Steel pipe confined reinforced concrete column and steel beam connecting joint and construction method

Abstract

The application discloses a kind of steel pipe confined reinforced concrete column and steel beam connecting joint, including steel pipe confined reinforced concrete column, several steel beams, first connecting piece and energy dissipation component;The steel beam is arranged along the outer wall of steel pipe confined reinforced concrete column with interval;The steel pipe confined reinforced concrete column includes upper steel pipe section, lower steel pipe section, the middle node section between upper and lower steel pipe section, and the reinforced concrete column in lower steel pipe section, middle node section and upper steel pipe section;The outer wall of the middle node section is fixed with the first connecting piece corresponding to the number of steel beam, and the end of steel beam is connected with the first connecting piece through energy dissipation component.The beneficial effects of the present application are that the first connecting piece is connected with the middle node section steel pipe and rib plate respectively, achieving the overall connection of the joint area;The confining effect of steel pipe on core concrete is enhanced, the compressive capacity, shear capacity and stiffness of the joint are increased, and the connection strength of the whole joint area is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building structure component connection, in particular to a steel pipe confined reinforced concrete column and steel beam connecting joint and construction method. BACKGROUND

[0002] Earthquake is a natural disaster frequently occurring on the earth, often causing major disasters, and China is a country with frequent earthquakes, and the earthquake regions are widely distributed. Under the action of earthquake, houses and other facilities will be severely damaged, and the post-earthquake building reconstruction needs to spend a lot of financial resources, material resources and human resources.

[0003] The steel pipe confined concrete structure is a kind of steel-concrete composite structure, which makes full use of the complementarity of steel structure and concrete structure, effectively plays the tensile strength and plasticity of steel and the compressive strength of concrete. Since the steel pipe in the joint area is disconnected from the steel pipes at the upper and lower ends to form a construction joint, the steel pipe in the joint area does not directly bear the longitudinal load, and only plays a confining role on the core concrete. The steel pipe confined reinforced concrete column has the advantages of high bearing capacity, strong elastic-plastic deformation capacity, good energy dissipation performance, outstanding seismic performance, and saving of formwork, and will be widely used in high-rise buildings, large-span structures, high-rise structures, large-scale heavy-load complex industrial plants and other structures, and good economic and social benefits will be achieved.

[0004] In recent years, with the development of the construction industry, the disadvantages of cast-in-place structure in labor cost, environmental pollution, construction period and quality control are increasingly prominent, which has gradually been difficult to meet the actual needs of the current development of the construction industry. The state vigorously advocates prefabricated buildings and the development of green and environmentally friendly buildings, but there are few studies on the existing prefabricated steel pipe confined reinforced concrete column-beam joints, and some prefabricated buildings perform poorly in earthquakes. The mechanical properties of beam-column connections have a great influence on the seismic performance of prefabricated structures. The beam-column joint is an important force transfer part between components, and the lack of strength and ductility of the beam-column joint is the weakest link in the structure, which is the main reason for the failure of such structures. In practical engineering, there are a large number of steel pipe confined reinforced concrete columns using square cross-section structure form, when the vertical load is large, the steel pipe will be disconnected from the concrete at the middle of the steel pipe end due to the large lateral deformation of the steel pipe, and the restraining effect of the steel pipe on the concrete is lost. According to the relevant standards, due to the too strong restraining effect of the steel pipe, it is difficult to achieve the requirement that the compressive bearing capacity of the joint area is higher than that of the column by simply increasing the stirrups, and the dense stirrups will lead to difficulty in concrete pouring and quality guarantee, so it is necessary to take reasonable measures to increase the restraining effect of the steel pipe in the joint area on the core concrete. For the steel pipe confined reinforced concrete column-steel beam joint, the existing technology usually adopts welding or bolt connection between the outer steel pipe of the concrete column and the steel beam, so that the outer steel pipe of the concrete column in the joint area directly bears the bearing capacity transmitted by the steel beam, the force transmission efficiency is low, the restraining effect of the outer steel pipe of the concrete column in the joint area on the core concrete is reduced, the shear strength of the joint area is low, the restraining effect of the steel pipe in the joint area on the core concrete is insufficient, and the connection strength of the joint area is difficult to guarantee. SUMMARY

[0005] The present application aims at the deficiencies of the prior art, and provides a steel pipe confined reinforced concrete column and steel beam connecting joint and construction method, which aims to improve the connection strength of the joint area and enhance the restraining effect of the steel pipe in the joint area on the core concrete.

[0006] The technical scheme adopted by the present application is as follows: a steel pipe confined reinforced concrete column and steel beam connecting joint, comprising a steel pipe confined reinforced concrete column, a plurality of steel beams, a first connecting piece and an energy dissipation component;

[0007] The steel beams are arranged along the outer wall of the steel pipe confined reinforced concrete column;

[0008] The steel pipe confined reinforced concrete column comprises an upper steel pipe section, a lower steel pipe section, a middle joint section between the upper and lower steel pipe sections, and a steel reinforced concrete column in the lower steel pipe section, the middle joint section and the upper steel pipe section;

[0009] The upper steel pipe section and the lower steel pipe section are respectively provided with a reserved construction joint between the middle joint section;

[0010] The reinforced concrete column comprises column longitudinal reinforcement, column hoop reinforcement and a concrete column, and the column longitudinal reinforcement and the column hoop reinforcement form a steel reinforcement cage;

[0011] The outer wall of the middle node section is fixed with first connecting pieces corresponding to the number of steel beams, and the end of the steel beam is connected with the first connecting piece through an energy dissipation assembly.

[0012] According to the above scheme, the first connecting piece comprises a top plate, a bottom plate and two support plates arranged between the top plate and the bottom plate; the inner ends of the top plate, the bottom plate and the support plates are inserted into the middle node section and are connected with the middle node section through bolts respectively.

[0013] According to the above scheme, a notch is formed in the middle of the inner end of the bottom plate of the first connecting piece, forming a single-sided bottom plug plate with two outer ends connected and an inner end separated; a notch is formed in the middle of the inner end of the top plate of the first connecting piece, forming a single-sided top plug plate with two outer ends connected and an inner end separated.

