CN106948497A - The connecting joint structure and construction method of circular steel tube concrete post and steel structure girder - Google Patents

Abstract

The invention discloses a connection node structure of a circular steel pipe concrete column and a steel structure beam and a construction method thereof, comprising: a circular steel column tube, a node adapter, a double-ended screw and a steel structure beam; Concrete is poured; the vertical square steel tube of the node adapter is set on the circular steel column tube, the vertical square steel tube is welded with an upper end cover and a lower end cover, and concrete is poured between the vertical square steel tube and the circular steel column tube. A plurality of double-ended screws horizontally run through both sides of the circular steel column tube and the vertical square steel pipe; the steel structure beam is welded with an end panel, and the end panel is fixedly connected to a pair of sides of the vertical square steel pipe through nuts and double-ended screws . The connection node structure of the circular steel pipe concrete column and the steel structure beam of the present invention has the advantages of simple structure, convenient construction and reliable mechanical performance. The construction method of the connection node structure of the circular steel pipe concrete column and the steel structure beam of the present invention is used for the construction of the connection node structure of the circular steel pipe concrete column and the steel structure beam of the present invention.

Description

Connection node structure and construction method of circular steel tube concrete column and steel structure beam

technical field

The invention belongs to the technical field of construction engineering, and in particular relates to a connection node structure between a circular steel pipe concrete column and a steel structure beam and a construction method for a connection node structure between a circular steel pipe concrete column and a steel structure beam.

Background technique

As a new building structure, the steel tube concrete structure has the advantages of high strength, good seismic performance and convenient construction, and is widely used in engineering practice. At present, because circular steel pipes have stronger constraints on the internal concrete than square steel pipes, they have higher bearing capacity and a wider range of applications. However, it is difficult to connect circular steel pipe concrete columns with steel structural beams. The design of the connecting nodes is relatively complicated, and the on-site construction has certain difficulties.

Contents of the invention

In order to solve the above problems, the present invention provides a connection node structure between a circular steel pipe concrete column and a steel structure beam, which has a simple structure, convenient construction, and reliable mechanical performance. The present invention also provides a construction method for the connection node structure of the circular steel pipe concrete column and the steel structure beam, which is used for the construction of the connection node structure of the circular steel pipe concrete column and the steel structure beam of the present invention.

In order to achieve the above object, the present invention adopts the following technical solutions to solve the problem.

A connection node structure between a circular steel pipe concrete column and a steel structure beam, comprising: a circular steel column tube, a node adapter, a double-ended screw, and a steel structure beam; the circular steel column tube is poured with concrete; the The outer wall of the node adapter is a vertical square steel pipe, and the vertical square steel pipe is set on the outer wall of the circular steel column pipe. The edge of the upper end of the vertical square steel pipe is welded with an upper end cover. The edge of the lower end of the vertical square steel pipe is welded with a lower end cover, and concrete is poured between the vertical square steel pipe and the circular steel column tube; multiple double-ended screws horizontally penetrate the circular steel column tube and the two sides of the vertical square steel pipe, the two ends of a plurality of double-ended screws protrude vertically from a pair of side surfaces of the vertical square steel pipe respectively; the two ends of the steel structure beam are welded with end panels , the end panel is correspondingly provided with a plurality of connecting holes corresponding to the double-ended screws, and the end panels are fixedly connected to a pair of side surfaces of the vertical square steel pipe through nuts and the double-ended screws respectively .

According to the connection node structure of the circular steel pipe concrete column and the steel structure beam of the present invention, the inner side of the circular steel column tube is hollow, and concrete can be poured inside it to form a concrete column with strong bending and torsion resistance; the node adapter The outer wall of the square steel pipe is a square steel pipe, and the outer surface of the square steel pipe is a plane, which is easier to connect with the steel structure beam, and the connection form is flexible and changeable. The upper end cap and the lower end cap at both ends of the steel pipe encapsulate the concrete, which can improve the bending and torsional strength of the joint adapter and prevent the joint adapter from bending and torsional deformation. The circular steel column tube and the vertical square steel tube adopt A plurality of double-ended screws are fixedly connected, which can be arranged in double rows and double rows. It is easy to install and disassemble, and the fixation is firm and reliable. The two ends of the steel structure beam are welded with end panels, and the end panels are fixedly connected to the node adapters through double-ended screws. In order to realize the connection between the steel structure beam and the circular steel pipe concrete column, the end panel can diversify the connection mode between the steel structure beam and the node adapter, and is also conducive to improving the connection strength. The connection node structure of the circular concrete-filled steel tube column and the steel structure beam of the present invention has simple structure, convenient construction, and reliable mechanical performance, and can realize the connection between the circular steel tube concrete column and various steel structure beams, and the connection mode is more flexible change, has a wide range of applications.

