Two-stage friction energy dissipation type self-resetting beam-column joint structure

Abstract

The invention discloses a two-stage friction energy dissipation type self-resetting beam column joint structure, and relates to the technical field of structural damping. The cantilever beam is vertically arranged on the middle-section side wall of the stand column; the splicing beam and the cantilever beam are arranged at an interval, and the free end of the cantilever beam is arranged opposite to the free end of the splicing beam; an upper wing plate of the cantilever beam is connected with an upper wing plate of the splicing beam; a lower wing plate of the cantilever beam is connected with a lower wing plate of the splicing beam; a two-stage friction energy consumption device is arranged between the free end of the cantilever beam and the free end of the splicing beam; two disc spring reset devices are arranged on the two faces of a web of the cantilever beam side by side respectively. Different lengths of the arc-shaped long holes in the friction plate are used for controlling graded friction energy consumption of nodes under different seismic intensities; the friction plate can return to the initial position through the disc spring reset device, the problem of residual displacement of the friction plate is solved, residual deformation of a structure after an earthquake is effectively reduced, and post-earthquake loss of a building structure is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of structural shock absorption, and in particular to a double-stage friction energy dissipation type self-resetting beam-column node structure. Background Art

[0002] Steel structures have been widely used in high-rise buildings due to their advantages such as light weight, high strength and good ductility. However, in many earthquakes in the past, steel nodes often suffered serious and irreversible damage, resulting in huge financial losses and maintenance shutdowns, and even causing a large number of casualties. In addition, some building structures even have to be demolished and rebuilt after serious damage, which is not conducive to environmental protection and sustainable development. Therefore, in order to reduce post-earthquake losses, alleviate post-earthquake repair tasks, and improve the seismic toughness of structures, how to provide an assembled self-resetting beam-column connection node that is convenient and efficient in construction, has good seismic toughness, strong self-resetting ability, and reliable seismic performance is a problem that technicians in this field urgently need to solve.

[0003] Once the existing friction energy-absorbing beam-column nodes are assembled, their energy-absorbing capacity is often fixed. They may have insufficient energy-absorbing capacity for different earthquake intensities or may be difficult to play an energy-absorbing role for smaller earthquakes.

[0004] Self-resetting beam-column nodes are usually composed of self-resetting elements and energy-absorbing elements, wherein the self-resetting elements usually include prestressed steel strands, prestressed steel bars and shape memory alloys (SMA). Compared with prestressed bars and steel strands, SMA materials have superior superelasticity and certain energy-absorbing capacity, so that the energy-absorbing system of the SMA self-resetting node can not only rely on its own materials to absorb energy, but also add low-yield metal components and friction absorbers to achieve the high energy-absorbing characteristics of the node. Applying smart materials SMA and high-energy-absorbing friction materials to self-resetting nodes can not only achieve energy dissipation, but also automatically reset to reduce repair costs.

[0005] Therefore, in order to meet actual needs, a two-stage friction energy dissipation type self-resetting beam-column node structure is provided. Summary of the invention

[0006] In view of the defects existing in the prior art, the purpose of the present application is to provide a two-stage friction energy-absorbing self-resetting beam-column node structure, which utilizes different arc-shaped long hole lengths in the friction plate to control the graded friction energy consumption of the node under different earthquake intensities; the disc spring reset device enables the friction plate to return to the initial position, solving the problem of residual displacement of the friction plate, and thus will not affect the subsequent energy consumption of the node; the SMA reset device installed on the outer side of the beam flange can not only improve the bearing capacity and energy consumption capacity of the node, but also effectively reduce the residual deformation of the structure after the earthquake, thereby reducing the post-earthquake losses of the building structure.

