Steel pipe column and concrete beam joint bending resistance detection device and well type double beam structure

Abstract

The present application relates to the technical field of building structure detection, and provides a steel pipe column and concrete beam joint bending resistance detection device and a well type double beam structure. The steel pipe column is provided with a bending resistance assembly connected with the concrete beam. The bending resistance assembly comprises an upper bending resistance bracket and a lower bending resistance bracket. The bending resistance detection device comprises a magnetic detection assembly arranged between the upper bending resistance bracket and the lower bending resistance bracket and a magnetic sensing assembly matched arranged in the steel pipe column. The magnetic detection assembly converts the bending deformation of the bending resistance assembly relative to the steel pipe column into a magnetic detection signal, and the magnetic sensing assembly acquires the magnetic detection signal. The bending state or the bending resistance bearing capacity of the beam column joint is obtained according to the magnetic detection signal. The device can realize the monitoring of the stress state of the steel pipe column and the concrete beam joint, and early warning of potential safety hazards of the beam column joint. The well type double beam structure applies the bending resistance detection device to detect the bending state or the bending resistance bearing capacity, and has the functions of high bending resistance and bending state detection, thereby ensuring the safe use of the building structure.

Description

Technical Field

[0001] This invention relates to the field of building structure testing technology, specifically a bending resistance testing device for steel pipe column and concrete beam joint and a well-type double beam structure. Background Technology

[0002] In traditional building structures, the connection between steel pipe columns and reinforced concrete beams is usually achieved through simple welding or bolting, which has limited strength and lacks the ability to monitor the structural stress state. Especially in large-span or high-rise buildings, the bending and shear resistance at the steel pipe column-concrete beam joint is crucial. However, existing technologies often struggle to effectively monitor potential bending deformation at the joint, making it difficult to detect structural safety hazards in a timely manner and hindering long-term structural health monitoring and safe use. Therefore, it is necessary to propose a bending resistance detection device for steel pipe column-reinforced concrete beam joints with bending deformation monitoring capabilities, as well as a well-type double-beam structure for steel pipe columns and reinforced concrete beams that combines high bending resistance and bending deformation monitoring functions. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a bending resistance testing device for steel pipe column and concrete beam joint and a well-type double beam structure.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows:

[0005] In a first aspect, the present invention provides a bending resistance testing device for a steel pipe column and a concrete beam joint. The steel pipe column is provided with a bending resistance component and is fixedly connected to the concrete beam. The bending resistance component includes an upper bending resistance bracket and a lower bending resistance bracket arranged opposite to each other. The bending resistance testing device includes a magnetic detection component disposed between the upper and lower bending resistance brackets and a magnetic sensing component disposed inside the steel pipe column and matched with the magnetic detection component. The magnetic detection component converts the bending deformation of the bending resistance component relative to the steel pipe column into a magnetic detection signal, and the magnetic sensing component acquires the magnetic detection signal. The bending state or bending bearing capacity of the beam-column joint is obtained based on the magnetic detection signal.

[0006] Preferably, the magnetic detection assembly includes a detection tube arranged perpendicular to the outer wall of the steel pipe column, a guide rod provided at one end of the detection tube near the steel pipe column, and a hollow detection magnetic block disposed inside the detection tube;

[0007] The end of the detection magnetic block away from the steel pipe column is provided with a first spring that connects to the inner wall of the detection tube. The end of the detection magnetic block near the steel pipe column is provided with a pull rope. The pull rope first extends toward one end of the steel pipe column, then goes around the guide rod and folds back, then passes through the detection magnetic block and extends toward the end away from the steel pipe column to connect with the other end of the detection tube. Both the pull rope and the first spring are in a taut state, so that the detection magnetic block is suspended in the detection tube.

[0008] The end of the pull rope away from the steel pipe column is also equipped with a hook blade. The hook blade can convert the relative bending deformation between the upper and lower anti-bending brackets into a shearing action on the pull rope. When the pull rope is subjected to the shearing action of the hook blade, the detection magnetic block moves to the end away from the steel pipe column and generates a magnetic detection signal.