[0014] According to the above scheme, the energy dissipation assembly comprises a U-shaped connecting plate and a plug-in piece; the upper flange plate of the steel beam is flush with the top plate of the first connecting piece and is connected through the U-shaped connecting plate and connecting bolts; the lower flange plate of the steel beam is flush with the bottom plate of the first connecting piece and is connected through the U-shaped connecting plate and connecting bolts; the plug-in piece comprises a first plug-in plate and a second plug-in plate provided with a clamping groove, the first plug-in plate and the second plug-in plate are connected, and each is provided with a bolt hole; the first plug-in plate is inserted into the two support plates of the first connecting piece and is connected through connecting bolts A; the end of the web plate of the steel beam is inserted into the clamping groove of the second plug-in plate and is connected through bolts; a triangular stiffener is arranged at the connection of the first plug-in plate and the second plug-in plate.

[0015] According to the above scheme, the U-shaped connecting plate comprises horizontal plate segments on both sides and a U-shaped plate segment in the middle, and a plurality of bolt holes are formed in the horizontal plate segments; the U-shaped connecting plate at the top is overlapped on the upper flange plate of the steel beam and the top plate of the first connecting piece, the U-shaped plate segment is arched upward, one side of the horizontal plate segment is connected with the upper flange plate of the steel beam through a bolt, and the other side of the horizontal plate segment is connected with the top plate of the first connecting piece through a connecting bolt; the U-shaped connecting plate at the bottom is arranged at the bottom of the lower flange plate of the steel beam and the bottom plate of the first connecting piece, the U-shaped plate segment is arched downward, one side of the horizontal plate segment is connected with the lower flange plate of the steel beam through a bolt, and the other side of the horizontal plate segment is connected with the bottom plate of the first connecting piece through a bolt.

[0016] According to the scheme, the energy consumption component further comprises a brass friction plate and a rigid backing plate arranged outside the support plate in sequence from inside to outside, and the brass friction plate and the rigid backing plate are respectively provided with bolt holes corresponding to the positions of the connecting bolts A; the connecting bolts A pass through the bolt holes on the brass friction plate, the rigid backing plate and the first plug-in plate, and the bolt holes on the support plate of the first connecting piece, so as to connect the steel beam, the plug-in piece, the first connecting piece and the middle node segment into an integral whole.

[0017] According to the scheme, the support plate of the first connecting piece is provided with a strip-shaped hole, and the length direction of the strip-shaped hole is consistent with the length direction of the steel beam; and the connecting bolt A is matched with the strip-shaped hole.

[0018] According to the scheme, the middle node segment comprises two rectangular steel pipes, and the inner side plates of the long edges of the two rectangular steel pipes are arranged oppositely, and the top and bottom parts of the two rectangular steel pipes are connected and welded by a reinforcing ring plate respectively, so as to form an integral structure with a cross section consistent with the upper and lower steel pipe segments; the inner side plates of the long edges of the rectangular steel pipes are provided with rib plate grooves, and a rib plate passes through the rib plate grooves of the two rectangular steel pipes; the outer side plates of the long edges of the rectangular steel pipes are provided with an upper slot, a double-sided middle slot and a lower slot, and the upper slot, the double-sided middle slot and the lower slot are matched with the top plate, the two support plates and the bottom plate of the first connecting piece in sequence respectively; the top plate, the support plates and the bottom plate of the first connecting piece are inserted into the corresponding slots respectively, and the rib plate is located between the two support plates of the first connecting piece, and the top and bottom parts of the rib plate are located in the notches of the top plate and the bottom plate of the first connecting piece respectively; the first connecting piece passing through the outer side plates of the long edges of the rectangular steel pipes is connected with the rib plate by a plurality of bolts.

[0019] According to the scheme, the side plates of the short edges of the two rectangular steel pipes are arranged side by side, and the two side plates are connected with the same first connecting piece; the two side plates of the short edges of the rectangular steel pipes are respectively provided with a single-sided upper slot, a single-sided middle slot and a single-sided lower slot, and the single-sided upper slot, the single-sided middle slot and the single-sided lower slot are matched with the single-sided top plug-in plate, one of the support plates and the single-sided bottom plug-in plate of the first connecting piece respectively; the first connecting piece located outside the side plates of the short edges of the two rectangular steel pipes, the single-sided top plug-in plate, the support plate and the single-sided bottom plug-in plate on one side of the first connecting piece are inserted into the single-sided upper slot, the single-sided middle slot and the single-sided lower slot on one of the side plates of the short edges of the rectangular steel pipes respectively, and the single-sided top plug-in plate, the support plate and the single-sided bottom plug-in plate on the other side of the first connecting piece are inserted into the single-sided upper slot, the single-sided middle slot and the single-sided lower slot on the other side plate of the short edge of the rectangular steel pipe respectively, the inner side plates of the long edges of the two rectangular steel pipes are clamped between the two support plates, and the top and bottom parts pass through the notches of the top plate and the bottom plate of the first connecting piece respectively, and the inner side plates of the long edges of the two rectangular steel pipes and the two support plates of the first connecting piece are connected by bolts.

[0020] The application further provides a construction method of the connecting node, and the method comprises the following steps:

[0021] S1: design and prefabrication of components of the node: according to the designed size of the steel beam and the reinforced concrete column, the size of each component is determined, and the component is prefabricated in the factory;

[0022] S2: connecting the middle node section and the first connecting piece in the factory to obtain an assembly;

[0023] S3: binding the column longitudinal reinforcement and the column hoop reinforcement in the lower steel pipe section; hoisting the lower steel pipe section vertically around the outer periphery of the column reinforcement cage, and the column longitudinal reinforcement is higher than the middle node section; hoisting the assembly obtained in step S2 above the lower steel pipe section, and aligning the column longitudinal reinforcement with the corresponding column longitudinal reinforcement; binding the column longitudinal reinforcement and the column hoop reinforcement in the upper steel pipe section; hoisting the upper steel pipe section vertically around the outer periphery of the column reinforcement cage; reserving a construction joint between the lower steel pipe section, the upper steel pipe section and the middle node section, and connecting and fixing the lower steel pipe section, the upper steel pipe section and the middle node section by setting temporary supports; no column hoop reinforcement is arranged in the middle node section;

[0024] S4: hoisting the steel beam and connecting and installing the energy dissipation assembly; first, bolt installing the plug-in piece, brass friction plate and rigid backing plate, and then bolt installing the upper and lower U-shaped connecting plates;

[0025] S5: the steel pipe serves as a formwork, rubber rods are filled in the construction joints and are pasted with adhesive tape on both sides of the rubber rods to serve as a formwork, and the construction joints are closed; then, the column body concrete is poured in the upper steel pipe section, the lower steel pipe section and the middle node section, and the reinforced concrete column is formed by using the layered pouring and layered vibrating method; after the concrete column reaches the strength requirement, the formwork at the construction joint and the temporary support are removed.

