure 2 The connection nodes of the modular stacked box building provided by the embodiment of the present invention, which use a bolted and grouting connection scheme, adopt a dry process, which can effectively improve the durability of the steel structure in the node area. In addition, by providing two layers of seismic protection, the connection strength and pull-out resistance between the upper and lower columns are improved. Relative to Figure 3 The semi-rigid connection scheme using bolts is shown. In the modular stacked box building provided by the embodiment of the present invention, only mounting holes for the pins are provided on the corner box of the connection node. The opening is smaller, which has less impact on the strength of the column base and improves the building's comfort performance under horizontal forces. Relative to Figure 4 The connection scheme shown, which combines grouting and shear members, relies solely on a small amount of concrete in the joint area to hold the shear members. The shear members with stoppers occupy most of the volume within the corner box, and the concrete grouting provides insufficient holding force. Furthermore, with age and the long-term effects of horizontal wind loads, the overall bearing capacity of the joint will continue to decrease. The two-stage seismic fortification of the connection nodes of the modular stacked box building provided by this embodiment of the present invention uses a dry process, which effectively improves the durability of the steel structure in the joint area. and, Figure 4The solution shown lacks a reliable ductile connection between the upper and lower corner boxes. Once the concrete strength deteriorates, the restraining capacity of the entire joint deteriorates dramatically, leading to a significant decrease in the overall structural load-bearing performance. However, the connection nodes of the modular stacked box building provided by this embodiment directly connect the upper and lower corner boxes through a primary seismic fortification, effectively improving the structural integrity.

[0057] Furthermore, Figure 4 In the solution shown, the left and right boxes are connected only by horizontal steel plates, resulting in poor out-of-plane bending stiffness and making it impossible to achieve disassembly. However, the connection nodes of the modular stacked box building provided by the embodiment of the present invention can further increase the out-of-plane connection between the left and right boxes through the first level of seismic protection. Moreover, only the U-shaped end plate and the pin shaft on the bracket need to be mechanically removed to achieve complete lossless separation of the module box, which is beneficial to the upgrading and renovation of modular buildings and the recycling after demolition, and has strong promotion value.

[0058] To sum up, the connection nodes of the modular stacked box buildings provided by the embodiments of the present invention greatly enhance the shear, pull-out, bending bearing capacity and seismic ductility of the node area through its unique two-line seismic fortification structure, and at the same time can effectively play the role of seismic energy dissipation in the node area, improve the seismic design performance of the overall structure, and are easy to disassemble, which is conducive to the upgrading and renovation of modular buildings and the recycling after demolition. It has strong promotion value and is suitable for high-rise reinforced stacked box steel frame systems, high-rise reinforced stacked box shear wall systems, multi-layer stacked box systems, etc., and can be widely used in residential, apartment, office, school, hospital and other buildings.

[0059] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A connection node for a modular stacked box building, comprising an upper corner box and a lower corner box, wherein the top of the upper corner box is fixedly connected to the bottom of an upper column, and the bottom of the lower corner box is fixedly connected to the top of a lower column, characterized in that: The connection node further comprises a main node plate, a connection end plate, an upper shear member, a lower shear member, an upper pin shaft and a lower pin shaft; The upper corner fitting box is arranged above the main gusset plate, and the lower corner fitting box is arranged below the main gusset plate. An upper corbel is welded to the outer side of the upper corner fitting box, and a lower corbel is welded to the outer side of the lower corner fitting box. The connecting end plate is welded to the upper corbel and the lower corbel to connect the upper corner fitting box and the lower corner fitting box. The upper shear member is fixed on the upper end surface of the main node plate and is located in the upper corner piece box, and the upper pin connects the upper shear member and the upper corner piece box; the lower shear member is fixed on the lower end surface of the main node plate and is located in the lower corner piece box, and the lower pin connects the lower shear member and the lower corner piece box.

2. The connection node of the modular stacked container building according to claim 1, characterized in that: The upper corbel and the lower corbel are both hollow; one end of the upper pin shaft is located in the space inside the upper corbel, and one end of the lower pin shaft is located in the space inside the lower corbel. The connecting end plate connects the upper corner box and the lower corner box while also closing the space inside the upper corbel and the lower corbel.

