CN211285679U

CN211285679U - Steel construction rigid connection column base node structure

Info

Publication number: CN211285679U
Application number: CN201921470410.7U
Authority: CN
Inventors: 于鹏; 刘巍
Original assignee: Beijing Shougang International Engineering Technology Co Ltd
Current assignee: Beijing Shougang International Engineering Technology Co Ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-08-18
Anticipated expiration: 2029-09-04

Abstract

A steel structure rigid connection column base node structure belongs to the technical field of building structure engineering. The post-cast concrete short column comprises a first steel bar (1), a second steel bar (2), a stirrup (3), a third steel bar (4), a post-cast concrete short column (5), a column base shoe beam (6), a column base anchor bolt (7), a caulking material (8) and a steel column (9); the steel column (9) is connected with the column base shoe beam (6) in a welding mode, a secondary grouting layer is used for leveling and placing on a foundation and is connected with the foundation in an installation mode through a column base anchor bolt (7), the first steel bar (1), the second steel bar (2), the third steel bar (4) and the stirrup (3) are arranged on the periphery of the steel column, and concrete is poured later to form a post-pouring concrete short column (5). The method has the advantage of solving the problem of insufficient ultimate bearing capacity of the connection of the exposed column base and the foundation. Compared with an embedded column base, the embedded column base can effectively reduce the thickness of the foundation and is convenient for foundation construction; compared with an outer wrapping column base, the height of the short column can be greatly reduced. The column base node is simple in structure, definite in force transmission and capable of better realizing the design principle that the structural member is strongly connected with the weak member.

Description

Steel construction rigid connection column base node structure

Technical Field

The utility model belongs to the technical field of building structure engineering, concretely relates to steel construction rigid connection column base node structure.

Background

In a building steel structure frame, a column base is generally designed into a rigid column base structure when no support exists or the bending moment of the column base is large. When the existing earthquake-resistant standard requires that the column is used as a lateral force resistant component, the column base and the foundation meet the connection limit bearing capacity, and the design principle that the structural component is strongly connected with the weak component is realized. At present, the commonly used rigid connection column base structure in China generally adopts an embedded type column base, an inserted type column base, an external wrapping type column base and an exposed type column base. The exposed column base is applied more in China, but the existing earthquake-resistant standard only proposes 6 degrees and 7 degrees of earthquake resistance and does not propose the 8 degrees of earthquake resistance. The general exposed column shoe is more suitable as a semi-rigid column shoe from a mechanical point of view. Compared with the full-section yield bearing capacity of the section of the root of the steel column, the plastic bending moment of the column base determined by the yield of the anchor bolt is smaller in most cases. The mechanical properties of the column base when being bent are mainly determined by the properties of the anchor bolt. If the anchor bolt can fully develop plasticity after being stretched and yielded, the restoring force characteristic of the exposed column base presents a typical sliding type hysteresis characteristic when the anchor bolt bears repeated load. However, in the actual column shoe, the threaded portion is often broken before the undiminished portion of the cross-section of the anchor bolt yields, and sufficient plastic development is difficult to achieve. Moreover, when the column shoe is subjected to a large earthquake, it is uneconomical to adopt the exposed type, and it is difficult to satisfy the ultimate bearing capacity of the connection.

Disclosure of Invention

An object of the utility model is to provide a steel construction rigid connection column base node structure solves the not enough problem of exposed column base and basic connection's limit bearing capacity. The exposed beam with the boots is rigidly connected with the column base, and the column body bearing capacity transmitted by the column base shoe beam is effectively transmitted through the post-cast concrete short column, so that the connection limit bearing capacity of the column base and the foundation is easily met. The design principle that the structural member is connected with the strong connecting member and the weak connecting member is realized. Compared with an embedded column base, the embedded column base can effectively reduce the thickness of the foundation and is convenient for foundation construction; compared with an outer wrapping column base, the height of the short column can be greatly reduced. The column base node is simple in structure, definite in force transmission and capable of better realizing the design principle that the structural member is strongly connected with the weak member.

The utility model discloses a first reinforcing bar 1, second reinforcing bar 2, stirrup 3, third reinforcing bar 4, post-cast concrete short column 5, column base boots roof beam 6, column base crab-bolt 7, caulking material 8, steel column 9. The steel column 9 is connected with the column base shoe beam 6 in a welding mode, is leveled and placed on the foundation by a secondary grouting layer, and is connected with the foundation through the column base anchor bolt 7 in an installation mode. The first steel bar 1, the second steel bar 2, the third steel bar 4 and the stirrup 3 are arranged on the periphery of the steel column, and the post-cast concrete forms a post-cast short column 5 to resist the counter force transmitted from the column foot shoe beam 6.

The utility model discloses in, boots roof beam height h1 and column base crab-bolt need satisfy the column base design value and connect the requirement of limit bearing capacity, and simultaneously, the column base crab-bolt also will satisfy the interim requirement of steel construction installation.

The utility model discloses in, first reinforcing bar (1), second reinforcing bar 2 and stirrup 3 form four sides rectangle hidden beam at the short column top and arrange. The diameters and the numbers of the first steel bar 1, the second steel bar 2, the third steel bar 4 and the stirrup 3 of the height h2 of the hidden beam are determined by calculation, and the requirements of column base design values and connection limit bearing capacity are met. The anchoring length of the steel bars is required to meet the corresponding specification requirements. First reinforcing bar (1), second reinforcing bar (2), third reinforcing bar 4 and stirrup 3 equidistant arranging to the interval should not be too close. If the reinforcing steel bar 2 meets the blocking of the column base anchor bolt nut, the blocking can be avoided properly.

