CN203487700U - Steel mixed composite structural continuous I beam of corrugated steel web - Google Patents
Steel mixed composite structural continuous I beam of corrugated steel web Download PDFInfo
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- CN203487700U CN203487700U CN201320436881.2U CN201320436881U CN203487700U CN 203487700 U CN203487700 U CN 203487700U CN 201320436881 U CN201320436881 U CN 201320436881U CN 203487700 U CN203487700 U CN 203487700U
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Abstract
The utility model relates to I beams, and discloses a steel mixed composite structural continuous I beam of a corrugated steel web. The steel mixed composite structural continuous I beam comprises a corrugated steel web, an upper flange steel plate and concrete composite structure, and a lower flange steel plate, the corrugated steel web is arranged between the upper flange steel plate and the lower flange steel plate, the upper flange steel plate, the lower flange steel plate and the corrugated steel web are all connected through welding, beam body structures are connected through connecting ends or one or more combinations of steel noose so as to form the continuous beam structure, and the flange plate of a pressure-bearing area and concrete are combined so as to form a combined structure. The steel mixed composite structural continuous I beam has the advantages of light structure, small steel quantity, and good anti-seismic property; due to the arrangement of three transition sections of the corner, a straight line section and an arc section are in smooth transition, the problem of stress concentration of the corner is solved, particularly, the pressure-bearing area adopts a steel concrete combined structure with micro strain wave, the steel mixed composite structural continuous I beam has good structural performance and economical efficiency.
Description
Technical field
The utility model relates to i beam, has related in particular to the continuous i beam of a kind of Wavelike steel webplate steel-concrete combined structure.
Background technology
Traditional i beam or steel case beam are according to the requirement of shearing resistance flexing, and the ratio of height to thickness of web is generally in 100:1 left and right, and trapezoidal waveform steel web is due to extremely strong shearing resistance and anti-flexural property, and its ratio of height to thickness is 300:1 greatly.The Wavelike steel webplate adopting in existing Wavelike steel webplate i beam, the waveform of its web is all comprised of straightway and arc section, easily produces stress concentrate in the coupling part of straightway and arc section.Tradition i beam or steel case beam compression flange also adopt steel plate, in pressure zone, adopt steel work can not embody the economy of steel work, as adopt steel-concrete combined structure, the most compressive stress in pressure zone is born by concrete, although can embody economy, but concrete shrinkage and creep characteristic makes itself and the steel work can not cooperative bearing, causes stresses re-distribution phenomenon.
Summary of the invention
The utility model is poor for i beam shear behavior in prior art, total easily produces stress and concentrates, affect the life-span of structure, using clean steel material as compression-member simultaneously, the shortcomings such as cost performance is low, especially in combining structure, concrete shrinkage and creep characteristic makes itself and the steel work can not cooperative bearing, causes stresses re-distribution phenomenon.Provide a kind of cross section rigidity of beam body and the intensity of link high, the waveform of web consists of straightway, changeover portion, arc section three parts, wherein changeover portion can effectively connect straightway and arc section, when solving straightway and being directly connected with arc section, the concentrated problem of stress and employing concrete combined structure are as pressure-bearing framework, load performance is good, the continuous i beam of Wavelike steel webplate steel-concrete combined structure that cost performance is high.Especially adopted the pressure-bearing frange plate with miniature strain wave, on pressure-bearing frange plate, the Wavelike steel webplate steel-concrete combined structure freely-supported i beam of concreting, has solved the stresses re-distribution phenomenon that concrete shrinkage and creep causes.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:
The continuous i beam of Wavelike steel webplate steel-concrete combined structure, comprise a Wavelike steel webplate, top flange steel plate and concrete combined structure, bottom flange steel plate, described Wavelike steel webplate is arranged between top flange steel plate and bottom flange steel plate, top flange steel plate and Wavelike steel webplate are by being welded to connect, Wavelike steel webplate and bottom flange steel plate are by being welded to connect, between single girder construction by one or more be connected in link or steel strand cable, form beam structure, the frange plate in pressure-bearing region and Combined concrete form combining structure, Wavelike steel webplate surface roughness is 50-1000 μ m.Top flange steel plate, bottom flange steel surface roughness are 70-350 μ m.The frange plate in pressure-bearing region is top flange steel plate or bottom flange steel plate, and the frange plate in pressure-bearing region is mainly top flange steel plate in common beam, is bottom flange steel plate in semi girder.
