Steel structure column foot rigid joint node

Abstract

The utility model provides a kind of steel structure column foot rigid joint, comprising: steel column;Foundation beam;Horizontal steel bone, it is located in foundation beam, the lower end of steel column is inserted into foundation beam and is connected with horizontal steel bone;Pile cap, it is located below foundation beam and is connected with foundation beam;Multiple steel bone support, it is located between pile cap and horizontal steel bone, when construction, horizontal steel bone is supported on pile cap by steel bone support;Outer package concrete structure, the junction of steel column and foundation beam is covered by concrete and forms outer package concrete structure;Foundation beam and pile cap need to be poured concrete.The utility model can guarantee the premise that column foot node is safely and reliably connected, solve the problem that building appearance and use are influenced, steel column is buried in concrete foundation depth is big, simultaneously, solve the anticorrosion and rustproof problem of steel column buried in covering earth section, with the advantages of simple construction, low construction cost.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a rigid connection node for steel structure column base. Background Technology

[0002] Prefabricated modular buildings, with their advantages of factory processing, rapid on-site construction, and environmental friendliness, have been widely used in public and residential buildings. Steel structures, as a major structural form, also possess the characteristics of prefabrication, and their use in above-ground buildings has become one of the mainstream trends in domestic building structure development. While steel structures offer significant advantages for above-ground buildings, their use is limited by the damp and corrosive underground environment, necessitating the use of reinforced concrete foundations. This raises the question of how to connect steel columns to concrete foundations.

[0003] Above-ground steel structures bear vertical gravity loads, horizontal wind loads, and seismic loads, which are transferred to the foundation below through the columns. The safety and reliability of the steel column base joints are a prerequisite for ensuring the safety of the superstructure. Simultaneously, when the steel column connects to the concrete foundation, due to the soil cover above the foundation surface, which has a high moisture content, the bottom of the steel column will be in contact with the damp soil for a prolonged period. Therefore, technical measures are needed to protect the steel column from corrosion and rust, typically by encasing the steel column in concrete. However, existing encased rigid column base joints require a large concrete encasing height and width to ensure load-bearing capacity, resulting in the concrete layer protruding significantly from the finished building surface, severely impacting the building's appearance and usability. Furthermore, to ensure load-bearing capacity, the steel column needs to be embedded a considerable depth into the reinforced concrete foundation; regulations require an embedment depth of at least 1.5 times the long side dimension of the steel column cross-section. This leads to problems such as a large concrete foundation height, a deep foundation pit excavation, increased difficulty in deep foundation pit support, longer construction period, and increased foundation pit support costs.

[0004] Therefore, how to ensure the safe and reliable connection of column base nodes, without affecting the building's appearance and use, while reducing the depth of the steel columns embedded in the concrete foundation, thereby reducing the height of the concrete foundation, lowering the excavation depth and support difficulty, and saving construction time and support costs, has become an urgent problem to be solved. Utility Model Content

[0005] The purpose of this utility model is to provide a rigid connection node for steel structure column bases, which can solve the problems of affecting the building's appearance and use, and the large depth of steel columns embedded in the concrete foundation, while ensuring the safe and reliable connection of the column base nodes. At the same time, it solves the problem of corrosion and rust prevention in the section of the steel column embedded in the soil. It has the advantages of simple construction and low construction cost.

[0006] To achieve the above objectives, this utility model provides a rigid connection node for steel structure column bases, comprising:

[0007] steel columns;

[0008] Foundation beam;

[0009] A horizontal steel frame is located in the foundation beam, and the lower end of the steel column is inserted into the foundation beam and connected to the horizontal steel frame;

[0010] A foundation cap, which is located below the foundation beam and connected to the foundation beam;

[0011] Multiple steel frame supports are located between the pier and the horizontal steel frame. During construction, the horizontal steel frame is supported on the pier by the steel frame supports.

[0012] An external concrete structure is formed by covering the junction of the steel column and the foundation beam with concrete.

[0013] Both the foundation beam and the pier cap need to be poured with concrete.