Preferably, the lower end cover and the upper end cover are welded to the circular steel column tube.

According to the connection node structure between the circular steel pipe concrete column and the steel structure beam of the present invention, the lower end cover and the upper end cover are welded on the outside of the circular steel column tube, which can prevent the joint between the node adapter and the circular steel column tube. Mutual vibration causes the double-headed screw nut to loosen, and also enhances the stability of the connection between the node adapter and the circular steel column tube.

Preferably, the end panel is rectangular, the size of the four edges of the end panel is larger than the cross-sectional size of the steel structure beam, and the end panel is welded to the side of the vertical square steel pipe.

According to the joint structure of the circular steel pipe concrete column and the steel structure beam of the present invention, the end panel is rectangular, and the size of the four edges is larger than the cross-sectional size of the steel structure beam, which can ensure that the end face of the steel structure beam is completely welded on the end panel , which improves the connection strength between the end panel and the steel structure beam, and the side of the end panel that is not welded to the steel structure beam is welded and fixedly connected with the square steel pipe, which can improve the stability of the connection between the steel structure beam and the node adapter, and prevent the The mutual vibration between the structural beam and the node adapter causes the double-ended screw nut to loosen.

Preferably, the steel structural beam is I-beam.

According to the connection node structure of the circular steel pipe concrete column and the steel structure beam, the I-beam can be used as the steel structure beam. The I-beam has good mechanical properties and is a commonly used profile with various specifications, which can be purchased according to actual needs.

Preferably, the width of the end panel is equal to or smaller than the width of the side of the vertical square steel pipe, and the upper edge and the lower end edge of the end panel are respectively located inside the upper edge and the lower end edge of the vertical square steel pipe. .

According to the connection node structure of the circular steel pipe concrete column and the steel structure beam, it can ensure that the peripheral edges of the end panels are completely welded on the side surfaces of the vertical square steel pipes, and the welding connection strength between the end panels and the vertical square steel pipes can be enhanced .

A construction method for the connection node structure of a circular concrete-filled steel pipe column and a steel structure beam, which is used for the construction of the connection node structure of a circular steel pipe concrete column and a steel structure beam of the present invention, comprising the following steps: Step 02: in the circular A plurality of pairs of aligned connection holes are opened on the side wall of the predetermined connection part of the steel column tube and the steel structure beam, and then concrete is poured into the circular steel column tube, and the concrete is poured in the circular steel column tube to a height of approximately lower than the position of the connection hole; step 04: Open the connection hole on the node adapter so that it corresponds to the position of the connection hole on the circular steel column tube, and then the node adapter is inserted into the circular on the steel column tube, and use the double-ended screw with the nut to fix the node adapter on the circular steel column tube, then weld the node adapter to the circular steel column tube, and finally connect the node adapter from the double-ended screw Unscrew the nuts; Step 06: Weld the end panels at both ends of the steel structure beam, and open connection holes on the end panels, so that the connection holes on the end panels are aligned with the connection holes on the side of the vertical square steel pipe First, use nuts to cooperate with the double-ended screws to connect the end panels on the two steel structure beams to the two sides of the vertical square steel pipe respectively, and then weld the end panels to the two sides of the vertical square steel pipe On; step 08: continue to pour concrete in the circular steel column tube, so that the concrete does not pass through the double-ended screw, and the construction is completed.

