A type of embedded column base anchorage node for steel structures that extends into the basement without spanning the entire floor.

Abstract

This utility model belongs to the field of building structure technology, specifically steel structure column base anchoring technology, and relates to a steel structure embedded column base anchoring node that does not extend into the basement in a continuous layer. The aim is to provide a steel structure embedded column base anchoring node that reduces waste and lowers construction difficulty. The technical solution is a steel structure embedded column base anchoring node that does not extend into the basement in a continuous layer, characterized by: including a steel structure column; the steel structure column includes a column body located above the basement roof slab and a column base embedded in the basement concrete column and fixed to the basement roof slab; the embedment depth of the column base is less than the floor height of the basement connected to the basement roof slab.

Description

Technical Field

[0001] This utility model belongs to the field of building structure technology, especially steel structure column foot anchorage technology, specifically involving a steel structure embedded column foot anchorage node that does not extend into the basement on an entire floor. Background Technology

[0002] Steel structures possess advantages such as high load-bearing capacity, small cross-sectional dimensions, and strong toughness, ductility, deformation resistance, and energy dissipation capacity, making them widely used in super high-rise and large-span buildings. Column base joints are a key factor determining the load-bearing capacity of steel structures. Currently, in the design of steel structures for industrial and civil buildings both domestically and internationally, the main column base types include exposed column bases, enclosed column bases, embedded column bases, and inserted column bases. Among these, embedded column bases are the preferred type for multi-story and high-rise building structures due to their high stiffness and load-bearing capacity, and relevant Chinese standards also recommend their use.

[0003] According to the current "Code for Design of Composite Structures" and other relevant codes in my country, when there is one basement level, the steel columns should extend to the foundation slab and use embedded column bases; when there are two or more basement levels, the steel columns may extend only to the foundation slab and use non-embedded column bases. In other words, when there is a basement, all steel columns should extend to the foundation slab.

[0004] Because the bending moment at the base of some steel columns is relatively small, extending them all to the foundation slab would result in significant waste. Furthermore, the steel columns would need to be encased in steel-concrete composite columns or multi-layered columns outside the basement, increasing construction difficulty. Therefore, a steel-structure embedded column base joint with clearly defined structural stress and not extending entirely into the basement is urgently needed. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings in the above-mentioned background technology and provide a steel structure embedded column foot anchorage node that does not extend into the basement on a whole floor. This steel structure embedded column foot anchorage node should reduce waste and lower the construction difficulty.

[0006] The technical solution of this utility model is:

[0007] A non-full-floor steel structure embedded column foot anchorage node extending into a basement, characterized in that: it includes a steel structure column; the steel structure column includes a column body located above the basement roof slab and a column foot embedded in the basement concrete column and fixed to the basement roof slab; the embedment depth of the column foot is less than the floor height of the basement connected to the basement roof slab.

[0008] The steel structure column is at least one of the following: closed section column, open section column, and composite column.

[0009] The steel structure column is provided with a short steel beam welded to the column base and extending into the concrete beam; the short steel beam is an open-section beam.

[0010] The outer wall of the column base is provided with anchoring connectors; the anchoring connectors are welded studs, welded ring bars, or welded steel ring plates; the outer wall of the short steel beam is provided with shear connectors; the shear connectors are welded studs or channel steel.

[0011] The column body is a composite column; the column base is an open-section column.

[0012] Both the column body and the column base are closed-section columns; the interior of the column body and the column base is filled with concrete to form a reinforced zone.

[0013] The steel structure column is equipped with stiffening ribs inside, and the stiffening ribs are equipped with casting holes and ventilation holes.

[0014] The height difference between the top surface of the reinforced area and the top surface of the basement roof slab is greater than or equal to the cross-sectional height of the steel structure column.

[0015] The concrete column comprises, from bottom to top, a foundation section, a variable cross-section section, and an enlarged section; the column base is embedded in the enlarged section; the variable cross-section section transitions at an angle of Δ / h0≤1 / 6; and the transition section between the variable cross-section section and the enlarged section is reinforced with longitudinal bars.

[0016] The stirrups of the concrete beam in the overlapping section between the short steel beam and the concrete beam are arranged with increased density; the stirrups of the concrete column in the transition section between the enlarged section and the variable cross-section section are arranged with increased density.

[0017] The beneficial effects of this utility model are:

[0018] This invention uses the basement roof slab as the embedded end of the upper steel structure (column). The embedment depth of the embedded column foot is measured from the basement roof slab. The appropriate height of the top of the basement concrete column is used as the embedded column foot, which can reduce the length of the basement steel structure column and save costs. The steel structure column does not extend into the basement for its entire length, avoiding the formation of a full-length composite column, which can avoid the complex construction of composite column reinforcement and steel frame. It can also reduce the cross-sectional size of the basement column and improve the utilization rate of basement space. Attached Figure Description

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

[0020] Figure 1 This is a typical vertical cross-sectional view of an embodiment of this utility model.

