CN215405593U - Profiled steel sheet high-toughness combined bridge floor - Google Patents
Profiled steel sheet high-toughness combined bridge floor Download PDFInfo
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- CN215405593U CN215405593U CN202120393027.7U CN202120393027U CN215405593U CN 215405593 U CN215405593 U CN 215405593U CN 202120393027 U CN202120393027 U CN 202120393027U CN 215405593 U CN215405593 U CN 215405593U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 119
- 239000010959 steel Substances 0.000 title claims abstract description 119
- 239000004567 concrete Substances 0.000 claims abstract description 47
- 239000002131 composite material Substances 0.000 claims description 11
- 238000010276 construction Methods 0.000 abstract description 15
- 230000003014 reinforcing effect Effects 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 4
- 230000002457 bidirectional effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000011161 development Methods 0.000 description 3
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- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000011056 performance test Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a profiled steel sheet high-toughness combined bridge floor which comprises a profiled steel sheet, a round steel bar and ultrahigh-toughness concrete. And (3) forming round holes on the rib web of the profiled steel sheet at equal intervals, and enabling the round steel rods to transversely penetrate through the round holes to form the bridge deck steel skeleton. The ultra-high toughness concrete is poured on the bridge deck steel skeleton to play a role in protecting the bridge deck steel skeleton. According to the utility model, the corrugated shape and the mechanical property of the profiled steel sheet make the profiled steel sheet do not need to be additionally welded with longitudinal and transverse stiffening ribs, so that the fatigue performance of the structure is greatly improved while the construction complexity is reduced; the round steel bars improve the transverse bending capability of the combined bridge deck slab, the stress mode is changed from unidirectional stress to bidirectional stress, and the round steel bars and the steel plates between the holes play roles of shear connection and pulling resistance at the same time; the ultra-high toughness concrete can ensure that no or only micro cracks below 100 microns are generated, effectively avoids the use requirement of a reinforcing mesh, has small using amount, and improves the toughness and durability of the structure.
Description
Technical Field
The utility model relates to the technical field of structural engineering, in particular to a profiled steel sheet high-toughness combined bridge floor.
Background
With the continuous promotion of the infrastructure construction process of China, people realize that the convenience degree of urban internal traffic and urban inter-traffic greatly influences the national economic development and social progress; therefore, the country has realized the big development of road, bridge engineering in recent decades. The bridge structure is not only widely applied to urban overpasses, subway light rails, high-speed railways and the like, but also widely applied to river-crossing and sea-crossing structures. In recent years, with the construction of ultra-large bridge projects such as the mao bridge in hong kong zhu and the mao bridge in hangzhou bay, bridge structures at home and abroad face unprecedented opportunities for development. In the construction of bridge structures, the bridge deck plate not only plays a role in bearing loads such as the dead weight of an upper structure and passing vehicles, but also faces long-term effects such as wheel friction, driving vibration, water and ion erosion, and the like, so that higher requirements are put forward on the bearing capacity, durability and toughness of the bridge deck plate.
The reinforced concrete bridge deck is widely applied in actual engineering, but cannot be applied to bridge structures with large span due to the fact that the self weight of concrete is large and the tensile property of concrete materials is poor. In order to solve the problem, orthotropic steel bridge deck slabs are produced at the same time; the orthotropic bridge deck system formed by arranging longitudinal and transverse stiffening ribs outside the steel bridge deck can obviously improve the bearing efficiency of the bridge deck and the economic span of the structure; however, considering that steel materials are easy to rust when exposed to air for a long time, the durability of the orthotropic bridge deck becomes a problem to be solved urgently in engineering.
In order to solve the problems, a combined bridge deck system is formed by combining steel and concrete materials in engineering, so that the tensile property of the steel and the compressive property of the concrete are fully exerted, and the bearing performance of the structure is further improved. However, the existing steel-concrete composite bridge deck still has some problems: firstly, in order to ensure sufficient shear connection between steel and concrete and prevent the separation of the interface between the steel and the concrete, more studs (playing the double roles of shear resistance and pulling resistance) are usually arranged between the steel and the concrete, so that the construction workload is greatly increased, and the fatigue performance of the structure is influenced due to the existence of welding seams; secondly, the steel deck sections in the composite deck slab usually require a plurality of stiffening ribs to be welded out of plane, which also increases the amount of construction and affects the fatigue performance of the structure; thirdly, the common concrete material is easy to crack after being tensioned and sensitive to local defects, cracks are easy to generate under the action of long-term load, water and ions are corroded, the corrosion resistance and durability of the bridge deck are influenced, the maintenance cost of the bridge structure is obviously increased, and huge waste is caused to manpower and material resources; fourthly, the steel structure parts in the existing combined bridge deck system are usually welded and connected on the construction site, the site workload is large, and the construction quality and precision are difficult to guarantee.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems of the traditional steel-concrete combined bridge deck slab system, the utility model provides a profiled steel sheet high-toughness combined bridge deck.
