Self-resetting assembly type steel structure beam-column connecting joint with double-insurance collaborative composite energy consumption

Abstract

The utility model provides a self-resetting assembly type steel structure beam-column connecting joint with double-insurance collaborative composite energy consumption. The self-resetting assembly type steel structure beam-column connecting joint comprises a steel column, two ends of the steel beam are in butt joint with the steel columns on two sides; the two sets of bending-shearing composite energy dissipation damping devices are oppositely connected to the two sides of a web plate of the steel beam through bolts at the joint of the steel beam and the steel column, and are connected with a flange of the steel column through bolts at the same time; the two sets of tension-shear composite energy dissipation damping devices are oppositely connected to the upper flange and the lower flange of the steel beam through bolts at the joint of the steel beam and the steel column and are connected with the flanges of the steel column through bolts; the two sets of self-resetting devices comprise prestressed cables and two sets of prestressed tools, the two sets of prestressed tools are oppositely fixed to the two sides of webs of the steel columns and the steel beams respectively or oppositely fixed to the two sides of webs of the steel columns on the two sides respectively, and the two ends of the prestressed cables are anchored to the prestressed tools. Through reasonable design, the beam-column connecting joint keeps elasticity under small and medium earthquakes and can be continuously used without being repaired; the main body structure keeps elastic under large earthquakes and super-large earthquakes, and continuity of building structure functions is achieved by replacing the energy dissipation assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, in particular to prefabricated assembled structures, and specifically to a self-resetting assembled steel structure beam-column connection node with double insurance, coordinated composite energy consumption. Background Art

[0002] As an important lateral-resistance structure, steel frames are widely used in earthquake-prone areas. The beam-column connection nodes play an important role in transferring the load of the superstructure to the foundation in the overall frame. The beam-column connection nodes designed according to the traditional design concept often undergo irreversible plastic deformation after being subjected to earthquakes. This ductile design concept dissipates seismic energy through plastic deformation of the structure, ensuring the safety of the overall structure at the cost of irreversible plastic deformation. However, structures designed according to the traditional ductile design concept are difficult to repair after an earthquake, and the structural functions of the building are discontinuous, which often causes serious economic losses and does not conform to the current concept of sustainable development.

[0003] The beam-column connection nodes designed based on the replaceable concept control irreversible plastic damage on easily replaceable components by setting up easily replaceable components, and through reasonable design, the easily replaceable components dissipate most of the energy. The beam-column connection nodes designed with this concept can effectively protect the main structure from damage. After the earthquake, only the components need to be replaced to achieve rapid repair of the building, effectively reducing the interruption time of building functions and reducing the cost of repair.

[0004] Since the 1990s, when the self-resetting technology used in buildings was first proposed, it has been widely used in beam-column connection nodes, supports, and shear walls. The self-resetting assembled beam-column connection node is different from the traditional rigid beam-column connection node. It allows the beam end to rotate to a certain extent, eliminates the beam end rotation angle through self-resetting force, and configures corresponding energy-absorbing elements to dissipate energy. The beam-column connection node using this technology can effectively avoid the problem of irreversible plastic deformation of traditional beam-column connection nodes after earthquakes, and achieve the goal of continuous building structure function by replacing energy-absorbing elements. Summary of the invention

[0005] In view of the deficiencies and inspirations of the prior art, the utility model provides a self-resetting assembled steel structure beam-column connection node with double insurance and coordinated composite energy dissipation. Through reasonable design, the node remains elastic under small and moderate earthquakes and can continue to be used without repair; the main structure remains elastic under large and extremely large earthquakes, and the continuity of the building structure function is achieved by replacing energy-absorbing components.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] The utility model first provides a self-resetting assembled steel structure beam-column connection node with double insurance and coordinated composite energy dissipation, comprising: a steel column, which is an I-shaped / H-shaped steel column; a steel beam, which is an I-shaped / H-shaped steel column, and its two ends are butt-connected to the steel columns on both sides; two sets of bending-shear composite energy dissipation and damping devices, which are connected to the two sides of the web of the steel beam at the connection between the steel beam and the steel column by bolts in opposite directions, and are connected to the flanges of the steel column by bolts at the same time; two sets of tension-shear composite energy dissipation and damping devices, which are connected to the upper and lower flanges of the steel beam at the connection between the steel beam and the steel column by bolts in opposite directions, and are connected to the flanges of the steel column by bolts at the same time; two sets of self-resetting devices, including prestressed cables and two groups of prestressed tooling, the two groups of prestressed tooling are respectively fixed to the two sides of the web of the steel column and the steel beam in opposite directions, or are respectively fixed to the two sides of the web of the steel columns on both sides in opposite directions, and the two ends of the prestressed cables are anchored to the prestressed tooling. In the self-resetting assembled steel structure beam-column connection node with double insurance and coordinated composite energy dissipation provided by the utility model, a double insurance energy dissipation mechanism is formed by using a bending-shear composite energy dissipation damping device and a tension-shear composite energy dissipation damping device. The two dampers that dissipate energy through different force mechanisms can effectively avoid the disadvantage that the failure of a single damper leads to the failure of the entire structure, making the overall structure safer. Combined with the self-resetting function, a limited rotation angle is allowed at the node. After the earthquake, the self-resetting force provided by the prestressed cable can be used to restore the column body to its original position and eliminate the rotation angle.

