CN115341714A - Fabricated hybrid beam with steel pipe concrete structure as connecting node and method - Google Patents
Fabricated hybrid beam with steel pipe concrete structure as connecting node and method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000010276 construction Methods 0.000 claims abstract description 56
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 claims abstract description 21
- 239000011376 self-consolidating concrete Substances 0.000 claims abstract description 14
- 230000000712 assembly Effects 0.000 claims abstract description 4
- 238000000429 assembly Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims description 91
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- 238000009434 installation Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 7
- 210000003141 lower extremity Anatomy 0.000 claims description 5
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- 238000005056 compaction Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 229910000746 Structural steel Inorganic materials 0.000 claims description 3
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 8
- 210000003205 muscle Anatomy 0.000 description 6
- 230000007704 transition Effects 0.000 description 5
- 238000009417 prefabrication Methods 0.000 description 3
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- 238000010008 shearing Methods 0.000 description 2
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- 238000005452 bending Methods 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—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
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/36—Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
- E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/168—Spacers connecting parts for reinforcements and spacing the reinforcements from the form
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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
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
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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
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/04—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for lintels, beams, or transoms to be encased separately; Special tying or clamping means therefor
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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
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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
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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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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- 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
- E04B2001/5875—Connections for building structures in general of bar-shaped building elements using exterior clamping plates or shells
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Abstract
The invention discloses a fabricated hybrid beam taking a steel pipe concrete structure as a connecting node and a method. The fabricated hybrid beam comprises a hybrid beam prefabricated unit and a connecting structure with the fabricated hybrid column; the middle section of the precast unit of the hybrid beam is a reinforced concrete beam, the left end and the right end of the precast unit are provided with steel pipe assemblies, and the inner extension sections of the steel pipe assemblies are effectively connected with the reinforced concrete beam through constructional measures; the steel pipe assembly extending section enables the precast unit of the hybrid beam and the fabricated hybrid column to realize strong connection of a steel pipe concrete structure form through butt joint of the column bracket and filling of self-compacting concrete in the steel pipe cavity; the construction method comprises the steps of factory manufacturing of the prefabricated unit of the assembled mixed beam and field assembly of the prefabricated unit of the assembled mixed beam. The fabricated hybrid beam structure has the advantages of excellent stress performance, rapid construction, mature and simple process, reliable and controllable quality and obvious comprehensive cost performance advantage.
Description
Technical Field
The invention relates to a precast concrete beam of building engineering and a method thereof, in particular to a fabricated hybrid beam taking a steel pipe concrete structure as a connecting node and a construction method thereof.
Background
The assembly structure not only occupies a basic position in an assembly type building integrated system, but also plays a leading role in 'leading-up soldiers' for realizing the building industrialization target. At present, the fabricated structure system mainly comprises a fabricated concrete structure and a fabricated steel structure, wherein the fabricated concrete structure technology has more research and development investment in recent years and achieves certain progress, but there is still a gap between the control targets such as distance quality, environmental protection, efficiency and cost. The technical standard of the fabricated concrete has more limit or strict requirements on the application range of buildings, such as building height, seismic intensity, a reinforced area at the bottom of a shear wall, a core tube, a built-in area of an upper structure, a first-layer column and other key parts, and shows more judicious scientific attitude for the existing fabricated concrete structure technology; in terms of engineering application, the conventional fabricated concrete structure mainly uses a plane beam slab system (secondary beam and floor slab), and a vertical structure system such as a fabricated integral frame structure, a fabricated integral frame-shear wall structure, a fabricated integral shear wall structure and the like is still rarely adopted, so that the overall prefabrication rate and the assembly rate of the fabricated concrete structure are low.
The existing fabricated concrete structure technology is generally split around the technical path of 'equal cast-in-place', and in terms of structural performance, the existing fabricated concrete structure can only be 'infinitely close to cast-in-place' in theory, but according to the existing technical standard, the existing fabricated concrete structure can achieve 'close to cast-in-place' in engineering practice, and is not easy to achieve.
Taking the assembly of an integral concrete superposed beam as an example, the beam and a column or a wall and other prefabricated components are connected through technologies such as post-cast concrete, a reinforcing steel bar anchoring plate and the like, wherein a joint surface between the prefabricated beam and a post-cast concrete superposed layer is provided with a rough surface, a key groove is arranged on the end surface of the prefabricated beam, and the rough surface is suitable for arrangement, the shearing bearing capacity of a vertical joint at the end of the superposed beam is checked, and the stress performance is greatly weakened compared with a full cast-in-place beam with the same section; in the prefabricated column superposed beam frame node, the longitudinal stress steel bars at the lower part of the beam can only be anchored or connected in a limited post-cast area, particularly the top node of the frame column cannot be sufficiently anchored or connected with the longitudinal stress steel bars like a cast-in-place node. When the precast beam is installed, a temporary support frame, a temporary steel corbel or a temporary fixing measure for the temporary support frame and the temporary steel corbel; a beam column joint area needs to take a mold sealing measure; when the beam-end stirrups of the superposed frame beams with the earthquake-resistant grades of one and two adopt integrally closed stirrups, the longitudinal stressed steel bars on the upper parts of the beams need to pass through the closed stirrups for arrangement, so that the construction is difficult; when the anti-torsion precast beam is arranged, the longitudinal bar of the beam web needs to be lengthened and anchored by adopting a mechanical connecting joint.
Compared with the assembled integral concrete superposed beam, the steel-concrete assembled hybrid beam (called hybrid beam for short) has the advantages of convenient construction, reliable connection quality, short construction period, low cost and the like because the beam column joints can adopt a steel structure connection mode because the two ends of the beam are provided with the I-shaped steel joints such as I-shaped steel and the like. The node not only realizes the standardization and modularization of the building components in a factory, but also can realize the rapid assembly on a construction site, and really realizes the standardized design, the factory production and the assembly construction. The current research results show that although the so-called connecting transition section of the hybrid beam anchored into the reinforced concrete section adopts a steel-concrete combined structure, the connecting section mostly adopts a pure steel structure as a main part, so that the problems of attenuation of beam end rigidity of the hybrid beam, insufficient ductility of a node structure and the like are caused, and the stress performance can not reach the aim of equal cast-in-place.
In order to realize the design principle of 'strong nodes and weak components', ensure that the spliced parts of the beam-column node areas have enough strength, rigidity and ductility, and meet the requirements on bearing capacity and deformation capacity under normal use conditions and earthquake action, the invention is based on the existing design and construction technology, takes a steel-concrete composite structure theory, particularly a steel pipe concrete theory as guidance, develops a new way on the connection problem of the assembled type mixed beam and the wall column, creatively introduces the steel pipe concrete connection nodes, achieves the stress performance higher than that of cast-in-place, and promotes the final development of the assembled type integral concrete structure to a fully assembled type concrete structure.
