CN103526689B - Wavelike steel webplate steel-concrete combined structure simple supported box beam - Google Patents
Wavelike steel webplate steel-concrete combined structure simple supported box beam Download PDFInfo
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- CN103526689B CN103526689B CN201310307116.5A CN201310307116A CN103526689B CN 103526689 B CN103526689 B CN 103526689B CN 201310307116 A CN201310307116 A CN 201310307116A CN 103526689 B CN103526689 B CN 103526689B
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Abstract
The present invention relates to case beam, disclose a kind of Wavelike steel webplate steel-concrete combined structure simple supported box beam, comprise two pieces and above Wavelike steel webplate, top steel plate, concrete, bottom steel plate and end socket end plate, described Wavelike steel webplate is arranged between top steel plate and bottom steel plate, top steel plate, bottom steel plate and Wavelike steel webplate are all by being welded to connect, and top steel plate or bottom steel plate and Combined concrete form concrete combined structure.The present invention is by arranging end socket end plate, improve the cross section rigidity of beam body and the intensity of link, Wavelike steel webplate of the present invention is by the setting of corner three changeover portions, the smooth and easy transition of straightway and arc section can be realized, solve the problem of stress concentration of corner, disjunctor and the discontinuous structure beam body that can effectively prevent from overloading under car and large load action or under geological process is adopted to drop phenomenon, especially pressure-bearing position adopts the steel concrete combining structure with miniature strain wave, has good structural performance and economy.
Description
Technical field
The present invention relates to case beam, particularly relate to a kind of Wavelike steel webplate steel-concrete combined structure simple supported box beam.
Background technology
At present, traditional i beam or steel box-girder are according to the requirement of shearing resistance flexing, and the ratio of height to thickness of web is generally at about 100:1, and trapezoidal waveform steel web is due to extremely strong shearing resistance and anti-flexural property, and its ratio of height to thickness can 300:1 greatly.The Wavelike steel webplate adopted in existing box girder with corrugated steel webs, the waveform of its web is all made up of straightway and arc section, easily produces stress concentrate in the coupling part of straightway and arc section.Tradition i beam or steel box-girder compression flange also adopt steel plate, adopt steel work can not embody the economy of steel work in pressure zone, as adopted steel-concrete combined structure, the most compressive stress in pressure zone is born by concrete, although can economy be embodied, but concrete shrinkage and creep characteristic makes itself and steel work can not cooperative bearing, cause stresses re-distribution phenomenon.
Summary of the invention
The present invention is directed to the shearing resistance of common case beam and anti-flexural property in prior art poor, and the corrugated sheet steel of box girder with corrugated steel webs easily produce stress concentrate, the shortcoming such as cause the application life of case beam short, especially in combining structure, concrete shrinkage and creep characteristic makes itself and steel work can not cooperative bearing, causes stresses re-distribution phenomenon.Provide a kind of by arranging end socket end plate, improve the cross section rigidity of beam body and the intensity of link, the waveform of web is by straightway, changeover portion, arc section three part composition, wherein changeover portion can effectively connect straightway and arc section, solve the problem that when straightway is directly connected with arc section, stress is concentrated, adopt steel performance with miniature strain wave as bearing structure simultaneously, there is the advantage that cost performance is high, form Wavelike steel webplate steel-concrete combined structure simple supported box beam.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
Wavelike steel webplate steel-concrete combined structure simple supported box beam, comprise two pieces and above Wavelike steel webplate, top steel plate, concrete, bottom steel plate and end socket end plate, described Wavelike steel webplate is arranged between top steel plate and bottom steel plate, top steel plate and Wavelike steel webplate by being welded to connect, Wavelike steel webplate and bottom steel plate be by being welded to connect, top steel plate, bottom steel surface roughness are 70-350 μm, and top steel plate or bottom steel plate and Combined concrete form concrete combined structure.
As preferably, described top steel plate, bottom steel surface roughness are 70-350 μm.
As preferably, described Wavelike steel webplate is the continuous ladder twists and turns steel plate of band 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, R is gradual change radius, and R is ∞-r.
As preferably, described Wavelike steel webplate is L along the point of contact wire length in wave height direction
aB, the point of contact wire length along wavelength direction is L
bC, L
aB>=L
bC.
As preferably, described end socket end plate and Wavelike steel webplate, top steel plate, bottom Plate Welding.
