CN113136946A - Self-supporting assembly type seawater sea sand concrete frame structure and construction method - Google Patents
Self-supporting assembly type seawater sea sand concrete frame structure and construction method Download PDFInfo
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- CN113136946A CN113136946A CN202110339150.5A CN202110339150A CN113136946A CN 113136946 A CN113136946 A CN 113136946A CN 202110339150 A CN202110339150 A CN 202110339150A CN 113136946 A CN113136946 A CN 113136946A
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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
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
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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
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
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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
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
- E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
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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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5825—Connections for building structures in general of bar-shaped building elements with a closed cross-section
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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Abstract
The invention provides a self-supporting assembly type seawater sea sand concrete frame structure and a construction method, wherein the frame structure comprises prefabricated columns and prefabricated beams; wherein the prefabricated column is a string-burning column, and a longitudinal steel pipe penetrates through the prefabricated column; welding a pair of first transverse steel pipes on the longitudinal steel pipe in each beam-column joint area; the extending end of each first transverse steel pipe is welded with a first connecting steel plate; a second transverse steel pipe extending along the length direction of the precast beam is pre-buried in the precast beam; and a second connecting steel plate is welded at both ends of the second transverse steel pipe. According to the invention, the first transverse steel pipe and the second transverse steel pipe are connected through the connecting steel plate and the high-strength friction type bolt, so that the connection between the prefabricated column and the prefabricated beam is realized, the prefabricated beam is not required to be provided with temporary support, and the defect that the prefabricated beam needs to be vertically supported in the construction process of the assembly type frame structure is overcome.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a self-supporting assembly type seawater sea sand concrete frame structure and a construction method.
Background
The assembly type concrete frame structure saves templates, improves construction environment, shortens construction period, and is suitable for building forms of factory buildings, office buildings and the like. In the traditional construction, because the precast beam has longer span and larger self weight, a certain temporary support is usually required to be arranged below the precast beam, and when the temporary support is arranged, the vertical lower part of a supported body needs to be cleaned firstly, so that the foundation of the supporting structure is flat and hard; then the supporting structure is reliably connected with the existing ground structure to fix the temporary support. In the construction process, the longitudinal and transverse spacing of the temporary supports and the stability of the temporary supports need to be met; the process of installing and dismantling the temporary support is complex and strict, certain potential safety hazards exist in the installation of workers, time and labor are consumed for installing the temporary support, and the building construction efficiency is reduced.
Therefore, for those skilled in the art, how to implement self-supporting construction of the fabricated frame structure to improve the construction efficiency of the fabricated frame structure becomes a technical problem that needs to be solved urgently.
Disclosure of Invention
The invention aims to provide a self-supporting assembly type seawater sea sand concrete frame structure and a construction method. In order to achieve the purpose, the invention adopts the following technical scheme:
a self-supporting fabricated seawater sea sand concrete frame structure, comprising:
the prefabricated column is in a form of a string-burning column and is formed by pouring seawater sea sand concrete, and a longitudinal steel pipe extending along the length direction of the prefabricated column penetrates through the prefabricated column; the FRP cloth is wrapped in the contact area of the longitudinal steel pipe and the seawater sea sand concrete; both ends of the longitudinal steel pipe are exposed outside the prefabricated column; a pair of first transverse steel pipes are welded in each beam column joint area of the longitudinal steel pipe, and the pair of first transverse steel pipes are positioned on two sides of the center line of the longitudinal steel pipe in each beam column joint area; the first transverse steel pipes extend along the direction far away from the longitudinal steel pipes, and a first connecting steel plate is welded at the extending end of each first transverse steel pipe;
the precast beam is formed by pouring seawater sea sand concrete, two ends of the precast beam are provided with beam end U-shaped key grooves, and the beam end U-shaped key grooves extend into the precast beam from the end part of the precast beam; a second transverse steel pipe extending along the length direction of the precast beam is pre-buried in the precast beam; the FRP cloth is wrapped in the area where the second transverse steel pipe is in contact with the seawater sea sand concrete; the length of the second transverse steel pipe is equal to the horizontal distance of the adjacent first connecting steel plates which is minus 20 mm;
both ends of the second transverse steel pipe extend into the corresponding beam end U-shaped key grooves; two ends of the second transverse steel pipe are welded with a second connecting steel plate, one second connecting steel plate is connected with one first connecting steel plate in the prefabricated column through a high-strength friction bolt, and the other second connecting steel plate is connected with one first connecting steel plate in the adjacent prefabricated column through a high-strength friction bolt;
a construction through groove transversely penetrating through the beam end U-shaped key groove is formed in the beam end U-shaped key groove; the outer edge of the second connecting steel plate is aligned with the center line of the corresponding construction through groove.
