CN216428562U - An assembled beam-column weak-axis connection node - Google Patents

Abstract

The utility model discloses an assembled beam-column weak-axis connection node, which comprises an I-shaped column, a stiffening rib group is arranged on one side or both sides of the I-shaped column, and each stiffening rib group includes two stiffening ribs; The stiffeners are arranged in parallel up and down between the flanges in the weak axis direction of the I-shaped column; the beam end of the I-shaped beam is located between the flanges in the weak axis direction of the I-shaped column, and is located in the two Between the stiffeners; two node connector sets are arranged at the nodes of the I-shaped beam and the I-shaped column, and are symmetrically arranged on both sides of the web of the I-shaped beam; each node connector set includes two The node connector is fixed and connected with the I-shaped column, the I-shaped beam and the stiffening rib by high-strength bolts; the concrete slab is horizontally arranged on the upper flange surface of the I-shaped beam; the utility model has good The ductility and bearing capacity effectively improve the deformation capacity and seismic performance of the beam-column weak axis connection node, the structure is simple, and the construction difficulty is small.

Description

An assembled beam-column weak-axis connection node

technical field

The utility model belongs to the technical field of construction engineering, in particular to an assembled beam-column weak-axis connection node.

Background technique

Prefabricated steel structures have the advantages of being suitable for factory production, higher recycling rate of garbage and waste, lighter components, suitable for transportation and assembly, and easy to install and disassemble; therefore, most countries with mature construction industrialization use prefabricated steel structures to develop Industrialization of construction. At present, the prefabricated steel structure industry is facing some problems, such as the unsound prefabricated industrial chain; the lack of simple and fast assembly nodes; the use of less bolted connections, the large amount of on-site welding, and the difficulty in guaranteeing the quality.

Although welded rigid joints are widely used in steel frames and composite frames due to their advantages of high bearing capacity, high stiffness and simple structure; however, during the earthquake, a large number of welded steel joints designed and constructed in accordance with the specifications have unexpectedly occurred. Brittle failure; most of the existing beam-column weak-axis connections are welded by the flange of the beam and the web of the column; since the width of the flange of the beam is usually smaller than the width of the web of the column, plastic yielding occurs first under the action of external force The position of the plastic hinge is changed on the web of the column instead of the end of the beam; it may cause local buckling failure of the web or flange of the column, which greatly reduces the seismic performance of the joint; currently, stiffeners are also used between the beam and the column. , the beam-column is welded and fixed by the stiffening rib, but a large number of seam welding will be introduced, the welding workload is large, and the quality of the welding seam is not easy to guarantee; especially at the position of the welding seam, it is easy to cause stress concentration and brittle failure, and the deformation capacity is poor; in addition, the beam The weak shaft connection of the column is limited by the space of the column flange, so the installation is difficult and the connection structure design is complicated.

Utility model content

Aiming at the technical problems existing in the prior art, the utility model provides an assembled beam-column weak-axis connection node to solve the problems of poor deformation capacity, low seismic performance and difficult construction of the existing beam-column weak-axis connection node. question.

In order to achieve the above object, the technical scheme adopted by the present utility model is:

The utility model provides an assembled beam-column weak-axis connection node, which comprises an I-shaped column, an I-shaped beam, two node connecting component groups and a concrete slab; one side or both sides of the I-shaped column is provided with stiffeners Rib group, the stiffening rib group is arranged in the weak axis direction of the I-shaped column; each stiffening rib group includes two stiffening ribs; the two stiffening ribs are arranged in parallel between the flanges in the weak axis direction of the I-shaped column;

The I-shaped beam is horizontally arranged on one or both sides of the I-shaped column, and the beam end of the I-shaped beam is located between the flanges in the weak axis direction of the I-shaped column, and is located between the two stiffeners of the stiffening rib group. between;

The two node connector groups are both arranged at the nodes of the I-shaped beam and the I-shaped column, and are symmetrically arranged on both sides of the web of the I-shaped beam; each node connector group includes two node connectors, two Each node connector is located on the same side of the web of the I-shaped beam, and is symmetrically arranged up and down along the horizontal axis of the I-shaped beam; high-strength bolts are used between the node connector and the I-shaped column, I-shaped beam and stiffener. fixed connection;

The concrete slab is horizontally arranged on the upper flange surface of the I-shaped beam, the lower surface of the concrete slab is fixedly connected with the upper flange of the I-shaped beam, and the end of the concrete slab is in close contact with the outer surface of the I-shaped column.

