Multi-stage yield v-braced high strength steel frame structure

Abstract

The application discloses a multi-stage yield V-shaped support high-strength steel frame structure, which comprises a spliced beam, both ends of the spliced beam are connected with cantilever beams through artificial plastic hinge units, the ends of the two cantilever beams away from the artificial plastic hinge units are connected with high-strength steel columns, the opposite sides of the two high-strength steel columns are connected with column foot connecting plates, the bottom of the spliced beam is connected with a connecting plate, and the connecting plate and the two column foot connecting plates are connected with energy dissipation support pieces. The device structure of the application is composed of a high-strength steel main frame and common steel multi-damage elements, the collaborative action of the multi-damage elements significantly enhances the bearing and energy dissipation capacity of the structure under the action of an earthquake, the damage element sequence yield can be realized through the difference in the plastic deformation degree at different positions, the structure presents the performance characteristics of multi-stage yield, the post-yield stiffness of the structure is significantly improved, and the safety redundancy of the structure in an earthquake is enhanced.

Description

Technical Field

[0001] This invention belongs to the field of building frame support structure technology, specifically involving a multi-stage yielding V-shaped support high-strength steel frame structure. Background Technology

[0002] Replaceable damage elements are commonly used in post-earthquake replaceable structures to achieve concentrated and controllable damage during earthquakes and rapid post-earthquake repair. However, traditional damage elements use geometrically weakened components, which, due to the "weakest link" effect, result in poor overall structural load-bearing and energy dissipation capacity. The low stiffness after yielding further contributes to poor structural safety, limiting their large-scale application. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-stage yielding V-shaped braced high-strength steel frame structure, which solves the problem of poor seismic performance and safety of existing post-earthquake recoverable structures.

[0004] The technical solution adopted in this invention is a multi-stage yielding V-shaped support high-strength steel frame structure, including spliced ​​beams. Both ends of the spliced ​​beams are connected to cantilever beams through artificial plastic hinge units. The ends of the two cantilever beams away from the artificial plastic hinge units are connected to high-strength steel columns. The opposite sides of the two high-strength steel columns are connected to column base connecting plates. The bottom of the spliced ​​beam is connected to a connecting plate. Energy-dissipating support members are connected between the connecting plate and the two column base connecting plates.

[0005] The invention is further characterized in that, Both high-strength steel columns are connected by node stiffeners and column base stiffeners. The node stiffeners are located at the junction of the high-strength steel column and the cantilever beam, while the column base stiffeners are located near the bottom of the high-strength steel column.

[0006] The artificial plastic hinge unit includes two end plates, which are welded to the ends of the spliced ​​beam and the cantilever beam, respectively. The flanges of the cantilever beam and the spliced ​​beam are connected to anti-buckling flange cover plates by the first high-strength bolts. An artificial plastic hinge is also connected between the two end plates.

[0007] The artificial plastic hinge includes a main lug plate, one side of which is connected to the end plate at the end of the cantilever arm. Two parallel secondary lug plates are welded to the end plate at the end of the spliced ​​beam. The main lug plate is arranged parallel between the two secondary lug plates, and the main lug plate is connected to the two secondary lug plates by a pin.

[0008] Two perforated energy dissipators are connected between the end plate at the end of the spliced ​​beam and the end plate at the end of the cantilever arm by a second high-strength bolt. The main ear plate and the auxiliary ear plate are set between the two perforated energy dissipators.

[0009] The energy-dissipating support includes a grooved connecting rod connected to the connecting plate at the bottom of the splicing beam and the column base connecting plate, and a damper is connected to the grooved connecting rod.

[0010] The damper includes an outer frame, with two pairs of parallel bending plates connected to the inner edges of the outer frame, and shear plates connected to the inner edges of the outer frame, with the shear plates positioned between the two pairs of bending plates. It also includes connecting steel pipes, the outer wall of which is welded to the edges of the shear plate and the bending plate, and the pipe body of which is connected to the channel-shaped connecting plate by a third high-strength bolt.

[0011] The inner corners of the outer frame are all connected with stiffening ribs.

[0012] The beneficial effects of this invention are: 1. This invention adopts a design approach of high-strength steel main body and ordinary steel multiple damage elements. By using the material strength tolerance between high-strength steel and ordinary steel, the damage to the structure during an earthquake can be concentrated and controlled. This changes the traditional design idea of ​​post-earthquake recoverable structures that rely on the geometric weakening of damage elements to ensure concentrated and controllable structural damage. It effectively balances the seismic performance and post-earthquake recoverability of the structure.