Preferably, in a pair of prefabricated beams connected with the prefabricated column, a plurality of node connecting steel bars are placed at the bottom of the beam-end U-shaped key slot, extend into a beam-column node area and extend into the other beam-end U-shaped key slot.
Preferably, the top of each of the two precast beams connected with the precast column is post-cast with ultra-high performance concrete to form a precast beam superposed layer, and a plurality of through-length steel bars on the upper portions of the precast beams are placed in the precast beam superposed layer.
Preferably, a plurality of longitudinal FRP ribs at the lower part of the precast beam are pre-embedded in the precast beam, and the longitudinal FRP ribs at the lower part of the precast beam do not extend into the beam column joint area.
Preferably, a plurality of prefabricated column longitudinal FRP ribs are pre-embedded in the prefabricated columns, the prefabricated column longitudinal FRP ribs extend along the length direction of the prefabricated columns, and two ends of the prefabricated column longitudinal FRP ribs are exposed outside the prefabricated columns.
Preferably, the distance that the first transverse steel pipe extends out of the precast column is not less than 0.5 times of the height of the whole section of the precast beam.
Preferably, the inner wall of the beam-end U-shaped key groove is roughened.
Preferably, the length of the beam-end U-shaped key groove is plus 50mm, and the length of the node connecting steel bar extending into the beam-end U-shaped key groove can be adjusted according to building modulus.
A construction method of a self-supporting assembly type seawater sea sand concrete frame structure comprises the following steps:
step 1: hoisting all prefabricated columns in the frame structure to a preset position, connecting the longitudinal steel pipes exposed out of the lower parts of the prefabricated columns with embedded parts at the top of the foundation through high-strength friction type bolts and electric welding, connecting the longitudinal FRP ribs exposed out of the lower parts of the prefabricated columns with the embedded ribs at the top of the foundation through sleeves, and then arranging temporary oblique supports for the prefabricated columns;
step 2: hoisting a precast beam, and adjusting the installation position of the precast beam to ensure that second connecting steel plates in U-shaped key grooves at two ends of the precast beam are respectively aligned with first connecting steel plates on first transverse steel pipes on two adjacent precast columns of the precast beam;
and step 3: installing high-strength friction type bolts at the corresponding construction through grooves in the U-shaped key grooves at the beam ends to connect the first connecting steel plates and the second connecting steel plates;
and 4, step 4: hoisting the precast beam on the other side of the precast column, and adjusting the installation position of the precast beam to ensure that the second connecting steel plates in the U-shaped key grooves on the two ends of the precast beam are respectively aligned with the first connecting steel plates on the first transverse steel pipes on the two adjacent precast columns of the precast beam;
and 5: installing high-strength friction type bolts at the corresponding construction through grooves in the U-shaped key grooves at the beam ends to connect the first connecting steel plates and the second connecting steel plates;
step 6: placing node connecting steel bars and through long steel bars on the upper part of the precast beam;
and 7: pouring concrete at the end part of the precast beam, the beam column joint area and the upper part of the precast beam; the concrete poured adopts the ultra-high performance concrete without shrinkage or micro-expansion.
Compared with the prior art, the invention has the advantages that:
(1) the beam column node and the precast beam directly bear construction load through the connection between the steel pipes, the defect that the precast beam needs to be supported temporarily in the whole process of lifting and installation of the fabricated frame structure can be overcome, rapid assembly under complete self-support is realized, and the working efficiency is improved. Wherein, the construction load comprises dead weight, load of constructors and the like.
(2) All set up the steel pipe in precast beam, precast column, compared in the concrete structure that sets up FRP muscle entirely, utilized good ductility and the high strength of steel, improved this structure power consumption ability, shear capacity and rigidity.
(3) The prefabricated beam and the prefabricated column of the frame structure are both poured by seawater and sea sand concrete, so that local materials can be obtained, and the cost of ocean engineering construction is reduced; the beam column joint area of the frame structure is cast by ultrahigh-performance concrete, so that the comprehensive performance of the structure is improved.