According to the construction method of the connection node structure of the circular steel pipe concrete column and the steel structure beam of the present invention, in step 04, firstly, on the two opposite sides of the vertical square steel pipe in the node adapter, a circular The corresponding connection hole of the steel column tube, set the vertical square steel tube on the outside of the circular steel column tube, pass the double-ended stud through the connection hole of the vertical square steel tube and the circular steel column tube, screw on the nut, and put the The vertical square steel pipe and the circular steel column pipe are initially fixed. Secondly, put the lower end cover on the outer side of the circular steel column tube, weld the lower end cover on the lower end surface of the vertical square steel tube and the outer surface of the circular steel column tube in turn, unscrew the nut from the double-ended screw rod, and put the The double-ended screw is extracted from the connecting hole. Finally, pour concrete into the circular steel column pipe to slightly lower than the lower connecting hole, pour concrete into the gap between the inner side of the vertical square steel pipe and the outer side of the circular steel column pipe to slightly lower than the lower connecting hole, and place the double-ended screw Extend into the connection hole of the lower layer and screw on the nuts, continue pouring concrete into the circular steel column tube until it is slightly lower than the connection hole of the upper layer, and continue pouring concrete into the gap between the inner side of the vertical square steel tube and the outer side of the circular steel column tube to Slightly lower than the upper connection hole, insert the double-ended screw into the upper connection hole and screw on the nut, and continue to pour concrete into the gap between the inner side of the vertical square steel pipe and the outer side of the circular steel column pipe to the upper part of the vertical square steel pipe. edge, set the upper end cover on the outside of the circular steel column tube, weld the upper end cover on the upper end surface of the vertical square steel tube and the outer wall of the circular steel column tube in turn, and continue to pour concrete into the circular steel column tube to the round The upper edge of the shaped steel column pipe to complete the construction.

Preferably, in step 04, a connection hole is opened on the side wall of the vertical square steel tube so that it corresponds to the position of the connection hole on the circular steel column tube, and then the lower end cover is welded and connected to the For the lower port of the vertical square steel pipe, after inserting the lower end cover and the vertical square steel pipe into the circular steel column pipe, the vertical square steel pipe is fixedly connected to the circular steel column pipe by using double-ended screws and nuts. , and then weld the lower end cover on the side wall of the circular steel column tube, then unscrew the nut from the double-ended screw, take out the double-ended screw, and then pour concrete into the vertical square steel pipe to make the concrete The pouring height is slightly lower than the height of the connecting hole, and then the double-ended screw is inserted into the connecting hole on the circular steel column tube and the vertical square steel pipe, and the two ends of each double-ended screw are Tighten the nuts, and then continue to pour concrete between the vertical square steel pipe and the circular steel column pipe until the upper port of the vertical square steel pipe, and after the concrete reaches a predetermined strength, insert the upper end cover into the circular steel column. Shaped steel column tube, first weld the upper end cover to the upper port of the vertical square steel tube, then weld the upper end cover to the circular steel column tube, and finally unscrew the nut from the double-ended screw .

According to the construction method of the connection node structure between the circular steel tube concrete column and the steel structure beam, concrete is poured into the gap between the inner side of the vertical square steel tube and the outer side of the circular steel column tube, which can enhance the resistance of the node adapter. Bending and torsion resistance, preventing joint adapters from bending and deforming under stress. During the process of pouring concrete, insert double-ended screws into the connection holes of different heights in batches from bottom to top, which can prevent double-ended screws when pouring concrete. Blocking the concrete, avoiding the uneven texture of the poured concrete column, and enhancing the reliability and bearing capacity of the concrete column.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the structural representation of an embodiment of the connection node structure of circular steel pipe concrete column and steel structure beam of the present invention;

Fig. 2 is the sectional structure schematic diagram at A-A place of Fig. 1;

Fig. 3 is a flow chart of the construction method of the connection node structure of the circular steel pipe concrete column and the steel structure beam of the present invention.

