CN216428562U - Assembled beam column weak axis connected node - Google Patents

Assembled beam column weak axis connected node Download PDF

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Publication number
CN216428562U
CN216428562U CN202122984517.7U CN202122984517U CN216428562U CN 216428562 U CN216428562 U CN 216428562U CN 202122984517 U CN202122984517 U CN 202122984517U CN 216428562 U CN216428562 U CN 216428562U
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China
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steel plate
shaped
column
node
stiffening rib
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CN202122984517.7U
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朱丽华
文太宏
王艺璇
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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Abstract

The utility model discloses an assembly type beam column weak axis connecting node, which comprises an I-shaped column, wherein one side or two sides of the I-shaped column are provided with stiffening rib groups, and each stiffening rib group comprises two stiffening ribs; the two stiffening ribs are arranged between flanges in the direction of the weak axis of the I-shaped column in an up-down parallel mode; the beam end of the I-shaped beam is positioned between flanges of the I-shaped column in the direction of the weak axis and between two stiffening ribs of the stiffening rib group; the two node connecting piece groups are arranged at the nodes of the I-shaped beam and the I-shaped column and symmetrically arranged at two sides of a web plate of the I-shaped beam; each node connecting piece group comprises two node connecting pieces, and the node connecting pieces are fixedly connected with the I-shaped columns, the I-shaped beams and the stiffening ribs by high-strength bolts; the concrete slab is horizontally arranged on the surface of the upper flange of the I-shaped beam; the utility model discloses have good ductility and bearing capacity, effectively improved beam column weak axis connected node's deformability and anti-seismic performance, simple structure, the construction degree of difficulty is little.

Description

Assembled beam column weak axis connected node
Technical Field
The utility model belongs to the technical field of building engineering, in particular to assembled beam column weak axis connected node.
Background
The assembled steel structure has the advantages of suitability for industrial production, higher recovery rate of garbage and waste materials, lighter components, suitability for transportation and assembly, convenience for installation and disassembly and the like; therefore, countries with mature building industrialization mostly adopt the fabricated steel structure to develop the building industrialization. At present, the assembly type steel structure industry faces some problems, such as the incompleteness of an assembly type industrial chain; a node which is simple, convenient and rapid to assemble is lacked; less bolt connection is adopted, the field welding amount is large, and the quality is difficult to guarantee.
Although the welding rigid node is widely used in steel frames and combined frames due to the advantages of high bearing capacity, high rigidity, simple structure and the like; however, in an earthquake, a large number of welded steel nodes designed and constructed according to specifications are subjected to unexpected brittle failure; the existing beam-column weak axis connection mostly adopts the welding of the flange of the beam and the web of the column; because the width of the flange of the beam is usually smaller than that of the web of the column, the plastic yield of the beam appears on the web of the column instead of the beam end under the action of external force, so that the position of the plastic hinge is changed; or the web or the flange of the column is partially buckled and damaged, so that the seismic performance of the node is greatly reduced; at present, stiffening ribs are arranged between beam columns, the beam columns are welded and fixed by the stiffening ribs, but a large amount of seam welding is introduced, the welding workload is large, and the quality of the welding seam is not easy to guarantee; particularly, the weld joint position is easy to generate stress concentration to cause brittle failure, and the deformation capability is poor; in addition, the weak axis connection of the beam column is limited by the column flange to the space, the installation difficulty is high, and the connection structure design is complex.
SUMMERY OF THE UTILITY MODEL
To the technical problem who exists among the prior art, the utility model provides an assembled beam column weak axis connected node to solve current beam column weak axis connected node deformability poor, anti-seismic performance low, the big technical problem of the construction degree of difficulty.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model provides an assembly type beam column weak axis connecting node, which comprises an I-shaped column, an I-shaped beam, two node connecting piece sets and a concrete slab; one side or two sides of the I-shaped column are provided with stiffening rib groups, and the stiffening rib groups are arranged in the direction of the weak axis of the I-shaped column; each stiffening rib group comprises two stiffening ribs; the two stiffening ribs are arranged between flanges in the direction of the weak axis of the I-shaped column in an up-down parallel mode;
the I-shaped beam is horizontally arranged on one side or two sides of the I-shaped column, and the beam end of the I-shaped beam is positioned between flanges of the I-shaped column in the direction of the weak axis and between two stiffening ribs of the stiffening rib group;
the two node connecting piece groups are arranged at the nodes of the I-shaped beam and the I-shaped column and symmetrically arranged at two sides of a web plate of the I-shaped beam; each node connecting piece group comprises two node connecting pieces, and the two node connecting pieces are positioned on the same side of a web plate of the I-shaped beam and are arranged in an up-and-down symmetrical mode along the horizontal axis of the I-shaped beam; the node connecting piece is fixedly connected with the I-shaped column, the I-shaped beam and the stiffening rib by adopting high-strength bolts;
the concrete slab is horizontally arranged on the surface of the upper flange 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 part of the concrete slab is tightly contacted with the outer surface of the I-shaped column.