[0008] In some embodiments, the bending-shear composite energy dissipation damping device is M-shaped, including: two U-shaped bending-shear composite energy dissipation components, which are arranged in parallel between the upper and lower flanges of the steel beam in an M shape, and the two U-shaped bending-shear composite energy dissipation components are provided with bolt holes on the sides away from each other, and the upper and lower flanges of the steel beam are provided with bolt holes correspondingly, and the two U-shaped bending-shear composite energy dissipation components are connected to the upper and lower flanges of the steel beam through a high-strength bolt group; an intermediate connecting piece is arranged between the two U-shaped bending-shear composite energy dissipation components on the sides close to each other, and is respectively connected and fixed to the two U-shaped bending-shear composite energy dissipation components, and the intermediate connecting piece is connected to the steel beam and the steel column through a high-strength bolt group. The bending-shear composite energy dissipation damping device provided by the utility model can give full play to the bending-shear energy dissipation effect when the node is deformed, and ensure the stable realization of the bending-shear energy dissipation mechanism.

[0009] In some embodiments, the U-shaped bending-shear composite energy dissipation component includes: a U-shaped connector, consisting of upper and lower flanges and an arc-shaped web; an inner shear plate, arranged between the upper and lower flanges of the U-shaped connector, and the inner shear plate is only welded to the upper and lower flanges of the U-shaped connector.

[0010] In some embodiments, the upper and lower flanges of the U-shaped connector are of unequal lengths, and the flange close to the steel beam flange is shortened.

[0011] In some embodiments, a pad strip is provided at the shortened portion of the flange of the U-shaped connector so that the length of the short flange is flush with the long flange, and the pad strip is welded and fixed to the inner side of the flange of the steel beam but is not fixed to the short flange.

[0012] In some embodiments, the intermediate connecting member is a channel steel connecting member, which is composed of left and right flanges and a web. The web of the channel steel connecting member and the flange close to the steel column are both provided with bolt holes, the web of the steel beam is provided with corresponding bolt holes, and the flange of the steel column is also provided with corresponding bolt holes. The channel steel connecting member is connected to the steel beam and steel column through a group of high-strength bolts.

[0013] In some embodiments, the tension-shear composite energy dissipation and damping device comprises: an L-shaped tension-compression energy dissipation plate, one limb of the L-shape is connected to the flange of the steel beam through a high-strength bolt group, and the other limb of the L-shape is connected to the flange of the steel column through a high-strength bolt group; a folded shear energy dissipation member, one folded end is fixed to one limb of the L-shaped tension-compression energy dissipation plate, and the other folded end is fixed to the other limb of the L-shaped tension-compression energy dissipation plate. The tension-shear composite energy dissipation and damping device provided by the utility model can give full play to the tension-compression-shear energy dissipation effect when the node is deformed, ensuring the stable realization of the tension-shear energy dissipation mechanism.

[0014] In some embodiments, dog-bone weakening notches are provided on both sides of one limb of the L-shaped tensile and compressive energy absorbing plate connected to the flange of the steel beam to form an I-shaped plate, and strip grooves are provided equidistantly in the middle of the I-shaped plate.

[0015] In some embodiments, the folded shear energy absorbing member is τ-shaped, including: two I-shaped shear plates, arranged in parallel and opposite to each other; a plurality of ribs, symmetrically welded in pairs at equal intervals on the front and rear sides of the webs of the two I-shaped shear plates; an H-shaped connecting plate, welded and fixed to the upper ends of the two I-shaped shear plates, and welded and fixed to one limb of the L-shaped tensile and compressive energy absorbing plate, and the lower ends of the two I-shaped shear plates are welded and fixed to the other limb of the L-shaped tensile and compressive energy absorbing plate.

[0016] In some embodiments, the folded shear energy absorbing member is F-shaped, including: two F-shaped shear plates, arranged in parallel and opposite to each other; a plurality of ribs, symmetrically welded in pairs at equal intervals on the front and rear sides of the webs of the two F-shaped shear plates, and on the upper and lower sides of the flanges of the two F-shaped shear plates; and one end of the flanges of the two F-shaped shear plates is welded and fixed to one limb of the L-shaped tensile and compressive energy absorbing plate, and one end of the web is welded and fixed to the other limb of the L-shaped tensile and compressive energy absorbing plate.