In Fig. 1 and Fig. 2: 1 round steel column pipe; 2 concrete; 3 node adapter; 301 vertical square steel pipe; 302 upper end cap; 303 lower end cap; panel; 6 nuts.

detailed description

Referring to Fig. 1 and Fig. 2, the embodiment of the first aspect of the present invention proposes a connection node structure between a circular steel pipe concrete column and a steel structure beam, including: a circular steel column tube 1, a node adapter 3, a double-head Screw rod 4 and steel structure beam 5; circular steel column tube 1 is poured with concrete 2; the outer wall of node adapter 3 is vertical square steel tube 301, and vertical square steel tube 301 is set on the outside of circular steel column tube 1 On the wall, the edge of the upper end of the vertical square steel pipe 301 is welded with an upper end cover 302, the edge of the lower end of the vertical square steel pipe 301 is welded with a lower end cover 303, and concrete is poured between the vertical square steel pipe 301 and the circular steel column pipe 1 2; a plurality of double-ended screws 4 horizontally penetrate both sides of the circular steel column tube 1 and the vertical square steel pipe 301, and the two ends of the plurality of double-ended screws 4 extend vertically from a pair of sides of the vertical square steel pipe 301 respectively. The two ends of the steel structure beam 5 are welded with end panels 501, and the end panels 501 are correspondingly provided with a plurality of connecting holes corresponding to the double-ended screws 4, and the end panels 501 are respectively fixedly connected to the On a pair of sides of vertical square steel pipe 301.

In the above embodiments, the inner side of the circular steel column tube 1 is hollow, and concrete 2 can be poured inside to form a concrete column with strong bending and torsion resistance; the outer wall of the node adapter 3 is a vertical square steel tube 301 , the outer surface of the vertical square steel pipe 301 is a plane, which is easier to connect with the steel structure beam 5, and the connection form is flexible and changeable. Concrete 2 is poured between the inner side of the vertical square steel pipe 301 and the outer side of the circular steel column pipe 1, through The upper end cap 302 and the lower end cap 303 welded on the two ends of the vertical square steel pipe 301 encapsulate the concrete 2, which can improve the bending and torsional strength of the node adapter 3, and prevent the node adapter 3 from bending and torsional deformation. The circular steel column tube 1 and the vertical square steel tube 301 are fixedly connected by multiple double-ended screws 4, which can be arranged in double rows and double columns. It is easy to install and disassemble, and the fixing is firm and reliable. Both ends of the steel structure beam 5 are welded with end panels 501, the end panel 501 is fixedly connected with the node adapter 3 through the double-ended screw 4, thereby realizing the connection between the steel structure beam 5 and the circular steel pipe concrete 2 column, and the end panel 501 can make the steel structure beam 5 and the node adapter 3 The diversification of connection methods is also conducive to improving the connection strength. The connection node structure of the circular concrete-filled steel tube column and the steel structure beam of the present invention has simple structure, convenient construction, and reliable mechanical performance, and can realize the connection between the circular steel tube concrete column and various steel structure beams, and the connection mode is more flexible change, has a wide range of applications.

Referring to FIG. 1 and FIG. 2 , according to an embodiment of the present invention, the lower end cover 303 and the upper end cover 302 are welded to the round steel column tube 1 .

In the above embodiment, the lower end cover 303 and the upper end cover 302 are welded on the outer side of the circular steel column tube 1, which can prevent double ends caused by the mutual vibration between the node adapter 3 and the circular steel column tube 1. When the screw rod 4 and the nut 6 become loose, the stability of the connection between the node adapter 3 and the circular steel column tube 1 is also enhanced.

Referring to Fig. 1 and Fig. 2, according to an embodiment of the present invention, the end panel 501 is rectangular, the size of the four edges of the end panel 501 is greater than the cross-sectional size of the steel structure beam 5, and the end panel 501 is connected to the vertical square steel pipe 301. Side solder connection.

In the above embodiment, the end panel 501 is rectangular, and the size of the four edges is greater than the cross-sectional size of the steel structure beam 5, which can ensure that the end face of the steel structure beam 5 is completely welded on the end panel 501, and improves the connection between the end panel 501 and the steel structure. The connection strength of the structural beam 5, one side of the unwelded steel structural beam 5 of the end panel 501 is welded and fixedly connected with the square steel pipe, which can improve the stability of the connection between the steel structural beam 5 and the node adapter 3, and prevent the The mutual vibration between 5 and node adapter 3 causes the double-ended screw 4 and nut 6 to loosen.

