Steel reinforced concrete column and beam connecting joint structure and construction method thereof

Abstract

A kind of steel skeleton confined concrete column and beam connecting node structure, including steel skeleton confined concrete column and structural beam;The steel skeleton confined concrete column includes longitudinal steel skeleton, concrete, additional reinforcement, shear member, flange restraint;The longitudinal steel skeleton includes steel skeleton web and steel skeleton flange;The concrete includes internal concrete and external concrete;The flange restraint is arranged along steel skeleton flange end portion interval;The additional reinforcement is located in the outside of longitudinal steel skeleton and flange restraint;Corresponding structural beam is provided with horizontal steel connecting piece at the position, and the transverse steel connecting piece includes transverse steel connecting piece flange and transverse steel connecting piece web;The transverse steel connecting piece is located in the outside of steel skeleton flange, and is fixedly connected with steel skeleton flange;The steel connecting piece flange is lower than the top of longitudinal steel skeleton;The structural beam is connected with longitudinal steel skeleton as a whole.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of concrete structure, and particularly relates to a steel-reinforced concrete column and beam connecting joint structure. BACKGROUND

[0002] Building industrialization is the focus of national construction development, and the mainstream column structure of building industrialization at present is cast-in-situ steel-reinforced column. This structure system has defects of greater difficulty in construction quality control, longer construction period, lower tensile strength, poorer seismic performance, poorer ductility under the action of earthquake and easy brittle failure. Steel-reinforced concrete column has advantages of large bearing capacity and good ductility, but the steel-reinforced protective layer is thick, and the specification requires not less than 200mm. This structure has complex relationship between steel and steel bars, and has disadvantages of construction difficulty, quality difficulty to guarantee and small steel-reinforced bending bearing capacity. SUMMARY

[0003] The purpose of the present application is to provide a steel-reinforced concrete column and beam connecting joint structure, and to solve the technical problems of low bending and shearing bearing capacity and low ductility of traditional steel-reinforced concrete column in connecting area. The steel-reinforced concrete column and beam connecting joint structure can significantly improve the out-of-plane bending stiffness and bearing capacity of the connecting part, is convenient for construction, can improve the construction quality and construction speed, and has advantages of good mechanical properties, simple production, rapid construction, green environmental protection and the like.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0005] A steel-reinforced confined concrete column-beam connection structure includes a structural column and a structural beam. The structural column comprises longitudinal steel reinforcement, concrete, external reinforcement, shear members, and flange restraints. The longitudinal steel reinforcement includes a steel web and steel flanges, which are fixedly connected. The concrete includes inner and outer concrete. The external reinforcement includes outer transverse and outer vertical reinforcement; the outer vertical and transverse reinforcements are steel bars and / or FRP bars. The outer vertical reinforcement is fixedly connected, discontinuously connected, or disconnected along the vertical direction on the outside of the concrete. The longitudinal steel reinforcement runs vertically throughout the concrete. The shear members are spaced along the longitudinal steel reinforcement and fixedly connected to it. The flange restraints are spaced along the ends of the steel flanges, with both ends fixedly connected to adjacent steel flanges. The steel flanges and flange restraints enclose the inner concrete, providing shear support for the steel beams. The inner concrete forms a constraint; the external reinforcement is located outside the longitudinal steel frame and flange constraint members; the external vertical reinforcement is arranged circumferentially at intervals outside the longitudinal steel frame; the external transverse reinforcement is arranged vertically at intervals outside the external vertical reinforcement, forming a reinforcement mesh or reinforcement cage together with the external vertical reinforcement; the external reinforcement and the external concrete together form an external reinforced concrete layer, which wraps around the longitudinal steel frame transversely; horizontal steel connectors are provided at the positions corresponding to the structural beams, and the transverse steel connectors include transverse steel connector flanges and transverse steel connector webs; the transverse steel connectors are located outside the steel frame flanges and are fixedly connected to the steel frame flanges; there are transverse connecting steel plates inside the steel frame flanges, and the positions of the transverse connecting steel plates correspond to the transverse steel connector flanges and are fixedly connected to the longitudinal steel frame; the steel connector flanges are lower than the top of the longitudinal steel frame; the structural beam and the longitudinal steel frame are connected as one unit.