[0026] The beneficial effects of the present application are:

[0027] 1、In the present application, the first connecting piece is bolted with the rectangular steel pipe of the middle node section and the rib plate, is welded with the joint of the outer wall of the two rectangular steel pipes of the node section, and is connected with the reinforcing ring plate and the rectangular steel pipe of the middle node section, so as to realize the overall connection of the node area; the connection between the supporting plate, the rib plate of the first connecting piece and the rectangular steel pipe of the node area forms a field-shaped structure in the middle node section, which expands the effective constraint area of the core concrete; the reinforcing ring plate is equivalent to thickening the thickness of the steel pipe, which prevents the lateral deformation of the steel pipe of the middle node section, so as to cause the steel pipe and the concrete to be separated; the constraint effect of the steel pipe of the node area on the core concrete is enhanced, the compression bearing capacity, the shear capacity and the stiffness of the node are increased, and the connection strength of the whole node area is improved.

[0028] 2、The application makes the steel beam bending moment and shear effectively transfer to the node area through the connection structure of the beam-column joint, strengthens the shear strength of the joint, so that the outer steel pipe of the node area concrete column does not directly bear the bearing capacity transferred by the steel beam, but the first connecting piece, the internal concrete of the node area, the internal steel pipe and the rib plate bear the bearing capacity transferred by the steel beam.

[0029] 3、In the application, the energy dissipation assembly includes a U-shaped connecting plate and a plug-in piece, which dissipate energy in the horizontal direction and the rotating direction through the U-shaped connecting plate and the brass friction plate, and make the plastic hinge of the beam-column joint move outward, greatly improving the seismic capacity of the whole structure; the first plug-in plate of the plug-in piece improves the bearing capacity of the connection, the bolt insertion hole enhances the connection capacity compared with the single-web H-shaped steel perforation, greatly utilizes the tensile, anti-pulling and shear capacity of the bolt; the U-shaped connecting plate can also be replaced after the earthquake.

[0030] 4、In the construction method of the application, the installation of the steel pipe, the steel beam is directly assembled with the first connecting piece, the reinforcing ring plate, the rib plate and the middle node section of the rectangular steel pipe assembled in the factory through the energy dissipation assembly, and the brass friction plate and the rigid backing plate only need to be installed on the first connecting piece, reducing the installation difficulty of the connection; and the node area does not need to be bound with column stirrups, greatly simplifying the construction process, reducing the construction difficulty and improving the construction progress. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is the overall schematic diagram of example one in the application.

[0032] Figure 2 It is the structure top view of example one.

[0033] Figure 3 It is the structure side view of example one.

[0034] Figure 4 It is the schematic diagram of the upper steel pipe section, the lower steel pipe section, the middle node section and the first connecting piece of example one.

[0035] Figure 5 It is the schematic diagram of the middle node section and the first connecting piece of example one.

[0036] Figure 6 It is the connection schematic diagram of the two rectangular steel pipes of the middle node section of example one.

[0037] Figure 7 It is the connection schematic diagram of the energy dissipation assembly, the steel beam and the first connecting piece of example one.

[0038] Figure 8 It is the front view of the first connecting piece of example one.

[0039] Figure 9Side view of the first connector in Example 1.

[0040] Figure 10 Top view of the first connector in Example 1.

[0041] Figure 11 Front view of the plug-in connector in Example 1.

[0042] Figure 12 Left view of the plug-in connector in Example 1.

[0043] Figure 13 Top view of the plug-in connector in Example 1.

[0044] Figure 14 Overall schematic diagram of Example 2 in the present application.

[0045] Figure 15 Schematic diagram of the connection between the energy dissipation assembly, steel beam and first connector in Example 2.

[0046] Figure 16 Front view of the first connector in Example 2.

[0047] Figure 17 Front view of the plug-in connector in Example 2.

[0048] Wherein: 1, upper steel pipe section; 2, lower steel pipe section; 3, middle node section; 3.1, rectangular steel pipe; 3.11, long side outer plate; 3.111, upper notch; 3.112, double-sided middle notch; 3.113, lower notch; 3.12, long side inner plate; 3.121, rib plate slot; 3.13, short side plate; 3.131, single-sided upper notch; 3.132, single-sided middle notch; 3.133, single-sided lower notch; 3.2, reinforcing ring plate; 3.3, rib plate; 4, connecting bolt A; 5, steel beam; 5.1, upper flange plate; 5.2, lower flange plate; 5.3, web plate 5.3; 6, first connector; 6.1, top plate; 6.2, bottom plate; 6.3, support plate; 6.3.1, strip-shaped hole; 6.3.2, adjusting hole; 6.3.3, column longitudinal reinforcement through hole; 7, U-shaped connecting plate; 7.1, horizontal plate section; 7.2, U-shaped plate section; 8, plug-in connector; 8.1, first plug-in plate; 8.2, second plug-in plate; 8.21, clamping groove; 8.3, triangular stiffening plate; 9, brass friction plate; 10, rigid pad plate; 11, reinforced concrete column; 11.1, column longitudinal reinforcement; 11.2, column stirrup; 11.3, concrete column. DETAILED DESCRIPTION

[0049] In order to better understand the present application, the present application will be further described below in conjunction with the drawings and specific examples.

