CN103422617A - Continuous I beam adopting corrugated steel web steel and concrete composite structure - Google Patents
Continuous I beam adopting corrugated steel web steel and concrete composite structure Download PDFInfo
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- CN103422617A CN103422617A CN2013103083548A CN201310308354A CN103422617A CN 103422617 A CN103422617 A CN 103422617A CN 2013103083548 A CN2013103083548 A CN 2013103083548A CN 201310308354 A CN201310308354 A CN 201310308354A CN 103422617 A CN103422617 A CN 103422617A
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Abstract
The invention relates to an I beam, and discloses a continuous I beam adopting a corrugated steel web steel and concrete composite structure. The continuous I beam includes a corrugated steel web, a top flange steel plate, a concrete composite structure and a bottom flange steel plate, wherein the corrugated steel web is arranged between the top flange steel plate and the bottom flange steel plate; the top flange steel plate, the bottom flange steel plate and the corrugated steel web are all connected through welding; the single girder body structure forms a continuous girder structure through the connecting end or steel nooses or the combined connection of the connecting end and the steel nooses; flange plates in a pressure-bearing zone are combined with concrete to form a concrete composite structure. The continuous I beam has the advantages of light structure, saving of steel consumption and excellent anti-seismic property; the corrugated steel web in the continuous I beam realizes the smooth transition of a straight line section and an arc section through three transitional sections at corners, solves the problem of stress concentration at corners; particularly, the pressure-bearing part adopts a steel and concrete composite structure with micro strain waves, so that excellent structural performance and economy can be obtained.
Description
Technical field
The present invention relates to i beam, 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 the 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 adopted in existing Wavelike steel webplate i beam, the waveform of its web all is comprised of straightway and arc section, easily produces stress in the coupling part of straightway and arc section and concentrates.Tradition i beam or steel case beam compression flange also adopt steel plate, at pressure zone, adopt steel work can not embody the economy of steel work, as adopt steel-concrete combined structure, the most compressive stress of 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 the stresses re-distribution phenomenon.
Summary of the invention
The present invention is directed in prior art the i beam shear behavior poor, total easily produces stress and concentrates, affect the life-span of structure, using the 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 the stresses re-distribution phenomenon.Provide the intensity of a kind of cross section rigidity of beam body and link high, the waveform of web forms by straightway, changeover portion, arc section three parts, wherein changeover portion can effectively connect straightway and arc section, when solving straightway and directly being connected with arc section, the concentrated problem of stress and employing concrete combined structure are as the 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 the pressure-bearing frange plate, the Wavelike steel webplate steel-concrete combined structure freely-supported i beam of concreting, solved the stresses re-distribution phenomenon that concrete shrinkage and creep causes.
In order to solve the problems of the technologies described above, the present invention 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, the 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, the top flange steel plate, the bottom flange steel surface roughness is 70-350 μ m, 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 zone and Combined concrete form combining structure.The frange plate in pressure-bearing zone is top flange steel plate or bottom flange steel plate, and the frange plate in pressure-bearing zone is mainly the top flange steel plate in common beam, in semi girder, is the bottom flange steel plate.
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 the circular arc-shaped corner radius is r, and the radius of changeover portion is R, and R is the gradual change radius, and R is ∞-r.The changeover portion end that is connected with straightway, radius is that R is that trend is infinitely great; The changeover portion 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 forms by straightway, changeover portion, arc section three parts, wherein changeover portion can effectively connect straightway and circular arc-shaped corner, when the solution straightway directly is connected with arc section, the concentrated problem of stress, be suitable for the 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 vertically substantially without rigidity, with the frange plate of miniature strain wave, rigidity vertically arranged, 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, doubly, the wave crest length of evagination part is less than 300mm to the 3-20 that the wave height of described miniature strain wave is the top flange steel plate thickness, and 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 weakened because of the existence of miniature strain wave in the time of making edge of a wing steel plate pressurized, the 3-20 increased 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 the concrete cooperative bearing, again longitudinal contraction with creep in process and process after keep overall construction intensity.
Because concreting on the pressure-bearing frange plate, concrete exists short-term to shrink and long term creep strain, above-mentioned variation all makes concrete the contraction state of total amount one thousandth left and right occur, and can not work in coordination with contraction with the straight frange plate of the 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 process after keep structural strength, 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 pressure zone need be considered flexing, 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 the tensile region part have the function phenomenon of having more than needed, it is science and uneconomic not, the 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 the 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 the bottom flange steel plate bears pressure.
As preferably, described top flange steel plate, bottom flange steel plate are arch along the 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, the pressurized zone concreting.
The present invention is owing to having adopted above technical scheme, have significant technique effect: the present invention adopts the web of corrugated sheet steel as i beam, there is light in structure, 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 forms by straightway, changeover portion, arc section three parts, wherein changeover portion can effectively connect straightway and arc section, when solving straightway and directly being connected with arc section, the concentrated problem of stress and employing concrete combined structure are as the pressure-bearing framework, load performance is good, and cost performance is high.Especially the pressure-bearing position adopts the steel concrete combining structure with miniature strain wave, has solved the problem of the stresses re-distribution in the combining structure, makes combining structure Steel concrete cooperative bearing, has good structural performance and economy.
The 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 section 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 present invention 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 zone and Combined concrete form combining structure.When common beam, the frange plate in pressure-bearing zone 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.
