Round steel tube concrete shock insulation column
By introducing H-beams and optimizing the connection method into circular steel-concrete composite seismic isolation columns, the problem of instability of circular steel-concrete composite columns under strong earthquakes was solved, achieving high strength and stiffness, reducing cross-sectional dimensions, and enhancing the safety and applicability of the structure.
Patent Information
- Application Number
- CN202520153545.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Under strong earthquakes, ordinary circular steel-concrete composite columns are prone to instability and failure, as well as anchorage failure between the steel-concrete composite columns and seismic isolation bearings, which limits the effectiveness of seismic isolation and requires increasing the cross-sectional dimensions to ensure structural stability.
The structure adopts a circular steel-concrete composite isolation column, which includes a lower concrete foundation, isolation bearings, steel box, circular steel-concrete composite and H-beams. It is connected by high-strength bolts and pre-embedded anchor bars, and the column base connection method is optimized. It combines the advantages of circular and square isolation columns to improve strength and stiffness and reduce cross-sectional size.
It effectively improves the strength and stiffness of the seismic isolation column, avoids weld and anchor bolt fractures, enhances the safety and applicability of the structure, and reduces the possibility of brittle failure of the structure.
Smart Images
Figure CN223867534U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building technology, and in particular to a circular steel tube concrete seismic isolation column. Background Technology
[0002] Concrete-steel tubular structures have high load-bearing capacity and good seismic isolation performance. After applying seismic isolation technology, their seismic isolation capacity can be further improved, enabling buildings to remain stable during earthquakes. Therefore, they are widely used in the field of building seismic isolation. Seismic isolation technology is a new type of seismic-resistant building structure. By setting seismic isolation pads or seismic isolation bearings, it prevents the upward transmission of seismic forces, thereby reducing the direct impact of seismic waves on buildings.
[0003] In practical engineering applications, ordinary circular steel-concrete composite columns are prone to instability and failure under strong earthquakes. Anchorage failure and connection failure between the steel-concrete composite column and the seismic isolation bearing also limit its ability to achieve optimal seismic isolation performance. Under the sustained action of a strong earthquake, the seismic isolation column bears enormous horizontal shear force. To ensure its structural stability, its cross-sectional dimensions often need to be increased to guarantee safety, which greatly limits the application and construction of seismic isolation technology. Utility Model Content
[0004] To address the aforementioned problems, this invention provides a circular steel-tube concrete isolation column that can reduce the cross-sectional dimensions while improving the column's stiffness and stability.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A circular steel-concrete composite seismic isolation column includes a lower concrete foundation, seismic isolation bearings, a steel box, a circular steel-concrete composite tube, and H-beams.
[0007] The lower concrete foundation is constructed by pouring concrete, and one side of the lower concrete foundation is fixedly connected to the seismic isolation bearing;
[0008] The side of the seismic isolation bearing away from the lower concrete foundation is fixedly connected to the steel box;
[0009] The circular steel pipe concrete is provided with a circular steel pipe, one end of which is located inside the steel box, and concrete is poured between the steel box and the circular steel pipe concrete.
[0010] The H-beam is located inside the circular steel tube.
[0011] Furthermore, the steel box includes a bottom steel plate and side steel plates. One side of the bottom steel plate is fixedly connected to the seismic isolation support, and the other side is welded to the circular steel pipe. The side steel plates are welded around the bottom steel plate, and adjacent side steel plates are welded to each other to form a box cavity. The circular steel pipe concrete is located inside the box cavity.
[0012] Furthermore, the seismic isolation bearing includes a lower connecting plate, an upper connecting plate, and a seismic isolation layer, with both sides of the seismic isolation layer being fixedly connected to the lower connecting plate and the upper connecting plate, respectively.
[0013] The lower concrete foundation is pre-embedded with a first high-strength threaded sleeve. One side of the lower concrete foundation is provided with a perforated steel plate. The first high-strength threaded sleeve is welded to the perforated steel plate. The lower connecting plate is provided with a first high-strength bolt. The first high-strength bolt passes through the lower connecting plate and the perforated steel plate in sequence and is then threaded into the first high-strength threaded sleeve.