Furthermore, one end of a stiffening rib is fixedly connected with a web plate of the I-shaped column, two sides of the stiffening rib are fixedly connected with flanges at two sides of the I-shaped column, and the other end of the stiffening rib is tightly contacted with the outer surface of an upper flange or a lower flange of the I-shaped beam;
in the same stiffening rib group, one stiffening rib is fixedly connected with the upper flange of the I-shaped beam and one node connecting piece through a high-strength bolt; the other stiffening rib is fixedly connected with the lower flange of the I-shaped beam and the other node connecting piece through a high-strength bolt; the end part of the node connecting piece is fixedly connected with the web plate of the I-shaped column through a high-strength bolt.
Furthermore, the node connecting piece comprises a first steel plate, a second steel plate and a third steel plate; the first steel plate is vertically arranged, and the second steel plate is horizontally arranged; the first steel plate and the second steel plate are vertically fixed to form an L-shaped connecting structure; the third steel plate is vertically arranged at the end part of the L-shaped connecting node and is close to the web plate of the I-shaped column;
the first steel plate is fixedly connected with a web plate of the I-shaped beam through a high-strength bolt; the second steel plate is fixedly connected with the upper flange or the lower flange of the I-shaped beam and one of the stiffening ribs through a high-strength bolt; the third steel plate is fixedly connected with the web plate of the I-shaped column through a high-strength bolt.
Furthermore, the first steel plate and the second steel plate are fixed by welding or are in an integrated forming structure; and the third steel plate and the first steel plate or the second steel plate are fixed by welding or are in an integral forming structure.
Furthermore, the sizes of the first steel plate, the second steel plate and the third steel plate in the same node connecting piece are mutually independent; the minimum size of the first steel plate, the second steel plate and the third steel plate is zero, and the minimum size of at most one steel plate in the first steel plate, the second steel plate and the third steel plate is zero.
Further, the sizes of the first steel plate, the second steel plate and the third steel plate include a long side size, a short side size or a thickness of the steel plates.
Furthermore, a plurality of shear connectors are arranged between the concrete slab and the I-shaped beam, the upper ends of the shear connectors extend into the concrete slab, and the lower ends of the shear connectors are fixedly connected with the upper flange of the I-shaped beam.
Furthermore, the plurality of shear connectors are uniformly distributed in two rows along the horizontal axis of the I-shaped beam.
Further, the concrete slab comprises a concrete casting body and a slab body reinforcement cage; the plate body steel reinforcement cage is formed by uniformly binding a plurality of longitudinal steel reinforcements and a plurality of transverse steel reinforcements, and the concrete casting body is wrapped on the outer side of the plate body steel reinforcement cage.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides an assembly type beam-column weak axis connection node, which is characterized in that a stiffening rib is arranged 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 a node connecting piece is arranged between the I-shaped beam and the I-shaped column; the node connecting pieces are symmetrically arranged in pairs, the I-shaped beams, the I-shaped columns, the node connecting pieces and the stiffening ribs are fixedly connected through high-strength bolts, and semi-rigid bolt connecting nodes are formed at the beam column weak axis connecting nodes; the semi-rigid bolt is adopted for connecting the nodes, so that the deformation and stress performance of the nodes are between complete rigidity and ideal hinging, and the high bearing capacity of the rigid nodes is realized, and the rotation capacity of the hinging point is also realized; under the action of external force, the steel plate has certain rotation capacity, dissipates energy through deformation, and has good ductility and bearing capacity; meanwhile, the flange of the I-shaped beam is prevented from being directly connected with the web of the I-shaped column, the position generated by the plastic hinge is far away from the direction of the web of the I-shaped column, a large number of welding seams are avoided by connecting the high-strength bolt with the stiffening rib, the rotation capacity and energy consumption capacity are improved, the welding seams are effectively prevented from being damaged due to brittleness caused by quality problems, the deformation capacity and the anti-seismic performance of the beam-column weak-axis connection node are effectively improved, the structure is simple, and the construction difficulty is small.