[0007] In order to achieve the above objectives, the technical solution adopted by this application is:

[0008] The present application provides a two-stage friction energy dissipation type self-resetting beam-column node structure, the self-resetting beam-column node structure comprising:

[0009] Column;

[0010] A cantilever beam vertically arranged on the side wall of the middle section of the column, wherein the cantilever beam is an I-beam;

[0011] a splicing beam spaced apart from the cantilever beam, wherein the free end of the cantilever beam is arranged opposite to the free end of the splicing beam, and the splicing beam is an H-shaped steel beam;

[0012] The upper wing plate of the cantilever beam is connected to the upper wing plate of the spliced ​​beam by at least two SMA screws arranged side by side and spaced apart;

[0013] The lower wing plate of the cantilever beam is connected to the lower wing plate of the spliced ​​beam by at least two SMA screws arranged side by side and spaced apart;

[0014] The free end of the cantilever beam is provided with a semicircular notch, a semicircular arc plate with the same width as the flange of the cantilever beam is welded on the semicircular notch, and an arc-shaped through hole is provided on the semicircular arc plate;

[0015] A double-stage friction energy dissipation device is provided between the free end of the cantilever beam and the free end of the spliced ​​beam, and the double-stage friction energy dissipation device includes a first friction plate, two second friction plates and two third friction plates;

[0016] The two second friction plates are welded to the inner edges of the semicircular arc plate;

[0017] The first friction plate, the second friction plate and the third friction plate are all provided with a first pin hole at their centers, the first friction plate is symmetrically provided with first bolt holes on both sides of the first pin hole, the second friction plate is symmetrically provided with second arc-shaped long holes on both sides of the first pin hole, and the third friction plate is symmetrically provided with third arc-shaped long holes on both sides of the first pin hole;

[0018] One of the third friction plates, one of the second friction plates, the first friction plate, another of the second friction plates and another of the third friction plates are stacked in sequence and connected by first pins passing through their respective first pin holes;

[0019] The third arc-shaped long hole corresponds to one of the second arc-shaped long holes and one of the first bolt holes, and the three are connected by a first bolt;

[0020] Two disc spring reset devices are arranged side by side on both sides of the web of the cantilever beam, and the disc spring reset device comprises:

[0021] An outer sleeve, wherein a first end of the outer sleeve is provided with an outer sleeve opening, and a second end of the outer sleeve is provided with a pressing plate inside;

[0022] A reset disc spring group is provided in the outer sleeve, and the reset disc spring group is located between the pressure plate and the opening of the outer sleeve;

[0023] A steel strand, one end of which passes through the internal through hole of the reset disc spring group and is connected to the pressure plate, and the other end of which passes through the internal through hole of the reset disc spring group and the arc-shaped through hole on the semicircular arc plate on the same side and is connected to the third friction plate;

[0024] The connection points of the steel strands of the two disc spring reset devices and the third friction plate on the same side are symmetrically arranged with the first bolt hole on the third arc-shaped long hole as the center.

[0025] On the basis of the above technical solution, the upper wing plate of the cantilever beam is connected to the upper wing plate of the spliced ​​beam by a plurality of SMA screws arranged side by side and spaced apart;

[0026] The lower wing plate of the cantilever beam is connected to the lower wing plate of the spliced ​​beam through a plurality of SMA screws arranged side by side and at intervals.

[0027] Based on the above technical solution, both ends of the SMA screw are connected to the upper wing plate of the cantilever beam, the upper wing plate of the spliced ​​beam, the lower wing plate of the cantilever beam or the lower wing plate of the spliced ​​beam through reinforcing angle steel.

[0028] On the basis of the above technical solution, the length of the second arc-shaped long hole is greater than the length of the third arc-shaped long hole.

[0029] On the basis of the above technical solution, the other end of the steel strand passes through the internal through hole of the reset disc spring group and the arc-shaped through hole on the semicircular arc plate on the same side, and is connected to the third friction plate through a reinforcing angle steel.

[0030] On the basis of the above technical solution, two stiffening ribs are arranged side by side on both sides of the web of the cantilever beam, and two stiffening rib through holes are arranged side by side on the stiffening ribs;

[0031] The other end of the steel strand passes through the internal through hole of the reset disc spring group, the corresponding stiffening rib through hole on the stiffening rib on the same side, and the arc-shaped through hole on the semicircular arc plate on the same side, and is connected to the third friction plate.

