Prestressed self-adapting efficient anti-seismic core tube steel frame

Abstract

The application relates to a prestressed self-adaptive high-efficiency anti-seismic core tube steel frame, and belongs to the technical field of high-rise building structure engineering, which comprises a core tube steel frame main body and a tensioning end, the core tube steel frame main body is built by a plurality of steel frame beams, and two symmetrically arranged steel strands are arranged between part of the steel frame beams and the tensioning end. The application has the beneficial effect that through the arrangement of the piezoelectric wind pressure sensor, the wind pressure change caused by dynamic loads such as strong wind can be captured in real time, and the data can be transmitted to the controller, and according to the load change signal, the hollow jack drives the steel strand to be secondarily tensioned or stress released, and through the synergistic effect of the anchor plate, the anchor clamp and the limiting plate, the tensioning force of the steel strand can be accurately adjusted, so that the problems of material fatigue caused by "load-hour stress redundancy" and lateral displacement caused by "insufficient stress when the load is beyond expectation" of the traditional static prestressed system are reduced, and the prestressed state of the core tube steel frame main body is always matched with the actual load.

Description

Technical Field

[0001] This application relates to the field of high-rise building structural engineering technology, and in particular to a prestressed adaptive high-efficiency seismic-resistant core tube steel frame. Background Technology

[0002] Prestressed steel structures refer to steel structures or components that have been prestressed using specific methods before a load is applied. The stress sign of this prestress is opposite to that of the stress caused by the load. When a load is applied, this ensures the safety and normal use of the structure.

[0003] A search revealed a Chinese patent (authorization announcement number CN114856209B) disclosing a high-precision tensioning system and method for prestressed steel structures. This system includes an upper reaction point, a tensioning device, and a lower reaction point. The upper reaction point is fixed to the steel structure to be tensioned, and the lower reaction point is fixed to a base platform. The upper and lower reaction points are connected by the tensioning device, which, from top to bottom, comprises a cable assembly, a support frame assembly, and a tensioning assembly. The cable assembly, from top to bottom, comprises an upper connecting end and steel strands. The support frame assembly, from top to bottom, comprises a tensioning end, a tie rod, and a bearing end, connected by the tie rod. The tensioning assembly, from top to bottom, comprises a tensioning nut, a jack, an adjusting nut, a screw, and a lower connecting end. While this patented technology can precisely control the counter-tensioning force and rigid deformation of the steel structure through precise adjustment of the tensioning length and tension force value via the tensioning device, it is not without its limitations.

[0004] However, the above-mentioned device still has some drawbacks in actual use. The most obvious one is that the jacks need to be disassembled after the steel structure is tensioned, which causes the steel frame to always be in a state of "constant prestress". It cannot adjust the stress distribution in real time according to the actual load changes such as strong winds, which easily leads to local stress concentration and makes it difficult to meet the stability requirements under dynamic loads. Utility Model Content

[0005] In view of the above-mentioned problems existing in the prior art, the main objective of this application is to provide a prestressed adaptive high-efficiency seismic-resistant core tube steel frame.

[0006] The technical solution of this application is as follows: a prestressed adaptive high-efficiency seismic-resistant core tube steel frame, including a core tube steel frame body and a tensioning end. The core tube steel frame body is constructed from multiple steel frame beams. Two symmetrically arranged steel strands are provided between some of the steel frame beams and the tensioning end. The steel strands are formed by twisting multiple steel wires. A tensioning component for adjusting the tension force of the steel strands is provided at the bottom end of the steel strands. A damping component for damping the vibration of the steel strands is provided at the end of the tensioning component near the tensioning end.

[0007] In a preferred embodiment, the tensioning assembly includes two pressure plates disposed at the bottom end of the steel strand, four tie rods fixedly connected between the two pressure plates, a hollow jack and a controller fixedly installed at the bottom of one of the pressure plates, and anchor plates provided at the bottom end of the steel strand and at the piston of the tie rods, with insertion holes for use with the steel strands opened inside the anchor plates.

