CN105239668B - A kind of internal partition formula concrete filled steel tube switching node structure and its construction method - Google Patents

Abstract

The invention discloses an inner diaphragm type concrete-filled steel pipe transfer node structure and a construction method thereof, wherein an inner diaphragm type steel pipe concrete transfer node structure includes a pillar, a slanted column and a socket for connecting the slanted column to the pillar There is a section on the inclined column, and the section includes a cross section. The receiving frame is fixedly arranged inside the pillar and is located at the top of the pillar. The receiving frame includes a lower inner partition and a vertical inner rib, and the vertical inner rib is fixed on the On the lower inner partition, the shape of the vertical inner rib corresponds to the cross-sectional shape of the oblique column, and the oblique column is fixed to the vertical inner rib through the section. The invention combines the advantages of the steel pipe concrete and inclined column conversion structure, and has the advantages of direct force transmission, high bearing capacity, small component cross-sectional size, favorable use of building space, no need for formwork, less on-site welding workload, and guaranteed construction quality, etc. advantage. The two slanted columns and the beam system constitute a triangular force transmission mode, and have good resistance to lateral forces.

Description

An inner diaphragm type concrete filled steel pipe transfer node structure and its construction method

technical field

The invention relates to a building transfer node structure and a construction method thereof, in particular to an inner partition type steel pipe concrete transfer node structure and a construction method thereof.

Background technique

As the functions and forms of high-rise and super high-rise buildings continue to diversify, the application of transfer floors is becoming more and more extensive. The inclined column transfer structure has transfer members, which mainly bear the axial load, has the characteristics of short force transmission path and small cross-sectional size of the transfer members, which is beneficial to the use of architectural space, so it has a wide application prospect. In addition, because the transition member mainly bears axial load, it is suitable to adopt the CFST member. The size of steel pipe concrete members is smaller than that of traditional reinforced concrete members, and it saves formwork and does not need to bind steel bars. The construction progress is fast and the construction quality is guaranteed. When both the slanted column and the pillar of the slanted column transfer structure are made of steel tube concrete, it is called the steel tube concrete slanted column transfer structure. As an important part of the CFST slanted column transfer structure, the joints have few research results on their mechanical properties and construction methods, which have become a bottleneck restricting the application of the CFST slanted column transfer structure.

According to the different types of transfer components, the existing slanted column transfer structural nodes are mainly divided into three types: reinforced concrete slanted column transfer nodes, steel concrete slanted column transfer nodes, and steel tube concrete slanted column transfer nodes.

1. The conversion member is a slanted column conversion node of a reinforced concrete member

The inclined columns and pillars are all reinforced concrete components, and the steel bars of the inclined columns, pillars, and floor beams meet at the nodes, and the concrete in the node areas is formed by one-time pouring. The internal force of inclined columns and floor beams is directly transmitted to the node area through steel bars and concrete, and then to the pillars, so the integrity of the nodes is good. However, there are deficiencies in practical applications, mainly:

(1) The cross-sectional size of the component is large, which affects the use of building space. The slanted column in the slanted column conversion structure bears the load from the superstructure, and the internal force is relatively large, and the larger the inclination angle with the vertical direction, the greater the internal force of the slanted column. The bearing capacity of reinforced concrete members is low. In order to meet the safety requirements, the cross-sectional size of the slanted columns and the volume of the joints are both large, which will reduce the use of space in the transfer floor building and inconvenience the passage of pipelines.

(2) Node construction is difficult. Although the integrity of the reinforced concrete slanted column transfer joint is good, the steel bars of multiple slanted columns, pillars, and floor beams are gathered and anchored in the joint area, and the joint area is densely populated and difficult to bind, making it difficult to guarantee the construction quality. The joint area is large in volume, and it is difficult to ensure the compactness of concrete pouring and tamping. Moreover, the heat of hydration is high and the temperature stress is large during pouring, which is not good for crack control. In addition, the concrete structure construction process requires formwork work, and the construction period is long.

2. Converting members to inclined column conversion nodes of steel concrete members

The slanted columns and pillars are all shaped steel concrete components. The steel bars and shaped steel of the slanted columns, pillars, and floor beams meet at the nodes, and the concrete in the node areas is formed by one-time pouring. The internal force of inclined columns and floor beams is directly transmitted to the node area through steel, steel bars and concrete, and then to the pillars, and the integrity of the nodes is good.