[0017] The beneficial effects of the utility model compared with the prior art are: the utility model provides a self-resetting assembled steel structure beam-column connection node with double insurance and coordinated composite energy dissipation, which can well cope with earthquake effects and realize the continuity of building structure functions by replacing energy dissipation components after the earthquake. Specifically, it can at least achieve the following beneficial effects:

[0018] (1) Double - insurance energy - dissipation mechanism: The M - shaped flexural - shear composite energy - dissipation damper and the square - shaped (or rectangular - shaped) tension - shear composite energy - dissipation damper are used to form a double - insurance energy - dissipation mechanism. The two dampers that dissipate energy through different force - bearing mechanisms can effectively avoid the drawback that the failure of a single damper leads to the failure of the overall structure, making the overall structure tend to be safe.

[0019] (2) Self - reset function: The beam - column connection joint is semi - rigid. Different from a fully rigid joint that cannot rotate at all and an articulated joint that allows rotation but has insufficient lateral resistance, it forms a rocking interface at the end section of the steel beam, allowing a limited beam - end rotation. When the steel beam rocks under earthquake action, the self - reset force provided by the prestressed cable can restore the steel beam to its original position and eliminate the rotation angle. It can continue to be used without repair under small and medium - sized earthquakes. Under large and extra - large earthquakes, the self - reset device is used to restore the steel beam to the vertical state, which is beneficial for the structure to quickly recover its function.

[0020] (3) Plastic damage control: By reasonably designing the shapes and damping parameters of the M - shaped flexural - shear composite energy - dissipation damper and the square - shaped (or rectangular - shaped) tension - shear composite energy - dissipation damper, plastic deformation can be effectively controlled on the two dampers, protecting the main structure from damage. After the earthquake, only the damaged dampers need to be replaced to achieve the goal of quickly restoring the structure function.

[0021] (4) Replaceable energy - dissipation components: The M - shaped flexural - shear composite energy - dissipation damper and the square - shaped (or rectangular - shaped) tension - shear composite energy - dissipation damper are each a whole. If irreversible plastic deformation occurs, the two dampers can be replaced as a whole by loosening the connection bolts. This design greatly improves the repair speed and is also convenient for on - site construction operations.

[0022] (5) The beam - column connection joint can be applied to various scenarios, such as light industrial factories, multi - storey and high - rise steel frame systems, frame - shear wall systems or frame - brace systems, and can take into account bearing capacity, energy - dissipation capacity and the aesthetics of the facade.

[0023] It should be understood that the implementation of any embodiment of the present utility model does not mean that multiple or all of the above - mentioned beneficial effects need to be simultaneously possessed or achieved. Brief Description of the Drawings

[0024] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0025] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0026] Figure 1 It is a three-dimensional diagram of a self-resetting assembled steel structure beam-column connection node with double insurance, coordinated composite energy dissipation;

[0027] Figure 2 This is a disassembled diagram of a self-resetting assembled steel structure beam-column connection node with double insurance and coordinated composite energy dissipation;

[0028] Figure 3 It is a front view of a self-resetting assembled steel structure beam-column connection node with double insurance, coordinated composite energy dissipation;

[0029] Figure 4 It is a disassembled diagram of a bending-shear composite energy dissipation damping device for a self-resetting assembled steel structure beam-column connection node with double insurance and coordinated composite energy dissipation;

[0030] Figure 5 It is a disassembled diagram of a tension-compression composite energy dissipation damping device for a self-resetting assembled steel structure beam-column connection node with double insurance and coordinated composite energy dissipation;

[0031] Figure 6 It is a structural diagram of a folded shear energy dissipation component (τ-shaped) of a self-resetting assembled steel structure beam-column connection node with double insurance and coordinated composite energy dissipation;

[0032] Figure 7 The diagram is a structural diagram of a folded shear energy-absorbing component (F-shaped) at a self-resetting assembled steel structure beam-column connection node with double insurance and coordinated composite energy dissipation.

[0033] Markings in the figure:

[0034] 1- Steel beam;

[0035] 2-Steel columns;

[0036] 3-Bending and shearing composite energy dissipation damping device;

[0037] 4-Tension-shear composite energy dissipation damping device;

[0038] 5-High-strength bolt group;

[0039] 6-U-type connector;

[0040] 7-Inner shear plate;

[0041] 8-intermediate connecting piece;

[0042] 9- Prestressed tooling;

[0043] 10- prestressed cables;

[0044] 11-L-shaped tension and compression energy dissipation plate;

[0045] 12-fold shear energy dissipation part;

[0046] 13-Triangular ribs.

