CN204703055U - Based on the steel-ultra-high performance concrete combined beam structure of fin-plate type bridge floor - Google Patents
Based on the steel-ultra-high performance concrete combined beam structure of fin-plate type bridge floor Download PDFInfo
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- CN204703055U CN204703055U CN201520345157.8U CN201520345157U CN204703055U CN 204703055 U CN204703055 U CN 204703055U CN 201520345157 U CN201520345157 U CN 201520345157U CN 204703055 U CN204703055 U CN 204703055U
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Abstract
The utility model relates to a kind of steel based on fin-plate type bridge floor-ultra-high performance concrete combined beam structure, comprise girder steel, described girder steel is placed with ultra-high performance concrete bridge deck, described ultra-high performance concrete bridge deck are fixed together by shear connector and girder steel, be provided with by the crisscross steel mesh reinforcement formed of reinforcing bar in described ultra-high performance concrete bridge deck, at least one in the cross section of described ultra-high performance concrete bridge deck and longitudinal section is rib structure, and can at vertical rib or/and cross rib region arranges prestressed reinforcement, to form fin-plate type ultra-high performance concrete bridge deck.The utility model combined beam structure reasonable stress, intensity are high, significantly can reduce dead load, effectively avoid the generation of combining continuous beam hogging moment area disease, give full play to ultra-high performance concrete tension, compressive strength and high-durability, have that building height is little, rigidity is large, from heavy and light, good endurance, the advantage such as cracking resistance is good, anti-fatigue performance is good.
Description
Technical field
The utility model relates to technical field of civil engineering, especially a kind of steel based on fin-plate type bridge floor-ultra-high performance concrete combined beam structure.
Background technology
Combined beam structure, because of the advantage such as its reasonable utilization of materials, economy, construction be convenient, is able to extensive use in road and bridge and building field.But the concrete in tension in combining structure continuous beam Fu Wan district is easy to crack, causes compound beam poor durability.For head it off, adopt two kinds of method process in design at present: a kind of method is the concrete slab cracking allowed in structure, but limit its crack width, the reinforcement ratio normally increasing structure makes concrete slab meet the limit value of crack width under normal usage, i.e. strong arrangement of reinforcement method; Another kind method does not allow the concrete slab in structure to ftracture or allows its few cracking, the method that usual employing applies compressive pre-stress reduces or avoids concrete slab to occur tensile stress, as preload system, support displacement method, presstressed reinforcing steel method, rear conjugative bridge panel presstressed reinforcing steel method etc.Strong arrangement of reinforcement method is only applicable to the construction of middle-small span when being used alone, because of its long-term work with cracking, there is adverse effect to durability.The method applying compressive pre-stress is inevitably also applied with subsidiary stress to shear connector, not only increases the burden of girder steel, has also slackened the effect to the compressive pre-stress that concrete slab applies; Though arrange ater-casting to avoid subsidiary stress to shear connector, ater-casting and precast concrete linkage interface adhesion strength poor, and there is again stressed weak link or the problem of etching channels at the linkage interface place of unlike material in compound beam.
Ultra-high performance concrete (UHPC) is the very-high performance Fiber Reinforced Cement Based Composites of a kind of high strength, high-modulus, high ductility, special in the RPC (RPC) in ultra-high performance concrete, be that in numerous ultra-high performance concrete, application is also a kind of New Building Materials most with prospects at most.Usual compressive strength is not less than 100MPa, axial tensile strength is not less than 8MPa, by arranging that in UHPC steel mesh reinforcement strengthens the resistance to tension of structure further.UHPC also has quite high compactness, and impervious coefficient is very high, and moisture substantially not easily enters tack coat through UHPC.If replace ordinary concrete structure with UHPC, usually can adopt less thickness of slab, reduce dead load, thus reduce construction costs.
Utility model content
In view of the deficiencies in the prior art, the purpose of this utility model is to provide a kind of steel based on fin-plate type bridge floor-ultra-high performance concrete combined beam structure, this structure stress is reasonable, intensity is high, significantly can reduce dead load, effectively avoid the generation of combining continuous beam hogging moment area disease, give full play to ultra-high performance concrete tension, compressive strength and high-durability.
To achieve these goals, the technical solution of the utility model is: a kind of steel based on fin-plate type bridge floor-ultra-high performance concrete combined beam structure, comprise girder steel, described girder steel is placed with ultra-high performance concrete bridge deck, described ultra-high performance concrete bridge deck are fixed together by shear connector and girder steel, be provided with by the crisscross steel mesh reinforcement formed of reinforcing bar in described ultra-high performance concrete bridge deck, at least one in the cross section of described ultra-high performance concrete bridge deck and longitudinal section is rib structure, to form fin-plate type ultra-high performance concrete bridge deck.