Disclosure of Invention
In order to solve the problems existing in the background technology, the invention aims to provide a steel-concrete assembled hybrid beam with superior structural stress performance and good economical efficiency and a set of construction method with mature technology, convenient installation and reliable connection, and solves the problems of the existing assembled integral concrete composite beam or the hybrid beam taking a pure steel structure as a connecting section in the aspects of design, construction, quality inspection and the like; the realization of control targets of quality, environmental protection, efficiency, cost and the like of the fabricated concrete structure is promoted.
The fabricated hybrid beam structure has the advantages of excellent stress performance, quick construction, mature and simple process, reliable and controllable quality and obvious comprehensive cost performance advantage.
In order to achieve the purpose, the invention adopts the following technical scheme:
1. a fabricated hybrid beam with a steel pipe concrete structure as a connecting node comprises:
the fabricated hybrid beam comprises a hybrid beam prefabricated unit and a connecting structure between the hybrid beam prefabricated unit and the fabricated hybrid column; the interlude of precast unit of hybrid beam is reinforced concrete beam, and both ends set up steel pipe component respectively about precast unit of hybrid beam, and steel pipe component is partly to bury in reinforced concrete beam as the internal extension section, and another part stretches out in reinforced concrete beam as overhanging section through post bracket and assembled hybrid column connection, variable cross section between steel pipe component's the internal extension section and the overhanging section.
The reinforced concrete beam comprises precast unit concrete poured along the beam direction, and an upper angle bar, an upper middle steel bar, a lower angle bar, a lower middle steel bar, a longitudinal construction steel bar and a stirrup which are embedded in the precast unit concrete; upper corner reinforcements are respectively arranged at two upper corners of the precast unit concrete, and an upper middle reinforcing steel bar is arranged between the two upper corner reinforcements at the two upper corners; lower corner ribs are respectively arranged at two lower corners of the precast unit concrete, and a lower middle steel bar is arranged between the two lower corner ribs at the two upper corners; longitudinal construction steel bars are arranged between the upper corner ribs and the lower corner ribs on each same side of two sides of the precast unit concrete, and stirrups are arranged on the peripheries of the upper corner ribs and the lower corner ribs at the four corners; and arranging tie bars between the stirrups at two sides and the intersections of the longitudinal construction steel bars in the precast unit concrete without the steel pipe assembly for connection.
The steel pipe assembly is formed by welding an upper flange plate, a lower flange plate and webs symmetrically arranged on two sides in a rectangular surrounding manner; the inner sides of an upper flange plate, a lower flange plate and a web plate of the steel pipe assembly are all welded with shear-resistant studs; in the outward extending section of the steel pipe assembly, the lower flange plates are respectively welded and fixed with the webs on two sides, and the upper flange plate moves inwards relative to the lower flange plates and the webs, so that the outward extending section forms a U-shaped opening section; in the section of stretching in of steel pipe subassembly, the web of upper flange board, lower flange board and both sides reduces the steel sheet width, and the welding of the web at upper flange board, lower flange board and both sides has stiffening rib between the adjacent both along circumference at the terminal tip of burying the reinforced concrete roof beam underground for it is regional to form the variable cross section chamfer outside the stiffening rib in the section four corners of stretching in of steel pipe subassembly.
The upper corner bar and the upper middle bar of the reinforced concrete beam are welded with the upper flange plate of the steel pipe assembly; the lower corner bar and the lower middle bar of the reinforced concrete beam are welded with the lower flange plate of the steel pipe assembly; and the longitudinal construction steel bars of the reinforced concrete beam are welded with the web plate of the steel pipe assembly.
And a feeding conduit and a flash conduit are respectively arranged in the variable cross-section chamfer area.
The connection structure of the precast unit of the mixed beam and the column specifically comprises: including setting up the post bracket, the post bracket mainly by the bracket web of bracket upper limb listrium, bracket lower limb listrium and bilateral symmetry arrangement enclose with the rectangle through the welding and close and form, the one end and the assembled hybrid column welding of post bracket, the other end respectively with the overhanging section welding of steel pipe component of hybrid beam prefabricated unit.
The bracket webs of bracket upper flange plate, bracket lower flange plate and both sides respectively adopt groove welding to correspond the welding with the upper flange plate of the steel pipe assembly overhanging section of hybrid beam prefabricated unit, the web of lower flange plate and both sides, pour into self-compaction concrete in the cavity of post bracket and steel pipe assembly.
2. A construction method of a fabricated hybrid beam comprises the following steps:
the method comprises a factory manufacturing process of the mixed beam prefabricated unit and a field assembly process of the assembled mixed beam, wherein the mixed beam prefabricated unit is prefabricated through the factory manufacturing process, and then the mixed beam prefabricated unit is transported to the field to be subjected to the field assembly process.
The factory manufacturing process of the hybrid beam prefabricated unit comprises the following steps:
the method comprises the following steps:
cutting and chamfering plates of an upper flange plate, a lower flange plate and a web plate of the steel pipe assembly, welding shear studs, and manufacturing bolt holes for connecting plates for installation on the web plate;
welding the upper flange plate and the lower flange plate serving as main materials to the web plate, enclosing the upper flange plate into a rectangular steel pipe in an inward-moving manner, welding upper stiffening ribs at the end parts of the upper flange plate, the lower flange plate and the web plate positioned at the inward extending section of the steel pipe assembly, and welding a temporary fixing plate between the top parts of the web plates positioned at two sides of the outward extending section of the steel pipe assembly;
binding and manufacturing a reinforcement cage consisting of an upper corner rib, an upper middle reinforcement, a lower corner rib, a lower middle reinforcement, a longitudinal structural reinforcement and a stirrup, welding the upper corner rib and the upper middle reinforcement with the upper flange plate, welding the lower corner rib and the lower middle reinforcement with the lower flange plate, welding the longitudinal structural reinforcement with the web plate, and arranging the stirrup in full length;
putting a feeding guide pipe and a flash guide pipe into the variable cross-section chamfer area, and sealing the pipe orifice;
supporting steel templates for pouring concrete of the mixed beam prefabricated unit, wherein the supporting steel templates are embedded into steel pipes at the left end and the right end of the prefabricated unit;
step six, pouring concrete in cavities of the column bracket and the steel pipe assembly to form prefabricated unit concrete, and vibrating tightly;
step seven, demolding after molding and curing to form a hybrid beam prefabricated unit;
and step eight, spot welding backing plates for welding at the end parts of the upper flange plate and the lower flange plate at the outer extending section of the steel pipe assembly of the hybrid beam prefabricated unit to complete the factory manufacturing process of the hybrid beam prefabricated unit.