[0009] Preferably, the hook blade includes an upper hook blade and a lower hook blade, each having a cutting hole at one end that can shear the pull rope. The other end of the lower hook blade is fixed to the end of the lower anti-bending bracket away from the steel pipe column, and the other end of the upper hook blade is provided with a second spring. The upper end of the second spring is provided with a limiting rope, which passes through the end of the upper anti-bending bracket away from the steel pipe column and connects to the steel pipe column. The upper anti-bending bracket is provided with a limiting baffle extending to the middle of the second spring. When relative bending deformation occurs between the upper and lower anti-bending brackets, the upper and lower hook blades undergo relative displacement in the same or opposite directions and shear the pull rope. The detection tube is provided with a channel for the upper and lower hook blades to move.

[0010] Preferably, the magnetic sensing assembly includes a mounting base and a magnetic sensor. The mounting base is located inside the steel pipe column, and the magnetic sensor is mounted on the mounting base and aligned with the detection magnetic block in the magnetic detection assembly. It is used to detect the magnetic field strength of the detection magnetic block and obtain a magnetic detection signal including the bending deformation of the concrete beam. The magnetic sensor can be a triaxial magnetometer.

[0011] Preferably, the pull rope is made of fiberglass.

[0012] Preferably, the detection tube is made of non-metallic material or non-magnetic metallic material; plastic is preferred as the non-metallic material.

[0013] Preferably, the guide rod is arranged along the diameter of the detection tube; the detection magnetic block is hollow tubular; and the detection tube is provided with a positioning plate connected to the end of the first spring away from the steel pipe column.

[0014] Preferably, the upper and lower hooks, the second spring, and the limiting rope are protected by a protective shell to prevent them from being encased in concrete and thus unable to perform their detection function.

[0015] Preferably, the upper anti-bending bracket is a T-shaped or cross-shaped steel component, arranged symmetrically in the upper and lower parts.

[0016] Secondly, the present invention provides a well-type double-beam structure of steel pipe column and concrete beam, including steel pipe column and concrete well-type double beam. Several sets of bending-resistant components are uniformly arranged along the circumferential direction on the outer wall of the steel pipe column. The bending-resistant components are fixedly connected to the steel reinforcement frame in the concrete well-type double beam. A magnetic detection component is provided between the upper and lower bending-resistant brackets of each set of bending-resistant components. A magnetic sensing component matching the magnetic detection component is provided inside the steel pipe column. The bending state or bending bearing capacity of the joint between the steel pipe column and the concrete well-type double beam is obtained according to the magnetic detection signal. Shear-resistant brackets are also provided between two adjacent sets of bending-resistant components on the outer wall of the steel pipe column.

[0017] Preferably, the bending-resistant components are at least 4 groups, generally 4 groups or 8 groups; when there are 4 groups, it is preferable that each group of bending-resistant components is parallel to the beam body of the concrete well-type double beam; when there are 8 groups, it is preferable that 4 of the bending-resistant components are parallel to the beam body of the concrete well-type double beam.

[0018] Compared with the prior art, the beneficial effects of the technical solution of the present invention are as follows:

[0019] 1) By combining the magnetic detection component and the magnetic sensing component, the bending deformation of the bending component can be detected, and the magnetic detection signal can be converted into structural bending deformation data. The bending state or bending bearing capacity of the beam-column joint can be obtained, realizing the monitoring of the stress state of the joint and providing early warning of potential safety hazards of the beam-column joint.

[0020] 2) The linkage design of the hook knife, detection magnetic block, pull rope, and first spring can automatically trigger the magnetic detection signal when the bending component is subjected to bending moment by the concrete well-type double beam and undergoes bending deformation. No external power supply is required, and the structure is simple and reliable. The first spring and guide rod ensure that the detection magnetic block is in a stable suspended state inside the detection tube, avoiding interference from the detection tube to the detection magnetic block and improving the accuracy of monitoring. The sleeve protects the exposed components in the magnetic detection component from being encased in concrete and losing their original function, ensuring the effective detection of the magnetic detection component.

[0021] 3) The symmetrically arranged bending corbels and the well-type double beam structure form a multi-directional bending resistance system. Combined with the shear corbel design, it significantly improves the bending and shear bearing capacity of the joint area, which is suitable for building needs in high-load or earthquake-prone areas. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the well-type double-beam structure of steel pipe columns and concrete beams of the present invention.

[0023] Figure 2 This is an isometric schematic diagram of the steel pipe column bending resistance component and shear resistance bracket of the present invention.

[0024] Figure 3This is an isometric view of the bending resistance component and magnetic detection component of the present invention. Figure 1 .