[0014] The steel box has a second high-strength threaded sleeve embedded in the concrete. The second high-strength threaded sleeve is welded to the bottom steel plate. The upper connecting plate is provided with a second high-strength bolt. The second high-strength bolt passes through the upper connecting plate and the bottom steel plate and is then threaded into the second high-strength threaded sleeve.
[0015] Furthermore, the vibration isolation layer includes a lead core, a lower sealing plate, an upper sealing plate, and a protective outer layer.
[0016] The lead cores are fitted with vibration isolation pads, each vibration isolation pad comprising an inner steel plate and an inner rubber, with the inner steel plate and the inner rubber being stacked alternately. The two ends of the lead cores are respectively fixedly connected to the lower sealing plate and the upper sealing plate. The lower sealing plate is fixedly connected to the lower connecting plate, and the upper sealing plate is fixedly connected to the upper connecting plate. The protective outer layer covers the vibration isolation pads and is fixedly connected to the outer walls of the inner steel plate and the inner rubber of the lower sealing plate and the upper sealing plate, respectively.
[0017] Furthermore, a first pre-embedded anchor bar is fixedly provided at the end of the first high-strength threaded sleeve away from the first high-strength bolt, and a second pre-embedded anchor bar is fixedly provided at the end of the second high-strength threaded sleeve away from the second high-strength bolt, and both the first pre-embedded anchor bar and the second pre-embedded anchor bar are L-shaped structures.
[0018] Furthermore, a reinforcing steel cage is provided inside the circular steel tube concrete, and the reinforcing steel cage is located outside the H-beam.
[0019] The beneficial effects of this utility model are:
[0020] 1. By setting H-beams inside circular steel tube concrete, the advantages of circular and square seismic isolation columns are combined. This avoids the uneven stress that square seismic isolation columns are prone to. Moreover, compared with traditional seismic isolation columns, it improves the strength of the seismic isolation column body, effectively reduces the cross-sectional size, and improves the applicability of the seismic isolation column.
[0021] 2. The circular steel tube concrete base located inside the steel box optimizes the column foot connection, making it less prone to weld and anchor bolt breakage. It also increases the moment of inertia of the bottom section, which is beneficial for the isolation column to withstand axial and bending loads. Connecting the isolation bearings to the lower concrete foundation and steel box with high-strength bolts improves the stiffness and strength of the column foot, preventing instability or tearing, effectively fulfilling the seismic isolation task of the structure, reducing the possibility of brittle failure, and improving the structural safety. Attached Figure Description
[0022] Figure 1 This is a structural schematic diagram of a circular steel tube concrete isolation column according to a preferred embodiment of the present invention.
[0023] Figure 2 This is a schematic diagram of a circular steel tube concrete isolation column according to a preferred embodiment of the present invention.
[0024] Figure 3 This is a schematic diagram of the seismic isolation support for a circular steel tube concrete seismic isolation column according to a preferred embodiment of the present invention.
[0025] In the diagram, 1-lower concrete foundation, 11-perforated steel plate, 101-first high-strength threaded sleeve, 2-seismic isolation bearing, 21-lower connecting plate, 22-upper connecting plate, 23-seismic isolation layer, 231-lead core, 232-lower sealing plate, 233-upper sealing plate, 234-outer protective layer, 235-inner steel plate, 236-inner rubber, 3-steel box, 301-second high-strength threaded sleeve, 31-bottom steel plate, 32-side steel plate, 4-circular steel pipe concrete, 41-reinforcing steel cage, 5-H-beam, 61-first pre-embedded anchor bar, 62-second pre-embedded anchor bar. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0029] Please also see Figure 1 and Figure 2 A preferred embodiment of the present invention is a circular steel tube concrete isolation column, comprising a lower concrete foundation 1, an isolation bearing 2, a steel box 3, a circular steel tube concrete 4, and an H-beam 5.
