Column foot connecting joint with replaceable energy consumption piece and construction method

Abstract

The invention provides a column base connecting joint with replaceable energy consumption parts and a construction method, and relates to the technical field of column base connecting joints. The column foot connecting joint comprises a bearing platform, a double-steel-pipe concrete column, a connecting section and an energy dissipation piece. The double-steel-pipe concrete column comprises an outer steel pipe, an inner steel pipe and a connecting assembly. The connecting assembly comprises a first flange, a plurality of upper connecting steel bars and a plurality of energy consumption bars. A bearing platform connecting piece is arranged on the bearing platform and comprises a second flange and a steel pipe shear key; the lower connecting steel bars are arranged on the second flange and connected with the upper connecting steel bars and the energy consumption bars; the connecting section comprises a high-strength steel plate, an inner restraint plate and a plurality of pairs of steel reinforcements; the energy consumption piece is connected to the second protruding section and the high-strength steel plate. The arc-shaped energy dissipation piece is adopted as a core energy dissipation element, efficient energy dissipation can be achieved through plastic deformation in an earthquake, quick replacement can be achieved only by disassembling bolts after damage, the maintenance cost is remarkably reduced, the maintenance time is remarkably shortened, damage controllability is achieved, and parts can be replaced.

Description

Technical Field

[0001] This invention relates to the field of column base connection node technology, and more specifically, to a column base connection node with replaceable energy-consuming components and a construction method thereof. Background Technology

[0002] In the fields of transportation infrastructure and building engineering, especially in earthquake-prone areas, column base connections serve as crucial force transmission hubs between the superstructure and foundation. Their performance is vital to the overall seismic safety and post-earthquake recoverability of the structure. Traditional column base connection designs mainly include integral cast-in-place connections, rigid connections, hinged connections, or partially embedded connections. Although they can effectively transfer loads under normal use conditions, they are prone to irreversible damage under strong earthquakes, resulting in high repair costs and long repair cycles.

[0003] Although existing technologies include energy-dissipating devices (such as metal yield dampers, friction dampers, and viscous dampers) introduced at column bases to dissipate seismic energy and reduce damage to the main structure through plastic deformation, frictional slip, or fluid viscous resistance of the energy-dissipating elements, these devices are complex in construction, costly to maintain, and difficult to repair and replace after damage. Summary of the Invention

[0004] This invention discloses a column base connection node with replaceable energy-consuming components to solve the above-mentioned problems.

[0005] The present invention adopts the following solution: This application provides a column base connection node with replaceable energy-consuming components, including a foundation, a double steel tube concrete column connected to the foundation, and a connecting section and an energy-consuming component. The double steel tube concrete column includes an outer steel tube, an inner steel tube, and a connecting assembly. The lower end of the inner steel tube extends downward to form a first protruding section. The connecting assembly includes a first flange with a first channel adapted to the inner steel tube, a plurality of upper connecting steel bars surrounding and connected to the first flange, and a plurality of energy-consuming bars. The first flange connects the outer steel tube and the inner steel tube, and the outer steel tube is positioned at the lower end of the first flange to form a second protruding section. The support platform is provided with a support platform connector, which includes a second flange, a steel pipe shear key adapted to the first protruding section and connected to the middle of the second flange; and a plurality of lower connecting steel bars provided on the second flange, the upper ends of the lower connecting steel bars being connected to the upper connecting steel bars and the lower ends of the energy dissipation rod. The connecting section includes a high-strength steel plate adapted to the outer steel pipe, an inner constraint plate connected to the inner side of the upper end of the high-strength steel plate and the inner side of the second protruding section by high-strength bolts, and multiple pairs of steel reinforcing members connected to the inner and outer sides of the high-strength steel plate and the second protruding section by high-strength bolts; the bottom of the high-strength steel plate is welded to the second flange; the outer steel pipe and the high-strength steel plate are filled with concrete; The energy-consuming component is connected to the second protruding section and the high-strength steel plate by high-strength bolts; it includes an energy-consuming plate and an outer constraint plate; the energy-consuming plate includes an upper connecting part, a lower connecting part, and an arc-shaped energy-consuming part connected between the upper connecting part and the lower connecting part.