[0025] Figure 4 This is a front view schematic diagram of the anti-bending component and the magnetic detection component of the present invention.

[0026] Figure 5 This is an isometric view of the bending resistance component and magnetic detection component of the present invention. Figure 2 .

[0027] Figure 6 This is a top view of the anti-bending component and the magnetic sensing component of the present invention.

[0028] Figure 7 For the present invention Figure 6 A schematic diagram of the AA section.

[0029] Figure 8 This is a schematic diagram of the hook blade of the present invention.

[0030] Figure 9 For the present invention Figure 7 An enlarged schematic diagram of part B of the structure.

[0031] Among them, 1. Steel pipe column; 2. Upper anti-bending bracket; 3. Lower anti-bending bracket; 4. Hook cutter; 5. Concrete well-type double beam; 6. Detection pipe; 7. Detection magnetic block; 8. Pull rope; 9. Guide rod; 10. First spring; 11. Second spring; 12. Limiting rope; 13. Limiting baffle; 14. Fixing seat; 15. Magnetic sensor; 16. Positioning plate; 17. Shear-resistant bracket; 41. Upper hook cutter; 42. Lower hook cutter. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Example 1;

[0036] Please see Figure 2-6 A bending resistance testing device for a steel pipe column and concrete beam joint is disclosed. The steel pipe column 1 is equipped with a bending resistance component fixedly connected to the concrete beam. The bending resistance component includes an upper bending bracket 2 and a lower bending bracket 3 arranged opposite to each other. The bending resistance testing device includes a magnetic detection component located between the upper and lower bending brackets 2 and 3, and a magnetic sensing component located inside the steel pipe column 1 and matched with the magnetic detection component. The magnetic detection component converts the bending deformation of the bending resistance component relative to the steel pipe column 1 into a magnetic detection signal. The magnetic sensing component acquires the magnetic detection signal and obtains the bending state or bending bearing capacity of the beam-column joint based on the magnetic detection signal. The bending state refers to the bending moment or bending moment distribution experienced by the concrete beam.

[0037] The steel pipe column 1 is usually set vertically. The upper bending bracket 2 and the lower bending bracket 3 can be fixed to the circumference of the steel pipe column 1 by welding or high-strength bolts. The concrete beam, the upper bending bracket 2 and the lower bending bracket 3 are set horizontally. When the end of the concrete beam is subjected to bending moment, the concrete beam transfers the bending load to the steel pipe column 1 through the bending components. The steel pipe column 1 forms a rigid node with the steel reinforcement frame and the filling concrete of the concrete beam to disperse the stress.

[0038] Please see Figure 7-9Specifically, the magnetic detection assembly is located between the upper anti-bending bracket 2 and the lower anti-bending bracket 3. The magnetic detection assembly includes a detection tube 6 perpendicular to the outer wall of the steel pipe column 1, meaning the detection tube 6 is perpendicular to the length direction of the steel pipe column 1. The detection tube 6 is horizontally positioned and can be bonded (non-metallic) or welded (non-magnetic metal) to connect its end to the outer wall of the steel pipe column 1. Inside the detection tube 6 is a guide rod 9 located at the end of the detection tube 6 closest to the steel pipe column 1. A hollow detection magnetic block 7 is also disposed inside the detection tube 6. At the end of the detection magnetic block 7 furthest from the steel pipe column 1, a first spring 10 is provided, which connects to a positioning plate 16 fixedly disposed inside the detection tube 6. The positioning plate 16 serves as a platform connecting the end of the first spring 10 furthest from the steel pipe column 1 to the detection tube 6. At the end of the detection magnetic block 7 closest to the steel pipe column 1, a pull rope 8 is provided. The pull rope 8 first extends towards one end of the steel pipe column 1, then around the guide rod 9 and folds back, then passes through the detection magnetic block 7 and extends towards the end away from the steel pipe column 1 to connect with the other end of the detection tube 6. The pull rope 8 also needs to pass through the first spring 10. Both the pull rope 8 and the first spring 10 are in a taut state, so that the detection magnetic block 7 is suspended in the detection tube 6 and located between the pull rope 8 and the first spring 10 (the connection point between the pull rope 8 and the detection magnetic block 7 is on the same side as the connection point between the first spring 10 and the detection magnetic block 7). The end of the pull rope 8 away from the steel pipe column 1 is also provided with a hook 4. The hook 4 can convert the relative bending deformation between the upper anti-bending bracket 2 and the lower anti-bending bracket 3 into a shearing action on the pull rope 8. When the pull rope 8 is subjected to the shearing action of the hook 4, the detection magnetic block 7 moves towards the end away from the steel pipe column 1, generating a magnetic detection signal.