As preferably, the thickness of described Wavelike steel webplate is 2-30mm.
As preferably, the thickness of described Wavelike steel webplate is 2-100mm.
As preferably, described Wavelike steel webplate is the continuous ladder twists and turns steel plate with changeover portion and circular arc-shaped corner, and changeover portion is between straightway and circular arc-shaped corner, and circular arc-shaped corner radius is r, and the radius of changeover portion is R, and R is gradual change radius, and R is ∞-r.The changeover portion one end that is connected with straightway, radius is that R is that trend is infinitely great; The changeover portion one end that is connected with circular arc-shaped corner, radius is that R is that trend equals r, and therefore, by straightway, to circular arc-shaped corner, the radius R of changeover portion equals r for being decreased to gradually from infinity, thereby makes the smooth transition more of straightway and circular arc-shaped corner, and minimizing stress is concentrated.The waveform of web consists of straightway, changeover portion, arc section three parts, wherein changeover portion can effectively connect straightway and circular arc-shaped corner, when solution straightway is directly connected with arc section, the concentrated problem of stress, is suitable for industrial mass manufacture, and mould and manufacturing cost are lower.
As preferably, described Wavelike steel webplate is L along the point of contact wire length of wave height direction
aB, along the point of contact wire length of wavelength direction, be L
bC, L
aB>=L
bC.Wavelike steel webplate equals or is slightly larger than the point of contact wire length along wavelength direction, i.e. L along the point of contact wire length of wave height direction
aB>=L
bCdesign make the shear strength of corrugated sheet steel and steel using amount reach good cost performance, if wavelength direction is long, i.e. L
bC>=L
aBshear behavior obviously reduces, and wavelength direction is too short, and steel using amount obviously increases.Therefore, adopt L
aB>=L
bCdesign, can either, guaranteeing shear strength, can reduce rolled steel dosage again as far as possible.
As preferably, described top flange steel plate is with the miniature strain wave of evagination crest.Traditional corrugated sheet steel is longitudinally substantially without rigidity, with the frange plate of miniature strain wave, longitudinally has rigidity, can pressure-bearing, and the longitudinal rigidity of its miniature strain wave part weakens part and obtains reinforcement because of the cross section of concrete evagination.
As preferably, the wave height of described miniature strain wave be top flange steel plate thickness 3-20 doubly, the wave crest length of evagination part is less than 300mm, the distance between crest and crest is for being greater than 1000mm.The wave height of miniature strain wave adopts 3-20 times of frange plate thickness, the anti-pressure ability weakening because of the existence of miniature strain wave in the time of making edge of a wing steel plate pressurized, the 3-20 increasing by the evagination times of concrete section that frange plate thickness increases makes up, make frange plate can accept the longitudinal contraction of concrete and creep, with concrete cooperative bearing, again longitudinal contraction with creep in process and keep overall construction intensity after process.
Because concreting on pressure-bearing frange plate, concrete exists short-term to shrink and long term creep strain, above-mentioned variation all makes concrete occur the contraction state of total amount one thousandth left and right, and can not work in coordination with contraction with the straight frange plate of tradition of Combined concrete, thereby cause the actual forced status of combining structure and desirable stress to have notable difference, the frange plate that can not work in coordination with contraction takes the lead in having born compressive stress, causes stresses re-distribution phenomenon in combining structure.This patent adopts the way that miniature strain wave is set on straight frange plate, make its longitudinal contraction that can accept concrete and creep, again longitudinal contraction with creep in process and keep structural strength after process, solved the above-mentioned bottleneck problem of combining structure at one stroke.