Drawings
FIG. 1 is a cross-sectional view of a precast beam of a self-supporting fabricated seawater sea sand concrete frame according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a precast beam of a self-supporting fabricated seawater sea sand concrete frame according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a self-supporting fabricated seawater sea sand concrete frame in accordance with one embodiment of the present invention;
FIG. 4 is a cross section A of the end part of the precast beam at the through groove for construction;
FIG. 5 is a center section B of the precast beam;
fig. 6 is precast beam end section C.
The prefabricated beam comprises 1-a prefabricated beam, 2-a prefabricated beam FRP grid stirrup, 3-FRP cloth, 4-a beam end U-shaped key groove, 5-a second transverse steel pipe, 6-a fillet weld, 7-a second connecting steel plate, 8-seawater sea sand concrete, 9-a prefabricated beam lower longitudinal FRP rib, 10-a prefabricated beam laminated layer, 11-a prefabricated column, 12-a prefabricated column longitudinal FRP rib, 13-a prefabricated column FRP grid stirrup, 14-a prefabricated beam upper through long steel bar, 15-a node connecting steel bar, 16-a high-strength friction type bolt, 17-ultrahigh-performance concrete, 18-a first transverse steel pipe, 19-a longitudinal steel pipe and 20-a first connecting steel plate.
Detailed Description
The present invention will now be described in more detail with reference to the accompanying schematic drawings, in which preferred embodiments of the invention are shown, it being understood that one skilled in the art may modify the invention herein described while still achieving the advantageous effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.
As shown in fig. 1-6, a self-supporting fabricated seawater sea sand concrete frame structure, in which a prefabricated column is a string-burning column, and the bottom of the frame structure is connected with a foundation through a bolt and a sleeve after hoisting.
The description is given by taking one self-supporting fabricated seawater sea sand concrete frame structure beam column node as an example, and the self-supporting fabricated seawater sea sand concrete frame structure beam column node comprises: a precast column 11 and a pair of precast beams 1.
Prefabricated post 11 is pour by sea water sea sand concrete 8 and is formed, and the stirrup adopts FRP net hoop, prefabricated post FRP net stirrup 13 promptly, and prefabricated post FRP net stirrup 13 interval is encrypted at 11 tip of prefabricated post. The prefabricated pillars 11 are not smaller than 400mm x 400mm in size. Namely, the prefabricated column 11 is a string-firing column, does not need to be connected with an upper column and a lower column, and is a prefabricated part.
A longitudinal steel pipe 19 extending along the length direction of the prefabricated column penetrates through the prefabricated column 11; the FRP cloth 3 is wrapped in the contact area of the longitudinal steel pipe 19 and the seawater sea sand concrete 8.
Both ends of the longitudinal steel pipe 19 are exposed outside the prefabricated column 11; a pair of first transverse steel pipes 18 are welded on each beam-column joint area of the longitudinal steel pipe 19 through fillet welds 6, and the pair of first transverse steel pipes 18 are positioned on two sides of the central line of the longitudinal steel pipe 19; the first transverse steel pipes 18 extend in a direction away from the longitudinal steel pipes 19, and the extending end of each first transverse steel pipe 18 is welded with a first connecting steel plate 20 by the fillet weld 6. Preferably, the first transversal steel pipe 18 extends out of the precast column by a distance not less than 0.5 times the height of the corresponding precast beam 1 in its full section.
A plurality of prefabricated column longitudinal FRP ribs 12 are pre-buried in the prefabricated column 11, the prefabricated column longitudinal FRP ribs 12 extend along the length direction of the prefabricated column 11, and two ends of the prefabricated column longitudinal FRP ribs 12 are exposed outside the prefabricated column 11.
A beam end U-shaped key groove 4 is respectively arranged at two end parts of the precast beam 1, and the beam end U-shaped key groove 4 extends into the precast beam 1 from the end part of the precast beam 1.
Preferably, the inner wall of the U-shaped key groove 4 at the beam end is roughened, and the roughness of the concrete surface meets the requirements of the current regulations. The length of the beam-end U-shaped key groove 4 is plus 50mm, and the length of the node connecting steel bar 15 extending into the key groove can be adjusted according to building modulus. The width of the beam-end U-shaped key groove 4 is not less than 1/3 of the width of the precast beam 1 and not less than 150mm, the wall thickness of the precast concrete of the beam-end U-shaped key groove 4 is not less than the sum of the diameter of the waist rib and 2 times of the concrete protective layer, is not less than 60mm, and is not more than 1/3 of the width of the precast beam 1.