As preferably, described top steel plate is with the miniature strain wave of evagination crest.Traditional corrugated sheet steel is longitudinally substantially without rigidity, and the top steel plate longitudinal direction with miniature strain wave has rigidity, energy pressure-bearing, and the longitudinal rigidity of its miniature strain wave part weakens part obtains reinforcement because of the cross section of concrete evagination.
As preferably, the wave height of described miniature strain wave be the 3-20 of top steel plate steel plate thickness doubly, the wave crest length of concave portion is less than 300mm, and the distance between crest and crest is for being greater than 1000mm.The wave height of miniature strain wave adopts the 3-20 of top steel plate thickness doubly, the anti-pressure ability weakened because of the existence of miniature strain wave during the steel plate pressurized of top can be made, the concrete section that the 3-20 times of top steel plate thickness increased by evagination is increased makes up, make top steel 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 or top end steel plate, there is short contractive and long term creep strain in concrete, contraction state about above-mentioned change all makes concrete occur total amount one thousandth, and contraction can not be worked in coordination with the straight frange plate of the tradition of Combined concrete, thus cause the actual forced status of combining structure and desirable stress to there is notable difference, the frange plate can not working in coordination with contraction takes the lead in assume responsibility for compressive stress, causes stresses re-distribution phenomenon in combining structure.This patent adopts way steel plate at the bottom of straight frange plate or top being arranged miniature strain wave, make its longitudinal contraction that can accept concrete and creep, holding structure intensity in longitudinal contraction with process of creeping and after process, solves the above-mentioned bottleneck problem of combining structure at one stroke again.
As preferably, one end of simple supported box beam is provided with plug, and the other end is provided with jack, and be connected by plug and jack between adjacent simple supported box beam, plug is provided with barb, and jack is concave.
As preferably, one end of simple supported box beam is provided with plug, and the other end is provided with jack, is connected between adjacent simple supported box beam by plug and jack, and plug is cylinder, and jack is coordinate hollow cannula with plug.
As preferably, the thickness of described top steel plate is greater than or less than the thickness of bottom steel plate.
As preferably, described top steel plate, bottom steel plate are arch along Wavelike steel webplate wavelength direction.
The present invention is owing to have employed above technical scheme, there is significant technique effect: the present invention is by arranging end socket end plate, improve the cross section rigidity of beam body and the intensity of link, the waveform of web is by straightway, changeover portion, arc section three part composition, wherein changeover portion can effectively connect straightway and circular arc-shaped corner, solve the straightway problem that stress is concentrated when being directly connected with arc section, adopt disjunctor and discontinuous structure can effectively prevent from overloading car and the beam body greatly under load action or under geological process to drop phenomenon.Especially pressure-bearing position adopts the steel concrete combining structure with miniature strain wave, solves the problem of the stresses re-distribution in combining structure, makes combining structure Steel concrete cooperative bearing, have good structural performance and economy.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 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 connection diagram between adjacent simply supported beam.
Fig. 6 is II portion enlarged drawing in Fig. 5.
Fig. 7 is III portion enlarged drawing in Fig. 5.
Fig. 8 is the structural representation being with miniature strain wave.
Fig. 9 is the front view of Fig. 8.
The toponym that in above accompanying drawing, each number designation refers to is as follows: wherein 1-top steel plate, 2-Wavelike steel webplate, 3-bottom steel plate, 4-end socket end plate, 7-concrete, 11-miniature strain wave, 21-circular arc-shaped corner, 22-changeover portion, 23-straightway, 24-plug, 25-jack.
Detailed description of the invention
The present invention is described in further detail with embodiment below in conjunction with accompanying drawing 1 to Fig. 9:
Embodiment 1
Wavelike steel webplate steel-concrete combined structure simple supported box beam, Fig. 1 to Fig. 7,8,9 comprises two pieces and above Wavelike steel webplate 2, top steel plate 1, concrete seven, bottom steel plate 3 and end socket end plate 4, it is characterized in that: described Wavelike steel webplate 2 is arranged between top steel plate 1 and bottom steel plate 3, top steel plate 1 and Wavelike steel webplate 2 by being welded to connect, Wavelike steel webplate 2 with bottom steel plate 3 by being welded to connect, top steel plate 1, bottom steel plate 3 surface roughness are 70-350 μm.Top steel plate 1 or bottom steel plate 3 are combined to form concrete combined structure with concrete seven.When simple supported box beam is common beam, top steel plate 1 mainly bears pressure, and now top steel plate 1 and concrete seven are combined to form concrete combined structure; When simple supported box beam is semi girder, bottom steel plate 3 mainly bears pressure, and now bottom steel plate 3 is combined to form concrete combined structure with concrete seven.Top steel plate 1, bottom steel plate 3 surface roughness are 250 μm.Increase top steel plate 1, bottom steel plate 3 surface roughness, high roughness obviously can increase the adhesive power of coating.
