Fabricated stainless steel-FRP concrete filled steel tube composite column energy consumption connection node

Abstract

The invention provides an assembly type stainless steel-FRP (fiber reinforced plastic) steel tube concrete composite column connecting node, which relates to the technical field of assembly type steel tube composite column connecting structures, and is characterized by comprising a connecting assembly, annular end plates fixed at two ends of the connecting assembly, and an energy consumption assembly fixed on a condensation assembly, the connecting assembly comprises transverse webs, longitudinal webs and a butt joint sleeve, the transverse webs and the longitudinal webs are perpendicularly arranged between the annular end plates, a plurality of steel bar holes are formed in the transverse webs and the longitudinal webs, the butt joint sleeve is arranged in the center of the connecting assembly, and the transverse webs and the longitudinal webs are fixed to the peripheral side of the butt joint sleeve. The energy dissipation assembly comprises reset plates and self-reset vibration isolation springs, reset keys are arranged between the transverse webs, the reset plates are perpendicularly fixed between the longitudinal webs, and the self-reset vibration isolation springs are arranged between the reset plates. And in addition, the construction technology is simple, the quality is easy to control, and low carbon and environmental protection are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of assembled steel tube composite column connection structures, and in particular to an assembled stainless steel-FRP steel tube concrete composite column connection node. Background Art

[0002] Prefabricated structures are the current development trend in the field of engineering structures. Prefabricated structures can realize industrialized prefabrication production in prefabrication sites, so they have obvious advantages in construction quality, construction period guarantee, green energy saving, and carbon emission reduction, which is in line with my country's green sustainable and high-quality development direction. Promote the development of new prefabricated structures, accelerate the popularization of intelligent construction and building industrialization, and accelerate the transformation and upgrading of domestic engineering structures. At present, steel tube concrete composite columns have obvious mechanical properties and durability advantages compared with ordinary concrete columns, so steel tube concrete composite columns have developed rapidly in my country in recent years. However, the steel casing in steel tube concrete composite columns is not resistant to corrosion and high temperature in fire, which limits its application scope. Compared with steel tube concrete composite columns, stainless steel-FRP steel tube concrete composite columns have obvious advantages in harsh and complex environments such as corrosion resistance and high temperature in fire. Therefore, stainless steel-FRP steel tube concrete composite columns have broad application prospects, and the composite column beam-column connection node has complex force and a large number of connection components. The characteristics play a controlling role in the overall performance of the structure. The quality of the connection node will directly affect the safety of the overall structure after the composite column is built. Therefore, proposing a safe and reliable connection node with sufficient strength and stiffness, good seismic performance, wide range of applications, simple construction and low cost is a technical problem that urgently needs to be solved in the development of composite columns.

[0003] The Chinese invention patent with the authorization number CN209556237U provides a composite column connection node, including an upper composite column, a lower composite column, a composite floor and a connecting steel bar assembly; the upper composite column and the lower composite column both include a prefabricated column shell and a cast-in-place part, one end of the prefabricated floor slab is erected on the prefabricated column shell of the lower composite column, the upper composite column is located on the lower composite column, the cast-in-place part of the lower composite column, the cast-in-place part of the upper composite column and the cast-in-place layer of the floor slab are connected as a whole by pouring concrete, and a connecting steel bar assembly is arranged at the butt joint of the upper composite column and the lower composite column to ensure the connection strength of the connection node, the upper composite column and the lower composite column both include a prefabricated column shell and a cast-in-place part, and the prefabricated column shell can be produced in advance in the factory, and a structural steel bar assembly is embedded in the prefabricated column shell to ensure the structural strength of the composite column. The use of prefabricated column shells can reduce the demand for templates for on-site construction, improve construction efficiency, and also increase the occupancy rate of prefabricated types.

[0004] However, the composite column connection node provided by the above patent has problems of insufficient connection strength and complex construction in areas prone to earthquakes, so it is necessary to provide a solution to improve this problem. Summary of the invention

[0005] The purpose of the present invention is to provide an assembled stainless steel-FRP steel tube concrete composite column connection node, which can enhance the strength of the connection component, has a simple construction process, is easy to control quality, and is low-carbon and environmentally friendly.

