CN105089204A - Cold-formed thin-walled ribbed U-shaped steel-encased concrete laminated slab composite beam - Google Patents
Cold-formed thin-walled ribbed U-shaped steel-encased concrete laminated slab composite beam Download PDFInfo
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Abstract
The invention discloses a cold-formed thin-walled ribbed U-shaped steel-encased concrete laminated slab composite beam, and belongs to a composite beam, for solving the problems that lots of formworks are needed, the construction period is long, and the production is difficult to realize industrialization in cast-in-place reinforced concrete beams and slabs. The cold-formed thin-walled ribbed U-shaped steel-encased concrete laminated slab composite beam comprises a cold-formed thin-walled ribbed U-shaped steel beam on a lower part, a precast concrete slab, a continuous longitudinal reinforcement cage, a broken-line type tie bar and concrete, wherein the cold-formed thin-walled ribbed U-shaped steel beam is provided with a bottom plate, two web plates and two internally-rolled flange plates, and exhaust holes are designed in each flange plate; and a concrete precast bottom plate is arranged on the upper flange of the ribbed U-shaped steel beam, and the concrete is poured on the surface layer of the concrete precast bottom plate, in strip-shaped through holes in end parts, and in the ribbed U-shaped steel beam. The cold-formed thin-walled ribbed U-shaped steel-encased concrete laminated slab composite beam disclosed by the invention is simple in structure, good in fire-resistant performance and overall stability, high in combination action, convenient and fast in construction, capable of realizing industrialized production, remarkable in economic benefits, and capable of being used in floor structures of civil engineering buildings.
Description
Technical field
The present invention relates to a kind of compound beam, be specifically related to a kind of cold bending thin wall U-shaped outsourcing steel-concrete folding plate combined beam with ribbing, belong to building structure technology field.
Background technology
Steel-encased Concrete Composite Beams can give full play to the performance of steel tension and concrete anti-compression because of it, and it is large to have rigidity, and the advantages such as good stability, are widely applied in Practical Project.In order to ensure enough reinforcing bars for bearing pulling force suffered by girder steel bottom, the base plate thickness of Covered with Angles is greater than the thickness on web and the edge of a wing usually, by being welded to connect between base plate and web.And in order to ensure that compound beam still has certain bearing capacity in case of fire, compound beam generally need arrange extra fire protection construction reinforcing bar.Adopt the Covered with Angles compound beam of Bars In Poured Concrete Slab, although the good integrity of Bars In Poured Concrete Slab, anti-seismic performance is good, needs a large amount of templates, long construction period, produces and is difficult to realize industrialization.
By literature search, have a kind of Steel-encased Concrete Composite Beams in prior art, this compound beam adopts clod wash C type decorative pattern girder steel, and do not place fire-resistance or Reinforcement in beam rib, girder steel top flange does not also arrange tie rod.If do not add beam bottom mother plate during construction, easily there is distortional buckling in girder steel.If operational phase runs into fire, the bearing capacity of compound beam will can not be guaranteed.The section of cold-formed thin-walled C steel beam top flange because of its shear-carrying capacity lower, not easily ensure girder steel and the complete collaborative work of concrete.Also have a kind of U-shaped steel-concrete composite beam in prior art, when adopting precast concrete plank, for ensureing the bearing capacity on the overhanging edge of a wing of compound beam U-shaped steel in construction, needing to arrange support in bottom, the edge of a wing, and adopting concrete cast-in-place slab, then needing a large amount of template; The welding capacity needed as the angle steel of shearing-resistant member is larger, and the Reinforcement of unsettled placement can not improve the bending rigidity of U-shaped girder steel in the construction stage.
Summary of the invention
The object of the invention is to solve U-shaped steel-concrete composite beam to execute man-hour requirement and arrange support in bottom, the overhanging edge of a wing, thick base plate and web need to adopt solder design, take a lot of work, long construction period, and Reinforcement does not play effect in the construction stage, and the bearing capacity of cold bending thin wall Steel-encased Concrete Composite Beams is lower, be difficult under fire condition ensure safety, if the problem of beam bottom mother plate need be added during construction.
