CN103061453B - Double-perforated steel plate-concrete combined coupling beam - Google Patents
Double-perforated steel plate-concrete combined coupling beam Download PDFInfo
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- CN103061453B CN103061453B CN201310034126.6A CN201310034126A CN103061453B CN 103061453 B CN103061453 B CN 103061453B CN 201310034126 A CN201310034126 A CN 201310034126A CN 103061453 B CN103061453 B CN 103061453B
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Abstract
The invention discloses a double-perforated steel plate-concrete combined coupling beam comprising a concrete beam, and a reinforcement framework arranged in the concrete beam and formed by longitudinal reinforcements, waist reinforcements and stirrups horizontally wound around the longitudinal reinforcements and the waist reinforcements, a reinforced concrete coupling beam is formed by the concrete beam and the reinforcement framework, a section steel framework including the double perforated steel plates are arranged in the reinforced concrete coupling beam, and a combined coupling beam is formed by the reinforced concrete coupling beam and the section steel framework; and the section steel framework is composed of a pair of perforated steel plates distributed symmetrically, a binding bar connecting the pair of perforated steel plates and shear-resistant studs vertically and uniformly distributed on the pair of perforated steel plates, and the pair of perforated steel plates is provided with holes respectively. According to the double-perforated steel plate-concrete combined coupling beam, the resistance moment is jointly resisted by the reinforced concrete and the perforated steel plates, the good bearing capacity and the plastic deformation capacity of the steel plates are utilized for resisting shearing, and an energy dissipation mechanism is achieved by the holes so that the bonding of the steel and the concrete is strengthened; and therefore, the shear capacity and the ductility and energy dissipation capacity of the coupling beam are obviously improved, and consequently the seismic performance of the coupling beam is greatly improved.
Description
Technical field
The present invention relates to the composite coupling beams of steel performance and combination construction, particularly a kind of steel-concrete composite coupling beams, i.e. perforate double steel plate-Combined concrete coupling beam.
Background technology
Coupling beam is the key member in wall of High-building or core wall structure system, and be the emphasis component of domestic and international civil engineering scholar research, be that main object has carried out a large amount of research work with reinforced concrete coupling beams always at present.By improving coupling beam form of reinforcement and material composition, improving component shear-carrying capacity, improving the ductility of coupling beam, become one of Main way of coupling beam research.In recent years, the most structure of China still adopts reinforced concrete coupling beams, but research shows, reinforced concrete coupling beams is under various novel arrangement of reinforcement scheme, although comprehensive anti-seismic performance increases, but still there is shear resistance deficiency, shear failure is serious, and hysteresis loop has the problems such as obvious rheostriction, by means of only raising stirrup amount and form of reinforcement to raising coupling beam ductility and shear resistance be limited.For reinforced concrete coupling beams Problems existing, to improve for the purpose of stress performance and anti-seismic performance, researcher proposes to use steel-concrete composite coupling beams to carry out alternative reinforcing bar reinforced concrete coupling beams, steel-concrete composite coupling beams has good ductility and energy dissipation capacity, is applicable to the earthquake zone that macroseism is set up defences.But the current combining form of steel-concrete composite coupling beams is also more single, there is complex structure, constructional difficulties, the shortcoming such as less economical, and slippage reduces the shortcomings such as coupling beam bearing capacity and energy dissipation capacity between Steel concrete, therefore, explore the New Type of Coupling Beam combining form that anti-seismic performance is more excellent and construct convenient, make it give full play to steel and concrete performance separately, just become highrise building and high seismic intensity area application steel-concrete composite coupling beams time problem demanding prompt solution.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of new type section form steel-concrete composite coupling beams, i.e. perforate double steel plate-Combined concrete coupling beam, overcome the shortcoming of conventional steel bar concrete coupling beam ductility and energy dissipation capacity difference, thus greatly improve the anti-seismic performance of coupling beam.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of perforate double steel plate-Combined concrete coupling beam, comprise concrete beam and be arranged in concrete beam by longitudinal reinforcement, waist muscle, longitudinally reinforcing bar and waist muscle level around the steel bar framework that formed of stirrup, reinforced concrete coupling beams is formed by concrete beam and steel bar framework, the structural steel frame comprising perforate double steel plate is set in described reinforced concrete coupling beams, forms composite coupling beams by reinforced concrete coupling beams and structural steel frame; The shear stud that described structural steel frame is arranged by a pair symmetrical open pore steel plate, the binding bar connecting described a pair open pore steel plate and a pair open pore steel plate surface Vertical Uniform is formed, and described a pair open pore steel plate has perforate hole.
Further, described in be placed in the hole-opening opening's edge open pore steel plate of the open pore steel plate in reinforced concrete coupling beams symmetrical up and down, and perforate the hole circular or biserial rectangle that is biserial.