[0050] Example 1

[0051] like Figures 1-3 The diagram shows a steel tube confined reinforced concrete column and steel beam connection node, which includes a steel tube confined reinforced concrete column, several steel beams 5, a first connector 6 and an energy dissipation component;

[0052] The steel beams 5 are arranged at intervals along the outer wall of the steel pipe-constrained reinforced concrete column.

[0053] The steel pipe confined reinforced concrete column includes an upper steel pipe section 1, a lower steel pipe section 2, a middle node section 3 located between the upper and lower steel pipe sections, and reinforced concrete columns within the lower steel pipe section 2, the middle node section 3, and the upper steel pipe section 1.

[0054] Structural joints are reserved between the upper steel pipe section 1 and the lower steel pipe section 2 and the middle node section 3, respectively.

[0055] The reinforced concrete column 11 includes longitudinal reinforcement 11.1, stirrups 11.2, and concrete column 11.3, wherein the longitudinal reinforcement 11.1 and stirrups 11.2 constitute a steel reinforcement skeleton;

[0056] The outer wall of the middle node segment 3 is fixed with a first connector 6 corresponding to the number of steel beams 5. The ends of the steel beams 5 are connected to the first connector 6 through energy-dissipating components, such as... Figure 3 As shown.

[0057] In this invention, a structural joint with a width of 10mm to 20mm is reserved between the upper steel pipe section 1 and the lower steel pipe section 2 and the middle node section 3, respectively.

[0058] In this invention, the cross-section of the steel pipe-confined reinforced concrete column is rectangular. Correspondingly, the cross-sections of the upper steel pipe segment 1, the lower steel pipe segment 2, and the middle node segment 3 are all rectangular. The concrete column 11.3 can be cast from ordinary concrete, high-performance concrete, or recycled concrete. The steel beam 5 is an H-beam or an I-beam, including an upper flange plate 5.1, a web plate 5.2, and a lower flange plate 5.3. There are four steel beams 5, distributed on the four outer sides of the middle node segment 3.

[0059] Preferably, such as Figures 8-10 As shown, the first connecting member 6 is a connecting beam with an "A" shaped cross-section; the first connecting member 6 includes a top plate 6.1, a bottom plate 6.2, and two support plates 6.3 disposed between the top plate 6.1 and the bottom plate 6.2; the inner ends of the top plate 6.1, the bottom plate 6.2, and the support plates 6.3 are all inserted into the middle node segment 3 and are respectively connected to the middle node segment 3 by bolts. The support plates 6.3, the top plate 6.1, and the bottom plate 6.2 are welded to the outer wall of the middle node segment 3 at the joint.

[0060] In the application, a notch is formed in the middle of the inner end of the bottom plate 6.2 of the first connecting piece 6, forming two single-sided bottom plug-in plates; a notch is formed in the middle of the inner end of the top plate 6.1 of the first connecting piece 6, forming two single-sided top plug-in plates.

[0061] Preferably, as shown in Fig. Figure 7 、 11 As shown in Fig. 13, the energy dissipation assembly comprises a U-shaped connecting plate 7 and a plug-in piece 8; the upper flange plate 5.1 of the steel beam 5 is flush with the top plate 6.1 of the first connecting piece 6 and is connected through the U-shaped connecting plate 7 and connecting bolts; the lower flange plate 5.2 of the steel beam 5 is flush with the bottom plate 6.2 of the first connecting piece 6 and is connected through the U-shaped connecting plate 7 and connecting bolts; one side of the plug-in piece 8 is provided with a clamping groove; the end of the web plate 5.3 of the steel beam 5 is inserted into the clamping groove 8.21 of one side of the plug-in piece 8 and is connected through connecting bolts; the other side of the plug-in piece 8 is inserted into the two support plates 6.3 of the first connecting piece 6 and is connected through connecting bolts A4.

[0062] In the application, the U-shaped connecting plate 7 comprises two horizontal plate segments 7.1 on both sides and a U-shaped plate segment 7.2 in the middle, and a plurality of bolt holes are formed in the horizontal plate segments 7.1; the U-shaped connecting plate 7 at the top is overlapped on the upper flange plate 5.1 of the steel beam 5 and the top plate 6.1 of the first connecting piece 6, the U-shaped plate segment 7.2 is arched upward, one side of the horizontal plate segment 7.1 is connected to the upper flange plate 5.1 of the steel beam 5 through a bolt, and the other side of the horizontal plate segment 7.1 is connected to the top plate 6.1 of the first connecting piece 6 through a connecting bolt; the U-shaped connecting plate 7 at the bottom is arranged at the bottom of the lower flange plate 5.2 of the steel beam 5 and the bottom plate 6.2 of the first connecting piece 6, the U-shaped plate segment 7.2 is arched downward, one side of the horizontal plate segment 7.1 is connected to the lower flange plate 5.2 of the steel beam 5 through a bolt, and the other side of the horizontal plate segment 7.1 is connected to the bottom plate 6.2 of the first connecting piece 6 through a bolt.

[0063] In the application, the plug-in piece 8 comprises a first plug-in plate 8.1 and a second plug-in plate 8.2 provided with a clamping groove 8.21, the first plug-in plate 8.1 and the second plug-in plate 8.2 are connected, and both are provided with bolt holes; the first plug-in plate 8.1 is inserted into the two support plates 6.3 of the first connecting piece 6 and is connected through connecting bolts A4; the end of the web plate 5.3 of the steel beam 5 is inserted into the clamping groove 8.21 of the second plug-in plate 8.2 and is connected through a bolt. A triangular stiffener 8.3 is arranged at the connection between the first plug-in plate 8.1 and the second plug-in plate 8.2.

[0064] In the application, a coating material that increases friction can be added on both sides of the first plug-in plate 8.1, and the connection with the first connecting piece 6 can generate friction in the horizontal and rotational directions to dissipate energy.