[0039] The guide rod 9 is positioned on the diameter of the detection tube 6. The detection magnetic block 7 can move along the length of the detection tube 6 (i.e., horizontally). The detection tube 6 is made of non-metallic material or a non-magnetic metal other than iron, cobalt, or nickel; plastic is preferred for non-metallic materials. The detection tube 6 does not affect the movement of the detection magnetic block 7 or the monitoring accuracy of the monitoring module, and also has suitable strength. The detection magnetic block 7 is a hollow tube, with its outer diameter smaller than the inner diameter of the detection tube 6. The interior of the detection magnetic block 7 has space for the pull rope 8 to pass through, preventing the detection magnetic block 7 from contacting the detection tube 6 or the pull rope 8. A connector for connection to the pull rope 8 or the first spring 10 can be provided at the end of the detection magnetic block 7. The end of the detection magnetic block 7 closest to the steel pipe column 1 is subjected to the tension of the pull rope 8, while the end furthest from the steel pipe column 1 is subjected to the tension of the first spring 10. Under normal circumstances, the tensions of the two are balanced. The first spring 10 is a tension spring and can be made of stainless steel. More specifically, initially, the first spring 10 and the pull rope 8 reach a large tension and remain in balance, and the first spring 10 and the pull rope 8 produce the same deformation. When the hook 4 shears the pull rope 8 at the end away from the steel pipe column 1, the pull rope 8 subjected to shearing will be cut off. As a result, the first spring 10 loses tension and gradually rebounds to return to its initial state. The detection magnetic block 7 will gradually move towards the end away from the steel pipe column 1 inside the detection tube 6, which is also towards the direction away from the magnetic induction component. The detection magnetic block 7 itself generates a magnetic field. When the magnetic field it carries moves, the magnetic field strength detected by the magnetic induction component at the corresponding position will gradually decrease. Therefore, the smaller the magnetic field strength, the greater the bending deformation of the anti-bending component.

[0040] A positioning plate 16 is provided on the inner side of the detection tube 6. The first spring 10 is connected to the positioning plate 16 and is in a tensioned state. When the pull rope 8 is cut, the detection tube 6 moves away from the magnetic detection component under the tension of the first spring 10, so as to facilitate the detection of the change in magnetic field strength at its location by the magnetic detection component.

[0041] Please see Figure 7-9Furthermore, the hooks 4 are an upper hook 41 and a lower hook 42, which are generally aligned in a straight line. The pull rope 8 passes horizontally through the cut holes of the upper hook 41 and the lower hook 42, and the cut holes can shear the pull rope 8. The other end of the lower hook 42 is directly and fixedly connected to the end of the lower anti-bending bracket 3 away from the steel pipe column 1. The other end of the upper hook 41 is provided with a second spring 11, and the upper end of the second spring 11 is provided with a limiting rope 12. The limiting rope 12 passes through the end of the upper anti-bending bracket 2 away from the steel pipe column 1 and is connected to the steel pipe column 1. The bottom of the upper anti-bending bracket 2 is provided with a limiting baffle 13, which extends into the middle of the second spring 11 and can produce a certain degree of bending deformation. When relative bending deformation occurs between the upper anti-bending bracket 2 and the lower anti-bending bracket 3, relative displacement occurs between the upper hook blade 41 and the lower hook blade 42 in the same or opposite direction, and shearing action is generated on the pull rope 8; the detection tube 6 is provided with a channel for the upper hook blade 41 and the lower hook blade 42 to move.

[0042] The hook 4 and the detection tube 6 can undergo relative displacement. The pull rope 8 is used to keep the upper hook 41 in a fixed position. When the upper anti-bending bracket 2 and the lower anti-bending bracket 3 deform downward or change position, the hook 4 and the pull rope 8 will undergo relative displacement, thereby causing the pull rope 8 to cut. The pull rope is made of fiberglass rope, or other materials with high strength, high modulus and low elongation.