[0032] On the basis of the above technical solution, the outer sleeve openings of the two disc spring reset devices arranged side by side are both against the stiffening rib on the same side and are respectively opposite to the two stiffening rib through holes of the stiffening rib.

[0033] Based on the above technical solution, the other end of the steel strand passes through the internal through hole of the reset disc spring group, the corresponding stiffening rib through hole on the stiffening rib on the same side, and the arc-shaped through hole on the semicircular arc plate on the same side, and is connected to the third friction plate through a reinforcing angle steel.

[0034] On the basis of the above technical solution, when the two-stage friction energy dissipation device is in a free working condition, the connection points of the steel strands of the two disc spring reset devices and the third friction plate on the same side are symmetrically arranged with the first bolt hole on the third arc-shaped long hole as the center, and the connecting line of the three is parallel to the length direction of the column.

[0035] On the basis of the above technical solution, the arrangement direction of the first pin shaft and the two first bolts is perpendicular to the length direction of the column.

[0036] On the basis of the above technical solution, the cantilever beam and the spliced ​​beam are H-shaped steel beams of the same size.

[0037] Compared with the prior art, the advantages of this application are:

[0038] The present application utilizes different lengths of arc-shaped long holes in the friction plate to control the graded friction energy consumption of the node under different earthquake intensities; the disc spring reset device enables the friction plate to return to the initial position, solving the problem of residual displacement of the friction plate, and thus will not affect the subsequent energy consumption of the node; the SMA reset device installed on the outer side of the beam flange can not only improve the bearing capacity and energy consumption capacity of the node, but also effectively reduce the residual deformation of the structure after the earthquake, and reduce the post-earthquake loss of the building structure.

[0039] This application uses an SMA screw as a reset element, which is very convenient to assemble and install. SMA materials and high-energy-dissipating friction materials are applied to the self-reset node, which can not only achieve energy dissipation but also automatic reset, thereby reducing repair costs.

[0040] The present application is easy to assemble and maintain, and after an earthquake, only the friction layer on the surface of the friction plate needs to be repaired before it can be used again. The device has a simple structure, a clear force transmission mechanism, and various components of the device can be easily modularized for processing.

[0041] The present application can perform step-by-step energy consumption according to different earthquake intensities. In the case of small and medium earthquakes, only the first friction plate and the second friction plate of the friction energy consumption device will generate relative rotational friction energy consumption; in the case of a large earthquake, when the first friction plate rotates to a certain distance, the bolt will drive the third friction plate to start rotating together. At this time, there is relative rotational friction energy consumption between the first friction plate and the second friction plate, and between the second friction plate and the third friction plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 This is a structural schematic diagram of a double-stage friction energy dissipation type self-resetting beam-column node structure according to an embodiment of the present application;

[0044] Figure 2 It is a front view of a double-stage friction energy dissipation self-resetting beam-column node structure according to an embodiment of the present application;

[0045] Figure 3 A detailed structural diagram of a two-stage friction energy dissipation self-resetting beam-column node structure according to an embodiment of the present application;

[0046] Figure 4 It is a structural diagram of the assembly details of the cantilever beam and the double-stage friction energy dissipation device of the double-stage friction energy dissipation type self-resetting beam-column node structure of the embodiment of the present application;

[0047] Figure 5 It is a structural diagram of the assembly details of the first friction plate and the spliced ​​beam of the double-stage friction energy dissipation self-resetting beam-column node structure of the embodiment of the present application;

[0048] Figure 6 A detailed structural diagram of a double-stage friction energy dissipation device of a double-stage friction energy dissipation self-resetting beam-column node structure according to an embodiment of the present application;

[0049] Figure 7 A detailed structural diagram of a disc spring reset device of a double-stage friction energy dissipation type self-resetting beam-column node structure of an embodiment of the present application;

[0050] Figure 8 The assembly details of the SMA screw and the reinforced angle steel of the double-stage friction energy dissipation self-resetting beam-column node structure of the embodiment of the present application are shown in FIG.