[0006] Preferably, the flange restraint is a steel bar and / or a steel plate, and the flange restraint is welded or bolted to the steel flange.

[0007] Preferably, additional flange restraints are arranged at intervals at the ends of adjacent steel flanges, and the steel flanges are fixedly connected to the additional flange restraints, with the additional restraints surrounding the concrete.

[0008] Preferably, internal reinforcing bars are provided at intervals on the sides of each set of flange restraints and / or additional flange restraints.

[0009] Preferably, discontinuous reinforcing bars are provided at corresponding positions on the outer side of the steel frame flange; the discontinuous reinforcing bars are broken at the structural beam to be installed.

[0010] Preferably, in the connection node of the two steel-reinforced concrete columns, the longitudinal steel members of the upper steel-reinforced concrete column are fixedly connected to the longitudinal steel members of the lower steel-reinforced concrete column, and the steel member flanges and steel member webs are arranged accordingly; the outer vertical reinforcement of the upper steel-reinforced concrete column is fixedly connected to the outer vertical reinforcement of the lower steel-reinforced concrete column.

[0011] Preferably, the structural beam is a precast concrete beam or a steel beam or a steel reinforced concrete beam; the longitudinal steel skeleton is connected with the structural beam by welding or bolting or a combination of bolting and welding.

[0012] Preferably, the axial compression bearing capacity checking method of the structural column comprises the following specific steps:

[0013] Step 1, determining the size of the longitudinal steel skeleton, the steel strength parameter, the diameter of the external vertical reinforcement, the external vertical reinforcement strength parameter, the column section size, the concrete strength parameter, the interval distance, the size and the strength parameter of the flange restraint;

[0014] Step 2, calculating the axial compression of the steel-reinforced concrete column under different load conditions, and combining to obtain the maximum axial compression;

[0015] Step 3, calculating the axial compression bearing capacity of the steel-reinforced concrete column; the checking can be performed according to the following formula or detailed calculation according to the existing design specification:

[0016] N= φ ψ f a A a + α 1 f c A c + ξ η α 1 f c A c )

[0017] η=μζ

[0018] ζ= f a A a / f c A c

[0019] In the formula: N is the design value of the axial compression of the steel-reinforced concrete column;

[0020] φ is the stability coefficient of the steel-reinforced concrete column

[0021] ψ is the reduction coefficient of the column axial compression bearing capacity;

[0022] ξ is the reduction coefficient of the concrete constraint effect;

[0023] η is the concrete constraint effect coefficient; ​

[0024] μ - equivalent cavity influence coefficient;

[0025] ζ - equivalent sleeve index;

[0026] A a - the sum of the cross-sectional area of the continuous steel skeleton (mm2) ;

[0027] A c - the sum of the net cross-sectional area of the concrete (mm2) ;

[0028] α 1 - the coefficient of the compressive stress of the concrete in the compression zone.

[0029] f c - the design value of the axial compressive strength of the concrete (MPa) ;

[0030] f a - the design value of the compressive and tensile strength of the steel plate of the continuous steel skeleton (MPa) ;

[0031] The strength parameters in the formula are valued according to the existing national standards or through experiments, and the geometric parameters are valued according to the actual size or nominal size. Repeat steps 1-3, and the internal force and deformation of the steel-reinforced concrete column are calculated. The axial compression capacity is compared with the maximum axial pressure calculated by the actual working load of the structure. Greater than the maximum axial pressure.

[0032] Preferably, the construction method of the steel-reinforced concrete column and beam connection joint structure comprises the following steps:

[0033] Step one, make longitudinal steel skeleton and shear-resistant parts and transverse steel connecting parts in the factory

[0034] When the steel skeleton is made of profile steel, the specific construction method is as follows:

[0035] Step a, select profile steel suitable for longitudinal steel skeleton, pre-produce flange restraint parts, shear-resistant parts, transverse steel connecting parts and transverse connecting steel plates;

[0036] Step b, lay out according to the design drawing;

[0037] Step c, cut the profile steel;

[0038] Step d, weld the longitudinal steel skeleton, transverse steel connecting parts and transverse connecting steel plates into one;

[0039] Step e, weld or bolt the longitudinal steel skeleton and the flange restraint parts into one;