[0043] The shearing principle of the upper hook blade 41 and the lower hook blade 42 on the pull rope 8 is described in detail below:

[0044] 1) When the upper anti-bending bracket 2 bends downward and the lower anti-bending bracket 3 remains basically fixed, although the limiting rope 12 restricts the movement of the upper part of the second spring 11, the downward bending of the upper anti-bending bracket 2 will still cause the limiting baffle 13 to move downward a certain distance (the limiting baffle 13 is dominant). Thus, the limiting baffle 13 presses the upper hook 41 downward through the lower part of the second spring 11, while the lower hook 42 remains stationary. Therefore, the upper hook 41 and the lower hook 42 generate relative displacement in the same direction (towards the pull rope 8). A shearing force will be generated between the upper part of the cut hole of the upper hook 41 and the lower part of the cut hole of the lower hook 42. The shearing force between the two hooks 4 will cut the pull rope 8.

[0045] 2) When the upper anti-bending bracket 2 remains basically fixed and the lower anti-bending bracket 3 bends downward, the upper hook 41 initially remains basically stationary, while the lower anti-bending bracket 3 drives the lower hook 42 to move downward. Therefore, the upper hook 41 and the lower hook 42 generate a reverse relative displacement (away from the pull rope 8). Although the upper hook 41 is connected to the second spring 11, the displacement of the lower hook 42 plays a dominant role. Thus, a shearing force is generated between the upper half of the cut hole of the lower hook 42 and the lower half of the cut hole of the upper hook 41. The shearing force between the two hooks 4 will also cut the pull rope 8.

[0046] 3) When the upper anti-bending bracket 2 and the lower anti-bending bracket 3 bend downwards simultaneously, due to the action of the limiting rope 12 and the second spring 11, the upper hook 41 has a delay when it moves downwards. The upper part of the second spring 11 is stretched first, so that the falling height of the upper hook 41 is different from that of the lower hook 42. The limiting rope 12 restricts the falling height that the lower hook 42 should have produced. The upper hook 41 and the lower hook 42 will still produce a relative displacement in the opposite direction (away from the pull rope 8). The upper part of the cut hole of the lower hook 42 and the lower part of the cut hole of the upper hook 41 will produce a shearing force, thereby cutting the pull rope 8.

[0047] The hook cutter should be positioned at the end of the bending-resistant component furthest from the steel pipe column 1. The extension length of the bending-resistant component is usually related to the diameter of the steel pipe column 1 and the connection of the concrete beam joint, and can be determined according to existing design specifications. The longer the bending-resistant component, the easier it is for the tie rope 8 to be cut, and the more sensitive the bending-resistant testing device is to bending deformation. Conversely, the shorter the bending-resistant component, the less likely the tie rope 8 is to be cut, and the more sensitive the bending-resistant testing device is to be bending deformation. To avoid the hook cutter cutting the tie rope prematurely, the bending deformation of the bending-resistant component under corresponding load conditions can be determined through indoor tests. Then, the optimal distance between the blade of the hook cutter and the tie rope 8 can be determined, ensuring a certain safety distance between the cutter hole and the tie rope 8. This safety distance matches the complete deformation of the bending-resistant component. The tie rope 8 will only be cut when the bending-resistant component reaches a certain bending deformation.

[0048] Please see Figure 7 The magnetic sensing assembly includes a mounting base 14 and a magnetic sensor 15. The mounting base 14 is disposed inside the steel pipe column 1, and the magnetic sensor 15 is mounted on the mounting base 14, facing the detection magnetic block 7 so that the magnetic sensor 15 and the detection magnetic block 7 are on the same horizontal line. The magnetic sensor 15 is used to detect the magnetic field strength of the detection magnetic block. The magnetic sensor can use a triaxial magnetometer. The detection data is transmitted to the building integrated detection system through the built-in circuit. The detection system interprets the magnetic detection signal to obtain the bending state of the beam-column joint.