[0006] The present invention provides an assembled stainless steel-FRP steel tube concrete composite column connection node, including a connection component, and annular end plates fixed at both ends of the connection component, and also including an energy dissipation component fixed on the solidification component, the connection component includes a transverse web, a longitudinal web, and a docking sleeve, the multiple transverse webs and the longitudinal webs are vertically arranged between the annular end plates, and the transverse webs and the longitudinal webs are provided with a plurality of steel bar holes, the docking sleeve is arranged at the center of the connection component, and the transverse web and the longitudinal web are fixed on the circumference of the docking sleeve, the energy dissipation component includes a reset plate, a transverse self-resetting vibration isolation spring and a longitudinal self-resetting vibration isolation spring, a transverse self-resetting vibration isolation spring is arranged between the transverse webs, the reset plate is vertically fixed between the longitudinal webs, and a longitudinal self-resetting vibration isolation spring is arranged between the reset plates.

[0007] By adopting the above technical scheme, by symmetrically arranging two groups of vertical self-resetting vibration isolation springs and two groups of transverse self-resetting vibration isolation springs on both sides of the transverse and longitudinal webs of the connecting assembly, the seismic and wind resistance of the connecting assembly can be effectively improved, the energy dissipation capacity of the connecting assembly can be enhanced, the structure can meet the three-level seismic fortification standards, and ensure that the structure follows the seismic fortification goals of not being damaged by small earthquakes, being repairable by medium earthquakes, and not collapsing by large earthquakes during its service life, so that the application range of stainless steel-FRP steel tube concrete composite columns is wider. By symmetrically arranging two groups of vertical self-resetting vibration isolation springs and two groups of transverse self-resetting vibration isolation springs on both sides of the transverse and longitudinal webs of the connecting assembly, the seismic and wind resistance of the connecting assembly can be effectively improved, the energy dissipation capacity of the connecting assembly can be enhanced, the structure can meet the three-level seismic fortification standards, and ensure that the structure follows the seismic fortification goals of not being damaged by small earthquakes, being repairable by medium earthquakes, and not collapsing by large earthquakes during its service life, so that the application range of stainless steel-FRP steel tube concrete composite columns is wider.

[0008] Optionally, a rubber ring is provided on the inner wall of the docking sleeve.

[0009] By adopting the above technical solution, the rubber ring is used to seal the built-in FRP pipe of the composite column to prevent leakage when the composite column concrete is poured.

[0010] Optionally, bolt holes are respectively provided around the docking sleeve, and the bolt holes penetrate the longitudinal web and the transverse web fixed on the docking sleeve.

[0011] By adopting the above technical solution, the built-in FRP tube connection with the stainless steel-FRP steel tube concrete composite column below the connecting assembly is completed at the sealing rubber ring in the middle of the docking sleeve, and at the same time, the bolts located in the upper half of the docking sleeve are tightened along the direction of the bolt hole, so that the FEP tube can be fixed on the docking sleeve.

[0012] Optionally, the outer wall of the annular end plate is provided with an external convex thread.

[0013] By adopting the above technical solution, the external convex thread on the outside of the annular end plate can be connected to the external stainless steel pipe, so as to quickly fix the connection component.

[0014] Optionally, vertical reinforcing ribs are provided between the annular end plates.

[0015] By adopting the above technical solution, the vertical reinforcing ribs between the annular end plates can enhance the compressive performance of the connection assembly.

[0016] Optionally, rubber gaskets are provided on the external convex threads of the upper and lower annular end plates.

[0017] By adopting the above technical solution, the external convex straight threads arranged on the upper and lower end plates in the connecting assembly are covered with rubber gaskets to prevent the external stainless steel pipe of the composite column from being directly contacted with the connecting assembly when the two different materials are mechanically connected, thereby aggravating the corrosion of the connecting assembly.