[0051] In the figure:

[0052] 1. Column; 2. Cantilever beam; 20. Semicircular notch; 3. Spliced ​​beam; 4. SMA screw; 5. Reinforced angle steel; 6. Disc spring reset device; 601. Outer sleeve; 602. Reset disc spring group; 603. Pressure plate; 604. Outer sleeve opening; 605. Steel strand; 7. Two-stage friction energy dissipation device; 700. Semicircular arc plate; 7000. Arc through hole; 701. First friction plate; 702. Second friction plate; 703. Third friction plate; 704. First pin hole; 705. First bolt hole; 706. Second arc long hole; 707. Third arc long hole; 708. First pin shaft; 709. First bolt; 8. Stiffening rib; 80. Stiffening rib through hole. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0054] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings.

[0055] The embodiment of the present application provides a two-stage friction energy-absorbing self-resetting beam-column node structure, which utilizes different arc-shaped long hole lengths in the friction plate to control the graded friction energy consumption of the node under different earthquake intensities; the disc spring reset device enables the friction plate to return to the initial position, solving the problem of residual displacement of the friction plate, and thus will not affect the subsequent energy consumption of the node; the SMA reset device installed on the outer side of the beam flange can not only improve the bearing capacity and energy consumption capacity of the node, but also effectively reduce the residual deformation of the structure after the earthquake, thereby reducing the post-earthquake loss of the building structure.

[0056] In order to achieve the above technical effects, the overall idea of ​​this application is as follows:

[0057] A two-stage friction energy dissipation type self-resetting beam-column node structure, the self-resetting beam-column node structure comprising:

[0058] Column 1;

[0059] A cantilever beam 2 is vertically arranged on the side wall of the middle section of the column 1, and the cantilever beam 2 is an H-shaped steel beam;

[0060] a splicing beam 3 spaced apart from the cantilever beam 2, wherein the free end of the cantilever beam 2 is arranged opposite to the free end of the splicing beam 3, and the splicing beam 3 is an H-shaped steel beam;

[0061] The upper wing plate of the cantilever beam 2 is connected to the upper wing plate of the spliced ​​beam 3 by at least two SMA screws 4 arranged side by side and at intervals;

[0062] The lower wing plate of the cantilever beam 2 is connected to the lower wing plate of the spliced ​​beam 3 by at least two SMA screws 4 arranged side by side and spaced apart;

[0063] The free end of the cantilever beam 2 is provided with a semicircular notch 20, a semicircular arc plate 700 having the same width as the flange of the cantilever beam 2 is welded on the semicircular notch 20, and an arc-shaped through hole 7000 is provided on the semicircular arc plate 700;

[0064] A double-stage friction energy dissipation device 7 is provided between the free end of the cantilever beam 2 and the free end of the spliced ​​beam 3, and the double-stage friction energy dissipation device 7 includes a first friction plate 701, two second friction plates 702 and two third friction plates 703;

[0065] The two second friction plates 702 are welded to the inner edge of the semicircular arc plate 700;

[0066] The first friction plate 701, the second friction plate 702 and the third friction plate 703 are all provided with a first pin hole 704 at their centers; the first friction plate 701 is provided with first bolt holes 705 symmetrically on both sides of the first pin hole 704; the second friction plate 702 is provided with second arc-shaped long holes 706 symmetrically on both sides of the first pin hole 704; the third friction plate 703 is provided with third arc-shaped long holes 707 symmetrically on both sides of the first pin hole 704;

[0067] The third friction plate 703, the second friction plate 702, the first friction plate 701, another second friction plate 702 and another third friction plate 703 are stacked in sequence and connected by first pin shafts 708 passing through the respective first pin holes 704;

[0068] The third arc-shaped long hole 707 corresponds to one of the second arc-shaped long holes 706 and one of the first bolt holes 705, and the three are connected by a first bolt 709;

[0069] Two disc spring reset devices 6 are arranged side by side on both sides of the web of the cantilever beam 2, and the disc spring reset device 6 includes:

[0070] An outer sleeve 601, wherein an outer sleeve opening 604 is provided at a first end of the outer sleeve 601, and a pressing plate 603 is provided inside a second end of the outer sleeve 601;

[0071] A return disc spring assembly 602 is disposed in the outer sleeve 601, and the return disc spring assembly 602 is located between the pressure plate 603 and the outer sleeve opening 604;

[0072] A steel strand 605, one end of which passes through the internal through hole of the return disc spring assembly 602 and is connected to the pressure plate 603, and the other end of which passes through the internal through hole of the return disc spring assembly 602 and the arc-shaped through hole 7000 on the semicircular arc plate 700 on the same side and is connected to the third friction plate 703;

[0073] The connection points of the steel strands 605 of the two disc spring reset devices 6 and the third friction plate 703 on the same side are symmetrically arranged with the first bolt hole 705 on the third arc-shaped long hole 707 as the center.

[0074] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings.

[0075] See also Figures 1 to 8 As shown, the embodiment of the present application provides a two-stage friction energy dissipation type self-resetting beam-column node structure, and the self-resetting beam-column node structure includes:

[0076] Column 1;

[0077] A cantilever beam 2 is vertically arranged on the side wall of the middle section of the column 1, and the cantilever beam 2 is an H-shaped steel beam;

[0078] a splicing beam 3 spaced apart from the cantilever beam 2, wherein the free end of the cantilever beam 2 is arranged opposite to the free end of the splicing beam 3, and the splicing beam 3 is an H-shaped steel beam;

[0079] The upper wing plate of the cantilever beam 2 is connected to the upper wing plate of the spliced ​​beam 3 by at least two SMA screws 4 arranged side by side and at intervals;

[0080] The lower wing plate of the cantilever beam 2 is connected to the lower wing plate of the spliced ​​beam 3 by at least two SMA screws 4 arranged side by side and spaced apart;

[0081] The free end of the cantilever beam 2 is provided with a semicircular notch 20, a semicircular arc plate 700 having the same width as the flange of the cantilever beam 2 is welded on the semicircular notch 20, and an arc-shaped through hole 7000 is provided on the semicircular arc plate 700;

[0082] A double-stage friction energy dissipation device 7 is provided between the free end of the cantilever beam 2 and the free end of the spliced ​​beam 3, and the double-stage friction energy dissipation device 7 includes a first friction plate 701, two second friction plates 702 and two third friction plates 703;

[0083] The two second friction plates 702 are welded to the inner edge of the semicircular arc plate 700;

[0084] The first friction plate 701, the second friction plate 702 and the third friction plate 703 are all provided with a first pin hole 704 at their centers; the first friction plate 701 is provided with first bolt holes 705 symmetrically on both sides of the first pin hole 704; the second friction plate 702 is provided with second arc-shaped long holes 706 symmetrically on both sides of the first pin hole 704; the third friction plate 703 is provided with third arc-shaped long holes 707 symmetrically on both sides of the first pin hole 704;

[0085] The third friction plate 703, the second friction plate 702, the first friction plate 701, another second friction plate 702 and another third friction plate 703 are stacked in sequence and connected by first pin shafts 708 passing through the respective first pin holes 704;

[0086] The third arc-shaped long hole 707 corresponds to one of the second arc-shaped long holes 706 and one of the first bolt holes 705, and the three are connected by a first bolt 709;

[0087] Two disc spring reset devices 6 are arranged side by side on both sides of the web of the cantilever beam 2, and the disc spring reset device 6 includes:

[0088] An outer sleeve 601, wherein an outer sleeve opening 604 is provided at a first end of the outer sleeve 601, and a pressing plate 603 is provided inside a second end of the outer sleeve 601;

[0089] A return disc spring assembly 602 is disposed in the outer sleeve 601, and the return disc spring assembly 602 is located between the pressure plate 603 and the outer sleeve opening 604;

[0090] A steel strand 605, one end of which passes through the internal through hole of the return disc spring assembly 602 and is connected to the pressure plate 603, and the other end of which passes through the internal through hole of the return disc spring assembly 602 and the arc-shaped through hole 7000 on the semicircular arc plate 700 on the same side and is connected to the third friction plate 703;

[0091] The connection points of the steel strands 605 of the two disc spring reset devices 6 and the third friction plate 703 on the same side are symmetrically arranged with the first bolt hole 705 on the third arc-shaped long hole 707 as the center.