[0021] Figure 2This is a typical cross-sectional view of an embodiment of the present utility model.

[0022] The markings in the diagram are: 1. Steel structure column; 2. Basement roof slab; 3. Concrete beam; 3. Concrete column; 3. Foundation section; 4. Enlarged section; 5. Variable cross-section section; 6. Short steel beam; 7. Reinforcing longitudinal reinforcement; 8. Concrete beam stirrups; 9. Concrete column stirrups; 10. Reinforced zone; 11. Temporary fixed anchor bolt; 12. Shear connection; 13. Anchorage connection; 14. Stiffening rib; 15. Ventilation hole; 16. Pouring hole; 17. Column base; 18. Column body; 19. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0024] A non-full-floor embedded column foot anchorage node for steel structures extending into the basement, comprising a steel structure column 1.

[0025] The steel structure column is divided into a column body 19 and a column base 18. The part of the steel structure column located above the top surface of the basement roof slab is the column body, and the part of the steel structure column located below the top surface of the basement roof slab is the column base.

[0026] The basement roof slab 2 serves as the fixed end for the steel structure column. The basement roof slab must meet the relevant specifications and calculation requirements for being the fixed part of the steel structure column. Below the basement roof slab are concrete beam 3-1 and concrete column 3-2. The basement roof slab is fixed to the column base of the steel structure column. The column base of the steel structure column is embedded downwards into the concrete column for anchoring. The embedment depth of the column base is less than the floor height of the basement connected to the basement roof slab (the embedment depth is measured from the top surface of the basement roof slab).

[0027] The outer wall of the column base is provided with anchoring connectors 14 to strengthen the joint work of the steel structure column and the concrete column. The anchoring connectors are welded studs, welded ring reinforcements, or welded steel ring plates.

[0028] The steel structure column is at least one of the following: closed-section column, open-section column, and composite column. Specifically: the closed-section column is a hollow square steel tube column, a hollow round steel tube column, or a hollow rectangular steel tube column; the open-section column is an H-shaped steel column, an I-shaped steel column, a T-shaped steel column, an L-shaped steel column, a cross-shaped steel column, or a lattice-type steel column; the composite column is a steel-concrete composite column, a composite column, or a steel-concrete composite column. The steel structure column can adopt the following structures:

[0029] (1) The column shaft is a closed-section column, and the column base is an open-section column:

[0030] As a preferred option, the column body is made of hollow square steel tube, and the column base is made of cross-shaped steel column to facilitate the concrete pouring of the column base.

[0031] The interior of the column is filled with concrete or grout to form a reinforced zone. The height difference between the top surface of the reinforced zone and the top surface of the basement slab is greater than or equal to the cross-sectional height of the steel structure column.

[0032] (2) The column body is a composite column, and the column base is an open section column:

[0033] As a preferred option, the column body is made of steel-concrete composite column and the column base is made of cross-shaped steel column to facilitate the concrete pouring of the column base;

[0034] (3) The column with closed cross-sections in both the column body and column base:

[0035] The steel structure columns adopt the same type of closed-section columns, which is preferred. Both the column body and the column base are hollow square steel tube columns.

[0036] The steel structure column is equipped with stiffening ribs 15 inside. The stiffening ribs are located at the top elevation of the basement roof slab (i.e., the connection between the column body and the column base). The stiffening ribs are equipped with pouring holes 17 and ventilation holes 16 to facilitate the pouring of concrete.

[0037] The interior of the column body and column base is filled with concrete or grout to form a reinforced zone 11. The height difference between the top surface of the reinforced zone and the top surface of the basement slab is greater than or equal to the cross-sectional height of the steel structure column.

[0038] For hollow square steel pipe columns, the section height is the side length of the section; for hollow rectangular steel pipe columns, the section height is the length of the longer side of the section; for hollow circular steel pipe columns, the section height is the diameter.

[0039] The steel structure column is also equipped with a short steel beam 7. One end of the short steel beam is welded to the column base, and the other end of the short steel beam extends horizontally into the concrete beam connected to the concrete column. The stirrups 9 of the concrete beam in the overlapping section of the short steel beam and the concrete beam are arranged with increased density.

[0040] The short steel beam is an open-section beam. The open-section beam can be an H-beam, I-beam, T-beam, L-beam, or cruciform beam. The outer wall (flange or web) of the short steel beam is equipped with shear connectors 13. These shear connectors are welded studs or channel steel.