Referring to Fig. 1 and Fig. 2, according to an embodiment of the present invention, the steel structure beam 5 is I-beam.

In the above embodiments, I-beams can be used as the steel structure beam 5. I-beams have good mechanical properties and are commonly used profiles with various specifications, which can be purchased according to actual needs.

With reference to Fig. 1 and Fig. 2, according to an embodiment of the present invention, the width of end panel 501 is equal to or less than the width of the side of vertical square steel pipe 301, and the upper end edge and the lower end edge of end panel 501 are positioned at vertical square steel pipe 301 respectively. The inside of the top and bottom edges.

In the above embodiments, it can be ensured that the peripheral edges of the end panel 501 are completely welded to the side surfaces of the vertical square steel pipe 301 to enhance the welding connection strength between the end panel 501 and the vertical square steel pipe 301 .

Referring to Fig. 1 to Fig. 3, the embodiment of the second aspect of the present invention proposes a construction method for the connection node structure of a circular steel tube concrete column and a steel structure beam, including step 02: connecting the circular steel column tube 1 with the steel structure A plurality of pairs of aligned connection holes are opened on the side wall of the predetermined connection part of the beam 5, and then concrete 2 is poured into the circular steel column tube 1, and the concrete 2 is poured in the circular steel column tube 1 to a height slightly lower than the connecting hole. The position of the hole; Step 04: Open the connection hole on the node adapter 3 so that it corresponds to the position of the connection hole on the circular steel column tube 1, and then the node adapter 3 is inserted into the circular steel column tube 1 , and use the double-ended screw 4 to cooperate with the nut 6 to fix the node adapter 3 on the circular steel column tube 1, then weld the node adapter 3 to the circular steel column tube 1, and finally connect the node adapter 3 from the double-ended screw 4 and unscrew the nut 6; Step 06: Weld the end panel 501 at the two ends of the steel structure beam 5, and open a connection hole on the end panel 501, so that the connection hole on the end panel 501 and the side surface of the vertical square steel pipe 301 Align the connection holes one by one, first use the nut 6 to cooperate with the double-ended screw 4 to connect the end panels 501 on the two steel structure beams 5 to the two sides of the vertical square steel pipe 301 respectively, and then weld the end panels 501 to the On the two sides of the vertical square steel pipe 301; step 08: continue to pour concrete 2 in the circular steel column pipe 1, so that the concrete 2 is covered by the double-ended screw 4, and the construction is completed.

In step 04, at first, on the two opposite sides of the vertical square steel tube 301 in the node adapter 3, open connection holes corresponding to the circular steel column tube 1, and set the vertical square steel tube 301 on the circular On the outside of the shaped steel column tube 1, pass the connecting hole of the vertical square steel tube 301 and the circular steel column tube 1 with a double-ended screw rod 4, screw on the nut 6, and connect the vertical square steel tube 301 and the circular steel column tube 1 Initially fixed. Next, the lower end cover 303 is set on the outside of the circular steel column tube 1, the lower end cover 303 is welded on the lower end surface of the vertical square steel tube 301 and the outer surface of the circular steel column tube 1 in turn, and the nut 6 is connected from the double-ended Unscrew the screw 4, and pull out the double-ended screw 4 from the connecting hole. Finally, pour concrete 2 into the circular steel column tube 1 to slightly lower than the lower connecting hole, and pour concrete 2 into the gap between the inner side of the vertical square steel tube 301 and the outer side of the circular steel column tube 1 to slightly lower than the lower connecting hole. Insert the double-ended screw 4 into the connecting hole of the lower floor and screw on the nut 6, continue to pour concrete 2 into the circular steel column pipe 1 to slightly lower than the connecting hole on the upper floor, and continue to connect the inner side of the vertical square steel pipe 301 with the circular Concrete 2 is poured in the gap between the outer sides of the steel column pipe 1 to slightly lower than the upper connection hole, the double-ended screw 4 is inserted into the upper connection hole and the nut 6 is screwed on, and the inner side of the vertical square steel pipe 301 is connected with the circular steel pipe. Concrete 2 is poured to the upper edge of the vertical square steel pipe 301 in the gap between the outer sides of the column pipe 1, the upper end cover 302 is set on the outer side of the circular steel column pipe 1, and the upper end cover 302 is welded to the vertical square steel pipe 301 in turn. On the upper end face and the outer wall of the circular steel column tube 1, continue pouring concrete 2 into the circular steel column tube 1 to the upper edge of the circular steel column tube 1 to complete the construction.