[0040] Step f, welding the longitudinal steel skeleton and the shear member into one body;

[0041] When the steel skeleton is made of steel plate, the specific construction method is as follows:

[0042] Step A, selecting a steel plate suitable for the longitudinal steel skeleton, and pre-preparing the flange restraint member, the shear member, the transverse steel connecting member and the transverse connecting steel plate;

[0043] Step B, laying out according to the design drawing;

[0044] Step C, cutting the steel plate;

[0045] Step D, welding the steel plate into a steel rod member suitable for the cross-sectional shape of the longitudinal steel skeleton;

[0046] Step E, welding the longitudinal steel skeleton, the transverse steel connecting member and the transverse connecting steel plate into one body

[0047] Step F, welding or bolting the longitudinal steel skeleton and the flange restraint member into one body;

[0048] Step G, welding the longitudinal steel skeleton and the steel shear member into one body;

[0049] Step two, constructing the longitudinal steel skeleton, and fixing after horizontal and vertical calibration and positioning;

[0050] Step three, constructing the structural beam, and connecting with the longitudinal steel skeleton after horizontal and vertical calibration and positioning;

[0051] Step four, binding the external reinforcement;

[0052] Step five, setting the formwork of the structural column;

[0053] Step six, pouring concrete and curing to the predetermined strength.

[0054] Compared with the prior art, the present application has the following characteristics and beneficial effects.

[0055] 1. The steel skeleton confined concrete column and beam connecting node of the present application is higher than the height of the transverse member, and has high bending and shear carrying capacity and high ductility in the connecting area.

[0056] 2. The steel skeleton confined concrete column and beam connecting node structure of the present application has a pull member arranged on the flange of the column steel skeleton to constrain the internal concrete component and improve the ductility of the column.

[0057] 3. The steel skeleton confined concrete column and beam connecting node structure of the present application has non-continuous connection or disconnection of the vertical reinforcement on the outer side corresponding to the flange, which facilitates vertical connection.

[0058] 4. The steel skeleton confined concrete column of the present application has a steel skeleton flange with a distance from the outer edge of the column concrete of not more than 200 mm, which improves the bending carrying capacity of the column steel skeleton. Attached image description:

[0059] The present invention will now be described in further detail with reference to the accompanying drawings.

[0060] Figure 1 This is an elevation view of the connection node between a steel-reinforced concrete column and a beam.

[0061] Figure 2 This is a schematic cross-sectional view of a steel-reinforced concrete column without transverse steel connectors.

[0062] Figure 3 This is a cross-sectional schematic diagram of a steel-reinforced concrete column with transverse steel connectors.

[0063] Figure 4 This is a schematic elevation view of a steel-reinforced concrete column.

[0064] Figure 5 This is a schematic elevation view of the connection between the upper and lower steel-reinforced concrete columns.

[0065] Reference numerals: 1 – Longitudinal steel frame, 1.1 – Steel frame web, 1.2 – Steel frame flange, 1.3 – Transverse connecting steel plate, 2 – Concrete, 2.1 – Inner concrete, 2.2 – Outer concrete, 3 – Flange restraint, 4 – External reinforcement, 4.1 – External vertical reinforcement, 4.2 – External transverse reinforcement, 6 – Inner reinforcement, 7 – Ear plate, 8 – Shear member, 10 – Transverse steel connector, 10.1 – Transverse steel connector web, 10.2 – Transverse steel connector flange, 11 – Additional flange restraint, 12 – Discontinuous reinforcement, A – Steel-reinforced concrete column, B – Structural beam.

[0066] Detailed Embodiments: To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0067] In the description of this invention, it should be understood that the terms "comprising / including," "consisting of," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements includes not only those elements but may also include, where necessary, other elements not expressly listed, or elements inherent to such a product, apparatus, process, or method. Without further limitation, an element defined by the phrase "comprising / including…" or "consisting of…" does not exclude the presence of additional identical elements in the product, apparatus, process, or method that includes said element.

[0068] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0069] The fixed connection of the steel bar refers to the connection of the steel bars by sleeves, welding and lap joint, and the lap joint length meets the length required by the current concrete structure design specification. The non-continuous connection of the steel bar refers to the disconnection of the steel bar, or the connection, but the connection length is less than the lap joint length of the steel bar required by the current concrete structure design specification.