[0065] Preferably, the energy-consuming component further includes a brass friction plate 9 and a rigid pad 10 arranged sequentially from the inside to the outside of the support plate 6.3. The brass friction plate 9 and the rigid pad 10 are respectively provided with bolt holes corresponding to the positions of the connecting bolts A4. The connecting bolts A4 pass through the bolt holes on the brass friction plate 9, the rigid pad 10 and the first plug plate 8.1, as well as the bolt holes on the support plate 6.3 of the first connector 6 (which are adapted to the connecting bolts A), connecting the steel beam 5, the plug 8, the first connector 6 and the middle node segment 3 into a whole.

[0066] Preferably, the support plate 6.3 of the first connector 6 has a strip hole 6.3.1, the length direction of the strip hole 6.3.1 is consistent with the length direction of the steel beam 5; the connecting bolt A4 is adapted to the strip hole 6.3.1.

[0067] In this invention, the design of the strip hole 6.3.1 allows the connecting bolt A4 to move horizontally and rotate within the strip hole 6.3.1.

[0068] In this embodiment, the connecting bolt A4 is a high-strength bolt; there are multiple connecting bolts A4, and the brass friction plate 9, rigid pad 10, first plug plate 8.1 and support plate 6.3 of the first connector 6 are connected by multiple connecting bolts A4.

[0069] Preferably, such as Figures 4-6 As shown, the middle node segment 3 includes two rectangular steel pipes 3.1. The inner side plates 3.12 of the long sides of the two rectangular steel pipes 3.1 are arranged back to back. The top and bottom of the two rectangular steel pipes 3.1 are connected and welded by reinforcing ring plates 3.2 to form an integral structure with the same cross-section as the upper and lower steel pipe segments. Rib grooves 3.121 are opened on the inner side plates 3.12 of the long sides of the rectangular steel pipes 3.1. A rib plate 3.3 passes through the rib grooves 3.121 of the two rectangular steel pipes 3.1. The outer side plates 3.11 of the long sides of the rectangular steel pipes 3.1 have an upper groove 3.111, double middle grooves 3.112 and a lower groove. 3.113, the upper slot 3.111, the double-sided middle slots 3.112, and the lower slot 3.113 are respectively adapted to the top plate 6.1, the two support plates 6.3, and the bottom plate 6.2 of the first connector 6; the top plate 6.1, the support plates 6.3, and the bottom plate 6.2 of the first connector 6 are respectively inserted into the corresponding slots, and the rib plate 3.3 is located between the two support plates 6.3 of the first connector 6, with the top and bottom of the rib plate 3.3 located in the notches of the top plate 6.1 and the bottom plate 6.2 of the first connector 6, respectively; the first connector 6, which passes through the outer side plate of the long side of the rectangular steel pipe 3.1, is connected to the rib plate 3.3 by several bolts.

[0070] In the present application, the thickness of the rectangular steel tube 3.1 is half of the thickness of the rib plate 3.3. The top plate 6.1 and the bottom plate 6.2 of the first connecting piece 6 are respectively provided with column longitudinal reinforcement penetrating holes 6.3.3 for the column longitudinal reinforcement 11.1 to pass through. The size of the column longitudinal reinforcement penetrating holes 6.3.3 can be determined according to the actual construction, so as to facilitate the installation of the column longitudinal reinforcement 11.1. The rectangular steel tube 3.1 is welded at the gap of the support plate 6.3 of the first connecting piece 6.

[0071] Preferably, the short side plates 3.13 of the two rectangular steel tubes 3.1 are arranged side by side, and both are connected with the same first connecting piece 6. Specifically, the two short side plates 3.13 of the rectangular steel tube 3.1 are respectively provided with a single-sided upper notch 3.131, a single-sided middle notch 3.132 and a single-sided lower notch 3.133, and the single-sided upper notch 3.131, the single-sided middle notch 3.132 and the single-sided lower notch 3.133 are respectively matched with the single-sided top plug plate, one of the support plates 6.3 and the single-sided bottom plug plate of the first connecting piece 6. The single-sided top plug plate, the support plate 6.3 and the single-sided bottom plug plate of one side of the first connecting piece 6 located outside the short side plates of the two rectangular steel tubes 3.1 are respectively inserted into the single-sided upper notch 3.131, the single-sided middle notch 3.132 and the single-sided lower notch 3.133 on one short side plate 3.13 of one rectangular steel tube 3.1, and the single-sided top plug plate, the support plate 6.3 and the single-sided bottom plug plate of the other side of the first connecting piece 6 are respectively inserted into the single-sided upper notch 3.131, the single-sided middle notch 3.132 and the single-sided lower notch 3.133 on the other short side plate 3.13 of the other rectangular steel tube 3.1. The long inner side plates 3.12 of the two rectangular steel tubes 3.1 are clamped between the two support plates 6.3, and the top and bottom pass through the gaps of the top plate 6.1 and the bottom plate 6.2 of the first connecting piece 6 respectively, and the long inner side plates 3.12 of the two rectangular steel tubes 3.1 and the two support plates 6.3 of the first connecting piece 6 are connected by bolts.

[0072] In the present embodiment, the energy dissipation assembly includes a U-shaped connecting plate 7, a plug-in piece 8, a rigid backing plate 10, a brass friction plate 9 and a connecting bolt A4. The strip-shaped hole 6.3.1 provided on the support plate 6.3 of the first connecting piece 6 allows the connecting bolt A4 to move horizontally and rotate, and the energy is dissipated in the horizontal and rotational directions through the U-shaped connecting plate 7 and the brass friction plate 8, thereby improving the seismic capacity of the structure. The first plug-in plate 8.1 and the triangular stiffening plate 8.3 of the plug-in piece 8 improve the load-carrying capacity of the connection, and the bolt insertion hole (compared with the existing single-web H-shaped steel penetrating hole) enhances the connection capacity, and the tensile, pull-out and shear capacities of the bolt are largely utilized. The pre-tightening force of the connecting bolt A4 is transmitted to the brass friction plate 8 through the rigid backing plate 10, and increasing the pre-tightening force of the high-strength bolt can increase the friction energy dissipation of the joint. The plug-in piece 8 connects the first connecting piece 6 in the joint area to the steel beam 5, and the U-shaped connecting plate 7 can also be replaced after the earthquake.