[0006] Furthermore, a shear key is connected to the outer wall of the first protruding segment.

[0007] Furthermore, a pad is also connected to the lower inner side of the high-strength steel plate by high-strength bolts.

[0008] Furthermore, it also includes multiple long screws, which are respectively inserted into the second protruding section, the outer constraint plate, the inner constraint plate, and the high-strength steel plate.

[0009] Furthermore, the bearing platform connector is also provided with a third flange connected to the bottom of the steel pipe shear key; the second flange is provided with a second channel in the middle that is adapted to the steel pipe shear key, and the second flange is sleeved and connected to the steel pipe shear key; a plurality of spring damping components are provided between the second flange and the third flange.

[0010] Furthermore, the third flange is also provided with a plurality of stiffening connectors, which are arranged to form a limiting groove that is adapted to the shear key of the steel pipe.

[0011] Furthermore, the spring damper includes a steel sleeve, a pad movably disposed within the upper end of the steel sleeve, a base plate connected to the lower end of the steel sleeve, a steel sleeve nut connected to the upper end of the pad, a lower connecting plate connected to the base plate and disposed within the steel sleeve, a spring disposed within the lower end of the steel sleeve and connected to the lower connecting plate, and an upper connecting plate connected to the upper end of the spring; an anchoring rebar threaded through the base plate, the lower connecting plate, the upper connecting plate, the pad, and the steel sleeve nut; the upper end of the anchoring rebar protrudes from the upper end of the steel sleeve nut and has threads for connecting with the upper connecting rebar.

[0012] Furthermore, the lower end of the anchoring steel bar has a bent section.

[0013] Furthermore, a first casting cavity with an upper opening is formed between the outer steel pipe, the inner steel pipe, and the first flange; a second casting cavity is formed between the second protruding section, the high-strength steel plate, the second flange, the first protruding section, and / or the steel pipe shear key, and a grout outlet is provided on the upper side wall of the second protruding section, and a grouting port is provided on the high-strength steel plate.

[0014] This application also provides a construction method for a column base connection node with replaceable energy-consuming components, characterized by the following construction steps: First, the connecting assembly, the connecting section, and the bearing platform connector are prefabricated in the prefabrication plant; wherein, the upper connecting steel bar and the energy dissipation rod of the connecting assembly are fixed to the first flange by steel sleeves and high-strength nuts; Then, the first flange of the connecting assembly is welded between the outer steel pipe and the inner steel pipe, and concrete is poured into the first pouring cavity through the top opening to form the double steel pipe concrete column. Erect a formwork for the foundation at the construction site, fix the foundation connectors, and then pour concrete to form the foundation. The inner constraint plate of the connecting section is connected to the inner side of the second protruding section by high-strength bolts; then the double steel pipe concrete column is hoisted to the corresponding position of the foundation, and the high-strength steel plate of the connecting section is welded to the second flange; then the energy-consuming component is connected to the second protruding section and the high-strength steel plate by high-strength bolts. Concrete is poured into the second pouring cavity through the grouting port.

[0015] By adopting the above technical solution, the present invention can achieve the following technical effects: 1. An arc-shaped energy-dissipating component is used as the core energy-dissipating element. It is fixed to the outside of the column base by bolts, steel pipes and high-strength steel plates. The arc-shaped energy-dissipating component can efficiently dissipate energy through plastic deformation during an earthquake. After damage, it can be quickly replaced by simply removing the bolts, which significantly reduces maintenance costs and time, and achieves "controllable damage and replaceable parts". 2. It integrates a triple collaborative energy dissipation mechanism. The arc-shaped energy dissipation component acts as the first line of defense, first undergoing plastic deformation to absorb the main energy; the energy dissipation rod penetrating the column and the foundation provides a secondary energy dissipation path through axial yielding; and the spring damping component with built-in preloaded spring and limiting baffle provides elastic restoring force. These three mechanisms are activated in stages and work together under seismic action to efficiently disperse and dissipate the seismic input energy, thereby maximizing the protection of the main structure from irreversible damage and significantly improving the overall seismic performance and structural safety of the nodes.

