CN113638497A - Bolt connection node of outer ring plate of square steel tube concrete column-steel beam - Google Patents
Bolt connection node of outer ring plate of square steel tube concrete column-steel beam Download PDFInfo
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- CN113638497A CN113638497A CN202110968836.0A CN202110968836A CN113638497A CN 113638497 A CN113638497 A CN 113638497A CN 202110968836 A CN202110968836 A CN 202110968836A CN 113638497 A CN113638497 A CN 113638497A
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- outer ring
- ring plate
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/185—Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/36—Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials
Abstract
The invention discloses a bolt connection node of a square steel tube concrete column and a steel beam outer ring plate, which relates to the technical field of steel structure buildings and comprises a CFRP circular tube, wherein the CFRP circular tube is arranged in a square steel tube; the lower outer ring plate is parallel to the upper outer ring plate, and a lower positioning hole is formed in the position, corresponding to the upper positioning hole, of the lower outer ring plate; two shear webs connecting the upper outer ring plate and the lower outer ring plate; two steel beams are H steel; wherein, both sides of the upper outer ring plate and both sides of the lower outer ring plate are respectively detachably connected with the two steel beams through connecting plates; the node has good rotation capacity, ductility and seismic resistance; when the node is damaged, plastic hinges appear on the replaceable connecting plate first, so that the upper outer ring plate, the lower outer ring plate and the steel pipe are ensured not to generate severe plastic deformation; the nodes can be quickly repaired after the earthquake by replacing the connecting plates and the bolts, and the repaired nodes still have higher energy dissipation capacity; the node repairing work is simple, and good economic benefits can be brought.
Description
Technical Field
The invention belongs to the technical field of steel structure buildings, and particularly relates to a bolt connection node of a square steel tube concrete column and a steel beam outer ring plate.
Background
In northern mountain earthquake of California in 1994 and in Sakashen earthquake of Japan in 1995, the high-rise building structural system shows good earthquake-resistant performance, and the steel pipe concrete structural system is more subjected to severe tests of resisting the earthquake. Most of the structures without collapse are of steel pipe concrete structure. Therefore, the safety performance and the collapse resistance of the steel pipe concrete structure system are fully verified in the earthquake. But more severe damage occurs at the local beam column node. Therefore, the research on the steel pipe concrete structure beam column node is particularly important at present; the development of a new form of the beam-column node and the improvement of the stress performance of the beam-column node are important points of future research work, and the method has remarkable significance in both practical and theoretical aspects.
In the research of beam column nodes, whether the stress performance is reasonable is one of the key problems in the structural system. The node mainly has the effect that bending moment and shearing force of the beam end are transmitted to the column, and the node is safe and reliable and can ensure normal work of a system. The design concept of 'strong columns, weak beams and strong node and weak members' provided in the seismic standard fully explains the important position of the node in the structural seismic design. In addition, the construction of the node is also a difficult point, and the traditional welding technology adopted by the steel pipe concrete structure causes large on-site welding workload, high construction difficulty and low installation efficiency of the node. Therefore, the reasonable node form is selected, and the method has important value for popularization and promotion of the steel pipe concrete structure.
Disclosure of Invention
The invention aims to solve the technical problem of providing a square concrete-filled steel tubular column-steel beam outer ring plate bolt connection node so as to solve the problems of large on-site welding workload, high construction difficulty and low node installation efficiency caused by the traditional welding technology adopted by a concrete-filled steel tubular structure in the prior art described in the background technology.
In order to solve the above problems, the present invention provides the following technical solutions: a bolt connection node of a square steel tube concrete column and a steel beam outer ring plate comprises
The CFRP circular tube is arranged in the square steel tube;
the upper outer ring plate is provided with an upper positioning hole;
the lower outer ring plate is parallel to the upper outer ring plate, a lower positioning hole is formed in the position, corresponding to the upper positioning hole, of the lower outer ring plate, and the square steel pipe penetrates through and is connected with the upper positioning hole and the lower positioning hole;
the two shear webs are connected with the upper outer ring plate and the lower outer ring plate and are respectively positioned on two opposite sides of the square steel pipe;
the two steel beams are H steel and are respectively arranged on two opposite sides of the square steel tube;
wherein, the both sides of this upper portion outer ring plate, the both sides of lower part outer ring plate are connected with two girder steels can be dismantled through connecting plate respectively.