Preferably, described ultra-high performance concrete bridge deck are built by ultra-high performance concrete to form, and described ultra-high performance concrete is RPC, very-high performance fibre reinforced concrete or slip casting fibrous concrete.
Preferably, described ultra-high performance concrete bridge deck lower edge direction across bridge is provided with vertical rib by predetermined spacing, and the cross-sectional shape of described vertical rib is U-shaped, trapezoidal or rectangle.
Preferably, described ultra-high performance concrete bridge deck are provided with prestressed reinforcement in vertical rib region.
Preferably, described ultra-high performance concrete bridge deck lower edge is provided with cross rib along bridge to by predetermined spacing, and the cross-sectional shape of described cross rib is U-shaped, trapezoidal or rectangle.
Preferably, described ultra-high performance concrete bridge deck are provided with prestressed reinforcement in cross rib region.
Preferably, the prestressed pore passage for wearing prestressed reinforcement is provided with in described ultra-high performance concrete bridge deck.
Preferably, described shear connector is weldering nail connector, PBL shear connector or channel-section steel shear connector.
Preferably, described girder steel is i section steel beam or flute profile girder steel, and described flute profile girder steel is single case or many box structures, is provided with single chamber or multicell in the case of described flute profile girder steel.
Preferably, the thickness of described ultra-high performance concrete bridge deck is 5 ~ 12cm.
Compared with prior art, the utility model has following beneficial effect: this steel-ultra-high performance concrete combined beam structure reasonable stress based on fin-plate type bridge floor, intensity are high, significantly can reduce dead load, effectively avoid the generation of combining continuous beam hogging moment area disease, give full play to ultra-high performance concrete tension, compressive strength and high-durability, have that building height is little, rigidity is large, from heavy and light, good endurance, the advantage such as cracking resistance is good, anti-fatigue performance is good, have great practical value and good economic benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment one.
Fig. 2 is the sectional view at A-A place in Fig. 1.
Fig. 3 is the structural representation of the utility model embodiment two.
Mark in figure: 1-girder steel, 1-1-i section steel beam, 1-2-flute profile girder steel, 2-ultra-high performance concrete bridge deck, 3-shear connector, 4-indulges rib, 5-cross rib, 6-prestressed pore passage, 7-prestressed reinforcement.
Detailed description of the invention
For above-mentioned feature and advantage of the present utility model can be become apparent, special embodiment below, and coordinate accompanying drawing, be described in detail below.
As shown in Fig. 1 ~ 3, a kind of steel based on fin-plate type bridge floor-ultra-high performance concrete combined beam structure, comprise girder steel 1, described girder steel 1 is placed with ultra-high performance concrete bridge deck 2, described ultra-high performance concrete bridge deck 2 are fixed together by shear connector 3 and girder steel 1, be provided with by the crisscross steel mesh reinforcement formed of reinforcing bar in described ultra-high performance concrete bridge deck 2, at least one in the cross section of described ultra-high performance concrete bridge deck 2 and longitudinal section is rib structure, to form fin-plate type ultra-high performance concrete bridge deck 2.
Wherein, described ultra-high performance concrete bridge deck 2 are built by ultra-high performance concrete to form, described ultra-high performance concrete refers to containing steel fibre, compressive strength is not less than 100MPa, axial tensile strength is not less than 8MPa cement concrete in component, such as RPC, very-high performance fibre reinforced concrete, slip casting fibrous concrete etc.
In the utility model embodiment one, as shown in Figure 1 and 2, described ultra-high performance concrete bridge deck 2 lower edge direction across bridge is provided with vertical rib 4 by predetermined spacing, described ultra-high performance concrete bridge deck 2 lower edge is provided with cross rib 5 along bridge to by predetermined spacing, the cross-sectional shape of described vertical rib 4 and cross rib 5 is U-shaped, can certainly be trapezoidal or rectangle etc.
In the utility model embodiment one, described shear connector 3 is weldering nail connector, can certainly be PBL shear connector or channel-section steel shear connector etc.Described girder steel 1 can be i section steel beam 1-1, also can make flute profile girder steel 1-2; Described flute profile girder steel 1-2 can be single case or many box structures, can be provided with single chamber or multicell in case.Described ultra-high performance concrete bridge deck 2 are thinner, and its thickness is 5 ~ 12cm.