[0016] 3. The prefabricated high-efficiency construction technology is adopted. The precast double steel pipe concrete columns, connecting sections and foundation connectors are all prefabricated in the factory in a standardized manner, making the quality easy to control. On-site, the triple flange plates are precisely aligned, and high-strength bolts and threaded rods are used for modular assembly. The core connection area is grouted with UHPC material to ensure compactness. The design of the grouting holes and outlet holes enables visual quality control of the grouting process. This greatly reduces the amount of wet work and curing time on-site, significantly improves construction efficiency, and ensures the reliability and consistency of the overall performance of the nodes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a column base connection node structure for a replaceable energy-consuming component according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a double steel tube concrete column structure with a column base connection node for replaceable energy-consuming components according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the connection component structure of a double steel tube concrete column with a column base connection node for replaceable energy-consuming components according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the support structure of a column base connection node with replaceable energy-consuming components according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the support frame connector structure of a column base connection node with replaceable energy-consuming components according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the first flange, the second flange, and the third flange of a column base connection node with a replaceable energy-consuming component according to an embodiment of the present invention. Figure 7 This is a schematic diagram of a spring damping component structure for a column base connection node with a replaceable energy-consuming component according to an embodiment of the present invention. Figure 8 This is a schematic diagram of the connection section structure of a column base connection node for a replaceable energy-consuming component according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the energy-consuming plate and the outer constraint plate of the energy-consuming component of the column foot connection node with replaceable energy-consuming component according to an embodiment of the present invention. Figure 10 This is a schematic diagram of the assembly structure of a column base connection node with replaceable energy-consuming components hidden in a high-strength steel plate according to an embodiment of the present invention. Figure 11 This is a schematic diagram of a column base connection node with replaceable energy-consuming components according to an embodiment of the present invention, without the energy-consuming components installed. Icons: 1. Double steel pipe concrete column; 2. Connecting section; 3. Energy dissipation component; 4. Outer steel pipe; 5. Inner steel pipe; 6. Foundation; 7. Outer angle steel reinforcement; 8. Shear stud; 9. First bolt hole; 10. Second bolt hole; 11. First bolt hole; 12. First flange; 13. Upper connecting reinforcement; 14. Energy dissipation rod; 15. Second flange; 16. Steel pipe shear key; 17. Lower connecting reinforcement; 18. Second hole; 19. Third flange; 20. Stiffening connector; 21. Spring damping component; 22. Steel sleeve; 23. Spacer block; 24. Base plate; 25. Steel sleeve nut; 26. Lower connecting plate; 27. Spring; 28. Upper connecting plate. 9. Anchoring steel bar 30. High-strength steel plate 31. Third bolt hole 32. Inner restraint plate 33. Seventh bolt hole 34. Washer plate 35. Fourth bolt hole 36. Inner angle steel reinforcement 37. Long screw 38. Energy dissipation plate 39. Outer restraint plate 40. First upper connection part 41. First lower connection part 42. Arc-shaped energy dissipation part 43. Second upper connection part 44. Second lower connection part 45. Transition part 46. Fifth bolt hole 47. Sixth bolt hole 48. Eighth bolt hole 49. Second screw hole 50. Third screw hole 51. UHPC concrete 52. Grout outlet 53. Grouting port 54. Detailed Implementation

[0018] Example Combination Figures 1 to 11 As shown, this embodiment provides a column base connection node with replaceable energy-consuming components, including a foundation 6, a double steel pipe concrete column 1 connected to the foundation 6, and also including a connecting section 2 and an energy-consuming component 3. Specifically, in this example, such as Figure 2 , Figure 3 and Figure 6 As shown, the double-steel-tube concrete column 1 includes a square outer steel tube 4, an inner steel tube 5, and a connecting assembly; the lower end of the inner steel tube 5 extends downward to form a first protruding section, and shear studs 8 are connected to the outer wall of the first protruding section; the connecting assembly includes a first flange 13 having a first channel 12 adapted to the inner steel tube 5, a plurality of upper connecting steel bars 14 surrounding the first channel 12 and fixed to the first flange 13 by a steel sleeve and a high-strength nut, and a plurality of energy-consuming bars 15; the first flange 13 is welded between the outer steel tube 4 and the inner steel tube 5, and the outer steel tube 4 is positioned at the lower end of the first flange 13 to form a second protruding section; two rows of first bolt holes 9 are provided on the second protruding section; and a second bolt hole 10 is also provided below the first bolt hole 9, and first screw holes 11 are provided on both sides of the second bolt hole 10; like Figures 4 to 6As shown, the support platform 6 is provided with a support platform connector, which includes a second flange 16, connected to a steel pipe shear key 17 adapted to the first protruding section in the middle of the second flange 16; a second channel 19 adapted to the steel pipe shear key 17 is provided in the middle of the second flange 16, and the second flange 16 is sleeved and connected to the steel pipe shear key 17 through the second channel 19; a third flange 20 is also connected to the bottom of the steel pipe shear key 17; a plurality of stiffening connectors 21 are provided on the third flange 20, which are welded to the third flange 20 to form a limiting groove adapted to the steel pipe shear key 17; a plurality of lower connecting steel bars 18 are passed through the second flange 16 and the third flange 20, which surround the steel pipe shear key 17, and their upper ends are connected to the upper connecting steel bars 14 and the lower end of the energy dissipation rod 15 through steel sleeves.