[0013] 2. The three types of dampers are distributed in the flange, web and support positions. The difference in the degree of plastic deformation at different positions can achieve the sequential yielding of damage elements, resulting in the structure exhibiting multi-stage yielding performance characteristics, which significantly improves the stiffness of the structure after yielding and enhances the safety redundancy of the structure in earthquakes.

[0014] 3. By placing the support damper at the center of the support, only the middle section damper needs to be replaced after an earthquake. The entire support can be quickly restored to its function without dismantling it, significantly reducing the difficulty of replacing existing supports after an earthquake.

[0015] 4. The use of V-shaped energy-dissipating supports can transfer the axial force generated by the supports to the middle of the spliced ​​beam, effectively alleviating the excessive stress on the cantilever beam caused by the bending moment gradient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the multi-stage yielding V-shaped support high-strength steel frame structure of the present invention; Figure 2 This is a top view of the multi-stage yielding V-shaped support high-strength steel frame structure of the present invention; Figure 3 This is a schematic diagram of the artificial plastic hinge unit in the multi-stage yielding V-shaped support high-strength steel frame structure of the present invention; Figure 4 This is a schematic diagram of the groove-shaped connecting rod in the multi-stage yielding V-shaped support high-strength steel frame structure of the present invention; Figure 5 This is a schematic diagram of the damper in the multi-stage yielding V-shaped support high-strength steel frame structure of the present invention.

[0017] In the diagram, 1. Anti-buckling flange cover plate, 2. Opening energy dissipator, 3. Cantilever beam, 4. Spliced ​​beam, 5. Node stiffener, 6. High-strength steel column, 7. Channel connecting rod, 8. Connecting plate, 9. Column base stiffener, 10. First high-strength bolt, 11. Second high-strength bolt, 12. Third high-strength bolt, 13. Column base connecting plate, 14. End plate, 15. Outer frame, 16. Connecting steel pipe, 17. Bending plate, 18. Shear plate, 19. Stiffener, 20. Main lug plate, 21. Secondary lug plate, 22. Pin. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0019] This invention relates to a multi-stage yielding V-shaped braced high-strength steel frame structure, such as... Figure 1 As shown, the structure includes a spliced ​​beam 4, with cantilever beams 3 connected to both ends of the spliced ​​beam 4 via artificial plastic hinge units. High-strength steel columns 6 are connected to the ends of the two cantilever beams 3 furthest from the artificial plastic hinge units. Column base connecting plates 13 are connected to the opposite sides of the two high-strength steel columns 6. A connecting plate 8 is connected to the bottom of the spliced ​​beam 4, and energy-dissipating supports are connected between the connecting plate 8 and the two column base connecting plates 13. The device structure of this invention consists of a high-strength steel main frame and ordinary steel multi-damage elements. Under seismic loading, the synergistic effect of the damage elements significantly enhances the structure's load-bearing and energy-dissipating capacity. The different degrees of plastic deformation at different locations allow for sequential yielding of the damage elements, resulting in a multi-stage yielding performance characteristic of the structure. This significantly improves the post-yield stiffness of the structure and enhances its safety redundancy during earthquakes.

[0020] Example 1 The multi-stage yielding V-shaped braced high-strength steel frame structure includes a spliced ​​beam 4. Both ends of the spliced ​​beam 4 are connected to cantilever beams 3 through artificial plastic hinge units. The ends of the two cantilever beams 3 away from the artificial plastic hinge units are connected to high-strength steel columns 6. The opposite sides of the two high-strength steel columns 6 are connected to column base connecting plates 13. The bottom of the spliced ​​beam 4 is connected to a connecting plate 8. Energy-dissipating support members are connected between the connecting plate 8 and the two column base connecting plates 13.

[0021] Both high-strength steel columns 6 are connected by nodal stiffeners 5 and column base stiffeners 9. The nodal stiffeners 5 are located at the junction of the high-strength steel column 6 and the cantilever beam 3, while the column base stiffeners 9 are located near the bottom of the high-strength steel column 6. Under seismic loading, this design prevents instability and failure of the nodal area due to load transfer from the beam ends, and avoids column base deformation and failure due to axial load transfer from the supports, ensuring that energy-dissipating components first undergo plastic energy dissipation during seismic events.