[0014] Optionally, the outer concrete structure includes multiple outer concrete longitudinal bars and multiple outer concrete stirrups. The outer concrete longitudinal bars extend sequentially from the outer concrete structure to the foundation beam and the pile cap. The multiple outer concrete stirrups are distributed at intervals along the outer concrete longitudinal bars and are fixed around all the outer concrete longitudinal bars.

[0015] Optionally, the outer concrete structure includes multiple outer concrete tie bars, each end of which is connected to an intersection of an outer concrete stirrup and an outer concrete longitudinal reinforcement bar.

[0016] Optionally, the steel frame has multiple legs, and the top surface of the support platform is provided with corresponding blind holes for the legs to be inserted.

[0017] Optionally, the steel frame includes a support plate and a connecting part, the support plate is located on the top surface of the platform, and the support plate is connected to the horizontal steel frame through the connecting part.

[0018] Optionally, the bearing platform includes a first reinforcing mesh for bearing pressure, the first reinforcing mesh being disposed on the top surface of the bearing platform.

[0019] Optionally, the horizontal steel frame is a structural steel section, and the horizontal steel frame is provided with multiple stiffening ribs.

[0020] Optionally, the foundation beam includes multiple reinforcing bars, and the steel column is connected to the reinforcing bars of the foundation beam via a reinforcing bar connector.

[0021] Optionally, the multiple reinforcing bars of the foundation beam include multiple U-shaped stirrups, which extend from the foundation beam into the foundation cap to connect the foundation beam and the foundation cap.

[0022] Optionally, the multiple reinforcing bars of the foundation beam include multiple top bars, multiple bottom bars, and multiple web bars. The top bars are located at the top of the foundation beam, the bottom bars are located at the bottom of the foundation beam, and the multiple web bars are distributed at intervals between the top bars and the bottom bars. At least some of the top bars are connected to the U-shaped stirrups, at least some of the bottom bars are connected to the U-shaped stirrups, and at least some of the web bars are connected to the U-shaped stirrups.

[0023] As described above, by setting horizontal steel reinforcement in the foundation beam and connecting the steel column to the horizontal steel reinforcement, the connection strength of the steel column base is improved, ensuring stress resistance. This allows for a reduction in the depth of the steel column embedded in the concrete foundation and a decrease in the height of the concrete foundation. Simultaneously, the horizontal steel reinforcement ensures stress resistance, allowing for a reduction in the height and width of the outer concrete structure. Multiple steel reinforcement supports allow the horizontal steel reinforcement to be supported on the foundation platform during construction. Compared to other temporary fixing measures for horizontal steel reinforcement, using steel reinforcement supports simplifies the construction process and reduces construction costs. In summary, this utility model's rigid connection node for steel column bases can solve the problems of affecting building appearance and use, and the large depth of steel column embedment in the concrete foundation, while ensuring a safe and reliable connection of the column base node. It reduces the height of the concrete foundation, lowers the excavation depth and support difficulty, saves construction time and support costs, and solves the problem of corrosion and rust prevention in the section of the steel column embedded in the soil. It has the advantages of simple construction and low construction cost. Attached Figure Description

[0024] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention. Wherein:

[0025] Figure 1 This is a schematic diagram of a rigid connection node of a steel structure column base according to an embodiment of the present utility model;

[0026] Figure 2 for Figure 1 Top view;

[0027] Figure 3 for Figure 2 Cross-sectional view at point B;

[0028] Figure 4 This is a schematic diagram of the steel frame support for the rigid connection node of the steel structure column base according to an embodiment of the present utility model.

[0029] Figure 5 This is a schematic diagram of the connection between the steel column and the horizontal steel frame at the rigid joint of the steel column base in an embodiment of the present invention.

[0030] Figure 6 for Figure 1 Cross-sectional view at point A.

