Connecting structure of prefabricated steel plate shear-resistant column base
By using a prefabricated column body, column base plate, and anchor bolt connection structure, and utilizing high-strength bent anchor bolts and UHPC, the problem of slippage of steel structure column base due to horizontal shear force was solved, achieving a stable connection between the column base and the foundation, and improving the construction efficiency and safety of prefabricated buildings.
Patent Information
- Application Number
- CN202423018419.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-12-09
AI Technical Summary
In steel structure column bases, the horizontal shear force causes the column base plate to slip relative to the foundation top surface, which is difficult to effectively solve with traditional methods.
The structure employs a connection of precast column body, precast column base plate and anchor bolts. The connection between the column base and the foundation is enhanced by the combined action of high-strength bent anchor bolts and UHPC. The design of shear keys and anchor bolts limits the displacement and overturning of the column base.
It effectively prevents column base slippage and overturning due to horizontal shear force, improves structural stability and safety, enhances construction efficiency, and is suitable for prefabricated buildings.
Smart Images
Figure CN223468876U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of building structure, specifically relates to a connecting structure of prefabricated steel plate shear column foot. BACKGROUND
[0002] In the steel structure column foot, because the horizontal shear force exists in the column foot bottom, when the static friction force of the column foot bottom plate and the foundation top surface is less than the horizontal shear force, the horizontal shear force will cause the column foot bottom plate to slip relative to the foundation top surface, and the traditional solution is to set the shear key on the column foot, that is, the thicker channel steel or I-beam is vertically welded on the horizontal steel plate of the column foot bottom plate to resist the horizontal shear force, thereby preventing the column foot bottom plate from slipping relative to the foundation top surface. However, in the face of complex and variable real situation, the traditional solution is often difficult to solve.
[0003] Compared with the long construction period, serious environmental pollution and shortage of construction personnel of the traditional building construction, the prefabricated component factory production and on-site splicing construction method of the fabricated building has many advantages such as shortening the construction period, improving the construction efficiency and reducing the building cost, and is more and more widely applied in the building industry. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at solving the problem that the horizontal shear force will cause the column foot bottom plate to slip relative to the foundation top surface.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: including outer cast concrete shell, prefabricated column body, prefabricated column foot plate, prefabricated column foot and foundation anchor bolt, the prefabricated column body is welded to the prefabricated column foot through the prefabricated column foot plate, the prefabricated column body is the back-shaped tubular structure, the prefabricated column foot plate includes upper back-shaped end plate and lower back-shaped end plate, the upper back-shaped end plate and the lower back-shaped end plate are arranged in parallel and are connected through a plurality of supporting stiffening rib plates, the lower end of the prefabricated column body is connected with the upper back-shaped end plate, the lower back-shaped end plate is connected to the prefabricated column foot, the prefabricated column foot is the table-shaped structure and the upper surface area of the table-shaped structure is greater than the lower surface area, the foundation anchor bolt is the columnar structure with the lower end bending, is arranged at the edge of the prefabricated column foot plate and passes through the prefabricated column foot plate, the outer cast concrete shell covers the prefabricated column foot plate and the prefabricated column foot and is fixed through the positioning nut on the upper back-shaped end plate, the connecting structure enhances the ability of the foundation anchor bolt to firmly connect the column foot and the foundation, and avoids the displacement and overturning of the column foot due to the horizontal shear force.
[0006] Preferably, the prefabricated column body includes square tubular plate steel inner shell, upper end plate and tensioning screw rod, the upper end plate is embedded with the tensioning screw rod.
[0007] Preferably, the prefabricated column foot plate is an integral structure, and the plurality of supporting stiffening ribs are symmetrically arranged about the center of the prefabricated column foot plate.
[0008] Preferably, the prefabricated column foot comprises a steel plate inner shell in the form of a table, and a plurality of shear key lugs are welded to the outer surface of the steel plate inner shell.
[0009] Preferably, the plurality of shear key lugs are uniformly distributed on the outer surface of the steel plate inner shell.
[0010] Preferably, the anchor bolt of the column foot comprises a carbon structural steel, a positioning nut and a leveling pad, the lower end of the carbon structural steel is processed into a bent anchor bolt, the carbon structural steel passes through the positioning nut and the leveling pad and positions the prefabricated column foot plate through the positioning nut and the leveling pad.
[0011] The utility model has the advantages that the utility model provides a new form prefabricated steel plate-UHPC (Ultra-High Performance Concrete, UHPC) shear column foot connecting structure, one of the prominent features of which is that the whole ground bolt adopts a high-strength bent anchor bolt, which enhances the ability of the column foot anchor bolt to firmly connect the column foot and the foundation, ensures that the column foot does not displace and overturn due to horizontal shear force, and thus guarantees the stability and safety of the equipment.
