Reinforcing device for reducing sudden change of concrete filled steel tube latticed column at variable cross-section
By reinforcing the steel pipe concrete lattice column at the variable cross-section, connecting the upper and lower parts with a ferrule and a bubbling rod to form a composite pipe column and a Z-shaped structure, the problem of sudden stiffness at the variable cross-section is solved, and the seismic performance and stability of the structure are improved.
Patent Information
- Application Number
- CN202420786729.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-04-16
AI Technical Summary
The rigidity of the steel pipe concrete lattice column at the variable cross-section is suddenly changed due to the fact that the concrete is not fully filled, resulting in brittle damage to the structure under the action of earthquakes.
A reinforcement device is adopted, including an upper round steel pipe column, a lower steel pipe concrete column, a front and rear ferrule, bolts, transverse and oblique abdominal rods, through these components, the upper and lower parts are connected into a composite pipe column, and a Z-structure is formed through the abdominal rods to enhance the connection strength.
It effectively reduces the stiffness sudden change of steel pipe concrete lattice columns at variable cross-sections, improves the seismic performance and stability of the structure, and prevents the occurrence of brittle damage.
Smart Images
Figure CN222701577U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of steel tube concrete lattice column system, and relates to a reinforcement device for reducing the sudden change of steel tube concrete lattice column at the variable section, more precisely, a reinforcement device for reducing the sudden change of stiffness of partially filled steel tube concrete lattice column at the variable section. Background Art
[0002] With the development of industry, the height of the single floor required for the UHV test hall has gradually increased from 20m to 50~60m. Existing high-rise factory buildings usually use steel tube lattice columns and steel tube concrete lattice columns. However, due to the low overall bearing capacity and stiffness of steel tube lattice columns, steel tube concrete lattice columns are often used for factories with large spans, heights and loads. The concrete construction method of steel tube concrete lattice columns is generally to pour concrete into the steel tube after the steel tube is installed. Common construction methods include bottom jacking and upper high throwing. However, when the height of the steel tube concrete column is too high, the bottom jacking concrete pouring method is used, which is easy to cause excessive pressure on the bottom steel pipe, resulting in the bottom steel pipe bursting. The high throwing construction method is too costly and difficult to construct. Therefore, when designing a plant with a large height and high strength requirements, the lattice column design adopts partial filling of concrete, that is, the bottom jacking method is adopted to inject concrete into the steel tube to form a new type of composite component (CFT-S: lower steel tube concrete lattice column, upper steel tube lattice column). It can give full play to the performance advantages of steel tube and concrete and reduce the construction difficulty, while overcoming the disadvantage of local buckling at the bottom of the steel tube, and improving the stability and seismic performance of the lattice column.
[0003] However, since the concrete is not fully filled, it is easy to cause the lattice column to have a stiffness problem at the concrete variable section, causing the structure to suffer brittle failure under the action of an earthquake. Summary of the invention
[0004] The utility model aims to provide a reinforcement device for reducing the sudden change of steel tube concrete lattice columns at variable cross-sections, so as to reinforce partially filled steel tube concrete and prevent the sudden change of stiffness of partially filled steel tube concrete lattice columns at variable cross-sections.
[0005] The purpose of the utility model is achieved in this way. A reinforcement device for reducing the sudden change of a steel tube concrete lattice column at a variable cross-section is characterized in that it at least comprises: an upper round steel tube column 1, a lower steel tube concrete column 2, a front hoop 5, a rear hoop 6, a bolt 7, a transverse web and an oblique web member; the front hoop 5 and the rear hoop 6 connect the upper round steel tube column 1 and the lower steel tube concrete column 2 into a composite tube column by means of the bolt 7; at least one middle transverse web member 9 is connected at the joint position of the upper round steel tube column 1 and the lower steel tube concrete column 2, and a connection point of the middle transverse web member 9 has an upward and downward middle oblique web member 8 and a lower oblique web member 10 to connect the two composite tubes into a group of concrete lattice columns.
[0006] The front hoop 5 and the rear hoop 6 are densely covered with connection holes for the connection bolts 7, and the interval between the connection holes is between 2-4 of the diameter of the connection bolts 7, so as to ensure the strength of the composite pipe string.
[0007] The length of the front hoop 5 or the rear hoop 6 and the length of the middle oblique web member 8 and the middle transverse web member 9 have the following relationship: a right-angled side and a hypotenuse of a right-angled triangle are connected by the middle oblique web member 8 and the middle transverse web member 9, and the other right-angled side is composed of a section of the front hoop 5 or the rear hoop 6, and the other section of the front hoop 5 or the rear hoop 6 is greater than or equal to 1 / 3 of the length of the front hoop 5 or the rear hoop 6.
