CN204715540U - A kind of round steel pipe binding type steel concrete column and steel beam joint structure - Google Patents

Abstract

The utility model discloses a joint structure of steel concrete columns and steel beams constrained by round steel pipes, which comprises core steel, longitudinal steel bars in several joint areas, stirrups in several joint areas, concrete, first steel beams, second steel beams, and third steel beams. Beam, the fourth steel beam, the first round steel pipe, the second round steel pipe and the restraint ring beam in the node area; the core section steel includes the first section steel web and the second section steel web, the first section steel web and the second section steel web The plates are welded to form a cross-shaped steel structure, and the two ends of the first steel web are respectively provided with the first steel flange and the second steel flange, and the two ends of the second steel web are respectively provided with the third steel flange and the second steel flange. For the four-shaped steel flange, the ring beam constrained by the node area includes a plurality of ring beam longitudinal reinforcements and a plurality of ring beam stirrups. The joint area of the utility model has strong strength, excellent anti-seismic performance, high bearing capacity, good integrity, clear force transmission, and is safe and reliable.

Description

A joint structure of circular steel pipe-constrained steel concrete columns and steel beams

technical field

The utility model belongs to the technical field of civil engineering structure design and relates to a joint structure of steel concrete columns and steel beams constrained by circular steel pipes.

Background technique

In the steel-concrete composite structure, the traditional vertical load-bearing columns mainly include two types of steel tube concrete columns and steel concrete columns. These two composite columns have high bearing capacity, good seismic performance, and moderate cost, and are favored by structural engineers, and have become the preferred component form of high-rise building frame columns. However, with the accumulation of engineering practice and the development of high-strength structural materials, they have gradually shown certain limitations. The ductility of steel tube concrete is better than that of reinforced concrete. However, the steel tube in the steel tube concrete column can only produce effective restraint on the core concrete after entering the elastic-plastic stage. buckling, resulting in a decrease in the seismic performance of the column. When concrete-filled steel tube columns are connected to reinforced concrete beams, two types of joints are often used: the piercing type and the external reinforcement ring type. The design of the joints is complicated and the construction is difficult. Reinforcement cages need to be installed in steel-reinforced concrete columns to ensure the joint action of concrete and steel bars, resulting in dense distribution of section steel and steel bars, making it difficult to pour concrete and vibrate, and the concrete in steel-concrete columns is not sufficiently restrained, resulting in deviations in the axial compression ratio limit. Low, can not make full use of the bearing capacity of steel and concrete.

On the basis of long-term scientific research work and engineering practice, Zhou Xuhong et al. proposed a new type of composite column structure—steel tube bound steel concrete column. The outsourcing steel pipes of the steel-constrained steel-concrete columns are disconnected at the beam-column joints and do not pass through the core area of the joints. The steel pipes do not bear the longitudinal load directly, but only constrain the core concrete. The steel pipe confined steel concrete column inherits the advantages of the steel pipe concrete column and the steel concrete column. The steel pipe imposes a continuous restraint on the concrete, which increases the compressive strength of the concrete and improves the ductility of the concrete; the presence of the steel improves the shear capacity of the column. ; The existence of concrete makes up for the shortcomings of section steel and empty steel pipes that are easy to buckle and lose stability. Based on the superior mechanical properties of steel pipe-confined steel concrete, scholars at home and abroad have conducted in-depth research on it in recent years. Studies have shown that steel pipe-constrained steel concrete columns have high compressive and shear bearing capacity, superior seismic performance, strong interlayer deformation capacity, good fire resistance, convenient construction, and can make full use of the properties of high-strength materials. combination structure.