[0073] A construction method of a connection joint between a steel tube confined reinforced concrete column and a steel beam, comprising the following steps:

[0074] S1: design and prefabrication of each component: according to the design size of the steel beam and the reinforced concrete column 11, the size of each component is determined, and the components are prefabricated in the factory.

[0075] According to the design size of the steel beam 5 and the reinforced concrete column 11, the size of each component is determined, such as the size of the upper steel pipe section 1, the lower steel pipe section 2, and the middle joint section 3, and the size of the reinforcing ring plate 3.2, the rib plate 3.3, the first connecting piece 6, and the energy dissipation assembly.

[0076] The components are prefabricated in the factory. For the upper steel pipe section 1 and the lower steel pipe section 2, a square cross-section steel pipe can be made by a series of processing techniques from a steel plate; the holes and notches of the rectangular steel pipe 3.1 and the first connecting piece 6 can be laser cut. The steel beam 5 can be drilled at the marked line using a drilling machine; the components are prefabricated and processed in the factory.

[0077] S2: connecting the middle joint section 3 and the first connecting piece 6 in the factory; positioning and connecting the two rectangular steel pipes 3.1 by inserting them through the rib plate 3.3 into the rib plate slot 3.121 in the factory; screwing the first connecting piece 6 with the inner side plate 3.12 and the rib plate 3.3 through the notches of the rectangular steel pipe 3.1; then sleeving the reinforcing ring plate 3.2 on the top and bottom of the two rectangular steel pipes 3.1, and welding the joint between the reinforcing ring plate 3.2 and the rectangular steel pipe 3.1.

[0078] S3: binding the column longitudinal reinforcement 11.1 and the column stirrup 11.2 in the lower steel pipe section 2 on site; hoisting the lower steel pipe section 2 vertically around the outer periphery of the column reinforcement cage, with the column longitudinal reinforcement 11.1 protruding above the middle joint section 3 by a certain height; hoisting the assembled part obtained in step S2 above the lower steel pipe section 2, and aligning the column longitudinal reinforcement 11.1 with the corresponding column longitudinal reinforcement 11.1; then binding the column longitudinal reinforcement 11.1 and the column stirrup 11.2 in the upper steel pipe section 1, and hoisting the upper steel pipe section 1 vertically around the outer periphery of the column reinforcement cage; leaving a construction joint between the lower steel pipe section 2, the upper steel pipe section 1, and the middle joint section 3; and connecting and fixing the lower steel pipe section 2, the upper steel pipe section 1, and the middle joint section 3 by setting temporary supports such as installing matching ear plates and fixing supports; no column stirrup is arranged inside the middle joint section 3;

[0079] S4: hoisting the steel beam 5 and connecting and installing the energy dissipation assembly; first, bolt installing the plug-in piece 8, the brass friction plate 9, and the rigid pad 10, and then bolt installing the upper and lower U-shaped connecting plates 7.

[0080] S5: Steel pipe serves as a formwork, without removing the formwork, and the construction joint is filled with rubber rods and taped on both sides of the rubber rods to serve as a formwork, so as to seal the construction joint; then the column body concrete is poured in the upper steel pipe section 1, the lower steel pipe section 2 and the middle node section 3, and the layered pouring and layered vibrating mode is adopted to form the reinforced concrete column 11; after the concrete column 11.3 reaches the strength requirement, the formwork at the construction joint and the temporary support (such as the matching lug plate and the fixed support) are removed.

[0081] Example Two

[0082] The structures, configurations and construction methods of Example Two are the same as those of Example One, except for the following design: the connecting bolt A4 is a high-strength bolt, and one high-strength bolt is provided, and correspondingly, the brass friction plate 9, the rigid backing plate 10 and the first plug-in plate 8.1 are each provided with one bolt hole matched with the high-strength bolt, and the support plate 6.3 of the first connecting piece 6 is provided with an adjusting hole, and the brass friction plate 9, the rigid backing plate 10, the first plug-in plate 8.1 and the support plate 6.3 of the first connecting piece 6 are connected by the high-strength bolt, as shown in Figures 14-17 .

[0083] In this embodiment, the energy dissipation assembly includes the U-shaped connecting plate 7, the plug-in piece 8, the rigid backing plate 10, the brass friction plate 9 and the connecting bolt A4, and the strip-shaped hole 6.3.1 provided on the support plate 6.3 of the first connecting piece 6 allows the connecting bolt A4 to move horizontally and rotate, and the energy is dissipated in the horizontal and rotational directions through the U-shaped connecting plate 7 and the brass friction plate 8, thereby improving the seismic capacity of the structure. The first plug-in plate 8.1 and the triangular stiffening plate 8.3 of the plug-in piece 8 improve the load-carrying capacity of the connection, the high-strength bolt is connected with the friction brass sheet, the plug-in piece 8 and the support plate 6.3 of the first connecting piece 6 to form a rotational friction hinge, and the support plate 6.3 of the first connecting piece 6 is provided with a single bolt hole, so that the energy dissipation assembly can move horizontally and rotate. The connecting bolt A4 is a high-strength bolt, and the pre-tightening force of the high-strength bolt is transmitted to the brass friction plate 9 through the rigid backing plate 10, and increasing the pre-tightening force of the high-strength bolt can increase the friction energy dissipation of the node, and the plug-in piece 8 allows the first connecting piece 6 in the node area to be connected to the steel beam 5 through transition and transition; and the U-shaped connecting plate 7 can also be replaced after the earthquake.

[0084] The node structure is installed and then concrete pouring is carried out, the steel pipe serves as a formwork, rubber rods are filled between structural joints, and the rubber rods are pasted on two sides of the rubber rods by using adhesive tape to serve as a formwork, so that the structural joints are closed; most of the components of the node are prefabricated and assembled in a factory, and only need to be assembled on site, so that the problem of complex construction of the beam-column node is effectively solved, the brass friction plate and the rigid backing plate only need to be installed on the first connecting piece, and the installation difficulty of the connecting part is reduced; the two rectangular steel pipes 3.1 of the middle node section 3 do not need to be bound with stirrups, the construction difficulty is reduced, the construction progress is improved, the construction period is accelerated, and the assembly type installation mode has the advantages of green construction. The node has the advantages of reasonable force transmission, strong bearing capacity and the like, achieves the purpose of "strong column and weak beam", and has the advantages of convenient construction, good ductility and good seismic performance.