The field assembly process of the fabricated hybrid beam comprises the following steps:
firstly, mounting an assembled mixing column and a column bracket thereof, welding a bracket lower flange plate and a bracket web plate in the column bracket with the assembled mixing column, temporarily fixing the bracket upper flange plate on the upper parts of the bracket web plates at two sides by welding a temporary fixing plate, and connecting the bracket web plate with one side of a connecting plate for mounting by using a bolt for mounting;
secondly, transporting the finished product of the precast unit of the hybrid beam to a construction site;
hoisting the precast unit of the hybrid beam, aligning a web plate of the steel pipe assembly with a bracket web plate of the column bracket, and connecting the connecting plate for installation with the web plate of the steel pipe assembly by screwing down the bolts for installation so as to accurately position the precast unit of the hybrid beam; then cutting off temporary fixing plates between the webs of the corbels at two sides and between the webs at two sides;
correspondingly welding the web plate of the steel pipe assembly and the web plate of the bracket by using a groove weld joint by using a connecting plate for installation as a base plate;
step five, extending a welding gun into the opening of the U-shaped section of the outward extending section of the steel pipe assembly, and correspondingly welding the lower flange plate of the bracket and the lower flange plate of the steel pipe assembly by adopting a groove welding seam;
welding two ends of the upper flange plate of the bracket with the upper flange plates of the assembled mixed column and the steel pipe assembly by groove welding seams respectively, welding the upper flange plate of the bracket with a bracket web and a web of the steel pipe assembly, and forming a rectangular steel pipe connecting cavity in the column bracket and the steel pipe assembly;
step seven, repeating the step three, the step four, the step five and the step six to complete the assembly and welding of all the mixed beam prefabricated units and the mixed column corbels;
step eight, injecting self-compacting concrete into the rectangular steel pipe cavity through the feeding guide pipe, and stopping injecting when the overflowing guide pipe overflows the concrete;
and step nine, cutting off the exposed feeding guide pipe and the flash guide pipe after the self-compacting concrete to be poured reaches the designed strength and the inspection is qualified, and completing the site construction process of the whole fabricated hybrid beam.
According to the theory of a steel-concrete combined structure, the combined structure can give full play to the mechanical properties of two materials through reasonable combination and collocation, and obtain more excellent structural properties; as the branched steel pipe concrete structure of the composite structure, the steel pipe and the concrete interact in the stress process, namely the steel pipe restrains the core concrete, so that the concrete is in a complex stress state, the strength of the concrete is improved, and the plasticity and the ductility are improved; meanwhile, due to the existence of the concrete, the early local yielding of the steel pipe can be delayed or avoided, so that the full play of the material performance of the steel pipe can be ensured, the two materials of the concrete-filled steel pipe mutually make up for the weakness of each other, and the advantages of each other are fully played, so that the concrete-filled steel pipe member has higher bearing capacity which is generally higher than the sum of the independent bearing capacities of the steel pipe and the core concrete which form the concrete-filled steel pipe. The steel pipe concrete structure theory is verified through a large number of structure tests and is widely applied to engineering practice.
The fabricated hybrid beam using the steel pipe concrete structure as the connection node according to the present invention may be defined as follows: the two ends are steel pipe concrete, and the steel pipe concrete is effectively connected with the middle reinforced concrete section. According to different stresses and materials, the hybrid beam can be divided into a steel pipe concrete connection section, a steel-concrete combined transition section, a reinforced concrete section and the like. The concrete-filled steel tube connecting section is formed by effectively combining a peripheral rectangular steel tube with internal concrete through shear resistant studs; the steel-concrete combined transition section (or called steel tube anchoring section) is formed by effectively combining the upper flange plate and the lower flange plate of the variable cross-section steel tube and a web plate with concrete through shear-resistant studs and stiffening ribs, and ensures the continuity and transition of stressed steel bars through batch welding of upper reinforcing steel bars and lower reinforcing steel bars of a beam and longitudinal construction reinforcing steel bars with the upper flange plate, the lower flange plate and the web plate; the reinforced concrete section does not contain steel ribs and has no difference with reinforced concrete.
Compared with the integral concrete composite beam assembled with the same section or the composite beam taking a pure steel structure as a connecting section, the composite beam has the advantages that the connecting section is of a steel pipe concrete structure, so that the effective section for bending resistance, shearing resistance and torsion resistance is not weakened, the effective section can be reinforced by adjusting the thickness of a flange plate and a web plate of a steel pipe, and the composite beam has better structural rigidity, bearing capacity and deformation resistance; in terms of structure, the upper flange plate of the connecting section is a cross-joint cover plate, and is staggered with the abutted joints of the lower flange plate and the web plate, the construction joint of the joint of new and old concrete and the butt-joint weld of the steel pipe are also staggered by the self-compacting concrete injected for the second time, namely, the whole steel plate is arranged outside the concrete construction joint, the whole cast concrete is arranged inside the butt-joint weld of the steel plate, the two staggered joints can both make up the construction defect, and the reliability of connection is enhanced; therefore, the connection performance of the hybrid beam can be higher than that of a cast-in-place reinforced concrete beam both theoretically and practically.
The other important advantage of the invention is embodied in the construction aspect of the fabricated hybrid beam, and the conventional construction technology and the conventional detection means are adopted from the processes of factory manufacturing of the hybrid beam prefabricated unit, field hoisting and splicing of the hybrid beam prefabricated unit, formation of the fabricated hybrid beam and the like, so that the construction quality of the fabricated hybrid beam is ensured.
Welding steel assemblies at two ends of a precast unit of the hybrid beam, welding double-sided or single-sided welding a steel bar and a steel pipe flange plate and a web plate, binding and spot welding a steel bar framework in the precast unit, supporting a mould and pouring concrete, wherein the steel bar framework has a mature construction technology and a detection means; the method is a construction method of a common box-type steel beam, and comprises the following steps of connecting a bracket web plate and a steel pipe assembly web plate of a hybrid beam prefabricated unit by adopting a connecting plate for installation and bolts for installation in site hoisting and splicing of the hybrid beam prefabricated unit, ensuring that the hybrid beam prefabricated unit is accurately in place, welding a bracket upper flange plate and a lower flange plate after the welding of the lower flange plate is completed, avoiding the welding of the lower flange plate in the upside down direction, and butt-jointing the bracket upper flange plate, the bracket lower flange plate, the web plate and the steel pipe assembly upper flange plate, the bracket lower flange plate and the web plate of the hybrid beam prefabricated unit by adopting groove welding; self-compacting concrete is poured in the cavity of the steel pipe, which is a common construction method for steel pipe concrete structures; therefore, the whole set of construction process of the assembled mixing column is mature, simple and even simple, the controllability is very strong, and the reliability is very high. Compared with the existing fabricated concrete structure technology, the method does not need to support, calibrate steel bars, sleeve grouting, slurry anchor lap joint, seam grouting and other complex connecting processes.