[0031] The reference numerals in the attached figures are as follows:

[0032] 1-Steel column; 2-Horizontal steel frame; 21-Upper flange; 22-Lower flange; 23-Web plate; 2a-Stiffening rib; 3-Stud; 4-Foundation beam; 4a-Stirrup; 4b-Top reinforcement; 4c-Bottom reinforcement; 4d-U-shaped stirrup; 4e-Waist reinforcement; 5-Pile cap; 5b-First steel mesh; 5a-Second steel mesh; 6-External concrete structure; 6a-External concrete longitudinal reinforcement; 6b-External concrete stirrup; 6c-External concrete tie bar; 7-Horizontal stiffening plate; 71-Circular hole; 8-Reinforcement connector; 9-Pile; 30-Steel frame support; 30a-Connection; 30b-Support plate; 30c-Feet. Detailed Implementation

[0033] In this document, unless otherwise stated, the terms “upper,” “lower,” “left,” “right,” “inner,” “outer,” “front,” “back,” “top,” “bottom,” etc., are used to indicate orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a characteristic orientation and operation, and therefore should not be construed as a limitation of the present invention.

[0034] The specific embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0035] The preferred embodiments of this utility model are given below with reference to the accompanying drawings and described in detail.

[0036] Figure 1 This is a schematic diagram of a rigid connection node of a steel structure column base according to an embodiment of this utility model. Figure 2 yes Figure 1 A top view. Please refer to... Figure 1 and Figure 2 This utility model embodiment provides a steel structure column base rigid connection node, including a steel column 1, a foundation beam 4, a horizontal steel frame 2, a pile cap 5, multiple steel frame supports 30 and an outer concrete structure 6. Both the foundation beam 4 and the pile cap 5 need to be poured with concrete.

[0037] The horizontal steel frame 2 is located in the foundation beam 4. The lower end of the steel column 1 is inserted into the foundation beam 4 and connected to the horizontal steel frame 2. For example, the four sides of the lower end of the steel column 1 are connected to the horizontal steel frame 2 by welding.

[0038] The foundation 5 is located below the foundation beam 4 and is connected to the foundation beam 4.

[0039] For further details, please refer to... Figure 1 and Figure 3 The foundation beam 4 includes multiple reinforcing bars. The steel column 1 is connected to the reinforcing bars of the foundation beam 4 via reinforcing bar connectors 8, for example, by welding the reinforcing bar connectors 8 to the column wall of the steel column 1. The multiple reinforcing bars of the foundation beam 4 include multiple U-shaped stirrups 4d, which extend from the foundation beam 4 into the foundation cap 5 to connect the foundation beam 4 and the foundation cap 5. The multiple reinforcing bars of the foundation beam 4 include multiple top reinforcing bars 4b, multiple bottom reinforcing bars 4c, and multiple web reinforcing bars 4e. The top reinforcing bars 4b are located at the top of the foundation beam 4, the bottom reinforcing bars 4c are located at the bottom of the foundation beam 4, and the web reinforcing bars 4e are spaced apart between the top reinforcing bars 4b and the bottom reinforcing bars 4c. At least some of the top reinforcing bars 4b are connected to the U-shaped stirrups 4d, at least some of the bottom reinforcing bars 4c are connected to the U-shaped stirrups 4d, and at least some of the web reinforcing bars 4e are connected to the U-shaped stirrups 4d. Figure 1 As shown, the top reinforcement 4b is connected to the column wall of the steel column 1 via the reinforcement connector 8. When there is no foundation cap 5 below the foundation beam 4, from... Figure 1 As can be seen, multiple stirrups 4a are spaced apart below the foundation beam 4 where there is no pile cap 5, to enhance resistance to deformation. Specifically, the bottom reinforcement 4c is connected to the top reinforcement 4b via stirrups 4a. The stirrups 4a are arranged around the bottom reinforcement 4c and the top reinforcement 4b. The connection between the stirrups 4a and the top reinforcement 4b, and between the stirrups 4a and the bottom reinforcement 4c, can be achieved by bundling. The bottom reinforcement 4c passes under the horizontal steel frame 2 and is bent and anchored at the end reaching the foundation beam 4.