[0049] Please see Figure 2The upper bending bracket 2 and lower bending bracket 3 are T-shaped or cross-shaped steel components, and preferably arranged symmetrically. Specifically, taking a T-shaped steel component as an example, the main structure of the bending bracket includes flange plates and ribs. The ribs of the upper bending bracket 2 face downwards, and the ribs of the lower bending bracket 3 face upwards. One end of the lower hook blade 42 is fixed to the rib plate of the lower anti-bending bracket 3. The shearing directions of the upper hook blade 41 and the lower hook blade 42 are kept in a straight line. The second spring 11 installed on the upper part of the lower hook blade 42 also corresponds to the rib plate of the upper anti-bending bracket 2. Then, a through hole is provided on the flange plate of the upper anti-bending bracket 2 for the limiting rope 12 to pass through. The position of the through hole is close to the rib plate, so that the upper hook blade 41, the second spring 11, and the limiting rope 12 are partially aligned. The lower end of the limiting rope 12 extends to the rib plate and is connected to the second spring 11. The limiting baffle 13 extends from the rib plate to the middle of the second spring 11. An opening is also provided at the farthest end of the flange plate, so that the rib plate and the flange plate have better integrity. The specific size selection of the flange plate and the rib plate is not the focus of this invention. Those skilled in the art can obtain it based on engineering experience or laboratory tests. The detection tube 6 is preferably located on the symmetrical plane of the upper anti-bending bracket 2 and the lower anti-bending bracket 3.

[0050] To ensure the normal operation of the magnetic detection component in the concrete beam, a protective shell (not shown in the figure) is required to protect the upper hook 41, lower hook 42, second spring 11, and limiting rope 12. This prevents them from being encased and constrained by the concrete, thus hindering their detection function. The protective shell can be designed according to the shape of the upper hook 41, lower hook 42, and detection tube 6. It is best to use two half-shells spliced ​​together to form the protective shell, so that the upper hook 41 and lower hook 42 can generate relative displacement between themselves and the concrete beam and the bending-resistant component. The protective shell can be made of plastic. The protective shell can prevent concrete from seeping into the working range of the above structure during pouring and can deform together with the bending-resistant component.

[0051] Taking the joint between steel pipe column 1 and concrete well-type double beam 5 as an example, the method of using the bending resistance testing device in this embodiment is as follows:

[0052] 1) The steel pipe column 1 is made of Q390C high-strength seamless steel pipe with a diameter ≥400mm and a wall thickness ≥12mm, which conforms to GB / T8162-2018 standard. At the same time, the upper anti-bending bracket 2 and the lower anti-bending bracket 3 can be welded to the outer wall of the steel pipe column 1 by bevel welding.

[0053] 2) The anti-bending component can be connected to the steel pipe column 1 at the factory. After the connection is completed, the magnetic detection component is assembled. The upper hook 41 and lower hook 42, the second spring 11, and the limiting rope 12 in the magnetic detection component are all equipped with protective shells. It is also necessary to avoid accidental contact with the pull rope 8. At the same time, other tools are needed to limit the upper hook 41. After assembly, it is transported to the construction site.

[0054] 3) A detachable pin block is used to limit the lower end of the connection between the upper hook 41 and the second spring 11;

[0055] 4) During installation, first hoist the steel pipe column 1 onto the foundation embedded parts, correct it and then weld it in place. Release the limit on the upper hook 41, and then erect the steel reinforcement frame of the concrete well-type double beam 5 on the basis of the steel pipe column 1 and the anti-bending component. Connect the steel reinforcement frame of the concrete well-type double beam 5 to the anti-bending component by binding or welding.

[0056] 5) C40 micro-expansion concrete can be used for the concrete well-type double beam 5. It should be poured in layers (each layer ≤500mm) and compacted by immersion vibration. Before pouring, the magnetic sensor 15 circuit should be protected by a conduit and the magnetic sensor 15 should be connected to an external data acquisition box. The signal stability should be tested by powering on.

[0057] 6) When the upper anti-bending bracket 2 or the lower anti-bending bracket 3 bends downward, the upper anti-bending bracket 2 or the lower anti-bending bracket 3 will drive one of the hooks 4 to move downward, so that the two hooks 4 will have relative displacement, thereby cutting the pull rope 8. The first spring 10 will rebound, and the detection magnetic block 7 will move away from the magnetic sensor 15 under the action of the first spring 10. The magnetic sensor 15 can detect the change in magnetic force and transmit the signal to the external data acquisition box.

[0058] 7) When the upper anti-bending bracket 2 and the lower anti-bending bracket 3 bend downwards at the same time, they will drive the two hooks 4 to move downwards. Due to the action of the second spring 11, the upper hook 41 moves downwards a relatively small distance, while the lower hook 42 moves downwards a larger distance, causing a relative displacement between the two hooks 4, thereby cutting the pull rope 8. The detection magnetic block 7 will move away from the magnetic sensor 15 under the action of the first spring 10, and obtain a magnetic detection signal.