The prefabricated composite beam has the advantages that the construction period can be greatly shortened by adopting the fabricated composite beam, after the steel pipe assembly of the prefabricated composite beam unit is in butt welding with the column bracket, the prefabricated composite beam unit has certain structural rigidity and bearing capacity, the assembly and welding of the prefabricated composite beam unit can be completed from bottom to top, the self-compacting concrete in the steel pipe cavity is poured before the prefabricated floor slab is laid, and the guide pipe is cut off. Like the hybrid beam who uses pure steel construction as the linkage segment promptly, undertake the structure dead weight and the construction load during the installation, need not to wait that the self-compaction concrete in the steel pipe cavity reaches and just carries out subsequent construction after the design intensity.
The assembled hybrid beam has good economy and higher comprehensive cost performance. Compared with the existing assembled integral frame beam, the assembled hybrid beam has a part of steel pipe concrete combined connecting nodes, so that the steel consumption is increased. However, as known from the concrete-filled steel tube theory, the concrete-filled steel tube is the most economical in material by taking the condition of meeting the same performance target as a comparison condition; particularly, the assembled hybrid beam does not need to be supported, and does not need complex connection processes such as sleeve grouting, slurry anchor lapping, joint grouting and the like, so that a part of materials and construction cost can be saved, particularly, the construction period is shorter, the construction efficiency is higher, and a large amount of financial cost and labor cost can be saved; the price influence factors such as material consumption, labor consumption, construction period and the like are comprehensively considered, and the assembly type hybrid beam has higher cost performance than the existing assembly type integral frame beam.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
the invention takes the steel-concrete composite structure theory, especially the steel pipe concrete theory as guidance, develops a new way on the connection problem of the assembled concrete beam and the column, creatively introduces the steel pipe concrete structure as a connection node, and solves the technical problem of the existing assembled concrete beam.
The invention relates to a fabricated concrete beam with a steel pipe concrete connection node, which is applicable to the existing fabricated concrete structure, such as a fabricated frame structure, a fabricated frame-shear wall structure and the like; the method can also be used for super high-rise buildings such as an assembled concrete frame-core tube structure, an assembled tube-in-tube structure and the like.
The invention has the following innovation points and beneficial effects:
1. the steel pipe assembly 2 overhanging section of the prefabricated unit of the prefabricated mixed beam and the bracket of the mixed column are butt-welded to form a rectangular steel pipe, and self-compacting concrete is poured into the cavity of the rectangular steel pipe, so that the connecting section of the prefabricated mixed beam and the prefabricated mixed column is of a steel pipe concrete structure, and the prefabricated mixed beam has better structural rigidity, bearing capacity and deformation resistance, and can achieve the aim of being stronger than cast-in-place.
2. On the constructional measure of the inner extension section of the steel pipe assembly 2, the cross section of the inner extension section of the upper flange plate 2.1, the lower flange plate 2.2 and the web plate 2.3 is reduced, so that not only can the upper reinforcing steel bars 1.1 and 1.2, the lower reinforcing steel bars 1.3 and 1.4 and the longitudinal structural reinforcing steel bars 1.5 of the reinforced concrete beam be cut and welded in batches, but also the rigidity mutation degree of the inner extension section in transition to the reinforced concrete section is reduced, and in addition, the connection between the inner extension section of the steel pipe assembly 2 and the reinforced concrete is firm and smooth, and the whole performance of the assembled mixed beam is guaranteed.
3. The web 2.3 of the overhanging section of the steel pipe component 2 of the prefabricated unit of the assembled hybrid beam and the web 3.3 of the bracket of the hybrid column are installed in place through the connecting plate 5 for installation and the bolt 6 for installation, a supporting system is not needed, and the installation speed is high and the installation precision is high.
4. An opening with a U-shaped section is reserved through the yielding of the upper flange plate 2.1 of the steel pipe assembly 2, so that the lower flange plate 2.2 of the steel pipe assembly 2 and the lower flange plate 3.2 of the bracket can be conveniently welded, overhead welding is avoided, the construction difficulty is reduced, and the welding quality is ensured; the bracket upper flange plate 3.1 is used as a cover plate and spans the abutted seams of the web plate and the lower flange plate with the post-poured self-compacting concrete, and the construction reliability of the connecting part is enhanced.
5. Utilize the space in the extension section variable cross section chamfer region in the steel pipe assembly 2, place feeding pipe 9, flash pipe 10 to realize pouring of self-compaction concrete in convenient mode, on-the-spot nearly does not have "wet work", the operational environment is good.
6. Because most prefabricated units of the fabricated hybrid beam are made of common reinforced concrete materials and only two ends of the prefabricated units contain partial steel parts, the material consumption of the prefabricated hybrid beam is between that of the fabricated reinforced concrete composite beam and is close to that of the fabricated reinforced concrete composite beam.
7. Because the exposed surface of the steel part is less and is box-shaped, the anticorrosive and fireproof materials can be directly sprayed or smeared, and the coating engineering quantity is small.
In summary, the fabricated hybrid beam has the advantages of superior stress performance, economical materials, reliable and controllable quality, high efficiency and convenience in construction, and good operating environment, has higher comprehensive cost performance than the existing fabricated reinforced concrete composite beam, fabricated steel beam and pure steel connection hybrid beam, can greatly improve the assembly rate or prefabrication rate index of the structure when used in cooperation with a fabricated hybrid column or a fabricated hybrid column wall, and has great market popularization value.
Drawings
Fig. 1 is a schematic structural diagram of a precast unit of a hybrid beam.
Fig. 2 shows the connection of a hybrid beam to a hybrid column with corbels.
Fig. 3 isbase:Sub>A cross-sectionbase:Sub>A-base:Sub>A of fig. 1.
Fig. 4 is a section B-B of fig. 1.
Fig. 5 is a section C-C of fig. 1.
Fig. 6 is a cross-section D-D of fig. 1.
Fig. 7 is a section E-E of fig. 2.
Fig. 8 is a section F-F of fig. 2.
Fig. 9 is a G-G section of fig. 2.
Reference numerals are as follows:
1, prefabricating unit concrete, 1.1 upper corner bars, 1.2 upper middle steel bars, 1.3 lower corner bars, 1.4 lower middle steel bars, 1.5 longitudinal structural steel bars, 1.6 stirrups and 1.7 tie bars;
2, a steel pipe component, 2.1 upper flange plates, 2.2 lower flange plates, 2.3 webs, 2.4 stiffening ribs, 2.5 shear studs and 2.6 bolt holes;
3, assembling type mixing columns, 3.1 bracket upper flange plates, 3.2 bracket lower flange plates and 3.3 bracket web plates;
4 a temporary fixing plate, 5 a connecting plate for installation, 6 a bolt for installation, 7 a backing plate for welding, 8 groove welding seams, 9 a feeding pipe, 10 a flash pipe and 11 self-compacting concrete.