Further, one end of the stiffening rib is fixedly connected to the web of the I-shaped column, both sides of the stiffening rib are fixedly connected to the flanges on both sides of the I-shaped column, and the other end of the stiffening rib is connected to the upper flange or the upper flange of the I-shaped beam. The outer surfaces of the lower flange are in close contact;

In the same stiffener group, one of the stiffeners is fixedly connected to the upper flange of the I-beam and one of the node connectors through high-strength bolts; the other stiffener is connected to the lower flange of the I-beam and the other through high-strength bolts. The node connector is fixedly connected; the end of the node connector is fixedly connected with the web of the I-shaped column through high-strength bolts.

Further, the node connector includes a first steel plate, a second steel plate and a third steel plate; the first steel plate is arranged vertically, and the second steel plate is arranged horizontally; the first steel plate and the second steel plate are vertically fixed to form an L-shaped connection structure; The steel plate is vertically arranged at the end of the L-shaped connection node, and is arranged close to the web of the I-shaped column;

The first steel plate and the web of the I-beam are fixedly connected by high-strength bolts; the second steel plate and the upper or lower flange of the I-beam and one of the stiffeners are fixedly connected by high-strength bolts; the third The steel plate and the web of the I-shaped column are fixedly connected by high-strength bolts.

Further, the first steel plate and the second steel plate are fixed by welding or integrally formed; the third steel plate and the first steel plate or the second steel plate are fixed by welding or integrally formed.

Further, the sizes of the first steel plate, the second steel plate and the third steel plate in the same node connector are independent of each other; wherein, the minimum size of the first steel plate, the second steel plate and the third steel plate is zero, and the first steel plate, The minimum dimension of at most one of the second steel plate and the third steel plate is zero.

Further, the dimensions of the first steel plate, the second steel plate and the third steel plate include the dimension of the long side, the dimension of the short side or the thickness of the steel plate.

Further, several shear connectors are arranged between the concrete slab and the I-shaped beam, the upper end of the shear connector extends into the concrete slab, and the lower end is fixedly connected with the upper flange of the I-shaped beam.

Further, several shear connectors are evenly distributed in two rows along the horizontal axis of the I-shaped beam.

Further, the concrete slab includes a concrete cast body and a slab reinforcement cage; the slab reinforcement cage is formed by uniformly binding several longitudinal reinforcing bars and several transverse reinforcing bars, and the concrete pouring body is wrapped on the outside of the slab reinforcing cage.

Compared with the prior art, the beneficial effects of the present utility model are:

The utility model provides an assembled beam-column weak-axis connection node. By arranging a stiffening rib in the weak-axis direction of an I-shaped column, the beam end of the I-shaped beam is in close contact with the stiffening rib in the weak-axis direction of the I-shaped column. , and set node connectors between the I-shaped beam and the I-shaped column; the node connectors are arranged in pairs and symmetrically, and the I-shaped beam, the I-shaped column, the node connector and the stiffener are connected by high-strength bolts. They are fixedly connected, and semi-rigid bolted joints are formed at the weak-axis connection nodes of beams and columns; semi-rigid bolted joints are used for connection, so that the deformation and stress performance of the joints are between completely rigid and ideal hinged, so that they have The high bearing capacity of the rigid joint also has the rotation ability of the hinge point; under the action of external force, it has a certain rotation ability, dissipates energy through deformation, and has good ductility and bearing capacity; at the same time, it avoids the flange of the I-beam. It is directly connected to the web of the I-shaped column, so that the position of the plastic hinge is far from the direction of the web of the I-shaped column, and the connection between the high-strength bolt and the stiffener avoids the existence of a large number of welds, not only the ability to rotate and consume energy. It can effectively avoid the brittle failure of the weld due to quality problems, and effectively improve the deformation capacity and seismic performance of the weak axis connection of the beam and column. The structure is simple and the construction difficulty is small.

