A new self-centering steel beam-column joint

Abstract

The utility model discloses a novel self-resetting steel structure beam column joint, including the steel column of being located in the middle and the steel beam of being located respectively at its both sides, and the steel column and both sides steel beam connection position all are equipped with the symmetrical self-resetting part no.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering technology, and in particular to a novel self-resetting steel structure beam-column joint. Background Technology

[0002] In modern steel structure engineering, self-resetting beam-column joints are an innovative technology designed to improve the seismic toughness of structures. Its core objective is to allow controllable deformation under seismic loading and eliminate residual deformation in critical areas after the earthquake, essentially restoring the structure to its pre-earthquake position, thereby significantly reducing or even eliminating post-earthquake repair work.

[0003] Currently, many steel structures use shape memory alloy long screws to connect the steel structures. However, fatigue problems exist under long-term cyclic loading. Fatigued shape memory alloy long screws need to be replaced in time. At the same time, fatigued shape memory alloy long screws may also break, which may lead to the decomposition of steel structure beam-column joints. Therefore, there are certain dangers when maintaining steel structure beam-column joints.

[0004] In addition, although steel structure beam-column joints can self-reset to a certain extent after being impacted or subjected to an earthquake, excessive deformation can still cause vibration and displacement in various parts, so maintenance is also required. During the maintenance process, there is a possibility of beam-column separation, which poses a certain danger. Utility Model Content

[0005] To address the aforementioned problems, the present invention aims to provide a novel self-resetting steel structure beam-column joint.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a novel self-resetting steel structure beam-column joint, including a steel column located in the middle and steel beams located on both sides thereon, and symmetrical self-resetting parts are provided at the connection positions of the steel column and the two side steel beams. The self-resetting part includes:

[0007] Two sets of angle steel are respectively supported on the upper and lower sides of the steel beam and are in close contact with the steel column;

[0008] The connecting plate connects the two sets of angle steel, is located at the end of the steel beam, and fits against the steel column;

[0009] Multiple sets of shape memory alloy long screws, each with a high-strength nut threaded to the end, are used to pass through angle steel and fix it to steel columns and steel beams respectively.

[0010] A further preferred embodiment of this utility model is: both the steel column and the steel beam include a web located in the middle and flanges on both sides of the web;

[0011] Two sets of shape memory alloy long screws longitudinally penetrate the two sets of angle steels in the two sets of self-resetting parts and the flanges in their respective steel beams;

[0012] The other two sets of shape memory alloy long screws respectively penetrate laterally through the two sets of angle steels corresponding to the two sets of self-resetting parts and through the flanges in the steel column.

[0013] A further preferred embodiment of this utility model is: the connecting plate has two layers, which are integrally connected between two sets of angle steel in a set of self-resetting parts. The two connecting plates are arranged in parallel, and there is a gap between the two connecting plates. One layer is in contact with the end of the steel beam, and the other layer is in contact with the outer wall of the steel column.

[0014] A further preferred embodiment of this utility model is that the connecting plate is made of a low yield strength material.

[0015] A further preferred embodiment of this utility model is: a self-resetting part two is provided on both sides of the steel column, and the self-resetting part two includes:

[0016] U-shaped steel is fitted to the web of the steel column. The U-shaped steel has high-strength bolts, which are used to fix the U-shaped steel to the web of the steel column.

[0017] The first U-shaped frame is inserted and slids within the groove of the U-shaped steel, with both ends extending between the two flanges of the steel beam.

[0018] A further preferred embodiment of this utility model is: there is a gap between the U-shaped frame and the groove of the U-shaped steel, so that the U-shaped frame can be displaced along the U-shaped steel.

[0019] A further preferred embodiment of this utility model is: the outer walls of the upper and lower sides of the U-shaped frame are fitted with the inner wall of the U-shaped steel channel;

[0020] Both U-shaped steel and U-shaped frames are made of steel.

[0021] A further preferred embodiment of this utility model is: both ends of the U-shaped frame one are fixed with U-shaped frame two, and the upper and lower sides of the U-shaped frame two are in contact with the upper and lower flanges of the steel beam, respectively.

[0022] A further preferred embodiment of this utility model is that the second U-shaped frame is made of a material with low yield strength.