[0070] The fixed connection of the steel member refers to the welding or bolting connection of the steel member to be integrated.

[0071] It should also be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a particular orientation, be constructed or operated in a particular orientation, and cannot be understood as a limitation on the present application.

[0072] The implementation of the present application is described in detail in the preferred embodiments in combination with the drawings.

[0073] As Figures 1-4As shown, a kind of steel-reinforced concrete column and beam connecting node structure, including structural column A and structural beam B;The structural column A includes longitudinal steel bone 1, concrete 2, additional reinforcement 4, shear member 8, flange restraint 3;The longitudinal steel bone 1 includes steel bone web 1.1 and steel bone flange 1.2, steel bone web 1.1 and steel bone flange 1.2 fixed connection;The concrete 2 includes inner concrete 2.1 and outer concrete 2.2;The additional reinforcement 4 includes outer transverse reinforcement 4.2 and outer vertical reinforcement 4.1;The outer vertical reinforcement 4.1 and outer transverse reinforcement 4.2 are steel bars and / or FRP bars;The outer vertical reinforcement 4.1 is fixedly connected or discontinuously connected or disconnected in the vertical direction on the outer side of the concrete 2;The longitudinal steel bone 1 is vertically arranged in the concrete 2;The shear member 8 is arranged along the longitudinal steel bone 1 at intervals, and is fixedly connected with the longitudinal steel bone 1;The flange restraint 3 is arranged along the end of the steel bone flange 1.2 at intervals, and is fixedly connected with the adjacent steel bone flange 1.2 at both ends;The steel bone flange 1.2 and the flange restraint 3 surround the inner concrete 2.1, and form a constraint for the inner concrete 2.1;The additional reinforcement 4 is located on the outer side of the longitudinal steel bone 1 and the flange restraint 3;The outer vertical reinforcement 4.1 is arranged on the outer side of the longitudinal steel bone 1 at intervals in the circumferential direction;The outer transverse reinforcement 4.2 is arranged on the outer side of the outer vertical reinforcement 4.1 at intervals in the vertical direction, and forms a reinforced mesh or a reinforced cage together with the outer vertical reinforcement 4.1;The additional reinforcement 4 forms an outer reinforced concrete layer together with the outer concrete 2.2, and wraps the longitudinal steel bone 1 in the transverse direction;A horizontal steel connecting member 10 is arranged at the position corresponding to the structural beam B, and the transverse steel connecting member 10 includes a transverse steel connecting member flange 10.2 and a transverse steel connecting member web 10.1;The transverse steel connecting member 10 is located on the outer side of the steel bone flange 1.2, and is fixedly connected with the steel bone flange 1.2;The steel bone flange 1.2 has a transverse connecting steel plate 1.3 inside, and the transverse connecting steel plate 1.3 is arranged at a position corresponding to the transverse steel connecting member flange 10.2, and is fixedly connected with the longitudinal steel bone 1;The steel connecting member flange 10.2 is lower than the top of the longitudinal steel bone 1;The structural beam B is connected with the longitudinal steel bone 1 as a whole.

[0074] Preferably, the horizontal section of the longitudinal steel bone 1 is in the shape of L, I, or king character, etc.;An ear plate 7 is arranged at intervals on the top of the longitudinal steel bone 1, and is used for temporary fixing during construction.

[0075] Preferably, the distance between the steel bone flange 1.2 and the outer edge of the column concrete is not more than 200 mm, and is preferably 20-100 mm. The column steel bone flange 1.2 is arranged outside the column, so as to improve the bending capacity of the column.

[0076] Preferably, the shear member 8 is a stud, a steel bar, a steel plate or a profile steel.

[0077] Preferably, the flange restraint 3 is a steel bar and / or a steel plate, and is connected with the steel bone flange 1.2 by welding or bolting.

[0078] As preferred, the flange constraints 3 are arranged vertically in parallel and at intervals, the distance between the flange constraints is 10mm-1000mm, preferably 50mm-500mm

[0079] Further, the flange additional constraints 11 are arranged at intervals between the ends of the adjacent steel flange 1.2, the steel flange 1.2 is fixedly connected with the flange additional constraints 11, and the additional constraints enclose the concrete 2.