[0085] In the application, the first connecting piece 6 is respectively bolted with the steel pipe of the middle node section 3, the rib plate, welded with the joint of the outer wall of the two rectangular steel pipes of the node section and connected with the reinforcing ring plate of the middle node section and the rectangular steel pipe, so that the overall connection of the node area is realized; the connection between the supporting plate 6.3 of the first connecting piece 6, the rib plate 3.3 and the rectangular steel pipe 3.1 of the node area forms a field-shaped structure in the middle node section 3, expands the constraint area of the core concrete, enhances the constraint effect of the steel pipe on the concrete, increases the compression bearing capacity, the shear capacity and the stiffness of the node, and improves the connection strength of the whole node area.

[0086] The connection structure of the beam-column node effectively transmits the bending moment of the steel beam 5 and the shear force of the steel beam 5 to the node area, strengthens the shear strength of the node, so that the outer steel pipe of the node area concrete column does not directly bear the bearing capacity transmitted by the steel beam 5, but the first connecting piece 6, the concrete, the internal steel pipe and the rib plate 3.3 of the node area bear the bearing capacity transmitted by the steel beam 5. Part of the bending moment transmitted by the steel beam 5 is transmitted to the node area in the form of flange force through the first connecting piece 6, and the inner end flange (i.e. the top plate 6.1 and the bottom plate 6.2) of the first connecting piece 6 extending into the concrete column effectively transmits the bending moment to the concrete column 11.3; part of the bending moment is effectively transmitted to the rib plate 3.3 through the bolt connecting the rib plate 3.3 in the transverse direction and the rib plate 3.3, and the bolt connecting the rib plate 3.3 in the longitudinal direction and the long-side inner plate 3.12, so as to enhance the bending strength of the node; the shear force of the steel beam 5 is mainly transmitted to the node area through the supporting plate 6.3 of the first connecting piece 6, the supporting plate 6.3 of the first connecting piece 6 in the transverse direction is connected with the rib plate 3.3 through the bolt, so as to effectively transmit the shear force to the rib plate 3.3, and the supporting plate 6.3 of the first connecting piece 6 in the longitudinal direction is connected with the long-side inner plate 3.12 of the rectangular steel pipe 3.1 through the bolt, so as to effectively transmit to the node area, and enhance the shear strength of the node.

[0087] In the application, the cross section of the first connecting piece 6 is sub-letter type, and the shear bearing capacity is higher compared with the H-shaped steel beam 5. The first connecting piece 6 is connected with the H-shaped steel beam 5, which not only takes into account the H-shaped steel beam 5 commonly used in most projects, but also improves the shear bearing capacity of the beam in the joint.

[0088] In the application, the energy dissipation assembly includes a U-shaped connecting plate 7 and a plug-in piece 8, which dissipates energy in the horizontal direction and the rotating direction through the U-shaped connecting plate 7 and the brass friction plate 9, and makes the plastic hinge of the beam-column joint move outward, greatly improving the seismic capacity of the whole structure. The first plug-in plate 8.1 of the plug-in piece 8 improves the bearing capacity of the connection, and the bolt insertion hole of the connection enhances the connection capacity compared with the single-web H-shaped steel perforation, greatly utilizing the tensile, anti-pulling and shear capacity of the bolt. The U-shaped connecting plate 7 can also be replaced after the earthquake.

[0089] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0090] Finally, it should be pointed out that the above is only the preferred embodiment of the application and is not intended to limit the application, although the application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for some technical features, but any modification, equivalent replacement, improvement, etc. within the spirit and principles of the application should be included in the protection scope of the application.

Claims

1. A connection joint of a steel pipe confined reinforced concrete column and a steel beam, characterized by, The steel pipe confined reinforced concrete column, the steel beams, the first connecting members and the energy dissipation components are arranged in the steel pipe confined reinforced concrete column. The steel beams are arranged along the outer wall of the steel pipe confined reinforced concrete column. The steel pipe confined reinforced concrete column comprises an upper steel pipe section, a lower steel pipe section, a middle node section between the upper and lower steel pipe sections, and a reinforced concrete column poured in the lower steel pipe section, the middle node section and the upper steel pipe section. The upper and lower steel pipe sections are respectively provided with a construction joint between the middle node section. The reinforced concrete column comprises column longitudinal reinforcement, column stirrups and a concrete column, and the column longitudinal reinforcement and the column stirrups form a steel framework. The middle node section is fixed with the first connecting members corresponding to the number of the steel beams, and the end of the steel beam is connected with the first connecting member through the energy dissipation component. The first connecting member comprises a top plate, a bottom plate and two support plates arranged between the top plate and the bottom plate. The inner end of the top plate, the bottom plate and the support plates are inserted into the middle node section and connected with the middle node section through bolts. The middle node section comprises two rectangular steel pipes, the inner side plates of the long edges of the two rectangular steel pipes are arranged oppositely and welded, the top and bottom of the two rectangular steel pipes are connected through a reinforcing ring plate respectively, forming an integrated structure with the same cross section as the upper and lower steel pipe sections. The inner side plates of the long edges of the rectangular steel pipes are provided with rib plate grooves, and a rib plate is inserted into the rib plate grooves of the two rectangular steel pipes. The outer side plates of the long edges of the rectangular steel pipes are provided with an upper slot, two middle slots and a lower slot, which are adapted to the top plate, the two support plates and the bottom plate of the first connecting member in sequence.

2. The steel tube reinforced concrete column-to-steel beam connection joint according to claim 1, wherein The top plate, the support plates and the bottom plate of the first connecting member are inserted into the corresponding slots, and the rib plate is located between the two support plates of the first connecting member.

