CN108824484B - Vehicle section covered steel frame and covered reinforced concrete frame mixed structure - Google Patents

Vehicle section covered steel frame and covered reinforced concrete frame mixed structure Download PDF

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Publication number
CN108824484B
CN108824484B CN201810896092.4A CN201810896092A CN108824484B CN 108824484 B CN108824484 B CN 108824484B CN 201810896092 A CN201810896092 A CN 201810896092A CN 108824484 B CN108824484 B CN 108824484B
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reinforced concrete
steel
frame
covered
conversion
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CN108824484A (en
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刘金栓
周牧
张伯英
李宗凯
巩同川
田磊
温雅歌
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Beijing General Municipal Engineering Design and Research Institute Co Ltd
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Beijing General Municipal Engineering Design and Research Institute Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/045Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
    • 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
    • E04B1/185Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Electromagnetism (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

The vehicle section is covered with a steel frame and is covered with a reinforced concrete frame mixed structure, the vehicle section comprises an upper steel frame and a lower reinforced concrete frame, the upper steel frame comprises a plurality of steel pipe columns which are vertically arranged in parallel, and the steel pipe columns are connected into an integral frame structure through horizontal steel beams; the under-cover reinforced concrete frame comprises a plurality of reinforced concrete columns which are uniformly distributed according to a checkerboard and are vertically arranged in parallel, and a frame structure formed by connecting a transverse conversion beam and a longitudinal reinforced concrete beam into a whole; a transverse conversion beam is further arranged between the conversion beams and connected with the longitudinal reinforced concrete beams to form a first node, and a longitudinal support column tie beam is arranged between the longitudinal reinforced concrete beams and connected with the conversion beams to form a second node; the steel frame is covered on the reinforced concrete frame below the steel frame; the bottom of the steel pipe column is inserted into a reinforced concrete column at the corresponding position below or is sealed in a conversion beam I or a conversion beam at the corresponding node I or node II below. The invention can solve the problems of more consumable materials, heavy self weight, high layer height and large span in the prior art.

Description

Vehicle section covered steel frame and covered reinforced concrete frame mixed structure
Technical Field
The invention relates to the field of building structure design, in particular to a vehicle section covered steel frame and covered reinforced concrete frame mixed structure.
Background
The development status of the upper cover of the existing vehicle section is mainly that of houses and offices, and the structural form is a reinforced concrete structure; a shock insulation conversion layer is generally arranged between a bottom subway garage layer and an upper tower type residential layer, and particularly, fig. 1 and 2 in the drawings are shown.
The existing vehicle section upper cover development structural form is usually a reinforced concrete structure or a section steel concrete structure, the dead weight and the lateral rigidity of the upper cover development structure are large, the earthquake resistance performance design of the lower two-layer structure is unfavorable, and the cost is increased after the performance design is carried out.
The patent application with the application publication number of CN105926675A discloses a mixed structure for the upper cover and the lower cover of a metro vehicle section cover, wherein a frame shear wall structure is adopted at the lower part, section steel is added at the short column position of the shear wall, and besides, a column span is also provided with the shear wall structure, so that the defects of the structure are that the self weight is large, the consumable amount of the structure is more, and the cost is high; in addition, the steel shear wall arranged between the column spans can form space obstruction, so that the inner space of the structure under the cover is not open enough, and the process layout and the use requirements can be limited; the sizes of the components connected with the lower short column and the frame column of the structure cover structure system are unchanged, and the original sizes are maintained, so that the problems that the consumable amount is large, the difference of the vertical anti-side rigidity ratios of the structure cover structure and the structure cover structure is large and the like cannot be solved; the vertical components of the upper cover and the lower cover are connected through, no underpinning exists, the defect is that the shaft net of the upper cover and the lower cover are required to be aligned, the size and the space layout of the shaft net of the upper cover development structure are limited, and the upper cover development structure cannot be flexibly arranged.
Disclosure of Invention
In order to overcome the defects and shortcomings of the technology, the invention provides a hybrid structure of a steel frame covered on a vehicle section and a reinforced concrete frame under the vehicle section.
