CN214575128U - Prestressed part outsourcing steel T shape combination beam - Google Patents

Prestressed part outsourcing steel T shape combination beam Download PDF

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CN214575128U
CN214575128U CN202120478605.7U CN202120478605U CN214575128U CN 214575128 U CN214575128 U CN 214575128U CN 202120478605 U CN202120478605 U CN 202120478605U CN 214575128 U CN214575128 U CN 214575128U
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steel
honeycomb
prestressed
cast
concrete
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杨勇
刘彬
于云龙
冯世强
张树琛
徐龙康
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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Abstract

A prestressed part steel-clad T-shaped composite beam is mainly composed of a prestressed prefabricated rectangular composite beam and a cast-in-place concrete flange plate based on a prestressed prefabricated assembly technology. The prestressed prefabricated rectangular composite beam comprises honeycomb-shaped steel; the lacing wire is arranged in the hole of the honeycomb section steel and is vertical to the web plate of the section steel; the closed stirrups are arranged between the flanges of the honeycomb section steel; the beam inner longitudinal rib I is arranged at the inner bottom of the closed stirrup ring and is parallel to the beam length direction; the beam inner longitudinal rib II is arranged at the top in the closed stirrup ring and is parallel to the beam length direction; the prestressed steel strands are arranged on the upper part of the lower flange of the honeycomb steel and are parallel to the length direction of the beam; prefabricated UHPC (ultra high performance concrete) filled between the flanges of the honeycomb section steel; and the stud is arranged at the top of the upper flange of the honeycomb steel. The cast-in-place concrete flange plate comprises double-layer bidirectional reinforcing steel bars arranged in the cast-in-place flange plate; and the cast-in-place concrete is filled at the top of the prestressed prefabricated rectangular composite beam. The utility model discloses the atress performance is good, can obviously improve the anti crack resistance and the bending rigidity of roof beam, and the site operation is convenient, shortens construction cycle.