Preferably: and a concrete column is arranged between the inner wall of the square steel tube and the outer wall of the CFRP circular tube.
Preferably: the CFRP circular pipe is a double-layer pipe, the thickness of each layer is 0.167mm, the inner diameter of the CFRP circular pipe is 0.5-0.7 times of the section of the square steel pipe, and the height of the CFRP circular pipe is the same as that of the square steel pipe.
Preferably: the length of the cross section of the upper outer ring plate and the lower outer ring plate is 1-1.2 times of the length of the steel beam, the width of the cross section of the square steel pipe is 1.4-1.5 times of the width of the cross section of the square steel pipe, and the thickness of the cross section of the upper outer ring plate and the lower outer ring plate is the same as the thickness of the upper flange of the steel beam.
Preferably: the effective width of the cross section of the upper outer ring plate and the lower outer ring plate is larger than 0.5 times of the width of the square steel pipe.
Preferably: the connecting plate and the upper flange or the lower flange corresponding to the connecting plate and the upper outer ring plate or the lower outer ring plate are respectively provided with a plurality of bolt holes, the connecting plate is connected with the upper flange, the lower flange, the upper outer ring plate and the lower outer ring plate through bolts penetrating through the bolt holes, and the distance between the adjacent bolt holes is 60-80 mm.
Preferably: the length of the section of the connecting plate is five times of the distance of the bolt holes, the width of the connecting plate is the same as that of the upper flange or the lower flange, and the thickness of the connecting plate is the same as that of the upper flange or the lower flange.
Preferably: the shear web plate is connected with the upper outer ring plate, the lower outer ring plate, the square steel pipe, the upper outer ring plate and the lower outer ring plate in a welding mode.
Preferably: the welding seam of the welding mode is a double-sided fillet welding seam or a full penetration welding seam.
Preferably: the thickness of the steel beam web of the steel beam is the same as the thickness of the shear web.
The beneficial effect of adopting above technical scheme is:
(1) in the invention, the outer ring plate node is adopted, the plastic hinge appears on the replaceable connecting plate, and the repaired node has huge energy dissipation capacity, which shows that the node can be quickly repaired after the earthquake by replacing the connecting plate and the bolt;
(2) according to the invention, the bolt holes of the outer ring plate, the shear web plate and the outer ring plate and the bolt holes on the steel beam are completed in a factory and are assembled on a construction site, so that the operation time can be effectively reduced, and the working efficiency is improved;
(3) according to the invention, the upper outer ring plate and the lower outer ring plate can increase the integral rigidity of the node and improve the stability of the node; the initial rigidity and ductility of the upper and lower outer ring plate nodes adopting the welding mode are good, and the nodes have good rotation capacity and ductility; the thickness and the length of the upper outer ring plate and the lower outer ring plate are increased, so that the seismic performance of the node can be improved;
(4) according to the invention, the built-in CFRP circular tube enables the hysteresis curve of the node to be relatively full and the ductility to be improved, so that the energy consumption capability of the structure is effectively improved.
Drawings
FIG. 1 is a schematic structural view of a square steel tube concrete column-steel beam outer ring plate bolt connection node of the present invention.
Fig. 2 is a schematic structural view of a part of the present invention.
FIG. 3 is a schematic view showing the structure of the upper and lower outer ring plates according to the present invention.
Fig. 4 is a schematic structural view of the connection plate of the present invention.
FIG. 5 is a schematic view of the structure of the steel beam of the present invention.
FIG. 6 is a front view of a square steel tubular concrete column-steel beam outer ring plate bolt connection node according to the present invention.
FIG. 7 is a top view of a square steel tubular concrete column-steel beam outer ring plate bolted joint of the present invention.
FIG. 8 is a side view of a square steel tubular concrete column-steel beam outer ring plate bolted joint of the present invention.