The technical scheme of the invention is as follows:
the vehicle section covered steel frame and covered reinforced concrete frame mixed structure comprises a covered steel frame and a covered reinforced concrete frame,
the steel frame comprises a plurality of steel pipe columns which are vertically arranged in parallel, and a frame structure formed by connecting transverse steel beams and longitudinal steel beams into a whole is arranged between the steel pipe columns;
the under-cover reinforced concrete frame comprises a plurality of reinforced concrete columns which are uniformly distributed according to a checkerboard and are vertically arranged in parallel, and a transverse conversion beam and a longitudinal reinforced concrete beam are arranged between the reinforced concrete columns to form an integral frame structure; a transverse conversion beam is further arranged between the conversion beams and connected with the longitudinal reinforced concrete beams to form a first node, and a longitudinal support column tie beam is arranged between the longitudinal reinforced concrete beams and connected with the conversion beams to form a second node;
the steel frame cover is arranged on the reinforced concrete frame below the cover; the bottom of the steel pipe column is inserted into a reinforced concrete column at the corresponding position below or is sealed in a conversion beam I or a conversion beam at the corresponding node I or node II below;
and steel bars and cast concrete are arranged in the reinforced concrete column, the conversion beam, the first conversion beam, the reinforced concrete beam and the support column tie beam.
The connection structure of steel-pipe column bottom and reinforced concrete post is:
the steel bar concrete column framework is provided with a section steel at the center, and the outer wall of the lower section of the steel bar concrete column is provided with a peg which is penetrated up and down and then is downwards inserted between the inner wall of the steel bar concrete column framework and the outer wall of the section steel; the reinforced concrete beam and the conversion beam are internally attached to the outer wall of the steel pipe column, a bracket I is arranged, and one end of the bracket I is in butt joint and is anchored with the I-shaped steel beam I;
the top of a vertical stressed steel bar in the side wall of the reinforced concrete column is fixed on a vertical bar connecting plate which is arranged parallel to the side wall of the reinforced concrete column, and the upper edge of the vertical bar connecting plate is fixed on the bottom surface of the upper flange I of the bracket I; the stressed steel bars on the inner sides of the upper wall and the lower wall of the conversion beam are fixed on the outer wall of the steel pipe column through a lap joint horizontal connecting plate I; waist rib connecting plates parallel to the web plates of the bracket I are symmetrically arranged between the upper flanges I and the lower flanges I on two sides of the bracket I, and waist ribs in the side walls of the reinforced concrete beam and the conversion beam are fixed on the waist rib connecting plates.
The steel pipe column bottom and the conversion beam and the rigid connection structure of the support column tie beam connection node II are as follows:
the bottom of the steel pipe column is inserted into the conversion beam, the support column tie beam is just connected to the upper parts of two sides of the conversion beam, a bracket II fixed outside the side wall of the conversion beam is arranged in the support column tie beam, the cantilever end of the bracket II is anchored with a steel I-beam II, and stress steel bars inside the upper wall and the lower wall of the support column tie beam are fixed on the outer wall of the steel pipe column through a lap joint horizontal connecting plate I;
the bottom of the conversion beam is provided with a plurality of U-shaped stirrups side by side along the inner sides of the side wall and the bottom wall, and the top of each stirrup is fixed on the bottom surface of the upper flange of the bracket II through a lap joint vertical connecting plate II;
a bracket III fixed on the outer wall of the steel pipe column is arranged in the conversion beam, an I-shaped steel beam III is anchored at the end of the bracket III cantilever, a pair of connecting plates III parallel to the side wall of the conversion beam are symmetrically arranged between an upper flange III and a lower flange III on two sides of the bracket III by the side wall of the conversion beam, and the three tail ends of waist ribs in the side wall of the conversion beam are fixed on the connecting plates III;
and the rigid connection structure of the bottom of the steel pipe column and the first conversion beam and the reinforced concrete beam connection node is the same as that of the second node.