As preferably, described link is for being welded to connect.
As preferably, being welded to connect of described link adopts first freely-supported, rear continuous connected mode.Continuous connected mode after first freely-supported, be on the one hand because of workshop manufacture, the effects limit such as transportation, lifting length, on the other hand, this method be conducive to each across between camber is set or applies prestressing force.
As preferably, the thickness of described top flange steel plate is greater than or less than the thickness of bottom flange steel plate.Because considering flexing in pressure zone, flexing need not be considered in tensile region, so traditional tensile region is identical with the steel using amount of pressure zone or section area, make tensile region part have the function phenomenon of having more than needed, it is science and uneconomic not, pressure zone steel using amount suitably increases, and is conducive to the pressurized of member, the function of tension part is given full play to, and reaches higher cost performance.When the thickness of top flange steel plate is greater than the thickness of bottom flange steel plate, it is common i beam, and top flange steel plate bears pressure; When the thickness of top flange steel plate is less than the thickness of bottom flange steel plate, it is semi girder, and bottom flange steel plate bears pressure.
As preferably, described top flange steel plate, bottom flange steel plate are arch along Wavelike steel webplate wavelength direction.Top flange steel plate, bottom flange steel plate are arch, are conducive to member stress, offset the downwarp of carrying situation lower member, improve the overall construction intensity of i beam.
As preferably, in described top flange steel plate and bottom flange steel plate, pressurized zone concreting.
The utility model is owing to having adopted above technical scheme, there is significant technique effect: the utility model adopts corrugated sheet steel as the web of i beam, there is structure light, steel using amount is economized, the advantage that anti-seismic performance is good, the cross section rigidity of beam body and the intensity of link are high, the waveform of web passes through straightway, changeover portion, arc section three parts form, wherein changeover portion can effectively connect straightway and arc section, when solving straightway and being directly connected with arc section, the concentrated problem of stress and employing concrete combined structure are as pressure-bearing framework, load performance is good, cost performance is high.Especially pressure-bearing position adopts the steel concrete combining structure with miniature strain wave, has solved the problem of the stresses re-distribution in combining structure, makes combining structure Steel concrete cooperative bearing, has good structural performance and economy.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment 1.
Fig. 2 is the middle waveform steel web structure schematic diagram of Fig. 1.
Fig. 3 is the I portion enlarged drawing of Fig. 2.
Fig. 4 is the left view of Fig. 1.
Fig. 5 is the structural representation with miniature strain wave.
Fig. 6 is the front view of Fig. 5.
The toponym that in above accompanying drawing, each number designation refers to is as follows: wherein 1-top flange steel plate, 2-Wavelike steel webplate, 3-bottom flange steel plate, 5-steel strand cable, 7-concrete, 11-miniature strain wave, 21-circular arc-shaped corner, 22-changeover portion, 23-straightway.
The specific embodiment
Below in conjunction with accompanying drawing 1 to Fig. 6 and embodiment, the utility model is described in further detail:
The continuous i beam of Wavelike steel webplate steel-concrete combined structure, as shown in Figures 1 to 6, comprise a Wavelike steel webplate 2, top flange steel plate 1 and concrete combined structure 7, bottom flange steel plate 3, described Wavelike steel webplate 2 is arranged between top flange steel plate 1 and bottom flange steel plate 3, top flange steel plate 1 and Wavelike steel webplate 2 are by being welded to connect, Wavelike steel webplate 2 and bottom flange steel plate 3 are by being welded to connect, top flange steel plate 1, steel plate 3 surface roughnesses in bottom flange are 70-350 μ m, between single girder construction by one or more be connected in link or steel strand cable 5, form beam structure, the frange plate in pressure-bearing region and Combined concrete form combining structure.When common beam, the frange plate in pressure-bearing region is top flange steel plate 1, and on top flange steel plate 1, concreting 7.Top flange steel plate 1, bottom flange steel plate 3 surface roughnesses are 250 μ m.High roughness can obviously increase the adhesive power of coating.Wavelike steel webplate 2 surface roughnesses are 50-1000 μ m.Wavelike steel webplate surface roughness is respectively 50 μ m, 80 μ m, 120 μ m, 160 μ m, 210 μ m, 310 μ m, 380 μ m, 420 μ m, 600 μ m, 820 μ m, 950 μ m, different roughness, different bonding strengths can be provided, roughness is larger, and Wavelike steel webplate 1 is stronger with the adhesion of concrete or coating.The thickness of Wavelike steel webplate is 2-100mm.The thickness of Wavelike steel webplate can be any one in 8mm, 13mm, 18mm, 23mm, 34mm, 41mm, 45mm, 50mm, 62mm, 76.1mm, 82.9mm, 96mm.
