Friction energy dissipation anti-seismic support hanger

Abstract

The utility model relates to a friction energy dissipation anti-seismic support hanger which comprises a U-shaped pipe clamp, an inverted concave mounting plate, an inclined strut lower connecting piece, a first bolt and nut assembly, a vertical rod lower connecting piece, a second bolt and nut assembly, a vertical rod, a third bolt and nut assembly, a vertical rod upper connecting piece, a fourth bolt and nut assembly and an inclined strut and is of a hollow structure. A fifth bolt and nut assembly; oblong holes which are coaxial with the inclined strut are formed in two lug plates of the inclined strut upper connecting piece; the sixth bolt and nut assembly penetrates through the two lug plates of the inclined strut upper connecting piece and the upper end of the inclined strut from the lower end of the oblong hole front and back; the hollow sleeve is arranged in the cavity of the inclined strut, the two ends of the hollow sleeve abut against the inner wall of the cavity, the hollow sleeve is connected to a bolt of the sixth bolt and nut assembly in a sleeving mode and is in sliding fit with the bolt, the outer diameter of the hollow sleeve is larger than the short diameter of the long round hole, and when a nut of the sixth bolt and nut assembly is screwed down, the nut and the hollow sleeve clamp the side wall of the inclined strut. According to the utility model, the construction of a secondary energy consumption system is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of earthquake-resistant structures, and in particular to a friction-dissipating earthquake-resistant support bracket. Background Technology

[0002] Traditional screw-type seismic bracing systems suffer from severe local stress concentration, low structural optimization, and low material utilization. For example, Chinese invention patent publication number CN 114894460 A discloses an IMU-based method for monitoring and evaluating the damage status of seismic bracing systems. This method uses C-shaped channel steel as the main load-bearing component. When it is connected to the connector, the splicing position is on one side of the C-shaped channel steel, resulting in eccentric stress distribution and uneven stress distribution. This method cannot fully utilize the strength of the steel and is not conducive to consuming vibration energy. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a friction energy dissipation seismic support bracket, whose main load-bearing component is axially loaded, and in the process of being loaded, a two-level energy dissipation system is constructed, which includes the energy dissipation of friction between the bolt head and nut and the wall of the elongated hole during bolt slippage, and the energy dissipation of the steel pipe and steel material due to replastic deformation after the bolt slips to the top of the elongated hole.

[0004] To address the aforementioned issues, a friction-dissipating seismic bracing system was adopted, comprising:

[0005] U-shaped pipe clamp,

[0006] The concave mounting plate is installed vertically opposite to the U-shaped pipe clamp, with its two side plates installed on the outer sides of the U-shaped pipe clamp and in close contact.

[0007] The lower end of the diagonal brace connector is tightly attached to one side of the inverted concave mounting plate.

[0008] The first bolt and nut assembly is laterally connected to the lower end web of the diagonal brace connector, the two side plates of the inverted concave mounting plate, and the two side plates of the U-shaped pipe clamp, and is then tightened.

[0009] The lower end web of the vertical rod connector is tightly attached to the upper end web of the inverted concave mounting plate;

[0010] The second bolt and nut assembly is vertically connected to the lower end web of the lower connector of the vertical rod and the upper end web of the inverted concave mounting plate and is fastened.

[0011] The lower ends of the vertical rod are tightly attached to the inner sides of the two ear plates of the lower connector of the vertical rod;

[0012] The third bolt and nut assembly is laterally threaded through the lower end of the vertical rod and the two lugs of the lower connecting piece of the vertical rod and tightened therein.

[0013] The connecting piece on the vertical rod has two lugs that fit tightly against both sides of the upper end of the vertical rod;

[0014] The fourth bolt and nut assembly is laterally connected to the two lugs of the connector on the vertical rod and the upper end of the vertical rod and fastened.

[0015] The diagonal brace has its lower end tightly attached to the inner side of the two ear plates of the lower connector of the diagonal brace, and it is a hollow structure.

