CN111576644A - Hybrid frame structure system of rigid connection node - Google Patents

Hybrid frame structure system of rigid connection node Download PDF

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Publication number
CN111576644A
CN111576644A CN202010571845.1A CN202010571845A CN111576644A CN 111576644 A CN111576644 A CN 111576644A CN 202010571845 A CN202010571845 A CN 202010571845A CN 111576644 A CN111576644 A CN 111576644A
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CN
China
Prior art keywords
steel
thin
concrete
node
precast
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010571845.1A
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Chinese (zh)
Inventor
杨峰
俞锋波
劳红锋
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Ningbo Excellent Building Technology Co ltd
Original Assignee
Ningbo Excellent Building Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Excellent Building Technology Co ltd filed Critical Ningbo Excellent Building Technology Co ltd
Priority to CN202010571845.1A priority Critical patent/CN111576644A/en
Publication of CN111576644A publication Critical patent/CN111576644A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • E04B1/58Connections for building structures in general of bar-shaped building elements
    • E04B1/5825Connections for building structures in general of bar-shaped building elements with a closed cross-section
    • E04B1/5831Connections for building structures in general of bar-shaped building elements with a closed cross-section of substantially rectangular form
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/30Structures 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
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/32Floor structures wholly cast in situ with or without form units or reinforcements
    • E04B5/36Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
    • E04B5/38Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
    • E04B5/40Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element with metal form-slabs

Abstract

A hybrid frame structure system of a rigid joint comprises a precast concrete superposed beam, a steel bearing plate composite floor and a thin-wall steel tube concrete composite column, wherein the precast concrete superposed beam comprises a precast beam and a cast-in-place part, beam negative bending moment steel bars are arranged in the cast-in-place part, the precast beam comprises main ribs and beam end bottom steel plates, the steel bearing plate composite floor comprises a steel bearing plate and reinforced concrete poured on the steel bearing plate, the thin-wall steel tube concrete composite column comprises thin-wall steel tubes, steel tube inner concrete and a joint U-shaped steel bracket, the thin-wall steel tubes are provided with reinforcing steel plates and through holes penetrating the negative bending moment steel bars at joints, and the bottoms of the joint U-shaped steel brackets are provided with groove-shaped through holes. The combined column has large bearing capacity, the precast beams can be hoisted simultaneously in multiple layers, the hogging moment steel bars of the beams in the node area directly penetrate through the nodes, and the lower beam end steel plates are connected in a back-up welding mode after floor construction is completed.

