Outer wrapping type column base joint for lifting concrete column from steel reinforced concrete transfer beam
By setting outsourcing steel pipes and stiffeners at the root of the concrete column to form outsourcing nodes of the steel pipe concrete columns, the problem that the longitudinal reinforcement bars of concrete columns in high-rise buildings cannot be anchored to the steel concrete beams, and the high seismic resistance and construction convenience of the column feet are achieved.
Patent Information
- Application Number
- CN202420328495.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-21
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-02-21
AI Technical Summary
In high-rise buildings, when the bottom floor requires large space, the upper vertical components cannot be continuously penetrated and landed, the existing specifications and drawings fail to effectively solve the problem that the longitudinal reinforcement of concrete columns cannot be directly anchored to the steel concrete beams, especially the earthquake resistance. The demand is not met.
By setting outsourcing steel pipes at the root of the concrete column, the outsourcing nodes of the steel pipe concrete column are formed, the anchoring of longitudinal steel bars is realized, and the bending bearing capacity of the node is enhanced through stiffeners and fixtures, so that the bearing capacity of the column foot is greater than that of the frame column members.
This solution not only solves the problem of longitudinal reinforcement anchoring, but also improves the seismic resistance of the column feet, which is convenient to construct and reliable in quality, meeting the needs of "strong nodes and weak components".
Smart Images
Figure CN222206797U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building structures, in particular to an outsourced column foot node for a concrete column on a steel-concrete conversion beam. Background Art
[0002] In multi-story buildings, when the building functions of the bottom floors require a larger space and the upper vertical components cannot be continuously connected to the ground, large-span steel-concrete transfer beams are often used in structural design to support the concrete columns of the upper floors. However, the current specifications and drawings do not have relevant construction methods for the column base nodes in this situation.
[0003] The key to this kind of column foot node is how to solve the problem of anchoring the longitudinal reinforcement of the concrete column. For this purpose, the utility model sets an outer steel pipe at the root of the concrete column to form an outer steel tube concrete column node. This solution can not only solve the problem that the longitudinal reinforcement of the concrete column cannot be directly anchored to the steel concrete beam, but also realize the seismic demand of "strong node weak component" where the bearing capacity of the column foot is greater than the bearing capacity of the frame column component. Utility Model Content
[0004] Based on the above description, the utility model provides an outsourced column base node for a concrete column on a steel-concrete transfer beam to solve the problem that the longitudinal reinforcement of the concrete column cannot pass through the steel and then be anchored in the concrete.
[0005] The utility model solves the above-mentioned technical problems with a technical solution as follows: an outsourced column foot node of a concrete column on a steel-concrete conversion beam, comprising: a steel-concrete conversion beam and a concrete column, wherein an outsourced steel pipe is arranged at a node core area at a connection between the steel-concrete conversion beam and the concrete column, wherein the steel-concrete conversion beam comprises a steel section and a concrete structure, wherein the concrete structure is laid around the steel section, wherein a first steel bar along the length direction of the steel section and stirrups arranged along the cross-sectional direction of the steel section are arranged inside the concrete structure, wherein the stirrups are fixed to the outside of the first steel bar, wherein the outsourced steel pipe is connected to the steel section, wherein a stiffening rib is arranged at a connection between the concrete column and the lower steel section, wherein a fixing piece is arranged on an inner wall of the outsourced steel pipe, wherein a second steel bar vertical to the ground direction is arranged inside the concrete column, wherein the second steel bar is inserted down to the bottom of the outsourced steel pipe.
[0006] On the basis of the above technical solution, the present invention can also be improved as follows.
[0007] Furthermore, the steel section includes upper and lower flanges, the outer steel pipe is welded to the upper flange, and the stiffening ribs are arranged between the upper and lower flanges at the node core area of the steel section.
[0008] Furthermore, the steel section also includes a middle web, and a plurality of stiffening ribs are provided, and the stiffening ribs are arranged perpendicular to the beam axis of the steel-concrete conversion beam, and the thickness of the stiffening ribs is the same as the thickness of the flange, and the spacing between the plurality of stiffening ribs is not less than 0.5 times the height of the web and not more than 2 times the height of the web.
[0009] Furthermore, the flange is locally and symmetrically widened in the core area of the node, and the width of the widened flange is the width of the steel-concrete transfer beam minus 200mm. The slope of the gradual change of the flange width from the core area of the node to both sides of the steel-concrete transfer beam is not greater than 1:5.
[0010] Furthermore, a rectangular hole is reserved at the bottom of the outer steel pipe, the first steel bar and the stirrups pass through the rectangular hole to be connected to the steel section, the width of the rectangular hole is at least 10 mm larger than the diameter of the first steel bar, and the rectangular holes are spaced no more than 200 mm apart.