The bracket I, the bracket II and the bracket III are I-shaped components arranged in the beam, and the web plates of the brackets are arranged along the vertical direction.
And stiffening ribs are arranged between the stress steel bars on the inner sides of the upper wall and the lower wall in the support column tie beam and the upper flange and the lower flange of the bracket II.
And a plurality of stiffening ribs I are arranged in the steel pipe column at different heights along the radial direction.
And the outer part of the upper flange and the lower flange of the I-shaped steel beam II in the conversion beam is provided with studs.
The first conversion beam and the first support column tie beams are uniformly or alternately distributed.
The invention has the following positive and beneficial effects:
1) The self weight of the structure is lightened, and the lateral rigidity is enhanced: the invention adopts a mixed structure form of combining two layers of reinforced concrete frames at the bottom with an upper steel frame, and the covered development structure adopts a steel frame structure form, so that the self weight of the structure can be well lightened, the lateral rigidity is enhanced, and the two layers of reinforced concrete frames at the bottom still adopt a reinforced concrete frame structure, so that the lateral rigidity of the structure is higher. Therefore, the rigidity ratio of the upper part and the lower part of the structural form provided by the invention can better meet the requirements of the specification on the side rigidity ratio of the upper part and the lower part of the structure, and the engineering cost is saved.
2) And the material consumption is saved: steel structure engineering single square meter material consumption: the invention is 0.13 ton, zhang Guwan vehicle section joint overhaul storage 3 area is 0.35 ton, zhang Guwan vehicle section parking train inspection storage 4 area is 0.23 ton. Through accounting, the invention has the advantage that the overall index cost is saved by about 15 percent compared with similar engineering.
3) Saving layer height and span: the cover structure of the invention has a large number of support column conversion, and a large number of simulation experiment, research and analysis and node design are also carried out for the cover structure, and the support column conversion is provided with the following advantages: firstly, vibration isolation conversion is avoided, a vibration isolation layer is not required to be arranged, the layer height and the building height are saved, the engineering cost is reduced, and the later maintenance cost is saved. Secondly, the post-holding conversion can better adapt to the commercial space layout functional requirements of the superstructure, while the span and beam height can be reduced, thereby reducing the floor height and overall building height of the building.
Drawings
FIG. 1 is a schematic diagram of a prior art vehicle section upper cover development configuration;
FIG. 2 is a node construction diagram of a prior art vehicle section upper cover development structure;
FIG. 3 is a schematic diagram of the structure of the present invention;
FIG. 4 is a schematic distribution diagram of the connection of the steel pipe column on the cover and the structure under the cover of the invention;
FIG. 5 is a schematic diagram of the structure at C of FIG. 3;
FIG. 6 is a large cross-sectional view of the joint between the steel pipe column and the normal concrete column at the node A in FIG. 5;
FIG. 7 is a cross-sectional view of the 1-1 position of FIG. 6;
FIG. 8 is a cross-sectional view of the steel pipe column and transition Liang Jituo column tie beam of the node B of FIG. 5;
FIG. 9 is a cross-sectional view of the 2-2 position of FIG. 8;
fig. 10 is a cross-sectional view of the 3-3 position of fig. 8.
Figure number: 1-covered steel frame, 2-covered lower reinforced concrete frame, 4-steel pipe column, 5-steel beam, 6-reinforced concrete column, 7-bracket tie beam, 8-peg, 9-section steel, 10-bracket one, 101-upper flange one, 102-lower flange one, 103-web one, 11-I-beam one, 12-vertical reinforcement connection plate, 13-horizontal connection plate one, 14-waist reinforcement connection plate, 16-bracket two, 161-upper flange two, 162-lower flange two, 163-web two, 17-I-beam two, 19-connection plate two, 20-bracket three, 201-upper flange three, 202-lower flange three, 21-I-beam three, 22-connection plate three, 23-waist reinforcement three, 24-stiffening rib, 25-stiffening rib two, 27-reinforcing steel bar beam, 28-conversion beam, 281-conversion beam one, 29-covered house wall, 30-vibration isolation support, 31-vibration isolation support pier, 32-covered conversion beam, 33-covered conversion beam, 34-structure conversion layer, 35-stiffening rib one, 37-reinforcing steel bar, 37-concrete tie-bar, and 38-reinforcing steel bar nodes.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings.