The technical scheme adopted for realizing the object of the invention is such, a kind of cold bending thin wall U-shaped outsourcing steel-concrete folding plate combined beam with ribbing, is characterized in that: comprise cold bending thin wall U-shaped girder steel with ribbing, elongated Reinforcement, fold-line-shaped connecting reinforcement, reinforced concrete prefabricated base plate and longitudinal reinforcement, transverse reinforcement and concrete.
Described cold bending thin wall U-shaped girder steel lower end closed with ribbing, upper end are uncovered.The both sides that the upper end of described cold bending thin wall U-shaped girder steel with ribbing is uncovered have crimping.Described crimping have some steam vents.
Described fold-line-shaped connecting reinforcement is welded on the both sides crimping of the upper end of cold bending thin wall U-shaped girder steel with ribbing.
Described reinforced concrete prefabricated base plate is shelved on the top of described cold bending thin wall U-shaped girder steel with ribbing.Described reinforced concrete prefabricated base plate is made up of the vertical muscle be parallel to each other and the concrete be cast in these vertical muscle.The centre of described reinforced concrete prefabricated base plate has strip through-hole.Only there is vertical muscle to pass through in this strip through-hole, and there is no concreting.This strip through-hole is positioned at uncovered top, the upper end of described cold bending thin wall U-shaped girder steel with ribbing.
The some longitudinal reinforcements be parallel to each other of topping laying of described reinforced concrete prefabricated base plate, and some transverse reinforcements be parallel to each other.Monobloc cast concrete in the surface layer of reinforced concrete prefabricated base plate and the cavity of cold bending thin wall U-shaped girder steel with ribbing.
Further, the some described elongated Reinforcements be parallel to each other are positioned among the inner chamber of cold bending thin wall U-shaped girder steel with ribbing, link together with the base plate of cold bending thin wall U-shaped girder steel with ribbing.
Further, described cold bending thin wall U-shaped girder steel with ribbing adopts thin-walled steel plate cold bending to make, and inner surface of steel plate can lay decorative pattern can not have decorative pattern yet.U-shaped girder steel with ribbing is made up of Q235 steel, Q345 steel, Q390 steel or Q420 or Q460 steel.
Further, described Reinforcement adopts HRB335 reinforcing bar, HRB400 reinforcing bar or RRB400 reinforcing bar to make, and is welded on the base plate of cold bending thin wall U-shaped girder steel with ribbing.
Further, described fold-line-shaped connecting reinforcement adopts HPB300 reinforcing bar, HRB335 reinforcing bar, HRB400 reinforcing bar or RRB400 reinforcing bar to make.
Further, described concrete prefabricated base plate can adopt ordinary reinforced concrete precast plate, prestressed concrete precast plate or PK prestressed concrete floor slab.
Further, described longitudinal reinforcement and transverse reinforcement are made up of HPB300 reinforcing bar, HRB335 reinforcing bar, HRB400 reinforcing bar or RRB400 reinforcing bar.
Further, described concrete is C25-C80 ordinary concrete, light weight aggregate concrete, high performance concrete or regeneration concrete.
Technique effect of the present invention is mathematical:
1, on the base plate of cold bending thin wall U-shaped steel with ribbing, weld elongated steel bar stress, the base plate had compared with large rigidity can be formed, bear working load together with web.Stressed vertical muscle doublely can do fire-resistance reinforcing bar, not only can avoid the use of fireproof paint, has saved material and a large amount of manpower, but also can reduce amount of reinforcement.
2, the fold-line-shaped steel tie on cold bending thin wall U-shaped girder steel top with ribbing can improve the resistance to overturning of opening U-shaped girder steel with ribbing, strengthens the adhesion stress between cast-in-situ concrete and girder steel, improves the longitudinal shear resistance ability between top concrete slab and steel beam flange.