[0059] In this embodiment, a magnetic detection component generates a magnetic detection signal containing bending deformation information of the concrete beam and the bending-resistant component. A magnetic sensing component acquires the magnetic detection signal and converts it into bending deformation data, thus obtaining the bending state or bending capacity of the beam-column joint. Through the cooperation of the magnetic detection component and the magnetic sensing component, this invention can detect the bending deformation of the bending-resistant component (representing the bending deformation of the concrete beam) in real time, enabling monitoring of the stress state of the joint and providing early warning of potential safety hazards at the beam-column joint. When the device is used for testing, it can test the bending state and bending capacity of the beam-column joint. Furthermore, it can calibrate the bending detection device based on the magnitude of the test bending moment, the displacement distance of the detection magnetic block 7, or the intensity of the magnetic detection signal, thereby selecting the first spring 10 and the pull rope 8 and setting the distance between the hook cutter hole and the pull rope 8. When the device is used in actual engineering, the actual bending state of the beam-column joint can be determined based on the calibration results, thereby assessing the safety and stability of the beam-column joint and providing early warning of potential safety hazards at the beam-column joint. When the pull rope 8 is detected to be cut, it means that the joint between the steel pipe column and the concrete beam has reached the intended bending state. Based on this, the staff can reinforce the structure or provide early warning to avoid safety risks and prevent casualties and property damage.

[0060] Example 2;

[0061] Please see Figure 1 This embodiment provides a well-type double-beam structure of steel pipe column and concrete beam, including steel pipe column 1 and concrete well-type double beam 5. Several sets of anti-bending components are uniformly arranged along the circumferential direction on the outer wall of steel pipe column 1. The anti-bending components are fixedly connected to the steel reinforcement frame in the concrete well-type double beam 5. A magnetic detection component is provided between the upper anti-bending bracket 2 and the lower anti-bending bracket 3 of each set of anti-bending components. A magnetic sensing component matching the magnetic detection component is provided inside the steel pipe column 1. Shear bracket 17 is also provided between two adjacent sets of anti-bending components on the outer wall of steel pipe column 1.

[0062] The bending-resistant components are at least four sets, typically four or eight sets. When there are four sets, it is best that each set is parallel to the beam of the concrete well-type double beam 5, at a 90° angle. When there are eight sets, it is best that four sets are parallel to the beam of the concrete well-type double beam 5, and the other four sets are at a 45° angle. When the number of bending-resistant components is other than required, they can be arranged according to actual needs. Finally, based on the obtained test results, the bending moment or bending moment distribution of the beam-column joint is obtained, and the overall bending state of the joint is determined.

[0063] In this embodiment, the bending resistance testing device described in Embodiment 1 is installed in the well-type double beam structure, which can effectively detect the bending state of the nodes of the well-type double beam structure without affecting the normal use of the structure. The bending resistance brackets arranged symmetrically on the upper and lower sides form a multi-directional bending resistance system with the well-type double beam structure. Combined with the shear resistance bracket design, the bending and shear resistance of the node area is significantly improved, meeting the building requirements of high load or earthquake-prone areas.

[0064] Furthermore, the steel pipe column involved in this embodiment can be further filled with concrete to form a steel-concrete composite column. By placing the bending resistance testing device at the joint between the steel-concrete composite column and the concrete well-type double beam structure, the bending state or bending bearing capacity of the joint can also be effectively detected.

[0065] The above-described specific embodiments are merely specific examples of the present invention. The patent protection scope of the present invention includes, but is not limited to, the product form and style of the above-described specific embodiments. Any appropriate changes or modifications made to a steel pipe column-reinforced concrete well-type double beam structure that conforms to the claims of the present invention, and any such changes or modifications made by a person skilled in the art, shall fall within the patent protection scope of the present invention.