A second transverse steel pipe 5 extending along the length direction of the precast beam 1 is pre-buried in the precast beam 1; the FRP cloth 3 is wrapped in the contact area of the second transverse steel pipe 5 and the seawater sea sand concrete 8. Preferably, the length of the second transverse steel pipe 5 is-20 mm of the horizontal distance between two adjacent first connecting steel plates 20. Here, the "adjacent two first connecting steel plates 20" refer to two first connecting steel plates on the same first transverse steel pipe 18.
Both ends of the second transverse steel pipe 5 extend into the corresponding beam end U-shaped key grooves 4; both ends of the second transverse steel pipe 5 are welded with a second connecting steel plate 7 by fillet welds 6 (namely, 2 second connecting steel plates 7 are connected on one second transverse steel pipe 5), the second connecting steel plate 7 at one end of the precast beam 1 is connected with a first connecting steel plate 20 on the precast column 11 by high-strength friction type bolts 16, and the second connecting steel plate 7 at the other end of the precast beam 1 is connected with a corresponding first connecting steel plate 20 on the adjacent precast column by high-strength friction type bolts 16. Wherein "adjacent prefabricated column" means another prefabricated column arranged adjacent and in parallel to the prefabricated column.
A construction through groove transversely penetrating through the beam-end U-shaped key groove 4 is formed in the beam-end U-shaped key groove 4, and the width of the construction through groove is 100 mm; the outer edge of the second connecting steel plate 7 is aligned with the center line of the corresponding construction through groove. I.e. the construction through-groove penetrates the precast beam 1.
A plurality of longitudinal FRP ribs 9 at the lower part of the precast beam are pre-embedded in the precast beam 1, and the longitudinal FRP ribs 9 at the lower part of the precast beam do not extend into the beam column joint area.
In a pair of precast beams 1 connected with the precast column 11, a plurality of node connecting reinforcing steel bars 15 are placed at the bottom of a beam end U-shaped key groove 4, and the node connecting reinforcing steel bars 15 extend into a beam column node area and extend into the other beam end U-shaped key groove 4.
The top of two precast beams 1 connected with precast column 11 all sets up post-cast ultra high performance concrete 17 and the precast beam superimposed layer 10 that forms, pre-buried a precast beam upper portion leads to long reinforcing bar 14 in precast beam superimposed layer 10. Namely, the precast beam superposed layer 10 refers to a layer of concrete on the precast beam 1 after pouring.
In this embodiment, several joint connecting reinforcements 15 are locally arranged in the joint area of the beam column.
The construction method of the self-supporting assembly type seawater sea sand concrete frame structure comprises the following steps:
(1) hoisting all prefabricated columns 11 in the frame structure to a designed position, connecting longitudinal steel pipes 19 exposed at the lower parts of the prefabricated columns with embedded parts at the top of the foundation through high-strength friction type bolts 16 and fillet welds 6, connecting prefabricated column longitudinal FRP ribs 12 exposed at the lower parts of the prefabricated columns with embedded ribs at the top of the foundation through sleeves, and then setting temporary oblique supports for the prefabricated columns 11. The upper prefabricated column 11 and the lower prefabricated column 11 are connected through the prefabricated column longitudinal FRP ribs 12 and the longitudinal steel pipes 19 in the same way.
(2) And hoisting a precast beam 1, and adjusting the installation position of the precast beam 1, so that the second connecting steel plates 7 in the U-shaped key grooves 4 at the two ends of the precast beam 1 are respectively aligned with the first connecting steel plates 20 on the two adjacent precast columns 11.
(3) And mounting high-strength friction type bolts 16 at the corresponding construction through grooves in the beam-end U-shaped key grooves 4 to connect the second connecting steel plates 7 and the first connecting steel plates 20.
(4) And hoisting the other precast beam 1, and adjusting the installation position of the precast beam 1, so that the second connecting steel plates 7 in the U-shaped key grooves 4 at the two ends of the precast beam 1 are respectively aligned with the first connecting steel plates 20 on the two adjacent precast columns 11.
(5) And mounting high-strength friction type bolts 16 at the corresponding construction through grooves in the beam-end U-shaped key grooves 4 to connect the second connecting steel plates 7 and the first connecting steel plates 20.
(6) And placing node connecting steel bars 15 and the upper through long steel bars 14 of the precast beam.
(7) Pouring ultrahigh-performance concrete at the end part of the precast beam 1, the beam column joint area and the upper part of the precast beam 1; the concrete for pouring adopts the ultra-high performance concrete 17 without shrinkage or micro expansion.