A profiled steel sheet high-toughness composite bridge floor comprises:
profiled steel sheets;
the through hole penetrates through the profiled steel sheet along the width direction of the profiled steel sheet;
the round steel rod penetrates through the through hole;
and concrete (particularly ultra-high-toughness concrete) poured on the profiled steel sheet and the round steel bars.
In the profiled steel sheet high-toughness combined bridge floor, the profiled steel sheet is a formed steel sheet with a wave-shaped section formed along the width direction of the profiled steel sheet.
In the profiled steel sheet high tenacity combination bridge floor, the web of profiled steel sheet rib equidistantly offers the diameter and slightly is greater than the round steel stick's round hole, the through-hole be the round hole, the diameter of round hole slightly be greater than the diameter of round steel stick, the diameter of round hole be the diameter 1.05 ~ 1.3 times of round steel stick. And (4) penetrating the round steel rod through the round hole to form the bridge deck steel framework. The steel bars are inserted into the through holes at equal intervals, and the profiled steel plates and the steel bars form a bridge deck steel framework.
In the profiled steel sheet high-toughness combined bridge floor, the ultra-high-toughness concrete is poured on a bridge floor steel framework, the thickness of the ultra-high-toughness concrete is slightly higher than the height of the upper flange of a profiled steel sheet rib, and the effect of protecting the bridge floor steel framework is achieved. The top surface of the concrete is higher than the top surface of the profiled steel sheet.
In the profiled steel sheet high-toughness combined bridge deck, the round steel bars play a role in improving the transverse bending capacity of the combined bridge deck slab, and simultaneously play a role in shear connection and pulling resistance together with the steel plates among the holes so as to ensure the interface connection performance between the profiled steel sheets and the ultra-high-toughness concrete.
The ultra-high toughness concrete adopted by the utility model comprises cement, an active mineral admixture, aggregate, reinforcing fiber and water, wherein the cement and the active mineral admixture are prepared from the following raw materials in percentage by weight:
the concrete adopts the following raw materials by weight percent:
the profiled steel sheet high-toughness combined bridge floor provided by the utility model forms a bridge floor steel framework by enabling round steel bars to transversely penetrate through reserved round holes of profiled steel sheet rib webs along the bridge floor, and cast-in-situ ultrahigh-toughness concrete, and has the following advantages:
1) the adopted ultra-high-toughness concrete has superior performance and less consumption, can effectively avoid the use requirement of a reinforcing mesh, can reduce the complexity of construction while reducing the material cost, and shortens the construction period, and the concrete description is as follows:
the ultra-high toughness concrete has high bearing capacity under compression, shows strain hardening characteristics under tension, can stably reach more than 3 percent under ultimate tensile strain, and only has a plurality of micro cracks with the width of less than 100 micrometers, which are densely distributed under the ultimate tensile strain. In the traditional steel-concrete composite bridge deck, the crack resistance of the concrete layer is generally improved by increasing the thickness of the concrete layer and densely distributing reinforcing meshes. The thickness of the ultra-high-toughness concrete layer of the profiled steel plate high-toughness combined bridge deck provided by the utility model is only slightly higher than the upper flange of the profiled steel plate rib, so that the effects of effectively blocking steel and the external environment and preventing the steel from being rusted can be achieved, and the toughness, the corrosion resistance and the durability of the combined bridge deck are obviously improved.
2) Can effectively avoid the problem that labour loss and construction precision that field weld brought are difficult to the guarantee, the decking steel construction part does not have any welding seam simultaneously and also makes structural fatigue performance obtain showing and promote, has reduced material cost and construction complexity to a certain extent, and concrete exposition is as follows:
firstly, the corrugated shape of the profiled steel sheet ensures that the combined bridge deck has larger longitudinal section rigidity, torsional rigidity and external stability, and longitudinal and transverse stiffening ribs do not need to be additionally welded on the lower part of a bridge deck top plate together with the traditional reinforced concrete combined bridge deck.
Secondly, the round steel rods and the steel plates between the holes effectively guarantee the shear connection effect between the profiled steel plates and the ultra-high-toughness concrete, simultaneously play a role in resisting pulling, prevent the interface of the profiled steel plates from being separated, and do not need measures such as manual mechanical indentation or bulge manufacturing on the surfaces of the profiled steel plates or extra welding of reinforcing meshes or studs on the flanges of the profiled steel plates and the like to enhance the interface connection performance between the profiled steel plates and the concrete. In the traditional steel-concrete combined bridge deck, if the complete shear connection effect of a steel bridge deck and concrete needs to be realized, the number of the studs in each square meter of the bridge deck is different from 20 to 100, and the number of the studs is increased along with the increase of factors such as the thickness of a concrete layer, the strength of the concrete, the external load and the like.