[0016] The fifth bolt and nut assembly is connected and tightened to the two lugs of the lower connector of the diagonal brace and the lower end of the diagonal brace.

[0017] The connecting piece on the diagonal brace has an elongated hole on its two ear plates that is coaxial with the diagonal brace, and its two ear plates are tightly attached to both sides of the diagonal brace.

[0018] The sixth bolt and nut assembly passes through the lower end of the elongated hole of the upper connector of the diagonal brace and connects to the two ear plates of the upper connector of the diagonal brace and the upper end of the diagonal brace.

[0019] A hollow sleeve is installed in the cavity of the diagonal brace. Its two ends abut against the inner wall of the cavity and are fitted onto the bolts of the sixth bolt and nut assembly, and are slidably adapted to the bolts. Its outer diameter is larger than the minor diameter of the elongated hole. When the nut of the sixth bolt and nut assembly is tightened, the nut and the hollow sleeve clamp the side wall of the diagonal brace.

[0020] With this structure, during an earthquake, the connecting parts on the diagonal brace are subjected to axial force, causing the sixth bolt and nut assembly to slide along the elongated hole. This sliding friction generates energy dissipation, which is the first stage of energy dissipation. When the sixth bolt and nut assembly moves to the top of the elongated hole, the diagonal brace undergoes bending deformation, which is the second stage of energy dissipation. This creates a two-stage energy dissipation system. The hollow sleeve at the top of the diagonal brace cavity can prevent the side wall of the diagonal brace from concave deformation when the nut is tightened, thus affecting the sliding friction of the sixth bolt and nut assembly along the elongated hole.

[0021] As a further improvement of this utility model, the middle web of the lower connecting member of the diagonal brace is vertical, and the ear plates on both sides of the web extend upward at an incline and are parallel to the diagonal brace. Bolt holes for splicing are provided on the web and ear plates.

[0022] This structure is adopted to fully ensure the axial force of the diagonal brace.

[0023] As a further improvement of this utility model, the web of the upper connecting member and the lower connecting member of the vertical rod is horizontal, and the two sides of the web are vertical ear plates, and bolt holes for splicing are opened on the web and ear plates.

[0024] This structure is adopted to fully ensure the axial force of the vertical rod.

[0025] As a further improvement of this utility model, the diagonal brace and vertical rod are made of square steel tubes. The square steel tubes have a closed structure around their entire body. A pair of bolt holes are spaced apart on one pair of side walls of the square steel tubes, and a pair of elongated holes are spaced apart on another pair of side walls to form a closed square steel tube with holes. Half bolt hole notches and half elongated hole notches are reserved at both ends of the square steel tubes. The half bolt hole notches are set on the side walls where the bolt holes are spaced apart, and the half elongated hole notches are set on the side walls where the elongated holes are spaced apart.

[0026] This structure, with its spaced bolt holes and spaced oblong holes, serves two purposes: firstly, it facilitates adjusting the installation position of the bolt and nut assembly; secondly, it promotes the bending deformation of the square steel tube in a folded manner. The multi-segment folded bending deformation helps to fully utilize the strength of the steel and dissipate energy effectively, while the notches at the ends easily guide the direction of deformation.

[0027] As a further improvement of this utility model, the middle web of the upper connector of the diagonal brace is transverse, and the two sides of the web are inclined downward ear plates, with the inclination direction being the same as the axis of the diagonal brace. Bolt holes for splicing are opened on the web and ear plates.

[0028] As a further improvement of this utility model, the cross-sectional dimensions of the square steel tube are 30mm×30mm; the thickness is 2.5mm; the bolt hole diameter is 13.5mm and the hole spacing is 30mm; the major diameter of the oblong hole is 27mm, the minor diameter is 13.5mm and the hole spacing is 60mm; wherein the square steel tube used for the vertical pipe is 180mm long and the square steel tube used for the diagonal brace is 300mm long.