The end part of the precast beam 1 is subjected to stirrup encryption, the length of the encryption area is taken according to the length of the encryption area of the cast-in-place beam and is not less than the length of the key groove plus 100mm, and the inner reinforcement is guaranteed not to be disturbed when the cast concrete is vibrated;
the configuration of the friction type high-strength bolts 16 on the second connecting steel plates 7 at the two ends of the precast beam 1 is determined by construction load calculation, and meets the current standard requirements.
When the length of the connecting steel bar (the node connecting steel bar 15) in the beam-end U-shaped key groove 4 is linear, the requirements of concrete structure design specification GB50010-2010 and concrete structure construction drawing plane integral representation method drawing rules and construction detail drawing 16G101-1 current regulations need to be met; when the diameter of the connecting steel bar is larger than 22mm, bending anchoring or end plate anchoring is adopted.
(8) And (5) repeating the step (2) to the step (7), and finally completing the installation work of the whole prefabricated seawater sea sand concrete frame structure.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The utility model provides a self-supporting assembled sea water sea sand concrete frame construction which characterized in that includes:
the prefabricated column is in a form of a string-burning column and is formed by pouring seawater sea sand concrete, and a longitudinal steel pipe extending along the length direction of the prefabricated column penetrates through the prefabricated column; the FRP cloth is wrapped in the contact area of the longitudinal steel pipe and the seawater sea sand concrete; both ends of the longitudinal steel pipe are exposed outside the prefabricated column; a pair of first transverse steel pipes are welded in each beam column joint area of the longitudinal steel pipe, and the pair of first transverse steel pipes are positioned on two sides of the center line of the longitudinal steel pipe in each beam column joint area; the first transverse steel pipes extend along the direction far away from the longitudinal steel pipes, and a first connecting steel plate is welded at the extending end of each first transverse steel pipe;
the precast beam is formed by pouring seawater sea sand concrete, two ends of the precast beam are provided with beam end U-shaped key grooves, and the beam end U-shaped key grooves extend into the precast beam from the end part of the precast beam; a second transverse steel pipe extending along the length direction of the precast beam is pre-buried in the precast beam; the FRP cloth is wrapped in the area where the second transverse steel pipe is in contact with the seawater sea sand concrete; the length of the second transverse steel pipe is equal to the horizontal distance of the adjacent first connecting steel plates which is minus 20 mm;
both ends of the second transverse steel pipe extend into the corresponding beam end U-shaped key grooves; two ends of the second transverse steel pipe are welded with a second connecting steel plate, one second connecting steel plate is connected with one first connecting steel plate in the prefabricated column through a high-strength friction bolt, and the other second connecting steel plate is connected with one first connecting steel plate in the adjacent prefabricated column through a high-strength friction bolt;
a construction through groove transversely penetrating through the beam end U-shaped key groove is formed in the beam end U-shaped key groove; the construction through groove center line is aligned with the outer edge of the second connecting steel plate.
2. The self-supporting fabricated seawater sea sand concrete frame structure of claim 1, wherein a plurality of node connecting bars are placed at the bottom of one of the beam-end U-shaped key slots of a pair of precast beams connected to the precast columns, and the node connecting bars extend into the beam-column node areas and into the other of the beam-end U-shaped key slots.
3. The self-supporting fabricated seawater sea sand concrete frame structure of claim 2, wherein the top of each of two precast beams connected with the precast column is post-poured with ultra-high performance concrete to form a precast beam laminated layer, and through-length steel bars on the upper parts of the precast beams are placed in the precast beam laminated layer.
4. The self-supporting assembled seawater and seawater sand concrete frame structure as claimed in claim 3, wherein a plurality of precast beam lower longitudinal FRP bars are pre-embedded in the precast beam, and the precast beam lower longitudinal FRP bars do not extend into the beam-column joint area.
5. The self-supporting assembled seawater sea sand concrete frame structure of claim 3, wherein a plurality of prefabricated column longitudinal FRP ribs are embedded in the prefabricated columns, the prefabricated column longitudinal FRP ribs extend along the length direction of the prefabricated columns, and both ends of the prefabricated column longitudinal FRP ribs are exposed outside the prefabricated columns.
6. The self-supporting fabricated seawater sea sand concrete frame structure of claim 3, wherein the distance that the first transverse steel pipe protrudes out of the precast column is not less than 0.5 times the full section height of the precast beam.