The transfer members of this type of joints are made of reinforced concrete, and the section is smaller than that of reinforced concrete members, which is beneficial to the use of building space. However, there are many slanted columns, section steel and steel bars of the pillars, and steel bars of the floor beams gathered at the joints. The joint area is densely populated and difficult to bind. The construction is difficult and the quality is difficult to guarantee.

3. The conversion member is the inclined column conversion node of the steel tube concrete member

The inclined columns and pillars are all made of steel pipe concrete, and the floor beams are generally made of steel beams or steel concrete beams. The vertical load is transmitted through the connection between the slanted column and the pillar, the bending moment at the beam end is transmitted through the inner diaphragm of the node or the outer reinforcing ring, and the shear force at the beam end is transmitted through the connection between the beam web and the column or the steel pipe of the slanted column. There are mainly two types of CFST slanted column transfer structures that have been applied in projects, each with its own advantages and disadvantages:

(1) Intersecting joints between slanted columns and pillars. Rectangular and circular cross-section concrete-filled steel tube columns can be used for inclined columns and pillars, respectively, and circular cross-section concrete-filled steel tube columns can also be used, and the requirements for the cross-sectional shape of components are relatively low. Openings are opened on the side of the pillars, and the inclined columns are connected to the pillars from the side of the pillars. The inner partition or outer ring plate is provided in the node area, and the floor beam is connected to the pillars in the node area or directly connected to the inclined columns. The concrete is poured and tamped in one step or in sections.

The openings on the side of the pillar weaken the cross-section of the pillar and complicate the stress distribution in the intersecting area. The internal force of the slanted column is dominated by the axial force. When the internal force is transmitted to the pillar from the side, the horizontal shear component and the vertical shear component of the intersecting interface between the pillar and the slanted column will be generated. The horizontal shear component is borne by the shear bearing capacity of the pillar section or the inner diaphragm in the node area, and the vertical shear component is borne by the concrete shear strength of the steel pipe weld and intersecting interface. The force transmission path is relatively clear, but There are many force transmission units, resulting in complex stress distribution in the joint area, and it is easy to form a weak section. The floor beams on the same plane as the slanted columns can only be connected to the slanted columns and cannot be directly connected to the columns, which will further cause unclear force transmission in the joint area. If the joint area is connected to floor beams in different directions through the outer ring plate, the range of the joint area will be greatly increased, which will affect the appearance and use of the building.

(2) Slanted columns and butt joints of pillars. This type of connection is only applicable to the case where both the slanted column and the pillar adopt the rectangular cross-section concrete-filled steel tube column, and generally only connects 2 slanted columns. The cross-sectional area of the pillar is equal to the total cross-sectional area of the bottom of the intersection of the two inclined columns. The lower end of the inclined column is butt-welded with the steel plates on each side of the pillar. Inner partitions or outer ring slabs are provided in the node area, floor beams are connected to pillars in the node area, and the concrete for inclined columns, nodes, and pillars is poured and tamped in one step or in sections. The internal force of the inclined column is directly transmitted through the butt joint steel pipe and concrete, and the transmission mode of the internal force of the beam end of the floor beam is the same as that of the ordinary concrete filled steel pipe joint.

This type of node ensures the integrity of the pillar, and the force transmission path is simple and clear. However, when this connection method is used, only rectangular steel pipe concrete members can be used, and the rectangular steel pipe has a poor restraint effect on the core concrete, and the economic benefit is low.

Contents of the invention

Aiming at the technical problems existing in the prior art, the purpose of the present invention is to provide an inner diaphragm type concrete filled steel pipe transfer node structure.

Another object of the present invention is to provide a construction method for an inner diaphragm type concrete filled steel pipe transfer node.

The purpose of the present invention is achieved through the following technical proposals: a kind of inner diaphragm type concrete filled steel tube transition node structure, including pillars, inclined columns and a receiving frame for connecting the inclined columns to the pillars, the inclined columns have a section, and the section includes Cross-section, the receiving frame is fixed inside the pillar and is located at the top of the pillar, the receiving frame includes a lower inner partition and a vertical inner rib, and the vertical inner rib is fixed on the lower inner partition, wherein the vertical inner The shape of the rib corresponds to the cross-sectional shape of the slanted column, and the slanted column is fixed to the vertical inner floor through the section.

