An assembled stainless steel-fiber reinforced polymer (frp) concrete composite column energy dissipation connecting joint

Abstract

The application provides an assembled stainless steel-FRP steel pipe concrete composite column connecting joint, and relates to the technical field of assembled steel pipe composite column connecting structures, and is characterized in that the connecting joint comprises a connecting assembly, annular end plates fixed at two ends of the connecting assembly, and a damping assembly fixed on the connecting assembly; the connecting assembly comprises a transverse web, a longitudinal web and a butt joint sleeve; the plurality of transverse webs and longitudinal webs are arranged perpendicularly between the annular end plates; a plurality of steel bar holes are arranged on the transverse web and the longitudinal web; the butt joint sleeve is arranged at the center of the connecting assembly; the butt joint sleeve is fixed with the transverse web and the longitudinal web on the circumferential side; the damping assembly comprises a reset plate and a self-resetting vibration isolation spring; the reset keys are arranged between the transverse webs; the reset plate is fixed perpendicularly between the longitudinal webs; and the self-resetting vibration isolation spring is arranged between the reset plates. The strength of the connecting assembly is enhanced, the construction process is simple, the quality is easy to control, and the application is low in carbon and environmentally friendly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of assembled steel pipe composite column connection structure, and particularly relates to an assembled stainless steel-FRP steel pipe concrete composite column connecting joint. BACKGROUND

[0002] Assembled structure is the development trend in the field of engineering structure. Assembled structure can realize industrialized prefabrication in prefabrication yard, so it has obvious advantages in construction quality, construction period guarantee, green energy saving, carbon emission reduction and the like, and meets the green sustainable and high-quality development direction of China. At present, the development of new assembled structure is promoted to accelerate the popularization of intelligent construction and building industrialization, so as to accelerate the transformation and upgrading of domestic engineering structure. At present, the steel pipe concrete composite column has developed rapidly in China in recent years due to the obvious mechanical performance and durability advantage compared with the ordinary concrete column. However, the steel sleeve pipe in the steel pipe concrete composite column is not resistant to corrosion and high temperature in fire, which limits the application range. The stainless steel-FRP steel pipe concrete composite column has obvious advantages in corrosion resistance and fire resistance in harsh and complex environments compared with the steel pipe concrete composite column, so the stainless steel-FRP steel pipe concrete composite column has broad application prospects. The beam-column connecting joint of the composite column has the characteristics of complex stress, large number of connecting components and the like, and plays a control role in the overall performance of the structure. The quality of the connecting joint will directly affect the safety of the overall structure of the composite column after construction. Therefore, it is a technical problem to be solved in the development of the composite column at present to provide a connecting joint with sufficient strength and rigidity, good seismic performance, wide application range, simple construction and low cost.

[0003] A Chinese invention patent with the authorization number CN209556237U provides a composite column connecting joint, which comprises 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 each comprise a prefabricated column shell and a cast-in-place part. One end of a floor prefabricated layer is arranged 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 a floor cast-in-place layer are connected into an integrated body by pouring concrete. A connecting steel bar assembly is arranged at the abutting position of the upper composite column and the lower composite column to ensure the connecting strength of the connecting joint. The upper composite column and the lower composite column each comprise a prefabricated column shell and a cast-in-place part. The prefabricated column shell can be produced in advance in a factory. A structural steel bar assembly is embedded in the prefabricated column shell to ensure the structural strength of the composite column. The use of the prefabricated column shell can reduce the demand for formwork in the field construction, improve the construction efficiency and improve the occupancy rate of the assembled structure.

[0004] However, the composite column connecting joint provided in the above patent has the problems of insufficient connecting strength and complex construction in earthquake-prone areas, so a scheme is needed to improve this problem. SUMMARY

[0005] The application aims to provide a fabricated stainless steel-FRP steel pipe concrete composite column connecting joint, which can enhance the strength of the connecting assembly, has simple construction process, easy quality control, low carbon and environmental protection.

[0006] The application provides a fabricated stainless steel-FRP steel pipe concrete composite column connecting joint, which comprises a connecting assembly, annular end plates fixed at two ends of the connecting assembly, and an energy consumption assembly fixed on the connecting assembly.