[0012] Secondly, the lower steel plate inner shell of the prefabricated column foot and the UHPC jointly act, which can enhance the friction force between the column foot and the foundation, effectively improve the ability of the column foot to resist the shear force at the column bottom, effectively disperse and absorb the shear force at the column bottom, prevent the structure from being damaged due to excessive shear force at the column bottom, and limit the displacement of the column foot in four directions through the structural design of the shear key and the firm welding of the shear key to the foundation, which helps to maintain the overall stability and precision of the structure.
[0013] Thirdly, the prefabricated column foot is welded with corresponding annular rings, which can further improve the ability of the column foot to resist the shear force at the column bottom, and the annular rings are convenient for further binding the stirrups to improve the construction efficiency.
[0014] Fourthly, the positioning nut and the fastening nut are used as tools for connecting the prefabricated column foot plate and the prefabricated column body, which improves the construction efficiency.
[0015] Fifthly, the UHPC high-strength concrete is used for pouring, which improves the mechanical properties of the column foot.
[0016] The utility model improves the applicability of the prefabricated shear column foot connecting structure in the fabricated building and solves the problem that the horizontal shear force will cause the column foot plate to slide relative to the top surface of the foundation. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation to the scope. For the first skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0018] Figure 1 is a factory prefabrication stage perspective view of the prefabricated column body of the present application;
[0019] Figure 2 is a factory prefabrication stage perspective view of the prefabricated column foot plate of the present application;
[0020] Figure 3 is a single structure schematic view of the prefabricated column foot steel plate inner shell of the present application;
[0021] Figure 4 is a single structure schematic view of the anchor bolt of the present application;
[0022] Figure 5 is a prefabricated shear column foot connecting structure construction perspective view of the present application.
[0023] Figure 6 is a pouring UHPC novel prefabricated shear column foot connecting structure construction perspective view of the present application. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the first skilled in the art without creative labor are within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by the first skilled in the art without creative labor are within the scope of protection of the present application.
[0025] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0026] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0027] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For the first person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0028] In the utility model, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and oblique upward of the first feature above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and oblique downward of the first feature below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0029] Embodiment
[0030] The following is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the following examples. Any technical solution falling within the scope of the utility model is within the protection scope of the utility model.
[0031] Reference drawings Figures 1-5The application discloses a new type of prefabricated steel plate-UHPC (Ultra-High Performance Concrete) shear column foot connecting structure, which comprises an outer cast UHPC shell 21, a prefabricated column body 1, a prefabricated column foot plate 2, a prefabricated column foot 3 and a ground anchor bolt 4. Figure 2 The prefabricated column foot plate 2 is composed of an upper back-shaped end plate 23, a lower back-shaped end plate 24 and a supporting stiffened rib plate 25, the supporting stiffened rib plate 25 is welded to the upper surface of the lower back-shaped end plate 24 and the lower surface of the upper back-shaped end plate 23; it is worth noting that the upper and lower back-shaped end plates are provided with holes, the ground anchor bolt 4 passes through the first perforation and the second perforation of the upper and lower back-shaped end plates in sequence, the number of the first perforation and the second perforation matches the number of the ground anchor bolt, and the position of each perforation corresponds to the position of the corresponding ground anchor bolt. Figures 5-6 The prefabricated column foot 3 comprises a ladder-shaped steel plate inner shell 31 with a wide upper part and a narrow lower part and a shear key 32.
[0032] One end of the ground anchor bolt 4 passes through the second perforation and the first perforation reserved in the prefabricated column foot plate 2 and is fixed by a positioning nut 42 and a leveling pad 43, and the other end is anchored to a building structure and is bent towards the center of the back-shaped column foot steel plate.
[0033] The construction method of the application comprises the following two stages:
[0034] The factory prefabrication stage:
[0035] The prefabricated column body 1:
[0036] Firstly, according to the design calculation requirements of the column section, a suitable steel plate 12 is selected and processed into a rectangle (the suitable steel plate size refers to the steel plate size meeting the requirements of the section steel ratio, i.e. the economy and the stress requirement). Secondly, the upper end plate 13 is welded.
[0037] The prefabricated column foot 2:
[0038] Firstly, according to the design calculation requirements of the column section, a suitable steel plate 31 is selected and processed into a tetrahedron with a wide upper part and a narrow lower part as the column foot steel plate inner shell 31 (the suitable steel plate size refers to the steel plate size meeting the requirements of the section steel ratio, i.e. the economy and the stress requirement). Then, the shear key ring 32 is welded to the outer surface of the steel plate inner shell 31.