[0030] The lower concrete foundation 1 is constructed by pouring concrete, and one side of the lower concrete foundation 1 is fixedly connected to the seismic isolation bearing 2;
[0031] The side of the seismic isolation bearing 2 away from the lower concrete foundation 1 is fixedly connected to the steel box 3;
[0032] The circular steel pipe concrete 4 is provided with a circular steel pipe 41, one end of which is located inside the steel box 3, and concrete is poured between the steel box 3 and the circular steel pipe concrete 4.
[0033] H-beam 5 is located inside the circular steel pipe 41.
[0034] In this embodiment, by setting H-beams 5 inside the circular steel tube concrete 4, the advantages of circular and square seismic isolation columns are combined, avoiding the situation of uneven stress that is easy to occur in square seismic isolation columns. Moreover, compared with traditional seismic isolation columns, the strength of the seismic isolation column body is improved, the cross-sectional size is effectively reduced, and the applicability of the seismic isolation column is improved.
[0035] like Figure 1 As shown, the steel box 3 includes a bottom steel plate 31 and side steel plates 32. One side of the bottom steel plate 31 is fixedly connected to the seismic isolation bearing 2, and the other side is welded to the circular steel pipe 41. The side steel plates 32 are welded around the bottom steel plate 31, and the adjacent two side steel plates 32 are welded to each other to form a box cavity. The circular steel pipe concrete 4 is located inside the box cavity.
[0036] The seismic isolation bearing 2 includes a lower connecting plate 21, an upper connecting plate 22 and a seismic isolation layer 23, with the two sides of the seismic isolation layer 23 being fixedly connected to the lower connecting plate 21 and the upper connecting plate 22 respectively.
[0037] A first high-strength threaded sleeve 101 is pre-embedded in the lower concrete foundation 1. A perforated steel plate 11 is provided on one side of the lower concrete foundation 1. The perforated steel plate 11 is fixedly connected to the first high-strength threaded sleeve 101 and communicates with the first high-strength threaded sleeve 101. A first high-strength bolt 51 is provided on the lower connecting plate 21. The first high-strength bolt 51 passes through the lower connecting plate 21 and the perforated steel plate 11 in sequence and is then threaded into the first high-strength threaded sleeve 101.
[0038] The steel box 3 has a second high-strength threaded sleeve 301 embedded in the concrete. The second high-strength threaded sleeve 301 is welded to the bottom steel plate 31 and is connected to the bottom steel plate 31. The upper connecting plate 22 is provided with a second high-strength bolt 52. The second high-strength bolt 52 passes through the upper connecting plate 22 and the bottom steel plate 31 and is then threaded into the second high-strength threaded sleeve 301.
[0039] The connection between the column and the foundation is called the column base. The column base transfers the column's load to the foundation, and then from the foundation to the ground. Depending on the type of load transferred and the connection method with the foundation, column bases are generally classified as rigid or hinged. Traditional rubber-insulated columns use rigid column bases, where the column and foundation are rigidly connected by bolts or welding, allowing no relative rotation. Under strong earthquakes, concrete-filled steel tubular column bases are prone to damage due to weld fractures, anchor bolt breakage, and the base plate being pulled apart at the anchor bolt edges.
[0040] Therefore, in this embodiment, by placing the bottom of the circular steel tube concrete 4 inside the steel box 3, the connection method of the column base can be optimized, making it less prone to weld and anchor bolt breakage. Furthermore, it increases the moment of inertia of the bottom section, which is beneficial for the isolation column to withstand axial and bending loads. High-strength bolts are used to connect the isolation bearing 2 to the lower concrete foundation 1 and the steel box 3 respectively. Simultaneously, under the action of the bottom steel plate 31 and the perforated steel plate 11, the stiffness and strength of the column base can be improved, preventing instability or tearing, effectively fulfilling the seismic isolation task of the structure, reducing the possibility of brittle failure, and improving the structural safety.