[0040] Multiple steel frame supports 30 are located between the foundation 5 and the horizontal steel frame 2. During construction, the horizontal steel frame 2 is supported on the foundation 5 by the steel frame supports 30. For further details, please refer to... Figure 1 , Figure 4 and Figure 5The steel frame 30 has multiple legs 30c. The top surface of the foundation 5 has corresponding blind holes for the legs 30c to insert into, i.e., blind holes are set in the concrete filling the foundation 5 to serve for positioning and temporary fixation. For example, the legs 30c can be straight anchor bars. The steel frame 30 includes a support plate 30b and a connecting part 30a. The support plate 30b is located on the top surface of the foundation 5 and is connected to the horizontal steel frame 2 via the connecting part 30a. Specifically, the support plate 30b can be an anchor plate, the connecting part 30a can be a structural steel section (such as a channel or H-shaped section), the connecting part 30a is located above the support plate 30b, and the legs 30c are located below and connected to the support plate 30b. The connecting part 30a and the support plate 30b can be connected together by welding, and the legs 30c and the support plate 30b can be connected together by T-shaped welding. It can be understood that the horizontal steel frame 2 is pressed against the top surface of the foundation 5 by the support plate 30b. In the prior art, the horizontal steel frame 2 itself is relatively heavy. Therefore, during the construction phase, the horizontal steel frame 2 faces problems such as difficulty in installation and fixing, complexity of temporary construction measures, and high construction costs. This utility model solves this problem by setting up the steel frame support 30.

[0041] The foundation 5 includes a first reinforcing mesh 5b for bearing pressure, which is disposed on the top surface of the foundation 5. For example, the first reinforcing mesh 5b includes several orthogonally spaced reinforcing bars to prevent localized bearing failure at the top of the foundation 5 that may be caused by the large unit area pressure of the steel frame 30. The foundation 5 also includes a second reinforcing mesh 5a, which is disposed at the bottom of the foundation 5.

[0042] The horizontal steel frame 2 is a structural steel section, preferably equipped with multiple stiffening ribs. For example, the horizontal steel frame 2 can be an H-beam, with equally spaced studs 3 on the upper surface of its upper flange 21, the lower surface of its lower flange 22, and both sides of its web 23. The studs 3 are welded to the H-beam, and the horizontal steel frame 2 works in conjunction with the foundation beam 4 via the studs 3. Please refer to [reference needed]. Figure 1 and Figure 5 Stiffening ribs 2a are provided on both sides of the cantilever end and half span of the horizontal steel frame 2 to prevent large vertical and horizontal deformations during installation and fixing. A steel frame support 30 is provided at each end of the lower flange 22 of the cantilever end of the horizontal steel frame 2. The steel frame support 30 is welded to the lower flange 22 of the horizontal steel frame 2 through the upper end of the connecting part 30a.

[0043] The junction between the steel column 1 and the foundation beam 4 is covered with concrete to form an outer concrete structure 6. The steel column 1 and the outer concrete structure 6 work together via studs 3. The foundation beam 4 and the outer concrete structure 6 are cast as a single unit using concrete. In other words, a portion of the steel column 1 protruding from the foundation beam 4 is covered with concrete, and the height of the outer concrete structure 6 is slightly greater than the thickness of the soil cover to provide waterproofing, corrosion protection, and rust prevention. Please refer to [reference needed]. Figure 1 and Figure 6 The outer concrete structure 6 includes multiple outer concrete longitudinal bars 6a and multiple outer concrete stirrups 6b. The outer concrete longitudinal bars 6a extend sequentially from the outer concrete structure 6 to the foundation beam 4 and the pile cap 5. The multiple outer concrete stirrups 6b are distributed at intervals along the outer concrete longitudinal bars 6a and are fixed around all the outer concrete longitudinal bars 6a. Preferably, as... Figure 1 As shown, the upper end of the outer concrete longitudinal reinforcement 6a is bent, and the lower end passes through the foundation beam 4 and extends into the foundation 5 until it reaches the upper surface of the second steel mesh 5a at the bottom of the foundation for bending and anchoring.