At present, the research on steel pipe-constrained steel concrete mainly focuses on the static and seismic performance of components, and the research on steel pipe-confined steel concrete column-steel beam joints has not been carried out in depth and systematically. The frame beam-column joint is an important part of the frame structure, and the mechanical properties of the core area of the joint play a key role in the overall stiffness and mechanical performance of the structure. Previous earthquake damages have shown that the joint area is the most prone to damage under the action of earthquakes, and the lack of bearing capacity or deformation capacity of the joint area is an important cause of structural damage. Traditional CFST beam-column joints, such as through-reinforcement type and external reinforced ring type, must rely on steel pipes to transmit shear force to varying degrees, so that the steel pipes directly bear the longitudinal force. However, when steel-constrained steel-concrete frame columns are used, due to the essential difference in the stress mode, the steel pipes are disconnected at the joint area, and the joint area is weak, so the traditional joints cannot be used. In order to popularize the steel pipe-confined steel-concrete column, a new type of composite member with good mechanical performance, it is necessary to study and design the corresponding joints.

To sum up, steel pipe-confined steel concrete columns have superior mechanical properties and have broad application prospects. However, due to the disconnection of the outer steel pipe in the column, the force mode of the traditional composite column is fundamentally different from that of the traditional composite column, and the traditional joints that rely on the outer steel pipe to transmit shear force to varying degrees cannot be used, and the research on the joints applicable to steel pipe-constrained steel concrete columns has not been systematic. It is almost blank, which seriously restricts the application and development of steel pipe-confined steel concrete.

The joint performance research is a key scientific problem to be solved urgently. Therefore, the mechanical performance of steel pipe-constrained steel concrete columns and steel beam joints is systematically studied, and the design principle of "strong joints, weak components" is proposed. High bearing capacity, good integrity, transmission It is a key scientific problem to be solved urgently in the research of reinforced concrete structures confined by steel pipes, which have clear forces, are safe and reliable, and are convenient for construction.

Utility model content

The purpose of the utility model is to overcome the above-mentioned shortcomings of the prior art, and provide a circular steel pipe-constrained steel concrete column and steel beam joint structure. The joint area of the structure has strong strength, excellent seismic performance, high bearing capacity, and good integrity. The power transmission is clear, safe and reliable.

In order to achieve the above purpose, the circular steel pipe constrained steel concrete column and steel beam joint structure described in the utility model includes core steel, concrete, a first steel beam, a second steel beam, a third steel beam, a fourth steel beam, a first Round steel pipes, second round steel pipes and restraint ring beams in the node area;

The core shaped steel includes a first shaped steel web and a second shaped steel web, the first shaped steel web and the second shaped steel web are welded to form a cross shaped steel structure, and the two ends of the first shaped steel web are respectively provided with first shaped steel webs The flange and the second steel flange, the two ends of the second steel web are respectively provided with a third steel flange and a fourth steel flange;

The end of the first steel beam, the end of the second steel beam, the end of the third steel beam and the end of the fourth steel beam are respectively fixed on the outer surface of the first steel flange and the second steel flange. On the outer surface, the outer surface of the third steel flange and the outer surface of the fourth steel flange, and the first steel beam, the second steel beam, the third steel beam and the fourth steel beam form a cross structure;

The ring beam constrained by the node area includes a plurality of ring beam longitudinal reinforcements, and each ring beam longitudinal reinforcement passes through the web of the first steel beam, the web of the second steel beam, the web of the third steel beam and the web of the fourth steel beam. web;

The end of the first steel beam, the end of the second steel beam, the end of the third steel beam, the end of the fourth steel beam, the core section steel and the restraining ring beam in the node area are all wrapped in concrete, and the first round steel pipe and the second round steel pipe are sleeved on the concrete, and the first round steel pipe and the second round steel pipe are located at the upper part and the lower part of the cross-shaped structure respectively.

Each of the ring beam longitudinal reinforcements is bound with a plurality of ring beam stirrups to form a reinforcement cage.

It also includes a number of longitudinal reinforcements in the node area and a number of stirrups in the node area. The longitudinal reinforcement in each node area is distributed along the circumferential direction of the core steel. The longitudinal reinforcement in each node area is bound with the stirrups in the node area to form a reinforcement cage. The ends are respectively fixed on the inner wall of the first round steel pipe and the inner wall of the second round steel pipe.