[0008] By adopting the above technical solution, the tension of the steel strand can be precisely adjusted through the synergistic effect of the anchor plate, anchor clamp, and limiting plate.

[0009] In a preferred embodiment, the tensioning assembly further includes an anchor clamp embedded inside the insertion hole, and a limiting plate is provided on the side of the anchor plate near the anchor clamp. The steel strands are sequentially inserted into the insertion hole, the anchor clamp, and the limiting plate, and a piezoelectric wind pressure sensor is fixedly installed on the outside of the steel strands.

[0010] By adopting the above technical solution and setting up a piezoelectric wind pressure sensor, the wind pressure changes caused by dynamic loads such as strong winds can be captured in real time and the data can be transmitted to the controller. The controller then drives the hollow jack to perform secondary tensioning or stress release on the steel strand based on the load change signal.

[0011] In a preferred embodiment, the damping assembly includes a hook fixedly connected to the bottom of one of the pressure steel plates, and two steel columns are provided at the top of the tensioning end, with a damper connected between the steel columns and the hook.

[0012] By adopting the above technical solution and setting up a damper, the vibration energy caused by earthquakes or strong winds can be effectively absorbed.

[0013] In a preferred embodiment, the anchor plate is pressed against the pressure plate and the limiting plate, and the bottom end of the steel strand is provided with a tensioning end.

[0014] By adopting the above technical solution and setting the tensioning end, the end of the steel strand can be limited to prevent the steel strand from becoming disconnected during use.

[0015] In a preferred embodiment, two fixing seats are fixedly installed at both ends of the top of the tensioning end, and the fixing seats are rotatably connected to the corresponding steel columns.

[0016] By adopting the above technical solution, the fixed seat can be used as the tension reaction point.

[0017] In a preferred embodiment, the limiting plate is disposed between the hollow jack and the anchor plate, and the anchor plate is made of steel alloy.

[0018] By adopting the above technical solutions, the anchor plate has excellent fatigue resistance and service life.

[0019] Compared with the prior art, the advantages and positive effects of this application are as follows: 1. In this application, by setting up a piezoelectric wind pressure sensor, wind pressure changes caused by dynamic loads such as strong winds can be captured in real time and the data is transmitted to the controller. The controller drives the hollow jack to perform secondary tensioning or stress release on the steel strands according to the load change signal. Through the coordinated action of the anchor plate, anchor clamp and limiting plate, the tension of the steel strands is precisely adjusted. The above structure can reduce the problems of "stress redundancy leading to material fatigue when the load is small and insufficient stress leading to lateral displacement when the load exceeds expectations" in the traditional static prestressed system. It can ensure that the prestress state of the core tube steel frame is always matched with the actual load, effectively avoid local stress concentration, significantly improve the lateral displacement stability of super high-rise buildings under complex dynamic loads such as wind vibration, and greatly reduce the risk of structural instability.

[0020] 2. In this application, the damper can effectively absorb the vibration energy caused by earthquakes or strong winds, thereby reducing the damage of vibration to steel frame beams and joints. Attached Figure Description

[0021] Figure 1 This application provides a three-dimensional schematic diagram of a prestressed adaptive high-efficiency seismic-resistant core tube steel frame; Figure 2 This application provides a schematic diagram of the main structure of a prestressed adaptive high-efficiency seismic-resistant core tube steel frame. Figure 3 A partial schematic diagram of a prestressed adaptive high-efficiency seismic-resistant core tube steel frame is provided for this application; Figure 4 This application provides a schematic diagram of a tensioning assembly for a prestressed adaptive high-efficiency seismic-resistant core tube steel frame; Figure 5 This application provides a schematic diagram of a damping component for a prestressed adaptive high-efficiency seismic-resistant core tube steel frame.