Fig. 9 is a load-displacement hysteresis curve of the present invention.
Fig. 10 is an energy dissipation curve of the present invention.
Wherein: the steel pipe comprises a square steel pipe-1, CFRP circular pipes-2, an upper outer ring plate-3, a lower outer ring plate-4, a shear web-5, bolts-6, bolt holes-7, a connecting plate-8, a steel beam-9, an upper flange-10, a lower flange-11, a steel beam web-12, an upper positioning hole-13 and a lower positioning hole-14.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1 to 8, in the first embodiment, a node for bolting outer ring plates of a square steel tube concrete column and a steel beam comprises
The CFRP circular tube 2 is arranged in the square steel tube 1;
an upper outer ring plate 3 having an upper positioning hole 13;
a lower outer ring plate 4 parallel to the upper outer ring plate 3, the lower outer ring plate 4 having a lower positioning hole 14 at a position corresponding to the upper positioning hole 13, the square steel pipe 1 penetrating and connecting the upper positioning hole 13 and the lower positioning hole 14;
the two shear webs 5 are connected with the upper outer ring plate 3 and the lower outer ring plate 4 and are respectively positioned on two opposite sides of the square steel pipe 1;
the two steel beams 9 are made of H steel and are respectively arranged on two opposite sides of the square steel tube 1;
wherein, the two sides of the upper outer ring plate 3 and the two sides of the lower outer ring plate 4 are respectively detachably connected with the two steel beams 9 through connecting plates 8.
The present embodiment is implemented as follows:
when the connector is used, the connector 8 after replacement is enabled to be quickly repaired after the contact is vibrated through the detachable connector 8; in the application, the upper and lower outer ring plates, the shear web plates 5, the bolt holes 7 of the upper and lower outer ring plates and the bolt holes 7 of the steel beams 9 are finished in a factory, after the upper and lower outer ring plates and the shear web plates 5 are welded at corresponding positions of the square steel pipes 1 in a construction site, the steel beams 9 are hoisted and connected through the connecting plates 8, namely the connection between the steel beams 9 and the square steel pipes 1 is finished, the field operation amount is small, and the construction efficiency of the steel structure is improved; the upper outer ring plate and the lower outer ring plate can increase the overall rigidity of the node and improve the stability of the node; through set up CFRP pipe 2 in square steel pipe 1 for the hysteresis curve of node is plump relatively, the ductility improves, and consequently the power consumption ability of structure obtains effectively promoting.
As a further optimization scheme of the present embodiment: a concrete column is arranged between the inner wall of the square steel tube 1 and the outer wall of the CFRP circular tube 2.
This optimization scheme, through setting up the concrete increase intensity between square steel pipe 1 and CFRP pipe 2.
Example two
As an optimization scheme of the first embodiment, the CFRP circular pipe 2 is a double-layer pipe, the thickness of each layer is 0.167mm, the inner diameter of the CFRP circular pipe 2 is 0.5-0.7 times of the section of the square steel pipe 1, and the height of the CFRP circular pipe 2 is the same as that of the square steel pipe 1.
The embodiment is implemented like this, through set up CFRP pipe 2 in square steel pipe 1 for the hysteresis curve of node is relatively plump, the ductility improves, and therefore the power consumption ability of structure obtains effectively promoting.
EXAMPLE III
As an optimization scheme of the second embodiment, the section length of the upper outer ring plate 3 and the lower outer ring plate 4 is 1-1.2 times of the length of the steel beam 9, the width of the upper outer ring plate is 1.4-1.5 times of the section width of the square steel pipe, and the thickness of the upper outer ring plate is the same as the thickness of the upper flange 10 of the steel beam 9.
In this embodiment, the strength and stability of the node can be improved by setting the dimensions of the upper outer ring plate 3, the lower outer ring plate 4, the steel beams 9, and the square steel pipes.
As a further optimization scheme of the present embodiment: the effective cross-sectional width of the upper outer ring plate 3 and the lower outer ring plate 4 is greater than 0.5 times the width of the square steel pipe 1.
