Connecting structure of concrete filled steel tube frame column and concrete shear wall
By setting the first shear key and the second shear key in the connection nodes of the steel pipe concrete frame column and the concrete shear wall, and extending it to the concrete shear wall for anchoring, the problems of insufficient strength and poor seismic ductility of the existing connecting nodes are solved, and higher bearing capacity and seismic resistance are achieved.
Patent Information
- Application Number
- CN202421417647.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The connection between the existing steel pipe concrete frame column and the concrete shear wall is limited due to the limitation of the size of the bolts, resulting in insufficient strength of the connection node and poor seismic ductility.
The first shear bond and the second shear bond are arranged in parallel. One end of the first shear bond and one end of the second shear bond are connected to the steel pipe concrete frame column, and the other end extends into the concrete shear wall, and are anchored to the concrete shear wall through the first shear bond and the second shear bond.
The tensile, shear bearing capacity and seismic ductility of the connecting nodes are improved, and the reliable connection between the steel pipe concrete frame column and the concrete shear wall is ensured, and the structure's bearing capacity and seismic performance are improved.
Smart Images
Figure CN222649048U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of building structures, and in particular relates to a connection structure between a steel tube concrete frame column and a concrete shear wall. Background Art
[0002] In the design of housing structure, steel tube concrete column bearing has the characteristics of high load-bearing capacity and good ductility, and reinforced concrete shear wall has the characteristics of large lateral stiffness. Therefore, the combined load-bearing shear wall formed by connecting the steel tube concrete frame column and the reinforced concrete shear wall through shear keys is usually used in structural systems such as steel frame reinforced concrete shear wall, steel frame reinforced concrete core tube, and steel frame basement part. Due to its advantages of high bearing capacity and good seismic performance, it has been widely used in the industry. Among them, the connection between the steel tube concrete frame column and the reinforced concrete shear wall is the key point to ensure the bearing capacity and seismic performance of the building.
[0003] In the prior art, the connection between the steel tube concrete frame column and the cast-in-place concrete shear wall generally adopts the technical solution of welding studs or steel shear keys on the steel tube and extending the shear keys into the reinforced concrete wall to achieve shear resistance. Among them, the stud shear keys are most suitable for use in actual projects due to their advantages such as high shear strength and convenient construction. However, the existing studs are limited in size, resulting in technical problems such as low strength of the connection node formed by the connection and poor seismic ductility. Utility Model Content
[0004] In order to solve the technical problem in the background technology that during the connection process of steel tube concrete frame columns and concrete shear walls, the size of bolts is limited, resulting in insufficient connection node strength and poor seismic ductility, the utility model provides a connection structure between steel tube concrete frame columns and concrete shear walls.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A connection structure for a steel tube concrete frame column and a concrete shear wall, comprising a connection node formed by connecting the steel tube concrete frame column and the concrete shear wall, the connection node comprising a first shear key and a second shear key arranged in parallel, one end of the first shear key and one end of the second shear key are both connected to the steel tube concrete frame column, and the other end of the first shear key and the other end of the second shear key extend into the concrete shear wall.
[0007] Optionally, there are multiple first shear keys and multiple second shear keys; the connection node is provided with multiple rows of shear components along the height direction of the concrete shear wall, each row of the shear components includes multiple first shear keys and multiple second shear keys, and the first shear keys and the second shear keys in each row of the shear components are alternately arranged.
[0008] Optionally, the first shear key is a stud, and the second shear key is a steel section.
[0009] Optionally, the ratio of the length to the diameter of the peg is greater than or equal to 4, and the length of the peg is less than or equal to 200 mm.
[0010] Optionally, the connection between the steel tube concrete frame column and the concrete shear wall is a connecting surface, on which the horizontal and vertical spacings of the first shear keys are less than or equal to 200 mm, and the horizontal and vertical spacings of the first shear keys are greater than or equal to four times the diameter of the first shear key.
[0011] Optionally, the second shear keys are welded to the steel tube concrete frame column with equal strength, and the distribution spacing between the second shear keys is greater than or equal to 500 mm.
[0012] Optionally, the concrete shear wall includes hidden columns and non-hidden column walls, the hidden columns are connected to the steel tube concrete frame columns to form the connection nodes, and the non-hidden column walls are connected to the side of the hidden columns away from the steel tube concrete frame columns; the first shear key and the second shear key both extend into the hidden columns.
[0013] Optionally, a steel frame is provided in the concealed column, and the first shear key and the second shear key both extend into the steel frame and are connected to the steel frame.