[0008] The composite pipe string comprises at least four groups of Z-shaped structures formed by connecting the middle oblique web members 8 and the middle transverse web members 9.
[0009] The utility model is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;
[0011] Figure 2 It is a front view of the utility model;
[0012] Figure 3 It is the front and rear ferrules and connection method.
[0013] In the figure, 1. upper round steel tube column; 2. lower steel tube concrete column; 3. upper transverse web member; 4. upper oblique web member; 5. front hoop; 6. rear hoop; 7. bolt; 8. middle oblique web member; 9. middle transverse web member; 10. lower oblique web member. DETAILED DESCRIPTION
[0014] like Figure 1 , Figure 2 , Figure 3As shown, a reinforcement device for reducing the sudden change of steel tube concrete lattice column at the variable cross-section is characterized in that it at least includes: an upper round steel tube column 1, a lower steel tube concrete column 2, a front hoop 5, a rear hoop 6, bolts 7, transverse webs and oblique web members; the front hoop 5 and the rear hoop 6 connect the upper round steel tube column 1 and the lower steel tube concrete column 2 into a composite tube column through the bolts 7; at least one middle transverse web member 9 is connected at the joint position of the upper round steel tube column 1 and the lower steel tube concrete column 2, and one connection point of the middle transverse web member 9 has an upward and downward middle oblique web member 8 and a lower oblique web member 10 to connect the two composite tubes into a group of concrete lattice columns.
[0015] The front hoop 5 and the rear hoop 6 are densely covered with connection holes for the connection bolts 7, and the interval between the connection holes is between 2-4 of the diameter of the connection bolts 7, so as to ensure the strength of the composite pipe string.
[0016] The length of the front hoop 5 or the rear hoop 6 and the length of the middle oblique web member 8 and the middle transverse web member 9 have the following relationship: a right-angled side and a hypotenuse of a right-angled triangle are connected by the middle oblique web member 8 and the middle transverse web member 9, and the other right-angled side is composed of a section of the front hoop 5 or the rear hoop 6, and the other section of the front hoop 5 or the rear hoop 6 is greater than or equal to 1 / 3 of the length of the front hoop 5 or the rear hoop 6.
[0017] The composite pipe string comprises at least four groups of Z-shaped structures formed by connecting the middle oblique web members 8 and the middle transverse web members 9.
[0018] Step 1: Reserve two layers of distance at the boundary surface for reinforcement of the partially filled steel tube concrete lattice column. The webs of the upper steel tube lattice column and the lower steel tube concrete lattice column can be welded to the column in advance.
[0019] The second step: installation of the hoops. The hoops are divided into front and rear hoops. Wrap the two hoops around the variable cross-section of the lattice column, and then connect the two hoops with bolts.
[0020] The third step: welding between the middle web and the hoop.
Claims
1. A reinforcement device for reducing the sudden change of steel tube concrete lattice column at the variable cross section, characterized by comprising: An upper round steel tube column (1), a lower steel tube concrete column (2), a front hoop (5), a rear hoop (6), bolts (7), a transverse web and an oblique web member; the front hoop (5) and the rear hoop (6) connect the upper round steel tube column (1) and the lower steel tube concrete column (2) into a composite tube column through the bolts (7); at least one middle transverse web member (9) is connected at the joint position between the upper round steel tube column (1) and the lower steel tube concrete column (2); a connection point of the middle transverse web member (9) has an upward and downward middle oblique web member (8) and a lower oblique web member (10) to connect the two composite tubes into a set of concrete lattice columns.
2. A reinforcement device for reducing the sudden change of a steel tube concrete lattice column at a variable cross-section according to claim 1, characterized in that: The front hoop (5) and the rear hoop (6) are densely covered with connection holes for connecting bolts (7) on both sides.
3. A reinforcement device for reducing the sudden change of a steel tube concrete lattice column at a variable cross-section according to claim 1, characterized in that: The length of the front hoop (5) or the rear hoop (6) and the length of the middle oblique web member (8) and the middle transverse web member (9) have the following relationship: the middle oblique web member (8) and the middle transverse web member (9) are connected to form a right-angled triangle with one right-angled side and a hypotenuse, the other right-angled side is formed by a section of the front hoop (5) or the rear hoop (6), and the other section of the front hoop (5) or the rear hoop (6) is greater than or equal to 1 / 3 of the length of the front hoop (5) or the rear hoop (6).
4. A reinforcement device for reducing the sudden change of a steel tube concrete lattice column at a variable cross-section according to claim 1, characterized in that: The composite pipe string comprises more than four groups of Z-shaped structures formed by connecting middle oblique web members (8) and middle transverse web members (9).