Detailed Description
The invention is further described with reference to the accompanying drawings and the detailed description.
The invention also relates to a connecting node of a steel pipe concrete structure, which adopts the fabricated hybrid beam, and connects the fabricated hybrid beam with the concrete column.
The fabricated hybrid beam comprises a hybrid beam prefabricated unit and a connecting structure between the hybrid beam prefabricated unit and the column.
The precast unit of hybrid beam is shown in figure 1, the interlude of precast unit of hybrid beam is the reinforced concrete roof beam, the cross-section of reinforced concrete roof beam is shown in figure 3, both ends set up steel pipe assembly 2 respectively about the precast unit of hybrid beam, steel pipe assembly 2 is connected to every end at reinforced concrete roof beam both ends, 2 parts of steel pipe assembly are buried underground as the interior section of stretching into for the reinforced concrete roof beam, another part stretches out in the reinforced concrete roof beam and connects as overhanging section through post bracket and steel core concrete column, the variable cross-section between the section of stretching out and the overhanging section of steel pipe assembly 2.
The reinforced concrete beam comprises precast unit concrete 1 poured along the beam direction, and an upper corner reinforcement 1.1, an upper middle reinforcement 1.2, a lower corner reinforcement 1.3, a lower middle reinforcement 1.4, a longitudinal construction reinforcement 1.5 and a stirrup 1.6 which are embedded in the precast unit concrete 1; as shown in fig. 5, two upper corners of the precast unit concrete 1 are respectively provided with an upper corner rib 1.1 along the beam direction, two upper middle steel bars 1.2 are arranged between the two upper corner ribs 1.1 of the two upper corners, and the upper corner rib 1.1 and the upper middle steel bar 1.2 are positioned on the same straight line; lower angle bars 1.3 along the beam direction are respectively arranged at two lower corners of the precast unit concrete 1, two lower middle steel bars 1.4 are arranged between the two lower angle bars 1.3 at the two upper corners, and the lower angle bars 1.3 and the lower middle steel bars 1.4 are positioned on the same straight line; set up vertical structure reinforcing bar 1.5 between per upper portion angle muscle 1.1 and the lower part angle muscle 1.3 with one side in prefabricated unit concrete 1 both sides, the upper portion angle muscle 1.1 and the lower part angle muscle 1.3 periphery in four corners set up stirrup 1.6, and upper portion angle muscle 1.1, upper portion intermediate reinforcement 1.2, lower part angle muscle 1.3, lower part intermediate reinforcement 1.4 and vertical structure reinforcing bar 1.5 all weld with stirrup 1.6.
In the precast unit concrete 1 without the steel pipe assembly 2, a tie bar 1.7 is arranged between the intersections of the stirrups 1.6 and the longitudinal construction steel bars 1.5 on both sides for connection. The lacing wires 1.7 can be arranged selectively, and the number can be selected. And at the intersection, welding a stirrup 1.6, a longitudinal structural steel bar 1.5 and a tie bar 1.7.
The steel pipe assembly 2 is formed by welding upper flange plates 2.1, lower flange plates 2.2 and webs 2.3 symmetrically arranged on two sides to form a rectangular enclosure, and is shown in figure 5; the inner sides of the upper flange plate 2.1, the lower flange plate 2.2 and the web plate 2.3 of the steel pipe assembly 2 are all welded with shear studs 2.5.
In the overhanging section of the steel pipe component 2, the lower flange plate 2.2 is respectively welded and fixed with the web plates 2.3 at two sides, and the upper flange plate 2.1 moves inwards relative to the lower flange plate 2.2 and the web plates 2.3, so that the overhanging section forms a U-shaped opening section, as shown in fig. 6; the inward-retreating displacement means that the upper flange plate 2.1 moves towards the direction close to the center of the reinforced concrete beam by a distance relative to the lower flange plate 2.2 and the web plate 2.3, so that the position of the upper flange plate and the position of the lower flange plate are dislocated with the lower flange plate 2.2 and the web plate 2.3.
In the interior section of stretching out of steel pipe assembly 2, the equal variable cross section of web 2.3 of upper flange board 2.1, lower flange board 2.2 and both sides, the steel sheet width is dwindled in the chamfer, and at the terminal tip of burying into reinforced concrete roof beam at upper flange board 2.1, lower flange board 2.2 and both sides the welding has stiffening rib 2.4 between adjacent both along circumference, see fig. 1, shown in fig. 4 for form variable cross section chamfer region outside stiffening rib 2.4 in the interior section four corners of stretching out of steel pipe assembly 2.
An upper angle rib 1.1 and an upper middle steel bar 1.2 of the reinforced concrete beam are welded with an upper flange plate 2.1 of the steel pipe assembly 2, and the upper middle steel bar 1.2 is welded with an upper flange plate 2.1 of the inward extending section, as shown in fig. 1 and 8; the lower corner rib 1.3 and the lower middle rib 1.4 of the reinforced concrete beam are welded with the lower flange plate 2.2 of the steel pipe assembly 2, and the lower middle rib 1.4 is welded with the lower flange plate 2.2 of the inward extending section, as shown in fig. 1 and 9; the longitudinal construction steel bar 1.5 of the reinforced concrete beam is welded with the web 2.3 of the steel pipe assembly 2.
The hoop 1.6 is arranged on the periphery of the inner extending section of the steel pipe component 2, and the hoop 1.6 is not arranged on the periphery of the outer extending section of the steel pipe component 2.
By utilizing the space of the variable cross-section chamfer area of the extension section in the steel pipe assembly 2, a feeding conduit 9 and a flash conduit 10 are respectively arranged in the variable cross-section chamfer area, as shown in fig. 1 and 5. Specifically, the overflow duct 10 is arranged at one corner of the upper side of the variable cross-section chamfer area, and the feeding duct 9 is arranged at one corner of the lower side of the variable cross-section chamfer area.
The connection structure chart of the precast unit and the column of the hybrid beam is shown in figure 2, which specifically comprises the following steps:
including setting up the post bracket, the post bracket mainly encloses through the welding with the rectangle by bracket web 3.3 of bracket upper limb listrium 3.1, bracket lower limb listrium 3.2 and bilateral symmetry arrangement and closes and form, the one end and the 3 welding of assembled hybrid column of post bracket, the other end respectively with the overhanging section welding of 2 of the steel pipe component of the prefabricated unit of hybrid beam. The bracket upper flange plate 3.1 is arranged near one end of the mixed beam prefabricated unit in an extending way towards the mixed beam prefabricated unit.
The inner sides of the upper bracket flange plate 3.1, the lower bracket flange plate 3.2 and the bracket web plate 3.3 are also welded with shear-resistant studs.