3, reserved on U-shaped girder steel with ribbing steam vent can ensure that the Concrete Filled of re-entrant angle in U-shaped girder steel is closely knit.
4, adopt superimposed sheet and cold bending thin wall U-shaped steel with ribbing can solve cast in situ reinforced concrete beam and floor to need to use a large amount of template, the problem of long construction period.Precast concrete base plate can at produce in factory, and cold bending thin wall type U-shaped steel with ribbing and elongated steel bar stress also can weld at produce in factory, are easy to ensure the quality of products, realize the industrialization of producing, good in economic efficiency.
Accompanying drawing explanation
Fig. 1 is the profile of cold bending thin wall U-shaped Covered with Angles-concrete folding plate combined beam with ribbing.
Fig. 2 is with ribbing U-shaped girder steel and the reinforcement detailing schematic diagram thereof of cold bending thin wall U-shaped Covered with Angles-concrete folding plate combined beam with ribbing.
In figure: 1 is cold bending thin wall U-shaped girder steel with ribbing; 2 is elongated Reinforcement; 3 is steam vent; 4 is fold-line-shaped connecting reinforcement; 5 is reinforced concrete prefabricated board; 6 is longitudinal reinforcement; 7 is transverse reinforcement; 8 is concrete; 9 is vertical muscle in reinforced concrete prefabricated board.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described, but should not be construed the above-mentioned subject area of the present invention and be only limitted to following embodiment.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and customary means, make various replacement and change, all should be included in protection scope of the present invention.
A kind of cold bending thin wall U-shaped outsourcing steel-concrete folding plate combined beam with ribbing, comprises vertical muscle 9 in cold bending thin wall U-shaped girder steel 1 with ribbing, elongated Reinforcement 2, fold-line-shaped connecting reinforcement 4, reinforced concrete prefabricated base plate 5 and longitudinal reinforcement 6, transverse reinforcement 7, concrete eight and reinforced concrete prefabricated board.
See Fig. 2, the cross section of described cold bending thin wall U-shaped girder steel 1 with ribbing is rectangle, have in inner chamber.Lower end closed, the upper end of described cold bending thin wall U-shaped girder steel 1 with ribbing are uncovered.The both sides that the upper end of described cold bending thin wall U-shaped girder steel 1 with ribbing is uncovered have crimping.Namely described crimping is the top flange of girder steel, its upper surface level.Described crimping have some steam vents 3.These steam vents being set, when being to ensure concreting, the inner chamber of completely described cold bending thin wall U-shaped girder steel 1 with ribbing can being filled.
The some described elongated Reinforcements 2 be parallel to each other are positioned among the inner chamber of cold bending thin wall U-shaped girder steel 1 with ribbing, link together with the base plate of cold bending thin wall U-shaped girder steel 1 with ribbing.
As described in Figure 2, described fold-line-shaped connecting reinforcement 4 is welded on the both sides crimping of the upper end of cold bending thin wall U-shaped girder steel 1 with ribbing.In embodiment, according to span and the suffered operative condition of cold bending thin wall U-shaped outsourcing steel-concrete folding plate combined beam with ribbing, determine the suitable cold bending thin wall sectional dimension of U-shaped girder steel 1 with ribbing, the diameter of elongated Reinforcement 2 and quantity, and the diameter of fold-line-shaped connecting reinforcement 4 and bending size etc.
Described reinforced concrete prefabricated base plate 5 is shelved on the top of described cold bending thin wall U-shaped girder steel 1 with ribbing.Described reinforced concrete prefabricated base plate 5 is made up of the vertical muscle 9 be parallel to each other and the concrete be cast in these vertical muscle 9.The centre of described reinforced concrete prefabricated base plate 5 has strip through-hole, and this strip through-hole is positioned at uncovered top, the upper end of described cold bending thin wall U-shaped girder steel 1 with ribbing, and in two block concrete prefabricated panels, overhanging section of vertical muscle 9 overlaps in this strip through-hole.