Furthermore, the stiffening rib is fixed with the web plate and the flange of the I-shaped column and is in close contact with the outer surface of the flange of the I-shaped beam, the stiffening rib, the I-shaped column, the I-shaped beam and the node connecting piece are fixed by the high-strength bolt, the stiffening rib can ensure that the part of the component is stable and the load is transferred, and the stability and the torsion resistance of the component can be improved. The stiffeners are suitably arranged in pairs on either side of the web, or may be arranged on one side.
Furthermore, the sizes of the first steel plate, the second steel plate and the third steel plate in the same node connecting piece are mutually independent, the size and the form of the node connecting piece are selected according to the position of a node, the type of a beam and the stress condition of a member, and the second steel plate, the third steel plate and the first steel plate with the larger size or the first steel plate with the smaller size can be adopted or the first steel plate is not arranged under the condition of larger bending moment and smaller shearing force; under the condition of smaller bending moment and larger shearing force, a first steel plate with larger size, a third steel plate and a second steel plate with smaller size can be adopted or the second steel plate is not arranged; the bending moment is resisted by the high-strength bolt of the third steel plate in a tension mode, the friction between the second steel plate and the upper and lower flanges of the I-shaped beam and the shearing of the high-strength bolt, and the shearing 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 plate of the I-shaped beam and the shearing of the corresponding high-strength bolt; under the condition of large bending moment and shearing force, three steel plates act together to resist the bending moment and the shearing force; the node connecting piece is simple in form, short in seam welding length and small in number, and is convenient for batch production of a factory assembly line; the node connecting piece is arranged on the inner side of the flange of the I-shaped beam, so that the space utilization rate of the node is guaranteed to a great extent.
Furthermore, a shear-resistant connecting piece is arranged between the concrete slab and the I-shaped beam, and the shear-resistant connecting piece can resist longitudinal shear between the concrete slab and the I-shaped beam, so that the concrete slab and the I-shaped beam cannot freely slide, and common stress and deformation coordination are achieved; meanwhile, the lifting force between the concrete slab and the I-shaped beam can be resisted.
Drawings
FIG. 1 is a schematic overall structure diagram of an assembled beam-column weak axis connection node according to an embodiment;
FIG. 2 is a schematic elevation structure view of an assembled beam-column weak axis connection node according to an embodiment;
FIG. 3 is a schematic sectional view taken along line A-A of the weak axis connection node of the fabricated beam column according to the embodiment;
FIG. 4 is a side view of a beam slab in an assembled beam-column weak axis connection node according to an embodiment;
FIG. 5 is an elevation view of a beam slab node in an assembled beam-column weak axis connection node according to an embodiment;
FIG. 6 is a schematic structural diagram of a joint connecting member of the fabricated beam-column weak axis connecting joint according to the embodiment;
fig. 7 is an explosion effect diagram of the assembled beam-column weak axis connection node according to the embodiment.
The concrete slab comprises 1I-shaped column, 2I-shaped beam, 3 concrete casting bodies, 4 plate body reinforcement cages, 5 shear connectors, 6 node connectors, 7 high-strength bolts, 8 stiffening ribs, 9 first steel plates, 10 second steel plates, 11 third steel plates and 12 concrete plates.
Detailed Description
In order to make the technical problem solved by the present invention, technical solution and beneficial effect are more clearly understood, and the following specific embodiments are right for the present invention to proceed further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model provides an assembled beam column weak axis connected node, including I-shaped post 1, I-shaped roof beam 2, a plurality of shear connector 5, two nodal connection piece groups, a plurality of high strength bolt 7, stiffening rib group and concrete slab 12.
The I-shaped column 1 is vertically arranged, and one side or two sides of the I-shaped column 1 are provided with stiffening rib groups; wherein, the stiffening rib group is arranged in the direction of the weak axis of the I-shaped column 1; each stiffener group comprises two stiffeners 8; the two stiffening ribs 8 are arranged between flanges of the I-shaped column 1 in the direction of the weak axis in an up-down parallel manner.