[0007] The two groups of vertical self-resetting vibration isolation springs and the two groups of horizontal self-resetting vibration isolation springs symmetrically arranged on the two sides of the horizontal and vertical webs of the connecting assembly can effectively improve the anti-seismic and wind-resistant performance of the connecting assembly, enhance the energy consumption capacity of the connecting assembly, make the structure meet the three-level anti-seismic standard, ensure that the structure follows the anti-seismic protection target of no damage under small earthquakes, repairable under medium earthquakes and no collapse under large earthquakes in the service life stage, and make the stainless steel-FRP steel pipe concrete composite column have a wider application range.

[0008] Optionally, the inner wall of the butt joint sleeve is provided with a rubber ring.

[0009] The rubber ring is used to seal the built-in FRP pipe of the composite column to prevent concrete leakage during pouring of the composite column.

[0010] Optionally, bolt holes are formed around the butt joint sleeve, and the bolt holes penetrate the vertical webs and the horizontal webs fixed on the butt joint sleeve.

[0011] The sealing rubber ring in the middle of the butt joint sleeve is connected with the built-in FRP pipe of the stainless steel-FRP steel pipe concrete composite column below the connecting assembly, and the bolt in the upper half of the butt joint sleeve is tightened along the direction of the bolt hole, so that the FEP pipe is fixed on the butt joint sleeve.

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

[0013] The external thread on the outer wall of the annular end plate can connect the external stainless steel pipe, so that the connecting assembly is quickly fixed.

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

[0015] The vertical reinforcing ribs between the annular end plates can enhance the compression resistance of the connecting assembly.

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

[0017] The external straight threads arranged on the upper and lower end plates of the connecting assembly are covered with rubber gaskets to prevent the connection assembly from being corroded due to the direct contact between the two different materials when the external stainless steel pipe of the composite column is mechanically connected to the connecting assembly.

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

[0019] The connecting node provided in the present application effectively solves the technical problems of connecting the inner and outer sleeves of the stainless steel-FRP steel pipe concrete composite column. Meanwhile, the connecting node has a wide application range and is suitable for connecting other types of steel pipe concrete composite columns, thereby providing an effective technical solution for the construction of steel pipe concrete composite columns.

[0020] The holes in the horizontal and vertical webs of the connecting node are reserved for the longitudinal connecting steel bars, which ensures the positioning of the connecting node and makes the force transmission of the structural beam column more reliable, thereby effectively enhancing the overall mechanical properties of the completed structure.

[0021] The vertically and horizontally arranged self-resetting vibration isolation springs enhance the energy dissipation capacity of the connecting node, improve the seismic and wind resistance of the completed structure, and have great advantages in absorbing impact, relieving vibration, and stable operation. The completed structure meets the three-level seismic fortification standard, ensures that the structure follows the seismic fortification goal of no damage under small earthquakes, repairable under medium earthquakes, and no collapse under large earthquakes during the service life, and makes the stainless steel-FRP steel pipe concrete composite column have a wider application range.

[0022] The connecting node realizes a full-mechanical connection construction mode of the outer sleeve of the stainless steel-FRP steel pipe concrete composite column, avoids welding in the construction site, has simple construction technology, easy quality control, low carbon environmental protection, and meets the green and sustainable development construction concept.

[0023] The application will be described in further detail below with reference to the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 An overall structure schematic diagram of the assembled stainless steel-FRP steel pipe concrete composite column connecting node is provided.

[0025] Figure 2 A partial structure schematic diagram of the assembled stainless steel-FRP steel pipe concrete composite column connecting node is provided.

[0026] Figure 3 A schematic diagram of the transverse web plate of the assembled stainless steel-FRP steel pipe concrete composite column connecting node is provided.

[0027] Figure 4 A schematic diagram of the longitudinal web plate of the assembled stainless steel-FRP steel pipe concrete composite column connecting node is provided.

[0028] The reference signs are as follows: 1, connecting assembly; 2, transverse web plate; 3, longitudinal web plate; 4, butt joint 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 reinforcing rib; 14, rubber ring. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application. Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the common meanings by those of ordinary skill in the art. The similar words such as “comprise” used herein mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, and do not exclude other elements or objects.