Preferably, the receiving frame is also provided with a protruding vertical inner rib on the upper part protruding from the pillar, and the section also includes a vertical section, the protruding vertical inner rib is fixed on the lower inner partition, and the vertical inner rib The shape corresponds to the shape of the cross section and the cross section is fixed on the vertical inner rib, and the vertical section is fixedly connected with the protruding vertical inner rib.

Preferably, the receiving frame is also provided with an upper inner partition, the middle part of the upper inner partition is provided with a connection port, the connection port is fixedly connected to the outer wall surface of the top of the vertical inner rib, and the outer edge of the upper inner partition is fixedly connected to the top of the pillar. On the inner wall of the nozzle, the lower inner partition is provided with a first pouring hole, the bottom of the vertical inner rib is fixedly connected to the lower inner partition, and the outer edge of the lower inner partition is fixedly connected to the inner wall of the pillar;

It also includes an upper outer reinforcing ring and a lower outer reinforcing ring, and the upper outer reinforcing ring and the lower outer reinforcing ring are fixedly connected to the outer wall surface of the pillar corresponding to the positions of the upper inner partition and the lower inner partition respectively.

Preferably, a plurality of first ventilation holes are uniformly opened on the lower inner partition, and the plurality of first ventilation holes are respectively arranged around the first pouring holes; the upper inner partition is provided with second irrigation holes and A plurality of second ventilation holes uniformly arranged around the second irrigation hole.

Preferably, a rib is provided between the upper outer reinforcing ring and the lower outer reinforcing ring, and the edges of the rib are respectively fixed on the upper outer reinforcing ring, the outer wall surface of the pillar and the lower outer reinforcing ring.

Preferably, the slanted columns are two rectangular slanted columns, the cross sections of the two slanted columns enclose a rectangular section, the vertical section of the slanted columns includes two vertical sections and an upper longitudinal section, and the vertical inner ribs A rectangular joint is formed, the protruding vertical inner rib is set in the middle of the rectangular joint, the rectangular section is fixedly connected to the rectangular joint, and the vertical section and upper longitudinal section of the two oblique columns are fixed on the protruding vertical inner rib on both sides of the board.

Preferably, the slanted columns are two circular slanted columns, the cross-section of the slanted columns is an arc-shaped cross-section, the cross-sections of the two slanted columns form an arc-shaped section, and the vertical section of the slanted columns is an arc-shaped vertical The vertical inner ribs form an arc joint, the protruding vertical inner ribs are arranged in the middle of the arc joint, the arc cross-section is fixedly connected to the arc joint, and the two inclined columns The arc-shaped vertical section is respectively fixedly connected to the two sides of the protruding vertical inner rib.

Preferably, a reinforcing rib is obliquely arranged in the nozzle at the lower end of the inclined column, and a third pouring hole is opened on the reinforcing rib.

A construction method for an inner diaphragm type concrete-filled steel pipe conversion node, which cuts the nozzle of the inclined column to be connected, and cuts out a cross section and a vertical section respectively;

Make the vertical inner ribs into the same shape as the cross-section of the inclined column, then set the protruding vertical inner ribs in the middle of the shape surrounded by the vertical inner ribs, and place the bottom of the protruding vertical inner ribs and the vertical inner ribs The bottom of the plate is welded to the lower inner partition, and the outer edge of the lower inner partition is welded to the inner wall surface of the pillar, and the lower inner partition has a first pouring hole, and the upper part of the protruding vertical inner rib protrudes from the pillar outside;

Butt the pillar with the lower CFST column, and pour concrete to the node area;

Hoist the inclined column in place and weld the cross section and vertical section to the vertical inner floor and the protruding vertical inner floor respectively;

After the concrete of the node area and the pillar is solidified, pour the concrete of the inclined column.

Preferably, before the pillar is connected with the lower concrete-filled steel tube column, an upper inner partition is arranged at the nozzle of the pillar, the outer edge of the upper inner partition is welded to the inner wall surface of the nozzle of the pillar, and the middle part of the upper inner partition has a connection port. The edge of the connection port is welded to the outer wall surface of the top of the vertical inner rib, and a second pouring hole is opened on the upper inner partition;

It also includes an upper outer reinforcing ring and a lower outer reinforcing ring, and the upper outer reinforcing ring and the lower outer reinforcing ring are welded to the outer wall surface of the pillar corresponding to the positions of the upper inner partition and the lower inner partition respectively.