[0041] The cross-sectional dimensions of the concrete column embedded in the column base must meet the requirements of the relevant specifications for the thickness of the protective layer of the outer column base, and should also meet the relevant calculation requirements. If the cross-sectional dimensions of the concrete column at the column base do not meet the requirements, the cross-section should be enlarged. Enlargement of the cross-section includes:

[0042] The concrete column consists of a foundation section 4, a variable cross-section section 6, and an enlarged section 5 from bottom to top. The cross-section of the enlarged section is larger than that of the foundation section, and the enlarged section and the foundation section are connected by a variable cross-section section. The variable cross-section section is connected by an angle Δ / h0≤1 / 6 (the slope of the concrete variable cross-section). The variable cross-section section has reinforcing longitudinal bars 8, with both ends of the reinforcing longitudinal bars extending into the foundation section and the enlarged section, respectively. The enlarged section, the variable cross-section section, and the foundation section within a certain height range below the variable cross-section section are all reinforced with concrete column stirrups 10.

[0043] like Figure 1 , Figure 2 As shown, the construction method for this implementation case is as follows:

[0044] 1. The steel structure columns are hollow square steel tube columns, and the anchoring connectors are welded studs. The short steel beams are H-shaped steel beams, and the shear connectors are welded studs.

[0045] 2. Specify the length of the column base 18 of the hollow square steel tube column and the cross-sectional dimensions and length of the short steel beam 7. The hollow square steel tube column and the short steel beam are fabricated in the steel structure factory. The welded studs on the sidewalls of the column base and the welded studs on the short steel beam are also welded in the steel structure factory.

[0046] 3. For the foundation section, variable cross-section section and some enlarged sections of the basement concrete column, the reinforcement is tied and the formwork is installed on the construction site. Temporary anchor bolts 12 are pre-embedded at the bottom elevation of the column base. The concrete column is poured to the bottom elevation of the column base and cured to the design strength.

[0047] 4. The hollow square steel tube columns, prefabricated in the factory, are fixed to the concrete columns using temporary anchor bolts 12. The remaining enlarged section of reinforcing bars and the reinforcing bars of the concrete beams are tied together. The corresponding formwork is installed, and the beam and column concrete is poured. At the same time, concrete or grout is poured into the hollow square steel tubes, ultimately forming a non-full-story steel structure column embedded column foot node.

[0048] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A non-integral embedded column base anchorage node for a steel structure extending into a basement, characterized in that: It includes a steel structure column (1); the steel structure column includes a column body (19) located above the basement roof slab and a column base (18) embedded in the basement concrete column and fixed to the basement roof slab; the embedment depth of the column base is less than the floor height of the basement connected to the basement roof slab.

2. The embedded column base anchorage node for a non-full-floor steel structure extending into the basement according to claim 1, characterized in that: The steel structure column is at least one of the following: closed section column, open section column, and composite column.

3. The embedded column base anchorage node for a non-full-floor steel structure extending into the basement according to claim 2, characterized in that: The steel structure column is provided with a short steel beam (7) that is welded to the column base and extends into the concrete beam; the short steel beam is an open-section beam.

4. The embedded column base anchorage node for a non-full-floor steel structure extending into the basement according to claim 3, characterized in that: The outer wall of the column base is provided with an anchoring connector (14); the anchoring connector is a welded stud, a welded ring bar, or a welded steel ring plate; the outer wall of the short steel beam is provided with a shear connector (13); the shear connector is a welded stud or a channel steel.

5. The embedded column base anchorage node for a non-full-floor steel structure extending into the basement according to claim 4, characterized in that: The column body is a composite column; the column base is an open-section column.

6. The embedded column base anchorage node for a non-full-floor steel structure extending into the basement according to claim 4, characterized in that: Both the column body and the column base are closed-section columns; the interior of the column body and the column base is filled with concrete to form a reinforced zone (11).

7. A steel structure embedded column base anchorage node that extends into the basement without forming a full floor, as described in claim 6, is characterized in that: The steel structure column is provided with stiffening ribs (15) inside, and the stiffening ribs are provided with casting holes (17) and ventilation holes (16).

8. A steel structure embedded column base anchorage node that extends into the basement without forming a full floor, as described in claim 7, is characterized in that: The height difference between the top surface of the reinforced area and the top surface of the basement roof slab is greater than or equal to the cross-sectional height of the steel structure column.

9. A non-full-floor embedded column base anchorage node for steel structures extending into a basement according to claim 5 or 8, characterized in that: The concrete column consists of a foundation section (4), a variable cross-section section (6), and an enlarged section (5) from bottom to top; the column base is embedded in the enlarged section; the variable cross-section section uses an angle of Δ / h0≤1 / 6 for cross-section transition; the variable cross-section section is reinforced with longitudinal reinforcement (8).

10. A steel structure embedded column base anchorage node that extends into the basement without forming an entire floor, as described in claim 9, is characterized in that: The stirrups (9) of the concrete beam in the overlapping section of the short steel beam and the concrete beam are arranged in a denser manner; the stirrups (10) of the concrete column in the enlarged section and the variable cross-section section are arranged in a denser manner.

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