[0030] The embodiment of the application provides an assembled stainless steel-FRP steel pipe concrete composite column connecting joint, which comprises a connecting assembly 1, annular end plates 5 fixed at two ends of the connecting assembly 1, and a damping assembly fixed on the connecting assembly 1, the connecting assembly 1 comprises a transverse web plate 2, a longitudinal web plate 3 and a butt joint sleeve 4, a plurality of the transverse web plates 2 and the longitudinal web plates 3 are arranged perpendicularly between the annular end plates 5, a plurality of steel bar holes are arranged on the transverse web plate 2 and the longitudinal web plate 3, the butt joint sleeve 4 is arranged at the center of the connecting assembly 1, and the transverse web plate 2 and the longitudinal web plate 3 are fixed on the side of the butt joint sleeve 4, the damping assembly comprises a reset plate 11, a transverse self-resetting vibration isolation spring 7 and a longitudinal self-resetting vibration isolation spring 6, the transverse self-resetting vibration isolation spring 7 is arranged between the transverse web plates 2, the reset plate 11 is fixed perpendicularly between the longitudinal web plates 3, and the longitudinal self-resetting vibration isolation spring 6 is arranged between the reset plates 11.

[0031] Referring to 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 the two sides of the transverse and longitudinal web plates 3 of the connecting assembly 1, the anti-seismic and wind-resistant performance of the connecting assembly 1 can be effectively improved, the energy dissipation capacity of the connecting assembly 1 is enhanced, the structure meets the three-level anti-seismic standard, the anti-seismic target of no damage under small earthquakes, repairable under medium earthquakes and no collapse under large earthquakes in the service life stage of the structure is ensured, the application range of the stainless steel-FRP steel pipe concrete composite column is wider, eight steel bar holes 9 and 10 for passing through longitudinal and transverse connecting steel bars on the composite column are symmetrically arranged on the transverse web plate 2 and the longitudinal web plate 3 in the connecting assembly 1, the size specifications of the reserved steel bar holes are φ18, φ20 and φ22, the distance between the holes and the distance from the holes to the web plate are greater than 1.5 times the diameter of the holes, the two groups of vertical self-resetting vibration isolation springs in the connecting assembly 1 can effectively absorb the energy generated by the longitudinal seismic wave, the two groups of transverse self-resetting vibration isolation springs 7 in the connecting assembly 1 can effectively absorb the energy generated by the transverse seismic wave, thereby avoiding the overall damage of the structure due to the joint failure under the action of the earthquake, effectively improving the overall anti-seismic performance of the structure, making the structure meet the three-level anti-seismic standard, ensuring the anti-seismic target of no damage under small earthquakes, repairable under medium earthquakes and no collapse under large earthquakes in the service life stage of the structure, and making the application range of the stainless steel-FRP steel pipe concrete composite column wider.

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

[0033] In fact, the sealing rubber ring with a width of 5 mm and a thickness of 3 mm is arranged at the middle position of the butt joint sleeve 4 and tightly contacts the inner wall of the butt joint sleeve 4, so that the built-in FRP sleeve of the stainless steel-FRP steel pipe concrete composite column above and below the connecting assembly 1 is tightly connected in the butt joint sleeve 4, a seal is formed, and concrete leakage in the later pouring process is prevented.

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

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

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

[0037] In fact, the external straight thread is arranged on the upper and lower annular ends of the connecting assembly 1, which facilitates the direct mechanical screwing of the external stainless steel sleeve of the stainless steel-FRP steel pipe concrete composite column through the thread, effectively avoids welding on the construction site, saves construction cost, and at the same time realizes the effect of green construction.

[0038] In some embodiments, vertical reinforcement ribs 13 are arranged 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 assembly 1, and the two ends of the vertical stiffening supports are respectively welded to the inner sides of the upper and lower end plates. The thickness of the vertical stiffening support is 10 mm, the width is 80 mm, and the steel type of the vertical stiffening support is Q345GJ. In this way, the steel plate material is saved, the strength and stiffness of the connecting assembly 1 are ensured, and the overall mechanical properties of the connecting assembly 1 are enhanced.