[0022] Example 2 The multi-stage yielding V-shaped braced high-strength steel frame structure includes a spliced ​​beam 4. Both ends of the spliced ​​beam 4 are connected to cantilever beams 3 through artificial plastic hinge units. The ends of the two cantilever beams 3 away from the artificial plastic hinge units are connected to high-strength steel columns 6. Column base connecting plates 13 are welded to the bottom column bases of the two high-strength steel columns 6. The bottom of the spliced ​​beam 4 is connected to a connecting plate 8. Energy-dissipating support components are connected between the connecting plate 8 and the two column base connecting plates 13.

[0023] Both high-strength steel columns 6 are connected by node stiffening ribs 5 and column base stiffening ribs 9.

[0024] The artificial plastic hinge unit includes two end plates 14, which are welded to the ends of the spliced ​​beam 4 and the cantilever beam 3, respectively. The flanges of the cantilever beam 3 and the spliced ​​beam 4 are connected to buckling-restrained flange cover plates 1 via first high-strength bolts 10. An artificial plastic hinge is also connected between the two end plates 14. Bolt holes are pre-drilled on both sides of the end plates 14. The cantilever beam 3 and the spliced ​​beam 4 are bolted together via buckling-restrained flange cover plates 1, which are placed at the upper and lower flanges of the cantilever beam 3 and the spliced ​​beam 4, respectively. Bolt holes are pre-drilled on both sides of the buckling-restrained flange cover plates 1, corresponding to the pre-drilled bolt holes on the cantilever beam 3 and the spliced ​​beam 4. The buckling-restrained flange cover plates 1 are connected to the cantilever beam 3 and the spliced ​​beam 4 via M20 first high-strength bolts 10. Figure 2 As shown. A buckling-restrained rib is welded to the middle of the buckling-restrained cover plate 1 to prevent premature buckling deformation. The buckling-restrained cover plate 1 plays a role in transferring bending moment in the joint. The portion of the buckling-restrained cover plate 1 located between the cantilever beam 3 and the spliced ​​beam 4 is called the energy dissipation section. When the artificial plastic hinge rotates relative to the buckling-restrained cover plate 1, the energy dissipation section undergoes bending deformation. Therefore, the buckling-restrained cover plate 1 dissipates energy through the bending plastic deformation of the energy dissipation section.

[0025] Example 3 The multi-stage yielding V-shaped braced high-strength steel frame structure includes a spliced ​​beam 4. Both ends of the spliced ​​beam 4 are connected to cantilever beams 3 through artificial plastic hinge units. The ends of the two cantilever beams 3 away from the artificial plastic hinge units are connected to high-strength steel columns 6. Connecting plates 13 are welded to the bottom column bases of the two high-strength steel columns 6. Connecting plates 8 are connected to the bottom of the spliced ​​beam 4. Energy-dissipating support components are connected between the connecting plates 8 and the connecting plates 13 of the two column bases.

[0026] Both high-strength steel columns 6 are connected by node stiffening ribs 5 and column base stiffening ribs 9.

[0027] The artificial plastic hinge unit includes two end plates 14, which are welded to the ends of the splicing beam 4 and the cantilever beam 3 respectively. The flanges of the cantilever beam 3 and the splicing beam 4 are connected to the anti-buckling flange cover plate 1 by the first high-strength bolt 10. An artificial plastic hinge is also connected between the two end plates 14.

[0028] like Figure 3 As shown, the artificial plastic hinge includes a main lug plate 20. One side of the main lug plate 20 is connected to the end plate 14 at the end of the cantilever arm 3. Two parallel auxiliary lug plates 21 are welded to the end plate 14 at the end of the splicing beam 4. The main lug plate 20 is arranged in parallel between the two auxiliary lug plates 21. The main lug plate 20 and the two auxiliary lug plates 21 are connected by a pin 22. The artificial plastic hinge consists of a main lug plate 20 at the end of a cantilever beam 3 and a secondary lug plate 21 at the end of a splicing beam 4. The main lug plate 20 at the end of the cantilever beam 3 is welded to the end plate 14 at the end of the cantilever beam 3. The two secondary lug plates 21 at the ends of the two splicing beams 4 are placed in parallel and welded to the end plate 14 at the end of the splicing beams 4. The main lug plate 20 at the end of the cantilever beam 3 is placed between the secondary lug plates 21 at the ends of the two splicing beams 4, so that the pre-reserved circular holes in the middle of the three lug plates correspond to each other. The three lug plates are connected by a pin 22. The main lug plate 20 at the end of the cantilever beam 3 and the secondary lug plate 21 at the end of the splicing beam 4 can rotate relative to each other around the pin 22, thereby causing the components near the plastic hinge to deform and dissipate energy. During installation, one side of the high-strength steel cantilever beam 3 is welded to the flange of the high-strength steel column 6, and the other side is connected to an end plate 14. The same end plate 14 is connected to one side of the splicing beam 4. The main lug plate 20 is welded to the center of the end plate 14 at the cantilever beam 3, and two auxiliary lug plates 21 are symmetrically welded to both sides of the center of the end plate 14 at the splicing beam 4. The main lug plate 20 and auxiliary lug plate 21 are placed parallel to each other, each with a round hole in the middle. A pin 22 is inserted into the round hole to connect the main lug plate 20 and the auxiliary lug plate 21, forming an artificial plastic hinge.