The optimization scheme is as follows: through the reasonable setting to the size, can increase the intensity of node, improve stability.
Example four
As an optimization scheme of the third embodiment, a plurality of bolt holes 7 are respectively formed in the connecting plate 8 and the upper flange 10 or the lower flange 11, the upper outer ring plate 3 or the lower outer ring plate 4 corresponding to the connecting plate 8, the connecting plate 8 is connected with the upper flange 10, the lower flange 11, the upper outer ring plate 3 and the lower outer ring plate 4 through bolts penetrating through the bolt holes 7, and the distance between the adjacent bolt holes 7 is 60mm-80 mm.
This embodiment is implemented like this, can realize dismantling, changing connecting plate 8 through the cooperation of bolt and screw hole 7, can realize that the node shakes the back and repairs fast.
As a further optimization scheme of the present embodiment: the length of the section of the connecting plate 8 is five times of the interval of the bolt holes 7, the width of the connecting plate is the same as that of the upper flange 10 or the lower flange 11, and the thickness of the connecting plate is the same as that of the upper flange 10 or the lower flange 11.
The optimization scheme is as follows: by setting the size of the connecting plate 8, the stability and strength of the node can be increased.
EXAMPLE five
As an optimization of the fourth embodiment, the shear web 5 and the upper outer ring plate 3, the lower outer ring plate 4, and the square steel pipe 1 and the upper outer ring plate 3, the lower outer ring plate 4 are all connected by welding.
The embodiment is implemented in such a way that the initial rigidity and ductility of the upper and lower outer ring plates in a welding mode are good, the node has good rotation capacity and ductility, and the seismic performance of the node can be improved by increasing the thickness and length of the outer ring plate.
As a further optimization scheme of the present embodiment: the welding seam of the welding mode is a double-sided fillet welding seam or a full penetration welding seam.
According to the optimized scheme, the welding stability can be improved through the welding mode of the double-sided fillet weld or the full penetration weld.
As a further optimization scheme of the present embodiment: the thickness of the beam web 12 of the steel beam 9 is the same as the thickness of the shear web 5.
This optimization scheme through the setting to the thickness of girder steel kickboard and shear web, can increase the intensity and the stability of node.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Taking a square steel tube concrete column-steel beam outer ring plate node provided with a CFRP circular tube as a model description, analyzing the node by using finite element analysis software ABAQUS; the node column has a square section of 245mm multiplied by 245mm, the wall thickness is 8mm, and the height is 2500 mm; the steel beam is H-shaped steel with the section size of 400mm multiplied by 200mm multiplied by 8mm multiplied by 13mm, and the beam length is 1000 mm; the inner diameter of the CFRP circular tube is 150mm, the CFRP is composed of two layers, and the thickness of each layer is 0.167 mm; the length of the outer ring plate is 1045mm, the width of the outer ring plate is 345mm, and the thickness of the outer ring plate is the same as that of the flange of the beam; determining the number of beam flange bolt holes and the bolt hole spacing according to the section bending strength of the steel beam, wherein the beam flange bolt holes and the bolt hole spacing are required to meet relevant requirements in the design Specification of a steel structure (GB 50017-2017); the bolts are 10.9 grade M20 friction type high-strength bolts; at the initial loading stage, the concrete, the steel pipe and the CFRP work cooperatively, and the stress is gradually expanded; then, the concrete is gradually crushed from the center to the outside, and the connecting plates and the welding seams begin to yield; in the strengthening stage, the bending deformation of the steel beam web and the shear web is gradually increased, the damage to the connecting plate and the concrete is increased, but the bearing capacity is stably increased due to the protection effect of the CFRP; then, the welding seam between the steel beam web plate and the shear web plate is damaged, and the bending deformation of the connecting plate is large; the load displacement curve of the node in the cyclic reciprocating loading mode is shown in fig. 9; the capability of the structure to absorb and consume energy under the action of reciprocating load is an important index for expressing the anti-seismic performance of the structure, and the stronger the energy consumption capability is, the better the anti-seismic performance is; as can be seen from fig. 10, the total energy dissipation coefficient at each load level tends to increase; at the initial loading stage, the curve increase slope is smaller, and the whole node is in an elastic state; along with the gradual increase of displacement, the connecting plate and the concrete gradually participate in energy consumption, and the slope of the curve is increased, which shows that the energy consumption capability of the node under the reciprocating load is good.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the inventive concept of the present invention, which falls into the protection scope of the present invention.