Top flange steel plate is with the miniature strain wave 11 of evagination crest.The wave height of miniature strain wave 11 is 3-20 times of top flange steel plate thickness, and the wave crest length of evagination part is 250mm, and the distance between crest and crest is 1200mm.The wave height of miniature strain wave adopts 10 times of frange plate thickness, the anti-pressure ability weakening because of the existence of miniature strain wave in the time of making edge of a wing steel plate pressurized, the concrete section that 10 times of frange plate thickness that increase by evagination increase makes up, make longitudinal contraction that frange plate can accept concrete and creep, again in longitudinal contraction and the process of creeping and keep overall construction intensity after process.
Common straight flat frange plate does not longitudinally have rigidity, and when concrete shrinks when creeping, steel plate longitudinally can shrink hardly and creep.Like this, just can cause concrete shrinking when creeping, there is shelling phenomenon in straight frange plate and concrete, and particularly serious is the stresses re-distribution problem that causes that steel work takes the lead in stressed, affect the stability of structure, makes structural strength reduction.
Link is for being welded to connect, and being welded to connect of link adopts first freely-supported, rear continuous connected mode, and the continuous structure that forms, car and greatly under load action or the phenomenon that drops of the beam body under geological process can effectively prevent from overloading.
The thickness of top flange steel plate 1 is greater than or less than the thickness of bottom flange steel plate 3.Because considering flexing in pressure zone, flexing need not be considered in tensile region, so traditional tensile region is identical with the steel using amount of pressure zone or section area, make tensile region part have the function phenomenon of having more than needed, it is science and uneconomic not, pressure zone steel using amount suitably increases, and is conducive to the pressurized of member, the function of tension part is given full play to, and reaches higher cost performance.When the thickness of top flange steel plate 1 is greater than the thickness of bottom flange steel plate 3, it is common i beam, and top flange steel plate 1 bears pressure; When the thickness of top flange steel plate 1 is less than the thickness of bottom flange steel plate 3, it is semi girder, and bottom flange steel plate 2 bears pressure.
Top flange steel plate 1, bottom flange steel plate 3 are arch along Wavelike steel webplate 2 wavelength direction.Top flange steel plate 1, bottom flange steel plate 3 are arch, are conducive to member stress, offset the downwarp of carrying situation lower member, improve the overall construction intensity of i beam.
In top flange steel plate 1 and bottom flange steel plate 2, pressurized zone concreting.
As shown in Figures 1 to 6, the difference of the present embodiment and embodiment 1 is:
Top flange steel plate is with the miniature strain wave 11 of evagination crest.The wave height of miniature strain wave 11 is 3-20 times of top flange steel plate thickness, and the wave crest length of evagination part is 200mm, and the distance between crest and crest is 1500mm.The wave height of miniature strain wave adopts 15 times of frange plate thickness, the anti-pressure ability weakening because of the existence of miniature strain wave in the time of making edge of a wing steel plate pressurized, the concrete section that 15 times of frange plate thickness that increase by evagination increase makes up, make longitudinal contraction that frange plate can accept concrete and creep, again in longitudinal contraction and the process of creeping and keep overall construction intensity after process.