[0029] Example 4 The multi-stage yielding V-shaped braced high-strength steel frame structure includes a spliced ​​beam 4. Both ends of the spliced ​​beam 4 are connected to cantilever beams 3 through artificial plastic hinge units. The ends of the two cantilever beams 3 away from the artificial plastic hinge units are connected to high-strength steel columns 6. The opposite sides of the two high-strength steel columns 6 are connected to column base connecting plates 13. The bottom of the spliced ​​beam 4 is connected to a connecting plate 8. Energy-dissipating support members are connected between the connecting plate 8 and the two column base connecting plates 13.

[0030] Both high-strength steel columns 6 are connected by node stiffening ribs 5 and column base stiffening ribs 9.

[0031] The artificial plastic hinge unit includes two end plates 14, which are welded to the ends of the splicing beam 4 and the cantilever beam 3 respectively. The flanges of the cantilever beam 3 and the splicing beam 4 are connected to the anti-buckling flange cover plate 1 by the first high-strength bolt 10. An artificial plastic hinge is also connected between the two end plates 14.

[0032] The artificial plastic hinge includes a main lug plate 20. One side of the main lug plate 20 is connected to the end plate 14 at the end of the cantilever arm 3. The end plate 14 at the end of the splicing beam 4 is welded with two parallel auxiliary lug plates 21. The main lug plate 20 is arranged in parallel between the two auxiliary lug plates 21. The main lug plate 20 and the two auxiliary lug plates 21 are connected by a pin 22.

[0033] Two perforated energy dissipators 2 are connected between the end plate 14 at the end of the spliced ​​beam 4 and the end plate 14 at the end of the cantilever beam 3 by a second high-strength bolt 11. A main lug plate 20 and a secondary lug plate 21 are positioned between the two perforated energy dissipators 2. The cantilever beam 3 and the spliced ​​beam 4 are bolted to the buckling-restrained flange cover plate 1 at the flange position and to the perforated energy dissipators 2 at the web position. The buckling-restrained flange cover plate 1, the perforated energy dissipators 2, and the artificial plastic hinge together constitute the three components connecting the cantilever beam 3 and the spliced ​​beam 4. The buckling-restrained flange cover plate 1 and the perforated energy dissipators 2 are respectively installed at the beam flange position and on both sides of the lug plate. During stress, they can achieve bending-shear separation. Combined with the effect of the artificial plastic hinge, this ensures that structural damage is concentrated and controllable during stress. Four perforated energy dissipators 2 are used, and both sides of each perforated energy dissipator 2 are bolted to the end plate. When the artificial plastic hinge rotates, the opening energy dissipator 2 bears the shear force and dissipates energy through shearing.

[0034] Example 5 The multi-stage yielding V-shaped braced high-strength steel frame structure includes a spliced ​​beam 4. Both ends of the spliced ​​beam 4 are connected to cantilever beams 3 through artificial plastic hinge units. The ends of the two cantilever beams 3 away from the artificial plastic hinge units are connected to high-strength steel columns 6. The opposite sides of the two high-strength steel columns 6 are connected to column base connecting plates 13. The bottom of the spliced ​​beam 4 is connected to a connecting plate 8. Energy-dissipating support members are connected between the connecting plate 8 and the two column base connecting plates 13.

[0035] Both high-strength steel columns 6 are connected by node stiffening ribs 5 and column base stiffening ribs 9.