Description

Prestressed part outsourcing steel T shape combination beam
Technical Field
The utility model belongs to the technical field of the building, in particular to prestressing force part outsourcing steel T shape combination roof beam.
Background
Along with the rapid development of economy, high-rise, super high-rise and large-span spatial structure constantly increases, and the load that the component bore increases at double, in order to satisfy the requirement of major structure bearing, needs to increase the cross-sectional dimension of component and satisfies the needs, and this has just increased major structure's dead weight, influences spatial layout and pleasing to the eye degree and has reduced anti-seismic performance, is unfavorable for the development of green building.
The problems of low cracking and insufficient rigidity of the beam in a large-span structure can be effectively solved by applying prestress to the steel reinforced concrete composite beam, but the traditional prestress technology needs on-site tensioning prestress, the construction process is complex, and the requirements of industrialized and intelligent construction are difficult to adapt.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a prestressing force part outsourcing steel T-shaped combination beam and construction method thereof, based on the prestressing force prefabrication assembly technology, the complex problem of the field construction of the traditional prestressing force structure is solved, and the prestressing force part outsourcing steel T-shaped combination beam has the advantages of high bearing capacity, good anti-cracking performance, large rigidity, small member section size, small dead weight and the like.
In order to realize the purpose, the utility model discloses a technical scheme is:
the utility model provides a prestressing force part outsourcing steel T shape combination beam, includes prestressing force prefabricated rectangle combination beam 1 and cast in situ concrete flange board 2 two parts, its characterized in that:
the prestressed prefabricated rectangular composite girder 1 includes:
honeycomb section steel 101;
the lacing wire 103 is arranged in the hole of the honeycomb steel 101 and is vertical to the web plate of the honeycomb steel 101;
the closed stirrups 102 are arranged between the flanges of the honeycomb steel 101 and symmetrically distributed on two sides of the web, and the plane where the closed stirrups 102 are located is perpendicular to the web;
the first longitudinal ribs 105 are arranged on the upper portion of the lower flange of the honeycomb section steel 101 and are parallel to the length direction of the honeycomb section steel 101;
a plurality of second longitudinal ribs 107 which are arranged at the lower part of the upper flange of the honeycomb-shaped steel 101 and are parallel to the length direction of the honeycomb-shaped steel 101;
the prestressed steel strands 104 are arranged on the upper portion of the lower flange of the honeycomb section steel 101 and are parallel to the length direction of the honeycomb section steel 101;
prefabricated Ultra High Performance Concrete (UHPC)106 filled between the upper flange and the lower flange of the honeycomb steel 101;
and the number of the first and second groups,
a plurality of pegs 108 which are arranged at the top of the upper flange of the honeycomb steel 101 and are at equal intervals;
the cast-in-place concrete flange plate 2 includes:
the double-layer bidirectional steel bar 201 is arranged in the cast-in-place flange plate;
the cast-in-place concrete 202 is filled at the top of the prestressed prefabricated rectangular composite beam 1, and the cast-in-place concrete 202 pours and coats the double-layer bidirectional steel bar 201 therein.
The honeycomb-shaped steel 101 is formed by uniformly perforating high-strength I-shaped steel on a web plate or cutting and welding high-strength steel plates.
The contact position of the tie bar 103 and the hole of the honeycomb steel 101 is welded, the tie bar is bound and fixed with the closed stirrups 102 on two sides, and a steel bar with the diameter larger than or equal to that of the closed stirrups 102 is adopted; the closed stirrups 102 are located in holes of the honeycomb steel 101, the first longitudinal reinforcements 105 are bound with the inner lower portions of the two side closed stirrups 102, the second longitudinal reinforcements 107 are bound with the inner upper portions of the two side closed stirrups 102, and the prefabricated ultrahigh-performance concrete 106 is integrally formed on two sides of a web plate of the honeycomb steel 101 through one-step pouring and does not exceed the honeycomb steel 101 in the length direction.
The prestressed steel strands 104 penetrate through the inside of the pre-buried corrugated pipe, the corrugated pipe is fixed to the lower side of the tie bar 103, the arrangement form of the prestressed steel strands 104 is linear or parabolic according to specific engineering conditions, and the prestressed steel strands 104 are tensioned to a design value by a post-tensioning method.
The stud 108 is connected with the honeycomb steel 101 through welding and is arranged according to design requirements.
The double-layer bidirectional steel bars 201 in the cast-in-place flange plate are arranged at equal intervals in the longitudinal direction and the transverse direction.
The cast-in-place concrete 202 is made of ordinary concrete.
The utility model also provides a construction method of prestressing force part outsourcing steel T shape combination roof beam, the step is as follows:
1. in a factory, firstly, a first longitudinal bar 105 is arranged at the bottom of a closed hoop 102, a second longitudinal bar 107 is arranged at the top of the closed hoop 102, and all the longitudinal bars are bound and fixed by binding wires to form a reinforcement cage, the reinforcement cage consisting of the first longitudinal bar 104, the second longitudinal bar 107 and the closed hoop 102 is arranged at a preset position in flanges at two sides of a web plate of the honeycomb steel 101, a tie bar 103 vertically penetrates through a hole of the web plate of the honeycomb steel 101, the tie bar 103 is fixed with the closed hoop 102 after being in spot welding at a contact position of the tie bar 103 and the hole of the honeycomb steel 101, a prestressed steel strand penetrates through a corrugated pipe and is arranged at the lower side of the tie bar 103 and bound and fixed with the tie bar 103, after the completion, a prefabricated UHPC106 is poured, the prestressed steel strand is tensioned according to the design requirement after the strength of concrete reaches over 75%, and finally a bolt 108 is welded;