[0044] For a better option, please refer to the following. Figure 6 The outer concrete structure 6 includes multiple outer concrete tie bars 6c. Each end of an outer concrete tie bar 6c is connected to the intersection of an outer concrete stirrup 6b and an outer concrete longitudinal reinforcement 6a. That is, the outer concrete tie bars 6c, outer concrete stirrups 6b, and outer concrete longitudinal reinforcement 6a intersect and connect (e.g., through binding). The outer concrete longitudinal reinforcement 6a, outer concrete stirrups 6b, and outer concrete tie bars 6c form a spatial constraint system through binding, preventing displacement of the outer concrete longitudinal reinforcement 6a. It is understood that the outer concrete tie bars 6c penetrate the cross-section formed by the outer concrete stirrups 6b. In this embodiment, taking the steel column 1 as a square column as an example, the two ends of the outer concrete tie bars 6c are respectively connected to the two opposite sides of the outer concrete stirrups 6b.

[0045] Preferably, horizontal stiffening plates 7 are provided on the top surface of the steel column 1 encased in concrete structure 6, at positions corresponding to the upper and lower flanges of the horizontal steel frame 2, and at positions corresponding to the rebar connectors 8. When the cross-section of the steel column 1 is a closed cross-section, the horizontal stiffening plates 7 are provided with circular holes 71 for pouring concrete. Further, the rebar connectors 8 can be rebar splices or rebar connection plates, such as... Figure 5 As shown, Figure 5 The leftmost rebar connector 8 is a rebar connection plate. Figure 5 The rebar connector 8 on the right is a rebar splicer.

[0046] The steel structure column base rigid connection node also includes multiple piles 9, which are located below the pile cap 5 and are used to support the pile cap 5.

[0047] As described above, by setting horizontal steel reinforcement in the foundation beam and connecting the steel column to the horizontal steel reinforcement, the connection strength of the steel column base is improved, ensuring stress resistance. This allows for a reduction in the depth of the steel column embedded in the concrete foundation and a decrease in the height of the concrete foundation. Simultaneously, the horizontal steel reinforcement ensures stress resistance, allowing for a reduction in the height and width of the outer concrete structure. Multiple steel reinforcement supports allow the horizontal steel reinforcement to be supported on the foundation platform during construction. Compared to other temporary fixing measures for horizontal steel reinforcement, using steel reinforcement supports simplifies the construction process and reduces construction costs. In summary, this utility model's rigid connection node for steel column bases can solve the problems of affecting building appearance and use, and the large depth of steel column embedment in the concrete foundation, while ensuring a safe and reliable connection of the column base node. It reduces the height of the concrete foundation, lowers the excavation depth and support difficulty, saves construction time and support costs, and solves the problem of corrosion and rust prevention in the section of the steel column embedded in the soil. It has the advantages of simple construction and low construction cost.

[0048] The following construction sequence is adopted for this utility model: driving piles 9; binding the second steel mesh 5a at the bottom of the foundation 5 and the first steel mesh 5b for local bearing of the foundation 5; reserving the dowel bars for the U-shaped stirrups 4d and the dowel bars for the concrete-clad longitudinal reinforcement 6a of the foundation beam 4; pouring concrete for the foundation 5 and reaching 70% to 80% of the design strength, and drilling holes at the corresponding positions of the support feet 30c on the upper surface of the foundation 5; installing and fixing the steel column 1 and the horizontal steel skeleton 2 connected around its bottom to the foundation 5 through 8 steel skeleton supports 30; binding or welding the top reinforcement 4b, bottom reinforcement 4c, waist reinforcement 4e, U-shaped stirrups 4d, and stirrups 4a; binding or welding the concrete-clad longitudinal reinforcement 6a, concrete-clad stirrups 6b, and concrete-clad tie bars 6c; pouring concrete as a whole for the foundation beam 4 and the concrete-clad structure 6.

[0049] It should be noted that references to "an embodiment," "an embodiment," "a specific embodiment," "some embodiments," etc., in the specification only indicate that the described embodiment may include a specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Additionally, when a specific feature, structure, or characteristic is described in conjunction with an embodiment, whether explicitly described or not, implementing such a feature, structure, or characteristic in conjunction with other embodiments is within the knowledge of those skilled in the art.