[0019] A plurality of spring damping elements 22 are provided between the second flange 16 and the third flange 20; such as Figure 7 As shown, the spring damper 22 includes a steel sleeve 23, a pad 24 movably disposed within the upper end of the steel sleeve 23, a base plate 25 connected to the lower end of the steel sleeve 23, a steel sleeve nut 26 welded to the upper end of the pad 24, a lower connecting plate 27 connected to the base plate 25 and disposed within the steel sleeve 23, a spring 28 disposed within the steel sleeve 23 and connected at its lower end to the lower connecting plate 27, and an upper connecting plate 29 connected to the upper end of the spring 28 and disposed below the pad 24; an anchoring steel bar 30 passing through the base plate 25, the lower connecting plate 27, the upper connecting plate 29, and the pad 24, and screwed to the steel sleeve nut 26, wherein the lower end of the anchoring steel bar 30 has a bent section for better shear force transmission; the upper end of the anchoring steel bar 30 protrudes from the upper end of the steel sleeve nut 26 and has threads for connecting with the upper connecting steel bar 14. The threaded connection between the anchoring steel bar 30 and the steel sleeve nut 26 allows adjustment of the preload of the spring 28 to adapt to different seismic requirements. A baffle is also welded inside the steel sleeve 23 to limit the displacement of the spring 28. Specifically, a pre-drilled channel is provided inside the baffle. The diameter of the pre-drilled channel is designed to allow the spring 28 to freely expand and contract in the vertical direction, but the diameter must be smaller than the diameter of the upper connecting plate 29 to limit the vertical displacement of the upper connecting plate 29 and prevent excessive deformation and failure of the spring 28.

[0020] like Figure 8As shown, the connecting section 2 includes four high-strength steel plates 31 that, after being installed, are adapted to the outer steel pipe 4; a third bolt channel 32 is provided on the upper side of the high-strength steel plate 31, and second bolt channels 50 are also provided on both sides of the third bolt channel 32; a seventh bolt channel 34 corresponding to the second bolt channel 10 and the third bolt channel 32 is provided on the inner constraint plate 33, and is connected by high-strength bolts, and is placed on the upper end of the high-strength steel plate and the inner side of the second protruding section; a pad 35 is also connected to the lower inner side of the high-strength steel plate 31 by high-strength bolts, and the bottom of the high-strength steel plate is welded to the second flange 16, and two rows of fourth bolt channels 36 are provided at its bottom. (See Figure 1 and...) Figure 10 As shown, four pairs of steel reinforcing members are connected to the four corners of the column base; these include inner angle steel reinforcing members 37 and outer angle steel reinforcing members 7, which are connected to the first bolt hole 9 and the fourth bolt hole 36 by high-strength bolts, respectively placed on the inner and outer sides of the high-strength steel plate and the second protruding section.