3. The steel tube reinforced concrete column-to-steel beam connection joint according to claim 2, wherein The top and bottom of the rib plate are located in the gap of the top plate and the bottom plate of the first connecting member respectively. The steel pipe confined reinforced concrete column has a rectangular cross section. The energy dissipation component comprises a U-shaped connecting plate and a plug-in piece. The upper flange plate of the steel beam is flush with the top plate of the first connecting member and connected through the U-shaped connecting plate and connecting bolts. The lower flange plate of the steel beam is flush with the bottom plate of the first connecting member and connected through the U-shaped connecting plate and connecting bolts. The energy dissipation component further comprises a brass friction plate and a rigid pad plate arranged outside the support plate in sequence. The inner end of the bottom plate of the first connecting member is provided with a gap in the middle, forming a single-sided bottom plug plate with the outer ends connected and the inner ends separated. The inner end of the top plate of the first connecting member is provided with a gap in the middle, forming a single-sided top plug plate with the outer ends connected and the inner ends separated. The plug-in piece comprises a first plug-in plate and a second plug-in plate provided with a clamping groove, the first plug-in plate and the second plug-in plate are connected, and both are provided with bolt holes. The first plug-in plate is inserted into the two support plates of the first connecting member and connected through connecting bolts A. The web end of the steel beam is inserted into the clamping groove of the second plug-in plate and connected through bolts. The connection between the first plug-in plate and the second plug-in plate is provided with a triangular stiffener.

4. The steel tube reinforced concrete column-to-steel beam connection joint according to claim 3, wherein The U-shaped connecting plate comprises horizontal plate segments on two sides and a U-shaped plate segment in the middle, and a plurality of bolt holes are formed on the horizontal plate segments; the U-shaped connecting plate at the top is overlapped on the top plate of the first connecting member and the flange plate of the steel beam, the U-shaped plate segment is arched upward, one side of the horizontal plate segment is connected to the upper flange plate of the steel beam through a bolt, and the other side of the horizontal plate segment is connected to the top plate of the first connecting member through a connecting bolt; the U-shaped connecting plate at the bottom is arranged at the bottom of the bottom flange plate of the steel beam and the bottom plate of the first connecting member, the U-shaped plate segment is arched downward, one side of the horizontal plate segment is connected to the bottom flange plate of the steel beam through a bolt, and the other side of the horizontal plate segment is connected to the bottom plate of the first connecting member through a bolt.

5. The steel tube reinforced concrete column-to-steel beam connection joint according to claim 4, wherein The brass friction plate and the rigid backing plate are respectively provided with bolt holes corresponding to the positions of the connecting bolts A; the connecting bolts A pass through the bolt holes on the brass friction plate, the rigid backing plate and the first plug-in plate, and the bolt holes on the support plate of the first connecting member, so as to connect the steel beam, the plug-in member, the first connecting member and the middle node segment into an integral whole.

6. The steel tube reinforced concrete column-to-steel beam connection joint according to claim 5, wherein The support plate of the first connecting member is provided with a strip-shaped hole, and the length direction of the strip-shaped hole is consistent with the length direction of the steel beam; the connecting bolt A is matched with the strip-shaped hole.

7. The steel tube reinforced concrete column-to-steel beam connection joint according to claim 2, wherein The short side plates of the two rectangular steel pipes are arranged side by side, and the two are connected to the same first connecting member; the two short side plates of the rectangular steel pipe are respectively provided with a single-side upper slot, a single-side middle slot and a single-side lower slot, and the single-side upper slot, the single-side middle slot and the single-side lower slot are matched with the single-side top plug-in plate, one of the support plates and the single-side bottom plug-in plate of the first connecting member respectively; the first connecting member located outside the short side plates of the two rectangular steel pipes, one side of the single-side top plug-in plate, the support plate and the single-side bottom plug-in plate are respectively inserted into the single-side upper slot, the single-side middle slot and the single-side lower slot on one of the short side plates of the rectangular steel pipe, and the other side of the single-side top plug-in plate, the support plate and the single-side bottom plug-in plate of the first connecting member are respectively inserted into the single-side upper slot, the single-side middle slot and the single-side lower slot on the other short side plate of the rectangular steel pipe, the long side inner plates of the two rectangular steel pipes are clamped between the two support plates, and the top and the bottom pass through the gaps of the top plate and the bottom plate of the first connecting member respectively, and the long side inner plates of the two rectangular steel pipes and the two support plates of the first connecting member are connected through bolts.

8. A method of constructing a joint node as claimed in any one of claims 1 to 7, characterised in that, The method comprises the following steps: S1: design and prefabrication of node components: according to the design size of the steel beam and the reinforced concrete column, the size of each component is determined, and the component is prefabricated in the factory; S2: connecting the middle node segment and the first connecting member in the factory to obtain an assembly; S3: on-site binding of column longitudinal reinforcement and column stirrups in the lower steel pipe segment; hoisting the lower steel pipe segment vertically around the outer periphery of the column reinforcement cage, and the column longitudinal reinforcement is higher than the middle node segment; hoisting the assembly obtained in step S2 above the lower steel pipe segment, and aligning the column longitudinal reinforcement through hole with the corresponding column longitudinal reinforcement; again binding the column longitudinal reinforcement and the column stirrups in the upper steel pipe segment; hoisting the upper steel pipe segment vertically around the outer periphery of the column reinforcement cage; reserving a construction joint between the lower steel pipe segment, the upper steel pipe segment and the middle node segment, and connecting and fixing the lower steel pipe segment, the upper steel pipe segment and the middle node segment by means of setting temporary support; no column stirrup is arranged in the middle node segment; S4: hoist steel beam and install the energy dissipation component; first bolt the insert, brass friction plate and rigid backing plate, the brass friction plate and rigid backing plate are installed on the first connector only, then bolt the upper and lower U-shaped connecting plates; S5: the steel pipe serves as a formwork, and a rubber rod is filled in the construction joint and taped on both sides of the rubber rod to serve as a formwork, so as to seal the construction joint; then the column concrete is poured in the upper steel pipe section, lower steel pipe section and middle node section, and the column is formed by using the layered pouring and layered vibrating mode; after the column concrete reaches the strength requirement, the formwork and temporary support at the construction joint are removed.

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