[0029] As a further improvement of this utility model, flanges are provided at both ends of the hollow sleeve, and the flanges abut against the opposite side walls of the diagonal brace on both sides. A reinforcing web is provided between the two flanges to form an I-beam structure. The flanges and the reinforcing web extend along the axial direction of the diagonal brace to the same height as the top of the elongated hole through which the bolt of the sixth bolt and nut assembly passes.

[0030] With this structure, the flange can strengthen the part through which the elongated hole passes, preventing it from bending and deforming prematurely.

[0031] As a further improvement of this utility model, a gap is reserved between the upper and lower ends of the vertical rod and the web of the lower and upper connecting parts of the vertical rod.

[0032] This structure allows the bolt holes of the bolt and nut assembly to be stressed first. When the bolt holes are located in the middle of the side wall of the square steel tube, it is beneficial to fully bear the axial force.

[0033] As a further improvement of this utility model, bolt holes are made at the middle position of a pair of side walls of the square steel pipe.

[0034] With this structure, when the bolt holes and bolt and nut assemblies are spliced, it is beneficial for the axial center of the square steel tube sidewall to be fully stressed.

[0035] As a further improvement of this utility model, an elongated hole is opened in the middle position of the other pair of side walls of the square steel tube.

[0036] With this structure, when the square steel tube is bent and deformed, it is beneficial for the bending deformation to occur in the middle of the side wall of the square steel tube, which is beneficial for full deformation and energy dissipation.

[0037] As a further improvement of this utility model, a triangular cross-section rib is provided on the inner side wall of the inclined brace 11 that abuts the hollow sleeve 15, and triangular cross-section grooves are provided on both ends of the hollow sleeve and on the flange, and the triangular cross-section grooves are adapted to the triangular cross-section ribs.

[0038] With this structure, the triangular cross-section ribs can increase the friction area and enhance the bending resistance of the last section of the diagonal brace, preventing it from bending and deforming prematurely and affecting friction energy dissipation.

[0039] The main load-bearing components of this invention are basically under axial stress, achieving a more uniform stress distribution. Therefore, the average stress level is much higher than that of traditional supports and hangers, thus making fuller use of the steel strength. The optimization of the connecting parts also significantly reduces the stress concentration problem in this part. The friction between the bolt head and nut and the hole wall during bolt slippage is the basis of Level I energy dissipation. This stage can meet the basic stiffness under long-term conditions and the energy dissipation requirements under small earthquakes. After the bolt slips to the top of the elongated hole, the square steel tube is stressed to the point of local yielding of the steel, and then the component yields, which can achieve Level II energy dissipation. This stage provides a large plastic energy dissipation capacity for the support under large earthquakes. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of an embodiment.

[0041] Figure 2 This is a schematic diagram of the fracture at the hollow sleeve.

[0042] Figure 3 This is a front view of the lower connector of the vertical rod.

[0043] Figure 4 This is a side view of the lower connector of the vertical rod.

[0044] Figure 5 This is a top view of the lower connector of the vertical rod.

[0045] Figure 6 This is a front view of the connector on the diagonal brace.

[0046] Figure 7 This is a side view of the connector on the diagonal brace.

[0047] Figure 8 This is a top view of the connector on the diagonal brace.

[0048] Figure 9 This is a front view of the lower connector of the diagonal brace.

[0049] Figure 10 This is a side view of the lower connector of the diagonal brace.

[0050] Figure 11 This is a top view of the lower connector of the diagonal brace.

[0051] Figure 12 This is a schematic diagram of another type of hollow sleeve.

[0052] Figure 13 A schematic diagram of the structure for installing lifting rings on the web plate.

[0053] Figure 14 This is a schematic diagram of the structure after adding triangular cross-section ribs.