[0041] like Figure 1As shown, a first pre-embedded anchor bar 61 is fixedly installed at the end of the first high-strength threaded sleeve 101 away from the first high-strength bolt 51, and a second pre-embedded anchor bar 62 is fixedly installed at the end of the second high-strength threaded sleeve 301 away from the second high-strength bolt 52. Both the first pre-embedded anchor bar 61 and the second pre-embedded anchor bar 62 are L-shaped structures. Under the action of the first pre-embedded anchor bar 61 and the second pre-embedded anchor bar 62, the connection stability between the seismic isolation bearing 2 and the lower concrete foundation 1 and the circular steel pipe concrete 4 can be increased. In this embodiment, the first pre-embedded anchor bar 61 is welded to the first high-strength threaded sleeve 101, and the second pre-embedded anchor bar 62 is welded to the second high-strength threaded sleeve 301.
[0042] like Figure 1 and Figure 3 As shown, the vibration isolation layer 23 includes a lead core 231, a lower sealing plate 232, an upper sealing plate 233, and a protective outer layer 234.
[0043] A vibration isolation pad is alternately fitted with lead cores 231. The vibration isolation pad includes an inner steel plate 235 and an inner rubber 236, which are stacked alternately. Both ends of the lead cores 231 are fixedly connected to a lower sealing plate 232 and an upper sealing plate 233, respectively. The lower sealing plate 232 is fixedly connected to a lower connecting plate 21 by bolts, and the upper sealing plate 233 is fixedly connected to an upper connecting plate 22 by bolts. A protective outer layer 234 covers the vibration isolation pad and is fixedly connected to the outer walls of the inner steel plates 235 and inner rubber 236 of the lower and upper sealing plates 232 and 233, respectively. In this embodiment, both sides of the vibration isolation pad are inner rubber 236, and the inner rubber 236 is connected to the corresponding lower and upper sealing plates 232 and 233.
[0044] like Figure 2 As shown, a steel reinforcement cage 42 is provided inside the circular steel pipe concrete 4. The steel reinforcement cage 42 is located outside the H-beam 5, and the H-beam 5 is located inside the circular steel pipe 41.
[0045] The method for fabricating a circular steel-tube concrete seismic isolation column in this embodiment includes the following steps:
[0046] S1. H-beam 5 and circular steel pipe 41 are sequentially welded onto bottom steel plate 31. Then, side steel plates 32 are welded around the bottom steel plate 31, and adjacent side steel plates 32 are welded together. The second high-strength threaded sleeve 301 is placed inside the steel box 3, and the second high-strength threaded sleeve 301 is welded to the bottom steel plate 31. The second pre-embedded anchor bar 62 is welded to the second high-strength threaded sleeve 301.
[0047] S2. A first high-strength threaded sleeve 101 is pre-embedded in the lower concrete foundation 1. After the first high-strength threaded sleeve 101 is welded to the lower connecting plate 21, and the first pre-embedded anchor bar 61 is welded to the first high-strength threaded sleeve 101, the lower concrete foundation 1 is then poured.
[0048] S3. After passing the first high-strength bolt 51 through the lower connecting plate 21 and the perforated steel plate 11, the bolt is threaded into the first high-strength threaded sleeve 101 to fix the seismic isolation support 2 on the lower concrete foundation 1.
[0049] S4. The second high-strength bolt 52 passes through the upper connecting plate 22 and the bottom steel plate 31 and is then threaded into the second high-strength threaded sleeve 301 to fix the bottom steel plate 31 on the seismic isolation support 2.
[0050] S5. The reinforcing steel cage 42 is placed inside the circular steel pipe 41, and the reinforcing steel cage 42 is located outside the H-beam 5. The cage is placed inside the steel box 3, and then the circular steel pipe 41 and the steel box 3 are poured.