[0080] As preferred, the flange additional constraints 11 are L-shaped, arc-shaped or triangular, and the flange additional constraints 11 are staggered vertically with the flange constraints 3.

[0081] Further, the inner reinforcement 6 is arranged at intervals on the side of each group of flange constraints 3 and / or flange additional constraints 11 to jointly constrain the concrete and increase the bending capacity and ductility; the inner reinforcement 6 is vertical reinforcement or a reinforcement cage composed of vertical reinforcement and horizontal reinforcement.

[0082] Further, the discontinuous reinforcement 12 is arranged at the corresponding position outside the steel flange 1.2; the discontinuous reinforcement 12 is disconnected at the position of the to-be-installed structural beam B.

[0083] Further, as shown in Figure 5 The longitudinal steel 1 of the upper steel-reinforced concrete column is fixedly connected with the longitudinal steel 1 of the lower steel-reinforced concrete column, the steel flange 1.2 and the steel web 1.1 are arranged correspondingly; the outer vertical reinforcement 4.1 of the upper steel-reinforced concrete column is fixedly connected with the outer vertical reinforcement 4.1 of the lower steel-reinforced concrete column; the connecting position is higher than the position of the horizontal floor, so that the bending moment and shear force at the connecting position are smaller.

[0084] As preferred, the structural beam B is a prefabricated concrete beam or a steel beam or a steel reinforced concrete beam; the longitudinal steel 1 and the structural beam B are connected by welding or bolting or a combination of bolting and welding.

[0085] Further, the axial compression bearing capacity checking method of the structural column A is as follows:

[0086] Step 1, determine the size of the longitudinal steel 1 or steel plate, the steel strength parameter, the diameter of the outer vertical reinforcement 4.1 fixedly connected, the strength parameter of the outer vertical reinforcement 4.1, the column section size, the concrete strength parameter, the interval distance, the size and the strength parameter of the flange constraint 3;

[0087] Step 2, calculate the axial compression of the steel-reinforced concrete column under different load conditions, and combine to obtain the maximum axial compression;

[0088] Step 3, calculate the axial compression bearing capacity of steel-reinforced concrete column; can be checked according to the following formula or according to the existing design specification for detailed calculation:

[0089] N= φ ψ f a A a α 1 f c A c + ξ η α 1 f c A c

[0090] η=μζ

[0091] ζ= f a A a f c A c

[0092] In the formula: N - steel-reinforced concrete column axial compression design value;

[0093] φ - Stability coefficient of steel-reinforced concrete column

[0094] ψ - Column axial compression bearing capacity reduction factor;

[0095] ξ - Reduction factor of concrete confinement effect;

[0096] η - Concrete confinement effect coefficient;

[0097] μ - Equivalent cavity influence coefficient;

[0098] ζ - Equivalent sleeve index;

[0099] A a - The sum of continuous steel section area (mm2) ;

[0100] A c - The sum of net section area of concrete (mm2) ;

[0101] α 1 - The influence coefficient of compressive stress of concrete in compression zone.

[0102] f c ​​​​— Design value of axial compressive strength of concrete (MPa) ;

[0103] f a — Design value of compressive and tensile strength of continuous steel plate (MPa) ;

[0104] The strength parameters in the formula are valued according to the existing national standards or through experiments, and the geometric parameters are valued according to the actual size or nominal size, and the internal force and deformation of the steel-reinforced concrete column are calculated by repeating steps 1-3. The axial compression bearing capacity is compared with the maximum axial pressure calculated by the actual working load of the structure. Greater than the maximum axial pressure.

[0105] Further, the construction method of the steel-reinforced concrete column and beam connection joint structure comprises the following steps:

[0106] Step one, make longitudinal steel 1 and shear-resistant piece 8 and transverse steel connecting piece 10 in the factory

[0107] When the steel is made of steel, the specific construction method is:

[0108] Step a, select steel that is suitable for longitudinal steel 1, and pre-make flange restraint piece 3, shear-resistant piece 8, transverse steel connecting piece 10 and transverse connecting steel plate 1.3;

[0109] Step b, lay out according to the design drawing;

[0110] Step c, cut the steel;