Description

Hybrid frame structure system of rigid connection node
Technical Field
The invention relates to a structural system of a building, in particular to a hybrid frame structural system of a rigid connection node.
Background
The traditional multilayer steel frame structure system usually uses steel columns and steel beams as vertical and horizontal stress members, has the problems of high manufacturing cost, poor fire resistance and corrosion resistance, high later maintenance cost and the like, has high requirement on joint connection precision and slow hoisting speed, and has large steel pipe wall thickness and large steel consumption if the vertical members adopt steel pipe concrete combined columns. To the project that the layer height is little, the span is little and the load is little, generally adopt assembled reinforced concrete frame structure system, when post and floor adopted different reference numerals, construction process was complicated and difficult, and consequently the post cross-section is big, and the roof beam can only hoist and mount the construction layer by layer, and the progress is slow, and the cost is higher, and the easy collision of beam column node reinforcing bar simultaneously is under construction inconveniently. A rigid-connection combined frame structure system which has large bearing capacity of a combined column, can hoist a plurality of layers of precast beams simultaneously, has a node area beam hogging moment reinforcing steel bar directly penetrating through a node and has convenient lower part welding is not reported.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a rigid-connection hybrid frame structure system which has large bearing capacity of a combined column, can simultaneously hoist a plurality of layers of precast beams, directly penetrates through a node by a beam hogging moment reinforcing steel bar in a node area and is convenient to weld at the lower part.
The invention provides a hybrid frame structure system of rigid-joint nodes, which comprises a precast concrete superposed beam, a steel bearing plate composite floor and a thin-wall steel tube concrete composite column, wherein the precast concrete superposed beam comprises a precast beam and a cast-in-situ part, beam negative bending moment steel bars are arranged in the cast-in-situ part, the precast beam is a prestressed precast beam or a non-prestressed precast beam, the precast beam comprises main ribs and beam end bottom steel plates, the beam end bottom steel plates are welded and connected with the end parts of the main ribs, the steel bearing plate composite floor comprises steel bearing plates and reinforced concrete poured on the steel bearing plates, the steel bearing plates are steel bar truss floor bearing plates or closed floor bearing plates, the steel bearing plates are placed on two sides of the upper part of the precast beam, the thin-wall steel tube concrete composite column comprises thin-wall steel tubes, steel tube inner concrete and node U-shaped steel corbels, the thin-wall steel tubes are provided with reinforcing steel plates and through holes for penetrating the negative bending moment, the negative bending moment steel bar penetrates through the through hole and extends into the precast concrete superposed beam for a certain length, the reinforcing steel plate is welded on the periphery of the through hole, a groove-shaped through hole is formed in the bottom of the node U-shaped steel bracket, the node U-shaped steel bracket is welded on the outer wall of the thin-wall steel pipe, the precast beam is placed on the node U-shaped steel bracket, and the node U-shaped steel bracket is welded and connected with the beam end bottom steel plate through the groove-shaped through hole.
The hybrid frame structure system of the rigid connection node provided by the invention also has the following attached technical characteristics:
the thin-wall steel pipe is formed by welding and combining a plurality of high-strength thin steel plates after cold roll forming, the strength of the thin-wall steel pipe is more than Q345, and the strength of concrete in the steel pipe is more than C50.
The node U-shaped steel bracket comprises a bottom plate, a web plate and an upper flange plate.
The lower side of the end part of the precast beam is in a slope shape, and the bottom of the end part of the precast beam is provided with a notch.
The thin-wall steel pipe is provided with an inner transverse partition plate and an outer transverse partition plate at a node, the inner transverse partition plate is provided with a concrete vent hole, and the bottoms of the adjacent node U-shaped steel corbels are connected through the outer transverse partition plate in a welding mode.
The web plate of the node U-shaped steel bracket is in a right-angle ladder shape with a large lower part and a small upper part.
The thin-walled steel pipe is welded with a certain number of shear nails within the U-shaped steel bracket wrapping range, and the shear nails extend out of the inner side and the outer side of the wall of the thin-walled steel pipe by a certain length.
The inner wall of the thin-wall steel pipe is welded with a tie nail or a wavy steel bar.
The thin-wall steel pipe is internally provided with braces, the braces are steel bars or angle bars and are arranged at certain intervals along the longitudinal direction of the thin-wall steel pipe.
The thin-wall steel pipe concrete combined column is formed by welding and combining a plurality of sections of thin-wall steel pipes, vertical ribs are welded in the thin-wall steel pipes, reinforcing steel bars are arranged at column joints of the vertical ribs, one ends of the reinforcing steel bars are welded to the vertical ribs, and the other ends of the reinforcing steel bars extend out of the ends of the vertical ribs by a certain length.
Compared with the prior art, the hybrid frame structure system of the rigid connection node provided by the invention has the following advantages:
1. realize multilayer precast beam hoist simultaneously, the construction progress is fast.
2. The combination column and the joint adopt high-strength concrete, so that the bearing capacity of the column is improved, and the section size of the column is reduced.
3. The beam column connection node has simple structure, convenient construction and reliable force transmission.
4. The thin-wall steel pipe concrete column uses less steel, saves the cost of various construction measures and reduces the manufacturing cost.
Drawings
FIG. 1 is an effect diagram of the rigid-connection hybrid frame structure system of the present invention.
FIG. 2 is a schematic view of a beam-column joint of the present invention.
Fig. 3 is a cross-sectional view of a beam-column joint of the present invention.
FIG. 4 is a top view of a beam-column joint of the present invention.
FIG. 5 is a schematic view of the thin-walled steel tube assembled column of the present invention.
Fig. 6 is a schematic view of an end of a precast beam according to the present invention.
FIG. 7 is a schematic view of the joint of the multi-section thin-walled steel pipe of the present invention.
Fig. 8 is a schematic view of a steel bar truss floor deck according to the present invention.