[0092] Specifically, the cantilever beam 2 and the spliced ​​beam 3 are H-shaped steel beams of the same size.

[0093] The technical solution of the embodiment of the present application utilizes different lengths of arc-shaped long holes in the friction plate to achieve graded friction energy dissipation of nodes under different earthquake intensities; the disc spring reset device enables the friction plate to return to the initial position, solving the problem of residual displacement of the friction plate, and thus will not affect the subsequent energy dissipation of the node; the SMA reset device installed on the outer side of the beam flange can not only improve the bearing capacity and energy dissipation capacity of the node, but also effectively reduce the residual deformation of the structure after the earthquake, thereby reducing the post-earthquake loss of the building structure.

[0094] Furthermore, the upper wing plate of the cantilever beam 2 is connected to the upper wing plate of the spliced ​​beam 3 by a plurality of SMA screws 4 arranged side by side and spaced apart;

[0095] The lower wing plate of the cantilever beam 2 is connected to the lower wing plate of the spliced ​​beam 3 through a plurality of SMA screws 4 arranged side by side and at intervals.

[0096] Furthermore, both ends of the SMA screw rod 4 are connected to the upper wing plate of the cantilever beam 2 , the upper wing plate of the spliced ​​beam 3 , the lower wing plate of the cantilever beam 2 or the lower wing plate of the spliced ​​beam 3 via reinforcing angle steels 5 .

[0097] Furthermore, the length of the second arc-shaped long hole 706 is greater than the length of the third arc-shaped long hole 707 .

[0098] Furthermore, the other end of the steel strand 605 passes through the internal through hole of the reset disc spring assembly 602 and the arc-shaped through hole 7000 on the semicircular arc plate 700 on the same side, and is connected to the third friction plate 703 through the reinforcing angle steel 5.

[0099] Furthermore, two stiffening ribs 8 are arranged side by side on both sides of the web of the cantilever beam 2, and two stiffening rib through holes 80 are arranged side by side on the stiffening rib 8;

[0100] The other end of the steel strand 605 passes through the internal through hole of the reset disc spring assembly 602, the corresponding stiffening rib through hole 80 on the stiffening rib 8 on the same side, and the arc-shaped through hole 7000 on the semicircular arc plate 700 on the same side, and is connected to the third friction plate 703.

[0101] Furthermore, the outer sleeve openings 604 of the two disc spring reset devices 6 arranged side by side are both against the stiffening rib 8 on the same side, and are respectively opposite to the two stiffening rib through holes 80 of the stiffening rib 8 .

[0102] Furthermore, the other end of the steel strand 605 passes through the internal through hole of the reset disc spring group 602, the corresponding stiffening rib through hole 80 on the stiffening rib 8 on the same side, and the arc through hole 7000 on the semicircular arc plate 700 on the same side, and is connected to the third friction plate 703 through the reinforcing angle steel 5.

[0103] Furthermore, when the two-stage friction energy dissipation device 7 is in a free working condition, the connection points of the steel strands 605 of the two disc spring reset devices 6 and the third friction plate 703 on the same side are symmetrically arranged with the first bolt hole 705 on the third arc-shaped long hole 707 as the center, and the connecting line of the three is parallel to the length direction of the column 1.

[0104] Furthermore, the arrangement direction of the first pin shaft 708 and the two first bolts 709 is perpendicular to the length direction of the column 1 .

[0105] It should be noted that, in actual implementation, the reinforcing angle steel 5 is fixed by welding or bolting.