The some longitudinal reinforcements 6 be parallel to each other of the topping laying of described reinforced concrete prefabricated base plate 5, and some transverse reinforcements 7 be parallel to each other.Monobloc cast concrete eight in the cavity of the surface layer of reinforced concrete prefabricated base plate 5, the strip through-hole of prefabricated panel end and cold bending thin wall U-shaped girder steel 1 with ribbing.
The cold bending thin wall U-shaped girder steel 1 with ribbing of the present embodiment, elongated Reinforcement 2, fold-line-shaped connecting reinforcement 4, reinforced concrete prefabricated base plate 5 form in factory process.First on the top flange (crimping) of U-shaped girder steel, steam vent is got, and then just elongated Reinforcement 2 is connected by the side mode of weldering with the inner side of cold bending thin wall U-shaped girder steel 1 lower shoe with ribbing, finally fold-line-shaped connecting reinforcement 4 is welded in the top flange of U-shaped girder steel 1 with ribbing.
Engineering site construction sequence is: the cold bending thin wall U-shaped girder steel with ribbing that lifting emplace assembles, and lays reinforced concrete prefabricated base plate 5, the longitudinal reinforcement 6 on colligation precast plate surface layer, transverse reinforcement 7, last concreting 8.
Claims (8)
1. a cold bending thin wall U-shaped outsourcing steel-concrete folding plate combined beam with ribbing, is characterized in that: comprise cold bending thin wall U-shaped girder steel (1) with ribbing, elongated Reinforcement (2), fold-line-shaped connecting reinforcement (4), reinforced concrete prefabricated base plate (5) and longitudinal reinforcement (6), transverse reinforcement (7) and concrete (8);
Described cold bending thin wall U-shaped girder steel with ribbing (1) lower end closed, upper end are uncovered; The both sides that the upper end of described cold bending thin wall U-shaped girder steel with ribbing (1) is uncovered have crimping; Described crimping have some steam vents (3);
Described fold-line-shaped connecting reinforcement (4) is welded on the both sides crimping of the upper end of cold bending thin wall U-shaped girder steel (1) with ribbing;
Described reinforced concrete prefabricated base plate (5) is shelved on the top of described cold bending thin wall U-shaped girder steel (1) with ribbing; Described reinforced concrete prefabricated base plate (5) is made up of the vertical muscle (9) be parallel to each other and the concrete be cast in these vertical muscle (9); The centre of described reinforced concrete prefabricated base plate (5) has strip through-hole; This strip through-hole is positioned at uncovered top, the upper end of described cold bending thin wall U-shaped girder steel with ribbing (1); Vertical muscle (9) is only had to pass through in this strip through-hole.
The some longitudinal reinforcements (6) be parallel to each other of the topping laying of described reinforced concrete prefabricated base plate (5), and some transverse reinforcements (7) be parallel to each other; Monobloc cast concrete (8) in the cavity of the surface layer in reinforced concrete prefabricated base plate (5), bottom end strip through-hole and cold bending thin wall U-shaped girder steel (1) with ribbing.
2. a kind of cold bending thin wall according to claim 1 U-shaped outsourcing steel-concrete folding plate combined beam with ribbing, it is characterized in that: the some described elongated Reinforcements (2) be parallel to each other are positioned among the inner chamber of cold bending thin wall U-shaped girder steel (1) with ribbing, link together with the base plate of cold bending thin wall U-shaped girder steel (1) with ribbing.
3. a kind of cold bending thin wall according to claim 1 U-shaped outsourcing steel-concrete folding plate combined beam with ribbing, is characterized in that: described cold bending thin wall U-shaped girder steel with ribbing adopts thin-walled steel plate cold bending to make, and inner surface of steel plate can lay decorative pattern can not have decorative pattern yet; U-shaped girder steel with ribbing is made up of Q235 steel, Q345 steel, Q390 steel or Q420 or Q460 steel.
