CN113062217A - Super-high-toughness combined bridge deck for assembly connection of angle steel and profiled steel sheet - Google Patents
Super-high-toughness combined bridge deck for assembly connection of angle steel and profiled steel sheet Download PDFInfo
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- CN113062217A CN113062217A CN202110198437.0A CN202110198437A CN113062217A CN 113062217 A CN113062217 A CN 113062217A CN 202110198437 A CN202110198437 A CN 202110198437A CN 113062217 A CN113062217 A CN 113062217A
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- steel
- bridge deck
- angle
- profiled
- steel sheet
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
Abstract
The invention discloses an ultrahigh-toughness combined bridge deck with angle steel and profiled steel plates in assembly connection, which consists of profiled steel plates, angle steel, round steel rods, high-strength bolts and ultrahigh-toughness concrete. Bolt holes are formed in the upper flange of the profiled steel sheet and the long limb of the angle steel at equal intervals, round holes are formed in the short limb of the angle steel at equal intervals, and the high-strength bolt penetrates through the bolt holes to be connected with the profiled steel sheet and the angle steel and then penetrates through the round holes to form the bridge floor 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 invention, the bridge deck steel skeleton is prefabricated in advance by a factory, the prefabrication and assembly degree is high, and the fatigue performance of the structure is improved while the construction complexity and the material cost are reduced. 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, and improves the toughness and durability of the structure.
Description
Technical Field
The invention relates to the technical field of structural engineering, in particular to an ultrahigh-toughness combined bridge deck for assembly and connection of angle steel and profiled steel plates.
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.
Disclosure of Invention
In order to solve the problems of a traditional steel-concrete combined bridge deck slab system, the invention provides an ultrahigh-toughness combined bridge deck slab with assembled and connected angle steel and profiled steel plates.
The utility model provides an angle steel and profiled sheet assembled joint's super high tenacity combination decking, includes:
profiled steel sheets;
angle steel fixedly installed on the top surface (i.e., upper flange) of the profiled steel sheet;
round steel rods are arranged on the angle steels in a penetrating way;
and concrete poured on a bridge deck steel framework consisting of the profiled steel plates, the angle steels and the round steel rods.
Bolt holes are formed in the upper flange of the profiled steel sheet and the long limb of the angle steel at equal intervals, round holes are formed in the short limb of the angle steel at equal intervals, and the high-strength bolt penetrates through the bolt holes to be connected with the profiled steel sheet and the angle steel, and then the round steel bar penetrates through the round holes to form the bridge floor steel framework.
The following are preferred technical schemes of the invention:
the profiled steel sheet is a profiled steel sheet with a wave-shaped section formed along the sheet width direction, the top of the wave-shaped section is a plane and serves as a top surface (namely an upper flange), and the bottom of the wave-shaped section is a plane and serves as a bottom surface (namely a lower flange).
The length direction of the angle steel is vertical to the wave-shaped section of the profiled steel sheet.
The angle steel include two right-angle sides, for long limb (the great right-angle side of width) and short limb (the less right-angle side of width), the long limb of angle steel pass through the bolt fastening in the top surface of profiled sheet.
Bolt holes are formed in the long limbs of the angle steel and the top surface of the profiled steel plate, and the bolts penetrate through the bolt holes to be matched and fixed with nuts. The bolt holes are arranged on the long limbs of the angle steel and the top surface of the profiled steel sheet at equal intervals.
The short limbs of the angle steel are provided with round holes, and the round steel rods penetrate through the round holes in the angle steel to form a bridge deck steel framework. The length direction of the round steel bar is vertical to the plane of the short limb of the profiled steel sheet.
The round holes are arranged on the short limbs of the angle steel at equal intervals.
The top surface of the concrete is higher than the top of the angle steel.
In the ultrahigh-toughness combined bridge deck slab assembled and connected with the angle steel and the profiled steel plates, bolt holes are formed in the upper flange of the profiled steel plate and the long limb of the angle steel at equal intervals, round holes with the diameter slightly larger than that of a round steel bar are formed in the short limb of the angle steel at equal intervals, high-strength bolts penetrate through the bolt holes to be connected with the profiled steel plates and the angle steel, and the round steel bar penetrates through the round holes to form a bridge deck steel skeleton.