The following examples are given for the purpose of illustration only and are not intended to limit the embodiments of the invention. Various other changes and modifications may be made by one of ordinary skill in the art in light of the following description, and such obvious changes and modifications are contemplated as falling within the spirit of the present invention.
Referring to the drawings, the vehicle section is covered with a mixed structure of an upper steel frame and a lower reinforced concrete frame, which comprises an upper steel frame 1 and a lower reinforced concrete frame 2,
referring to fig. 3, 4 and 5, the steel frame 1 comprises a plurality of steel pipe columns 4 arranged vertically in parallel, and a frame structure formed by connecting transverse and longitudinal steel beams 5 is arranged between the steel pipe columns 4;
the under-cover reinforced concrete frame 2 comprises a plurality of reinforced concrete columns 6 which are uniformly distributed according to a checkerboard and are vertically arranged in parallel, a transverse conversion beam 28 and a longitudinal reinforced concrete beam 27 are arranged between the reinforced concrete columns 6 and are connected into an integrated frame structure; a transverse conversion beam I281 is further arranged between the conversion beams 28 and connected with the longitudinal reinforced concrete beams 27 to form a node I39, and a longitudinal support column tie beam 7 is arranged between the longitudinal reinforced concrete beams 27 and connected with the conversion beams 28 to form a node II 40;
the steel frame 1 is covered on the reinforced concrete frame 2; the bottom of the steel pipe column 4 is inserted into the reinforced concrete column 6 at the corresponding position below or is sealed in the conversion beam one 281 or the conversion beam 28 at the corresponding node one or the node two below;
the reinforced concrete column 6, the conversion beam 28, the conversion beam 281, the reinforced concrete beam 27 and the support column tie beam 7 are respectively internally provided with reinforced steel bars and cast concrete.
Referring to fig. 6 and 7, the connection structure between the bottom of the steel pipe column 4 and the reinforced concrete column 6 is as follows:
the steel bar reinforced concrete column 6 is provided with a profile steel 9 at the center, and the outer wall of the lower section of the steel tube column 4 is provided with a peg 8 which is penetrated from top to bottom and then is downwards inserted between the inner wall of the steel bar reinforced concrete column 6 framework and the outer wall of the profile steel 9; the reinforced concrete beam 27 and the conversion beam 28 are internally attached to the outer wall of the steel pipe column 4, a bracket I10 is arranged, and the tail end of the bracket I10 is in butt joint with the I-shaped steel beam I11;
the top of a vertical stress steel bar 37 in the side wall of the reinforced concrete column 6 is fixed on a vertical bar connecting plate 12 arranged parallel to the side wall of the reinforced concrete column 6, and the upper edge of the vertical bar connecting plate 12 is fixed on the bottom surface of a top flange one 101 of a bracket one 10; the stress steel bars 37 on the inner sides of the upper wall and the lower wall of the conversion beam 28 are fixed on the outer wall of the steel pipe column 4 through a lap joint horizontal connecting plate I13; the waist rib connecting plates 14 parallel to the web plates 103 of the bracket I10 are symmetrically arranged between the upper flange I101 and the lower flange I102 on two sides of the bracket I10, and the waist ribs in the side walls of the reinforced concrete beam 27 and the conversion beam 28 are fixed on the waist rib connecting plates 14.