[0018] In summary, the present application includes at least one of the following beneficial technical effects:

[0019] The connection node proposed in this application effectively solves the technical problem of connecting the inner and outer casings of stainless steel-FRP steel tube concrete composite columns. At the same time, the connection node in this application has a wide range of applications and is suitable for connecting other types of steel tube concrete composite columns, providing an effective technical solution for the connection construction of steel tube concrete composite columns.

[0020] Holes are reserved in the transverse and longitudinal webs of the connection nodes for the longitudinal connecting steel bars of the concrete to pass through, ensuring the positioning of the connection nodes and making the force transmission of the structural beams and columns more reliable, effectively enhancing the overall mechanical properties of the structure after completion.

[0021] Symmetrically arranged vertical self-resetting vibration isolation springs and transverse self-resetting vibration isolation springs are set to enhance the energy dissipation capacity of the connection nodes, improve the seismic and wind resistance of the structure after completion, and give the structure greater advantages in terms of shock absorption, vibration relief, and stable operation. After the structure is completed, it meets the three-level seismic fortification standards, ensuring that the structure follows the seismic fortification goals of not being damaged by small earthquakes, being repairable by medium earthquakes, and not collapsing by large earthquakes during its service life, making the application range of stainless steel-FRP steel tube concrete composite columns wider.

[0022] The connection nodes realize the construction method of fully mechanical connection of the inner and outer casings of the stainless steel-FRP steel tube concrete composite columns, avoiding welding at the construction site. The construction process is simple, the quality is easy to control, and it is low-carbon and environmentally friendly, which is in line with the green and sustainable development construction concept.

[0023] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the overall structure of an assembled stainless steel-FRP steel tube concrete composite column connection node provided by the present invention.

[0025] Figure 2 A schematic diagram of the local structure of a prefabricated stainless steel-FRP steel tube concrete composite column connection node provided by the present invention.

[0026] Figure 3 A schematic diagram of a transverse web of a connection node of an assembled stainless steel-FRP steel tube concrete composite column provided by the present invention.

[0027] Figure 4 A schematic diagram of a longitudinal web of a connection node of an assembled stainless steel-FRP steel tube concrete composite column provided by the present invention.

[0028] Explanation of the reference numerals: 1. Connecting assembly; 2. Transverse web; 3. Longitudinal web; 4. Docking sleeve; 5. Annular end plate; 6. Longitudinal self-resetting vibration isolation spring; 7. Transverse self-resetting vibration isolation spring; 8. External convex thread; 9. Longitudinal connecting steel bar hole; 10. Transverse connecting steel bar hole; 11. Reset plate; 12. Bolt hole; 13. Vertical reinforcement rib; 14. Rubber ring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0030] An embodiment of the present invention provides an assembled stainless steel-FRP steel tube concrete composite column connection node, including a connection component 1, and annular end plates 5 fixed at both ends of the connection component 1, and also including an energy dissipation component fixed on the solidification component, the connection component 1 includes a transverse web 2, a longitudinal web 3, and a docking sleeve 4, the multiple transverse webs 2 and the longitudinal webs 3 are vertically arranged between the annular end plates 5, and the transverse webs 2 and the longitudinal webs 3 are provided with multiple steel bar holes, the docking sleeve 4 is arranged at the center of the connection component 1, and the transverse webs 2 and the longitudinal webs 3 are fixed on the surrounding side of the docking sleeve 4, the energy dissipation component includes a reset plate 11, a transverse self-resetting vibration isolation spring 7 and a longitudinal self-resetting vibration isolation spring 6, a transverse self-resetting vibration isolation spring 7 is arranged between the transverse webs 2, the reset plate 11 is vertically fixed between the longitudinal webs 3, and a longitudinal self-resetting vibration isolation spring 6 is arranged between the reset plates 11.