In the ultrahigh-toughness combined bridge deck slab formed by the angle steel and the profiled steel sheet in an assembling connection mode, ultrahigh-toughness concrete is poured on a bridge deck steel skeleton and is slightly higher than short limbs and tips of the angle steel, and the bridge deck steel skeleton is protected.
In the ultrahigh-toughness combined bridge deck slab assembled and connected with the angle steel and the profiled steel plates, the round steel bars and the steel plates between holes of the short limbs of the angle steel jointly play roles of shear connection and pulling resistance so as to ensure the interface connection performance between the profiled steel plates and the ultrahigh-toughness concrete.
The ultra-high toughness concrete adopted by the invention 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:
further preferably, the ultra-high toughness concrete adopts the following raw materials by weight percent:
the ultrahigh-toughness combined bridge deck slab with the angle steels assembled and connected with the profiled steel plates is formed by connecting the profiled steel plates with the angle steels through high-strength bolts, and forming a bridge deck steel skeleton after a round steel bar transversely penetrates through a reserved round hole of a short limb of the angle steel along a bridge deck, and the ultrahigh-toughness concrete is cast in situ, 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 ultra-high toughness combined bridge deck plate assembled and connected by the angle steel and the profiled steel plate is only slightly higher than that of the short limb tip of the angle steel, and the ultra-high toughness combined bridge deck plate can play a role in effectively blocking steel from the external environment and preventing the steel from being rusted, so that the toughness, the corrosion resistance and the durability of the combined bridge deck plate are obviously improved.
2) Interface connection performance is superior, can effectively avoid the problem that labour loss and construction precision that field weld brought are difficult to the guarantee, and the bridge deck steel structure part does not have the welding seam and makes structural fatigue performance obtain showing and promoting, has also 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.
The round steel rods and the steel plates between the holes of the angle steel can effectively ensure the shear connection effect between the profiled steel plates and the ultra-high-toughness concrete, simultaneously play a role of pulling resistance together, prevent the interface of the profiled steel plates from being separated, and do not need to adopt 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 addition, the ultra-high toughness concrete on two side surfaces of the short limb of the angle steel can play a role in shearing resistance, which is different from the role of other connecting pieces only on one side of the steel plate. 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 ultrahigh-toughness combined bridge deck slab assembled and connected by the angle steel and the profiled steel sheet has the advantages that the bridge deck steel skeleton is prefabricated in advance by a factory, the prefabricated assembly degree is high, and the construction is convenient and rapid. All component parameters such as 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 round steel bar can be conveniently changed and adjusted according to design and construction requirements. The system has the characteristic of high prefabrication and assembly, is matched with the call of a national vigorously developed assembly structure system, and has very wide development prospect.
4) In the invention, the ultra-high toughness concrete is poured on the bridge deck steel framework to play a role in protecting the bridge deck steel framework. According to the invention, the bridge deck steel skeleton is prefabricated in advance by a factory, the prefabrication and assembly degree is high, and no additional welding stiffening rib, transverse steel bar and stud is needed, so that the construction complexity and the material cost are reduced, and the fatigue performance of the structure is improved. 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, 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 sectional view of the ultra-high toughness combined bridge deck assembled and connected by angle steel and profiled steel sheets;
FIG. 5 is a longitudinal sectional view of the ultra-high toughness combined bridge deck assembled and connected by angle steel and 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 includes the following components: profiled steel plate 1, angle steel 2, round steel bar 3, bolt hole 4, high-strength bolt 5, and ultra-high toughness concrete 6. The construction method is that bolt holes 4 are formed in the upper flange (namely the top surface) of the profiled steel sheet 1 and the long limb (the side with larger width) of the angle steel 2 at equal intervals, round holes with the diameter slightly larger than the round steel bar 3 are formed in the short limb (the side with smaller width) of the angle steel 2 at equal intervals, the high-strength bolt 5 penetrates through the bolt holes 4 to be connected with the profiled steel sheet 1 and the angle steel 2, and the round steel bar 3 penetrates through the round holes.
As shown in figures 4-5, the ultra-high toughness concrete 6 is poured on the bridge deck steel skeleton, and the height of the ultra-high toughness concrete is slightly higher than the short limb tip of the angle steel 2, so that the function of protecting the bridge deck steel skeleton is achieved.