2. in the field, two ends of the honeycomb steel 101 are connected with a combined column or a steel column;
3. erecting a template, arranging double-layer bidirectional steel bars 201 in the cast-in-place flange plate, and pouring a cast-in-place flange plate 202.
Compared with the prior art, the beneficial effects of the utility model are that:
1) simple construction, green and environmental protection
The prestressed prefabricated rectangular composite beam part in the novel prestressed part externally-coated steel T-shaped composite beam is characterized in that longitudinal reinforcements, stirrups, tie reinforcements and prestressed steel strands are placed at preset positions, an externally-coated UHPC is poured, and after the strength of concrete reaches a certain level, the construction can be completed by stretching and drawing prestress in a factory. Compared with the traditional composite beam, the construction method avoids the tensioning prestress of the construction site, lightens the workload of casting concrete on site, simplifies the construction process, can greatly improve the construction efficiency, and meets the requirements of energy conservation and emission reduction of green buildings.
2) High integrity and low cost
The novel prestressed part steel-wrapped T-shaped composite beam has the advantages that the concrete of the prestressed prefabricated rectangular composite beam part can be poured at one time, the web plate is provided with the natural shear connector, so that the concrete on two sides of the web plate is connected into a whole, the bonding property of the section steel and the concrete can be enhanced, the section steel and the concrete can work together integrally, and the cost for additionally welding the shear-resistant stud is reduced. The precast part and the cast-in-place part can adopt concrete with different strength grades, the web part uses UHPC and applies prestress, the cracking load and the rigidity of the beam can be improved, the flange plate uses recycled concrete, light aggregate concrete, sound insulation concrete and the like, and the manufacturing cost is reduced while various performances of the beam are ensured by using different concretes.
3) Excellent performance and flexible design
The novel prestressed part steel-clad T-shaped composite beam applies the prefabricated prestressing technology to a high-strength honeycomb steel and ultra-high performance concrete UHPC composite beam, effectively improves the stress performance of the beam, improves the beam rigidity, reduces the cross section area, reduces the self weight of the structure and is beneficial to earthquake resistance.
Generally, the novel prestressed part externally-wrapped steel T-shaped combination beam can not only exert the advantages of a combination structure, but also meet the requirements of building aesthetics and functions, and simultaneously simplify the construction steps and accelerate the construction progress. Can be widely applied to various building structures, and adds tiles for promoting the development of the building industry.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is the side view of the honeycomb steel, longitudinal bar, linear prestressed steel strand, stirrup, and lacing wire.
Fig. 3 is a three-dimensional schematic view of the linear prestressed partially-externally-wrapped steel T-shaped composite beam of the present invention.
Fig. 4 is a perspective view of the parabolic prestressed partially-clad steel T-shaped composite beam of the present invention.
Fig. 5 is the utility model discloses prefabricated part and post connection pour pterygoid lamina combination stereogram.
FIG. 6 is a detailed view of section A-A in FIG. 5, which is a schematic cross-sectional view of the section where the section steel is not opened.
FIG. 7 is a detailed view of section B-B in FIG. 5, which is a schematic cross-sectional view of the open hole of the section steel.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings and examples.
A prestressed part steel-clad T-shaped combination beam is based on a prestressed prefabrication and assembly technology, is excellent in stress performance, can obviously improve the crack resistance and the bending rigidity of the beam, is convenient to construct on site, and shortens the construction period. As shown in fig. 1, it is mainly composed of a prestressed prefabricated rectangular composite girder 1 and a cast-in-place concrete flange plate 2.
Referring to fig. 2, 3 and 4, the prestressed prefabricated rectangular composite girder 1 includes: the prefabricated concrete comprises honeycomb steel 101, a plurality of closed stirrups 102, a plurality of tie bars 103, a plurality of longitudinal bars 105, a plurality of longitudinal bars 107, a plurality of prestressed steel strands 104, prefabricated ultrahigh-performance concrete 106 and a plurality of studs 108; the cast-in-place concrete flange plate 2 mainly comprises double layers of bidirectional steel bars 201 and cast-in-place concrete 202.
Specifically, the honeycomb structural steel 101 is formed by uniformly perforating a web plate of high-strength i-steel or cutting and welding high-strength steel plates.
The closed stirrups 102 are arranged between the flanges of the honeycomb steel 101 and symmetrically distributed on two sides of the web, and can be correspondingly distributed in the holes of the honeycomb steel 101, and the plane where the closed stirrups 102 are located is perpendicular to the web.
Lacing wire 103 sets up in honeycomb shaped steel 101 hole and is mutually perpendicular with honeycomb shaped steel 101 web, welds with honeycomb shaped steel 101 hole contact position department, and it is fixed to carry out the ligature with both sides closed stirrup 102, and adopts the reinforcing bar that the diameter is greater than or equal to closed stirrup 102 diameter.