[0014] Optionally, the steel tube concrete frame column includes a steel tube body; a cavity is provided in the steel tube body, and the cavity is used to accommodate concrete; a connecting surface is provided on the outer side of the steel tube body extending along the height direction of the steel tube body, and the connecting surface is used to connect the first shear key, the second shear key and the concrete shear wall.
[0015] Optionally, a plurality of stiffening plates are arranged in the cavity along the height direction of the steel pipe body, the plane where each stiffening plate is located is parallel to the transverse section of the steel pipe body, the plurality of stiffening plates divide the cavity into a plurality of accommodating cavities, and each stiffening plate is provided with casting holes and air holes.
[0016] The beneficial effects of the utility model are:
[0017] The utility model provides a connection structure for a steel tube concrete frame column and a concrete shear wall, including a connection node formed by connecting the steel tube concrete frame column and the concrete shear wall, the connection node including a first shear key and a second shear key arranged in parallel, one end of the first shear key and one end of the second shear key are both connected to the steel tube concrete frame column, and the other end of the first shear key and the other end of the second shear key are both extended into the concrete shear wall. In this embodiment, the connection node provided for the steel tube concrete frame column and the concrete shear wall extends the first shear key and the second shear key combination into the concrete shear wall, and is anchored to the concrete shear wall through the first shear key and the second shear key, so as to fully exert the shearing effect of the first shear key while effectively shortening the anchoring length of the first shear key, improve the tensile and shear bearing capacity and seismic ductility of the connection node, ensure the reliable connection between the steel tube concrete frame column and the concrete shear wall, and improve the bearing capacity and seismic performance of the structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a side schematic diagram of the connection structure for the steel tube concrete frame column and the concrete shear wall described in the utility model;
[0019] Figure 2 It is a top view schematic diagram of the connection structure between the steel tube concrete frame column and the concrete shear wall described in the utility model.
[0020] Among them: 1. The first shear key; 2. The second shear key; 3. The hidden column; 31. The steel frame; 311. The vertical steel bars; 312. The wall stirrups; 4. The non-hidden column wall; 41. The vertical steel bars of the wall; 42. The horizontal steel bars of the wall; 43. The wall tension bars; 5. The steel pipe body; 51. The accommodating cavity; 6. The stiffening plate; 61. The casting hole; 62. The air vent. DETAILED DESCRIPTION
[0021] In the prior art, there are two main connection methods used in buildings. One is to connect the steel member to the outer wall of the steel tube concrete frame column, insert the steel member into the concrete shear wall, and complete the connection through the steel member. However, the shear resistance of the steel member used in this method is generally low and it is not easy to transport; the other method is to connect the bolts to the outer wall of the steel tube concrete frame column, so that the bolts extend into the concrete shear wall to complete the connection. When the bolt connection method is selected, when the bolts with a length greater than 200 mm are selected, due to the limited operating space of the equipment welding, the bolts cannot be efficiently welded by a welding gun, and generally manual welding is required. Manual welding has the problem of large welding workload and the welding quality cannot be effectively guaranteed, resulting in low strength of the connection node formed by the connection; and when a short bolt with a length less than 200 mm is selected, although a welding gun can be used for welding, when the bolt length is short, its shear strength is small, which still leads to low strength of the connection surface node formed by the bolt connection.
[0022] In view of the above technical problems, the utility model provides a connection structure for concrete-filled steel tube frame columns and concrete shear walls.
[0023] See also Figure 1 and Figure 2 , shows a schematic diagram of a connection structure for a steel tube concrete frame column and a concrete shear wall described in the utility model, wherein the steel tube concrete frame column is connected to the concrete shear wall to form a connection node, and the connection node includes a first shear key 1 and a second shear key 2 arranged in parallel, one end of the first shear key 1 and one end of the second shear key 2 are both connected to the steel tube concrete frame column, and the other end of the first shear key 1 and the other end of the second shear key 2 are both extended into the concrete shear wall, so that the first shear key 1 and the second shear key 2 are anchored to each other. In a specific application, the second shear key 2 can be effectively anchored to the horizontal steel bars in the concrete shear wall and the tensile strengths they are subjected to are equal, so that the shearing effect of the first shear key 1 is fully utilized, and the anchoring length of the first shear key 1 can be effectively shortened, and the tensile and shear bearing capacity and seismic ductility of the connection node are improved.