The I-shaped beam 2 is horizontally arranged on one side or two sides of the I-shaped column 1, and the beam end of the I-shaped beam 2 is positioned between flanges of the I-shaped column 1 in the direction of the weak axis and between two stiffening ribs 8 of the stiffening rib group; one end of a stiffening rib 8 is fixedly connected with a web plate of the I-shaped column 1, two sides of the stiffening rib 8 are fixedly connected with flanges at two sides of the I-shaped column 1, and the other end of the stiffening rib 8 is tightly contacted with the outer surface of an upper flange or a lower flange of the I-shaped beam 2; in the same stiffening rib group, one stiffening rib 8 is fixedly connected with the upper flange of the I-shaped beam 2 and one node connecting piece 6 through a high-strength bolt 7; the other stiffening rib 8 is fixedly connected with the lower flange of the I-shaped beam 2 and the other node connecting piece 6 through a high-strength bolt; the end part of the node connecting piece 6 is fixedly connected with the web plate of the I-shaped column 1 through a high-strength bolt 7.
The two node connecting piece groups are arranged at the nodes of the I-shaped beam 2 and the I-shaped column 1 and symmetrically arranged at two sides of a web plate of the I-shaped beam 2; each node connecting piece group comprises two node connecting pieces 6, and the two node connecting pieces 6 are positioned on the same side of the web plate of the I-shaped beam 2 and are arranged up and down symmetrically along the horizontal axis of the I-shaped beam 2; the node connecting piece 6 is fixedly connected with the I-shaped column 1, the I-shaped beam 2 and the stiffening rib 8 by high-strength bolts 7.
The node connecting piece 6 comprises a first steel plate 9, a second steel plate 10 and a third steel plate 11; the first steel plate 9 is vertically arranged, and the second steel plate 10 is horizontally arranged; the first steel plate 9 and the second steel plate 10 are vertically fixed to form an L-shaped connecting structure; the third steel plate 11 is vertically arranged at the end part of the L-shaped connecting node and is close to the web plate of the I-shaped column 1;
the first steel plate 9 is fixedly connected with a web plate of the I-shaped beam 2 through a high-strength bolt 7; the second steel plate 10 is fixedly connected with the upper flange or the lower flange of the I-shaped beam 2 and one stiffening rib 8 through a high-strength bolt 7; the third steel plate 11 is fixedly connected with the web plate of the I-shaped column 1 through a high-strength bolt 7.
In the utility model, a welding fixing or integral forming structure is adopted between the first steel plate 9 and the second steel plate 10; the third steel plate 11 and the first steel plate 9 or the second steel plate 10 are fixed by welding or are in an integral forming structure; the sizes of the first steel plate 9, the second steel plate 10 and the third steel plate 11 in the same node connecting piece 6 are independent; wherein the minimum dimension of the first steel plate 9, the second steel plate 10 and the third steel plate 11 is zero, and the minimum dimension 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; the dimensions of the first steel plate 9, the second steel plate 10, and the third steel plate 11 include the long side dimension, the short side dimension, or the thickness of the steel plates.
The concrete slab 12 is horizontally arranged on the surface of the upper flange 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 part of the concrete slab 12 is tightly contacted with the outer surface of the I-shaped column 1. A plurality of shear connectors 5 are arranged between the concrete slab 12 and the I-shaped beam 2, the upper ends of the shear connectors 5 extend into the concrete slab 12, and the lower ends are fixedly connected with the upper flange of the I-shaped beam 2; the plurality of shear connectors 5 are uniformly distributed in two rows along the horizontal axis of the I-shaped beam 2; the concrete slab 12 comprises a concrete casting body 3 and a slab reinforcement cage 4; the plate body steel reinforcement cage 4 is formed by uniformly binding a plurality of longitudinal steel reinforcements and a plurality of transverse steel reinforcements, and the concrete casting body 3 is wrapped on the outer side of the plate body steel reinforcement cage 4.
The construction method of the assembly type beam column weak axis connecting node comprises the following steps:
step 1, processing and manufacturing an I-shaped column 1, an I-shaped beam 2 and a node connecting piece 6 according to design requirements; and a stiffening rib group is arranged on one side or two sides of the I-shaped beam 2;
step 2, installing the I-shaped column 1, hoisting the I-shaped beam 2 to a preset installation position, and ensuring that the beam end of the I-shaped beam 2 is positioned between two stiffening ribs 8 of the stiffening rib group;
step 3, fixedly connecting the node connecting piece 6 with the I-shaped beam 2, the I-shaped column 1 and the stiffening rib 8 by using a high-strength bolt 7 so as to fixedly connect the I-shaped beam 2 with the I-shaped column 1 together;
and 4, casting a concrete slab 12 on the surface of the upper flange of the I-shaped beam 2 in situ.