[0036] The artificial plastic hinge unit includes two end plates 14, which are welded to the ends of the splicing beam 4 and the cantilever beam 3 respectively. The flanges of the cantilever beam 3 and the splicing beam 4 are connected to the anti-buckling flange cover plate 1 by the first high-strength bolt 10. An artificial plastic hinge is also connected between the two end plates 14.

[0037] The artificial plastic hinge includes a main lug plate 20. One side of the main lug plate 20 is connected to the end plate 14 at the end of the cantilever arm 3. The end plate 14 at the end of the splicing beam 4 is welded with two parallel auxiliary lug plates 21. The main lug plate 20 is arranged in parallel between the two auxiliary lug plates 21. The main lug plate 20 and the two auxiliary lug plates 21 are connected by a pin 22.

[0038] Two perforated energy dissipators 2 are connected between the end plate 14 at the end of the spliced ​​beam 4 and the end plate 14 at the end of the cantilever beam 3 by a second high-strength bolt 11. The main lug plate 20 and the auxiliary lug plate 21 are disposed between the two perforated energy dissipators 2. The cantilever beam 3 and the spliced ​​beam 4 are connected to the buckling-restrained flange cover plate 1 by bolts at the flange position, and to the perforated energy dissipators 2 by bolts at the web position.

[0039] The energy-dissipating support includes a connecting plate 8 connected to the bottom of the splice beam 4 and a channel-shaped connecting rod 7 on the column base connecting plate 13. A damper is connected to the channel-shaped connecting rod 7. The connecting plate 8 is located at the middle of the bottom of the splice beam 4. The energy-dissipating support consists of two dampers and eight channel-shaped connecting rods 7. The channel-shaped connecting rods 7 cause the dampers to deform through axial displacement, thereby causing plastic deformation of the bending plate 17 and shear plate 18 within the dampers to dissipate seismic energy. One end of the channel-shaped connecting rod 7 is connected to the column base, and the other end is connected to the connecting plate 8 at the lower flange of the splice beam. During stress, the energy-dissipating support transmits axial force to the middle of the splice beam 4, thus mitigating the excessive stress on the cantilever beam 3 caused by the bending moment gradient.

[0040] Example 6 The multi-stage yielding V-shaped braced high-strength steel frame structure includes a spliced ​​beam 4. Both ends of the spliced ​​beam 4 are connected to cantilever beams 3 through artificial plastic hinge units. The ends of the two cantilever beams 3 away from the artificial plastic hinge units are connected to high-strength steel columns 6. The opposite sides of the two high-strength steel columns 6 are connected to column base connecting plates 13. The bottom of the spliced ​​beam 4 is connected to a connecting plate 8. Energy-dissipating support members are connected between the connecting plate 8 and the two column base connecting plates 13.

[0041] Both high-strength steel columns 6 are connected by node stiffening ribs 5 and column base stiffening ribs 9.

[0042] The artificial plastic hinge unit includes two end plates 14, which are welded to the ends of the splicing beam 4 and the cantilever beam 3 respectively. The flanges of the cantilever beam 3 and the splicing beam 4 are connected to the anti-buckling flange cover plate 1 by the first high-strength bolt 10. An artificial plastic hinge is also connected between the two end plates 14.

[0043] The artificial plastic hinge includes a main lug plate 20. One side of the main lug plate 20 is connected to the end plate 14 at the end of the cantilever arm 3. The end plate 14 at the end of the splicing beam 4 is welded with two parallel auxiliary lug plates 21. The main lug plate 20 is arranged in parallel between the two auxiliary lug plates 21. The main lug plate 20 and the two auxiliary lug plates 21 are connected by a pin 22.

[0044] Two perforated energy dissipators 2 are connected between the end plate 14 at the end of the spliced ​​beam 4 and the end plate 14 at the end of the cantilever beam 3 by a second high-strength bolt 11. The main lug plate 20 and the auxiliary lug plate 21 are disposed between the two perforated energy dissipators 2. The cantilever beam 3 and the spliced ​​beam 4 are bolted to the anti-buckling flange cover plate 1 at the flange position and to the perforated energy dissipators 2 at the web position.

[0045] The energy-dissipating support includes a grooved connecting rod 7 connected to the connecting plate 8 and the column base connecting plate 13, and a damper is connected to the grooved connecting rod 7.