The prestressed steel strands 104 are arranged on the upper portion of the lower flange of the honeycomb steel 101 and are parallel to the length direction of the honeycomb steel 101, penetrate through the pre-buried corrugated pipe, the corrugated pipe is fixed to the lower side of the tie bar 103, the arrangement form of the prestressed steel strands 104 is linear or parabolic according to specific engineering conditions, and the prestressed steel strands 104 are tensioned to a design value by a post-tensioning method.
The first longitudinal rib 105 is arranged on the upper portion of the lower flange of the honeycomb section steel 101 and is parallel to the length direction of the honeycomb section steel 101, and the first longitudinal rib 105 and the inner lower portion of the closed stirrup 102 on the two sides are bound.
The second longitudinal rib 107 is arranged on the lower portion of the upper flange of the honeycomb steel 101 and is parallel to the length direction of the honeycomb steel 101, and the second longitudinal rib 107 is bound with the inner upper portion of the closed stirrups 102 on the two sides.
The pegs 108 are arranged on the top of the upper flange of the honeycomb-shaped steel 101 at equal intervals, are connected with the honeycomb-shaped steel 101 through welding, and are arranged according to design requirements.
The prefabricated ultrahigh-performance concrete 106 is filled between the upper flange and the lower flange of the honeycomb section steel 101, and is integrally formed on two sides of a web plate of the honeycomb section steel 101 through one-step pouring, and the length direction of the prefabricated ultrahigh-performance concrete does not exceed that of the honeycomb section steel 101.
The double-layer bidirectional steel bar 201 is arranged in the cast-in-place flange plate and is arranged at equal intervals in the longitudinal direction and the transverse direction
The cast-in-place concrete 202 is ordinary concrete and is filled at the top of the prestressed prefabricated rectangular composite beam 1, and the double-layer bidirectional reinforcing steel bars 201 are poured and coated in the concrete.
As shown in fig. 4, 5, 6 and 7, the honeycomb steel 101, the prefabricated ultrahigh-performance concrete 106, the first longitudinal bar 105, the prestressed steel strand 104, the closed hoop bar 102, the tie bar 103, the second longitudinal bar 107 and the stud 108 are all prefabricated parts. Double-layer bidirectional steel bars 201 in the flange plate and flange plate concrete 202 belong to a cast-in-place part, and the cast-in-place stud 108 is located in the cast-in-place part.
Wherein:
1) the prefabricated rectangular composite beam part adopts UHPC and a prefabricated prestress technology, so that the crack resistance and the bending rigidity of the composite beam are improved, and the flange plate part adopts concrete with low strength grade, and can adopt recycled concrete, light aggregate concrete, sound insulation concrete and the like.
2) The prefabricated UHPC does not exceed the honeycomb-shaped steel in the length direction, namely a small section of the section of.
3) The arrangement form of the prestressed steel strand wire is a linear form or a parabolic form. The prestress tension stage is completed in a factory prefabrication stage, so that the field construction process is reduced, and the obvious economic benefit is achieved.
4) The honeycomb-shaped steel can be round, oval or rectangular in hole opening form, and the hole opening form and the hole opening position are reasonably designed and properly arranged according to the bearing capacity requirement and the actual engineering condition. The honeycomb holes effectively connect the precast concrete and the section steel, and ensure good cooperative working performance of the precast concrete and the section steel.
The utility model discloses construction method step is as follows:
firstly, a prestressed prefabricated rectangular composite beam is manufactured in a factory, then the beam is transported to a construction site for installation, and finally, a cast-in-place concrete part on the upper part of the composite beam is integrally cast with a concrete floor slab. All prestressed steel strands, all stirrups and all tie bars are wrapped by the prefabricated UHPC in the majority of honeycomb steel web plates and longitudinal bars in the prefabricated rectangular composite beam; if the upper flange plate does not adopt a concrete cast-in-place mode, the modes of profiled steel sheet composite plates, laminated plates and the like can be adopted, and special measures need to be taken for connecting the lower web plate and the upper flange plate when the modes are adopted so as to ensure reliable connection performance and good common working performance. The combination of the lower web plate and the upper wing plate in different forms can be optimally combined into a combination beam in various forms so as to adapt to the requirements of different engineering constructions.
The utility model adopts the honeycomb steel section form on the basis of the traditional steel reinforced concrete composite beam, uses the lacing wire to tie the closed stirrups at the two sides, solves the stirrup connection problem of the traditional part externally-wrapped steel reinforced concrete beam, and can ensure the common working performance of concrete and section steel; meanwhile, the prestress technology is used, so that the stress performance of the beam is effectively improved, the beam rigidity is improved, the section area is reduced, the cracking load is improved, and the stress performance in the use stage is enhanced; according to the utility model provides a design method, can further optimize the position, size and the form that the web opened a hole circular, ellipse, rectangle, prestressing force steel strand wires arrange form linear type, parabola type, cast in situ concrete's intensity level recycled concrete, lightweight aggregate concrete, sound insulation concrete to satisfy the actual demand of different engineering.