The inner surface of the first steel flange is connected with the inner surface of the third steel flange through the first stiffener;

The inner surface of the first steel flange is connected with the inner surface of the fourth steel flange through the second stiffener;

The inner surface of the second steel flange is connected to the inner surface of the third steel flange through the third stiffener;

The inner surface of the second steel flange is connected with the inner surface of the fourth steel flange through the fourth stiffener.

There are gaps between the first round steel pipe, the second round steel pipe and the cross-shaped structure.

The longitudinal reinforcement of each node area is distributed in parallel, and the longitudinal reinforcement of each ring beam is distributed in parallel.

The webs of the first steel beam, the second steel beam, the third steel beam and the fourth steel beam are all provided with through holes for passing through the longitudinal reinforcement of the ring beam.

The utility model has the following beneficial effects:

In the joint structure of round steel pipe constrained steel concrete columns and steel beams described in the utility model, the first steel beam, the second steel beam, the third steel beam and the fourth steel beam are respectively fixed on the first steel wing after passing through the concrete The outer surface of the flange, the outer surface of the second steel flange, the outer surface of the third steel flange and the outer surface of the fourth steel flange can effectively transmit the bending moment, which meets the requirements of "stronger columns, weaker beams and stronger joints". " design principles. At the same time, the first round steel pipe and the second round steel pipe are socketed on the concrete, which can effectively provide a restraint effect on the concrete inside the steel pipe, and the concrete inside the steel pipe can also make up for the shortcomings of section steel and empty steel pipes that are easy to buckle and lose stability, thus realizing It has the characteristics of high bearing capacity, good integrity, clear force transmission, strong deformation ability between layers, good fire resistance, convenient construction and full use of high-strength material properties. In addition, the longitudinal reinforcement of the ring beam in the node area restrains the ring beam through the web of the first steel beam, the web of the second steel beam, the web of the third steel beam and the web of the fourth steel beam to ensure the joint Rigidity, so as to avoid the transverse fracture of the node area, the bearing capacity is greatly improved, and the design is simple, easy to construct, the node area is wrapped in concrete, and the overall performance is excellent.

Further, through the first stiffener, the second stiffener, the third stiffener and the fourth stiffener, the first steel flange, the second steel flange, the third steel flange and the fourth steel flange are connected to strengthen The strength of the joint area improves the seismic performance of the joint area, and the design and construction are simple.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a sectional view of the utility model.

Among them, 1 is the longitudinal reinforcement in the node area, 2 is the stirrup in the node area, 31 is the first steel flange, 32 is the second steel flange, 33 is the third steel flange, 34 is the fourth steel flange, 41 is The first stiffener, 42 is the second stiffener, 43 is the third stiffener, 44 is the fourth stiffener, 5 is the core steel, 61 is the second round steel pipe, 62 is the first round steel pipe, 71 is the first steel Beam, 72 is the second steel beam, 73 is the third steel beam, 74 is the fourth steel beam, 8 is the ring beam longitudinal reinforcement, 9 is the ring beam stirrup, 10 is the joint area restraint ring beam, 111 is the first section steel Web plate, 112 is the second type steel web plate.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Referring to Fig. 1 and Fig. 2, the circular steel pipe constrained steel concrete column and steel beam joint structure described in the utility model includes core steel 5, concrete, a first steel beam 71, a second steel beam 72, a third steel beam 73, a Four steel girders 74, the first round steel pipe 62, the second round steel pipe 61 and the restraint ring beam 10 in the node area; the core section steel 5 includes the first section steel web 111 and the second section steel web 112, the first section steel web 111 and the second section steel web 111 The two steel webs 112 are welded to form a cross-shaped steel structure, and the two ends of the first steel web 111 are respectively provided with a first steel flange 31 and a second steel flange 32, and the two ends of the second steel web 112 are respectively provided with There are third steel flange 33 and fourth steel flange 34; the end of the first steel beam 71, the end of the second steel beam 72, the end of the third steel beam 73 and the end of the fourth steel beam 74 respectively fixed on the outer surface of the first shaped steel flange 31, the outer surface of the second shaped steel flange 32, the outer surface of the third shaped steel flange 33 and the outer surface of the fourth shaped steel flange 34, and the first The steel beam 71, the second steel beam 72, the third steel beam 73 and the fourth steel beam 74 form a cruciform structure; the confinement ring beam 10 in the node area includes several ring beam longitudinal bars 8, and each ring beam longitudinal bar 8 passes through the first The web of the steel beam 71, the web of the second steel beam 72, the web of the third steel beam 73 and the web of the fourth steel beam 74; the end of the first steel beam 71, the end of the second steel beam 72 part, the end of the third steel beam 73, the end of the fourth steel beam 74, the core section steel 5 and the restraining ring beam 10 in the node area are all wrapped in concrete, and the first round steel pipe 62 and the second round steel pipe 61 are socketed in On the concrete, and the first round steel pipe 62 and the second round steel pipe 61 are respectively located at the upper part and the lower part of the cross-shaped structure.