[0054] Reference numerals: 1. U-shaped pipe clamp; 2. Inverted concave mounting plate; 3. Lower connector of diagonal brace; 4. First bolt and nut assembly; 5. Lower connector of vertical rod; 6. Second bolt and nut assembly; 7. Vertical rod; 8. Third bolt and nut assembly; 9. Upper connector of vertical rod; 10. Fourth bolt and nut assembly; 11. Diagonal brace; 12. Fifth bolt and nut assembly; 13. Upper connector of diagonal brace; 131. Oblong hole; 14. Sixth bolt and nut assembly; 15. Hollow sleeve; 151. Flange; 152. Reinforcing web; 16. Lifting ring; 17. Triangular section rib; 18. Triangular section groove. Detailed Implementation

[0055] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0056] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, 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 a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0057] Example 1

[0058] like Figures 1-14 As shown, a friction-dissipating seismic bracing system includes:

[0059] U-shaped pipe clamp 1;

[0060] The concave mounting plate 2 is installed vertically opposite to the U-shaped pipe clamp 1, with its two side plates installed on the outer sides of the two side plates of the U-shaped pipe clamp 1 and in close contact.

[0061] The lower end web of the diagonal brace 3 is tightly attached to one side of the concave mounting plate 2.

[0062] The first bolt and nut assembly 4 is laterally connected to the lower end web plate of the diagonal brace lower connector 3, the two side plates of the inverted concave mounting plate 2, and the two side plates of the U-shaped pipe clamp 1, and is then tightened.

[0063] The lower connecting piece 5 of the vertical rod has its lower web plate tightly attached to the upper web plate of the inverted concave mounting plate 2;

[0064] The second bolt and nut assembly 6 is vertically connected to the lower web of the lower connecting piece 5 of the vertical rod and the upper web of the inverted concave mounting plate 2 and fastened thereto;

[0065] The lower ends of the vertical rod 7 are tightly attached to the inner sides of the two ear plates of the lower connector 5 of the vertical rod;

[0066] The third bolt and nut assembly 8 is laterally connected to the lower end of the vertical rod 7 and the two ear plates of the lower connecting piece 5 of the vertical rod and is then tightened.

[0067] The connecting piece 9 on the vertical rod has two ear plates that are tightly attached to both sides of the upper end of the vertical rod 7;

[0068] The fourth bolt and nut assembly 10 is laterally connected to the two lugs of the upper connector 9 on the vertical rod and the upper end of the vertical rod 7 and fastened thereto;

[0069] The lower end of the diagonal brace 11 is closely attached to the inner side of the two ear plates of the lower connector 3 of the diagonal brace, and it is a hollow structure.

[0070] The fifth bolt and nut assembly 12 is connected and tightened to the two ear plates of the lower connector 3 of the diagonal brace and the lower end of the diagonal brace 11.

[0071] The upper connector 13 of the diagonal brace has an elongated hole 131 on its two ear plates that is coaxial with the diagonal brace 11, and its two ear plates are tightly attached to both sides of the diagonal brace 11.

[0072] The sixth bolt and nut assembly 14 passes through the lower end of the elongated hole 131 of the upper connector of the diagonal brace and the two ear plates of the upper connector of the diagonal brace 13 and the upper end of the diagonal brace 11.

[0073] Hollow sleeve 15 is disposed in the cavity of diagonal brace 11, with its two ends abutting against the inner wall of the cavity and sleeved on the bolt of the sixth bolt and nut assembly 14, and slidingly adapted to the bolt. Its outer diameter is larger than the minor diameter of the elongated hole 131. When the nut of the sixth bolt and nut assembly 14 is tightened, the nut and the hollow sleeve 15 clamp the side wall of the diagonal brace 11.

[0074] With this structure, during an earthquake, the connecting piece 13 on the diagonal brace is subjected to axial force, causing the sixth bolt and nut assembly 14 to slide along the elongated hole 131. This sliding friction generates energy dissipation, which is the first stage of energy dissipation. When the sixth bolt and nut assembly 14 moves to the top of the elongated hole 131, the diagonal brace 11 undergoes bending deformation, which is the second stage of energy dissipation. This creates a two-stage energy dissipation system. The hollow sleeve 15 rests in the cavity of the diagonal brace 11, preventing the side wall of the diagonal brace from deforming inward when the nut is tightened, thus affecting the sliding friction of the sixth bolt and nut assembly 14 along the elongated hole 131.