[0047] In the various drawings, the same or corresponding reference numerals represent the same or corresponding parts. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in combination with the embodiment and the drawings. Here, the illustrative embodiment of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it 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 the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] It should be understood that the terms "include / comprise", "consist of..." or any other variations are intended to cover non-exclusive inclusion, so that a product, device, process or method that includes a series of elements includes not only those elements, but also may include other elements not explicitly listed when necessary, or also includes elements inherent to such product, device, process or method. In the absence of more restrictions, the elements defined by the sentence "include / comprise...", "consist of..." do not exclude the presence of other identical elements in the product, device, process or method that includes the elements.

[0051] It is also necessary to understand that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific direction, be constructed or operate in a specific direction, and cannot be understood as a limitation on the present invention.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0053] like Figure 1-3 As shown, the utility model provides a self-resetting assembled steel structure beam-column connection node with double insurance coordinated composite energy dissipation, which mainly includes: a steel beam 1, a steel column 2, two sets of bending-shear composite energy dissipation damping devices 3, two sets of tension-shear composite energy dissipation damping devices 4, two sets of self-resetting devices, and a high-strength bolt group 5.

[0054] like Figure 1-3 As shown, the steel beam 1 and the steel column 2 both adopt an I-shaped / H-shaped cross-section form, so as to facilitate the arrangement of two sets of bending-shear composite energy dissipation damping devices 3, two sets of tension-shear composite energy dissipation damping devices 4 and two sets of self-resetting devices.

[0055] It is easy to understand that the two sets of bending-shear composite energy dissipation damping devices are a type of energy dissipation damping, which are used for bending-shearing energy dissipation under earthquake action, and the two sets of tension-shear composite energy dissipation damping devices are a type of energy dissipation damping, which can dissipate tension, compression and shear energy. The two form a double insurance synergistic energy dissipation mechanism, and the two sets of self-reset devices can reduce the residual deformation of the node after the earthquake. The specific energy dissipation mechanism will be elaborated in detail in the following text in combination with the specific structure.

[0056] Combination Figure 2-4 The bending-shear composite energy dissipation damping device 3 and the web and upper and lower flanges of the steel beam 1 are provided with bolt holes correspondingly. Two sets of bending-shear composite energy dissipation damping devices 3 are connected to the two sides of the web of the steel beam 1 oppositely at the end of the steel beam 1 through a high-strength bolt group 5, and are symmetrically arranged on both sides of the web and fixed to the end of the steel beam 1. At the same time, the bending-shear composite energy dissipation damping device 3 is also connected to the steel column 2 through a high-strength bolt group 5. In this way, the connection and fixation of the steel beam 1 and the steel column 2 are realized with the help of the bending-shear composite energy dissipation damping device 3.

[0057] Continue to see Figure 2-4 The utility model provides a better bending-shear composite energy dissipation damping device 3, which is composed of two U-shaped bending-shear composite energy dissipation components and an intermediate connecting member 8. The two U-shaped bending-shear composite energy dissipation components have the same structure and are vertically symmetrically arranged in parallel between the upper and lower flanges of the steel beam 1 in an M shape. The intermediate connecting member 8 connects the left and right U-shaped bending-shear composite energy dissipation components to form a whole.

[0058] Specifically, the left flange of the left U-shaped bending-shear composite energy absorption component and the right flange of the right U-shaped bending-shear composite energy absorption component are both provided with bolt holes, and the upper and lower flanges of the steel beam 1 are correspondingly provided with bolt holes. The two U-shaped bending-shear composite energy absorption components are connected to the upper and lower flanges of the steel beam 1 through a high-strength bolt group 5.

[0059] In one embodiment, the two U-shaped bending-shear composite energy absorption components each include a U-shaped connecting member 6 and an inner shear plate 7. The U-shaped opening of the U-shaped connecting member 6 faces downward, that is, toward the steel column 2. The intermediate connecting member 8 is arranged between the upper and lower U-shaped bending-shear composite energy absorption components, and is respectively welded and fixed to the two U-shaped bending-shear composite energy absorption components. In addition, corresponding bolt holes are opened on the intermediate connecting member 8 and the steel column 2, and the intermediate connecting member 8 is connected to the steel column 2 through a high-strength bolt group 5.

[0060] Specifically, the U-shaped connector 6 has upper and lower flanges and an arc-shaped web. The upper and lower flanges are horizontal plates. The arc-shaped web can be designed to be C-shaped or semicircular. An inner shear plate 7 is arranged between the upper and lower flanges of the U-shaped connector 6. The U-shaped connector 6 has good shear energy dissipation capacity, and the arc-shaped web and the horizontal plate can consume part of the energy through bending deformation. In addition, the inner shear plate 7 is only welded to the upper and lower flanges of the U-shaped connector 6 on the upper and lower sides, and the left and right sides are not connected, that is, the left side of the inner shear plate 7 is not connected to the steel column 2, and the right side is not connected to the arc-shaped web. In this way, when the steel beam swings, it is easy to cause the upper and lower flanges of the U-shaped connector 6 to displace, causing the inner shear plate 7 to displace and deform, resulting in shear energy dissipation.