[0021] The energy-consuming component 3 is connected to the second protruding section and the high-strength steel plate by high-strength bolts; specifically, as shown in the figure Figure 9 As shown, the energy-consuming component 3 includes an energy-consuming plate 39 and an outer constraint plate 40. The energy-consuming plate 39 includes a first upper connecting portion 41, a first lower connecting portion 42, and an arc-shaped energy-consuming portion 43 connecting the upper connecting portion and the lower connecting portion. The outer constraint plate 40 includes a second upper connecting portion 44 adapted to the first upper connecting portion 41, a second lower connecting portion 45 adapted to the first lower connecting portion 42, and a transition portion 46 connecting the second upper connecting portion 44 and the second lower connecting portion 45. The upper connecting portion is provided with a fifth bolt hole 47 corresponding to the first bolt hole 9, and the lower connecting portion is provided with a sixth bolt hole 48 corresponding to the fourth bolt hole 36, and they are connected by high-strength bolts. The transition section 46 has an eighth bolt channel 49 in the middle, corresponding to the second bolt channel 10 and the third bolt channel 32, and is connected by the high-strength bolts. The eighth bolt channel 49 has third bolt channels 51 on both sides, corresponding to the first bolt channel 11 and the second bolt channel 50, and long bolts 38 are inserted through them. The locking of the long bolts 38 provides pre-tightening force so that the double steel tube concrete column 1 and the connecting section 2 form an integral force-bearing system, thereby improving the lateral stiffness of the node.

[0022] A first casting cavity with an upper opening is formed between the outer steel pipe 4, the inner steel pipe 5, and the first flange 13; a second casting cavity is formed between the second protruding section, the high-strength steel plate 31, the second flange 16, the first protruding section, and / or the steel pipe shear key 17, and a grout outlet 53 is provided on the upper side wall of the second protruding section, and a grouting port 54 is provided on the high-strength steel plate 31. UHPC concrete 52 is poured into the first casting cavity through the upper opening; UHPC concrete 52 is poured into the second casting cavity through the grouting port 54.

[0023] The above describes the energy-consuming component 3 as the core energy-consuming element, which is fixed to the outside of the column base by bolts, steel pipes and high-strength steel plates. Its arc-shaped energy-consuming plate 39 can efficiently dissipate energy through plastic deformation during an earthquake, and can be quickly replaced by simply removing the bolts after damage, which significantly reduces maintenance costs and time, and achieves "controllable damage and replaceable parts".

[0024] The arrangement of energy-dissipating component 3, energy-dissipating rod 15, and spring damping component 22 forms a triple synergistic energy dissipation mechanism. The arc-shaped energy-dissipating component 3 acts as the first line of defense, undergoing plastic deformation to absorb the main energy. The energy-dissipating rod 15, which runs through the column and the foundation 6, provides a secondary energy dissipation path through axial yielding. The spring damping component 22 provides elastic restoring force. These three mechanisms are activated in stages and work together under seismic action to efficiently disperse and dissipate the seismic input energy, thereby maximizing the protection of the main structure from irreversible damage and significantly improving the overall seismic performance and structural safety of the nodes.

[0025] Furthermore, the technical solution of this application adopts prefabricated high-efficiency construction technology. The precast double steel pipe concrete column 1, connecting section 2, and foundation connectors are all prefabricated in the factory in a standardized manner, making quality easy to control. On-site, the triple flange plates are precisely aligned, and high-strength bolts and threaded rods are used for modular assembly. The core connection area is grouted with UHPC material to ensure compactness, and the design of its grouting holes and outlet holes enables visual quality control of the grouting process. This significantly reduces the amount of on-site wet work and curing time, significantly improves construction efficiency, and ensures the reliability and consistency of the overall performance of the joint.