Compared with the prior art, the present invention has the following advantages and effects:

1. The present invention combines the advantages of steel pipe concrete and inclined column conversion structure, and has the advantages of direct force transmission, high bearing capacity, small component cross-sectional size, favorable utilization of building space, no need for formwork, less on-site welding workload, and excellent construction quality. Guarantee etc. The two slanted columns and the beam system constitute a triangular force transmission mode, and have good resistance to lateral forces.

2. The present invention can realize the connection of oblique columns with rectangular cross-sections and pillars with circular cross-sections. The upper structure adopts oblique columns with rectangular cross section, which does not affect the building use space. The substructure adopts circular cross-section pillars, and the steel pipes have a strong restraint effect on the core concrete, effectively improving the bearing capacity and seismic performance of the pillars. In addition, the column spacing of the substructure is usually relatively large, and the use of circular cross-section columns has less adverse effects on the building space.

3. The present invention can realize the connection of the oblique column with circular section and the column with circular section. The invention adopts a circular cross-section pillar, and the steel pipe has a large restraining effect on the core concrete, thereby effectively improving the bearing capacity and anti-seismic performance of the pillar.

4. The present invention has few force transmission units and clear force transmission, which solves the problem of many force transmission units and unclear force transmission at the conversion nodes of intersecting rectangular or circular cross-section oblique columns and circular cross-section pillars. The slanted column and the pillar of the present invention adopt plug-in connection, the bending moment of the slanted column end and the beam end is transmitted through the upper inner partition, the lower inner partition, the upper outer reinforcing ring and the lower outer reinforcing ring, and the vertical internal force of the slanting column passes through the lower inner Diaphragms and concrete transmit localized pressure to the columns.

5. Protruding vertical internal ribs are provided in the intersecting area of inclined columns, which can improve the bearing capacity of the intersecting areas of inclined columns, effectively transmit the internal force of inclined column ends, and do not affect the pouring and tamping of concrete.

6. Vertical inner ribs and protruding vertical inner ribs are set in the joint area, which enhances the confinement of the concrete in the joint area, which is conducive to improving the compressive strength of the concrete in the core area and making the joint area more rigid.

7. The upper inner partition and the lower inner partition are set in the joint area to make the joint integrity good and the bending rigidity large.

8. By setting ribs, upper outer reinforcing ring and lower outer reinforcing ring, the stiffness of the joints is increased, and the joints can be connected with floor beams in any direction. The layout of the beams is flexible and easy to meet the requirements of building functions.

Description of drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a sectional view of A-A in Fig. 1 .

Fig. 3 is a sectional view of B-B in Fig. 2 .

Fig. 4 is a sectional view of C-C in Fig. 2 .

Fig. 5 is an exploded view of the receiving frame according to the first embodiment of the present invention.

Fig. 6 is a schematic diagram of the receiving frame according to Embodiment 1 of the present invention.

Fig. 7 is a schematic diagram of the installation relationship between the upper outer reinforcing ring, the connecting ribs, the lower outer reinforcing ring, the lower inner partition and the pillars in Embodiment 1 of the present invention.

Fig. 8 is a schematic diagram of the installation relationship between the reinforcing ribs and the slanting columns in Embodiment 1 of the present invention.

Fig. 9 is a schematic diagram of the installation relationship between the upper inner partition and the receiving frame of the first embodiment of the present invention and the pillars equipped with the upper outer reinforcement ring, connecting ribs, lower outer reinforcement ring, and lower inner partition.

Fig. 10 is a schematic diagram of pouring concrete into the pillar after installing the receiving frame according to the first embodiment of the present invention into the pillar.

Fig. 11 is a schematic diagram of the installation relationship between the slanted column with the reinforcing rib plate and the receiving frame according to Embodiment 1 of the present invention.

Fig. 12 is a schematic diagram of pouring concrete in the inclined column after the inclined column is installed on the receiving frame according to the first embodiment of the present invention.

Fig. 13 is an exploded view of the receiving frame according to the second embodiment of the present invention.

Fig. 14 is a schematic diagram of the receiving frame according to the second embodiment of the present invention.

Fig. 15 is a schematic diagram of the installation relationship between the upper outer reinforcing ring, the connecting ribs, the lower outer reinforcing ring, the lower inner partition and the pillars according to the second embodiment of the present invention.

Fig. 16 is a schematic diagram of the installation relationship between the reinforcing ribs and the inclined columns according to the second embodiment of the present invention.