[0011] Furthermore, when the number of the first steel bars is large, a portion of the first steel bars are evenly arranged and pass through the rectangular holes, and the remaining portion of the first steel bars pass through the outside of the outer steel pipe and are connected to the steel section.
[0012] Furthermore, the inner wall size of the outer steel pipe is the same as the outer contour size of the concrete column, and the bending bearing capacity of the outer steel pipe is not less than 1.2 times the bending bearing capacity of the concrete column.
[0013] Furthermore, when the cross-section of the concrete column is rectangular, the height of the outer steel pipe is not less than 2.5 times the length of the cross-section of the concrete column.
[0014] Furthermore, when the cross-section of the concrete column is circular, the height of the outer steel pipe is not less than 2.5 times the diameter of the concrete column.
[0015] Furthermore, the fixing parts include studs arranged around the outer steel pipe, the diameter of the studs is not less than 16 mm, and the stud spacing is not greater than 200 mm.
[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:
[0017] The outsourced column base node forms an outsourced column base of a steel tube concrete column by arranging an outsourced steel pipe at the root of the concrete column, so as to achieve the seismic resistance requirement of a "strong node and weak component" in which the bearing capacity of the column base is greater than the bearing capacity of the frame column component; the longitudinal reinforcement of the concrete column only needs to extend to the bottom of the outsourced steel pipe, without the need for welding or binding, and the construction is convenient and the construction quality is easy to ensure, which solves the problem that the longitudinal reinforcement of the concrete column cannot pass through the steel section and then be anchored in the concrete. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A schematic structural diagram of an outsourced column foot node of a concrete column on a steel-concrete transfer beam provided by an embodiment of the utility model;
[0019] Figure 2 for Figure 1 Schematic diagram of the cross section along AA;
[0020] Figure 3 for Figure 1 Schematic diagram of the cross section along BB;
[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0022] 1. Steel-concrete transfer beam; 11. Concrete structure; 2. Concrete column; 3. Outer steel pipe; 4. Steel; 41. Flange; 42. Web; 5. Fixing parts; 6. Second steel bar; 7. Stiffening rib; 8. Rectangular hole; 9. First steel bar; 91. Stirrups. DETAILED DESCRIPTION
[0023] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0025] When used herein, the singular forms "a", "an" and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.
[0026] See also Figure 1-3 The present invention provides a technical solution: an outsourced column foot node for a concrete column on a steel-concrete transfer beam, comprising: a steel-concrete transfer beam 1, a concrete column 2;
[0027] An outer steel pipe 3 is provided at the node core area of the connection between the steel-concrete conversion beam 1 and the concrete column 2. The steel-concrete conversion beam 1 includes a steel 4 and a concrete structure 11. The concrete structure 11 is laid around the steel 4. The concrete structure 11 is also provided with a first steel bar 9 along the length direction of the steel 4 and a stirrup 91 provided along the cross-sectional direction of the steel 4. The stirrup 91 is fixed to the outside of the first steel bar 9. The outer steel pipe 3 is connected to the steel 4. A stiffening rib 7 is provided at the connection between the concrete column 2 and the lower steel 4. A fixing piece 5 is provided on the inner wall of the outer steel pipe 3. A second steel bar 6 vertical to the ground is also provided inside the concrete column 2. The second steel bar 6 is inserted to the bottom of the outer steel pipe 3. It should be noted that the node core area here refers to the connection between the steel-concrete conversion beam 1 and the concrete column 2. The concrete column 2 here is poured from the outer steel pipe 3 to be self-compacted.
[0028] Please see attached Figure 1 Here, the first steel bar 9 is a transversely arranged steel bar, and the second steel bar 6 is a longitudinal steel bar.
[0029] Please see attached Figure 1 , Attachment Figure 3 The steel section 4 includes upper and lower flanges 41, the outer steel pipe 3 is welded to the upper flange 41, and the steel section 4 is provided with the stiffening rib 7 between the upper and lower flanges 41 at the core area of the node. It should be noted that the stiffening rib 7 plays a supporting role here.
[0030] Please see attached Figure 1 , Attachment Figure 3 , the steel section 4 also includes a middle web 42, the stiffening ribs 7 are provided in multiple pieces, the stiffening ribs 7 are provided perpendicular to the beam axis of the steel-concrete transfer beam 1, the thickness of the stiffening ribs 7 is the same as the thickness of the flange 41, and the spacing between the multiple stiffening ribs 7 is not less than 0.5 times the height of the web 42 and not more than 2 times the height of the web 42. That is to say, the steel section 4 in the steel-concrete transfer beam 1 is provided with the stiffening ribs 7 supporting the beam axis perpendicular to the beam axis between the upper and lower flanges 41 of the node core area, and the thickness of the stiffening ribs 7 is the same as the thickness of the flange 41 of the steel section 4.