[0024] In this embodiment, a connection structure for a steel tube concrete frame column and a concrete shear wall is provided, in which a first shear key 1 and a second shear key 2 are combined and extended into the concrete shear wall, and the first shear key 1 and the second shear key 2 are anchored to the concrete shear wall, thereby obtaining a stronger connection strength, ensuring a reliable connection between the steel tube concrete frame column and the concrete shear wall, and ensuring the bearing capacity and seismic performance of the building.
[0025] For example, the first shear key 1 can be selected as a bolt, and the second shear key 2 can be selected as a steel section, specifically any one of a U-shaped steel section, a type steel section and an I-shaped steel section. For example, the first shear key 1 and the second shear key 2 in the utility model can be selected as a plurality, and are arranged at intervals to be connected to the steel tube concrete frame column. It should be noted that those skilled in the art can select the specific number, model, type and material of the first shear key 1 and the second shear key 2 according to actual production and use requirements, and no specific limitation is made in this embodiment.
[0026] Furthermore, the stud length of the first shear key 1 can be selected to be 200 mm or less, so that direct welding can be performed using a stud welding gun, thereby improving welding efficiency and quality.
[0027] Optionally, the first shear key 1 and the second shear key 2 described in the utility model are both multiple; and the connection node is provided with multiple rows of shear components along the height direction of the concrete shear wall, each row of the shear components includes multiple first shear keys 1 and multiple second shear keys 2, and the first shear keys 1 and the second shear keys 2 in each row of shear components are alternately arranged. Generally, the second shear key 2 welded to the steel tube concrete frame column should have a tensile bearing capacity along the length direction of the concrete shear wall that is not less than the tensile bearing capacity of the horizontal steel bars in the concrete shear wall.
[0028] In this embodiment, the first shear keys 1 and the second shear keys 2 in each row of shear components are alternately arranged, and a more stable shear connection is formed by alternately arranging multiple first shear keys 1 and second shear keys 2. It should be noted that those skilled in the art can specifically select the spacing and arrangement between the first shear keys 1 and the second shear keys 2 according to actual production and use requirements, and no further limitation is made in this embodiment.
[0029] Optionally, the first shear key 1 described in the utility model is a stud, and the second shear key 2 is a steel. For example, the second shear key 2 can be selected as a U-shaped steel, and the two ends of the U-shaped steel are welded to the outer wall of the steel tube concrete frame column, and the U-shaped steel is extended into the concrete shear wall, specifically, it should be extended into the hidden column 3 of the concrete shear wall. Further, the length of the U-shaped steel in the extension direction of the concrete shear wall can be selected to be consistent with the length of the hidden column 3.
[0030] It should be noted that the technical solution provided in this embodiment is only a more preferred one. Those skilled in the art can select the type, length and model of the steel section according to actual production and use requirements, and no specific limitation is made in this embodiment.
[0031] Optionally, the ratio of the length to the diameter of the bolt described in the present invention is greater than or equal to 4, and the length of the bolt is less than or equal to 200 mm, thereby ensuring the shear resistance of the bolt and facilitating welding operations.
[0032] In this embodiment, the length of the stud can be selected to be less than or equal to 200 mm, so that the stud can be directly welded to the outer wall of the steel tube concrete frame column using an electric stud welding gun, avoiding manual welding due to excessive length, reducing welding efficiency and weld shear strength, and improving the connection strength of the connection node; at the same time, because the ratio of the stud length to the diameter is greater than or equal to 4, the stud can have stable and reliable shear resistance.
[0033] It should be noted that those skilled in the art can select the length and diameter of the bolt according to specific production and use requirements. This embodiment only provides a more preferred technical solution.
[0034] Optionally, the connection between the steel tube concrete frame column and the concrete shear wall described in the utility model is a connecting surface, on which the horizontal and vertical spacings of the first shear key 1 are less than or equal to 200 mm, and the horizontal and vertical spacings of the first shear key 1 are greater than or equal to four times the diameter of the first shear key 1, thereby improving the shear resistance of the first shear key 1.
[0035] In this embodiment, the horizontal and vertical spacings of the first shear key 1 are both less than or equal to 200 mm, and the horizontal and vertical spacings of the first shear key 1 are both greater than or equal to four times the diameter of the first shear key 1, so that the shear resistance provided by the first shear key 1 is stronger; the shear bearing capacity of the connecting surface is jointly provided by the first shear key 1 and the second shear key 2, and the shear bearing capacity of the connecting surface provided jointly should not be less than the maximum bearing capacity of the shear section of the concrete shear wall, and at the same time, the first shear key 1 provides shear bearing capacity in addition to the second shear key 2.