[0050] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0051] It should also be noted that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the present invention without departing from the scope of the present invention, or equivalent embodiments can be modified based on the disclosed technical content. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention shall still fall within the protection scope of the present invention.

[0052] It should also be understood that, unless otherwise specified or indicated, the terms “first,” “second,” “third,” etc., in the specification are used only to distinguish the various components, elements, and steps in the specification, and not to indicate the logical or sequential relationships between the various components, elements, and steps.

[0053] Furthermore, it should be recognized that the terminology described herein is used only to describe particular embodiments and not to limit the scope of the invention. It must be noted that the singular forms “a” and “an” used herein and in the appended claims include plural bases unless the context clearly indicates otherwise. For example, a reference to “a step” or “an apparatus” means a reference to one or more steps or apparatuses, and may include secondary steps and secondary apparatuses. All conjunctions used should be understood in the broadest sense. Also, the word “or” should be understood to have the definition of logical “or” rather than logical “exclusive OR”, unless the context clearly indicates otherwise. Furthermore, implementation of the methods and / or devices in embodiments of the invention may include performing selected tasks manually, automatically, or in combination.

Claims

1. A steel structure column base rigid connection node, characterized in that, include: steel columns; Foundation beam; A horizontal steel frame is located in the foundation beam, and the lower end of the steel column is inserted into the foundation beam and connected to the horizontal steel frame; A foundation cap, which is located below the foundation beam and connected to the foundation beam; Multiple steel frame supports are located between the pier and the horizontal steel frame. During construction, the horizontal steel frame is supported on the pier by the steel frame supports. An external concrete structure is formed by covering the junction of the steel column and the foundation beam with concrete. Both the foundation beam and the pier cap need to be poured with concrete.

2. The steel column base rigid connection of claim 1, wherein The outer concrete structure includes multiple outer concrete longitudinal bars and multiple outer concrete stirrups. The outer concrete longitudinal bars extend sequentially from the outer concrete structure to the foundation beam and the pile cap. The multiple outer concrete stirrups are distributed at intervals along the outer concrete longitudinal bars and are fixed around all the outer concrete longitudinal bars.

3. The steel column base rigid connection of claim 2, wherein The outer concrete structure includes multiple outer concrete tie bars, each end of which is connected to the intersection of an outer concrete stirrup and an outer concrete longitudinal bar.

4. The steel column base rigid connection of claim 1, wherein The steel frame has multiple legs, and the top surface of the support platform is provided with corresponding blind holes for the legs to be inserted.

5. The steel structural column base rigid connection of claim 1, wherein The steel frame includes a support plate and a connecting part. The support plate is located on the top surface of the platform and is connected to the horizontal steel frame through the connecting part.

6. The steel structural column base rigid connection of claim 1, wherein The bearing platform includes a first steel mesh for bearing pressure, and the first steel mesh is disposed on the top surface of the bearing platform.

7. The steel structural column base rigid connection of claim 1, wherein The horizontal steel frame is a structural steel section, and the horizontal steel frame is provided with multiple stiffening ribs.

8. The steel column base rigid connection of claim 1, wherein The foundation beam includes multiple reinforcing bars, and the steel column is connected to the reinforcing bars of the foundation beam through a reinforcing bar connector.

9. The steel column base rigid connection of claim 8, wherein The foundation beam has multiple reinforcing bars, including multiple U-shaped stirrups, which extend from the foundation beam into the foundation cap to connect the foundation beam and the foundation cap.

10. The steel column base rigid connection of claim 9, wherein The foundation beam has multiple reinforcing bars, including multiple top bars, multiple bottom bars, and multiple web bars. The top bars are located at the top of the foundation beam, the bottom bars are located at the bottom of the foundation beam, and the web bars are distributed at intervals between the top bars and the bottom bars. At least some of the top bars are connected to the U-shaped stirrups, at least some of the bottom bars are connected to the U-shaped stirrups, and at least some of the web bars are connected to the U-shaped stirrups.

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