Further, the stiffening rib is fixed to the web and flange of the I-shaped column, and is in close contact with the outer surface of the flange of the I-shaped beam, and the stiffening rib, I-shaped column, I-shaped beam and the The node connectors are fixed, and the stiffener can ensure the local stability of the component and transmit the load, which can improve the stability and torsional performance of the component. The stiffeners are suitable to be arranged in pairs on both sides of the web, and can also be arranged on one side.

Further, the sizes of the first steel plate, the second steel plate and the third steel plate in the same node connector are independent of each other. When the moment is large and the shearing force is small, a second steel plate with a larger size, a third steel plate and a first steel plate with a smaller size or no first steel plate can be used; when the bending moment is small and the shearing force is large, it can be used. The first steel plate, the third steel plate and the second steel plate of smaller size are used or no second steel plate is provided; the bending moment is pulled through the high-strength bolts of the third steel plate, the second steel plate is connected to the upper and lower flanges of the I-beam The friction and high-strength bolts are resisted by shear, and the shear force is resisted by the friction between the third steel plate and the flange in the strong axis direction of the I-shaped column and the friction between the first steel plate and the web of the I-beam and the corresponding high-strength bolts; the bending moment and When the shear force is relatively large, the three steel plates work together to resist the bending moment and shear force; the form of the joint connector is simple, the length of the seam welding is short and the number is small, which is convenient for mass production in the factory assembly line; the joint connector is set in the I-shaped The inner side of the flange of the beam ensures the space utilization rate at the node to a great extent.

Further, by arranging a shear connector between the concrete slab and the I-shaped beam, the shear connector can resist the longitudinal shear force between the concrete slab and the I-shaped beam, so that the two cannot slide freely, so as to achieve a common effect. The force and deformation are coordinated; at the same time, it can resist the lifting force between the concrete slab and the I-shaped beam.

Description of drawings

1 is a schematic diagram of the overall structure of the assembled beam-column weak-axis connection node according to the embodiment;

2 is a schematic elevational structure diagram of an assembled beam-column weak-axis connection node according to an embodiment;

Fig. 3 is the A-A cross-sectional schematic diagram of the assembled beam-column weak-axis connection node according to the embodiment;

Fig. 4 is the beam-slab side view in the assembled beam-column weak-axis connection node according to the embodiment;

5 is an elevation view of the beam-slab joint in the assembled beam-column weak-axis connection node according to the embodiment;

6 is a schematic structural diagram of a node connector of an assembled beam-column weak-axis connection node according to an embodiment;

FIG. 7 is an exploded effect diagram of the assembled beam-column weak-axis connection node according to the embodiment.

Among them, 1 I-shaped column, 2 I-shaped beam, 3 concrete cast body, 4 plate reinforcement cage, 5 shear connectors, 6 joint connectors, 7 high-strength bolts, 8 stiffeners, 9 first steel plates, 10 Second steel plate, 11 third steel plate, 12 concrete plate.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the following specific embodiments will further describe the present invention in detail. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention.

The utility model provides an assembled beam-column weak-axis connection node, comprising an I-shaped column 1, an I-shaped beam 2, a plurality of shear-resisting connectors 5, two node connector groups, a plurality of high-strength bolts 7, and stiffening ribs Group and concrete slab 12.

The I-shaped column 1 is arranged vertically, and one side or both sides of the I-shaped column 1 is provided with a stiffening rib group; wherein, the stiffening rib group is arranged in the weak axis direction of the I-shaped column 1; each stiffening rib group includes two. Two stiffening ribs 8; two stiffening ribs 8 are arranged in parallel between the flanges of the I-shaped column 1 in the weak axis direction.

The I-shaped beam 2 is horizontally arranged on one side or both sides of the I-shaped column 1, and the beam end of the I-shaped beam 2 is located between the flanges in the weak axis direction of the I-shaped column 1, and is located at the end of the stiffening rib group. Between the two stiffening ribs 8; one end of the stiffening rib 8 is fixedly connected to the web of the I-shaped column 1, both sides of the stiffening rib 8 are fixedly connected to the flanges on both sides of the I-shaped column 1, and the other end of the stiffening rib 8 It is in close contact with the outer surface of the upper or lower flange of the I-beam 2; in the same stiffening rib group, one of the stiffeners 8 is connected to the upper flange of the I-beam 2 and one of the nodes through high-strength bolts 7 Part 6 is fixedly connected; another stiffener 8 is fixedly connected to the lower flange of the I-beam 2 and another node connector 6 through high-strength bolts; the end of the node connector 6 is connected to the I-shaped column 1 through high-strength bolts 7 fixed web connection.