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

[0041] In fact, the rubber insulation gasket film is used to cover the external straight thread of the connecting assembly 1, which can effectively avoid the adverse effects of different types of metal contact and accelerated corrosion.

[0042] In some embodiments, the assembled stainless steel-FRP steel pipe concrete composite column energy dissipation connecting joint mainly includes the following steps when connecting the stainless steel-FRP steel pipe concrete composite column:

[0043] S1: Preparing the connecting assembly 1 in the prefabrication factory.

[0044] S2: A sealing rubber ring with a width of 5 mm and a thickness of 3 mm is arranged at the vertical middle position of the docking sleeve 4 in the connecting assembly 1, which is tightly attached to the inner wall of the docking sleeve 4, so as to seal the built-in FRP pipe of the composite column and prevent leakage during pouring of the composite column concrete.

[0045] S3: The outer convex straight thread on the upper and lower end plates of the connecting assembly 1 is covered with a 3mm thick rubber gasket film to prevent the connecting assembly 1 from being corroded due to the direct contact between the two different materials when the external stainless steel pipe of the composite column is mechanically connected to the connecting assembly 1.

[0046] S4: The connecting assembly 1 treated in S2 and S3 is placed on the upper end of the stainless steel-FRP concrete composite column that has been poured below the connecting assembly 1, and the annular outer convex straight thread at the lower end of the connecting assembly 1 is mechanically tightened with the external stainless steel pipe below, while the FRP pipe is inserted into the butt joint sleeve 4 in the middle of the connecting assembly 1, and the four ordinary bolts in the lower half of the butt joint sleeve 4 are tightened.

[0047] S5: After S4 is completed, the longitudinal connecting steel bars of the transverse concrete beams and the longitudinal concrete beams are inserted 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 S5 is completed, the positioning of the connecting assembly 1 is completed, the internal FRP pipe of the stainless steel-FRP steel pipe concrete composite column above the connecting assembly 1 is inserted into the butt joint sleeve 4, and the connection with the internal FRP pipe of the stainless steel-FRP steel pipe concrete composite column below the connecting assembly 1 is completed at the sealing rubber ring in the middle of the butt joint sleeve 4, while the four ordinary bolts in the upper half of the butt joint sleeve 4 are tightened.

[0049] S7: After S6 is completed, the annular outer convex straight thread at the upper end of the connecting assembly 1 is mechanically tightened with the external stainless steel pipe above, and the effective connection of the stainless steel-FRP steel pipe concrete composite columns above and below the connecting assembly 1 is completed.

[0050] S8: The stainless steel-FRP steel pipe concrete composite column above the connecting assembly 1 is poured with concrete, and the hollow cavity of the connecting assembly 1 is filled with concrete and vibrated and compacted.

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

Claims

1. A fabricated stainless steel-FRP steel pipe concrete composite column connection joint, characterized in that, The utility model provides a connecting assembly, and annular end plates fixed at both ends of the connecting assembly, and a energy dissipation assembly fixed on the connecting assembly, the connecting assembly comprises cross webs, longitudinal webs and butt joint sleeves, a plurality of cross webs and longitudinal webs are arranged perpendicularly between the annular end plates, a plurality of steel bar holes are arranged on the cross webs and longitudinal webs, the butt joint sleeves are arranged at the center of the connecting assembly, the cross webs and longitudinal webs are fixed on the circumferential side of the butt joint sleeves, the energy dissipation assembly comprises reset plates and self-resetting vibration isolation springs, the self-resetting vibration isolation springs are arranged between the cross webs, the reset plates are fixed perpendicularly between the longitudinal webs, and the self-resetting vibration isolation springs are arranged between the reset plates.

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

3. The fabricated stainless steel-FRP steel pipe concrete composite column connection joint according to claim 2, characterized in that, Screw holes are formed around the butt joint sleeve, and the screw holes penetrate the longitudinal webs and cross webs fixed on the butt joint sleeve.

4. The fabricated stainless steel-FRP steel pipe concrete composite column connecting joint according to claim 3, characterized in that, The outer wall of the annular end plate is provided with an external thread.

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

6. The fabricated stainless steel-FRP steel pipe concrete composite column connecting joint according to claim 5, characterized in that, Rubber gaskets are arranged on the external threads of the annular end plates.

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