In a word, the foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.
Claims (10)
1. the continuous i beam of Wavelike steel webplate steel-concrete combined structure, comprise a Wavelike steel webplate (2), top flange steel plate (1) and concrete combined structure (7), bottom flange steel plate (3), it is characterized in that: described Wavelike steel webplate (2) is arranged between top flange steel plate (1) and bottom flange steel plate (3), top flange steel plate (1) and Wavelike steel webplate (2) are by being welded to connect, Wavelike steel webplate (2) and bottom flange steel plate (3) are by being welded to connect, between single girder construction by one or more be connected in link or steel strand cable (5), form beam structure, the frange plate in pressure-bearing region and Combined concrete form combining structure, Wavelike steel webplate (2) surface roughness is 50-1000 μ m.
2. the continuous i beam of Wavelike steel webplate steel-concrete combined structure according to claim 1, it is characterized in that: described Wavelike steel webplate (2) is the continuous ladder twists and turns steel plate of band changeover portion (22) and circular arc-shaped corner (21), changeover portion (22) is positioned between straightway (23) and circular arc-shaped corner (21), circular arc-shaped corner (21) radius is r, the radius of changeover portion (22) is R, R is gradual change radius, and R is ∞-r.
3. the continuous i beam of Wavelike steel webplate steel-concrete combined structure according to claim 1, is characterized in that: described Wavelike steel webplate (2) is L along the point of contact wire length of wave height direction
aB, along the point of contact wire length of wavelength direction, be L
bC, L
aB>=L
bC.
4. the continuous i beam of Wavelike steel webplate steel-concrete combined structure according to claim 1, is characterized in that: described top flange steel plate (1) is with the miniature strain wave (11) of evagination crest.
5. the continuous i beam of Wavelike steel webplate steel-concrete combined structure according to claim 4, it is characterized in that: the wave height of described miniature strain wave (11) is 3-20 times of top flange steel plate thickness, the wave crest length of evagination part is less than 300mm, and the distance between crest and crest is for being greater than 1000mm.
6. the continuous i beam of Wavelike steel webplate steel-concrete combined structure according to claim 1, is characterized in that: described link is for being welded to connect.
7. the continuous i beam of Wavelike steel webplate steel-concrete combined structure according to claim 6, is characterized in that: being welded to connect of described link adopts first freely-supported, rear continuous connected mode.
8. the continuous i beam of Wavelike steel webplate steel-concrete combined structure according to claim 5, is characterized in that: the thickness of described top flange steel plate (1) is greater than or less than the thickness of bottom flange steel plate (3).
9. the continuous i beam of Wavelike steel webplate steel-concrete combined structure according to claim 1, is characterized in that: described top flange steel plate (1), bottom flange steel plate (3) are arch along Wavelike steel webplate (2) wavelength direction.
10. the continuous i beam of Wavelike steel webplate steel-concrete combined structure according to claim 1, is characterized in that: in described top flange steel plate (1) and bottom flange steel plate (2), and pressurized zone concreting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320436881.2U CN203487700U (en) | 2013-07-18 | 2013-07-18 | Steel mixed composite structural continuous I beam of corrugated steel web |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320436881.2U CN203487700U (en) | 2013-07-18 | 2013-07-18 | Steel mixed composite structural continuous I beam of corrugated steel web |
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|---|---|
| CN203487700U true CN203487700U (en) | 2014-03-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112726956A (en) * | 2020-12-30 | 2021-04-30 | 深圳市市政设计研究院有限公司 | Prestressed corrugated steel web-concrete composite beam and construction method thereof |
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2013
- 2013-07-18 CN CN201320436881.2U patent/CN203487700U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112726956A (en) * | 2020-12-30 | 2021-04-30 | 深圳市市政设计研究院有限公司 | Prestressed corrugated steel web-concrete composite beam and construction method thereof |
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Granted publication date: 20140319 Termination date: 20180718 |