[0061] In one embodiment, the intermediate connecting member 8 is a channel steel connecting member, which is composed of left and right flanges and a web. The channel steel is open and faces away from the steel beam 1, and the flange of the channel steel close to the steel column 2 is provided with bolt holes, and the web of the channel steel is also provided with bolt holes. The flange of the steel column 2 is provided with corresponding bolt holes, and the web of the steel beam 1 is also provided with corresponding bolt holes. The intermediate connecting member 8 is connected and fixed to the web of the steel beam 1 and the flange of the steel column 2 by a high-strength bolt group 5. In this way, the two U-shaped bending-shear composite energy-absorbing components are formed into a whole through the channel steel, and are connected and fixed to both the steel beam 1 and the steel column 2.

[0062] In addition, in order to ensure that the U-shaped bending shear composite energy dissipation component fully exerts its energy dissipation capacity, the upper and lower flanges of the U-shaped connector 6 are of unequal lengths, and the flange close to the flange of the steel beam 1 is shortened to form a short flange. A pad strip is set below the short flange on the inner side of the flange of the steel beam 1 for leveling, so that the short flange contacts the flange of the steel beam 1 through the pad strip. When the beam end rotates, the pad strip cooperates with the bolt to drive the short flange side of the U-shaped connector 6 to rise with the steel beam 1, and a displacement difference is generated with the long flange side of the U-shaped connector 6, so that the U-shaped bending shear composite energy dissipation component is deformed, thereby giving full play to the energy dissipation capacity of the U-shaped bending shear composite energy dissipation component.

[0063] It should be noted that the pad strip is only welded and fixed to the flange of the steel beam 1, but not fixed to the short flange of the U-shaped connector 6. This design allows the pad strip to strengthen the flange at the beam end to a certain extent. At the same time, when the steel beam swings, the pad strip can cooperate with the high-strength bolts to lift the short flange side of the U-shaped connector 6, creating a displacement difference with the long flange side of the U-shaped connector 6, thereby driving the inner shear plate 7 to displace and deform, resulting in shear energy consumption.

[0064] Preferably, the channel steel connector uses unequal-sided channel steel, and the side connected to the steel column 2 is lengthened to facilitate the arrangement of bolts. In addition, the thickness of the lengthened flange is thickened to ensure the connection strength here, prevent premature damage here, and affect the energy dissipation performance of the damping device. At the same time, it is convenient to fix one side of the long flange of the U-shaped connector 6, ensure that it has a displacement difference with the short flange side, so that the inner shear plate can better dissipate energy.

[0065] Continue to see Figure 5 The utility model provides a better tension-shear composite energy dissipation and damping device 4, including an L-shaped tension-compression energy dissipation plate 11 and a folded shear energy dissipation member 12, and two triangular ribs 13 are further provided according to whether to strengthen the actual engineering situation, wherein one L-shaped leg of the L-shaped tension-compression energy dissipation plate 11 is connected to the flange of the steel beam 1 through a high-strength bolt group 5, and the other L-shaped leg is connected to the flange of the steel column 2 through a high-strength bolt group 5; one folded end of the folded shear energy dissipation member 12 is welded and fixed to one L-shaped leg of the L-shaped tension-compression energy dissipation plate 11, and the other folded end is welded and fixed to the other L-shaped leg of the L-shaped tension-compression energy dissipation plate 11; the two triangular ribs 13 are respectively fixed to the corners of the L-shaped tension-compression energy dissipation plate 11 on both sides.

[0066] The L-shaped tension and compression energy absorbing plate 11 is easy to process and manufacture and to be installed and fixed at the flange of the steel beam 1. It should be noted that the one leg of the L-shaped tension and compression energy absorbing plate 11 connected to the flange of the steel beam 1 is a long flange plate, and the one leg connected to the flange of the steel column 2 is a short flange plate. One end of the folded shear energy absorbing member 12 is welded and fixed to the long flange plate of the L-shaped tension and compression energy absorbing plate 11, and the other end is welded and fixed to the short flange plate of the L-shaped tension and compression energy absorbing plate 11.