3. The connection node of the modular stacked container building according to claim 2, characterized in that: The upper corbel and the lower corbel both include two mutually parallel transverse plates and two mutually parallel vertical plates. One end of the transverse plate and the vertical plate of the upper corbel is welded to the outer side surface of the upper corner piece box, and one end of the transverse plate and the vertical plate of the lower corbel is welded to the outer side surface of the lower corner piece box; the two transverse plates and the two vertical plates of the upper corbel are connected end to end to form a hollow setting of the upper corbel, and the two transverse plates and the two vertical plates of the lower corbel are connected end to end to form a hollow setting of the lower corbel.

4. The connection node of the modular stacked container building according to claim 3, characterized in that: The connecting end plate is a U-shaped end plate, which includes vertical side plates and a top plate and a bottom plate respectively connected to the top and lower ends of the side plates. Before the U-shaped end plate is welded to the upper corbel and the lower corbel, the top plate of the U-shaped end plate cooperates with the transverse plate of the upper corbel away from the lower corbel, and the bottom plate of the U-shaped end plate cooperates with the transverse plate of the lower corbel away from the upper corbel, so that the U-shaped end plate is clamped on the upper corbel and the lower corbel.

5. The connection node of the modular stacked container building according to claim 1, characterized in that: The upper corner piece box includes an upper X-direction inward protrusion and an upper Y-direction inward protrusion; the upper X-direction inward protrusion is formed by extending from the bottom end of the first side wall of the upper corner piece box to the second side wall, the first side wall and the second side wall of the upper corner piece box are arranged opposite to each other, and the distance between the end of the upper X-direction inward protrusion and the second side wall of the upper corner piece box is adapted to the width of the upper shear member; the upper Y-direction inward protrusion is formed by extending from the bottom end of the third side wall and the bottom end of the fourth side wall of the upper corner piece box toward each other, the bottom end of the third side wall and the fourth side wall of the upper corner piece box are arranged opposite to each other, and the distance between the two ends of the upper Y-direction inward protrusion is adapted to the length of the upper shear member.

6. The connection node of the modular stacked container building according to claim 5, characterized in that: The lower corner piece box includes a lower X-direction inward protrusion and a lower Y-direction inward protrusion; the lower X-direction inward protrusion is formed by extending from the top end of the first side wall of the lower corner piece box to the second side wall, the first side wall and the second side wall of the lower corner piece box are arranged opposite to each other, and the distance between the end of the lower X-direction inward protrusion and the second side wall of the lower corner piece box is adapted to the width of the lower shear member; the lower Y-direction inward protrusion is formed by extending from the top end of the third side wall and the top end of the fourth side wall of the lower corner piece box towards each other, the bottom end of the third side wall of the lower corner piece box is arranged opposite to the fourth side wall, and the distance between the two ends of the lower Y-direction inward protrusion is adapted to the length of the lower shear member.

7. The connection node of the modular stacked container building according to claim 1, characterized in that: An upper mounting socket cooperating with the upper pin is provided on the side wall of the upper corner piece box, and an upper hole reinforcement ring plate coaxially arranged with the upper mounting socket is also welded to the side wall of the upper corner piece box; A lower mounting socket cooperating with the lower pin shaft is provided on the side wall of the lower corner piece box, and a lower hole reinforcement ring plate coaxially arranged with the lower mounting socket is also welded on the side wall of the lower corner piece box.

8. The connection node of the modular stacked container building according to claim 1, characterized in that: The axis of the upper pin is parallel to the long side of the upper corner piece box; the axis of the lower pin is parallel to the long side of the lower corner piece box.

9. The connection node of the modular stacked container building according to claim 1, characterized in that: The main beam of the upper box-type module is fixedly connected to one outer side of the upper corner box, the outer side of the upper corner box to which the upper corbel is welded is arranged opposite to the outer side of the main beam connected to the upper box-type module, and the upper pin shaft is staggered with the main beam of the upper box-type module; The main beam of the lower box-type module is fixedly connected to an outer side surface of the lower corner fitting box, the outer side surface of the lower corner fitting box to which the lower corbel is welded is arranged opposite to the outer side surface of the main beam connected to the lower box-type module, and the lower pin shaft is staggered with the main beam of the lower box-type module.

10. The connection node of the modular stacked container building according to any one of claims 1 to 9, characterized in that: It also includes a connecting plate, the upper corner box, the lower corner box and the connecting end plate are each provided in two and symmetrically arranged, the connecting plate is arranged between the two connecting end plates, and one end of the connecting plate is fixedly connected to one connecting end plate, and the other end of the connecting plate is fixedly connected to the other connecting end plate.

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