[0031] Please see attached Figure 2, the flange 41 is locally widened symmetrically in the core area of the node, and the width of the widened flange 41 is the width of the steel-concrete transfer beam 1 minus 200mm, and the slope of the gradual change of the width of the flange 41 from the core area of the node to the two sides of the steel-concrete transfer beam 1 is not greater than 1:5. It should be noted that the width of the widened flange 41 here is equal to the width of the steel-concrete transfer beam 1 minus 200mm. The slope of the gradual change of the width of the flange 41 should not be too large, and the slope is not greater than 1:5.
[0032] Preferably, a rectangular hole 8 is reserved at the bottom of the outer steel pipe 3, and the first steel bar 9 and the stirrup 91 pass through the rectangular hole 8 to connect with the steel section 4. The width of the rectangular hole 8 is at least 10 mm greater than the diameter of the first steel bar 9, and the spacing between the rectangular holes 8 is no more than 200 mm. It should be noted that the bottom of the outer steel pipe 3 here refers to the side of the outer steel pipe 3 close to the bottom having a rectangular hole 8, because the first steel bar 9 can pass through the rectangular hole 8. In a specific embodiment, the rectangular holes 8 here have a width of the diameter of the first steel bar 9 + 10 mm, a height of 100 mm, and a spacing of 200 mm.
[0033] Specifically, when the number of the first steel bars 9 is large, a portion of the first steel bars 9 is evenly arranged and passes through the rectangular hole 8, and the remaining portion of the first steel bars 9 passes through the outside of the outer steel pipe 3 and is connected to the section steel 4. In other words, when the number of longitudinal steel bars on the top surface of the beam is large, the steel bars passing through the rectangular hole 8 can be vertically arranged in two rows and passed through the reserved holes, and the remaining steel bars bypass the outer steel pipe 3 and pass through.
[0034] Preferably, the inner wall size of the outer steel pipe 3 is the same as the outer contour size of the concrete column 2, and the bending bearing capacity of the outer steel pipe 3 is not less than 1.2 times the bending bearing capacity of the concrete column 2. It should be noted that the wall thickness of the outer steel pipe 3 is determined based on the principle that the bending bearing capacity of the outer steel pipe 3 is not less than 1.2 times the bending bearing capacity of the concrete column 22.
[0035] Preferably, when the cross-section of the concrete column 2 is rectangular, the height of the outer steel pipe 3 is not less than 2.5 times the length of the cross-section of the concrete column 2 .
[0036] Preferably, when the cross section of the concrete column 2 is circular, the height of the outer steel pipe 3 is not less than 2.5 times the diameter of the concrete column 2. In other words, the height of the outer steel pipe 3 is not less than 2.5 times the long side dimension of the concrete column 2.
[0037] Preferably, the fixing member 5 comprises studs arranged around the outer steel pipe 3, the diameter of the studs is not less than 16 mm, and the stud spacing is not greater than 200 mm.
[0038] In a specific embodiment, in a certain actual project, the cross-sectional size of the steel-concrete transfer beam 1 is 1000 mm (width) × 1800 mm (height), and the cross-sectional size of the internal steel 4 is H1500 The upper and lower flanges 41 of the steel beam 4 in the core area of the node are symmetrically widened to 800mm. A support stiffener plate perpendicular to the beam axis is arranged between the upper and lower flanges 41 of the steel beam, and the cross-sectional dimensions are 380mm×1420mm×40mm (4 pieces on each side, 8 pieces in total); the cross-sectional dimensions of the concrete column 2 are 600mm×600mm, and the longitudinal reinforcement of the concrete column 2 is 16Φ22; the cross-sectional dimensions of the external steel pipe 3 are 670mm(length)×670mm(width)×35mm(wall thickness), and the height is 1500mm. Two rectangular holes 8 (8 in total) are reserved on each side of the root of the external steel pipe 3, and the dimensions of the rectangular hole 8 are 32mm(width)×100mm(height). Bolts φ16@200 are arranged on the inner wall of the external steel pipe 3. During the implementation process, the welding of the stiffening plate and the steel beam, the welding of the outer steel pipe 3 and the upper flange 41 of the steel beam, and the welding of the studs on the inner wall of the outer steel pipe 3 can all be completed in the steel structure factory, and no welding construction is required on site. After the longitudinal steel bars of the concrete column 2 extend to the bottom of the outer steel pipe 3, the concrete can be poured, and the construction quality can be effectively guaranteed, and the construction is convenient. The node connection is safe and reliable, the force transmission path is clear, the on-site construction is convenient, and it has engineering application value.