[0023] Compared with the prior art, the advantages of this utility model are:

[0024] 1. Through the nested design of U-shaped steel and U-shaped frame one, even if the shape memory alloy long screw breaks due to fatigue, U-shaped frame one can still hold the steel beam flange, forming a secondary stress path and avoiding the risk of collapse caused by instantaneous separation of beam and column.

[0025] 2. When the double-layer connecting plate in the self-resetting part one and the U-shaped frame two in the self-resetting part two are subjected to seismic deformation, irreversible plastic deformation occurs. After resetting, the deformation mark becomes a permanent damage marker, directly reflecting the maximum historical deformation of the node. Maintenance personnel can predict the risk without touching the high-risk area.

[0026] 3. By accurately judging the fatigue state of shape memory alloy long screws through visible deformation traces, blind replacement can be avoided, reducing maintenance costs and resource waste; inspectors can judge the damage level of nodes by visual deformation without professional equipment, which can accelerate post-disaster building safety assessment and reduce downtime. Attached Figure Description

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0030] Figure 3 This is a schematic diagram of the main structure of this utility model;

[0031] Figure 4 This is a schematic diagram of the self-resetting part of this utility model.

[0032] In the diagram: 1. Steel column; 2. Steel beam; 21. Web plate; 22. Flange; 3. Self-resetting part one; 31. Angle steel; 32. Connecting plate; 4. Self-resetting part two; 41. U-shaped steel; 42. U-shaped frame one; 43. U-shaped frame two; 5. Shape memory alloy long screw; 51. High-strength nut; 6. High-strength bolt. Detailed Implementation

[0033] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0034] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0035] This embodiment mainly describes a novel self-resetting steel structure beam-column joint. Please refer to [link / reference needed]. Figures 1-4 Specifically, the self-resetting beam-column joint is a mature technology that allows for controllable deformation. However, after this controllable deformation, the beam-column joint automatically resets. From the operator's perspective, the reset beam-column joint appears to be in the same state as the undeformed joint, making direct differentiation difficult. Therefore, a novel self-resetting steel structure beam-column joint is proposed. Figures 1-2 As shown, it includes a steel column 1 in the middle and steel beams 2 on both sides. The connection positions of the steel column 1 and the two steel beams 2 are provided with symmetrical self-resetting parts 3. The self-resetting parts 3 include: two sets of angle steels 31, connecting plates 32 and multiple sets of shape memory alloy long screws 5.

[0036] Two sets of angle steel 31 are respectively supported on the upper and lower sides of the steel beam 2 and are in contact with the steel column 1;

[0037] The connecting plate 32 is connected between the two sets of angle steel 31, located at the end of the steel beam 2, and is in contact with the steel column 1;

[0038] Each shape memory alloy long screw 5 is threaded to a high-strength nut 51 at its end. Multiple sets of shape memory alloy long screws 5 are used to pass through the angle steel 31 and fix it to the steel column 1 and the steel beam 2 respectively.

[0039] Specifically, the angle steel 31 in the two sets of self-resetting parts 3 supports the right angle at the connection position of the steel column 1 and the steel beam 2, and the steel column 1 and the steel beam 2 are fixed to their respective angle steel 31 by the shape memory alloy long screw 5 to form a self-resetting beam-column node. It should be noted that the shape memory alloy long screw 5 can achieve a certain degree of deformation, which is an existing technology.

[0040] Both the steel column 1 and the steel beam 2 include a web 21 located in the middle and flanges 22 on both sides of the web 21. Both the steel column 1 and the steel beam 2 are H-beams. The steel column 1 extends longitudinally and the steel beam 2 extends laterally. The steel column 1 is supported between the steel beams 2 on both sides.

[0041] Two sets of shape memory alloy long screws 5 longitudinally penetrate the two sets of angle steels 31 in the two sets of self-resetting parts 3 and the flanges 22 in their respective steel beams 2;

[0042] The other two sets of shape memory alloy long screws 5 respectively penetrate laterally through the two sets of angle steels 31 corresponding to the two sets of self-resetting parts 3 and through the flange 22 in the steel column 1.

[0043] Specifically, each set of shape memory alloy long screws 5 has multiple screws. The multiple longitudinal shape memory alloy long screws 5 pass through the self-resetting part 3 of one set. Since the self-resetting part 3 clamps the end of the steel beam 2, the multiple shape memory alloy long screws 5 also pass through the steel beam 2. The steel beam 2 and the self-resetting part 3 are fixed by the multiple shape memory alloy long screws 5. The multiple transverse shape memory alloy long screws 5 pass through the two upper angle steels 31 in the two sets of self-resetting parts 3. The other transverse shape memory alloy long screws 5 pass through the two lower angle steels 31 and also pass through the steel column 1, fixing the self-resetting part 3 and the steel column 1.