The two node connector groups are both arranged at the nodes of the I-shaped beam 2 and the I-shaped column 1, and are symmetrically arranged on both sides of the web of the I-shaped beam 2; each node connector group includes two node connections. Part 6, two node connectors 6 are located on the same side of the web of the I-shaped beam 2, and are arranged symmetrically up and down along the horizontal axis of the I-shaped beam 2; 2 and the stiffening rib 8 are fixedly connected by high-strength bolts 7.

The node connector 6 includes a first steel plate 9, a second steel plate 10 and a third steel plate 11; the first steel plate 9 is arranged vertically, and the second steel plate 10 is arranged horizontally; the first steel plate 9 and the second steel plate 10 are vertically fixed to form an L-shape Connection structure; the third steel plate 11 is vertically arranged at the end of the L-shaped connection node, and is arranged close to the web of the I-shaped column 1;

The first steel plate 9 and the web of the I-beam 2 are fixedly connected by high-strength bolts 7; The bolts 7 are fixedly connected; the third steel plate 11 and the web plate of the I-shaped column 1 are fixedly connected by high-strength bolts 7 .

In the present invention, the first steel plate 9 and the second steel plate 10 are welded and fixed or integrally formed; the third steel plate 11 and the first steel plate 9 or the second steel plate 10 are welded and fixed or integrally formed; The dimensions of the first steel plate 9, the second steel plate 10 and the third steel plate 11 in the same node connector 6 are independent of each other; wherein, the minimum dimensions of the first steel plate 9, the second steel plate 10 and the third steel plate 11 are zero, and The minimum size of at most one steel plate in the first steel plate 9, the second steel plate 10 and the third steel plate 11 is zero; wherein, the dimensions of the first steel plate 9, the second steel plate 10 and the third steel plate 11 Edge size or thickness.

The concrete slab 12 is horizontally arranged on the upper flange surface of the I-shaped beam 2, the lower surface of the concrete slab 12 is fixedly connected with the upper flange of the I-shaped beam 2, and the end of the concrete slab 12 is connected to the outer surface of the I-shaped column 1. The surfaces are in close contact. A number of shear connectors 5 are arranged between the concrete slab 12 and the I-shaped beam 2, the upper end of the shear connector 5 extends into the concrete slab 12, and the lower end is fixedly connected with the upper flange of the I-shaped beam 2; The shear connectors 5 are evenly distributed in two rows along the horizontal axis of the I-shaped beam 2; the concrete slab 12 includes a concrete pouring body 3 and a slab reinforcement cage 4; , the concrete pouring body 3 is wrapped on the outside of the reinforcement cage 4 of the plate body.

The construction method of the prefabricated beam-column weak-axis connection node of the utility model comprises the following steps:

Step 1. According to the design requirements, process the I-shaped column 1, the I-shaped beam 2, and the node connector 6; and install the stiffening rib group on one side or both sides of the I-shaped beam 2;

Step 2, install the I-shaped column 1, and hoist the I-shaped beam 2 to the preset installation position, and ensure that the beam end of the I-shaped beam 2 is located between the two stiffening ribs 8 of the stiffening rib group;

Step 3. Use high-strength bolts 7 to connect the node connector 6 to the I-shaped beam 2, the I-shaped column 1 and the stiffener 8, so that the I-shaped beam 2 and the I-shaped column 1 are fixedly connected together;

Step 4. On the surface of the upper flange of the I-shaped beam 2, a concrete slab 12 is poured on site.