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 (10)
1. The utility model provides an angle steel and profiled sheet assembled connection's super high tenacity combination decking which characterized in that includes:
profiled steel sheets;
angle steel fixedly installed on the top surface of the profiled steel sheet;
round steel rods are arranged on the angle steels in a penetrating way;
and concrete poured on a bridge deck steel framework consisting of the profiled steel plates, the angle steels and the round steel rods.
2. The ultra-high toughness composite bridge deck slab assembled and connected by angle iron and profiled steel sheet as claimed in claim 1, wherein the profiled steel sheet is a formed steel sheet having a wave-shaped section formed along the width direction of the slab, the top of the wave-shaped section is a plane, and the bottom of the wave-shaped section is a plane.
3. The ultra-high toughness composite bridge deck slab assembled and connected by angle steel and profiled steel sheet according to claim 1, wherein the length direction of the angle steel is perpendicular to the wave-shaped section of the profiled steel sheet.
4. The ultra-high toughness composite bridge deck slab assembled and connected by angle iron and profiled steel sheet as claimed in claim 1, wherein said angle iron comprises two right-angled sides, being long leg and short leg, the long leg of said angle iron is fixed on the top surface of said profiled steel sheet by means of bolt.
5. The ultra-high toughness composite bridge deck slab assembled and connected by angle steel and profiled steel sheet as claimed in claim 4, wherein bolt holes are arranged on the long limb of the angle steel and the top surface of the profiled steel sheet, and the bolts pass through the bolt holes and are fixed with nuts.
6. The ultra-high toughness composite bridge deck slab assembled and connected by angle iron and profiled steel sheet as claimed in claim 5, wherein said bolt holes are provided on the long limb of said angle iron and the top surface of said profiled steel sheet at equal intervals.
7. The ultra-high toughness composite bridge deck slab assembled and connected by angle steels and profiled steel sheets as claimed in claim 1, wherein the short limbs of the angle steels are provided with round holes, and the round steel rods pass through the round holes on each angle steel to form a bridge deck steel skeleton.
8. The ultra-high toughness composite bridge deck slab assembled and connected by angle steel and profiled steel sheet as claimed in claim 7, wherein the length direction of said round steel bar is perpendicular to the plane of the short limb of said profiled steel sheet.
9. The ultra-high toughness composite bridge deck slab assembled and connected by angle steel and profiled steel sheet as claimed in claim 7, wherein said round holes are arranged on the short limb of said angle steel at equal intervals.
10. The ultra-high toughness composite bridge deck slab assembled and connected by angle steels and profiled steel sheets as claimed in claim 1, wherein the top surface of the concrete is higher than the top of the angle steels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110198437.0A CN113062217A (en) | 2021-02-22 | 2021-02-22 | Super-high-toughness combined bridge deck for assembly connection of angle steel and profiled steel sheet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110198437.0A CN113062217A (en) | 2021-02-22 | 2021-02-22 | Super-high-toughness combined bridge deck for assembly connection of angle steel and profiled steel sheet |
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| CN112227200A (en) * | 2020-09-22 | 2021-01-15 | 浙江大学 | Non-stud toughness combined bridge deck system |
| CN112227199A (en) * | 2020-09-22 | 2021-01-15 | 浙江大学 | Toughness combined bridge deck plate composed of cold-bending Z-shaped steel |
| CN212452291U (en) * | 2020-05-09 | 2021-02-02 | 西南交通大学 | Vibration and noise reduction type bridge deck |
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2021
- 2021-02-22 CN CN202110198437.0A patent/CN113062217A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150139719A1 (en) * | 2011-09-22 | 2015-05-21 | Jiangsu Transportation Research Institute Co., Ltd | Shear connector for corrugated sheet steel and concrete |
| CN102733537A (en) * | 2012-07-06 | 2012-10-17 | 杭州固华复合材料科技有限公司 | Sandwich insulating wall body based on ultrahigh-toughness cement-based composite material and wall boards |
| CN104674657A (en) * | 2014-12-03 | 2015-06-03 | 华东交通大学 | Profiled steel sheet-UHP (ultra high performance) fiber reinforced concrete composite bridge deck |
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| CN112227199A (en) * | 2020-09-22 | 2021-01-15 | 浙江大学 | Toughness combined bridge deck plate composed of cold-bending Z-shaped steel |
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Application publication date: 20210702 |