Referring to fig. 8, 9, and 10, the rigid connection structure of the connection node two 40 between the bottom of the steel pipe column 4 and the conversion beam 28 and the bracket beam 7 is:
the bottom of the steel pipe column 4 is inserted into the conversion beam 28, the support column tie beam 7 is just connected to the upper parts of two sides of the conversion beam 28, a bracket II 16 fixed outside the side wall of the conversion beam 28 is arranged in the support column tie beam 7, the cantilever end of the bracket II 16 is anchored with an I-shaped steel beam II 17, and stress steel bars 37 on the inner sides of the upper wall and the lower wall of the support column tie beam 7 are fixed on the outer wall of the steel pipe column 4 through a lap joint horizontal connecting plate I13;
the bottom of the conversion beam 28 is provided with a plurality of U-shaped stirrups 38 side by side along the inner sides of the side wall and the bottom wall, and the top of each stirrup 38 is fixed on the bottom surface of the upper flange 161 of the bracket II 16 through a lap joint vertical connecting plate II 19;
a bracket III 20 fixed on the outer wall of the steel pipe column 4 is arranged in the conversion beam 28, an I-shaped steel beam III 21 is anchored at the cantilever end of the bracket III 20, a pair of connecting plates III 22 parallel to the side wall of the conversion beam 28 are symmetrically arranged between an upper flange III 201 and a lower flange III 202 on two sides of the bracket III 20 by the side wall of the conversion beam 28, and the tail end of a waist rib III 23 in the side wall of the conversion beam 28 is fixed on the connecting plates III 22;
the rigid connection structure of the bottom of the steel pipe column 4 and the first conversion beam 281 and the first connection node 39 of the reinforced concrete beam 27 is the same as the rigid connection structure of the second connection node 40.
The bracket I10, the bracket II 16 and the bracket III 20 are I-shaped components arranged in the beam, and webs of the brackets are arranged along the vertical direction.
Referring to fig. 9, the inner side stress steel bars 37 of the upper and lower walls in the bracket tie beam 7 are connected with the stiffening ribs 24 arranged between the upper and lower flanges of the bracket two 16.
Referring to fig. 6, a plurality of first stiffening ribs 36 are radially disposed at different heights within the steel pipe column 4.
Referring to fig. 10, the studs 8 are disposed outside the upper and lower flanges of the second i-steel beam 17 in the transfer beam 28.
Referring to fig. 4, the transfer beam 281 and the bracket tie beam 7 are uniformly or intermittently distributed.
The invention relies on the engineering upper cover to develop the business and large-scale public building, the structural form innovatively adopts the mixed structure of two layers of reinforced concrete frames at the bottom combined with the steel frame at the upper part; the vibration isolation layer is not required to be arranged between the upper cover and the lower cover, the requirement of standard vibration resistance index can be met by directly converting, and the manufacturing cost and the layer height are saved. See in particular figures 3 and 4 of the drawings.
Fig. 6 to 10 are key node structure diagrams: the reinforced concrete beam is connected with the steel column through the bracket, the stress steel bar in the beam is reliably welded with the bracket, the length of the double-sided welding seam is not less than 5d (d is the diameter of the stress steel bar in the beam), the bracket is welded with the column steel factory, and the bracket flange and the web are connected with the column by adopting full penetration primary welding seams; the stress steel bars in the column are disconnected when the stress steel bars collide with the bracket through the joint core area, and are connected with the bracket flange through the joint connecting plate or the threaded sleeve, so that force transmission is ensured to be continuous and reasonable.
In order to verify the effect of the invention, two types of anti-seismic performance indexes are mainly set for key parts and key components in the structural design process: 1) Small earthquake elasticity, medium earthquake elasticity, bending resistance, non-yielding and large earthquake allowance with a small amount of plasticity; 2) Small earthquake elasticity, medium earthquake shear bending resistance average elasticity and large earthquake allowable small amount of plasticity.