[0039] Secondly, according to the column foot section design calculation requirements, the appropriate steel plate size is selected to process into the back-shaped end plate (the appropriate steel plate size refers to the steel plate size meeting the section steel ratio, i.e. the economy and the stress requirement); then, the first hole is arranged on the upper back-shaped end plate 23 at the appropriate interval (the appropriate interval refers to the setting of the anchor bolt meeting the stability and the expected load requirement of the steel plate structure in the prefabrication stage); the second hole is arranged on the lower back-shaped end plate 24 at the appropriate interval (the appropriate interval refers to the setting of the anchor bolt meeting the stability and the expected load requirement of the steel plate structure in the prefabrication stage); the supporting stiffening rib plate 25 is welded to the lower surface of the upper back-shaped end plate 23 and the upper surface of the lower back-shaped end plate 24 at the appropriate interval (the appropriate interval refers to the setting of the anchor bolt supporting stiffening rib plate meeting the stability requirement of the steel plate structure in the prefabrication stage); and the steel plate inner shell 31 of the column foot is welded with the prefabricated column foot plate 2, so as to complete the prefabrication of the column foot. Then, the factory prefabrication of the anchor bolt 4 is carried out, the appropriate carbon structural steel 41 is selected to process into the bent anchor bolt 44 according to the technical design specification of the anchor bolt (the appropriate carbon structural steel meets the minimum tensile load performance of the design), and finally the anchor bolt is heat treated to ensure the mechanical property.
[0040] After that, the prefabricated column body 1 is welded with the prefabricated column foot 3, so as to complete the factory prefabrication stage.
[0041] On-site construction stage:
[0042] The foundation pit is excavated, the anchor bolt 4 is embedded, one positioning nut 42 is sleeved on each anchor bolt 4, and two leveling pads 43 are sleeved; then, the prefabricated component is transported to the site and assembled and connected with the embedded anchor bolt, then the UHPC 21 concrete is poured to the positioning nut 42; finally, the UHPC is used as the internal core concrete of the steel plate for secondary pouring, and the on-site construction is completed.
[0043] The above embodiment is only for illustrating the technical concept and characteristics of the utility model, the purpose is to enable the person skilled in the art to understand the content of the utility model and to implement it, and it cannot limit the protection scope of the utility model. Any equivalent change or modification according to the spirit and essence of the utility model shall be covered within the protection scope of the utility model.
Claims
1. A connection structure of a precast steel plate shear column footing, characterized by, The precast column body is welded to the precast column foot through the precast column foot plate, the precast column body is a Huazi-shaped tubular structure, the precast column foot plate comprises an upper Huazi-shaped end plate and a lower Huazi-shaped end plate, the upper Huazi-shaped end plate and the lower Huazi-shaped end plate are arranged in parallel and are connected through a plurality of supporting stiffening rib plates, the lower end of the precast column body is connected to the upper Huazi-shaped end plate, the lower Huazi-shaped end plate is connected to the precast column foot, the precast column foot is a table-shaped structure, and the upper surface area of the table-shaped structure is greater than the lower surface area, the foundation anchor bolt is a columnar structure with a bent lower end, is arranged at the edge of the precast column foot plate and penetrates through the precast column foot plate, the outer cast concrete shell covers the precast column foot plate and the precast column foot and is fixed through positioning nuts on the upper Huazi-shaped end plate, the connecting structure enhances the ability of the foundation anchor bolt to firmly connect the column foot and the foundation, and displacement and overturning of the column foot due to horizontal shear force are avoided.
2. The connection structure of a precast steel plate shear column footing according to claim 1, characterized in that, The precast column body comprises a square tubular plate steel inner shell, an upper end plate and a tensioning screw rod, and the upper end plate is embedded with the tensioning screw rod.
3. The connection structure of a precast steel plate shear column footing according to claim 1, wherein, The precast column foot plate is an integral structure, and the plurality of supporting stiffening rib plates are symmetrically arranged about the center of the precast column foot plate.
4. The connection structure of a precast steel plate shear column footing according to claim 1, wherein, The precast column foot comprises a table-shaped steel plate inner shell, and a plurality of shear key eyelets are welded to the outer surface of the steel plate inner shell.
5. The connection structure of a precast steel plate shear column footing according to claim 4, wherein, The plurality of shear key eyelets are uniformly distributed on the outer surface of the steel plate inner shell.
6. The connection structure of a precast steel plate shear wall column base according to claim 1, wherein The foundation anchor bolt comprises a carbon structural steel, a positioning nut and a leveling pad, the lower end of the carbon structural steel is processed into a bent anchor bolt, the carbon structural steel penetrates through the positioning nut and the leveling pad and positions the precast column foot plate through the positioning nut and the leveling pad.