Principle of operation or force
The assembled beam column weak axis connecting node of the utility model is characterized in that the stiffening ribs are arranged 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 ribs in the weak axis direction of the I-shaped column, and a node connecting piece is arranged between the I-shaped beam and the I-shaped column; the node connecting pieces are symmetrically arranged in pairs, the I-shaped beams, the I-shaped columns, the node connecting pieces and the stiffening ribs are fixedly connected through high-strength bolts, and semi-rigid bolt connecting nodes are formed at the beam column weak axis connecting nodes; the deformation and stress performance of the semi-rigid bolt connection node is between complete rigidity and ideal hinging; therefore, the high bearing capacity of the rigid node also has the rotation capacity of a hinge point; under the action of external force, the steel plate has certain rotation capacity, dissipates energy through deformation, and has good ductility and bearing capacity.
In the utility model, the node plastic hinge can be prevented from appearing on the web plate of the I-shaped column under the condition of ensuring the good stress performance of semi-rigid connection; meanwhile, the number of welding seams in the areas of the stiffening ribs and the node connecting pieces is small, the length of the welding seams is short, the residual stress of a heat affected zone is greatly reduced, the mechanical property of the joint connecting piece is easily guaranteed, and the joint connecting piece is not easy to be fragile and damaged under the action of external force; the connecting piece has simple form and less components; the node connecting piece can be formed by welding only one short welding line by bending an L-shaped steel plate twice, or formed by welding angle steel and one steel plate, or formed by welding three steel plates, has various forms and is convenient for batch production of a factory assembly line; meanwhile, the node connecting pieces are uniformly distributed on the inner side of the beam flange, so that the space utilization rate of the nodes is guaranteed to a great extent.
Examples
As shown in fig. 1-7, two i-shaped beams 2, i.e., cross nodes, are symmetrically arranged on two sides of the i-shaped column 1 in the direction of the weak axis; the embodiment provides an assembly type beam-column weak axis connecting node which comprises an I-shaped column 1, two I-shaped beams 2, a plurality of shear connectors 5, four node connector groups, a plurality of high-strength bolts 7, two stiffening rib groups and a concrete slab 12.
The I-shaped column 1 is vertically arranged, and stiffening rib groups are respectively arranged on two 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 comprises two stiffening ribs 8, and the two stiffening ribs 8 are arranged between flanges of the I-shaped column 1 in the weak axis direction in an up-down parallel manner; the two I-shaped beams 2 are horizontally arranged on two sides of the I-shaped column 1, and the beam ends of the I-shaped beams 2 are positioned between flanges of the I-shaped column 1 in the direction of the weak axis and between two stiffening ribs 8 of the stiffening rib group; two node connecting piece sets are arranged between one I-shaped beam 2 and the I-shaped column 1, and two node connecting piece sets are arranged between the other I-shaped beam 2 and the I-shaped column 1.
In this embodiment, the joint connection structure between the two i-shaped beams 2 and the i-shaped column 1 is the same, and the joint connection structure between one of the i-shaped beams 2 and the i-shaped column 1 is taken as an example to be described in detail below.
The two node connecting piece groups are arranged at the nodes of the I-shaped beam 2 and the I-shaped column 1 and symmetrically arranged at two sides of a web plate of the I-shaped beam 2; each node connecting piece group comprises two node connecting pieces 6, and the two node connecting pieces 6 are positioned on the same side of the web plate of the I-shaped beam 2 and are arranged up and down symmetrically along the horizontal axis of the I-shaped beam 2; the node connecting piece 6 is fixedly connected with the I-shaped column 1, the I-shaped beam 2 and the stiffening rib 8 by high-strength bolts 7.
One end of a stiffening rib 8 is fixedly connected with a web plate of the I-shaped column 1, two sides of the stiffening rib 8 are fixedly connected with flanges at two sides of the I-shaped column 1, and the other end of the stiffening rib 8 is tightly contacted with the outer surface of an upper flange or a lower flange of the I-shaped beam 2; in the same stiffening rib group, one stiffening rib 8 is fixedly connected with the upper flange of the I-shaped beam 2 and one node connecting piece 6 through a high-strength bolt 7; the other stiffening rib 8 is fixedly connected with the lower flange of the I-shaped beam 2 and the other node connecting piece 6 through a high-strength bolt; the end part of the node connecting piece 6 is fixedly connected with the web plate of the I-shaped column 1 through a high-strength bolt 7.