Aiming at the two anti-seismic performance indexes, three kinds of software PMSAP, SAP, ABAQUS are applied to respectively check and calculate a structural design model: 1) The small earthquake CQC analysis and time course analysis mainly verify the stress and deformation condition of the structural model in the small earthquake elasticity stage; 2) The middle earthquake CQC analysis provides performance index requirements of middle earthquake elasticity or middle earthquake unyielding for structural key layers and key components (conversion beams and conversion columns) and carries out accounting design. 3) And analyzing and researching the deformation form of the structure under the action of strong earthquake, the plasticity of the component and the damage condition of the component and the elastoplastic behavior of the whole structure by using the time course of great seismoelasticity and elastoplastic. The structural key parts, the deformation forms and the damage conditions of the key components are analyzed through computer simulation, so that the earthquake resistance of the structure under the action of large earthquake is demonstrated, the safety and the rationality of the structural form adopted by the engineering are verified, and the national overrun examination committee is passed for recording and evaluating.
The invention adopts a pure frame structure, and the frame column is internally provided with a profile steel framework, so that the invention has the advantages of well reducing the self weight of the structure and ensuring the sufficient shear bearing capacity and lateral rigidity of the structure.
A plurality of uniform or spaced transfer beams 281 and bracket tie beams 7 may enhance building stability.
Application examples:
the original structure is a straight-through square column, the column section size is 1800mm multiplied by 2000mm, after the structure is adopted, the first layer of the development structure is covered to be changed into a column, the column section diameter is reduced to 1400mm, the second layer of the development structure is covered to be changed into a round steel column, the column section diameter is reduced to 1200mm, the vertical lateral rigidity change of the system is uniform, the advantages are obvious, and the system is more reasonable.

Claims (8)

1. The vehicle section covered steel frame and covered reinforced concrete frame mixed structure comprises an covered steel frame (1) and a covered reinforced concrete frame (2), and is characterized in that the covered steel frame (1) comprises a plurality of steel pipe columns (4) which are vertically arranged in parallel, and transverse and longitudinal steel beams (5) are arranged between the steel pipe columns (4) to form an integrated frame structure;
the under-cover reinforced concrete frame (2) comprises a plurality of reinforced concrete columns (6) which are uniformly distributed according to a checkerboard and are vertically arranged in parallel, a transverse conversion beam (28) and a longitudinal reinforced concrete beam (27) are arranged between the reinforced concrete columns (6) and are connected into an integrated frame structure; a transverse first conversion beam (281) is further arranged between the conversion beams (28) and connected with the longitudinal reinforced concrete beams (27) to form a first node (39), and a longitudinal support column tie beam (7) is arranged between the longitudinal reinforced concrete beams (27) and connected with the conversion beams (28) to form a second node (40);
the steel frame (1) is covered on the reinforced concrete frame (2); the bottom of the steel pipe column (4) is inserted into a reinforced concrete column (6) at the corresponding position below or is sealed in a conversion beam one (281) or a conversion beam (28) at the corresponding node one or two below;
reinforced concrete columns (6), conversion beams (28), conversion beams I (281), reinforced concrete beams (27) and support column tie beams (7) are respectively internally provided with reinforced bars and cast concrete.
2. The vehicle section steel frame covered and reinforced concrete frame under cover hybrid structure according to claim 1, wherein the connection structure of the steel pipe column (4) bottom and the reinforced concrete column (6) is: the steel bar reinforced concrete column (6) is characterized in that a profile steel (9) is arranged at the center of the framework of the steel bar reinforced concrete column (6), and a bolt (8) is arranged on the outer wall of the lower section of the hollow steel pipe column (4) which is penetrated up and down and then is inserted downwards between the inner wall of the framework of the steel bar reinforced concrete column (6) and the outer wall of the profile steel (9); the reinforced concrete beam (27) and the conversion beam (28) are internally attached to the outer wall of the steel pipe column (4) and provided with a bracket I (10), and the tail end of the bracket I (10) is in butt joint with the anchoring I-shaped steel beam I (11);
the top of a vertical stressed steel bar (37) in the side wall of the reinforced concrete column (6) is fixed on a vertical bar connecting plate (12) which is arranged parallel to the side wall of the reinforced concrete column (6), and the upper edge of the vertical bar connecting plate (12) is fixed on the bottom surface of a top flange I (101) of a bracket I (10); the stress steel bars (37) on the inner sides of the upper wall and the lower wall of the conversion beam (28) are fixed on the outer wall of the steel pipe column (4) through a lap joint horizontal connecting plate I (13); waist rib connecting plates (14) parallel to a web plate one (103) of the bracket one (10) are symmetrically arranged between upper flanges one (101) and lower flanges one (102) on two sides of the bracket one (10), and waist ribs in side walls of the reinforced concrete beam (27) and the conversion beam (28) are fixed on the waist rib connecting plates (14).