Fig. 9 is a schematic view of a closed floor deck of the present invention.
FIG. 10 is a first cross-sectional view of the thin-walled steel tube-concrete composite column of the present invention.
FIG. 11 is a schematic sectional view of a thin-walled steel tube-concrete composite column according to the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1 to 11, in an embodiment of a hybrid frame structure system of a rigid-link joint provided by the present invention, the hybrid frame structure system includes a precast concrete composite beam 1, a steel deck composite floor slab 2 and a thin-walled steel tube concrete composite column 3, where the precast concrete composite beam 1 includes a precast beam 11 and a cast-in-place portion 12, a beam negative moment steel bar 4 is disposed in the cast-in-place portion 12, the precast beam 11 is a prestressed precast beam or a non-prestressed precast beam, the precast beam 11 includes a main bar 111 and a beam end bottom steel plate 112, the beam end bottom steel plate 112 is welded to an end of the main bar 111, the steel deck composite floor slab 2 includes a steel deck 21 and a reinforced concrete 22 poured on the steel deck, the steel deck 21 is a steel bar truss floor deck 211 or a closed floor deck 212, the steel deck 21 is laid on the precast beam 11, and the thin-walled steel tube concrete composite column 3 includes a thin-walled steel tube 31, The steel tube inner concrete 32 and the node U-shaped steel bracket 33, the thin-walled steel tube 31 is provided with a reinforcing steel plate 311 and a through hole 312 for penetrating a negative bending moment steel bar at the node, the negative bending moment steel bar 4 penetrates the through hole 312 and extends into the precast concrete composite beam 1 for a certain length, the reinforcing steel plate 311 is welded on the periphery of the through hole 312, the bottom of the node U-shaped steel bracket 33 is provided with a groove-shaped through hole 331, the node U-shaped steel bracket 33 is welded on the outer wall of the thin-walled steel tube 31, the precast beam 11 is placed on the node U-shaped steel bracket 33, and the node U-shaped steel bracket 33 is welded and connected with the beam end bottom steel plate 112 through the groove-shaped through hole 331. The combined column has large bearing capacity, the precast beams can be hoisted simultaneously in multiple layers, the hogging moment steel bars of the beams in the node area directly penetrate through the nodes, and the lower beam end steel plates are connected in a back-up welding mode after floor construction is completed.
Referring to fig. 10 and 11, in the embodiment of the hybrid frame structure system of the rigid-link joint provided by the present invention, the thin-walled steel tube 31 is formed by welding and combining a plurality of high-strength thin steel plates after being formed by cold bending, the strength of the thin-walled steel tube 31 is above Q345, and the strength of the concrete 32 in the steel tube is above C50. The thin-wall steel pipe formed by cold roll forming is convenient to process, automatic welding can be realized, and the cost performance of the material is greatly improved by the high-strength steel pipe and the high-strength concrete.
Referring to fig. 2 to 6, in an embodiment of a hybrid frame structure system of a rigid-joint according to the present invention, the U-shaped steel corbel 33 of the joint includes a bottom plate 331, a web 332 and an upper flange plate 333, the lower side of the end of the precast beam 11 is in a slope shape 113, the bottom of the end of the precast beam 11 is provided with a notch 114, the thin-walled steel tube 31 is provided with an inner transverse partition 313 and an outer transverse partition 314 at the joint, the inner transverse partition 313 is provided with concrete vents, the bottoms of the adjacent U-shaped steel corbels 33 are connected by welding through the outer transverse partition 314, and the web 332 of the U-shaped steel corbel 33 of the joint is in a right-angled ladder shape with a large bottom and a small top. The lower side of the precast beam 11 is provided with a notch 113, so that the precast beam 11 is kept in the same plane with the U-shaped steel bracket 33 after placement, the precast beam 11 is in a slope shape, the distance of concrete pouring is reserved for the precast beam 11, the compactness and integrity of the concrete are improved, meanwhile, the post-poured concrete is poured and forms a concrete bracket with the shear nails 6, the node shear strength is further ensured, the U-shaped steel bracket 2 in a right-angle trapezoidal shape saves the steel consumption under the same load, the upper wing edge plate and the transverse partition plate which are mutually connected are beneficial to improving the shear strength, the transverse partition plate is beneficial to node load transmission, and the stress is simple and clear.
Referring to fig. 10 and 11, in an embodiment of a hybrid frame structure system of rigid-link joints according to the present invention, tie nails 316 or corrugated steel bars 317 are welded to an inner wall of the thin-walled steel tube 31, shear nails 5 are welded to a region where the thin-walled steel tube 31 and the U-shaped steel bracket 33 are wrapped, the shear nails 5 extend a certain length outside and inside the wall of the thin-walled steel tube 31, braces 318 are provided in the thin-walled steel tube 31, and the braces 318 are steel bars or angle bars and are uniformly arranged at a certain distance along the longitudinal direction of the thin-walled steel tube. The wavy reinforcing steel bars 317 are reinforcing steel bars formed by bending common reinforcing steel bars into wavy reinforcing steel bars, the drawknot nails 316 or the wavy reinforcing steel bars 317 and the brace 318 are arranged in the thin-wall steel pipe 31, the concrete constraint performance is good, formwork support and split bolt fixation can be avoided when concrete is poured, and the construction efficiency is greatly improved.
Referring to fig. 7, in an embodiment of the hybrid frame structure system of the rigid-connection node according to the present invention, the thin-walled steel tube-concrete composite column 3 is formed by welding and combining a plurality of sections of thin-walled steel tubes 31, vertical ribs 315 are welded in the thin-walled steel tubes 31, the vertical ribs 315 are provided with connecting reinforcing bars 319 at column joints, one end of each connecting reinforcing bar 319 is welded to each vertical rib, and the other end of each connecting reinforcing bar 319 extends out of the end of each vertical rib by a certain length. The internal connecting reinforcing steel bars 319 and the external connecting reinforcing steel bars are welded along the butt joint of the thin-wall steel pipe 31, so that the integrity of the concrete is improved after the concrete is poured, and the mechanical property is good.
In the present invention, all the "a certain number, a certain length, a certain distance" means a length necessary to satisfy design requirements, that is, a length necessary to meet connection and strength requirements, which is clear to those skilled in the art and may be set as needed.