[0044] like Figure 4 As shown, the connecting plate 32 has two layers and is integrally connected between the two sets of angle steels 31 of a set of self-resetting parts 3. The two layers of connecting plates 32 are arranged in parallel and there is a gap between the two layers of connecting plates 32. One layer is in contact with the end of the steel beam 2 and the other layer is in contact with the outer wall of the steel column 1.

[0045] Specifically, the connecting plate 32 has two layers with a gap between them. When the opposing steel column 1 remains stationary and the steel beam 2 tilts, the self-resetting part 3 will expand, causing the connecting plate 32 to be stretched and deformed without returning to its original position, allowing the operator to observe the deformation. When the steel column 1 and steel beam 2 collide, the outer connecting plate 32 will be pushed and is also prone to deformation.

[0046] The connecting plate 32 is made of a low yield strength material, specifically aluminum, which is prone to deformation and not easy to restore.

[0047] like Figures 2-3 As shown, both sides of the steel column 1 are provided with self-resetting parts 2 4, and the self-resetting parts 2 4 include:

[0048] U-shaped steel 41 is attached to the web plate 21 of steel column 1. High-strength bolts 6 are provided on U-shaped steel 41. U-shaped steel 41 is fixed to the web plate 21 of steel column 1 by high-strength bolts 6.

[0049] U-shaped frame 42 is fitted and slids in the groove of U-shaped steel 41, with both ends extending between the two flanges 22 of steel beam 2.

[0050] Specifically, the U-shaped steel 41 is fixed to the steel column 1, the U-shaped frame 42 is held in place by the U-shaped steel 41, and both ends of the U-shaped frame 42 extend to the space between the two flanges 22 of the steel beam 2. Even if the shape memory alloy long screw 5 at the end of the steel beam 2 breaks, it will be supported by the U-shaped frame 42 to avoid direct danger.

[0051] like Figure 3 As shown, there is a gap between the U-shaped frame 42 and the groove of the U-shaped steel 41, so that the U-shaped frame 42 can be displaced along the U-shaped steel 41.

[0052] Specifically, when the steel column 1 remains stationary, the steel beam 2 moves laterally, pushing the U-shaped frame 42 and causing it to move outward. The U-shaped frame 42 can then be displaced along the U-shaped steel 41, preventing it from being rigidly fixed and allowing the steel column 1 or the steel beam 2 to undergo lateral deformation.

[0053] The outer walls of the upper and lower sides of the U-shaped frame 42 are fitted to the inner wall of the U-shaped steel 41 channel;

[0054] Both U-shaped steel 41 and U-shaped frame 42 are made of steel, and they provide secondary support for steel beam 2.

[0055] Both ends of U-shaped frame 42 are fixed with U-shaped frame 43. The upper and lower sides of U-shaped frame 43 are in contact with the upper and lower flanges 22 of steel beam 2, respectively. When steel beam 2 undergoes torsional deformation or vertical deformation, it exerts a pushing effect on U-shaped frame 43, causing U-shaped frame 43 to undergo deformation that will not return to its original position. This allows personnel to directly observe the deformation state of steel column 1 or steel beam 2 during subsequent maintenance.

[0056] U-shaped frame 243 is made of low yield strength material, also made of aluminum, which is easy to deform and not easy to restore.

[0057] Working principle: The steel column 1 and steel beam 2 are commonly used support structures in existing technology. The steel beam 2 is perpendicular to the steel column 1, and the angle steel 31 at the perpendicular angle between them is also a common connection method. The shape memory alloy long screw 5 and the high-strength nut 51 that fixes the shape memory alloy long screw 5 are also commonly used structures in self-resetting beam-column joints. Through the transverse and longitudinal shape memory alloy long screw 5, the self-resetting parts 3 on both sides of the steel column 1 are fixed to the steel column 1, and the self-resetting parts 3 fix the steel beam 2, forming a connection while possessing self-resetting characteristics.