[0067] Preferably, the L-shaped tensile and compressive energy absorbing plate 11 is connected to the flange of the steel beam 1 with dog-bone weakening notches on both sides (i.e., the long flange plate), forming an I-shaped plate. The length of the weakened part is adjusted according to the actual project. The middle of the I-shaped plate is slotted equidistantly, and the slots are in the form of strip grooves or oblong holes. For example, two, three or even four vertical strip grooves are equidistantly opened, and the bottom position of the strip groove is flush or roughly flush with the flange position of the channel steel connector. The length of the slot is adjusted according to the actual project. Bolt holes are opened on the upper and lower parts of the I-shaped plate, which is connected to the flange of the steel beam 1 through a high-strength bolt group 5. Bolt holes are also opened on the other limb of the L-shape, which is connected to the flange of the steel column 2 through a high-strength bolt group 5.

[0068] Under the action of small and medium earthquakes, the self-resetting assembled steel structure beam-column connection node with double insurance and composite energy dissipation is in an elastic state; under the action of large and super large earthquakes, the bending-shear composite energy dissipation damping device 3 and the tension-shear composite energy dissipation damping device 4 both participate in energy dissipation. With the increase of earthquake action, one side of the end of the steel beam 1 rises, and the folded shear energy dissipation member 12 in the tension-shear composite energy dissipation damping device 4 dissipates energy by shearing. The L-shaped tension-compression energy dissipation plate 11 dissipates part of the energy under tension and compression. The bending-shear composite energy dissipation damping device 3 dissipates energy by bending and shearing. The left and right flanges of the U-shaped bending-shear composite energy dissipation component dissipate energy by bending and dissipating each other, driving the built-in inner shear plate 7 to dissipate energy by shearing, forming a double insurance energy dissipation mechanism. The two dampers that dissipate energy through different force mechanisms can effectively ensure the shortcomings of overall structural failure caused by the failure of a single damper, making the overall structure safe. After energy dissipation, the residual deformation of the node is reduced by the self-resetting device. If the energy dissipation component undergoes irreversible plastic deformation, the energy dissipation function can be restored by removing the bolts and replacing the energy dissipation component.

[0069] In one embodiment, Figure 6 As shown, the folded shear energy dissipation member 12 is τ-shaped, and the τ-shaped folded shear energy dissipation member 12 and the L-shaped tension and compression energy dissipation plate 11 form a U-shaped tension-shear composite energy dissipation damping device 4. The τ-shaped folded shear energy dissipation member 12 includes two I-shaped shear plates, four ribs and an H-shaped connecting plate. The two I-shaped shear plates are arranged horizontally and parallel to each other, and the four ribs are symmetrically welded to the upper and lower sides of the webs of the two I-shaped shear plates at equal intervals, connecting and fixing the two I-shaped shear plates to form a lattice section; an H-shaped connecting plate is welded and fixed to the outer ends of the two I-shaped shear plates, and is also welded and fixed to one end of the L-shaped tension and compression energy dissipation plate 11, and the inner ends of the two I-shaped shear plates are welded and fixed to the other end of the L-shaped tension and compression energy dissipation plate 11. Of course, the number of I-shaped shear plates and ribs can be flexibly set according to actual conditions.

[0070] In another embodiment, Figure 7 As shown, the folding shear energy dissipation member 12 is F-shaped, and the F-shaped folding shear energy dissipation member 12 and the L-shaped tension and compression energy dissipation plate 11 constitute a Japanese-shaped tension-shear composite energy dissipation damping device 4. The F-shaped folding shear energy dissipation member 12 includes two F-shaped shear plates and six ribs, the two F-shaped shear plates are arranged horizontally and parallel to each other, two pairs of four ribs are welded at equal intervals on the upper and lower sides of the webs of the two F-shaped shear plates, and one rib is symmetrically welded on the outer and inner sides of the flanges to form a lattice section, one end of the flange of the F-shaped shear plate is welded and fixed to one end of the L-shaped tension and compression energy dissipation plate 11, and one end of the web is welded and fixed to the other end of the L-shaped tension and compression energy dissipation plate 11. Of course, the number of F-shaped shear plates and ribs can be flexibly set according to actual conditions.

[0071] Under the action of tension and compression, the L-shaped tension and compression energy dissipation plate 11 can control or transfer the location where plastic deformation occurs by weakening and slotting, so that plastic deformation occurs at a relatively weak location in the plate, and dissipates energy through plastic deformation of steel, so as to better exert the energy dissipation capacity of the plate. The τ-shaped or F-shaped shear energy dissipation member welded on the L-shaped tension and compression energy dissipation plate 11 provides partial lateral stiffness and dissipates part of the energy through shear deformation.

[0072] It should be noted that, although the tension-shear composite energy dissipation damping device 4 described above is symmetrically arranged on the outer surface of the upper and lower flanges of the steel beam, the folded shear energy dissipation member 12 welded to the L-shaped tension-compression energy dissipation plate 11 on the facade side can be removed during the design stage, and at the same time, by appropriately increasing the cross-sectional size of the folded shear energy dissipation member 12 on the other side, the facade is beautiful, and the bearing capacity and energy dissipation capacity are equivalent to the design goals of the folded shear energy dissipation members 12 on both sides. In this way, it can be applied to a variety of scenarios through reasonable design, such as being used in light industrial plants or side beams of steel frame structures.