Further, described longitudinally reinforcing bar level around the stirrup perforate hole symmetrical with biserial correspondingly to connect.
Further, the shear stud of described open pore steel plate surface Vertical Uniform layout is along open pore steel plate surface distributed.
Further, the binding bar of described connection open pore steel plate is uniform along the perforate hole periphery that open pore steel plate distributes.
Further, described binding bar is screw-type structure or sews plank frame.
Further, the centre distance of described a pair open pore steel plate is 1/6 ~ 2/3 of composite coupling beams breadth of section.
Further, the height of described open pore steel plate is not less than 70% of cross-section of coupling beam height, and the ratio of height to thickness of open pore steel plate is not more than 100.
Further, the cross section of described composite coupling beams is joined steel rate and is not less than 2.0%.
Further, on described open pore steel plate, the percent opening at perforate hole is 5% ~ 20%.
The invention has the beneficial effects as follows:
Perforate double steel plate-Combined concrete coupling beam is by steel concrete and the common resist torque of open pore steel plate, the supporting capacity utilizing steel plate good and plastic deformation ability carry out shearing resistance, steel plate has multi-form hole, to realize energy dissipation mechanism, strengthen the bonding of Steel concrete simultaneously, formation concrete peg and shear stud combining form ensure steel plate and concrete acting in conjunction, prevent coupling beam generation brittle fracture, shear-carrying capacity and the ductility energy dissipation capacity of coupling beam can be significantly improved, thus greatly improve the anti-seismic performance of ordinary reinforced concrete coupling beam.Perforate double steel plate-Combined concrete coupling beam simple structure compared with cross reinforcement coupling beam, eliminates cross reinforcement the structure difficulty brought and the shortcomings such as complexity of constructing; Compared with steel coupling beam, steel reinforced concrete coupling beam or steel-enclosed concrete members coupling beam, because steel plate is plane component, eliminate other girder steels and be connected the structure difficult problem occurred with wall limb, during as being connected with wall limb, do not affect the continuity of longitudinal reinforcement in wall limb edge member, without the need to boring a hole on shaped steel, greatly facilitate construction.
Under large shake effect, concrete greatly reduces individual layer steel plate to the effect of contraction of built-in steel plate and under course under cyclic loading, more easily flexing and unstability occurs and high-strength concrete uses the problems such as limited, built-in double steel plate in reinforced concrete coupling beams, by binding bar, two panels steel plate is formed an entirety, add the restriction ability of steel plate to core concrete, and utilize shear stud to reduce the slippage between steel plate and concrete, improve steel plate and surrounding concrete collaborative work ability, thus significantly improve the anti-seismic performance of coupling beam.When described binding bar adopts screw-type binding bar to connect, when shear stud and Plate Welding, bolt connection combines with both welding, can alleviate the impact of welding residual stress, significantly reduces steel plate thickness simultaneously, saves or reduces welding procedure in a large number, reduces construction costs.
The present invention absorbs the advantage of reinforced concrete coupling beams and steel reinforced concrete coupling beam, and external wrapping concrete solves the fire safety problem of girder steel, and concrete lateral restraint effect effectively can prevent the outer destabilization problems of the plane of steel plate.By adjusting the parameters such as the size of the aspect ratio of steel plate, percent opening size, binding bar and peg and spacing, different designing requirements can be met, there is very large flexibility and compliance.This kind of perforate double steel plate-Combined concrete coupling beam, can be applied, the particularly highrise building in seismic fortification intensity more than 8 degree areas in the building in highrise building and high earthquake intensity area.
Accompanying drawing explanation
Fig. 1 is the schematic cross-section of perforate double steel plate-Combined concrete coupling beam;
Fig. 2 is that perforate double steel plate-Combined concrete coupling beam joins steel and arrangement of reinforcement embodiment 1 structural representation.
Fig. 3 is that perforate double steel plate-Combined concrete coupling beam joins steel and arrangement of reinforcement embodiment 2 structural representation.
In figure: 1 is open pore steel plate, 2 is binding bar, and 3 is shear stud, and 4 is longitudinal reinforcement, and 5 is stirrup, and 6 is waist muscle, and 7 is perforate hole.
Detailed description of the invention
Below in conjunction with instantiation and accompanying drawing, the present invention will be further described.It should be noted that, following embodiment is only limitted to explanation of the invention, but does not limit practical range of the present invention.The increase of every structure of making on this programme basis or with the replacement of same content, all should belong to protection scope of the present invention.