It should be noted that each ring beam longitudinal bar 8 is bound with several ring beam stirrup bars 9 to form a reinforcement cage. In addition, the utility model also includes a number of longitudinal steel bars 1 in the node area and a number of stirrup bars 2 in the node area. The longitudinal steel bars 1 in each node area are distributed along the circumferential direction of the core steel 5. Reinforcement cage, the upper and lower ends of the longitudinal steel bars 1 in each node area are respectively fixed on the inner wall of the first round steel pipe 62 and the inner wall of the second round steel pipe 61; The side is connected by the first stiffener 41; the inner surface of the first steel flange 31 is connected with the inner surface of the fourth steel flange 34 by the second stiffener 42; the inner surface of the second steel flange 32 is connected with the third The inner surface of the shaped steel flange 33 is connected by the third stiffener 43, the inner surface of the second shaped steel flange 32 is connected with the inner surface of the fourth shaped steel flange 34 by the fourth stiffener 44; the first round steel pipe 62 and There is a gap between the second round steel pipe 61 and the cross-shaped structure; the longitudinal reinforcement 1 of each node area is distributed in parallel, and the longitudinal reinforcement 8 of each ring beam is distributed in parallel; the web of the first steel beam 71 and the web of the second steel beam 72 1. The web of the third steel beam 73 and the web of the fourth steel beam 74 are provided with through holes for the longitudinal reinforcement 8 of the ring beam to pass through.

The concrete implementation process of the present utility model is: 1) process and manufacture core shaped steel 5 according to the design requirements, weld the first stiffener 41, the second stiffener 42, the third stiffener 43 and the fourth stiffener 44 at the designed position of the core shaped steel 5 ; 2) hoisting the core section steel 55 and the second steel pipe column 61; 3) considering the sequence of welding the first steel beam 71, the second steel beam 72, the third steel beam 73, the fourth steel beam 74 and binding the steel bars in the node area , the node area longitudinal reinforcement 1 and the node area stirrup 2 in the second round steel pipe 61 can be bound earlier, and it is fixed in the second round steel pipe 61, and then 4) the first steel beam 71, the second steel beam 72 , the third steel beam 73 and the fourth steel beam 74 are connected to each other by welding with the core section steel 5; 5) binding the stirrups at the node, the ring beam longitudinal reinforcement 8 and the ring beam stirrup 9; 6) binding the first round steel pipe 62 7) hoisting the first round steel pipe 62; 8) overall uniform pouring of concrete.