The bracket upper flange plate 3.1, the bracket lower flange plate 3.2 and the bracket webs 3.3 at two sides are respectively welded with the upper flange plate 2.1 and the lower flange plate 2.2 of the overhanging section of the steel pipe assembly 2 of the hybrid beam prefabricating unit and the webs 2.3 at two sides by groove welding seams 8, and self-compacting concrete 11 is poured into a cavity of the steel pipe assembly 2, which is formed by the bracket upper flange plate 3.1, the bracket lower flange plate 3.2 and the bracket webs 3.3 at two sides and is formed by the upper flange plate 2.1, the lower flange plate 2.2 and the webs 2.3 at two sides, as shown in fig. 2 and fig. 7.
The web 2.3 of the steel pipe assembly 2 and the bracket web 3.3 of the column bracket are fixedly connected through a connecting plate 5 for installation and a bolt.
The construction process comprises a factory manufacturing process of the hybrid beam prefabricated unit and a field assembling process of the assembled hybrid beam, wherein the hybrid beam prefabricated unit is prefabricated through the factory manufacturing process, and then the hybrid beam prefabricated unit is transported to the field to be subjected to the field assembling process.
The invention relates to a construction method of a fabricated hybrid beam taking a steel pipe concrete structure as a connecting node, which comprises the following specific steps:
1) Factory manufacturing procedures of the hybrid beam prefabricated unit:
the method comprises the following steps:
cutting and chamfering the plates of an upper flange plate 2.1, a lower flange plate 2.2 and a web plate 2.3 of the steel pipe assembly 2, welding shear-resistant studs 2.5 on the plates, and manufacturing bolt holes for connecting a connecting plate 5 for installation on the web plate 2.3;
prefabricating and processing the stiffening ribs 2.4, temporarily fixing the plates 4, mounting connecting plates 5, welding backing plates 7, feeding pipes 9 and flash pipes 10, and placing in a classified manner.
Welding the upper flange plate 2.1 and the lower flange plate 2.2 serving as main materials to the web 2.3, enclosing the upper flange plate 2.1 in an inward-moving manner to form a rectangular steel pipe, welding upper stiffening ribs 2.4 at the end parts of the upper flange plate 2.1, the lower flange plate 2.2 and the web 2.3 positioned at the inward-extending section of the steel pipe assembly 2, and welding a temporary fixing plate 4 between the tops of the webs 2.3 positioned at the two sides of the outward-extending section of the steel pipe assembly 2;
binding and manufacturing a reinforcement cage consisting of an upper corner reinforcement 1.1, an upper middle reinforcement 1.2, a lower corner reinforcement 1.3, a lower middle reinforcement 1.4, a longitudinal structural reinforcement 1.5 and a stirrup 1.6, welding the upper corner reinforcement 1.1, the upper middle reinforcement 1.2 and an upper flange plate 2.1, welding the lower corner reinforcement 1.3, the lower middle reinforcement 1.4 and a lower flange plate 2.2, welding the longitudinal structural reinforcement 1.5 and a web plate 2.3, and arranging the stirrup 1.6 along the whole length of the hybrid beam prefabricated unit;
step four, putting the feeding conduit 9 and the flash conduit 10 into a variable cross-section chamfer area, and sealing the pipe orifice with a cover;
supporting steel templates for pouring concrete of the mixed beam prefabricated unit, wherein the supporting steel templates are embedded into steel pipes at the left end and the right end of the prefabricated unit;
step six, pouring concrete into the cavities of the column bracket and the steel pipe assembly 2 to form prefabricated unit concrete 1, and vibrating the prefabricated unit concrete tightly;
step seven, demolding after molding and curing to form a hybrid beam prefabricated unit;
and step eight, spot welding the backing plates 7 on the bottom surfaces of the end parts of the upper flange plate 2.1 and the lower flange plate 2.2 at the overhanging section of the steel pipe assembly 2 of the hybrid beam precast unit to complete the factory manufacturing process of the hybrid beam precast unit.
2) The field assembly process of the fabricated hybrid beam comprises the following steps:
firstly, mounting of an assembled mixing column 3 and a column bracket thereof is completed in advance, a bracket lower flange plate 3.2 and a bracket web plate 3.3 in the column bracket are welded with the assembled mixing column 3, a bracket upper flange plate 3.1 is not welded temporarily, a temporary fixing plate 4 is welded and fixed on the upper parts of the bracket web plates 3.3 at two sides, and the bracket web plate 3.3 is connected with one side of a connecting plate 5 for mounting by adopting a bolt 6 for mounting;
secondly, transporting the finished product of the precast unit of the hybrid beam to a construction site, classifying and numbering, and waiting for installation;
thirdly, hoisting the precast unit of the hybrid beam, aligning a web plate 2.3 of the steel pipe assembly 2 with a bracket web plate 3.3 of the column bracket, and connecting a connecting plate 5 for installation with the web plate 2.3 of the steel pipe assembly 2 by screwing down a bolt 6 for installation so as to accurately position the precast unit of the hybrid beam; a temporary fixing plate 4 between the bracket webs 3.3 at two sides and between the webs 2.3 at two sides are cut off;
correspondingly welding the web 2.3 of the steel pipe assembly 2 and the web 3.3 of the bracket by using the connecting plate 5 for installation as a backing plate through a groove weld 8;
step five, a welding gun is extended into the opening of the U-shaped section of the outward extending section of the steel pipe assembly 2, and the bracket lower flange plate 3.2 and the lower flange plate 2.2 of the steel pipe assembly 2 are correspondingly welded by a groove welding seam 8;
welding two ends of an upper flange plate 3.1 of the bracket with the assembled mixed column 3 and an upper flange plate 2.1 of the steel pipe component 2 respectively by adopting a groove weld 8, welding the upper flange plate 3.1 of the bracket with a bracket web 3.3 and a web 2.3 of the steel pipe component 2, and forming a rectangular steel pipe connecting cavity in the column bracket and the steel pipe component 2;
step seven, repeating the step three, the step four, the step five and the step six to complete the assembling and welding of the mixed beam prefabricated unit and the mixed column bracket;
step eight, injecting self-compacting concrete 11 into the rectangular steel pipe cavity through the feeding guide pipe 9, and stopping injecting when the flash guide pipe 10 overflows the concrete;
step nine, after the self-compacting concrete 11 to be poured reaches the design strength and is qualified through inspection, the exposed feeding guide pipe 9 and the flash guide pipe 10 are cut off, and the site construction process of the fabricated mixed beam is completed.
The fabricated mixed beam has the advantages of excellent stress performance, economic materials, reliable and controllable quality, high efficiency, convenience and good operating environment, has higher comprehensive cost performance than the existing fabricated reinforced concrete superposed beam, fabricated steel beam and pure steel connection mixed beam, can greatly improve the assembly rate or prefabrication rate index of the structure when being matched with a fabricated mixed column or a fabricated mixed column wall, and has higher market popularization value.