Claims (7)

1. The utility model provides a prestressing force part outsourcing steel T shape combination beam, includes prestressing force prefabricated rectangle combination beam (1) and cast in situ concrete flange board (2) two parts, its characterized in that:
the prestressed prefabricated rectangular composite beam (1) comprises:
a honeycomb-shaped steel (101);
the lacing wires (103) are arranged in the holes of the honeycomb steel (101) and are perpendicular to the web plate of the honeycomb steel (101);
the closed stirrups (102) are arranged between flanges of the honeycomb steel (101) and symmetrically distributed on two sides of the web, and the plane where the closed stirrups (102) are located is perpendicular to the web;
the first longitudinal ribs (105) are arranged on the upper portion of the lower flange of the honeycomb section steel (101) and are parallel to the length direction of the honeycomb section steel (101);
a plurality of second longitudinal ribs (107) which are arranged at the lower part of the upper flange of the honeycomb-shaped steel (101) and are parallel to the length direction of the honeycomb-shaped steel (101);
the prestressed steel strands (104) are arranged on the upper portion of the lower flange of the honeycomb section steel (101) and are parallel to the length direction of the honeycomb section steel (101);
prefabricated Ultra High Performance Concrete (UHPC) (106) filled between the upper flange and the lower flange of the honeycomb structural steel (101);
and the number of the first and second groups,
a plurality of pegs (108) which are arranged at the top of the upper flange of the honeycomb steel (101) and are at equal intervals;
the cast-in-place concrete flange plate (2) comprises:
double-layer bidirectional steel bars (201) arranged in the cast-in-place flange plate;
the cast-in-place concrete (202) is filled at the top of the prestressed prefabricated rectangular composite beam (1), and the cast-in-place concrete (202) is used for pouring and coating the double-layer bidirectional steel bars (201).
2. The partially prestressed T-shaped composite girder according to claim 1, wherein the honeycomb structural steel (101) is formed by uniformly opening holes in a web thereof using high-strength i-steel or by cutting and welding high-strength steel plates.
3. The partially prestressed externally-wrapped steel T-shaped composite beam according to claim 1, wherein the tie bar (103) is welded at the position where the honeycomb steel (101) is in contact with the hole, is bound and fixed with the closed stirrups (102) at two sides, and is made of a steel bar with the diameter larger than or equal to that of the closed stirrups (102); the closed stirrups (102) are located at holes of the honeycomb type steel (101), the lower portions of the first longitudinal reinforcements (105) and the closed stirrups (102) on the two sides are bound, the upper portions of the second longitudinal reinforcements (107) and the closed stirrups (102) on the two sides are bound, and the prefabricated ultrahigh-performance concrete (106) is formed into a whole on the two sides of a web plate of the honeycomb type steel (101) through one-time pouring and does not exceed the honeycomb type steel (101) in the length direction.
4. The partially prestressed outsourcing steel T-shaped composite beam according to claim 1, wherein the prestressed steel strands (104) penetrate through the pre-embedded corrugated pipe, the corrugated pipe is fixed to the lower side of the tie bar (103), the arrangement form of the prestressed steel strands (104) is linear or parabolic according to specific engineering conditions, and the prestressed steel strands (104) are tensioned to a design value by a post-tensioning method.
5. The partially prestressed, steel-clad, T-shaped composite girder according to claim 1, wherein said stud (108) is connected to the honeycomb-shaped steel (101) by welding, and is arranged according to design requirements.
6. The partially prestressed steel-clad T-shaped composite girder according to claim 1, wherein the double-layered bidirectional reinforcing steel bars (201) in the cast-in-place flange plate are equally spaced in the longitudinal and lateral directions.
7. The partially prestressed, steel-clad, T-shaped composite girder according to claim 1, wherein said cast-in-place concrete (202) is made of general concrete.
CN202120478605.7U 2021-03-05 2021-03-05 Prestressed part outsourcing steel T shape combination beam Active CN214575128U (en)

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CN202120478605.7U CN214575128U (en) 2021-03-05 2021-03-05 Prestressed part outsourcing steel T shape combination beam

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Application Number Priority Date Filing Date Title
CN202120478605.7U CN214575128U (en) 2021-03-05 2021-03-05 Prestressed part outsourcing steel T shape combination beam

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Publication Number Publication Date
CN214575128U true CN214575128U (en) 2021-11-02

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