The node connecting piece 6 comprises a first steel plate 9, a second steel plate 10 and a third steel plate 11; the first steel plate 9 is vertically arranged, and the second steel plate 10 is horizontally arranged; the first steel plate 9 and the second steel plate 10 are vertically fixed to form an L-shaped connecting structure; the third steel plate 11 is vertically arranged at the end part of the L-shaped connecting node and is close to the web plate of the I-shaped column 1;
the first steel plate 9 is closely attached to the web plate of the I-shaped beam 2, and the first steel plate 9 is fixedly connected with the web plate of the I-shaped beam 2 through a high-strength bolt 7; the second steel plate 10 is closely attached to the upper flange or the lower flange of the I-shaped beam 2, and the second steel plate 10 is fixedly connected with the upper flange or the lower flange of the I-shaped beam 2 and one stiffening rib 8 through a high-strength bolt 7; the third steel plate 11 is in close contact with the web plate of the I-shaped column 1, and the third steel plate 11 is fixedly connected with the web plate of the I-shaped column 1 through a high-strength bolt 7.
In this embodiment, 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 fixed by welding or are in an integral forming structure; the sizes of the first steel plate 9, the second steel plate 10 and the third steel plate 11 in the same node connecting piece 6 are independent; wherein the minimum dimension of the first steel plate 9, the second steel plate 10 and the third steel plate 11 is zero, and the minimum dimension 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; the dimensions of the first steel plate 9, the second steel plate 10, and the third steel plate 11 include the long side dimension, the short side dimension, or the thickness of the steel plates.
In the embodiment, in the node connecting piece 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 condition and the size of a component of an actual project under the condition of meeting the national industry standard requirements; the first steel plate 9, the second steel plate 10 and the third steel plate 11 are provided with at least one bolt hole, and the number of the bolt holes and the distance between adjacent bolt holes are calculated and meet the current steel structure standard requirements.
In the embodiment, the node connecting piece 6 is simple in form and small in number of components; the node connecting piece 6 can be formed by welding only one short welding line through twice bending of one L-shaped steel plate, or formed by welding angle steel and one steel plate, or formed by welding three steel plates, is various in form and is convenient for batch production of a factory assembly line.
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 connecting piece are independent from each other, and according to the position of the node, for example: a cross node or an edge node; or beam types, such as: the main beam, the secondary beam or the main and secondary beams are connected; or the size and the form of each steel plate in the node connecting piece are selected according to the stress condition of the member; under the condition of large bending moment and small shearing force, a second steel plate 10 and a third steel plate 11 with larger sizes and a first steel plate 9 with smaller sizes can be adopted or the first steel plate 9 is not arranged; under the conditions of smaller bending moment and larger shearing force, a first steel plate 9 and a third steel plate 11 with larger sizes and a second steel plate 10 with smaller sizes can be adopted or the second steel plate 10 is not arranged; the bending moment is resisted by tension of the high-strength bolt 7 of the third steel plate 11, friction between the second steel plate 10 and the upper and lower flanges of the I-shaped beam 2 and shearing of the high-strength bolt 7, and the shearing force is resisted by the friction between the third steel plate 11 and the flange in the direction of the strong axis of the I-shaped column 1 and the first steel plate 9 and the web plate of the I-shaped beam 2 and the shearing of the corresponding high-strength bolt 7; under the condition that the bending moment and the shearing force at the connecting joint are large, the first steel plate 9, the second steel plate 10 and the third steel plate 11 are arranged and jointly act to resist the bending moment and the shearing force.
The concrete slab 12 is horizontally arranged on the surface of the upper flange 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 part of the concrete slab 12 is tightly contacted with the outer surface of the I-shaped column 1; a plurality of shear connectors 5 are arranged between the concrete slab 12 and the I-shaped beam 2, the upper ends of the shear connectors 5 extend into the concrete slab 12, and the lower ends are fixedly connected with the upper flange of the I-shaped beam 2; the plurality of shear connectors 5 are uniformly distributed in two rows along the horizontal axis of the I-shaped beam 2; the concrete slab 12 comprises a concrete casting body 3 and a slab reinforcement cage 4; the plate body steel reinforcement cage 4 is formed by uniformly binding a plurality of longitudinal steel reinforcements and a plurality of transverse steel reinforcements, and the concrete casting body 3 is wrapped on the outer side of the plate body steel reinforcement cage 4.