Claims (10)
1. The utility model provides an use assembled hybrid beam of steel pipe concrete structure as connected node which characterized in that:
the fabricated hybrid beam comprises a hybrid beam prefabricated unit and a connecting structure between the hybrid beam prefabricated unit and the fabricated hybrid column; the interlude of precast unit of hybrid beam is reinforced concrete beam, and both ends set up steel pipe component (2) respectively about precast unit of hybrid beam, and steel pipe component (2) partly bury in reinforced concrete beam as the internal extension section, and another part stretches out and connects as overhanging section through post bracket and assembled hybrid column in reinforced concrete beam.
2. The prefabricated hybrid beam with the steel pipe concrete structure as the connection node as claimed in claim 1, wherein:
the reinforced concrete beam comprises precast unit concrete (1) poured along the beam direction, and an upper corner bar (1.1), an upper middle bar (1.2), a lower corner bar (1.3), a lower middle bar (1.4), a longitudinal construction bar (1.5) and a stirrup (1.6) which are embedded in the precast unit concrete (1); upper angle ribs (1.1) are respectively arranged at two upper corners of the precast unit concrete (1), and an upper middle steel bar (1.2) is arranged between the two upper angle ribs (1.1) at the two upper corners; lower angle ribs (1.3) are respectively arranged at two lower corners of the precast unit concrete (1), and a lower middle steel bar (1.4) is arranged between the two lower angle ribs (1.3) at the two upper corners; longitudinal structural steel bars (1.5) are arranged between upper corner ribs (1.1) and lower corner ribs (1.3) on each same side of two sides of the precast unit concrete (1), and stirrups (1.6) are arranged on the peripheries of the upper corner ribs (1.1) and the lower corner ribs (1.3) at four corners; in the precast unit concrete (1) without the steel pipe assembly (2), a tie bar (1.7) is arranged between the intersections of the stirrups (1.6) on two sides and the longitudinal construction steel bars (1.5) for connection.
3. A fabricated hybrid beam using a steel pipe concrete structure as a connection node according to claim 1 or 2, wherein:
the steel pipe assembly (2) is formed by welding and enclosing an upper flange plate (2.1), a lower flange plate (2.2) and webs (2.3) symmetrically arranged on two sides in a rectangular shape; the inner sides of an upper flange plate (2.1), a lower flange plate (2.2) and a web plate (2.3) of the steel pipe assembly (2) are welded with shear-resistant studs (2.5); in the outward extending section of the steel pipe assembly (2), the lower flange plate (2.2) is respectively welded and fixed with the webs (2.3) at two sides, and the upper flange plate (2.1) moves back and moves relative to the lower flange plate (2.2) and the webs (2.3) so that the outward extending section forms a U-shaped opening section; in the interior section of stretching out of steel pipe subassembly (2), steel sheet width is reduced in web (2.3) of upper flange board (2.1), lower flange board (2.2) and both sides, and the welding of terminal tip at embedding reinforced concrete roof beam at upper flange board (2.1), lower flange board (2.2) and web (2.3) of both sides has stiffening rib (2.4) between the adjacent both along circumference for form variable cross section chamfer region outside stiffening rib (2.4) at the interior section four corners of stretching out of steel pipe subassembly (2).
4. The prefabricated hybrid beam with the steel pipe concrete structure as the connection node as claimed in claim 3, wherein: the upper corner bar (1.1) and the upper middle steel bar (1.2) of the reinforced concrete beam are welded with the upper flange plate (2.1) of the steel pipe assembly (2); the lower corner rib (1.3) and the lower middle steel bar (1.4) of the reinforced concrete beam are welded with the lower flange plate (2.2) of the steel pipe assembly (2); longitudinal construction steel bars (1.5) of the reinforced concrete beam are welded with a web plate (2.3) of the steel pipe assembly (2).
5. The prefabricated hybrid beam with the steel pipe concrete structure as the connection node as claimed in claim 1, wherein: the variable cross-section chamfer area is respectively provided with a feeding conduit (9) and a flash conduit (10).
6. The prefabricated hybrid beam with the steel pipe concrete structure as the connection node as claimed in claim 1, wherein: the connection structure of the precast unit of the mixed beam and the column specifically comprises: including setting up the post bracket, the post bracket mainly by the bracket upper limb listrium (3.1), bracket lower limb listrium (3.2) and bilateral symmetry arrange's bracket web (3.3) enclose with the rectangle through the welding and close and form, the one end and the assembled hybrid column (3) welding of post bracket, the other end respectively with the overhanging section welding of steel pipe component (2) of hybrid beam prefabricated unit.
7. The prefabricated hybrid beam with the steel pipe concrete structure as the connection node as claimed in claim 1, wherein: bracket web (3.3) of bracket upper limb listrium (3.1), bracket lower limb listrium (3.2) and both sides adopt groove weld (8) to correspond the welding with upper limb listrium (2.1), lower limb listrium (2.2) of the overhanging section of steel pipe assembly (2) of hybrid beam prefabricated unit and web (2.3) of both sides respectively, pour into in the cavity of post bracket and steel pipe assembly (2) self-compaction concrete (11).
8. The construction method applied to the fabricated hybrid beam as set forth in any one of claims 1 to 7, wherein:
the method comprises a factory manufacturing process of the mixed beam prefabricated unit and a field assembling process of the assembled mixed beam, wherein the mixed beam prefabricated unit is prefabricated through the factory manufacturing process, and then the mixed beam prefabricated unit is transported to the field to be subjected to the field assembling process.