[0106] Based on the technical solution of the embodiment of the present application, during the specific implementation, the situation is as follows:

[0107] When a small earthquake occurs, the spliced ​​beam 3 rotates slightly, driving the first friction plate 701 to start rotating. Since the second friction plate 702 is welded and fixed on the semicircular arc plate 700, relative rotational friction occurs on the contact surface between the first friction plate 701 and the second friction plate 702, and one end of the SMA screw 4 is compressed and the other end is pulled, which is a primary friction energy consumption state.

[0108] Due to the existence of the second arc-shaped long hole 706 and the third arc-shaped long hole 707 between the second friction plate 702 and the third friction plate 703 , the first bolt 709 can slide freely therein, so that the second friction plate 702 and the third friction plate 703 do not rotate relative to each other.

[0109] When a medium to large earthquake occurs, the spliced ​​beam 3 rotates at a large angle, and the first friction plate 701 drives the first bolt 709 to contact the third arc-shaped long hole 707 of the third friction plate 703 and begins to drive the third friction plate 703 to rotate. At this time, relative rotational friction occurs between the first friction plate 701 and the second friction plate 702, and between the third friction plate 703 and the second friction plate 702, which is a secondary friction energy consumption state.

[0110] When the technical solution of the embodiment of the present application enters the secondary friction state, when the third friction plate 703 rotates, one end will pull the steel strand 605 to compress the return disc spring group 602, and the other end of the steel strand 605 is in a relaxed state. When the node keeps rotating during an earthquake, the third friction plate 703 can always return to the initial position to continuously consume energy without affecting the energy consumption capacity of the node due to the residual displacement problem.

[0111] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0112] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0113] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A two-stage friction energy dissipation self-resetting beam-column node structure, characterized in that: The self-resetting beam-column node structure comprises: Column (1); A cantilever beam (2) vertically arranged on the side wall of the middle section of the column (1), wherein the cantilever beam (2) is an H-shaped steel beam; a splicing beam (3) arranged at a distance from the cantilever beam (2), wherein the free end of the cantilever beam (2) and the free end of the splicing beam (3) are arranged opposite each other, and the splicing beam (3) is an H-shaped steel beam; The upper wing plate of the cantilever beam (2) is connected to the upper wing plate of the spliced ​​beam (3) via at least two SMA screws (4) arranged side by side and spaced apart; The lower wing plate of the cantilever beam (2) is connected to the lower wing plate of the spliced ​​beam (3) via at least two SMA screws (4) arranged side by side and spaced apart; The free end of the cantilever beam (2) is provided with a semicircular notch (20), a semicircular arc plate (700) having the same width as the flange of the cantilever beam (2) is welded on the semicircular notch (20), and an arc-shaped through hole (7000) is provided on the semicircular arc plate (700); A double-stage friction energy dissipation device (7) is provided between the free end of the cantilever beam (2) and the free end of the spliced ​​beam (3), and the double-stage friction energy dissipation device (7) comprises a first friction plate (701), two second friction plates (702) and two third friction plates (703); The two second friction plates (702) are welded to the inner edges of the semicircular arc plate (700); The first friction plate (701), the second friction plate (702) and the third friction plate (703) are all provided with a first pin hole (704) at their centers; the first friction plate (701) is provided with first bolt holes (705) symmetrically on both sides of the first pin hole (704); the second friction plate (702) is provided with second arc-shaped long holes (706) symmetrically on both sides of the first pin hole (704); and the third friction plate (703) is provided with third arc-shaped long holes (707) symmetrically on both sides of the first pin hole (704); A third friction plate (703), a second friction plate (702), the first friction plate (701), another second friction plate (702) and another third friction plate (703) are stacked in sequence and connected via a first pin shaft (708) passing through each of the first pin holes (704); The third arc-shaped long hole (707) corresponds to one of the second arc-shaped long holes (706) and one of the first bolt holes (705), and the three are connected by a first bolt (709); Two disc spring reset devices (6) are arranged side by side on both sides of the web of the cantilever beam (2), and the disc spring reset device (6) comprises: An outer sleeve (601), wherein a first end of the outer sleeve (601) is provided with an outer sleeve opening (604), and a second end of the outer sleeve (601) is internally provided with a pressing plate (603); A return disc spring assembly (602) is provided in the outer sleeve (601), and the return disc spring assembly (602) is located between the pressure plate (603) and the outer sleeve opening (604); A steel strand (605), one end of the steel strand (605) passes through the internal through hole of the reset disc spring assembly (602) and is connected to the pressure plate (603), and the other end of the steel strand (605) passes through the internal through hole of the reset disc spring assembly (602) and the arc-shaped through hole (7000) on the semicircular arc plate (700) on the same side and is connected to the third friction plate (703); The connection points between the steel strands (605) of the two disc spring reset devices (6) and the third friction plate (703) on the same side are symmetrically arranged with the first bolt hole (705) on the third arc-shaped long hole (707) as the center.