[0026] A construction method for the column base connection node of the replaceable energy-consuming component 3 includes the following construction steps: First, the connecting components, the connecting section 2, and the pier connector are prefabricated in the prefabrication plant; The connecting assembly uses a steel sleeve and a high-strength nut to fix the upper connecting steel bar 14 and the energy dissipation rod 15 to the first flange 13. The connecting section 2 places the seventh bolt hole 34 on the inner constraint plate 33 in a corresponding position with the second bolt hole 10 and the third bolt hole 32, and connects them with high-strength bolts. It is placed on the upper end of the high-strength steel plate and the inner side of the second protruding section; the bolt holes on the four inner angle steel reinforcing members 37 are aligned with the fourth bolt hole 36 and connected with high-strength bolts. The foundation connector is constructed by first welding multiple stiffening connectors 21 around the third flange 20 to form a limiting groove that matches the steel pipe shear key 17; then welding the second flange 16 through it onto the steel pipe shear key 17; finally, fitting the bottom end of the steel pipe shear key 17 into the limiting groove, and welding the third flange 20 to the steel pipe shear key 17; and finally, assembling multiple lower connecting reinforcing bars 18 around the steel pipe shear key 17, and welding them through it onto the second flange 16 and the third flange 20. Then, the first flange 13 of the connecting assembly is welded between the outer steel pipe 4 and the inner steel pipe 5, and concrete is poured into the first pouring cavity through the top opening to form the double steel pipe concrete column 1; of course, this pouring step can be pre-poured in the prefabrication plant or poured on the construction site. A formwork for pouring the foundation 6 is erected at the construction site, the foundation connectors are fixed, and then concrete is poured to form the foundation 6. The lever concrete column is hoisted to a position compatible with the foundation 6; the upper connecting steel bar 14 and the energy dissipation bar 15 are connected to the lower connecting steel bar 18 and the anchoring steel bar 30 through the steel sleeve; the inner constraint plate 33 of the connecting section 2 is placed inside the second protruding section so that the eighth bolt hole 49 corresponds to the second bolt hole 10, the bolt holes on the inner angle steel reinforcement 37 correspond to the first bolt hole 9, and are connected by high-strength bolts; the bolt holes on the outer angle steel reinforcement 7 are set to correspond to the first bolt hole 9 and the fourth bolt hole 36, and are connected by high-strength bolts; the four high-strength steel plates 31 are welded together along adjacent sides, and then firmly welded to the top surface of the second flange 16 plate; The fifth bolt hole 47 on the upper connecting part and the sixth bolt hole 48 on the lower connecting part of the energy-consuming component 3 are respectively arranged to correspond with the first bolt hole 9 and the fourth bolt hole 36. The sixth bolt hole 48 is arranged to correspond with the second bolt hole 10 and the third bolt hole 32, and is connected by the high-strength bolt. The third screw hole 51 is provided with a long screw 38 corresponding to the first screw hole 11 and the second screw hole 50. Finally, concrete is poured into the second pouring cavity through the grouting port 54; grouting is stopped when the UHPC material slurry flows steadily out of the two grout outlets.

[0027] It should be understood that the above are merely preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions that fall within the scope of the present invention are within the scope of protection of the present invention.

[0028] The accompanying drawings used in the above description of the embodiments only illustrate certain embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

Claims

1. A column base connection node with replaceable energy-consuming components, comprising a foundation (6) and a double steel tube concrete column (1) connected to the foundation (6), characterized in that, It also includes a connecting section (2) and an energy-consuming component (3); the double steel pipe concrete column (1) includes an outer steel pipe (4), an inner steel pipe (5) and a connecting assembly; the lower end of the inner steel pipe (5) extends downward to form a first protruding section; the connecting assembly includes a first flange (13) having a first channel (12) adapted to the inner steel pipe (5), a plurality of upper connecting steel bars (14) surrounding and connected to the first flange (13) and a plurality of energy-consuming bars (15); the first flange (13) is connected between the outer steel pipe (4) and the inner steel pipe (5), and the outer steel pipe (4) is placed at the lower end of the first flange (13) to form a second protruding section; The foundation (6) is provided with a foundation connector, which includes a second flange (16), a steel pipe shear key (17) adapted to the first protruding section in the middle of the second flange (16), and a plurality of lower connecting steel bars (18) provided on the second flange (16), the upper end of the lower connecting steel bars (18) being connected to the lower end of the upper connecting steel bars (14) and the energy dissipation rod (15); The connecting section (2) includes a high-strength steel plate (31) adapted to the outer steel pipe (4), an inner constraint plate (33) connected to the inner side of the upper end of the high-strength steel plate and the inner side of the second protruding section by high-strength bolts, and multiple pairs of steel reinforcing members connected to the inner and outer sides of the high-strength steel plate and the second protruding section by high-strength bolts; the bottom of the high-strength steel plate is welded to the second flange (16); the outer steel pipe (4) and the high-strength steel plate (31) are filled with concrete; The energy-consuming component (3) is connected to the second protruding section and the high-strength steel plate by high-strength bolts; it includes an energy-consuming plate (39) and an outer constraint plate (40); the energy-consuming plate (39) includes an upper connecting part, a lower connecting part, and an arc-shaped energy-consuming part (43) connected between the upper connecting part and the lower connecting part.