Claims (10)

1. A mixed frame structure system of rigid connection nodes comprises a prefabricated concrete superposed beam, a steel bearing plate composite floor slab and a thin-wall steel pipe concrete composite column, and is characterized in that: the precast concrete superposed beam comprises a precast beam and a cast-in-place part, beam negative moment steel bars are arranged in the cast-in-place part, the precast beam is a prestressed precast beam or a non-prestressed precast beam, the precast beam comprises main bars and beam end bottom steel plates, the beam end bottom steel plates are welded and connected with the end parts of the main bars, the steel bearing plate composite floor slab comprises a steel bearing plate and reinforced concrete poured on the steel bearing plate, the steel bearing plate is a steel bar truss floor bearing plate or a closed floor bearing plate, the steel bearing plates are placed on two sides of the upper part of the precast beam, the thin-walled steel tube concrete composite column comprises a thin-walled steel tube, steel tube inner concrete and a node U-shaped steel bracket, the thin-walled steel tube is provided with a reinforcing steel plate and a through hole penetrating the negative moment steel bars at a node, the negative moment steel bars penetrate through the through hole and extend into the precast concrete superposed beam for a certain length, and the, the bottom of the node U-shaped steel bracket is provided with a groove-shaped through hole, the node U-shaped steel bracket is welded on the outer wall of the thin-wall steel pipe, the precast beam is placed on the node U-shaped steel bracket, and the node U-shaped steel bracket is welded and connected with the beam end bottom steel plate through the groove-shaped through hole.
2. A hybrid frame structure system with rigid joints as in claim 1, wherein the thin-walled steel tubes are formed by welding and assembling a plurality of high-strength thin steel plates after cold-bending forming, the strength of the thin-walled steel tubes is above Q345, and the strength of the concrete in the steel tubes is above C50.
3. A rigid node hybrid frame structural system according to claim 1, wherein said node U-beam corbel comprises a bottom plate, a web plate and an upper flange plate.
4. A rigid-joint hybrid frame construction system according to claim 1, wherein the lower portion of the precast beam ends is sloped and the bottom of the precast beam ends are notched.
5. A hybrid frame structure system with rigid joints according to claim 1, wherein the thin-walled steel pipes are provided with inner diaphragm plates and outer diaphragm plates at the joints, the inner diaphragm plates are provided with concrete vent holes, and the bottoms of the U-shaped steel corbels adjacent to the joints are connected by welding through the outer diaphragm plates.
6. A hybrid frame construction system of rigid joints according to claim 1, wherein the webs of the U-section corbels of the joints are in the shape of right-angled ladders with a large lower part and a small upper part.
7. The hybrid frame structure system of a rigid-link joint according to claim 1, wherein a certain number of shear nails are welded to the thin-walled steel tube within the wrapping range of the U-shaped steel corbel, and the shear nails extend out of the inner side and the outer side of the wall of the thin-walled steel tube by a certain length.
8. A rigid node hybrid frame structure system as in claim 1, wherein said thin walled steel tube has tie nails or corrugated steel welded to its inner wall.
9. A rigid-joint hybrid frame structure system as recited in claim 1, wherein said thin walled steel tubes are provided with braces, said braces being steel bars or angle bars longitudinally spaced apart from said thin walled steel tubes.
10. A rigid hinged joint hybrid frame structure system as recited in claim 1, wherein said thin wall steel tube concrete composite column is assembled by welding a plurality of sections of said thin wall steel tubes, said thin wall steel tubes are welded with vertical ribs, said vertical ribs are provided with connecting bars at the column joints, one end of said connecting bars is welded to said vertical ribs, and the other end of said connecting bars extends out of the end of said vertical ribs by a certain length.
CN202010571845.1A 2020-06-22 2020-06-22 Hybrid frame structure system of rigid connection node Pending CN111576644A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010571845.1A CN111576644A (en) 2020-06-22 2020-06-22 Hybrid frame structure system of rigid connection node

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010571845.1A CN111576644A (en) 2020-06-22 2020-06-22 Hybrid frame structure system of rigid connection node

Publications (1)

Publication Number Publication Date
CN111576644A true CN111576644A (en) 2020-08-25

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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112431305A (en) * 2020-10-30 2021-03-02 中民筑友房屋科技(石首)有限公司 Assembly type building frame and quick connection method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112431305A (en) * 2020-10-30 2021-03-02 中民筑友房屋科技(石首)有限公司 Assembly type building frame and quick connection method thereof

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