2. The double-stage friction energy dissipation self-resetting beam-column node structure according to claim 1, characterized in that: The upper wing plate of the cantilever beam (2) is connected to the upper wing plate of the spliced ​​beam (3) via a plurality of SMA screws (4) arranged side by side and spaced apart; The lower wing plate of the cantilever beam (2) and the lower wing plate of the spliced ​​beam (3) are connected via a plurality of SMA screw rods (4) arranged side by side and spaced apart.

3. The double-stage friction energy dissipation self-resetting beam-column node structure according to claim 1, characterized in that: The two ends of the SMA screw rod (4) are connected to the upper wing plate of the cantilever beam (2), the upper wing plate of the spliced ​​beam (3), the lower wing plate of the cantilever beam (2) or the lower wing plate of the spliced ​​beam (3) via reinforcing angle steels (5).

4. The double-stage friction energy dissipation self-resetting beam-column node structure according to claim 1, characterized in that: The length of the second arc-shaped long hole (706) is greater than the length of the third arc-shaped long hole (707).

5. The double-stage friction energy dissipation self-resetting beam-column node structure according to claim 1, characterized in that: The other end of the steel strand (605) passes through the internal through hole of the return disc spring assembly (602) and the arc-shaped through hole (7000) on the semicircular arc plate (700) on the same side, and is connected to the third friction plate (703) through a reinforcing angle steel (5).

6. The double-stage friction energy dissipation self-resetting beam-column node structure according to claim 1, characterized in that: Two stiffening ribs (8) are arranged side by side on both sides of the web of the cantilever beam (2), and two stiffening rib through holes (80) are arranged side by side on the stiffening rib (8); The other end of the steel strand (605) passes through the internal through hole of the reset disc spring assembly (602), the corresponding stiffening rib through hole (80) on the stiffening rib (8) on the same side, and the arc-shaped through hole (7000) on the semicircular arc plate (700) on the same side, and is connected to the third friction plate (703).

7. The double-stage friction energy dissipation self-resetting beam-column node structure according to claim 6, characterized in that: The outer sleeve openings (604) of the two disc spring reset devices (6) arranged side by side are both against the stiffening rib (8) on the same side and are respectively opposite to the two stiffening rib through holes (80) of the stiffening rib (8).

8. The double-stage friction energy dissipation self-resetting beam-column node structure according to claim 6, characterized in that: The other end of the steel strand (605) passes through the internal through hole of the reset disc spring assembly (602), the corresponding stiffening rib through hole (80) on the stiffening rib (8) on the same side, and the arc-shaped through hole (7000) on the semicircular arc plate (700) on the same side, and is connected to the third friction plate (703) through a reinforcing angle steel (5).

9. The double-stage friction energy dissipation self-resetting beam-column node structure according to claim 1, characterized in that: When the two-stage friction energy dissipation device (7) is in a free working condition, the connection points of the steel strands (605) of the two disc spring reset devices (6) and the third friction plate (703) on the same side are symmetrically arranged with the first bolt hole (705) on the third arc-shaped long hole (707) as the center, and the connecting line of the three is parallel to the length direction of the column (1).

10. The double-stage friction energy dissipation self-resetting beam-column node structure according to claim 9, characterized in that: The arrangement direction of the first pin shaft (708) and the two first bolts (709) is perpendicular to the length direction of the column (1).

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