3) The round steel bar penetrates through the ribbed web of the profiled steel sheet along the bridge floor in the transverse direction, so that the rigidity of the combined bridge deck is improved, and the transverse bending capability of the combined bridge deck is improved, so that the combined bridge deck is changed from unidirectional stress to bidirectional stress.
4) The size of the profiled steel sheet, the diameter, the interval, the shape and the like of the round steel bar and the round hole can be flexibly changed, so that the profiled steel sheet can be conveniently changed and adjusted according to design and construction requirements, and the modularization degree of the bridge deck system is obviously improved while the profiled steel sheet is convenient to design and construct.
5) According to the utility model, the corrugated shape and the mechanical property of the profiled steel sheet make the profiled steel sheet do not need to be additionally welded with longitudinal and transverse stiffening ribs, so that the fatigue performance of the structure is greatly improved while the construction complexity is reduced; the round steel bar improves the transverse bending capacity of the combined bridge deck slab, changes the stress mode from unidirectional stress to bidirectional stress, and simultaneously plays roles of shear connection and pulling resistance together with the steel plates among the holes; the ultra-high toughness concrete can ensure that no or only micro cracks below 100 microns are generated, effectively avoids the use requirement of a reinforcing mesh, has small using amount, and improves the toughness and durability of the structure.
Drawings
FIG. 1 is a transverse cross-sectional view of a bridge deck steel skeleton;
FIG. 2 is a longitudinal cross-sectional view of a bridge deck steel skeleton;
FIG. 3 is a schematic view of the entire bridge deck steel skeleton;
FIG. 4 is a transverse section view of a high-toughness combined bridge deck made of profiled steel sheets;
FIG. 5 is a longitudinal section of a high-toughness composite bridge deck made of profiled steel sheets.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the bridge deck steel skeleton is composed of a profiled steel sheet 1 and a round steel bar 2. The construction method is that round holes with the diameter slightly larger than the round steel rods 2 are arranged on webs of plate ribs of the profiled steel sheet 1 at equal intervals, and the round steel rods 2 transversely penetrate through the round holes along the bridge floor.
As shown in figures 4-5, the ultra-high toughness concrete 3 is poured on the bridge deck steel framework, and the thickness of the ultra-high toughness concrete is slightly higher than the height of the upper flange of the plate rib of the profiled steel plate 1, so that the ultra-high toughness concrete can protect the bridge deck steel framework.
The ultra-high toughness concrete comprises the following components of cement, an active mineral admixture, aggregate, fiber and water, wherein the active mineral admixture comprises fly ash, silica fume, granulated blast furnace slag and metakaolin, the maximum particle size of the aggregate is not more than 0.5mm, the fiber adopts one or the combination of more than one of polyvinyl alcohol fiber, polyethylene fiber and aromatic polyamide fiber, the fiber length is 5-25 mm, the diameter is 0.015-0.055 mm, the elastic modulus is 30-150 GPa, the tensile strength is 1000-3500 MPa, the ultimate elongation is 2-15%, and the weight ratio of the cement to the active mineral admixture is as follows:
the performance test of the ultra-high toughness concrete obtained under the mixing proportion shows that the ultimate tensile strain can reach 3.2 percent (about 320 times of the concrete), and the width of a corresponding crack is 0.049mm when the ultimate tensile strain is achieved; the flexural strength was 12.8MPa (about 2 times that of concrete), the uniaxial compressive strength was 48MPa, and the compressive strain corresponding to the peak load was 0.55% (about 2 times that of concrete).
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120393027.7U CN215405593U (en) | 2021-02-22 | 2021-02-22 | Profiled steel sheet high-toughness combined bridge floor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120393027.7U CN215405593U (en) | 2021-02-22 | 2021-02-22 | Profiled steel sheet high-toughness combined bridge floor |
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| Publication Number | Publication Date |
|---|---|
| CN215405593U true CN215405593U (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120393027.7U Active CN215405593U (en) | 2021-02-22 | 2021-02-22 | Profiled steel sheet high-toughness combined bridge floor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921802A (en) * | 2021-02-22 | 2021-06-08 | 山东省交通规划设计院集团有限公司 | Profiled steel sheet-ultra-high toughness concrete combined bridge deck |
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2021
- 2021-02-22 CN CN202120393027.7U patent/CN215405593U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921802A (en) * | 2021-02-22 | 2021-06-08 | 山东省交通规划设计院集团有限公司 | Profiled steel sheet-ultra-high toughness concrete combined bridge deck |
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