[0039] To sum up, the outsourced column base node forms an outsourced column base of a steel tube concrete column 2 at the root of the concrete column 2 by setting an outsourced steel pipe 3, so as to achieve the seismic resistance requirement of a "strong node and weak component" in which the bearing capacity of the column base is greater than the bearing capacity of the frame column component; the longitudinal reinforcement of the concrete column 2 only needs to extend to the bottom of the outsourced steel pipe 3, without the need for welding or binding, and the construction is convenient and the construction quality is easy to ensure, which solves the problem that the longitudinal reinforcement of the concrete column 2 cannot pass through the steel section 4 and then be anchored in the concrete.
[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. An outsourced column foot node for a concrete column on a steel-concrete transfer beam, characterized in that: include: A steel-concrete transfer beam and a concrete column, wherein an outer steel pipe is arranged at the core area of the node at the connection between the steel-concrete transfer beam and the concrete column, the steel-concrete transfer beam comprises a steel section and a concrete structure, the concrete structure is laid around the steel section, a first steel bar along the length direction of the steel section and stirrups arranged along the cross-sectional direction of the steel section are arranged inside the concrete structure, the stirrups are fixed on the outside of the first steel bar, the outer steel pipe is connected to the steel section, a stiffening rib is arranged at the connection between the concrete column and the lower steel section, a fixing piece is arranged on the inner wall of the outer steel pipe, a second steel bar vertical to the ground is arranged inside the concrete column, and the second steel bar is inserted down to the bottom of the outer steel pipe.
2. The outsourced column base node for a concrete column on a steel-concrete transfer beam according to claim 1 is characterized in that: The steel section comprises upper and lower flanges, the outer steel pipe is welded to the upper flange, and the steel section is provided with stiffening ribs between the upper and lower flanges at the node core area.
3. The outsourced column base node for a concrete column on a steel-concrete transfer beam according to claim 2 is characterized in that: The steel section also includes a middle web, and a plurality of stiffening ribs are provided. The stiffening ribs are arranged perpendicular to the beam axis of the steel-concrete conversion beam, and the thickness of the stiffening ribs is the same as the thickness of the flange. The spacing between the plurality of stiffening ribs is not less than 0.5 times the height of the web and not more than 2 times the height of the web.
4. The outsourced column base node for a concrete column on a steel-concrete transfer beam according to claim 2 is characterized in that: The flange is locally widened symmetrically in the core area of the node, and the width of the widened flange is the width of the steel-concrete transfer beam minus 200 mm. The slope of the flange width gradually changing from the core area of the node to both sides of the steel-concrete transfer beam is not greater than 1:
5.
5. The outsourced column base node for a concrete column on a steel-concrete transfer beam according to claim 1 is characterized in that: A rectangular hole is reserved at the bottom of the outer steel pipe, the first steel bar and the stirrup pass through the rectangular hole to be connected to the steel section, the width of the rectangular hole is at least 10 mm larger than the diameter of the first steel bar, and the rectangular holes are spaced no more than 200 mm apart.
6. The outsourced column base node for a concrete column on a steel-concrete transfer beam according to claim 5 is characterized in that: When the number of the first steel bars is large, a portion of the first steel bars are evenly arranged and pass through the rectangular hole, and the remaining portion of the first steel bars pass through the outside of the outer steel pipe and are connected to the steel section.
7. The outsourced column base node for a concrete column on a steel-concrete transfer beam according to claim 1 is characterized in that: The inner wall size of the outer steel pipe is the same as the outer contour size of the concrete column, and the bending bearing capacity of the outer steel pipe is not less than 1.2 times the bending bearing capacity of the concrete column.
8. The outsourced column base node for a concrete column on a steel-concrete transfer beam according to claim 1, characterized in that: When the cross section of the concrete column is rectangular, the height of the outer steel pipe is not less than 2.5 times the length of the cross section of the concrete column.
9. The out-wrapped column base node for a concrete column on a steel-concrete transfer beam according to claim 1, characterized in that: When the cross-section of the concrete column is circular, the height of the outer steel pipe is not less than 2.5 times the diameter of the concrete column.
10. The out-wrapped column base node for a concrete column on a steel-concrete transfer beam according to claim 1, characterized in that: The fixing parts include studs arranged around the outer steel pipe, the diameter of the studs is not less than 16 mm, and the stud spacing is not greater than 200 mm.