[0111] Step d, weld longitudinal steel 1 and transverse steel connecting piece 10 and transverse connecting steel plate 1.3 into one;

[0112] Step e, weld or bolt longitudinal steel 1 and flange restraint piece 3 into one;

[0113] Step f, weld longitudinal steel 1 and shear-resistant piece 8 into one;

[0114] When the steel is made of steel plate, the specific construction method is:

[0115] Step A, select steel plate that is suitable for longitudinal steel 1, and pre-make flange restraint piece 3, shear-resistant piece (8), transverse steel connecting piece 10 and transverse connecting steel plate 1.3;

[0116] Step B, lay out according to the design drawing;

[0117] Step C, cut the steel plate;

[0118] Step D, weld the steel plate into a steel rod piece that is suitable for the cross-sectional shape of longitudinal steel 1;

[0119] Step E, welding longitudinal steel skeleton 1 and transverse steel connecting member 10 and transverse connecting steel plate 1.3 into one body

[0120] Step F, welding or bolting longitudinal steel skeleton 1 and flange restraint member 3 into one body;

[0121] Step G, welding longitudinal steel skeleton and steel shear member into one body;

[0122] Step two, constructing longitudinal steel skeleton 1, fixing after horizontal and vertical calibration and positioning;

[0123] Step three, constructing structural beam B, connecting with longitudinal steel skeleton 1 after horizontal and vertical calibration and positioning;

[0124] Step four, binding external reinforcement 4;

[0125] Step five, setting up formwork of structural column A;

[0126] Step six, pouring concrete 2, curing to predetermined strength.

[0127] The above description is merely preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical range disclosed by the present application should be covered within the protection scope of the present application.

Claims

1. A structure of a connection joint between a steel-reinforced concrete column and a beam, comprising a structural column (A) and a structural beam (B), characterized in that: The structure column (A) comprises a longitudinal steel skeleton (1), concrete (2), external reinforcement (4), shear element (8), flange restraint element (3); the longitudinal steel skeleton (1) comprises steel skeleton web (1.1) and steel skeleton flange (1.2), and the steel skeleton web (1.1) and the steel skeleton flange (1.2) are fixedly connected; the concrete (2) comprises inner concrete (2.1) and outer concrete (2.2); the external reinforcement (4) comprises outer vertical reinforcement (4.1) and outer horizontal reinforcement (4.2); the outer vertical reinforcement (4.1) and the outer horizontal reinforcement (4.2) are steel bars and / or FRP bars; the outer vertical reinforcement (4.1) is fixedly connected or discontinuously connected along the vertical direction outside the concrete (2); the longitudinal steel skeleton (1) is vertically and lengthwise arranged in the concrete (2); the shear element (8) is arranged at intervals along the longitudinal steel skeleton (1) and is fixedly connected with the longitudinal steel skeleton (1); the flange restraint element (3) is arranged at intervals along the end of the steel skeleton flange (1.2), and the two ends are fixedly connected with the adjacent steel skeleton flanges (1.2) respectively; the steel skeleton flange (1.2) and the flange restraint element (3) surround the inner concrete (2.1) and form a constraint on the inner concrete (2.1); the external reinforcement (4) is located outside the longitudinal steel skeleton (1) and the flange restraint element (3); the outer vertical reinforcement (4.1) is arranged at intervals along the circumferential direction outside the longitudinal steel skeleton (1); the outer horizontal reinforcement (4.2) is arranged at intervals along the vertical direction outside the outer vertical reinforcement (4.1) and forms a reinforced mesh or a reinforced cage together with the outer vertical reinforcement (4.1); the external reinforcement (4) forms an outer reinforced concrete layer together with the outer concrete (2.2) and wraps the longitudinal steel skeleton (1) along the horizontal direction; a horizontal transverse steel connecting element (10) is arranged at the position corresponding to the structure beam (B), the transverse steel connecting element (10) comprises a transverse steel connecting element flange (10.2) and a transverse steel connecting element web (10.1); the transverse steel connecting element (10) is located outside the steel skeleton flange (1.2) and is fixedly connected with the steel skeleton flange (1.2); the steel skeleton flange (1.2) has a transverse connecting steel plate (1.3) inside, the position of the transverse connecting steel plate (1.3) corresponds to the arrangement of the transverse steel connecting element flange (10.2) and is fixedly connected with the longitudinal steel skeleton (1); the transverse steel connecting element flange (10.2) is lower than the top of the longitudinal steel skeleton (1); the structure beam (B) is connected with the longitudinal steel skeleton (1) as a whole; the distance between the steel skeleton flange (1.2) and the outer edge of the column concrete is less than 200 mm.