Figure 17 is a schematic diagram of the installation relationship between the upper inner partition and the receiving frame of the second embodiment of the present invention and the pillars equipped with the upper outer reinforcement ring, connecting ribs, lower outer reinforcement ring, and lower inner partition.

Fig. 18 is a schematic diagram of pouring concrete into the pillar after installing the receiving frame according to the second embodiment of the present invention into the pillar.

Fig. 19 is a schematic diagram of the installation relationship between the slanted column with the reinforcing rib plate and the receiving frame according to the second embodiment of the present invention.

Fig. 20 is a schematic diagram of pouring concrete in the inclined column after the inclined column is installed on the receiving frame according to the second embodiment of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Embodiment one:

An inner diaphragm type concrete-filled steel tube transfer node structure, including a pillar 1, a slanting column 2, and a receiving frame 3 for connecting the slanting column to the pillar. The slanting column has a section, and the section includes a cross section 7. The receiving frame Fixedly arranged inside the pillar and located at the top of the pillar, the receiving frame includes a lower inner partition 4 and a vertical inner rib 5, and the vertical inner rib is fixed on the lower inner partition, wherein the shape of the vertical inner rib is consistent with the inclined The shape of the cross-section of the column is corresponding, and the oblique column is fixed to the vertical inner floor through the cross-section.

Preferably, the receiving frame is also provided with a protruding vertical inner rib 6 protruding from the outside of the pillar, and the section also includes a vertical section 8, the protruding vertical inner rib is fixed on the lower inner partition, and the vertical inner The shape of the rib corresponds to the shape of the cross section and the cross section is fixed on the vertical inner rib, and the vertical section is fixedly connected with the protruding vertical inner rib.

Preferably, the receiving frame is also provided with an upper inner partition 9, the middle part of the upper inner partition is provided with a connection port 10, the connection port is fixedly connected to the outer wall surface of the top of the vertical inner rib, and the outer edge of the upper inner partition is fixedly connected to On the inner wall of the nozzle of the pillar, the lower inner partition is provided with a first pouring hole 11, the bottom of the vertical inner rib is fixedly connected to the lower inner partition, and the outer edge of the lower inner partition is fixedly connected to the inner wall of the pillar ;

It also includes an upper outer reinforcing ring 12 and a lower outer reinforcing ring 13, the upper outer reinforcing ring and the lower outer reinforcing ring are fixedly connected to the outer wall surface of the pillar corresponding to the positions of the upper inner partition and the lower inner partition respectively.

Preferably, a plurality of first ventilation holes are uniformly opened on the lower inner partition, and the plurality of first ventilation holes are respectively arranged around the first pouring holes; second irrigation holes 24 are opened on the upper inner partition And a plurality of second vent holes evenly arranged around the second pouring hole, setting the first vent hole can facilitate the discharge of gas when pouring concrete through the first pouring hole, and completely fill the inside of the pillar with concrete, so as to avoid the occurrence of air insufficiency. The phenomenon that the concrete pouring is not in place due to discharge, such as: there is still a vacancy at the position below the lower inner partition after the concrete is poured. Similarly, setting the second ventilation hole is also to achieve the above-mentioned similar effect, which will not be described here. .

Preferably, a rib 14 is arranged between the upper outer reinforcing ring and the lower outer reinforcing ring, and the edges of the rib are respectively fixed on the upper outer reinforcing ring, the outer wall surface of the pillar and the lower outer reinforcing ring. The number of ribs can be 4, and can be conveniently connected with the floor beam 17 in any direction through the ribs, the upper outer reinforcing ring and the lower outer reinforcing ring.

Preferably, a reinforcing rib 15 is obliquely arranged in the nozzle at the lower end of the inclined column, and a third pouring hole is opened on the reinforcing rib. The benefit of setting the third pouring hole is to facilitate the flow of concrete.

Preferably, the slanted columns are two rectangular slanted columns, the cross sections of the two slanted columns form a rectangular section, the vertical section of the slanted column includes two vertical sections 18 and an upper longitudinal section 19, the vertical inner The ribs form a rectangular joint 16, the protruding vertical inner ribs are arranged in the middle of the rectangular joint, the rectangular section is fixedly connected to the rectangular joint, the vertical section and the upper longitudinal section of the two oblique columns are fixed on the protruding On both sides of the vertical inner ribs. The cross section of the oblique column includes two cross sections 20 and a lower longitudinal section 22 .