[0046] like Figure 4-5As shown, the damper includes an outer frame 15, and two pairs of parallel bending plates 17 are connected to the inner edges of the upper and lower sides of the outer frame 15. Shear plates 18 are connected to the inner edges of the upper and lower sides of the outer frame 15, and the shear plates 18 are disposed between the two pairs of bending plates 17. It also includes a connecting steel pipe 16, the outer wall of which is welded to the edges of the shear plate 18 and the bending plate 17. The pipe body of the connecting steel pipe 16 is connected to the channel-shaped connecting rod 7 by a third high-strength bolt 12. One end of a single channel-shaped connecting rod 7 is connected to the connecting plate 8, and the other end is connected to the connecting steel pipe 16 of the damper by four M30 third high-strength bolts 12. The connecting rod 7 causes the connecting steel pipe 16 to shift axially, thereby causing the bending plate 17 and the shear plate 18 welded to the connecting steel pipe 16 to undergo plastic deformation to dissipate seismic energy. The channel-shaped connecting rod 7 is connected to the intermediate damper by the third high-strength bolt 12. After an earthquake, only the intermediate section of the damper needs to be replaced, without replacing the connecting rod, so that the energy dissipation support function can be quickly restored.

[0047] Example 7 The multi-stage yielding V-shaped braced high-strength steel frame structure includes a spliced ​​beam 4. Both ends of the spliced ​​beam 4 are connected to cantilever beams 3 through artificial plastic hinge units. The ends of the two cantilever beams 3 away from the artificial plastic hinge units are connected to high-strength steel columns 6. The opposite sides of the two high-strength steel columns 6 are connected to column base connecting plates 13. The bottom of the spliced ​​beam 4 is connected to a connecting plate 8. Energy-dissipating support members are connected between the connecting plate 8 and the two column base connecting plates 13.

[0048] Both high-strength steel columns 6 are connected by node stiffening ribs 5 and column base stiffening ribs 9.

[0049] The artificial plastic hinge unit includes two end plates 14, which are welded to the ends of the splicing beam 4 and the cantilever beam 3 respectively. The flanges of the cantilever beam 3 and the splicing beam 4 are connected by a first high-strength bolt 10 and an anti-buckling flange cover plate 1. An artificial plastic hinge is also connected between the two end plates 14.

[0050] The artificial plastic hinge includes a main lug plate 20. One side of the main lug plate 20 is connected to the end plate 14 at the end of the cantilever arm 3. The end plate 14 at the end of the splicing beam 4 is welded with two parallel auxiliary lug plates 21. The main lug plate 20 is arranged in parallel between the two auxiliary lug plates 21. The main lug plate 20 and the two auxiliary lug plates 21 are connected by a pin 22.

[0051] Two perforated energy dissipators 2 are connected between the end plate 14 at the end of the spliced ​​beam 4 and the end plate 14 at the end of the cantilever beam 3 by a second high-strength bolt 11. A secondary lug plate 21 is disposed between the two perforated energy dissipators 2. The cantilever beam 3 and the spliced ​​beam 4 are bolted to the anti-buckling flange cover plate 1 at the flange position and to the perforated energy dissipators 2 at the web position.

[0052] The energy-dissipating support includes a grooved connecting rod 7 connected to the connecting plate 8 and the column base connecting plate 13, and a damper is connected to the grooved connecting plate 7.

[0053] The damper includes an outer frame 15, with two pairs of parallel bending plates 17 connected to the inner edges of the upper and lower sides of the outer frame 15, and shear plates 18 connected to the inner edges of the upper and lower sides of the outer frame 15, with the shear plates 18 positioned between the two pairs of bending plates 17; it also includes a connecting steel pipe 16, the outer wall of which is welded to the edges of the shear plates 18 and the bending plates 17, and the pipe body of the connecting steel pipe 16 is connected to the grooved connecting rod 7 by a third high-strength bolt 12.

[0054] The inner corners of the outer frame 15 are all connected with stiffening ribs 19 to prevent the frame from becoming unstable and deformed under stress.

[0055] The working principle of the multi-stage yielding V-shaped braced high-strength steel frame structure of this invention is as follows: The cantilever beam and high-strength steel columns are made of high-strength steel and remain in the elastic stage throughout the stress process. During the deformation process under stress, the artificial plastic hinge undergoes angular displacement, and the main and auxiliary lug plates rotate relative to each other around the pivot, thereby causing the components near the plastic hinge to deform and dissipate energy. The structure mainly relies on the buckling-restrained flange cover plate, the perforated energy dissipator, and the damper in the support section to bear the energy dissipation. The buckling-restrained flange cover plate plays a role in transferring bending moment in the joint, and the part of the buckling-restrained flange cover plate between the cantilever beam and the spliced ​​beam is called the energy dissipation section. When the artificial plastic hinge rotates relative to each other, the energy dissipation section region of the buckling-restrained flange cover plate undergoes bending plastic deformation.