9. The construction method of the fabricated hybrid beam as set forth in claim 8, wherein:
the factory manufacturing process of the hybrid beam prefabricated unit comprises the following steps:
the method comprises the following steps:
cutting and chamfering the plates of an upper flange plate (2.1), a lower flange plate (2.2) and a web plate (2.3) of the steel pipe assembly (2), welding shear studs (2.5), and manufacturing bolt holes for connecting and installing connecting plates (5) on the web plate (2.3);
welding the upper flange plate (2.1) and the lower flange plate (2.2) serving as main materials to a web plate (2.3), enclosing the upper flange plate (2.1) in an inward-retreating and shifting manner to form a rectangular steel pipe, welding upper stiffening ribs (2.4) at the end parts of the upper flange plate (2.1), the lower flange plate (2.2) and the web plate (2.3) of an inward extending section of the steel pipe assembly (2), and welding a temporary fixing plate (4) between the tops of the web plates (2.3) on two sides of an outward extending section of the steel pipe assembly (2);
binding and manufacturing a reinforcement cage consisting of an upper corner reinforcement (1.1), an upper middle reinforcement (1.2), a lower corner reinforcement (1.3), a lower middle reinforcement (1.4), a longitudinal structural reinforcement (1.5) and a stirrup (1.6), welding the upper corner reinforcement (1.1), the upper middle reinforcement (1.2) and an upper flange plate (2.1), welding the lower corner reinforcement (1.3), the lower middle reinforcement (1.4) and a lower flange plate (2.2), welding the longitudinal structural reinforcement (1.5) and a web plate (2.3), and arranging the stirrup (1.6) in full length;
putting a feeding guide pipe (9) and a flash guide pipe (10) into the variable cross-section chamfer area, and sealing the pipe orifice;
supporting steel templates for pouring concrete of the mixed beam prefabricated unit, wherein the supporting steel templates are embedded into steel pipes at the left end and the right end of the prefabricated unit;
pouring concrete in the cavities of the column corbels and the steel pipe assemblies (2) to form prefabricated unit concrete (1), and vibrating to be compact;
step seven, demolding after molding and curing to form a hybrid beam prefabricated unit;
and step eight, welding the backing plates (7) for welding at the end parts of the upper flange plate (2.1) and the lower flange plate (2.2) at the overhanging section of the steel pipe assembly (2) of the hybrid beam precast unit by spot welding to complete the factory manufacturing process of the hybrid beam precast unit.
10. The construction method of the fabricated hybrid beam as set forth in claim 8, wherein:
the field assembly process of the fabricated hybrid beam comprises the following steps:
firstly, mounting of an assembly type mixing column (3) and a column bracket of the assembly type mixing column, welding a bracket lower flange plate (3.2) and a bracket web plate (3.3) in the column bracket with the assembly type mixing column (3), temporarily not welding an upper flange plate (3.1) of the bracket, welding and fixing a temporary fixing plate (4) on the upper parts of the bracket web plates (3.3) at two sides, and connecting the bracket web plates (3.3) with one side of a connecting plate (5) for mounting by bolts (6) for mounting;
secondly, transporting the finished product of the precast unit of the mixed beam to a construction site;
thirdly, hoisting the precast unit of the hybrid beam, aligning a web plate (2.3) of the steel pipe assembly (2) with a bracket web plate (3.3) of the column bracket, and connecting a connecting plate (5) for installation with the web plate (2.3) of the steel pipe assembly (2) by screwing down bolts (6) for installation to accurately position the precast unit of the hybrid beam; then cutting off temporary fixing plates (4) between the corbel web plates (3.3) at two sides and between the web plates (2.3) at two sides;
correspondingly welding the web (2.3) of the steel pipe assembly (2) and the web (3.3) of the bracket by using the connecting plate (5) for installation as a backing plate through a groove welding seam (8);
step five, extending a welding gun into the opening of the U-shaped section of the outward extending section of the steel pipe assembly (2), and correspondingly welding the bracket lower flange plate (3.2) and the lower flange plate (2.2) of the steel pipe assembly (2) by adopting a groove welding seam (8);
welding two ends of the bracket upper flange plate (3.1) with the assembled mixed column (3) and the upper flange plate (2.1) of the steel pipe assembly (2) by groove welding seams (8), welding the bracket upper flange plate (3.1) with a bracket web plate (3.3) and the web plate (2.3) of the steel pipe assembly (2), and forming a rectangular steel pipe connecting cavity in the column bracket and the steel pipe assembly (2);
step seven, repeating the step three, the step four, the step five and the step six to complete the assembly and welding of all the mixed beam prefabricated units and the mixed column corbels;
step eight, injecting self-compacting concrete (11) into the rectangular steel pipe cavity through the feeding guide pipe (9), and stopping injecting when the concrete overflows from the flash guide pipe (10);
and step nine, after the self-compacting concrete (11) to be poured reaches the design strength and is qualified through inspection, cutting off the exposed feeding guide pipe (9) and the flash guide pipe (10), and completing the site construction process of the whole fabricated hybrid beam.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000144906A (en) * | 1998-09-07 | 2000-05-26 | Sumitomo Metal Ind Ltd | Column/beam joint section between cft structural column and src structural beam and beam main bar fixing metal fixture |
| CN101113604A (en) * | 2007-06-22 | 2008-01-30 | 东南大学 | Full-prefabricated assembled concrete frame construction |
| CN205804624U (en) * | 2016-07-05 | 2016-12-14 | 重庆大学 | A kind of box joint for connecting precast concrete beam |
| CN106481023A (en) * | 2016-10-27 | 2017-03-08 | 绍兴文理学院 | Assembled steel reinforced concrete bondbeam structure and its implementation |
| CN109024222A (en) * | 2018-08-14 | 2018-12-18 | 湖南金海集团有限公司 | A kind of steel construction box beam connecting node assembly device and its assembling method |
| CN112900619A (en) * | 2021-01-27 | 2021-06-04 | 海南大学 | Fabricated concrete beam-column joint and construction method thereof |
| CN114370126A (en) * | 2022-01-27 | 2022-04-19 | 浙江大学建筑设计研究院有限公司 | Prefabricated unit of assembled hybrid column extension and connected node |
| CN218643534U (en) * | 2022-08-03 | 2023-03-17 | 浙江大学建筑设计研究院有限公司 | Assembly type hybrid beam with steel pipe concrete structure as connecting node |
-
2022
- 2022-08-03 CN CN202210926818.0A patent/CN115341714A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000144906A (en) * | 1998-09-07 | 2000-05-26 | Sumitomo Metal Ind Ltd | Column/beam joint section between cft structural column and src structural beam and beam main bar fixing metal fixture |
| CN101113604A (en) * | 2007-06-22 | 2008-01-30 | 东南大学 | Full-prefabricated assembled concrete frame construction |
| CN205804624U (en) * | 2016-07-05 | 2016-12-14 | 重庆大学 | A kind of box joint for connecting precast concrete beam |
| CN106481023A (en) * | 2016-10-27 | 2017-03-08 | 绍兴文理学院 | Assembled steel reinforced concrete bondbeam structure and its implementation |
| CN109024222A (en) * | 2018-08-14 | 2018-12-18 | 湖南金海集团有限公司 | A kind of steel construction box beam connecting node assembly device and its assembling method |
| CN112900619A (en) * | 2021-01-27 | 2021-06-04 | 海南大学 | Fabricated concrete beam-column joint and construction method thereof |
| CN114370126A (en) * | 2022-01-27 | 2022-04-19 | 浙江大学建筑设计研究院有限公司 | Prefabricated unit of assembled hybrid column extension and connected node |
| CN218643534U (en) * | 2022-08-03 | 2023-03-17 | 浙江大学建筑设计研究院有限公司 | Assembly type hybrid beam with steel pipe concrete structure as connecting node |
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