Preferably, the vertical inner ribs include a plurality of vertical inner ribs, and a "day"-shaped structure is formed between the plurality of vertical inner ribs and the protruding vertical inner ribs, and the protruding vertical inner ribs are located in the middle.

Preferably, the upper part of the reinforcing rib is fixedly connected to the inner side of the upper longitudinal section, the lower part of the reinforcing rib is fixedly connected to the inner side of the lower longitudinal section, and the left and right sides of the reinforcing rib are respectively fixedly connected to the inner wall of the inclined column.

Embodiment two:

The difference between this embodiment and the first embodiment is that the slanted columns are two circular slanted columns 21, the cross section of the slanted columns is an arc-shaped cross section, and the cross section of the two slanted columns forms an arc section , the vertical section of the inclined column is an arc-shaped vertical section, the vertical inner ribs enclose an arc joint 161, the protruding vertical inner ribs are arranged in the middle of the arc joint, and the arc cross-sections are fixedly connected On the arc joint, the arc vertical sections of the two oblique columns are respectively fixedly connected to the two sides of the protruding vertical inner ribs. The vertical inner ribs can be two arc-shaped vertical inner ribs 51, and the openings of the two arc-shaped vertical inner ribs are respectively fixedly connected with the protruding vertical inner ribs.

Embodiment three:

A construction method for an inner diaphragm type concrete-filled steel pipe conversion node, which cuts the nozzle of the inclined column to be connected, and cuts out a cross section and a vertical section respectively;

Make the vertical inner ribs into the same shape as the cross-section of the inclined column, then set the protruding vertical inner ribs in the middle of the shape surrounded by the vertical inner ribs, and place the bottom of the protruding vertical inner ribs and the vertical inner ribs The bottom of the plate is welded to the lower inner partition, and the outer edge of the lower inner partition is welded to the inner wall surface of the pillar, and the lower inner partition has a first pouring hole, and the upper part of the protruding vertical inner rib protrudes from the pillar outside;

Butt the pillar with the lower CFST column, and pour concrete to the node area;

Hoist the inclined column in place and weld the cross-section and vertical section to the vertical inner ribs and protruding vertical inner ribs respectively;

After the concrete of the node area and the pillar is solidified, pour the concrete of the inclined column.

Preferably, before the pillar is connected with the lower concrete-filled steel tube column, an upper inner partition is arranged at the nozzle of the pillar, the outer edge of the upper inner partition is welded to the inner wall surface of the nozzle of the pillar, and the middle part of the upper inner partition has a connection port. The edge of the connection port is welded to the outer wall surface of the top of the vertical inner rib, and a second pouring hole is opened on the upper inner partition;

It also includes an upper outer reinforcing ring and a lower outer reinforcing ring, and the upper outer reinforcing ring and the lower outer reinforcing ring are welded to the outer wall surface of the pillar corresponding to the positions of the upper inner partition and the lower inner partition respectively.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (10)