4. a kind of cold bending thin wall according to claim 1 U-shaped outsourcing steel-concrete folding plate combined beam with ribbing, it is characterized in that: described Reinforcement (2) adopts HRB335 reinforcing bar, HRB400 reinforcing bar or RRB400 reinforcing bar to make, and is welded on the base plate of cold bending thin wall U-shaped girder steel (1) with ribbing.
5. a kind of cold bending thin wall according to claim 1 U-shaped outsourcing steel-concrete folding plate combined beam with ribbing, is characterized in that: described fold-line-shaped connecting reinforcement (4) adopts HPB300 reinforcing bar, HRB335 reinforcing bar, HRB400 reinforcing bar or RRB400 reinforcing bar to make.
6. a kind of cold bending thin wall according to claim 1 U-shaped outsourcing steel-concrete folding plate combined beam with ribbing, is characterized in that: described concrete prefabricated base plate (5) can adopt ordinary reinforced concrete precast plate, prestressed concrete precast plate or PK prestressed concrete floor slab.
7. a kind of cold bending thin wall according to claim 1 U-shaped outsourcing steel-concrete folding plate combined beam with ribbing, is characterized in that: described longitudinal reinforcement (6) and transverse reinforcement (7) are made up of HPB300 reinforcing bar, HRB335 reinforcing bar, HRB400 reinforcing bar or RRB400 reinforcing bar.
8. a kind of cold bending thin wall according to claim 1 U-shaped outsourcing steel-concrete folding plate combined beam with ribbing, is characterized in that: described concrete (8) is C25-C80 ordinary concrete, light weight aggregate concrete, high performance concrete or regeneration concrete.
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| CN106284840A (en) * | 2016-09-22 | 2017-01-04 | 广东省建筑设计研究院 | A kind of second pouring steel reinforced concrete frame beam and construction method thereof |
| CN107905083A (en) * | 2017-12-22 | 2018-04-13 | 长安大学 | A kind of the inversion type clod wash U-shaped steel combination beam bridge and construction method of lacing connection |
| CN109610707A (en) * | 2018-12-12 | 2019-04-12 | 大连理工大学 | A kind of design and rapid constructing method of prefabricated girder steel and floor fit flush |
| CN109722977A (en) * | 2019-01-31 | 2019-05-07 | 深圳市综合交通设计研究院有限公司 | A kind of Composite Steel-Concrete Bridges and its construction method with novel deck structrue |
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| CN110396914A (en) * | 2019-07-11 | 2019-11-01 | 重庆大学 | U-shaped Steel Thin-Wall-prestressed concrete combination beam and its construction method |
| CN111502262A (en) * | 2020-04-15 | 2020-08-07 | 广西建工集团第五建筑工程有限责任公司 | Prefabricated beam pouring template assembly, concrete structure and construction method of concrete structure |
| CN111980157A (en) * | 2020-08-26 | 2020-11-24 | 长安大学 | Open steel pipe concrete structure with cold-bending turned edge and batten plate |
| CN113216380A (en) * | 2021-05-24 | 2021-08-06 | 哈尔滨工业大学 | Steel-concrete composite beam and concrete-filled steel tubular column joint and construction method |
| CN113898123A (en) * | 2021-10-19 | 2022-01-07 | 哈尔滨工业大学 | U-shaped steel-solid waste concrete composite beam with composite structure and construction method |
| CN113898123B (en) * | 2021-10-19 | 2023-01-31 | 哈尔滨工业大学 | U-shaped steel-solid waste concrete composite beam with composite structure and construction method |
| CN114135040A (en) * | 2021-12-06 | 2022-03-04 | 北京清盛建工程技术研究院有限公司 | Steel-concrete combined rib prestressed concrete laminated slab |
| CN114541583A (en) * | 2022-02-23 | 2022-05-27 | 徐明辉 | Prefabricated beam column assembly type system and construction method thereof |
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Application publication date: 20151125 |