Working principle or force principle

In the assembled beam-column weak-axis connection node of the utility model, the stiffening rib is arranged in the weak-axis direction of the I-shaped column, and the beam end of the I-shaped beam is in close contact with the stiffening rib in the weak-axis direction of the I-shaped column. Node connectors are arranged between the I-shaped beam and the I-shaped column; the node connectors are arranged in pairs and symmetrically, and the I-shaped beam, the I-shaped column, the node connector and the stiffener are connected by high-strength bolts. Fixed connection, semi-rigid bolted joints are formed at the weak axis of beam-column joints; the deformation and force performance of the semi-rigid bolted joints are between complete rigidity and ideal hinged joints; therefore, it has the high load-bearing capacity of rigid joints The force also has the ability to rotate at the hinge point; under the action of external force, it has a certain ability to rotate, dissipates energy through deformation, and has good ductility and bearing capacity.

In the utility model, under the condition of ensuring the good mechanical performance of the semi-rigid connection, the joint plastic hinge can be prevented from first appearing on the web plate of the I-shaped column; at the same time, the number of welds in the area of the stiffener and the joint connecting piece is small. And the length of the weld is short, which greatly reduces the existence of residual stress in the heat-affected zone, its mechanical properties are easily guaranteed, and brittle failure is not easy to occur under the action of external force; the form of the connector is simple, and the number of components is small; the node connector can be made of one piece By bending twice, the L-shaped steel plate will be welded with only one short weld, or welded with angle steel and one steel plate, or welded with three steel plates. Since the node connectors are all arranged inside the beam flange, the space utilization rate at the nodes is guaranteed to a great extent.

Example

As shown in Figures 1-7, take two I-shaped beams 2 symmetrically arranged on both sides of the weak axis direction of the I-shaped column 1, that is, a cross node as an example; this embodiment provides an assembled beam-column weak The shaft connection nodes include I-shaped columns 1 , two I-shaped beams 2 , several shear connectors 5 , four node connector sets, several high-strength bolts 7 , two stiffening rib sets and concrete slabs 12 .

The I-shaped column 1 is arranged vertically, and stiffening rib groups are respectively provided on both sides of the I-shaped column 1; wherein, the two stiffening rib groups are symmetrically arranged in the weak axis direction of the I-shaped column 1; each stiffening rib group includes Two stiffeners 8, two stiffeners 8 are arranged in parallel between the flanges in the weak axis direction of the I-shaped column 1; the two I-shaped beams 2 are horizontally arranged on both sides of the I-shaped column 1, The beam end of the beam 2 is located between the flanges in the weak axis direction of the I-shaped column 1, and between the two stiffeners 8 of the stiffening rib group; one of the I-shaped beams 2 and the I-shaped column 1 Two node connector groups are arranged between them, and two node connector groups are arranged between the other I-shaped beam 2 and the I-shaped column 1 .

In this embodiment, the node connection structure between the two I-shaped beams 2 and the I-shaped column 1 is the same. illustrate.

The two node connector groups are both arranged at the nodes of the I-shaped beam 2 and the I-shaped column 1, and are symmetrically arranged on both sides of the web of the I-shaped beam 2; each node connector group includes two node connections. Part 6, two node connectors 6 are located on the same side of the web of the I-shaped beam 2, and are arranged symmetrically up and down along the horizontal axis of the I-shaped beam 2; 2 and the stiffening rib 8 are fixedly connected by high-strength bolts 7.

One end of the stiffening rib 8 is fixedly connected to the web of the I-shaped column 1, both sides of the stiffening rib 8 are fixedly connected to the flanges on both sides of the I-shaped column 1, and the other end of the stiffening rib 8 is connected to the upper part of the I-shaped beam 2. The outer surface of the flange or the lower flange is in close contact; in the same set of stiffeners, one of the stiffeners 8 is fixedly connected to the upper flange of the I-beam 2 and one of the node connectors 6 through high-strength bolts 7; the other stiffener The rib 8 is fixedly connected to the lower flange of the I-shaped beam 2 and another node connector 6 through high-strength bolts; the end of the node connector 6 is fixedly connected to the web of the I-shaped column 1 through high-strength bolts 7 .