In the utility model, the post-cast concrete short column 5 adopts concrete or fine stone concrete with the strength grade higher than the first grade of the foundation; a20 mm gap is reserved between the post-cast concrete at the top of the column foot boot beam and the steel column 9, and the gap is filled with caulking materials 8. Prevent rainwater from infiltrating into the column base to corrode the steel structure.

The first steel bar 1 in the short column is bent into a U shape and anchored in the foundation, and the third steel bar 4 is bent into an L shape and anchored in the foundation; the second reinforcing steel bar 2 is horizontally placed on the top surface of the boot beam. The first steel bar 1, the second steel bar 2 and the equidistant stirrups 3 form a four-side rectangular hidden beam arrangement at the top of the short column. Upward counter force transmitted by the column base shoe beam is applied to the column top hidden beam and is effectively transmitted to the foundation through the first reinforcing steel bars 1, the third reinforcing steel bars 4 and the column base anchor bolts.

The utility model has the advantages that: 1) compared with an embedded rigid column base, the column base does not need to be deeply embedded in the foundation, so that the thickness of the foundation can be reduced, and the foundation construction is facilitated; 2) compared with the externally-wrapped rigid column base, the height of the post-cast short column is obviously smaller than that of the externally-wrapped column base (at least 2.5 times of the height of the steel column); 3) compared with an exposed rigid column base, the column base is higher in rigidity, larger in plastic bending moment, higher in connection limit bearing capacity between the column base and a foundation, smaller in diameter of an anchor bolt and better capable of realizing the design principle that a structural member is strongly connected with a weak member.

Drawings

Fig. 1 is a plan view of the rigid connection column base structure of the present invention.

FIG. 2 is a sectional view of the vertical surface A-A of the rigid connection column base structure of the present invention

FIG. 3 is a B-B sectional view of the vertical surface of the rigid connection column base structure of the present invention

FIG. 4 is a C-C sectional view of the vertical surface of the rigid connection column base structure of the present invention

Fig. 5 is a D-D sectional view of the vertical surface of the rigid connection column base structure of the present invention.

Fig. 6 is a sectional view of the plane E-E of the rigid connection column base structure of the present invention.

In the figure, a first steel bar 1, a second steel bar 2, a stirrup 3, a third steel bar 4, a post-cast concrete short column 5, a column base shoe beam 6, a column base anchor bolt 7, a caulking material 8 and a steel column 9.

Detailed Description

Fig. 1-6 illustrate an embodiment of the present invention.

1. The steel column 9 is connected with the column base shoe beam 6 in a welding mode, is leveled and placed on the foundation by a secondary grouting layer, and is connected with the foundation through the column base anchor bolt 7 in an installation mode. The height h1 of the shoe beam and the column base anchor bolt need to meet the requirements of column base design value and connection limit bearing capacity, and meanwhile, the column base anchor bolt also needs to meet the temporary requirements of steel structure construction and installation.

2. Bending the first steel bar 1 into a U shape to be anchored in the foundation, and bending the third steel bar 4 into an L shape to be anchored in the foundation; the second reinforcing steel bar 2 is horizontally placed on the top surface of the boot beam. The first steel bar 1, the second steel bar 2 and the stirrup 3 form a four-side rectangular hidden beam arrangement at the top of the short column. The diameters and the numbers of the first steel bar 1, the second steel bar 2, the third steel bar 4 and the stirrup 3 of the height h2 of the hidden beam are determined by calculation, and the requirements of column base design values and connection limit bearing capacity are met. The anchoring length of the steel bars is required to meet the corresponding specification requirements.

3. And (3) pouring concrete or fine stone concrete with the strength grade higher than the strength grade of the foundation concrete by more than one grade to form the post-cast concrete short column 5. A20 mm gap is reserved between the top of the column foot shoe beam 6 and the steel column 9 for post-cast concrete, and the gap is filled with caulking materials 8. Prevent rainwater from infiltrating into the column base to corrode the steel structure.

Claims

1. A steel structure rigid connection column base node structure is characterized by comprising first steel bars (1), second steel bars (2), stirrups (3), third steel bars (4), post-cast concrete short columns (5), column base shoe beams (6), column base anchor bolts (7), caulking materials (8) and steel columns (9); the steel column (9) is connected with the column base shoe beam (6) in a welding mode, a secondary grouting layer is used for leveling and placing on a foundation and is connected with the foundation in an installation mode through a column base anchor bolt (7), the first steel bar (1), the second steel bar (2), the third steel bar (4) and the stirrup (3) are arranged on the periphery of the steel column, and concrete is poured later to form a post-pouring concrete short column (5).

2. The steel structure rigid-connection column foot node structure according to claim 1, wherein the first steel bars (1), the second steel bars (2) and the stirrups (3) form a four-sided rectangular hidden beam arrangement at the top of the short column, and the first steel bars (1), the second steel bars (2), the third steel bars (4) and the stirrups (3) are arranged at equal intervals.

3. The steel structure rigid-connection column base node structure according to claim 1, wherein the post-cast concrete short column (5) is made of concrete or fine-stone concrete with the strength level higher than that of the foundation by more than one level, a gap of 20mm needs to be reserved between the post-cast concrete on the top of the column base shoe beam and the steel column (9), and the gap is filled with caulking materials (8).

4. The steel structural rigid-connection column foot node structure according to claim 1, wherein the first steel bars (1) in the short column are bent into a U shape and anchored in the foundation, and the third steel bars (4) are bent into an L shape and anchored in the foundation; the second steel bars (2) are horizontally placed on the top surface of the boot beam.