[0075] Among them, the concave mounting plate 2 has a horizontal central web plate in the middle, and the two sides of the horizontal central web plate are inclined downward side web plates, with the outer side of the side web plates connected to vertical side plates.

[0076] In this embodiment, the middle web of the lower connector 3 of the diagonal brace is vertical, and the ear plates on both sides of the web extend upward at an incline and are parallel to the diagonal brace 11. Bolt holes for splicing are provided on the web and ear plates.

[0077] This structure is adopted to fully ensure that the diagonal brace 11 is subjected to axial force.

[0078] In this embodiment, the web of the upper connecting member 9 and the lower connecting member 5 of the vertical rod is horizontal, and the two sides of the web are vertical ear plates, with bolt holes for splicing provided on the web and ear plates.

[0079] This structure is adopted to fully ensure that the vertical rod 7 is subjected to axial force.

[0080] In this embodiment, the diagonal brace 11 and the vertical rod 7 are made of square steel tubes. The square steel tubes have a closed structure around their entire body. A pair of bolt holes are spaced apart on one pair of side walls of the square steel tubes, and a pair of elongated holes are spaced apart on another pair of side walls to form a closed square steel tube with holes. Half bolt hole notches and half elongated hole notches are reserved at both ends of the square steel tubes. The half bolt hole notches are set on the side walls where the bolt holes are spaced apart, and the half elongated hole notches are set on the side walls where the elongated holes are spaced apart.

[0081] This structure, with its spaced bolt holes and spaced oblong holes, serves two purposes: firstly, it facilitates adjusting the installation position of the bolt and nut assembly; secondly, it promotes the bending deformation of the square steel tube in a folded manner. The multi-segment folded bending deformation helps to fully utilize the strength of the steel and dissipate energy effectively, while the notches at the ends easily guide the direction of deformation.

[0082] In this embodiment, the middle web of the upper connector 13 of the diagonal brace is transverse, and the two sides of the web are inclined downward ear plates, with the inclination direction being the same as the axial direction of the diagonal brace 11. Bolt holes for splicing are opened on the web and ear plates.

[0083] In this embodiment, the square steel tube has a cross-sectional dimension of 30mm×30mm and a thickness of 2.5mm. The bolt hole diameter is 13.5mm and the hole spacing is 30mm. The long diameter of the oblong hole is 27mm, the short diameter is 13.5mm, and the hole spacing is 60mm. The square steel tube used for the vertical pipe is 180mm long, and the square steel tube used for the diagonal brace is 300mm long.

[0084] In this embodiment, the hollow sleeve 15 is provided with flanges 151 at both ends, and the flanges 151 abut against the opposite side walls of the diagonal brace on both sides. A reinforcing web 152 is provided between the two flanges 151 to form an I-beam structure. The flanges 151 and the reinforcing web 152 extend axially along the diagonal brace 11 to the same height as the top of the elongated hole through which the bolt of the sixth bolt and nut assembly 14 passes.

[0085] With this structure, the flange 151 can strengthen the part through which the elongated hole passes, preventing it from bending and deforming prematurely. Compared with the frictional force generated between the sixth bolt and nut assembly 14 and the connecting piece 13 on the diagonal brace, the sixth bolt and nut assembly 14 and the diagonal brace 11 generate a positive pressure. The square steel tube plate has a thin wall and is very easy to bend and deform, thus affecting the smooth sliding friction. Thickening the flange 151 and strengthening the bending resistance of the web 152 are both conducive to ensuring the smooth completion of the first-level friction energy dissipation.

[0086] A lifting ring 16 is installed on the reinforcing web 152. The diameter of the lifting ring 16 is larger than the inner wall width of the square steel tube. Holding the lifting ring 16 facilitates the installation of the hollow sleeve 15.

[0087] In this embodiment, a gap is reserved between the upper and lower ends of the vertical rod 7 and the web of the lower vertical rod connector 5 and the upper vertical rod connector 9.

[0088] This structure allows the bolt holes of the bolt and nut assembly to be stressed first. When the bolt holes are located in the middle of the side wall of the square steel tube, it is beneficial to fully bear the axial force.