[0031] See also Figure 1 Figure 2 Figure 3 Figure 4 By symmetrically arranging two groups of vertical self-resetting vibration isolation springs and two groups of transverse self-resetting vibration isolation springs 7 on both sides of the transverse and longitudinal webs 3 of the connection component 1, the seismic and wind resistance performance of the connection component 1 can be effectively improved, the energy dissipation capacity of the connection component 1 can be enhanced, the structure can meet the three-level seismic fortification standard, and ensure that the structure follows the seismic fortification goals of not being damaged by small earthquakes, being repairable by medium earthquakes, and not collapsing by large earthquakes during its service life, so that the stainless steel-FRP steel tube concrete composite column has a wider application range. In the connection component 1, 8 longitudinal connecting steel bar holes 9 and transverse connecting steel bar holes 10 for passing through the top of the composite column are symmetrically opened on the transverse webs 2 and the longitudinal webs 3, and the size specification of the reserved steel bar holes is φ 18, φ20, φ22, the spacing between holes and the distance from the hole to the web are both greater than 1.5 times the hole diameter. The two groups of vertical self-resetting vibration isolation springs in the connection assembly 1 can effectively absorb the energy generated by the longitudinal earthquake wave, and the two groups of transverse self-resetting vibration isolation springs 7 in the connection assembly 1 can effectively absorb the energy generated by the transverse earthquake wave, thereby avoiding the failure of the nodes under the action of the earthquake and causing the overall destruction of the structure, effectively improving the overall seismic performance of the structure, making the structure meet the three-level seismic fortification standards, ensuring that the structure follows the seismic fortification goals of not being damaged by small earthquakes, being repairable by medium earthquakes, and not collapsing by large earthquakes during its service life, so that the stainless steel-FRP steel tube concrete composite column has a wider application range.

[0032] In some embodiments, a rubber ring 14 is disposed on the inner wall of the docking sleeve 4 .

[0033] In fact, a sealing rubber ring with a width of 5mm and a thickness of 3mm is provided in the middle position of the docking sleeve 4 and is tightly attached to the inner wall of the docking sleeve 4. The built-in FRP sleeves of the stainless steel-FRP steel tube concrete composite columns above and below the connecting component 1 can be tightly connected in the docking sleeve 4, and at the same time form a seal to prevent leakage of concrete poured later.

[0034] In some embodiments, bolt holes 12 are respectively formed around the docking sleeve 4 , and the bolt holes 12 penetrate the longitudinal web 3 and the transverse web 2 fixed on the docking sleeve 4 .

[0035] In fact, the built-in FRP tube connection with the stainless steel-FRP steel tube concrete composite column below the connecting assembly 1 is completed at the sealing rubber ring in the middle of the docking sleeve 4, and at the same time, the bolts located in the upper half of the docking sleeve 4 are tightened along the direction of the bolt hole 12, so that the FEP tube can be fixed on the docking sleeve 4.

[0036] In some embodiments, an outer wall of the annular end plate 5 is provided with an external convex thread 8 .

[0037] In fact, external convex straight threads are provided on the upper and lower annular ends of the connection component 1, so that the external stainless steel sleeve of the stainless steel-FRP steel tube concrete composite column can be directly tightened through the threaded machine, which effectively avoids welding on the construction site, saves construction costs, and achieves a green construction effect.

[0038] In some embodiments, vertical reinforcing ribs 13 are provided between the annular end plates 5 .

[0039] In fact, four vertical stiffening supports are symmetrically arranged between the upper and lower annular end plates 5 of the connecting component 1, and both ends are welded to the inner sides of the upper and lower end plates respectively. The thickness of the vertical stiffening supports is 10 mm and the width is 80 mm. The steel model is Q345GJ, so as to save steel plate materials, ensure that the connecting component 1 has sufficient strength and rigidity, and enhance the overall mechanical properties of the connecting component 1.

[0040] In some embodiments, rubber gaskets are provided on the external convex threads 8 of the upper and lower annular end plates 5 .

[0041] In fact, the outer convex straight thread of the connection component 1 is covered with a rubber insulating gasket film, which can effectively avoid the adverse effects of corrosion caused by contact between different types of metals.

[0042] In some embodiments, the assembled stainless steel-FRP steel tube concrete composite column energy dissipation connection node mainly comprises the following steps when connecting the stainless steel-FRP steel tube concrete composite column:

[0043] S1: Prefabricate the connection components 1 in a prefabrication plant.