7. The self-supporting fabricated seawater sea sand concrete frame structure of claim 3, wherein the inner walls of the beam-end U-shaped key grooves are roughened.
8. The self-supporting fabricated seawater sea sand concrete frame structure of claim 3, wherein the length of the beam-end U-shaped key groove takes +50 mm of the length of the node connecting steel bar extending into the beam-end U-shaped key groove, and can be adjusted according to building modulus.
9. A construction method of a self-supporting fabricated seawater sea sand concrete frame structure based on any one of claims 3 to 8, characterized by comprising the following steps:
step 1: hoisting all prefabricated columns in the frame structure to a preset position, connecting the longitudinal steel pipes exposed out of the lower parts of the prefabricated columns with embedded parts at the top of the foundation through high-strength friction type bolts and electric welding, connecting the longitudinal FRP ribs exposed out of the lower parts of the prefabricated columns with the embedded ribs at the top of the foundation through sleeves, and then arranging temporary oblique supports for the prefabricated columns;
step 2: hoisting a precast beam, and adjusting the installation position of the precast beam to ensure that second connecting steel plates in U-shaped key grooves at two ends of the precast beam are respectively aligned with first connecting steel plates on first transverse steel pipes on two adjacent precast columns of the precast beam;
and step 3: installing high-strength friction type bolts at the corresponding construction through grooves in the U-shaped key grooves at the beam ends to connect the first connecting steel plates and the second connecting steel plates;
and 4, step 4: hoisting the precast beam on the other side of the precast column, and adjusting the installation position of the precast beam to ensure that the second connecting steel plates in the U-shaped key grooves on the two ends of the precast beam are respectively aligned with the first connecting steel plates on the first transverse steel pipes on the adjacent precast columns of the precast beam;
and 5: installing high-strength friction type bolts at the corresponding construction through grooves in the U-shaped key grooves at the beam ends to connect the first connecting steel plates and the second connecting steel plates;
step 6: placing node connecting steel bars and through long steel bars on the upper part of the precast beam;
and 7: pouring concrete at the end part of the precast beam, the beam column joint area and the upper part of the precast beam; the concrete poured adopts the ultra-high performance concrete without shrinkage or micro-expansion.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114837297A (en) * | 2022-05-31 | 2022-08-02 | 福州大学 | Novel ocean engineering structure and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2010084503A (en) * | 2008-09-02 | 2010-04-15 | Shimizu Corp | Structure and method for joining concrete column and steel-frame beam |
| KR20110138309A (en) * | 2010-06-19 | 2011-12-27 | 최하정 | Rigid frame building structure using circular tubes and construction method with it |
| CN104499568A (en) * | 2014-12-19 | 2015-04-08 | 东南大学 | Square steel pipe fabricated column-prefabricated superposed beam integrally-fabricated frame and construction method |
| CN108775083A (en) * | 2018-07-09 | 2018-11-09 | 东南大学 | The assembly concrete frame structure and construction method connected outside precast beam plastic hinge region |
| CN209742073U (en) * | 2019-02-28 | 2019-12-06 | 沈阳建筑大学 | Assembly type self-resetting frame system connected by FRP (fiber reinforced plastic) pipes |
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2021
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| JP2010084503A (en) * | 2008-09-02 | 2010-04-15 | Shimizu Corp | Structure and method for joining concrete column and steel-frame beam |
| KR20110138309A (en) * | 2010-06-19 | 2011-12-27 | 최하정 | Rigid frame building structure using circular tubes and construction method with it |
| CN104499568A (en) * | 2014-12-19 | 2015-04-08 | 东南大学 | Square steel pipe fabricated column-prefabricated superposed beam integrally-fabricated frame and construction method |
| CN108775083A (en) * | 2018-07-09 | 2018-11-09 | 东南大学 | The assembly concrete frame structure and construction method connected outside precast beam plastic hinge region |
| CN209742073U (en) * | 2019-02-28 | 2019-12-06 | 沈阳建筑大学 | Assembly type self-resetting frame system connected by FRP (fiber reinforced plastic) pipes |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114837297A (en) * | 2022-05-31 | 2022-08-02 | 福州大学 | Novel ocean engineering structure and construction method thereof |
| CN114837297B (en) * | 2022-05-31 | 2023-01-03 | 福州大学 | Ocean engineering structure and construction method thereof |
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| CN113136946B (en) | 2022-05-10 |
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