As shown in Figure 1, this perforate double steel plate-Combined concrete coupling beam, comprise concrete beam, and be arranged in concrete beam by longitudinal reinforcement 4, waist muscle 6, longitudinally reinforcing bar 4 and waist muscle 6 level around the steel bar framework that formed of stirrup 5, reinforced concrete coupling beams is formed by concrete beam and steel bar framework, wherein: in reinforced concrete coupling beams, be provided with the structural steel frame comprising perforate double steel plate, composite coupling beams is formed by reinforced concrete coupling beams and structural steel frame, structural steel frame is by pair of parallel and symmetrical open pore steel plate 1, connect the binding bar 2 between a pair open pore steel plate 1 and form along the shear stud 3 of a pair surperficial Vertical Uniform layout of open pore steel plate 1, a pair open pore steel plate 1 has perforate hole 7.
As shown in Figure 2, the perforate hole 7 being placed in a pair open pore steel plate 1 in reinforced concrete coupling beams arranges symmetrical along open pore steel plate about 1 two, and perforate hole 7 is biserial circle; From in figure, longitudinally reinforcing bar 4 level around the stirrup 5 perforate hole 7 symmetrical with biserial correspondingly to connect; The shear stud 3 arranged at the surperficial Vertical Uniform of open pore steel plate 1 has several along open pore steel plate 1 surface distributed; Further, the binding bar 2 connecting open pore steel plate 1 is uniform along perforate hole 7 periphery of distribution on open pore steel plate 1, and binding bar 2 is for screw-type structure or sew plank frame.Sewing plank frame is that steel plate bilateral symmetry is welded with several stiffening ribs, stiffening rib welding consisted of fritter Thin Rectangular steel batten plate.
The structural steel frame embedded shown in Fig. 1 in reinforced concrete coupling beams adopts perforate double steel plate 1, and adopt the overall steelframe in space of a pair open pore steel plate and longitudinal reinforcement 4, waist muscle 6 and quadrangle stirrup 5 formation being provided with shear stud 3 and binding bar 2 connection, constraint core concrete and with its co-operation, ensure bearing capacity and the anti-seismic performance of steel plate and concrete composite coupling beam.
Binding bar perforate double steel plate of the present invention is designed to integrative-structure, and namely pair of holes double steel plate 1 adopts binding bar 2 to connect, and shear stud 3 is welded on steel plate 1, and wherein perforate double steel plate-Combined concrete coupling beam joins steel and arrangement of reinforcement as shown in Figure 2.
Figure 3 shows that another kind of embodiment of the present invention, its structure is substantially the same manner as Example 1, difference is, perforate hole 7 is biserial rectangular configuration, in the structure shown here, longitudinally reinforcing bar 4 level around the stirrup 5 perforate hole 7 symmetrical with biserial in biserial rectangle upper, middle and lower correspondingly to connect.
Perforate double steel plate-Combined concrete the coupling beam of the present invention by being made up of above-mentioned perforate double steel plate, binding bar (comprising screw-type binding bar or batten plate), longitudinal reinforcement, stirrup, waist muscle and shear stud, overcome the shortcoming of conventional steel bar concrete coupling beam ductility and energy dissipation capacity difference, anti-seismic performance and the application property of coupling beam can be strengthened.Finite Element Method is utilized to carry out the comparative analysis of anti-seismic performance to common diagonal angle diagonal bar coupling beam and perforate of the present invention double steel plate-Combined concrete coupling beam, result shows, perforate double steel plate-Combined concrete coupling beam has larger deformability and ductility factor, hysteresis loop is plentiful, shows very strong antidetonation energy absorption ability.
In order to ensure enough supporting capacitys and anti-seismic performance, the centre distance of a pair open pore steel plate is 1/6 ~ 2/3 of composite coupling beams breadth of section, the height of open pore steel plate should not be less than 70% of cross-section of coupling beam height, the ratio of height to thickness of open pore steel plate is not more than 100, and the percent opening of open pore steel plate is advisable 5% ~ 20%.The steel rate of joining of composite coupling beams can not be too low, can not be too high, and it is very few that open pore steel plate configures, and misses one's aim, but the too much of open pore steel plate configuration increases construction costs again.Binding tests research and China's national situation, it is 7.0% that perforate double steel plate-Combined concrete cross-section of coupling beam the best of the present embodiment joins steel rate, and perforate hole 7 optimum opening porosity is 12%, and the centre distance of a pair open pore steel plate is that 1/3 of composite coupling beams breadth of section is advisable.When coupling beam span-depth radio is 2.5, join steel rate and the perforate double steel plate-Combined concrete coupling beam of percent opening in this certain limit, its energy consuming ratio and ductility factor improve 51.99% and 82.86% respectively than the common diagonal angle diagonal bar coupling beam of same cross-sectional size and span-depth radio.
Following table 1 gives comparing of the present invention and common diagonal angle diagonal bar coupling beam anti-seismic performance.