The node connector 6 includes a first steel plate 9, a second steel plate 10 and a third steel plate 11; the first steel plate 9 is arranged vertically, and the second steel plate 10 is arranged horizontally; the first steel plate 9 and the second steel plate 10 are vertically fixed to form an L-shape Connection structure; the third steel plate 11 is vertically arranged at the end of the L-shaped connection node, and is arranged close to the web of the I-shaped column 1;

The first steel plate 9 is arranged in close contact with the web of the I-beam 2, and the first steel plate 9 and the web of the I-beam 2 are fixedly connected by high-strength bolts 7; The upper flange or the lower flange is closely arranged, and the second steel plate 10 is fixedly connected with the upper or lower flange of the I-beam 2 and one of the stiffeners 8 by high-strength bolts 7; The webs of the I-shaped column 1 are in close contact, and the third steel plate 11 and the web of the I-shaped column 1 are fixedly connected by high-strength bolts 7 .

In this embodiment, the first steel plate 9 and the second steel plate 10 are fixed by welding or integrally formed; the third steel plate 11 and the first steel plate 9 or the second steel plate 10 are fixed by welding or integrally formed; The dimensions of the first steel plate 9, the second steel plate 10 and the third steel plate 11 in the same node connector 6 are independent of each other; wherein, the minimum dimensions of the first steel plate 9, the second steel plate 10 and the third steel plate 11 are zero, and The minimum size of at most one steel plate in the first steel plate 9, the second steel plate 10 and the third steel plate 11 is zero; wherein, the dimensions of the first steel plate 9, the second steel plate 10 and the third steel plate 11 Edge size or thickness.

In this embodiment, in the node connector 6, the sizes of the first steel plate 9, the second steel plate 10 and the third steel plate 11 are reasonably selected according to the stress conditions and sizes of the components of the actual project under the condition that the requirements of the national industry standard are met; At least one bolt hole is provided on the steel plate 9, the second steel plate 10 and the third steel plate 11. The number of bolt holes and the spacing between adjacent bolt holes are calculated and meet the requirements of current steel structure specifications.

In this embodiment, the node connector 6 has a simple form and a small number of components; the node connector 6 can be formed by bending a piece of L-shaped steel plate twice to weld only a short weld, or use an angle steel and a steel plate. Welded, or welded with three steel plates, in various forms, which is convenient for mass production in factory assembly lines.

In the beam-column weak axis connection node, the sizes of the first steel plate 9, the second steel plate 10 and the third steel plate 11 in the same node connector are independent of each other. Type, such as: main beam, secondary beam or main and secondary beam connection; or the stress condition of the member, select the size and form of each steel plate in the node connector; among them, when the bending moment is large and the shear force is small, the larger The size of the second steel plate 10, the third steel plate 11 and the smaller size of the first steel plate 9 or the first steel plate 9 is not provided; when the bending moment is smaller and the shear force is larger, the larger size of the first steel plate 9, The third steel plate 11 and the second steel plate 10 of smaller size or the second steel plate 10 is not provided; the bending moment is pulled through the high-strength bolts 7 of the third steel plate 11, The friction and high-strength bolts 7 are resisted by shearing, and the shear force passes through the friction between the third steel plate 11 and the strong axial flange of the I-shaped column 1 and the friction between the first steel plate 9 and the web of the I-shaped beam 2 and the corresponding high-strength bolts 7 Shear resistance; when the bending moment and shear force at the connection node are relatively large, the first steel plate 9, the second steel plate 10 and the third steel plate 11 are all arranged to act together to resist the bending moment and shear force.

The concrete slab 12 is horizontally arranged on the upper flange surface of the I-shaped beam 2, the lower surface of the concrete slab 12 is fixedly connected with the upper flange of the I-shaped beam 2, and the end of the concrete slab 12 is connected to the outer surface of the I-shaped column 1. The surfaces are in close contact; a number of shear connectors 5 are arranged between the concrete slab 12 and the I-shaped beam 2, the upper end of the shear connector 5 extends into the concrete slab 12, and the lower end is fixed with the upper flange of the I-shaped beam 2 Connection; a number of shear connectors 5 are evenly distributed in two rows along the horizontal axis of the I-beam 2; the concrete slab 12 includes a concrete cast body 3 and a slab reinforcement cage 4; The steel bars are evenly bound and formed, and the concrete pouring body 3 is wrapped on the outside of the steel bar cage 4 of the plate body.