With reference to Fig. 3, according to one embodiment of the present invention, in step 04, open connection hole on the sidewall of vertical square steel pipe 301, make it correspond to the position of the connection hole on the circular steel column pipe 1, then Connect the lower end cover 303 to the lower port of the vertical square steel pipe 301 by welding, after inserting the lower end cover 303 and the vertical square steel pipe 301 into the circular steel column tube 1, use the double-ended screw 4 and the nut 6 to connect the vertical square steel pipe 301 Fixedly connected to the circular steel column tube 1, then weld the lower end cover 303 on the side wall of the circular steel column tube 1, then unscrew the nut 6 from the double-ended screw 4, and take out the double-ended screw 4, Concrete 2 is poured in the vertical square steel pipe 301 again, makes the pouring height of concrete 2 slightly lower than the height of the connecting hole, and then the double-ended screw 4 is penetrated into the connecting hole on the circular steel column pipe 1 and the vertical square steel pipe 301, And tighten the nuts 6 at both ends of each double-ended screw 4, then continue to pour concrete 2 between the vertical square steel pipe 301 and the circular steel column pipe 1 until the upper port of the vertical square steel pipe 301, and wait for the concrete 2 to reach the predetermined After strength, put the upper end cover 302 into the circular steel column tube 1, first weld the upper end cover 302 to the upper port of the vertical square steel tube 301, then weld the upper end cover 302 to the circular steel column tube 1, and finally from the Unscrew the nut 6 on the double-ended screw rod 4.

In the above embodiments, pouring concrete 2 into the gap between the inside of the vertical square steel pipe 301 and the outside of the circular steel column pipe 1 can enhance the bending and torsion resistance of the node adapter 3 and prevent the node adapter from 3 Bending and deforming under force, during the process of pouring concrete 2, insert double-ended screws 4 into connecting holes of different heights in batches from bottom to top, which can prevent the double-ended screws 4 from blocking the concrete 2 when pouring concrete 2, The uneven texture of the poured concrete 2-column is avoided, and the reliability and bearing capacity of the concrete 2-column are enhanced.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these changes and modifications of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims (7)

1. the connecting joint structure of a kind of circular steel tube concrete post and steel structure girder, it is characterised in that including：

Concrete (2) has been poured in circular steel column jecket (1), the circular steel column jecket (1)；

Node switching part (3), the lateral wall of the node switching part (3) is vertical square steel tube (301), the vertical square steel tube (301) on the lateral wall for being sleeved on the circular steel column jecket (1), the edge of the upper end of the vertical square steel tube (301) is welded with Upper end cover (302), the edge of the lower end of the vertical square steel tube (301) is welded with bottom end cover (303), the vertical square steel tube (301) concrete (2) has been poured between the circular steel column jecket (1)；

Double threaded screw (4), level runs through the circular steel column jecket (1) and the vertical side to multiple double threaded screws (4) respectively The both sides of steel pipe (301), the two ends of multiple double threaded screws (4) are respectively from a pair of sides of the vertical square steel tube (301) On extend perpendicularly out；

Steel structure girder (5), the two ends of the steel structure girder (5) are welded with correspondence on end plates (501), the end plates (501) It is provided with and passes through nut (6) and institute respectively with multiple connecting holes corresponding with the double threaded screw (4), the end plates (501) Double threaded screw (4) is stated to be fixedly connected on a pair of sides of the vertical square steel tube (301).

2. the connecting joint structure of circular steel tube concrete post according to claim 1 and steel structure girder, it is characterised in that The bottom end cover (303) and the upper end cover (302) are welded to connect with the circular steel column jecket (1).