[0036] Optionally, equal strength welding is adopted between the second shear keys 2 described in the utility model and the steel tube concrete frame column, and the distribution spacing between the second shear keys 2 is greater than or equal to 500 mm.
[0037] In this embodiment, equal strength welding is adopted between the second shear key 2 and the steel tube concrete frame column to reduce the stress and deformation generated by the welding weld, avoid the instability and cracking of the second shear key 2, improve the quality and reliability of welding, and then improve the shear strength of the structure; at the same time, the spacing between the second shear keys 2 is greater than or equal to 500 mm, avoiding overly dense welding operations, reducing manual workload while ensuring shear strength.
[0038] Optionally, the concrete shear wall described in the utility model includes a hidden column 3 and a non-hidden column wall 4, wherein the hidden column 3 is connected to the steel tube concrete frame column to form a connection node body, and the non-hidden column wall 4 is connected to the side of the hidden column 3 away from the steel tube concrete frame column; the first shear key 1 and the second shear key 2 both extend into the hidden column 3.
[0039] In this embodiment, the hidden column 3 in the concrete shear wall is located at the edge of the concrete shear wall and connected to the steel tube concrete frame column, which plays a role in bearing the shear force on the wall. The width of the hidden column 3 is equal to the non-hidden column wall 4 of the concrete shear wall. The first shear key 1 and the second shear key 2 both extend into the hidden column 3, and a stronger force is exerted through the hidden column 3, thereby improving the connection strength of the connection node.
[0040] For example, when the second shear key 2 is selected as a U-shaped steel, the preferred length of the U-shaped steel can be selected to be consistent with the width of the hidden column 3 into which it extends or 400 mm long. When the first shear key 1 is selected as a stud, its length should be less than or equal to 200 mm. Within this ratio range, the connection strength of the connection node is optimized. It should be noted that this embodiment only shows a more preferred implementation, and those skilled in the art can specifically select the length ratio of the first shear key 1 and the second shear key 2 according to their production and use requirements.
[0041] Optionally, a steel bar frame 31 is provided in the concealed column 3 described in the utility model, and the first shear key 1 and the second shear key 2 both extend into the steel bar frame 31 and are connected to the steel bar frame 31. Specifically, the steel bar frame 31 may at least include a plurality of vertical steel bars 311 and a plurality of wall stirrups 312 sleeved on the vertical steel bars 311. When the second shear key 2 is selected as a U-shaped steel, the four inner corners of the U-shaped steel can be abutted against the vertical steel bars 311, and connected by welding, so that the steel bar frame 31 and the steel are integrated, thereby improving the connection strength of the connection node. When the first shear key 1 is selected as a bolt, it can be welded to the steel bar frame 31 to improve the connection strength of the connection node.
[0042] In this embodiment, the first shear key 1 and the second shear key 2 are both extended into the steel frame 31 in the concealed column 3 and connected to the steel frame 31, thereby further improving the connection strength of the connection node. It should be noted that those skilled in the art can specifically select the connection method of the first shear key 1, the second shear key 2 and the steel frame 31 according to actual production and use requirements, and the welding connection method in this embodiment is only a more preferred implementation method.
[0043] Furthermore, a plurality of vertical wall reinforcements 41, horizontal wall reinforcements 42 and wall tension reinforcements 43 are also provided in the non-hidden column wall 4 of the concrete shear wall to further improve the strength of the concrete shear wall.
[0044] Optionally, the steel tube concrete frame column described in the utility model includes a steel tube body 5; a cavity is provided in the steel tube body 5, and concrete is accommodated through the cavity; a connecting surface is provided on the outer side of the steel tube body 5 extending along the height direction of the steel tube body 5, and the first shear key 1, the second shear key 2 and the concrete shear wall are connected through the connecting surface, specifically, it can be a connecting bolt, a steel section and a hidden column 3.
[0045] In this embodiment, a cavity for accommodating concrete is provided in the steel tube body 5, and concrete is poured through the cavity to form a steel tube concrete frame column; a connecting surface is provided on the outer side of the steel tube body 5, and the first shear key 1 and the second shear key 2 are connected by welding through the connecting surface. During the construction process, it can be transported more conveniently and quickly, and the pouring of concrete can be completed at the construction site, thereby improving construction efficiency and shortening the construction period.