Claims
1. A circular steel-tube concrete seismic isolation column, characterized in that, It includes a lower concrete foundation (1), seismic isolation bearings (2), steel box (3), circular steel pipe concrete (4), and H-beams (5). The lower concrete foundation (1) is constructed by pouring concrete, and one side of the lower concrete foundation (1) is fixedly connected to the seismic isolation bearing (2); The side of the seismic isolation bearing (2) away from the lower concrete foundation (1) is fixedly connected to the steel box (3); The circular steel pipe concrete (4) is provided with a circular steel pipe (41), one end of the circular steel pipe concrete (4) is located inside the steel box (3), and concrete is poured between the steel box (3) and the circular steel pipe concrete (4). The H-beam (5) is located inside the circular steel pipe (41).
2. A circular steel-tube concrete seismic isolation column according to claim 1, characterized in that: The steel box (3) includes a bottom steel plate (31) and side steel plates (32). One side of the bottom steel plate (31) is fixedly connected to the seismic isolation support (2), and the other side is welded to the circular steel pipe (41). The side steel plates (32) are welded around the bottom steel plate (31), and two adjacent side steel plates (32) are welded to each other to form a box cavity. The circular steel pipe concrete (4) is located inside the box cavity.
3. A circular steel-tube concrete seismic isolation column according to claim 2, characterized in that: The seismic isolation bearing (2) includes a lower connecting plate (21), an upper connecting plate (22), and a seismic isolation layer (23). The two sides of the seismic isolation layer (23) are fixedly connected to the lower connecting plate (21) and the upper connecting plate (22), respectively. The lower concrete foundation (1) is pre-embedded with a first high-strength threaded sleeve (101). One side of the lower concrete foundation (1) is provided with a perforated steel plate (11). The first high-strength threaded sleeve (101) is welded to the perforated steel plate (11). The lower connecting plate (21) is provided with a first high-strength bolt (51). The first high-strength bolt (51) passes through the lower connecting plate (21) and the perforated steel plate (11) in sequence and then its threads are embedded into the first high-strength threaded sleeve (101). The steel box (3) has a second high-strength threaded sleeve (301) embedded in the concrete. The second high-strength threaded sleeve (301) is welded to the bottom steel plate (31). The upper connecting plate (22) is provided with a second high-strength bolt (52). The second high-strength bolt (52) passes through the upper connecting plate (22) and the bottom steel plate (31) and then its threads are embedded into the second high-strength threaded sleeve (301).
4. A circular steel-tube concrete seismic isolation column according to claim 3, characterized in that: The isolation layer (23) includes a lead core (231), a lower sealing plate (232), an upper sealing plate (233), and a protective outer layer (234). The lead core (231) is fitted with vibration isolation pads in alternating layers. Each vibration isolation pad includes an inner steel plate (235) and an inner rubber (236), and the inner steel plate (235) and the inner rubber (236) are stacked alternately. The two ends of the lead core (231) are fixedly connected to the lower sealing plate (232) and the upper sealing plate (233) respectively. The lower sealing plate (232) is fixedly connected to the lower connecting plate (21), and the upper sealing plate (233) is fixedly connected to the upper connecting plate (22). The protective outer layer (234) covers the vibration isolation pads, and the protective outer layer (234) is fixedly connected to the outer walls of the lower sealing plate (232), the upper sealing plate (233), the inner steel plate (235), and the inner rubber (236) respectively.
5. A circular steel-concrete composite seismic isolation column according to claim 3, characterized in that: The first high-strength threaded sleeve (101) is fixedly provided with a first pre-embedded anchor bar (61) at one end away from the first high-strength bolt (51), and the second high-strength threaded sleeve (301) is fixedly provided with a second pre-embedded anchor bar (62) at one end away from the second high-strength bolt (52), and both the first pre-embedded anchor bar (61) and the second pre-embedded anchor bar (62) are L-shaped structures.
6. A circular steel-tube concrete seismic isolation column according to claim 1, characterized in that: The circular steel pipe concrete (4) is provided with a steel reinforcement cage (42), which is located outside the H-beam (5).