In the embodiment, the node connecting pieces 6 are arranged in pairs, and are divided into two pairs, each pair is composed of two node connecting pieces 6, and the first pair is arranged on the inner side of the flange on one side of the I-shaped beam 2 with the shear connecting piece 5 and on two sides of the corresponding web; wherein, the pair of first steel plates 9 is connected with the web of the I-shaped beam 2 having one side of the shear connector 5, and the pair of second steel plates 10 is connected with the inner side of the flange of the I-shaped beam 2 having one side of the shear connector 5; the second pair of the flanges is arranged on the inner side of the flange on one side of the I-shaped beam 2 far away from the shear connector 5 and on two sides of the corresponding web plate; the pair of first steel plates 9 are connected with webs of the I-shaped beam 2 far away from one side of the shear connector 5, and the pair of second steel plates 10 are connected with the inner sides of flanges of the I-shaped beam 2 far away from one side of the shear connector 5; and the third steel plates in the two pairs of node connections 6 are fixedly connected with the web plate of the I-shaped column 1.
The construction process comprises the following steps:
in a factory, I-shaped beams 2 and I-shaped columns 1 are prefabricated and bolt holes are formed; wherein, the shear connector 5 on the I-shaped beam 2 and the stiffening rib 8 in the weak axis direction of the I-shaped column 1 are also prefabricated and assembled in place in a factory and then transported to a construction site; the I-shaped beam 2 is connected with the I-shaped column 1 through a node connecting piece 6 and a high-strength bolt 7; finally, the concrete slab 12 is bound by the worker on site with the slab reinforcement cage 44 and the concrete cast 3 is constructed.
In the fabricated beam-column weak axis connection node of the embodiment, the stiffening ribs are arranged in the weak axis direction of the I-shaped column, the beam end of the I-shaped beam is tightly contacted with the stiffening ribs in the weak axis direction of the I-shaped column, and a node connecting piece is arranged between the I-shaped beam and the I-shaped column; the node connecting pieces are symmetrically arranged in pairs, the I-shaped beams, the I-shaped columns, the node connecting pieces and the stiffening ribs are fixedly connected through high-strength bolts, and semi-rigid bolt connecting nodes are formed at the beam column weak axis connecting nodes; the upper flange of the I-shaped beam is provided with double rows of shear connectors; the concrete slab comprises a concrete casting body and a plate body reinforcement cage, and is formed by casting in situ through the concrete casting body, the beam column connecting node is simple in structure, convenient to construct and use, and has stronger deformability, clear stress, strong bearing capacity and stronger energy dissipation capacity, and can be applied to a standardized assembly type steel frame combined structure.
In the utility model, the beam column weak axis connection node is set as a semi-rigid bolt connection node, and the deformation and the stress performance of the semi-rigid bolt connection are between complete rigidity and ideal articulation; therefore, the high bearing capacity of the rigid node also has the rotation capacity of a hinge point; under the action of external force, the steel plate has certain rotation capacity, dissipates energy through deformation, and has good ductility and bearing capacity; under the condition of ensuring good stress performance of semi-rigid connection, the problem that node plastic hinge appears in a column web plate is avoided; meanwhile, the welding seam of the connecting area of the stiffening rib and the node connecting piece is short, the existence of the residual stress of a heat affected zone is greatly reduced, the mechanical property of the connecting area is easily ensured, and the connecting area is not easy to be subjected to brittle failure under the action of external force.
The embodiment described above is only one of the embodiments that can realize the technical solution of the present invention, and the scope of the present invention is not limited only by the embodiment, but also includes any variations, substitutions and other embodiments that can be easily conceived by those skilled in the art within the technical scope of the present invention.

Claims (9)

1. The assembly type beam-column weak shaft connecting node is characterized by comprising an I-shaped column (1), an I-shaped beam (2), two node connecting piece groups and a concrete slab (12); one side or two sides of the I-shaped column (1) are provided with stiffening rib groups, and the stiffening rib groups are arranged in the weak axis direction of the I-shaped column (1); each stiffener group comprises two stiffeners (8); the two stiffening ribs (8) are arranged between flanges of the I-shaped column (1) in the direction of the weak axis in parallel up and down;
the I-shaped beam (2) is horizontally arranged on one side or two sides of the I-shaped column (1), and the beam end of the I-shaped beam (2) is positioned between flanges of the I-shaped column (1) in the direction of the weak axis and between two stiffening ribs (8) of a stiffening rib group;
the two node connecting piece groups are arranged at the nodes of the I-shaped beam (2) and the I-shaped column (1) and symmetrically arranged at two sides of a web plate of the I-shaped beam (2); each node connecting piece group comprises two node connecting pieces (6), and the two node connecting pieces (6) are positioned on the same side of a web plate of the I-shaped beam (2) and are arranged up and down symmetrically along the horizontal axis of the I-shaped beam (2); the node connecting piece (6) is fixedly connected with the I-shaped column (1), the I-shaped beam (2) and the stiffening rib (8) by high-strength bolts (7);
the concrete slab (12) is horizontally arranged on the surface of the upper flange 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 part of the concrete slab (12) is tightly contacted with the outer surface of the I-shaped column (1).