[0046] Optionally, the cavity described in the present invention is further provided with a plurality of stiffening plates 6, which are arranged along the height direction of the steel pipe body to divide the cavity into a plurality of accommodating cavities 51, and a pouring hole 61 and a vent hole 62 are arranged on the stiffening plate 6. The pouring operation of concrete is completed through the pouring hole 61, and the air vent hole 62 ensures the air pressure balance of each accommodating cavity 51 during the concrete pouring process.
[0047] In this embodiment, the stiffening plate 6 and the steel pipe body 5 can be connected by welding, and the stiffening plate 6 can enhance the structural strength, rigidity and stability of the steel pipe body 5 when connected to the floor beam.
[0048] For example, the pouring hole 61 on the stiffening plate 6 can be set at the center of the stiffening plate 6, and the diameter of the pouring hole 61 is not less than 150 mm; the number of the air holes 62 can be multiple, and they are evenly set at the edge of the stiffening plate 6, specifically at the four corners of the stiffening plate 6, and the diameter of the air holes 62 does not exceed 25 mm. It should be noted that those skilled in the art can select the specific model, size, number and arrangement of the stiffening plate 6, the pouring hole 61 and the air holes 62 according to the actual production and use needs. This embodiment only provides a more preferred implementation scheme, and the utility model does not make specific limitations on this.
Claims
1. A connection structure for a steel tube concrete frame column and a concrete shear wall, comprising a connection node formed by connecting the steel tube concrete frame column and the concrete shear wall, characterized in that: The connection node comprises a first shear key (1) and a second shear key (2) arranged in parallel, wherein one end of the first shear key (1) and one end of the second shear key (2) are both connected to the steel tube concrete frame column, and the other end of the first shear key (1) and the other end of the second shear key (2) extend into the concrete shear wall.
2. The connection structure according to claim 1, characterized in that: The first anti-shear key (1) and the second anti-shear key (2) are both multiple; The connection node is provided with a plurality of rows of shear assemblies along the height direction of the concrete shear wall, each row of the shear assemblies comprises a plurality of the first shear keys (1) and a plurality of the second shear keys (2), and the first shear keys (1) and the second shear keys (2) in each row of the shear assemblies are alternately arranged.
3. The connection structure according to claim 1, characterized in that: The first shear key (1) is a stud, and the second shear key (2) is a steel section.
4. The connection structure according to claim 3, characterized in that: The ratio of the length to the diameter of the bolt is greater than or equal to 4, and the length of the bolt is less than or equal to 200 mm.
5. The connection structure according to claim 1, characterized in that: The connection between the steel tube concrete frame column and the concrete shear wall is a connection surface, on which the horizontal and vertical spacings of the first shear keys (1) are both less than or equal to 200 mm, and the horizontal and vertical spacings of the first shear keys (1) are both greater than or equal to 4 times the diameter of the first shear keys (1).
6. The connection structure according to claim 1, characterized in that: The second shear keys (2) are welded to the steel tube concrete frame column with equal strength, and the distribution spacing between the second shear keys (2) is greater than or equal to 500 mm.
7. The connection structure according to claim 1, characterized in that: The concrete shear wall comprises a concealed column (3) and a non-concealed column wall (4), wherein the concealed column (3) is connected to the steel tube concrete frame column to form the connection node, and the non-concealed column wall (4) is connected to a side of the concealed column (3) away from the steel tube concrete frame column; The first anti-shear key (1) and the second anti-shear key (2) both extend into the hidden column (3).
8. The connection structure according to claim 7, characterized in that: A steel bar frame (31) is provided in the concealed column (3), and the first shear key (1) and the second shear key (2) both extend into the steel bar frame (31) and are connected to the steel bar frame (31).
9. The connection structure according to claim 1, characterized in that: The steel tube concrete frame column comprises a steel tube body (5); The steel pipe body (5) is provided with a cavity therein, and the cavity is used to contain concrete; A connection surface is provided on the outer side of the steel pipe body (5) extending along the height direction of the steel pipe body (5), and the connection surface is used to connect the first shear key (1), the second shear key (2) and the concrete shear wall.
10. The connection structure according to claim 9, characterized in that: A plurality of stiffening plates (6) are arranged in the cavity along the height direction of the steel pipe body (5), and the plane where each stiffening plate (6) is located is parallel to the transverse section of the steel pipe body (5). The plurality of stiffening plates (6) divide the cavity into a plurality of accommodating cavities (51), and each stiffening plate (6) is provided with a casting hole (61) and a vent hole (62).