[0044] S2: A sealing rubber ring with a width of 5 mm and a thickness of 3 mm is provided in the vertical middle position of the docking sleeve 4 in the middle of the connection assembly 1 and is close to the inner wall of the docking sleeve 4 to seal and connect the built-in FRP pipe of the composite column to prevent leakage during concrete pouring of the composite column.

[0045] S3: The external convex straight threads arranged on the upper and lower end plates of the connection component 1 are covered with a 3mm thick rubber gasket film to prevent the external stainless steel pipe of the composite column from being mechanically connected to the connection component 1 due to direct contact between two different materials, thereby aggravating the corrosion of the connection component 1.

[0046] S4: Place the connection component 1 processed by S2 and S3 on the upper end of the cast stainless steel-FRP concrete composite column below the connection component 1, and tighten the annular external convex straight thread at the lower end of the connection component 1 with the external stainless steel machinery in the composite column below. At the same time, the FRP pipe is extended into the docking sleeve 4 in the middle of the connection component 1, and the four ordinary bolts in the lower half of the docking sleeve 4 are tightened.

[0047] S5: After completing S4, the longitudinal connecting steel bars of the transverse concrete beam and the longitudinal concrete beam are passed through the transverse connecting steel bar holes 10 and the longitudinal connecting steel bar holes 9 on the longitudinal web and the transverse web.

[0048] S6: After completing S5, the connection component 1 is positioned, and the built-in FRP tube of the stainless steel-FRP steel tube concrete composite column above it is extended into the docking sleeve 4, and the built-in FRP tube of the stainless steel-FRP steel tube concrete composite column below the connection component 1 is connected at the sealing rubber ring in the middle of the docking sleeve 4, and the four ordinary bolts located in the upper half of the docking sleeve 4 are tightened at the same time.

[0049] S7: After completing S6, the annular external convex straight thread at the upper end of the connection component 1 is tightened with the external stainless steel machine in the upper composite column, and the stainless steel-FRP steel tube concrete composite columns at the upper and lower ends of the connection component 1 are effectively connected.

[0050] S8: pour the stainless steel-FRP steel tube concrete composite column concrete above the connection component 1, and at the same time fill the cavity part of the connection component 1 with concrete, and vibrate it to make it dense.

[0051] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. An assembled stainless steel-FRP steel tube concrete composite column connection node, characterized in that: It includes a connecting component, and annular end plates fixed at both ends of the connecting component, and also includes an energy-absorbing component fixed on the solidification component. The connecting component includes a transverse web, a longitudinal web, and a docking sleeve. The multiple transverse webs and the longitudinal webs are vertically arranged between the annular end plates, and the transverse webs and the longitudinal webs are provided with multiple steel bar holes. The docking sleeve is arranged at the center of the connecting component, and the transverse webs and the longitudinal webs are fixed on the surrounding side of the docking sleeve. The energy-absorbing component includes a reset plate and a self-resetting vibration isolation spring. The self-resetting vibration isolation spring is arranged between the transverse webs. The reset plate is vertically fixed between the longitudinal webs, and the self-resetting vibration isolation spring is arranged between the reset plates.

2. The assembled stainless steel-FRP steel tube concrete composite column connection node according to claim 1, characterized in that: The inner wall of the butt sleeve is provided with a rubber ring.

3. The assembled stainless steel-FRP steel tube concrete composite column connection node according to claim 2, characterized in that: Bolt holes are respectively arranged around the butt joint sleeve, and the bolt holes penetrate through the longitudinal web plate and the transverse web plate fixed on the butt joint sleeve.

4. The assembled stainless steel-FRP steel tube concrete composite column connection node according to claim 3 is characterized in that: The outer wall of the annular end plate is provided with an external convex thread.

5. The assembled stainless steel-FRP steel tube concrete composite column connection node according to claim 4, characterized in that: Vertical reinforcing ribs are arranged between the annular end plates.

6. The assembled stainless steel-FRP steel tube concrete composite column connection node according to claim 5, characterized in that: Rubber gaskets are arranged on the outer convex threads of the upper and lower annular end plates.

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