Table 1 the present invention compares with common diagonal angle diagonal bar coupling beam energy consuming ratio and ductility factor
In order to steel plate and concrete collaborative work can be guaranteed better, it is completely necessary that perforate double steel plate-Combined concrete coupling beam configures the shear stud of some, longitudinal reinforcement, waist muscle and stirrup in cross section, also very effective, in the test that we complete, in composite coupling beams span scope, be all configured with the shear stud of some with anchorage zone, the perforate double steel plate-Combined concrete coupling beam configuring the quadrangle stirrup of some, vertical muscle and waist muscle in coupling beam span scope all shows good anti-seismic performance.
The construction technology of perforate double steel plate-Combined concrete coupling beam of the present invention:
The two panels steel plate of dimension connects as a whole by screw-type binding bar or batten plate by the skeleton of perforate double steel plate-Combined concrete coupling beam as required, according to the percent opening of designing requirement and open-cellular form, steel plate is processed, wherein shear stud is welded in double steel plate surface, all can make in specialized Gang Gou company, then job site is transported to, colligation is carried out again with vertical muscle, waist muscle and stirrup, thus further formwork and concreting.
When employing perforate double steel plate-Combined concrete coupling beam and concrete shear force wall are connected to form and combine Coupled Shear Wall structure, its composite coupling beams anchors into concrete shear force wall need be had enough design lengths or take other anchor measures, guarantee effective connection of wall beam node, perforate double steel plate-Combined concrete coupling beam is finally carried out integrated poured after being connected with concrete shear force wall by design.Perforate double steel plate-Combined concrete the coupling beam designed by the present invention, is improve the energy dissipation capacity of coupling beam, improves the anti-seismic performance of coupling beam, and convenient and quick construction, create certain Social benefit and economic benefit.
Claims (5)
1. perforate double steel plate-Combined concrete coupling beam, comprise concrete beam and be arranged in concrete beam by longitudinal reinforcement (4), waist muscle (6), longitudinally reinforcing bar (4) and waist muscle (6) level around the steel bar framework that formed of stirrup (5), reinforced concrete coupling beams is formed by concrete beam and steel bar framework, it is characterized in that: in described reinforced concrete coupling beams, be provided with the structural steel frame comprising perforate double steel plate, form composite coupling beams by reinforced concrete coupling beams and structural steel frame; The shear stud (3) that described structural steel frame is arranged by symmetrical a pair open pore steel plate (1), the binding bar (2) connecting described a pair open pore steel plate (1) and the surperficial Vertical Uniform of a pair open pore steel plate (1) is formed, and described a pair open pore steel plate (1) has perforate hole (7);
Described binding bar (2) is for screw-type structure or sew plank frame, and sewing plank frame is that steel plate bilateral symmetry is welded with several stiffening ribs, stiffening rib welding consisted of fritter Thin Rectangular steel batten plate;
The centre distance of described a pair open pore steel plate (1) is 1/3 of composite coupling beams breadth of section;
The height of described open pore steel plate (1) is not less than 70% of composite coupling beams depth of section, and the ratio of height to thickness of open pore steel plate (1) is not more than 100;
It is 7.0% that steel rate is joined in the cross section of described composite coupling beams;
The percent opening at the upper perforate hole (7) of described open pore steel plate (1) is 12%;
Described composite coupling beams span-depth radio is 2.5;
Described composite coupling beams energy consuming ratio β is 22.13, and ductility factor μ is 6.4.
2. perforate double steel plate-Combined concrete coupling beam according to claim 1, it is characterized in that: described in be placed in the perforate hole (7) of the open pore steel plate (1) in reinforced concrete coupling beams symmetrical up and down along open pore steel plate (1), and perforate hole (7) circular or biserial rectangle that is biserial.
3. perforate double steel plate-Combined concrete coupling beam according to claim 2, is characterized in that: described longitudinally reinforcing bar (4) level around stirrup (5) the perforate hole (7) symmetrical with biserial correspondingly to connect.
4. perforate double steel plate-Combined concrete coupling beam according to claim 1, is characterized in that: the shear stud (3) that the surperficial Vertical Uniform of described open pore steel plate (1) is arranged is along open pore steel plate (1) surface distributed.
5. perforate double steel plate-Combined concrete coupling beam according to claim 1, is characterized in that: the binding bar (2) of described connection open pore steel plate (1) is uniform along perforate hole (7) periphery of the upper distribution of open pore steel plate (1).
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| CN108560823A (en) * | 2018-03-28 | 2018-09-21 | 攀枝花学院 | PBL puts more energy into type open steel box-concrete combination beam and construction method |
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| CN110258910A (en) * | 2019-06-28 | 2019-09-20 | 中铁大桥科学研究院有限公司 | Aperture sheet metal-ultra-high performance concrete composite structure and its construction method |
| CN110359597B (en) * | 2019-08-15 | 2024-05-14 | 中铁建设集团有限公司 | Cross-layer beam connecting structure and installation method for reinforced bar formwork integrated component shear wall |
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