[0073] Continue to see Figure 1-3 Both sets of self-resetting devices include a prestressed cable 10 and a prestressed fixture 9. One set of the prestressed fixtures 9 at both ends of the prestressed cable 10 is fixed oppositely to both sides of the web of the steel column 2 and arranged symmetrically on both sides of the web. The other set is fixed oppositely to both sides of the web of the steel beam 1 at a predetermined position and arranged symmetrically on both sides of the web, or fixed to both sides of the web of the steel column 2 on the other side. The prestressed cable 10 is arranged between the two sets of prestressed fixtures 9 and anchored to the prestressed fixtures 9 at both ends, thereby realizing the function of reducing the residual deformation of the node after an earthquake.

[0074] Specifically, the prestressed tooling 9 installed on the steel column 2 is composed of two ribs and at least one connecting plate. The two ribs are welded and fixed to the left and right flanges of the steel column 2, and at least one connecting plate is welded and fixed to the two ribs at both ends. The positions of the two ribs correspond to the upper and lower flanges of the steel beam 1 respectively. The two ribs and at least one connecting plate can also be welded and fixed to the web of the steel column 2, and two equidistant inner ribs can be further welded to the connecting plate. The prestressed cable 10 is anchored and fixed to the connecting plate.

[0075] The prestressed tooling 9 installed on the steel beam 1 is composed of two ribs and at least one inner rib, the two ribs are welded and fixed to the upper and lower flanges of the steel beam 1, and at least one inner rib is welded and fixed between the two ribs. The two ribs and at least one inner rib can also be welded and fixed to the web of the steel beam 1. The prestressed cable 10 is anchored and fixed to the two ribs.

[0076] Specifically, two prestressed cables 10 are arranged on each side of the web of the steel beam 1 , and the two prestressed cables 10 are symmetrically arranged along the upper and lower flanges close to the steel beam 1 .

[0077] The beam-column connection node involved in the utility model is used in a self-resetting assembled steel structure frame system with double insurance and coordinated composite energy consumption, and is symmetrically arranged at both ends of the same frame beam, and can be arranged in a single layer or multiple layers in the frame system.

[0078] During the construction phase of the beam-column connection node of the utility model, after the steel beams and steel columns are positioned, they can first be positioned according to the reserved bolt holes, and the bending-shear composite energy dissipation damping device and the tension-shear composite energy dissipation damping device can be connected using high-strength bolts, and finally the prestressed cable can be tensioned.

[0079] When the bending-shear composite energy dissipation and damping device at the beam-column connection node undergoes irreversible plastic deformation after an earthquake, after removing the connecting bolts, since the bending-shear composite energy dissipation and damping device is embedded in the inner side of the prestressed cable, it should be rotated 90° and removed from between the prestressed cables. The total height of the bending-shear composite energy dissipation and damping device should be less than the clear distance between the prestressed cables to facilitate the replacement of the bending-shear composite energy dissipation and damping device. By using easily replaceable energy dissipation components and self-resetting devices to achieve the concept of restorable functional development, the seismic effect is good and it is widely used in light industrial plants, high-rise building systems, etc.

[0080] The double-insurance synergistic composite energy-consuming self-resetting assembled steel structure beam-column connection node provided by the utility model is intended to solve technical problems such as the difficulty in post-earthquake structural repair caused by irreversible plastic deformation of traditional rigid-jointed beam-column connection nodes after an earthquake, while enriching the form of self-resetting assembled beam-column connection nodes, and providing a new form of self-resetting assembled beam-column connection node for civil buildings and industrial buildings, especially light industrial plants.

[0081] The beam-column connection node can be used in a steel frame system. Of course, it can also be combined with detachable and replaceable shear walls, energy-absorbing supports, etc. to form a frame-shear wall system and a frame-support system, and can be flexibly used in multi-story and high-rise building systems.

[0082] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

[0083] Although several specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present invention. Certain features described in the context of a separate embodiment may also be implemented in a single implementation in combination. On the contrary, the various features described in the context of a single implementation may also be implemented in multiple implementations individually or in any suitable sub-combination.