[0022] Legend: 1. Core tube steel frame main body; 2. Steel frame beam; 3. Vibration damping component; 31. Steel column; 32. Damper; 33. Hook; 4. Steel strand; 5. Tensioning component; 51. Tie rod; 52. Anchor plate; 53. Anchor clamp; 54. Limiting plate; 55. Insertion hole; 56. Piezoelectric wind pressure sensor; 57. Controller; 58. Pressure plate; 59. Hollow jack; 6. Tensioning end; 7. Fixing seat. Detailed Implementation

[0023] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] Reference Figure 1-5 A prestressed adaptive high-efficiency seismic-resistant core tube steel frame includes a core tube steel frame body 1 and a tensioning end 6. The core tube steel frame body 1 is constructed from multiple steel frame beams 2. Two symmetrically arranged steel strands 4 are set between some of the steel frame beams 2 and the tensioning end 6. The steel strands 4 are formed by twisting multiple steel wires. A tensioning component 5 for adjusting the tension of the steel strands 4 is set at the bottom of the steel strands 4. A damping component 3 for damping the steel strands 4 is set at the end of the tensioning component 5 near the tensioning end 6.

[0025] Specifically, the tensioning assembly 5 includes two pressure plates 58 set at the bottom of the steel strand 4, and four tie rods 51 are fixedly connected between the two pressure plates 58. A hollow jack 59 and a controller 57 are fixedly installed at the bottom of one of the pressure plates 58. Anchor plates 52 are provided at the bottom of the steel strand 4 and at the piston of the tie rods 51. The anchor plates 52 are provided with insertion holes 55 for use with the steel strand 4. Through the setting of piezoelectric wind pressure sensor 56, wind pressure changes caused by dynamic loads such as strong winds can be captured in real time and the data is transmitted to the controller 57. The controller 57 drives the hollow jack 59 to perform secondary tensioning or stress release on the steel strand 4 according to the load change signal. Through the synergistic action of the anchor plates 52, anchor clamps 53 and limiting plates 54, the tension force of the steel strand 4 is precisely adjusted. The above structure can reduce the "stress redundancy leading to material fatigue when the load is small and insufficient stress leading to lateral displacement when the load exceeds expectations" of the traditional static prestressing system. The problem is that the prestress state of the core tube steel frame 1 always matches the actual load, effectively avoiding local stress concentration, significantly improving the lateral stability of the super high-rise building under complex dynamic loads such as wind vibration, and greatly reducing the risk of structural instability. The tensioning component 5 also includes an anchor clamp 53 embedded in the insertion hole 55. A limit plate 54 is set on the side of the anchor plate 52 near the anchor clamp 53. The steel strands 4 are sequentially inserted into the insertion hole 55, the anchor clamp 53 and the limit plate 54. A piezoelectric wind pressure sensor 56 is fixedly installed on the outside of the steel strands 4. The damping component 3 includes a hook 33 fixedly connected to the bottom of one of the pressure steel plates 58. Through the setting of the damper 32, the vibration energy caused by earthquakes or strong winds can be effectively absorbed, and the horizontal impact force can be converted into the buffer force of the damper 32 to reduce the damage of vibration to the steel frame beam 2 and the node. Two steel columns 31 are provided at the top of the tensioning end 6. A damper 32 is hung between the steel column 31 and the hook 33.

[0026] Specifically, the anchor plate 52 is pressed between the pressure steel plate 58 and the limiting plate 54. The bottom end of the steel strand 4 is provided with a tensioning end 6. The tensioning end 6 can limit the end of the steel strand 4 to prevent the steel strand 4 from disengaging during use. Two fixing seats 7 are fixedly installed at both ends of the top of the tensioning end 6. The fixing seats 7 are rotatably connected to the corresponding steel column 31. The limiting plate 54 is set between the hollow jack 59 and the anchor plate 52. The anchor plate 52 is made of steel alloy material, which has excellent fatigue resistance and service life, reducing the frequency of component replacement.