2. The assembly type beam-column weak axis connection node as claimed in claim 1, wherein one end of the stiffening rib (8) is fixedly connected with the web of the I-shaped column (1), two sides of the stiffening rib (8) are fixedly connected with flanges at two sides of the I-shaped column (1), and the other end of the stiffening rib (8) is tightly contacted with the outer surface of the upper flange or the lower flange of the I-shaped beam (2);
in the same stiffening rib group, one stiffening rib (8) is fixedly connected with the upper flange of the I-shaped beam (2) and one node connecting piece (6) through a high-strength bolt (7); the other stiffening rib (8) is fixedly connected with the lower flange of the I-shaped beam (2) and the other node connecting piece (6) through a high-strength bolt; the end part of the node connecting piece (6) is fixedly connected with the web plate of the I-shaped column (1) through a high-strength bolt (7).
3. The assembly type beam-column weak axis connecting joint according to claim 1, wherein the joint connecting piece (6) comprises a first steel plate (9), a second steel plate (10) and a third steel plate (11); the first steel plate (9) is vertically arranged, and the second steel plate (10) is horizontally arranged; the first steel plate (9) and the second steel plate (10) are vertically fixed to form an L-shaped connecting structure; the third steel plate (11) is vertically arranged at the end part of the L-shaped connecting node and is close to the web plate of the I-shaped column (1);
the first steel plate (9) is fixedly connected with a web plate of the I-shaped beam (2) through a high-strength bolt (7); the second steel plate (10) is fixedly connected with the upper flange or the lower flange of the I-shaped beam (2) and one stiffening rib (8) through a high-strength bolt (7); the third steel plate (11) is fixedly connected with the web plate of the I-shaped column (1) through a high-strength bolt (7).
4. The assembly type beam-column weak axis connecting joint according to claim 3, characterized in that a welding fixing or an integral molding structure is adopted between the first steel plate (9) and the second steel plate (10); the third steel plate (11) and the first steel plate (9) or the second steel plate (10) are fixed by welding or are in an integrated forming structure.
5. The assembly type beam-column weak axis connecting joint according to claim 3, wherein the first steel plate (9), the second steel plate (10) and the third steel plate (11) in the same joint connecting piece (6) are independent in size; wherein the minimum dimension of the first steel plate (9), the second steel plate (10) and the third steel plate (11) is zero, and the minimum dimension of at most one of the first steel plate (9), the second steel plate (10) and the third steel plate (11) is zero.
6. The assembly type beam-column weak axis connecting node according to claim 5, wherein the sizes of the first steel plate (9), the second steel plate (10) and the third steel plate (11) comprise the long side size, the short side size or the thickness of the steel plates.
7. The assembly type beam-column weak axis connection node as claimed in claim 1, wherein a plurality of shear connectors (5) are arranged between the concrete slab (12) and the I-shaped beam (2), the upper ends of the shear connectors (5) extend into the concrete slab (12), and the lower ends are fixedly connected with the upper flange of the I-shaped beam (2).
8. An assembled beam-column weak axis connection node as claimed in claim 7, wherein a plurality of shear connectors (5) are uniformly distributed in two rows along the horizontal axis of the I-shaped beam (2).
9. The fabricated beam-column weak axis connection node as claimed in claim 1, wherein the concrete slab (12) comprises a concrete casting (3) and a slab reinforcement cage (4); the plate body reinforcement cage (4) is formed by uniformly binding a plurality of longitudinal reinforcements and a plurality of transverse reinforcements, and the concrete casting body (3) is wrapped on the outer side of the plate body reinforcement cage (4).
CN202122984517.7U 2021-11-30 2021-11-30 Assembled beam column weak axis connected node Active CN216428562U (en)

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CN202122984517.7U CN216428562U (en) 2021-11-30 2021-11-30 Assembled beam column weak axis connected node

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Application Number Priority Date Filing Date Title
CN202122984517.7U CN216428562U (en) 2021-11-30 2021-11-30 Assembled beam column weak axis connected node

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CN216428562U true CN216428562U (en) 2022-05-03

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