3. The vehicle section steel frame covered and reinforced concrete frame covered hybrid structure according to claim 2, wherein the rigid connection structure of the connection node two (40) of the bottom of the steel pipe column (4) and the conversion beam (28) and the support column tie beam (7) is as follows: the bottom of the steel pipe column (4) is inserted into a conversion beam (28), the support column tie beam (7) is just connected to the upper parts of two sides of the conversion beam (28), a bracket II (16) fixed outside the side wall of the conversion beam (28) is arranged in the support column tie beam (7), an I-shaped steel beam II (17) is anchored at the cantilever end of the bracket II (16), and stress steel bars (37) on the inner sides of the upper wall and the lower wall of the support column tie beam (7) are fixed on the outer wall of the steel pipe column (4) through a lap joint horizontal connecting plate I (13);
a plurality of U-shaped stirrups (38) are arranged at the bottom of the conversion beam (28) side by side along the inner sides of the side wall and the bottom wall, and the tops of the stirrups (38) are fixed on the bottom surface of an upper flange (161) of the bracket II (16) through a lap joint vertical connecting plate II (19);
a bracket III (20) fixed on the outer wall of the steel pipe column (4) is arranged in the conversion beam (28), an I-shaped steel beam III (21) is anchored at the cantilever end of the bracket III (20), a pair of connecting plates III (22) parallel to the side wall of the conversion beam (28) are symmetrically arranged between an upper flange III (201) and a lower flange III (202) on two sides of the bracket III (20) by the side wall of the conversion beam (28), and the tail ends of waist ribs III (23) in the side wall of the conversion beam (28) are fixed on the connecting plates III (22);
the rigid connection structure of the bottom of the steel pipe column (4) and the first conversion beam (281) and the reinforced concrete beam (27) for connecting the first node (39) is the same as that of the second node (40).
4. A vehicle section steel frame covered and reinforced concrete frame covered hybrid structure according to claim 3, wherein the bracket one (10), bracket two (16) and bracket three (20) are i-shaped members arranged in the beam, and the web of each bracket is arranged along the vertical direction.
5. A vehicle section steel frame covered and reinforced concrete frame covered mixed structure as claimed in claim 2 or 3, wherein stiffening ribs (24) are arranged between the upper and lower flanges of the bracket II (16) and the inner side stress steel bars (37) of the upper and lower walls in the support column tie beam (7).
6. The vehicle section steel frame-covered and reinforced concrete frame-covered hybrid structure according to claim 1, wherein a plurality of stiffening ribs one (36) are radially arranged at different heights in the steel pipe column (4).
7. The composite structure of the steel frame covered on the vehicle section and the reinforced concrete frame covered under the vehicle section according to claim 1, wherein the studs (8) are arranged outside the upper flange and the lower flange of the I-shaped steel beam II (17) in the conversion beam (28).
8. The vehicle section steel frame covered and reinforced concrete frame under cover hybrid structure according to claim 1, characterized in that the conversion beam one (281) and the bracket tie beam (7) are distributed uniformly or at intervals.
CN201810896092.4A 2018-08-08 2018-08-08 Vehicle section covered steel frame and covered reinforced concrete frame mixed structure Active CN108824484B (en)

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CN110173120B (en) * 2019-06-24 2021-05-04 北京市市政工程设计研究总院有限公司 Construction method for quickly hoisting steel column cap of upper cover by steel concrete mixed structure
CN112095799A (en) * 2020-08-27 2020-12-18 中国建筑第八工程局有限公司 Ultra-large span conversion component and construction method thereof

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