[0056] The perforated energy dissipator is installed on the web of the beam. When the artificial plastic hinge rotates relative to the perforated energy dissipator, it causes shear plastic deformation. The buckling-restrained flange cover plate and the perforated energy dissipator are installed on the flange and on both sides of the ear plate, respectively. During the stress process, bending-shear separation can be achieved, ensuring that the damage to the structure is concentrated and controllable during the stress process. The channel-shaped connecting rod dissipates seismic energy by causing plastic deformation of the bending plate and shear plate in the damper through axial displacement.

Claims

1. A multi-stage yielding V-shaped braced high-strength steel frame structure, characterized in that, The system includes a splicing beam (4), both ends of which are connected to cantilever beams (3) via artificial plastic hinge units. The ends of the two cantilever beams (3) away from the artificial plastic hinge units are connected to high-strength steel columns (6). The opposite sides of the two high-strength steel columns (6) are connected to column base connecting plates (13). The bottom of the splicing beam (4) is connected to a connecting plate (8). Energy-dissipating support members are connected between the connecting plate (8) and the two column base connecting plates (13).

2. The multi-stage yielding V-shaped braced high-strength steel frame structure according to claim 1, characterized in that, Both of the high-strength steel columns (6) are connected by a node stiffening rib (5) and a column base stiffening rib (9). The node stiffening rib (5) is located at the junction of the high-strength steel column (6) and the cantilever beam (3), and the column base stiffening rib (9) is located near the bottom of the high-strength steel column (6).

3. The multi-stage yielding V-shaped braced high-strength steel frame structure according to claim 1, characterized in that, The artificial plastic hinge unit includes two end plates (14), which are welded to the ends of the splicing beam (4) and the cantilever beam (3) respectively. The flanges of the cantilever beam (3) and the splicing beam (4) are connected by a first high-strength bolt (10) with anti-buckling flange cover plate (1). An artificial plastic hinge is also connected between the two end plates (14).

4. The multi-stage yielding V-shaped braced high-strength steel frame structure according to claim 3, characterized in that, The artificial plastic hinge includes a main ear plate (20), one side of which is connected to the end plate (14) at the end of the cantilever arm (3). The end plate (14) at the end of the splicing beam (4) is welded with two parallel auxiliary ear plates (21). The main ear plate (20) is arranged in parallel between the two auxiliary ear plates (21). The main ear plate (20) and the two auxiliary ear plates (21) are connected by a pin (22).

5. The multi-stage yielding V-shaped braced high-strength steel frame structure according to claim 4, characterized in that, Two perforated energy dissipators (2) are connected between the end plate (14) at the end of the splicing beam (4) and the end plate (14) at the end of the cantilever arm (3) by a second high-strength bolt (11). The main ear plate (20) and the auxiliary ear plate (21) are located between the two perforated energy dissipators (2).

6. The multi-stage yielding V-shaped braced high-strength steel frame structure according to claim 1, characterized in that, The energy-consuming support includes a grooved connecting rod (7) connected to the connecting plate (8) at the bottom of the splicing beam (4) and the column base connecting plate (13), and a damper is connected to the grooved connecting rod (7).

7. The multi-stage yielding V-shaped braced high-strength steel frame structure according to claim 6, characterized in that, The damper includes an outer frame (15), and two pairs of parallel bending plates (17) are connected to the inner edges of the upper and lower sides of the outer frame (15). Shear plates (18) are connected to the inner edges of the upper and lower sides of the outer frame (15), and the shear plates (18) are disposed between the two pairs of bending plates (17). It also includes a connecting steel pipe (16), the outer wall of which is welded to the edge of the shear plate (18) and the bending plate (17), and the pipe body of the connecting steel pipe (16) is connected to the grooved connecting rod (7) by a third high-strength bolt (12).

8. The multi-stage yielding V-shaped braced high-strength steel frame structure according to claim 7, characterized in that, The inner corners of the outer frame (15) are all connected to stiffening ribs (19).

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