[0089] In this embodiment, bolt holes are made at the middle position of a pair of sidewalls of the square steel tube.

[0090] With this structure, when the bolt holes and bolt and nut assemblies are spliced, it is beneficial for the axial center of the square steel tube sidewall to be fully stressed.

[0091] In this embodiment, an elongated hole is made at the middle position of the other pair of sidewalls of the square steel tube.

[0092] With this structure, when the square steel tube is bent and deformed, it is beneficial for the bending deformation to occur in the middle of the side wall of the square steel tube, which is beneficial for full deformation and energy dissipation.

[0093] In this embodiment, a triangular cross-section rib 17 is provided on the inner side wall of the inclined brace 11 that abuts the hollow sleeve 15, and a triangular cross-section groove 18 is provided on both ends of the hollow sleeve 15 and on the flange 151. The triangular cross-section groove 18 is adapted to the triangular cross-section rib 17.

[0094] With this structure, the triangular cross-section rib 17 can increase the friction area and enhance the bending resistance of the last section of the diagonal brace 11, preventing it from bending and deforming prematurely and affecting friction energy consumption.

[0095] The main load-bearing components of this invention are basically under axial stress, achieving a more uniform stress distribution. Therefore, the average stress level is much higher than that of traditional supports and hangers, thus making fuller use of the steel strength. The optimization of the connecting parts also significantly reduces the stress concentration problem in this part. The friction between the bolt head and nut and the hole wall during bolt slippage is the basis of Level I energy dissipation. This stage can meet the basic stiffness under long-term conditions and the energy dissipation requirements under small earthquakes. After the bolt slips to the top of the elongated hole, the square steel tube is stressed to the point of local yielding of the steel, and then the component yields, which can achieve Level II energy dissipation. This stage provides a large plastic energy dissipation capacity for the support under large earthquakes.

[0096] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several equivalent substitutions or obvious modifications can be made without departing from the concept of the present invention, and all such modifications, with identical performance or use, should be considered within the protection scope of the present invention.

Claims

1. A friction-dissipating seismic bracing system, characterized in that... include: U-shaped pipe clamp (1); The concave mounting plate (2) is installed vertically opposite to the U-shaped pipe clamp (1), and its two side plates are respectively installed on the outside of the two side plates of the U-shaped pipe clamp (1) and are in close contact. The lower connecting piece (3) of the diagonal brace has its lower web plate tightly attached to one side plate of the inverted concave mounting plate (2); The first bolt and nut assembly (4) is transversely connected to the lower end web of the diagonal brace lower connector (3), the two side plates of the concave mounting plate (2) and the two side plates of the U-shaped pipe clamp (1), and is fastened. The lower connecting piece (5) of the vertical rod has its lower web plate tightly attached to the upper web plate of the inverted concave mounting plate (2); The second bolt and nut assembly (6) is vertically connected to the lower web of the lower connector (5) of the vertical rod and the upper web of the concave mounting plate (2) and fastened. The lower ends of the vertical rod (7) are closely attached to the inner sides of the two ear plates of the lower connector (5); The third bolt and nut assembly (8) is transversely connected to the lower end of the vertical rod (7) and the two ear plates of the lower connector (5) of the vertical rod and fastened thereto; The connecting piece (9) on the vertical rod has two ear plates that are tightly attached to the upper ends of the vertical rod (7); The fourth bolt and nut assembly (10) is transversely connected to the two lugs of the upper connector (9) on the vertical rod and the upper end of the vertical rod (7) and fastened. The diagonal brace (11) has its lower end tightly attached to the inner side of the two ear plates of the lower connector (3) of the diagonal brace, and it is a hollow structure. The fifth bolt and nut assembly (12) is connected to the two ear plates of the lower connector of the diagonal brace (3) and the lower end of the diagonal brace (11) and fastened. The upper connector (13) of the diagonal brace has an elongated hole (131) on its two ear plates that is coaxial with the diagonal brace (11), and its two ear plates are tightly attached to both sides of the diagonal brace (11). The sixth bolt and nut assembly (14) passes through the lower end of the elongated hole (131) of the upper connector (13) of the diagonal brace and the two ear plates of the upper connector (13) of the diagonal brace and the upper end of the diagonal brace (11); A hollow sleeve (15) is installed in the cavity of the diagonal brace (11). Its two ends abut against the inner wall of the cavity and are fitted onto the bolts of the sixth bolt and nut assembly (14). It is adapted to slide with the bolts. Its outer diameter is larger than the short diameter of the elongated hole (131). When the nut of the sixth bolt and nut assembly (14) is tightened, the nut and the hollow sleeve (15) clamp the side wall of the diagonal brace (11).