Claims

1. A self-resetting assembled steel structure beam-column connection node with double insurance and coordinated composite energy dissipation, characterized in that: include: Steel columns are I-shaped / H-shaped; The steel beam is I-shaped / H-shaped, and its two ends are butt-connected to the steel columns on both sides; Two sets of bending-shear composite energy dissipation damping devices are connected to opposite sides of the web of the steel beam at the connection between the steel beam and the steel column by bolts, and are connected to the flange of the steel column by bolts at the same time; Two sets of tension-shear composite energy dissipation damping devices are connected to the upper and lower flanges of the steel beam at the connection between the steel beam and the steel column by bolts, and are connected to the flanges of the steel column by bolts; Two sets of self-resetting devices include prestressed cables and two groups of prestressed tooling. The two groups of prestressed tooling are fixed oppositely to the two sides of the webs of steel columns and steel beams, or are fixed oppositely to the two sides of the webs of steel columns on both sides. Both ends of the prestressed cables are anchored to the prestressed tooling.

2. The beam-column connection node according to claim 1, characterized in that: The bending-shear composite energy dissipation damping device is M-shaped and includes: Two U-shaped bending-shear composite energy absorbing components are arranged in parallel between the upper and lower flanges of the steel beam in an M shape, and bolt holes are provided on the sides of the two U-shaped bending-shear composite energy absorbing components away from each other, and bolt holes are provided on the upper and lower flanges of the steel beam correspondingly, and the two U-shaped bending-shear composite energy absorbing components are connected to the upper and lower flanges of the steel beam through a high-strength bolt group; The intermediate connecting member is arranged between the sides of the two U-shaped bending-shear composite energy absorbing components close to each other, and is respectively connected and fixed to the two U-shaped bending-shear composite energy absorbing components, and the intermediate connecting member is connected to the steel beam and the steel column through a high-strength bolt group.

3. The beam-column connection node according to claim 2, characterized in that: The U-shaped bending and shearing composite energy dissipation component comprises: A U-shaped connector consisting of upper and lower flanges and a curved web; An inner shear plate is arranged between the upper and lower flanges of the U-shaped connector, and the inner shear plate is only welded to the upper and lower flanges of the U-shaped connector.

4. The beam-column connection node according to claim 3, characterized in that: The upper and lower flanges of the U-shaped connecting piece are of unequal length, and the flange close to the steel beam flange is shortened.

5. The beam-column connection node according to claim 4, characterized in that: A pad strip is arranged at the shortened portion of the flange of the U-shaped connector so that the length of the short flange is flush with the long flange, and the pad strip is welded and fixed to the inner side of the flange of the steel beam but not fixed to the short flange.

6. The beam-column connection node according to claim 2, characterized in that: The intermediate connecting member is a channel steel connecting member, which is composed of left and right flanges and a web. The web of the channel steel connecting member and the flange close to the steel column are both provided with bolt holes, the web of the steel beam is provided with corresponding bolt holes, and the flange of the steel column is also provided with corresponding bolt holes. The channel steel connecting member is connected to the steel beam and the steel column through a group of high-strength bolts.

7. The beam-column connection node according to claim 1, characterized in that: The tension-shear composite energy dissipation damping device comprises: An L-shaped tension and compression energy dissipation plate, one leg of the L-shape is connected to the flange of the steel beam through a high-strength bolt group, and the other leg of the L-shape is connected to the flange of the steel column through a high-strength bolt group; A folded shear energy absorbing member, one folded end of which is fixed to one L-shaped limb of the L-shaped tensile and compressive energy absorbing plate, and the other folded end of which is fixed to the other L-shaped limb of the L-shaped tensile and compressive energy absorbing plate.

8. The beam-column connection node according to claim 7, characterized in that: Dog-bone weakening notches are provided on both sides of one limb of the L-shaped tensile and compressive energy-absorbing plate connected to the flange of the steel beam to form an I-shaped plate, and strip grooves are provided in the middle of the I-shaped plate at equal intervals.

9. The beam-column connection node according to claim 7, characterized in that: The folding shear energy dissipating member is τ-shaped and comprises: Two I-shaped shear plates, arranged in parallel and opposite positions; A plurality of ribs are symmetrically welded in pairs at equal intervals to the front and rear sides of the webs of the two I-shaped shear plates; An H-shaped connecting plate is welded and fixed to the upper ends of the two I-shaped shear plates, and is also welded and fixed to one limb of the L-shaped tensile and compressive energy absorbing plate. The lower ends of the two I-shaped shear plates are welded and fixed to the other limb of the L-shaped tensile and compressive energy absorbing plate.

10. The beam-column connection node according to claim 7, characterized in that: The folding shear energy dissipating member is F-shaped and includes: Two F-shaped shear plates, arranged in parallel and opposite positions; A plurality of ribs are symmetrically welded in pairs at equal intervals to the front and rear sides of the webs of the two F-shaped shear plates, and to the upper and lower sides of the flanges of the two F-shaped shear plates; and One end of the flanges of the two F-shaped shear plates is welded and fixed to one limb of the L-shaped tensile and compressive energy absorbing plate, and one end of the web is welded and fixed to the other limb of the L-shaped tensile and compressive energy absorbing plate.

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