[0027] Working principle: First, steel strands 4 are installed at the main nodes within the core tube steel frame 1. The steel wires at the ends of the steel strands 4 are sequentially inserted into the anchor plate 52, insertion hole 55, anchor clamp 53, and limiting plate 54, and then fixed at the ends of the steel strands 4 using tensioning end 6. Subsequently, a damper 32 is installed between the hook 33 and the steel column 31. During daily use, the piezoelectric wind pressure sensor 56 (model: S33100A) can be set to capture wind pressure changes caused by dynamic loads such as strong winds in real time, and... The data is transmitted to the controller 57, which drives the hollow jack 59 (model: RRH-307) to perform secondary tensioning or stress release on the steel strand 4 according to the load change signal. Through the coordinated action of the anchor plate 52, the anchor clamp 53 and the limiting plate 54, the tension of the steel strand 4 is precisely adjusted. The damper 32 can effectively absorb the vibration energy caused by earthquakes or strong winds, and thus convert the horizontal impact force into the buffering force of the damper 32 to reduce the damage of vibration to the steel frame beam 2 and the nodes.

[0028] The above are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A prestressed adaptive high-efficiency seismic-resistant core tube steel frame, comprising a core tube steel frame body (1) and a tensioning end (6), characterized in that: The core tube steel frame body (1) is constructed from multiple steel frame beams (2). Two symmetrically arranged steel strands (4) are provided between some of the steel frame beams (2) and the tensioning end (6). The steel strands (4) are formed by twisting multiple steel wires. A tensioning assembly (5) for adjusting the tension of the steel strands (4) is provided at the bottom of the steel strands (4). A damping assembly (3) for damping the steel strands (4) is provided at the end of the tensioning assembly (5) near the tensioning end (6).

2. The prestressed adaptive high-efficiency seismic-resistant core tube steel frame according to claim 1, characterized in that: The tensioning assembly (5) includes two pressure plates (58) set at the bottom of the steel strand (4). Four tie rods (51) are fixedly connected between the two pressure plates (58). A hollow jack (59) and a controller (57) are fixedly installed at the bottom of one of the pressure plates (58). Anchor plates (52) are provided at the bottom of the steel strand (4) and at the piston of the tie rod (51). An insertion hole (55) for use with the steel strand (4) is opened inside the anchor plate (52).

3. The prestressed adaptive high-efficiency seismic-resistant core tube steel frame according to claim 2, characterized in that: The tensioning assembly (5) also includes an anchor clamp (53) embedded in the socket (55). A limiting plate (54) is provided on the side of the anchor plate (52) near the anchor clamp (53). The steel strands (4) are sequentially inserted into the socket (55), the anchor clamp (53) and the limiting plate (54). A piezoelectric wind pressure sensor (56) is fixedly installed on the outside of the steel strands (4).

4. The prestressed adaptive high-efficiency seismic-resistant core tube steel frame according to claim 3, characterized in that: The shock-absorbing component (3) includes a hook (33) fixedly connected to the bottom of one of the pressure steel plates (58), and two steel columns (31) are provided at the top of the tensioning end (6), with a damper (32) connected between the steel column (31) and the hook (33).

5. A prestressed adaptive high-efficiency seismic-resistant core tube steel frame according to claim 4, characterized in that: The anchor plate (52) is pressed between the pressing steel plate (58) and the limiting plate (54), and the bottom end of the steel strand (4) is provided with a tensioning end (6).

6. A prestressed adaptive high-efficiency seismic-resistant core tube steel frame according to claim 5, characterized in that: Two fixed seats (7) are fixedly installed at both ends of the top of the tensioning end (6), and the fixed seats (7) are rotatably connected to the corresponding steel column (31).

7. A prestressed adaptive high-efficiency seismic-resistant core tube steel frame according to claim 3, characterized in that: The limiting plate (54) is set between the hollow jack (59) and the anchor plate (52), and the anchor plate (52) is made of steel alloy.

Images