In this embodiment, the node connectors 6 are arranged in pairs, which are divided into two pairs, each pair is composed of two node connectors 6, and the first pair is arranged on the wing of the I-beam 2 on one side of the shear connector 5 The inner side of the edge and both sides of the corresponding web; wherein, the pair of first steel plates 9 are connected with the web of the I-beam 2 on one side of the shear connector 5, and the paired second steel plates 10 are connected with the shear connection. The inner side of the flange of the I-shaped beam 2 on one side of the piece 5 is connected; the second pair is arranged on the inner side of the flange of the I-shaped beam 2 away from the side of the shear connector 5 and on both sides of the corresponding web; The first steel plate 9 is connected with the web of the I-beam 2 on the side away from the shear connector 5, and the paired second steel plates 10 are connected with the inner side of the flange of the I-beam 2 on the side away from the shear connector 5; The third steel plates in the two pairs of node connections 6 are both fixedly connected to the webs of the I-shaped column 1 .

construction process:

In the factory, the I-shaped beam 2 and the I-shaped column 1 are prefabricated and the bolt holes are opened; among them, the shear connector 5 on the I-shaped beam 2 and the stiffener in the weak axis direction of the I-shaped column 1 8 is also prefabricated in the factory and assembled in place, and then transported to the construction site; the I-shaped beam 2 and the I-shaped column 1 are connected through the node connector 6 and the high-strength bolt 7; Finally, the concrete slab 12 is bound by the workers on site. The cage 44 is constructed and the concrete cast body 3 is constructed.

In the assembled beam-column weak-axis connection node described in this embodiment, by arranging stiffeners in the weak-axis direction of the I-shaped column, the beam end of the I-shaped beam is in close contact with the stiffening rib in the weak-axis direction of the I-shaped column. Node connectors are arranged between the I-shaped beam and the I-shaped column; the node connectors are arranged in pairs and symmetrically, and the I-shaped beam, the I-shaped column, the node connector and the stiffener are connected by high-strength bolts. Fixed connection, semi-rigid bolt connection joints are formed at the weak axis connection joints of beams and columns; the upper flange of the I-shaped beam is provided with double rows of shear connectors; The structure of the beam-column connection node is simple, easy to construct and use, and has stronger deformation capacity, clear force, strong bearing capacity, and strong energy dissipation capacity, which can be used in standardized assembled steel frame composite structures. .

In the present invention, the weak-axis connection nodes of beams and columns are set as semi-rigid bolted connection nodes, and the deformation and force performance of semi-rigid bolted connection are between complete rigidity and ideal hinged connection; therefore, it has the high load-bearing capacity of rigid nodes. The force also has the rotation ability of the hinge point; under the action of external force, it has a certain rotation ability, dissipates energy through deformation, and has good ductility and bearing capacity; under the condition of ensuring good mechanical performance of semi-rigid connections, it avoids joints The problem of plastic hinge first appeared in the column web; at the same time, the short and fewer welds in the connection area between the stiffener and the node connector greatly reduce the residual stress in the heat-affected zone, and its mechanical properties can be easily guaranteed. Brittle failure is not easy to occur under the action.

The described embodiment is only one of the embodiments that can realize the technical solution of the present invention, and the scope of protection claimed by the present invention is not only limited by the present embodiment, but also included in the technical scope disclosed by the present invention, Any changes, substitutions, and other implementations that are likely to occur to those skilled in the art.

Claims (9)