2. The column base connection node for the replaceable energy-consuming component according to claim 1, characterized in that, A shear key is connected to the outer wall of the first protruding section.

3. The column base connection node for the replaceable energy-consuming component according to claim 1, characterized in that, The lower inner side of the high-strength steel plate (31) is also connected to a pad (35) by high-strength bolts.

4. The column base connection node for the replaceable energy-consuming component according to claim 1, characterized in that, It also includes a plurality of long screws (38), which are respectively inserted into the second protruding section, the outer constraint plate (40), the inner constraint plate (33), and the high-strength steel plate (31).

5. The column base connection node for replaceable energy-consuming components according to claim 1, characterized in that, The pier connector is also provided with a third flange (20) connected to the bottom of the steel pipe shear key (17); the second flange (16) is provided with a second channel (19) adapted to the steel pipe shear key (17) in the middle, and the second flange (16) is sleeved and connected to the steel pipe shear key (17); a plurality of spring damping components (22) are provided between the second flange (16) and the third flange (20).

6. The column base connection node for the replaceable energy-consuming component according to claim 5, characterized in that, The third flange (20) is also provided with a plurality of stiffening connectors (21), which are arranged to form a limiting groove that is compatible with the steel pipe shear key (17).

7. The column base connection node for the replaceable energy-consuming component according to claim 5, characterized in that, The spring damper (22) includes a steel sleeve (23), a pad (24) movably disposed in the upper end of the steel sleeve (23), a base plate (25) connected to the lower end of the steel sleeve (23), a steel sleeve nut (26) connected to the upper end of the pad (24), a lower connecting plate (27) connected to the base plate (25) and placed in the steel sleeve (23), a spring (28) disposed in the lower end of the steel sleeve (23) and connected to the lower connecting plate (27), and an upper connecting plate (29) connected to the upper end of the spring (28); an anchoring steel bar (30) threaded through the base plate (25), the lower connecting plate (27), the upper connecting plate (29), the pad (24) and the steel sleeve nut (26); the upper end of the anchoring steel bar (30) protrudes from the upper end of the steel sleeve nut (26) and has threads for connecting with the upper connecting steel bar (14).

8. The column base connection node for the replaceable energy-consuming component according to claim 7, characterized in that, The lower end of the anchoring steel bar (30) has a bent section.

9. The column base connection node for the replaceable energy-consuming component according to any one of claims 5-8, characterized in that, A first casting cavity with an upper opening is formed between the outer steel pipe (4), the inner steel pipe (5), and the first flange (13); a second casting cavity is formed between the second protruding section, the high-strength steel plate (31), the second flange (16), the first protruding section, and / or the steel pipe shear key (17), and a grout outlet (53) is provided on the upper side wall of the second protruding section, and a grouting port (54) is provided on the high-strength steel plate (31).

10. A construction method for a column base connection node with replaceable energy-consuming components as described in claim 9, characterized in that, The construction steps include the following: First, the connecting assembly, the connecting section (2), and the pier connector are prefabricated in the prefabrication plant; wherein, the upper connecting steel bar (14) and the energy dissipation rod (15) of the connecting assembly are fixed to the first flange (13) by steel sleeves and high-strength nuts; Then, the first flange (13) of the connecting assembly is welded between the outer steel pipe (4) and the inner steel pipe (5), and concrete is poured into the first pouring cavity through the upper opening to form the double steel pipe concrete column (1). Erect a foundation (6) at the construction site, pour a formwork, fix the foundation connectors, and then pour concrete to form the foundation (6). The inner constraint plate (33) of the connecting section (2) is connected to the inner side of the second protruding section by high-strength bolts; then the double steel pipe concrete column (1) is hoisted to the corresponding position of the foundation (6), and the high-strength steel plate (31) of the connecting section (2) is welded to the second flange (16); then the energy-consuming component (3) is connected to the second protruding section and the high-strength steel plate by high-strength bolts; Concrete is poured into the second pouring cavity through the grouting port (54).

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