[0058] However, when the shape memory alloy long screw 5 is deformed and reset, it is difficult to observe whether deformation has occurred at the connection point between the steel column 1 and the steel beam 2, making it difficult to determine when to replace it. With the connecting plate 32, after deformation, the positions of the two sets of angle steels 31 in one group will deviate to a certain extent. The shape memory alloy long screw 5 deforms under force, and subsequently, the two sets of angle steels 31 reset, and the shape memory alloy long screw 5 also resets. The connecting plate 32 between the two sets of angle steels 31 is made of a low yield strength material, which begins to undergo plastic deformation under relatively small external forces. Therefore, the degree of deformation of the connecting plate 32 allows direct observation of whether the shape memory alloy long screw 5 and the self-resetting part 3 have deformed. Based on this, operators can adjust whether the shape memory alloy long screw 5 and the self-resetting part 3 need to be replaced based on the deformation marks on the connecting plate 32. Furthermore, the degree of deformation of the connecting plate 32 increases the operator's alertness.

[0059] Even if the shape memory alloy long screw 5 breaks, the U-shaped frame 42 still supports the steel beam 2, preventing one end of the steel beam 2 from falling due to lack of support. In addition, when deformation occurs at the connection between the steel column 1 and the steel beam 2, the U-shaped frame 43 is also compressed, and the U-shaped frame 43 also deforms and maintains its deformation. Based on this, it can be further observed whether the steel column 1 and the steel beam 2 are under controllable deformation.

[0060] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and 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 this utility model.

[0061] The above provides a detailed description of a novel self-resetting steel structure beam-column joint provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A new self-centering steel beam-column joint of steel structure, comprising a steel column in the middle and steel beams on both sides respectively, characterized in that, Symmetrical self-resetting parts are provided at the connection points of the steel columns and the steel beams on both sides. The self-resetting part includes: Two sets of angle steel are respectively supported on the upper and lower sides of the steel beam and are in close contact with the steel column; The connecting plate connects the two sets of angle steel, is located at the end of the steel beam, and fits against the steel column; Multiple sets of shape memory alloy long screws, each with a high-strength nut threaded to the end, are used to pass through angle steel and fix it to steel columns and steel beams respectively.

2. The new self-centering steel beam-to-column connection of claim 1, wherein, Both steel columns and steel beams include a web located in the middle and flanges on both sides of the web; Two sets of shape memory alloy long screws longitudinally penetrate the two sets of angle steels in the two sets of self-resetting parts and the flanges in their respective steel beams; The other two sets of shape memory alloy long screws respectively penetrate laterally through the two sets of angle steels corresponding to the two sets of self-resetting parts and through the flanges in the steel column.

3. The novel self-resetting steel structure beam-column joint according to claim 1, characterized in that, The connecting plate has two layers, which are integrally connected between two sets of angle steel in a set of self-resetting parts. The two connecting plates are arranged in parallel with a gap between them. One layer contacts the end of the steel beam, and the other layer contacts the outer wall of the steel column.

4. The novel self-resetting steel structure beam-column joint according to claim 1, characterized in that, The connecting plate is made of a low yield strength material.

5. The novel self-resetting steel structure beam-column joint according to claim 2, characterized in that, The steel column is equipped with a self-resetting part 2 on both sides. The self-resetting part 2 includes: U-shaped steel is fitted to the web of the steel column. The U-shaped steel has high-strength bolts, which are used to fix the U-shaped steel to the web of the steel column. The first U-shaped frame is inserted and slids within the groove of the U-shaped steel, with both ends extending between the two flanges of the steel beam.

6. The novel self-resetting steel structure beam-column joint according to claim 5, characterized in that, There is a gap between the U-shaped frame and the groove of the U-shaped steel, which allows the U-shaped frame to move along the U-shaped steel.

7. The novel self-resetting steel structure beam-column joint according to claim 5, characterized in that, The outer walls of the upper and lower sides of the U-shaped frame are fitted to the inner wall of the U-shaped steel channel; Both U-shaped steel and U-shaped frames are made of steel.

8. The novel self-resetting steel structure beam-column joint according to claim 5, characterized in that, Both ends of U-shaped frame one are fixed with U-shaped frame two, and the upper and lower sides of U-shaped frame two are in contact with the upper and lower flanges of the steel beam, respectively.

9. The novel self-resetting steel structure beam-column joint according to claim 8, characterized in that, The second U-shaped frame is made of a material with low yield strength.

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