2. The steel reinforced concrete column-to-beam connection structure according to claim 1, characterized by: The flange restraint element (3) is a steel bar and / or a steel plate, and the flange restraint element (3) is welded or bolted to the steel skeleton flange (1.2).

3. The steel reinforced concrete column-to-beam connection structure according to claim 1, characterized by: Adjacent steel skeleton flanges (1.2) are arranged at intervals at the ends of the flange additional restraint elements (11), the steel skeleton flanges (1.2) are fixedly connected with the flange additional restraint elements (11), and the additional restraint surrounds the concrete (2).

4. The steel reinforced concrete column-to-beam connection structure according to claim 1, characterized by: Inner steel bars (6) are arranged at intervals on the side edges of each group of flange restraint elements (3) and / or flange additional restraint elements (11).

5. The steel reinforced concrete column-to-beam connection structure according to claim 1, wherein: Non-continuous steel bars (12) are arranged at the corresponding positions outside the steel wing (1.2); the non-continuous steel bars (12) are disconnected at the structure beam (B) to be installed.

6. The steel reinforced concrete column-to-beam connection structure according to claim 1, characterized by: The longitudinal steel bars (1) of the upper steel-reinforced concrete column are fixedly connected with the longitudinal steel bars (1) of the lower steel-reinforced concrete column, and the steel wing (1.2) and the steel web (1.1) are arranged correspondingly. The outer vertical bars (4.1) of the upper steel-reinforced concrete column are fixedly connected with the outer vertical bars (4.1) of the lower steel-reinforced concrete column.

7. The steel reinforced concrete column-to-beam connection structure according to claim 1, wherein: The structure beam (B) is a prefabricated concrete beam or a steel beam or a steel-reinforced concrete beam; the longitudinal steel bars (1) and the structure beam (B) are connected by welding or bolting or a combination of bolting and welding.

8. The steel reinforced concrete column-to-beam connection structure according to any one of claims 1 to 7, characterized by The axial compression bearing capacity checking method of the structure column (A) comprises the following specific steps: Step 1, determining the size of the steel or steel plate of the longitudinal steel bars (1), the steel strength parameters, the diameter of the fixedly connected outer vertical bars (4.1), the strength parameters of the outer vertical bars (4.1), the column section size, the concrete strength parameters, the interval distance, size and strength parameters of the wing restraint (3); Step 2, calculating the axial compression force of the steel-reinforced concrete column under different load conditions, and combining to obtain the maximum axial compression force; Step 3, calculating the axial compression bearing capacity of the steel-reinforced concrete column; the calculation can be performed according to the following formula or detailed calculation according to the existing design specification: N= φψ ( f a A a + α 1 f c A c +ξη α 1 f c A c ) η=μζ ζ= f a A a / f c A c In the formula: N is the design value of the axial compression force of the steel-reinforced concrete column; φ - stability factor of steel-reinforced concrete columns; ψ - reduction factor for column axial load bearing capacity; ξ is the reduction coefficient of the concrete constraint effect; η is the concrete constraint effect coefficient; μ is the equivalent cavity influence coefficient; ζ is the equivalent sleeve index; A a - the sum of the continuous steel skeleton section areas (mm2); A c - the sum of the net cross-sectional areas of the concrete (mm2); α 1 - coefficient of influence of concrete compressive stress in the compression zone; f c - Design value of axial compressive strength of concrete (MPa); f a - Design value of compressive and tensile strength (MPa) of the steel plate of the continuous steel skeleton; The strength parameters in the formula are obtained according to the existing national standard or through experiments, and the geometric parameters are obtained according to the actual size or nominal size, and steps 1-3 are repeated, the internal force and deformation of the steel-reinforced concrete column are calculated, the axial compression bearing capacity is compared with the maximum axial compression force calculated according to the actual working condition load of the structure, and the larger one is the maximum axial compression force.

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