Claims (10)
1. The utility model provides a square steel core concrete column-outer ring plate bolted connection node of girder steel which characterized in that: comprises that
The CFRP circular tube is arranged in the square steel tube;
the upper outer ring plate is provided with an upper positioning hole;
the lower outer ring plate is parallel to the upper outer ring plate, a lower positioning hole is formed in the position, corresponding to the upper positioning hole, of the lower outer ring plate, and the square steel pipe penetrates through and is connected with the upper positioning hole and the lower positioning hole;
the two shear webs are connected with the upper outer ring plate and the lower outer ring plate and are respectively positioned on two opposite sides of the square steel pipe;
the two steel beams are H steel and are respectively arranged on two opposite sides of the square steel tube;
wherein, the both sides of this upper portion outer ring plate, the both sides of lower part outer ring plate are connected with two girder steels can be dismantled through connecting plate respectively.
2. The concrete-filled square steel tubular column-steel beam outer ring plate bolt connection node according to claim 1, wherein a concrete column is provided between the inner wall of the square steel tubular and the outer wall of the CFRP circular tube.
3. The square steel tube concrete column-steel beam outer ring plate bolt connection node according to claim 2, wherein the CFRP round tube is a double-layer tube having a thickness of 0.167mm per layer, the CFRP round tube has an inner diameter of 0.5 to 0.7 times the cross-section of the square steel tube, and the CFRP round tube has the same height as the square steel tube.
4. The square steel tube concrete column-steel beam outer ring plate bolt-connection node according to claim 3, wherein the upper and lower outer ring plates have a sectional length 1-1.2 times the length of the steel beam, a width 1.4-1.5 times the sectional width of the square steel tube, and a thickness equal to the thickness of the upper flange of the steel beam.
5. The square steel tubular column-steel beam outer ring plate bolt-connection node according to claim 4, wherein the upper outer ring plate and the lower outer ring plate have a cross-sectional effective width greater than 0.5 times the width of the square steel tube.
6. The square steel tubular column-steel beam outer ring plate bolt connection node according to claim 5, wherein the connection plate and the upper flange or the lower flange, the upper outer ring plate or the lower outer ring plate corresponding to the connection plate are respectively provided with a plurality of bolt holes, the connection plate is connected with the upper flange, the lower flange, the upper outer ring plate and the lower outer ring plate through bolts penetrating through the bolt holes, and the distance between adjacent bolt holes is 60mm to 80 mm.
7. The column-beam outer ring plate bolting node of concrete filled square steel tube according to claim 6, wherein the cross-sectional length of the connecting plate is five times the bolt hole pitch, the width is the same as the width of the upper flange or the lower flange, and the thickness is the same as the thickness of the upper flange or the lower flange.
8. The square steel tube concrete column-steel beam outer ring plate bolting node according to claim 7, wherein said shear web and said upper outer ring plate, said lower outer ring plate, and said square steel tube and said upper outer ring plate, said lower outer ring plate are connected by welding.
9. The concrete filled square tubular column-steel beam outer ring plate bolted joint according to claim 8, wherein the welding mode is a double fillet weld or a full penetration weld.
10. The square steel tubular column-steel beam outer ring plate bolt connection node according to claim 9, wherein the steel beam web plate of the steel beam has the same thickness as the shear web plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110968836.0A CN113638497A (en) | 2021-08-23 | 2021-08-23 | Bolt connection node of outer ring plate of square steel tube concrete column-steel beam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110968836.0A CN113638497A (en) | 2021-08-23 | 2021-08-23 | Bolt connection node of outer ring plate of square steel tube concrete column-steel beam |
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Application publication date: 20211112 |