2. The friction-dissipating seismic bracing system according to claim 1, characterized in that... The lower connector of the diagonal brace (3) has a vertical web plate in the middle, and the ear plates on both sides of the web plate extend upward at an angle and are parallel to the diagonal brace (11). Bolt holes for splicing are opened on the web plate and ear plates.

3. The friction-dissipating seismic bracing system according to claim 1, characterized in that... The web of the upper connecting piece (9) and the lower connecting piece (5) of the vertical rod is horizontal, and the two sides of the web are vertical ear plates. Bolt holes for splicing are opened on the web and ear plates.

4. The friction-dissipating seismic bracing system according to claim 1, characterized in that... The diagonal brace (11) and vertical rod (7) are made of square steel tubes. The square steel tubes are closed structures. A pair of bolt holes are opened at intervals on one pair of side walls of the square steel tubes, and a pair of elongated holes are opened at intervals on another pair of side walls to form a closed square steel tube with holes. Half bolt hole notches and half elongated hole notches are reserved at both ends of the square steel tubes. The half bolt hole notches are set on the side walls where the bolt holes are distributed at intervals, and the half elongated hole notches are set on the side walls where the elongated holes are distributed at intervals.

5. The friction-dissipating seismic bracing system according to claim 1, characterized in that... The middle web of the upper connector (13) of the diagonal brace is transverse, and the two sides of the web are inclined downward ear plates, with the inclination direction being the same as the axial direction of the diagonal brace (11). Bolt holes for splicing are opened on the web and ear plates.

6. The friction-dissipating seismic bracing system according to claim 4, characterized in that... The square steel tube has a cross-sectional dimension of 30mm×30mm and a thickness of 2.5mm. The bolt hole diameter is 13.5mm and the hole spacing is 30mm. The long diameter of the oblong hole is 27mm, the short diameter is 13.5mm, and the hole spacing is 60mm. The square steel tube used for the vertical pipe is 180mm long, and the square steel tube used for the diagonal brace is 300mm long.

7. The friction-dissipating seismic bracing system according to claim 1, characterized in that... The hollow sleeve (15) is provided with flanges (151) at both ends. The flanges (151) abut against the opposite side walls of the diagonal brace on both sides. A reinforcing web (152) is provided between the two flanges (151) to form an I-beam structure. The flanges (151) and the reinforcing web (152) extend axially along the diagonal brace (11) to the same height as the top of the elongated hole through which the bolt of the sixth bolt and nut assembly (14) passes.

8. The friction-dissipating seismic bracing system according to claim 1, characterized in that... The upper and lower ends of the vertical rod (7) are reserved with the web of the lower connecting piece (5) and the upper connecting piece (9) of the vertical rod.

9. The friction-dissipating seismic bracing system according to claim 4, characterized in that... Bolt holes are made at the middle position of one pair of sidewalls of the square steel tube, and oblong holes are made at the middle position of the other pair of sidewalls of the square steel tube.

10. The friction-dissipating seismic bracing according to claim 7, characterized in that... The hollow sleeve (15) abuts on the inner wall of the diagonal brace (11) with a triangular cross section rib (17), and the hollow sleeve (15) has triangular cross section grooves (18) on both ends and the flange (151), and the triangular cross section grooves (18) are adapted to the triangular cross section ribs (17).

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