Wavelike steel webplate 2 is the continuous ladder twists and turns steel plate of band changeover portion 22 and circular arc-shaped corner 21, and changeover portion 22 is between straightway 23 and circular arc-shaped corner 21, and circular arc-shaped corner 21 radius is r, and the radius of changeover portion 22 is R, R is gradual change radius, and R is ∞-r.Changeover portion 22 is connected with straightway 23 one end, and radius is R is that trend is infinitely great; Changeover portion 22 is connected with circular arc-shaped corner 21 one end, and radius is R is that trend equals r, therefore, by straightway 23 to circular arc-shaped corner 21, the radius R of changeover portion 22 equals r for being decreased to gradually from infinity, thus makes straightway 23 and circular arc-shaped corner 21 smooth transition more, reduces stress and concentrates.The waveform of web is by straightway, changeover portion, arc section three part composition, wherein changeover portion can effectively connect straightway and circular arc-shaped corner, solve the straightway problem that stress is concentrated when being directly connected with arc section, be suitable for industrial mass manufacture, mould and manufacturing cost lower.
Wavelike steel webplate 2 is L along the point of contact wire length in wave height direction
aB, the point of contact wire length along wavelength direction is L
bC, L
aB>=L
bC.Wavelike steel webplate 2 to equal or slightly larger than the point of contact wire length along wavelength direction along the point of contact wire length in wave height direction, i.e. L
aB>=L
bCthe design cost performance that makes the shear strength of corrugated sheet steel and steel using amount reach good, if wavelength direction is long, i.e. L
bC>=L
aBthen shear behavior obviously reduces, and wavelength direction is too short, then steel using amount obviously increases.Therefore, L is adopted
aB>=L
bCdesign, can either guarantee shear strength, rolled steel dosage can be reduced again as far as possible.
Top steel plate 1 is with the miniature strain wave 11 of evagination crest.The wave height of miniature strain wave 11 is 3-20 times of top steel plate thickness, and the wave crest length of concave portion is 200mm, and the distance between crest and crest is 1200mm.In the present embodiment, the wave height of miniature strain wave adopts 12 times of top plate thickness, the anti-pressure ability weakened because of the existence of miniature strain wave during the steel plate pressurized of top can be made, the concrete section that the 12 times of top plate thickness increased by evagination are increased makes up, the longitudinal contraction making top steel plate can accept concrete with creep, again in longitudinal contraction with process of creeping and keep overall construction intensity after process.
Common top steel plate adopts the straight flat frange plate steel plate longitudinally having rigidity, and when concrete shrinks with when creeping, steel plate longitudinally shrinks hardly and creeps.Like this, concrete just can be caused shrinking with when creeping, and there is the phenomenon that shells in straight frange plate and concrete, particularly seriously causes the stresses re-distribution problem that steel work takes the lead in stressed, affect the stability of structure, structural strength is reduced.
End socket end plate 4 welds with Wavelike steel webplate 2, top steel plate 1, bottom steel plate 3.By arranging end socket end plate 4, improve the cross section rigidity of beam body and the intensity of link.
One end of simple supported box beam is provided with plug 24, and the other end is provided with jack 25, and be connected by plug 24 and jack 25 between adjacent simple supported box beam, plug 24 is cylinder, and jack 25 is for coordinate hollow cannula with plug 24.Coordinated with jack 25 by plug 24, form disjunctor and discontinuous structure, the beam body under can effectively prevent from overloading car and large load action or under geological process drops phenomenon.
The thickness of top steel plate 1 is greater than the thickness of bottom steel plate 3.Because flexing need be considered in pressure zone, flexing then need not be considered in tensile region, so the steel using amount of traditional tensile region and pressure zone or section area identical, make tensile region part there is function to have more than needed phenomenon, it is not science and uneconomic, pressure zone steel using amount suitably increases, and is conducive to the pressurized of component, the function of tension part gives full play to, reach higher cost performance.When the thickness of top steel plate 1 is greater than the thickness of bottom steel plate 3, it is common I-shaped case beam, and top steel plate 1 bears pressure.
Top steel plate 1, bottom steel plate 3 are arch along Wavelike steel webplate 2 wavelength direction.Top steel plate 1, bottom steel plate 3 are arch, are conducive to member stress, offset the downwarp of carrying situation lower member, improve the overall construction intensity of case beam.