1. an inner clapboard type concrete-filled-steel conversion node structure, is characterized in that: comprise pillar, inclined column and be used for the receiving frame that inclined column is connected on the pillar, there is section on the inclined column, and section comprises cross section, described The receiving frame is fixed inside the pillar and is located at the top of the pillar. The receiving frame includes a lower inner partition and a vertical inner rib, and the vertical inner rib is fixed on the lower inner partition. The shape of the cross-section of the column is corresponding, and the oblique column is fixed to the vertical inner floor through the cross-section. 2. The inner diaphragm type concrete-filled steel tube transfer node structure according to claim 1, characterized in that: the receiving frame is also provided with a protruding vertical inner rib plate whose upper part protrudes from the pillar, and the section also includes a vertical rib Section, the protruding vertical inner ribs are fixed on the lower inner partition, the shape of the vertical inner ribs corresponds to the shape of the cross section and the cross section is fixed on the vertical inner ribs, and the vertical section is fixedly connected with the protruding vertical inner ribs . 3. The inner diaphragm-type concrete-filled steel tube conversion node structure according to claim 1, characterized in that: the receiving frame is also provided with an upper inner diaphragm, and a connection port is opened in the middle of the upper inner diaphragm, and the connection port is fixedly connected to On the outer wall of the top of the vertical inner rib, the outer edge of the upper inner partition is fixedly connected to the inner wall of the nozzle of the pillar, the first pouring hole is opened on the lower inner partition, and the bottom of the vertical inner rib is fixedly connected to the lower inner partition On the plate, the outer edge of the lower inner partition is fixedly connected to the inner wall of the pillar; It also includes an upper outer reinforcing ring and a lower outer reinforcing ring, and the upper outer reinforcing ring and the lower outer reinforcing ring are fixedly connected to the outer wall surface of the pillar corresponding to the positions of the upper inner partition and the lower inner partition respectively. 4. The inner diaphragm type concrete-filled steel tube conversion node structure according to claim 3, characterized in that: the lower inner diaphragm is evenly opened with a plurality of first ventilation holes, and the plurality of first ventilation holes respectively surround The first pouring hole is provided; the upper inner partition is provided with a second pouring hole and a plurality of second ventilation holes uniformly arranged around the second pouring hole. 5. The inner diaphragm type concrete-filled steel tube conversion node structure according to claim 3, characterized in that: ribs are arranged between the upper outer reinforcement ring and the lower outer reinforcement ring, and the edges of the ribs are respectively fixed on the upper outer reinforcement Ring, the outer wall of the pillar and the lower outer reinforcing ring. 6. The inner clapboard type concrete-filled steel tube transfer node structure according to claim 2, characterized in that: the slanted columns are two and are rectangular slanted columns, the cross sections of the two slanted columns form a rectangular section, and the slanted columns The vertical section of the vertical section includes two vertical sections and an upper longitudinal section. The vertical inner ribs surround a rectangular joint, the protruding vertical inner ribs are arranged in the middle of the rectangular joint, and the rectangular section is fixedly connected to the rectangular joint. On the surface, the vertical section and the upper longitudinal section of the two oblique columns are fixed on the two sides of the protruding vertical inner ribs. 7. The inner clapboard-type concrete-filled steel tube conversion node structure according to claim 2, characterized in that: the slanted columns are two circular slanted columns, the cross-section of the slanted columns is an arc-shaped cross-section, and the two slanted columns The cross section of the column forms an arc section, the vertical section of the oblique column forms an arc section, the vertical inner ribs enclose an arc joint, and the protruding vertical inner ribs are arranged on the arc joint In the middle part, the arc-shaped cross-section is fixedly connected to the arc-shaped joint surface, and the arc-shaped vertical sections of the two oblique columns are respectively fixedly connected to the two sides of the protruding vertical inner ribs. 8. The inner diaphragm type concrete filled steel pipe transfer node structure according to claim 1, characterized in that: a reinforcement rib is obliquely arranged in the nozzle at the lower end of the inclined column, and a third pouring hole is opened on the reinforcement rib. 9. A construction method for an inner diaphragm type concrete filled steel pipe transfer node, characterized in that: Cut the nozzle of the inclined column to be connected, and cut out the cross section and vertical section respectively; Make the vertical inner ribs into the same shape as the cross-section of the inclined column, then set the protruding vertical inner ribs in the middle of the shape surrounded by the vertical inner ribs, and place the bottom of the protruding vertical inner ribs and the vertical inner ribs The bottom of the plate is welded to the lower inner partition, and the outer edge of the lower inner partition is welded to the inner wall surface of the pillar, and the lower inner partition has a first pouring hole, and the upper part of the protruding vertical inner rib protrudes from the pillar outside; Butt the pillar with the lower CFST column, and pour concrete to the node area; Hoist the inclined column in place and weld the cross section and vertical section to the vertical inner floor and the protruding vertical inner floor respectively; After the concrete of the node area and the pillar is solidified, pour the concrete of the inclined column. 10. The construction method of inner diaphragm-type concrete-filled steel pipe conversion joint according to claim 9, characterized in that: before the butt joint of the pillar and the lower concrete-filled steel pipe column, an upper inner diaphragm is arranged at the nozzle of the pillar, and the upper inner diaphragm The outer edge of the plate is welded to the inner wall surface of the nozzle of the pillar, the middle part of the upper inner partition has a connection port, the edge of the connection port is welded to the outer wall surface of the top of the vertical inner rib, and a second pouring hole is opened on the upper inner partition; It also includes an upper outer reinforcing ring and a lower outer reinforcing ring, and the upper outer reinforcing ring and the lower outer reinforcing ring are welded to the outer wall surface of the pillar corresponding to the positions of the upper inner partition and the lower inner partition respectively.