The top flange steel plate is with the miniature strain wave 11 of evagination crest.Doubly, the wave crest length of evagination part is 250mm to the 3-20 that the wave height of miniature strain wave 11 is the top flange steel plate thickness, 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 weakened 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 vertically have rigidity, and when concrete shrinks when creeping, steel plate vertically can shrink hardly and creep.Like this, just can cause concrete shrinking when creeping, the shelling phenomenon occurs 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 the 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, under can effectively prevent from overloading car and large load action or the phenomenon that drops of the beam body under geological process.
The thickness of top flange steel plate 1 is greater than or less than the thickness of bottom flange steel plate 3.Because pressure zone need be considered flexing, 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 the tensile region part have the function phenomenon of having more than needed, it is science and uneconomic not, the 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, the pressurized zone concreting.
As shown in Figures 1 to 6, the difference of the present embodiment and embodiment 1 is:
The top flange steel plate is with the miniature strain wave 11 of evagination crest.Doubly, the wave crest length of evagination part is 200mm to the 3-20 that the wave height of miniature strain wave 11 is the top flange steel plate thickness, 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 weakened 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 invention, all equalizations of doing 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 (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, top flange steel plate (1), bottom flange steel plate (3) surface roughness is 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 zone and Combined concrete form combining structure.
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 the gradual change radius, and R is ∞-r.
3. 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 LAB along the point of contact wire length of wave height direction, along the point of contact wire length of wavelength direction, is L
BC, L
AB>=L
BC.
4. the continuous i beam of Wavelike steel webplate steel-concrete combined structure according to claim 1, it 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 3-20 that the wave height of described miniature strain wave (11) is the top flange steel plate thickness doubly, 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 work according to claim 1, it is characterized in that: described link is for being welded to connect.
7. the continuous i beam of Wavelike steel webplate steel work 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 work according to claim 5, it 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 work according to claim 1, it 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 the pressurized zone concreting.
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Cited By (7)
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| CN103882805A (en) * | 2014-04-15 | 2014-06-25 | 广州市设计院 | Pedestrian overcrossing with pulling and crushing resistant support structure |
| CN104032667A (en) * | 2014-06-03 | 2014-09-10 | 南京工业大学 | Sandwich structure with composite material as core material and steel plate as skin |
| CN104032893A (en) * | 2014-06-26 | 2014-09-10 | 南京工业大学 | A integrated into one piece's FRP broken line shaped plate structure for composite beam |
| CN104389262A (en) * | 2014-11-13 | 2015-03-04 | 北京东方园林股份有限公司 | Novel wooden trestle structure based on ecological landscape |
| WO2017210950A1 (en) * | 2016-06-08 | 2017-12-14 | 卢国林 | Novel bridge structure utilizing connected-plate truss |
| RU2706982C2 (en) * | 2018-03-14 | 2019-11-21 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный архитектурно-строительный университет" (КазГАСУ) | Composite reinforced concrete beam |
| CN110924589A (en) * | 2019-12-02 | 2020-03-27 | 应急管理部天津消防研究所 | Corrugated web steel-wood composite beam and assembly joint |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103882805A (en) * | 2014-04-15 | 2014-06-25 | 广州市设计院 | Pedestrian overcrossing with pulling and crushing resistant support structure |
| CN104032667A (en) * | 2014-06-03 | 2014-09-10 | 南京工业大学 | Sandwich structure with composite material as core material and steel plate as skin |
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| CN104032893A (en) * | 2014-06-26 | 2014-09-10 | 南京工业大学 | A integrated into one piece's FRP broken line shaped plate structure for composite beam |
| CN104032893B (en) * | 2014-06-26 | 2016-03-23 | 南京工业大学 | A integrated into one piece's FRP broken line shaped plate structure for composite beam |
| CN104389262A (en) * | 2014-11-13 | 2015-03-04 | 北京东方园林股份有限公司 | Novel wooden trestle structure based on ecological landscape |
| WO2017210950A1 (en) * | 2016-06-08 | 2017-12-14 | 卢国林 | Novel bridge structure utilizing connected-plate truss |
| RU2706982C2 (en) * | 2018-03-14 | 2019-11-21 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный архитектурно-строительный университет" (КазГАСУ) | Composite reinforced concrete beam |
| CN110924589A (en) * | 2019-12-02 | 2020-03-27 | 应急管理部天津消防研究所 | Corrugated web steel-wood composite beam and assembly joint |
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Effective date of registration: 20141113 Address after: 311200 Nanyang Economic Development Zone, Xiaoshan District, Zhejiang, Hangzhou Applicant after: Hangzhou Feng Shi color steel Co., Ltd Address before: Hangzhou City, Zhejiang province 311215 Xiaoshan economic and Technological Development Zone, North Building 2 room 1711 Ning'an Applicant before: Hangzhou Boshu Civil Engineering Technology Co., Ltd. |
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Owner name: ZHEJIANG CTB CORRUGATED STEEL WEB CO., LTD. Free format text: FORMER OWNER: HANGZHOU FENGSHI COLOR PLATE CO., LTD. Effective date: 20150227 |
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Effective date of registration: 20150227 Address after: 314422, No. 168-2, village, town, Hangzhou, Xiaoshan District, Zhejiang Applicant after: Zhejiang CTB Corrugated Steel Web Co., Ltd. Address before: 311200 Nanyang Economic Development Zone, Xiaoshan District, Zhejiang, Hangzhou Applicant before: Hangzhou Feng Shi color steel Co., Ltd |
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