Claims (7)

1. a round steel pipe binding type steel concrete column and steel beam joint structure, it is characterized in that, comprise core shaped steel (5), concrete, the first girder steel (71), the second girder steel (72), the 3rd girder steel (73), the 4th girder steel (74), the first round steel pipe (62), the second round steel pipe (61) and node area constraint ring beam (10);

Described core shaped steel (5) comprises the first shape steel web (111) and the second shape steel web (112), first shape steel web (111) welds with the second shape steel web (112) and forms cross-shaped profile steel structure, and the two ends of the first shape steel web (111) are respectively equipped with the first section steel flange (31) and the second section steel flange (32), the two ends of the second shape steel web (112) are respectively equipped with the 3rd section steel flange (33) and the 4th section steel flange (34);

The end of the end of the first girder steel (71), the end of the second girder steel (72), the 3rd girder steel (73) and the end of the 4th girder steel (74) is individually fixed on the lateral surface of the first section steel flange (31), on the lateral surface of the second section steel flange (32), on the lateral surface of the 3rd section steel flange (33) and on the lateral surface of the 4th section steel flange (34), and the first girder steel (71), the second girder steel (72), the 3rd girder steel (73) and the 4th girder steel (74) composition decussate texture;

Described node area constraint ring beam (10) comprises some ring beams and indulges muscle (8), and each ring beam indulges the web of muscle (8) through the web of the first girder steel (71), the web of the second girder steel (72), the web of the 3rd girder steel (73) and the 4th girder steel (74);

The end of the end of the first girder steel (71), the end of the second girder steel (72), the 3rd girder steel (73), the end of the 4th girder steel (74), core shaped steel (5) and node area constraint ring beam (10) are all wrapped in concrete, first round steel pipe (62) and the second round steel pipe (61) are socketed on concrete, and the first round steel pipe (62) and the second round steel pipe (61) lay respectively at top and the bottom of decussate texture.

2. round steel pipe binding type steel concrete column according to claim 1 and steel beam joint structure, it is characterized in that, described node area constraint ring beam (10) also comprises some ring beam stirrups (9), and described each ring beam is indulged muscle (8) and formed reinforcing cage with the colligation of some ring beam stirrups (9).

3. round steel pipe binding type steel concrete column according to claim 1 and steel beam joint structure, it is characterized in that, also comprise some node area longitudinal reinforcements (1) and some node area stirrups (2), each node area longitudinal reinforcement (1) distributes along the circumference of core shaped steel (5), each node area longitudinal reinforcement (1) and node area stirrup (2) colligation form reinforcing cage, and the two ends up and down of each node area longitudinal reinforcement (1) are individually fixed in the inwall of the first round steel pipe (62) and the inwall of the second round steel pipe (61).

4. round steel pipe binding type steel concrete column according to claim 1 and steel beam joint structure, is characterized in that,

The medial surface of the first section steel flange (31) is connected by the first stiffening rib (41) with the medial surface of the 3rd section steel flange (33);

The medial surface of the first section steel flange (31) is connected by the second stiffening rib (42) with the medial surface of the 4th section steel flange (34);

The medial surface of the second section steel flange (32) is connected by the 3rd stiffening rib (43) with the medial surface of the 3rd section steel flange (33);

The medial surface of the second section steel flange (32) is connected by the 4th stiffening rib (44) with the medial surface of the 4th section steel flange (34).

5. round steel pipe binding type steel concrete column according to claim 1 and steel beam joint structure, is characterized in that, described first round steel pipe (62) and all have gap between the second round steel pipe (61) and decussate texture.

6. round steel pipe binding type steel concrete column according to claim 1 and steel beam joint structure, is characterized in that, the parallel distribution of each node area longitudinal reinforcement (1), each ring beam indulges muscle (8) parallel distribution.

7. round steel pipe binding type steel concrete column according to claim 1 and steel beam joint structure, it is characterized in that, the web of the web of described first girder steel (71), the web of the second girder steel (72), the 3rd girder steel (73) and the web of the 4th girder steel (74) all offer the through hole passed for indulging muscle (8) for ring beam.