1. An assembled beam-column weak-axis connection node is characterized in that, comprising I-shaped column (1), I-shaped beam (2), two node connector groups and concrete slab (12); I-shaped One or both sides of the column (1) are provided with a stiffening rib group, and the stiffening rib group is arranged in the direction of the weak axis of the I-shaped column (1); each stiffening rib group includes two stiffening ribs (8); The ribs (8) are arranged in parallel up and down between the flanges of the I-shaped column (1) in the weak axis direction; The I-shaped beam (2) is horizontally arranged on one or both sides of the I-shaped column (1), and the beam end of the I-shaped beam (2) is located between the flanges in the weak axis direction of the I-shaped column (1). between the two stiffeners (8) of the stiffener group; The two node connector groups are both arranged at the nodes of the I-shaped beam (2) and the I-shaped column (1), and are symmetrically arranged on both sides of the web of the I-shaped beam (2); each node connector The group includes two node connectors (6), the two node connectors (6) are located on the same side of the web of the I-shaped beam (2), and are arranged symmetrically up and down along the horizontal axis of the I-shaped beam (2); High-strength bolts (7) are used for fixed connection between the connecting piece (6) and the I-shaped column (1), the I-shaped beam (2) and the stiffening rib (8); The concrete slab (12) is horizontally arranged on the upper flange surface of the I-shaped beam (2), the lower surface of the concrete slab (12) is fixedly connected with the upper flange of the I-shaped beam (2), and the The ends are in close contact with the outer surface of the I-shaped column (1). 2. An assembled beam-column weak-axis connection node according to claim 1, wherein one end of the stiffening rib (8) is fixedly connected to the web of the I-shaped column (1), and the stiffening rib (8) The two sides of the I-shaped column (1) are fixedly connected with the flanges on both sides, and the other end of the stiffener (8) is in close contact with the outer surface of the upper or lower flange of the I-shaped beam (2); In the same stiffener group, one of the stiffeners (8) is fixedly connected to the upper flange of the I-beam (2) and one of the node connectors (6) through high-strength bolts (7); the other stiffener (8) The lower flange of the I-shaped beam (2) and the other node connector (6) are fixedly connected by high-strength bolts; the end of the node connector (6) is connected to the I-shaped column (1) through high-strength bolts (7) fixed web connection. 3. An assembled beam-column weak-axis connection node according to claim 1, wherein the node connector (6) comprises a first steel plate (9), a second steel plate (10) and a third steel plate (11) ); the first steel plate (9) is arranged vertically, and the second steel plate (10) is arranged horizontally; the first steel plate (9) is vertically fixed with the second steel plate (10) to form an L-shaped connection structure; the third steel plate (11) is vertical Set towards the end of the L-shaped connection node and close to the web of the I-shaped column (1); The first steel plate (9) and the web of the I-beam (2) are fixedly connected by high-strength bolts (7); the second steel plate (10) and the upper or lower flange of the I-beam (2) and one of the stiffening ribs (8) is fixedly connected by high-strength bolts (7); the third steel plate (11) and the web of the I-shaped column (1) are fixedly connected by high-strength bolts (7). 4. An assembled beam-column weak-axis connection node according to claim 3, characterized in that the first steel plate (9) and the second steel plate (10) are fixed by welding or integrally formed; the third The steel plate (11) and the first steel plate (9) or the second steel plate (10) are fixed by welding or integrally formed. 5. An assembled beam-column weak-axis connection node according to claim 3, characterized in that the first steel plate (9), the second steel plate (10) and the third steel plate in the same node connecting piece (6) The dimensions of (11) are independent of each other; wherein, the minimum dimensions of the first steel plate (9), the second steel plate (10) and the third steel plate (11) are zero, and the first steel plate (9), the second steel plate (10) ) and at most one of the third steel plates (11) have a minimum dimension of zero. 6. An assembled beam-column weak-axis connection node according to claim 5, characterized in that the dimensions of the first steel plate (9), the second steel plate (10) and the third steel plate (11) include the length of the steel plate Side Size, Short Side Size, or Thickness. 7. An assembled beam-column weak-axis connection node according to claim 1, characterized in that, several shear connectors (5) are provided between the concrete slab (12) and the I-beam (2), The upper end of the shear connecting piece (5) extends into the concrete slab (12), and the lower end is fixedly connected with the upper flange of the I-shaped beam (2). 8. An assembled beam-column weak-axis connection node according to claim 7, characterized in that the plurality of shear connectors (5) are evenly distributed in two rows along the horizontal axis of the I-beam (2). 9. An assembled beam-column weak-axis connection node according to claim 1, wherein the concrete slab (12) comprises a concrete pouring body (3) and a slab reinforcement cage (4); 4) A plurality of longitudinal steel bars and a plurality of transverse steel bars are used to evenly bind and form, and the concrete pouring body (3) is wrapped on the outer side of the plate body reinforcement cage (4).

Images