Claims

1. A bending resistance testing device for a steel pipe column and concrete beam joint, wherein the steel pipe column is provided with a bending resistance component and fixedly connected to the concrete beam, the bending resistance component comprising an upper bending resistance bracket and a lower bending resistance bracket arranged opposite to each other; characterized in that: The bending resistance testing device includes a magnetic detection component disposed between the upper and lower bending resistance brackets and a magnetic sensing component disposed inside the steel pipe column and matched with the magnetic detection component. The magnetic detection component converts the bending deformation of the bending resistance component relative to the steel pipe column into a magnetic detection signal, and the magnetic sensing component acquires the magnetic detection signal. The bending state or bending bearing capacity of the beam-column joint is obtained based on the magnetic detection signal. The magnetic detection assembly includes a detection tube that is perpendicular to the outer wall of the steel pipe column. A guide rod is provided at one end of the detection tube near the steel pipe column. A hollow detection magnetic block is also disposed inside the detection tube. The end of the detection magnetic block away from the steel pipe column is provided with a first spring that connects to the inner wall of the detection tube. The end of the detection magnetic block near the steel pipe column is provided with a pull rope. The pull rope first extends toward one end of the steel pipe column, then goes around the guide rod and folds back, then passes through the detection magnetic block and extends toward the end away from the steel pipe column to connect with the other end of the detection tube. Both the pull rope and the first spring are in a taut state, so that the detection magnetic block is suspended in the detection tube. The end of the pull rope away from the steel pipe column is also equipped with a hook blade. The hook blade can convert the relative bending deformation between the upper and lower anti-bending brackets into a shearing action on the pull rope. When the pull rope is subjected to the shearing action of the hook blade, the detection magnetic block moves to the end away from the steel pipe column and generates a magnetic detection signal.

2. The bending resistance testing device for steel pipe column and concrete beam joint according to claim 1, characterized in that: The hook blade includes an upper hook blade and a lower hook blade, and the upper hook blade and the lower hook blade are provided with cutting holes at opposite ends that can cut the rope. The other end of the lower hook is fixed to the end of the lower anti-bending bracket away from the steel pipe column. The other end of the upper hook is provided with a second spring. The upper end of the second spring is provided with a limiting rope. The limiting rope passes through the end of the upper anti-bending bracket away from the steel pipe column and is connected to the steel pipe column. The upper anti-bending bracket is provided with a limiting baffle extending to the middle of the second spring. When relative bending deformation occurs between the upper and lower anti-bending brackets, the upper and lower hook blades will have relative displacement in the same or opposite directions and exert a shearing effect on the rope. The detection tube is provided with a channel for the upper and lower hook blades to move.

3. The bending resistance testing device for steel pipe column and concrete beam joint according to claim 2, characterized in that: The magnetic sensing assembly includes a mounting base and a magnetic sensor. The mounting base is located inside the steel pipe column, and the magnetic sensor is mounted on the mounting base and aligns with the detection magnetic block in the magnetic detection assembly.

4. The bending resistance testing device for steel pipe column and concrete beam joint according to claim 2, characterized in that: The pull rope is made of fiberglass.

5. The bending resistance testing device for steel pipe column and concrete beam joint according to claim 2, characterized in that: The guide rod is arranged along the diameter of the detection tube; the detection magnetic block is hollow and tubular; the detection tube is provided with a positioning plate connected to the end of the first spring away from the steel pipe column.

6. The steel pipe column to concrete beam joint flexural detection apparatus according to claim 2, wherein: The upper and lower hooks, the second spring, and the limiting rope are all protected by a protective shell.

7. The bending resistance testing device for steel pipe column and concrete beam joint according to claim 2, characterized in that: The upper anti-bending bracket is made of T-shaped or cross-shaped steel components and is arranged symmetrically from top to bottom.

8. A well-type double-beam structure of steel pipe columns and concrete beams, using the bending resistance testing device for the steel pipe column and concrete beam joint as described in any one of claims 1-7, characterized in that: It includes steel pipe columns and concrete well-type double beams. Several sets of anti-bending components are evenly provided on the outer wall of the steel pipe columns along the circumferential direction. The anti-bending components are fixedly connected to the steel reinforcement frame in the concrete well-type double beams. Each set of bending-resistant components has a corresponding magnetic detection component between the upper and lower bending-resistant brackets, and the steel pipe column is equipped with a magnetic sensing component that matches the magnetic detection component; the bending state or bending bearing capacity of the steel pipe column and the concrete well-type double beam joint is obtained based on the magnetic detection signal. Shear bracing is also provided between two adjacent sets of bending-resistant components on the outer wall of the steel pipe column.

9. The well-type double-beam structure of steel pipe columns and concrete beams according to claim 8, characterized in that: At least four sets of the bending resistance components are provided.

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