3. the connecting joint structure of circular steel tube concrete post according to claim 1 and steel structure girder, it is characterised in that The end plates (501) are rectangular, and the size at four edges of the end plates (501) is more than cutting for the steel structure girder (5) Face size, the end plates (501) are welded to connect with the side on the vertical square steel tube (301).

4. the connecting joint structure of circular steel tube concrete post according to claim 3 and steel structure girder, it is characterised in that The steel structure girder (5) is I-steel.

5. the connecting joint structure of circular steel tube concrete post according to any one of claim 1 to 4 and steel structure girder, Characterized in that, the width of the end plates (501) is equal to or less than the width of the side of the vertical square steel tube (301), institute The upper end edge and lower end edge for stating end plates (501) are located at the upper end edge and lower end of the vertical square steel tube (301) respectively The inner side at edge.

6. the connecting joint structure construction method of a kind of circular steel tube concrete post and steel structure girder, in claim 1 to 5 The construction of described circular steel tube concrete post Yu steel structure girder connecting joint structure, it is characterised in that comprise the following steps：

Step 02：Open up on the side wall of circular steel column jecket (1) and the predetermined connecting portion of steel structure girder (5) multipair align Connecting hole, then toward the interior casting concrete of the circular steel column jecket (1) (2), by concrete (2) in the circular steel column jecket (1) Pour to height and be slightly below the position of the connecting hole；

Step 04：Connecting hole is opened up on node switching part (3), makes its position with the connecting hole on the circular steel column jecket (1) Put corresponding, then node switching part (3) is inserted on circular steel column jecket (1), and will using double threaded screw (4) attaching nut (6) Node switching part (3) is fixedly connected on circular steel column jecket (1), then by node switching part (3) and the circular steel column jecket (1) It is welded to connect, nut (6) is finally backed out from double threaded screw (4)；

Step 06：Connecting hole is opened up in the two ends welding ends panel (501) of steel structure girder (5), and on end plates (501), is made Connecting hole on end plates (501) aligns one by one with the connecting hole on the side of the vertical square steel tube (301), first using nut (6) coordinate the double threaded screw (4) that the end plates (501) on two steel structure girders (5) are connected into vertical square steel tube (301) on two sides, then end plates (501) are welded to connect on two sides of the vertical square steel tube (301)；

Step 08：Continue casting concrete (2) in circular steel column jecket (1), concrete (2) was not had the double threaded screw (4), Complete construction.

7. the connecting joint structure construction method of circular steel tube concrete post according to claim 6 and steel structure girder, its It is characterised by, in step 04, opens up connecting hole on the side wall of the vertical square steel tube (301), make itself and circular steel column jecket (1) position of the connecting hole on is corresponding, then bottom end cover (303) is welded to connect in the lower end of the vertical square steel tube (301) Mouthful, the bottom end cover (303) and the vertical square steel tube (301) are inserted in after the circular steel column jecket (1), double threaded screw is used (4) vertical square steel tube (301) is fixedly connected on circular steel column jecket (1) by attaching nut (6), then welds bottom end cover (303) Connect and be fixed on the side wall of the circular steel column jecket (1), then back out nut (6) from double threaded screw (4), and by double threaded screw (4) take out, then toward vertical square steel tube (301) interior casting concrete (2), concrete (2) is poured height and be slightly below connecting hole height Degree, then penetrates the double threaded screw toward the connecting hole on the circular steel column jecket (1) and the vertical square steel tube (301) again (4) nut (6), and at the two ends of each double threaded screw (4) is tightened, is further continued for toward the vertical square steel tube (301) and institute Casting concrete (2) is until the upper port of vertical square steel tube (301), waits concrete (2) to reach pre- between stating circular steel column jecket (1) Determine after intensity, the upper end cover (302) is inserted in the circular steel column jecket (1), first the upper end cover (302) is welded to connect The upper end cover (302), is then welded to connect by the upper port of the vertical square steel tube (301) with the circular steel column jecket (1), Nut (6) is finally backed out from double threaded screw (4).