Embodiment 2
As shown in Fig. 1 to Fig. 5,7,8,9, the difference of the present embodiment and embodiment 1 is: one end of simple supported box beam is provided with plug 24, and the other end is provided with jack 25, is connected between adjacent simple supported box beam by plug 24 and jack 25, plug 24 is provided with barb, and jack 25 is concave.The thickness of top steel plate 1 is less than the thickness of bottom steel plate 3.Now, bottom steel plate 3 is as pressure-bearing surface, and its main form of structure is cantilever boxgirder.
Top steel plate 1 is with the miniature strain wave 11 of evagination crest.The wave height of miniature strain wave 11 is 3-20 times of top steel plate thickness, and the wave crest length of concave portion is 250mm, and the distance between crest and crest is 1500mm.In the present embodiment, the wave height of miniature strain wave adopts 10 times of top plate thickness, the anti-pressure ability weakened because of the existence of miniature strain wave during the steel plate pressurized of top can be made, the concrete section that the 10 times of top plate thickness increased by evagination are increased makes up, the longitudinal contraction making top steel plate can accept concrete with creep, again in longitudinal contraction with process of creeping and keep overall construction intensity after process.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (6)
1. Wavelike steel webplate steel-concrete combined structure simple supported box beam, comprise two pieces and above Wavelike steel webplate (2), top steel plate (1), concrete (7), bottom steel plate (3) and end socket end plate (4), it is characterized in that: described Wavelike steel webplate (2) is arranged between top steel plate (1) and bottom steel plate (3), top steel plate (1) and Wavelike steel webplate (2) are by being welded to connect, Wavelike steel webplate (2) and bottom steel plate (3) are by being welded to connect, top steel plate (1), bottom steel plate (3) surface roughness is 70-350 μm, top steel plate (1) or bottom steel plate (3) are combined to form concrete combined structure with concrete (7), 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, R is ∞-r, described Wavelike steel webplate (2) is L along the point of contact wire length in wave height direction
aB, the point of contact wire length along wavelength direction is L
bC, L
aB>=L
bCdescribed top steel plate (1) is with the miniature strain wave (11) of evagination crest, the wave height of described miniature strain wave (11) is 3-20 times of top steel plate (1) steel plate thickness, the wave crest length of concave portion is less than 300mm, and the distance between crest and crest is for being greater than 1000mm.
2. Wavelike steel webplate steel-concrete combined structure simple supported box beam according to claim 1, is characterized in that: described end socket end plate (4) and Wavelike steel webplate (2), top steel plate (1), bottom steel plate (3) are welded to connect.
3. Wavelike steel webplate steel work simple supported box beam according to claim 1, it is characterized in that: one end of simple supported box beam is provided with plug (24), the other end is provided with jack (25), be connected by plug (24) and jack (25) between adjacent simple supported box beam, plug (24) is provided with barb, and jack (25) is concave.
4. Wavelike steel webplate steel work simple supported box beam according to claim 1, it is characterized in that: one end of simple supported box beam is provided with plug (24), the other end is provided with jack (25), be connected by plug (24) and jack (25) between adjacent simple supported box beam, plug (24) is cylinder, and jack (25) is coordinate hollow cannula with plug (24).
5. Wavelike steel webplate steel work simple supported box beam according to claim 1, is characterized in that: the thickness of described top steel plate (1) is greater than or less than the thickness of bottom steel plate (3).
6. Wavelike steel webplate steel work simple supported box beam according to claim 1, is characterized in that: described top steel plate (1), bottom steel plate (3) are arch along Wavelike steel webplate (2) wavelength direction.
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| CN109653376A (en) * | 2019-01-31 | 2019-04-19 | 重庆大学 | A kind of high-performance is greatly across heavily loaded multistory industrial buildings fabricated construction system |
| CN112482661A (en) * | 2020-11-05 | 2021-03-12 | 江南大学 | Corrugated steel-concrete composite beam wrapped outside wave, and construction method and application thereof |
| CN116183144B (en) * | 2022-12-21 | 2023-10-24 | 广西北投公路建设投资集团有限公司 | Method for monitoring health state of corrugated steel web bridge |
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| JP2006257634A (en) * | 2005-03-15 | 2006-09-28 | Ps Mitsubishi Construction Co Ltd | Corrugated-steel-plate web girder |
| CN101012636A (en) * | 2007-02-15 | 2007-08-08 | 四川省交通厅公路规划勘察设计研究院 | Steel concrete combined bridge front panel |
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