In the utility model embodiment two, as shown in Figure 3, embodiment two is with the main distinction implementing: described ultra-high performance concrete bridge deck 2 are provided with prestressed pore passage 6 in vertical rib region and cross rib region, are equipped with prestressed reinforcement 7 in described prestressed pore passage 6.
Especially, it should be noted that, described ultra-high performance concrete bridge deck 2 also can be only cross section or only longitudinal section be rib structure, can also be only indulge rib region or only cross rib region prestressed reinforcement 7 is set.
The utility model is not limited to above-mentioned preferred forms, and anyone can draw other various forms of steel based on fin-plate type bridge floor-ultra-high performance concrete combined beam structures under enlightenment of the present utility model.All equalizations done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (10)
1. the steel based on fin-plate type bridge floor-ultra-high performance concrete combined beam structure, comprise girder steel, it is characterized in that: described girder steel is placed with ultra-high performance concrete bridge deck, described ultra-high performance concrete bridge deck are fixed together by shear connector and girder steel, be provided with by the crisscross steel mesh reinforcement formed of reinforcing bar in described ultra-high performance concrete bridge deck, at least one in the cross section of described ultra-high performance concrete bridge deck and longitudinal section is rib structure, to form fin-plate type ultra-high performance concrete bridge deck.
2. the steel based on fin-plate type bridge floor according to claim 1-ultra-high performance concrete combined beam structure, it is characterized in that: described ultra-high performance concrete bridge deck are built by ultra-high performance concrete to form, described ultra-high performance concrete is RPC, very-high performance fibre reinforced concrete or slip casting fibrous concrete.
3. the steel based on fin-plate type bridge floor according to claim 1-ultra-high performance concrete combined beam structure, it is characterized in that: described ultra-high performance concrete bridge deck lower edge direction across bridge is provided with vertical rib by predetermined spacing, the cross-sectional shape of described vertical rib is U-shaped, trapezoidal or rectangle.
4. the steel based on fin-plate type bridge floor according to claim 3-ultra-high performance concrete combined beam structure, is characterized in that: described ultra-high performance concrete bridge deck are provided with prestressed reinforcement in vertical rib region.
5. the steel based on fin-plate type bridge floor according to claim 1 or 3-ultra-high performance concrete combined beam structure, it is characterized in that: described ultra-high performance concrete bridge deck lower edge is provided with cross rib along bridge to by predetermined spacing, the cross-sectional shape of described cross rib is U-shaped, trapezoidal or rectangle.
6. the steel based on fin-plate type bridge floor according to claim 5-ultra-high performance concrete combined beam structure, is characterized in that: described ultra-high performance concrete bridge deck are provided with prestressed reinforcement in cross rib region.
7. the steel based on fin-plate type bridge floor according to claim 4 or 6-ultra-high performance concrete combined beam structure, is characterized in that: be provided with the prestressed pore passage for wearing prestressed reinforcement in described ultra-high performance concrete bridge deck.
8. the steel based on fin-plate type bridge floor according to claim 1-ultra-high performance concrete combined beam structure, is characterized in that: described shear connector is weldering nail connector, PBL shear connector or channel-section steel shear connector.
9. the steel based on fin-plate type bridge floor according to claim 1-ultra-high performance concrete combined beam structure, it is characterized in that: described girder steel is i section steel beam or flute profile girder steel, described flute profile girder steel is single case or many box structures, is provided with single chamber or multicell in the case of described flute profile girder steel.
10. the steel based on fin-plate type bridge floor according to claim 1-ultra-high performance concrete combined beam structure, is characterized in that: the thickness of described ultra-high performance concrete bridge deck is 5 ~ 12cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520345157.8U CN204703055U (en) | 2015-05-26 | 2015-05-26 | Based on the steel-ultra-high performance concrete combined beam structure of fin-plate type bridge floor |
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| CN201520345157.8U CN204703055U (en) | 2015-05-26 | 2015-05-26 | Based on the steel-ultra-high performance concrete combined beam structure of fin-plate type bridge floor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831617A (en) * | 2015-05-26 | 2015-08-12 | 福州大学 | Steel-super high performance concrete composite beam based on ribbed plate type bridge deck and construction method |
| CN105839510A (en) * | 2016-05-23 | 2016-08-10 | 西安公路研究院 | Steel-ultra-high-performance concrete combined continuous beam bridge structure and construction method thereof |
| CN112982161A (en) * | 2021-02-09 | 2021-06-18 | 中铁大桥局集团有限公司 | Steel-concrete combined bridge deck structure and bridge |
-
2015
- 2015-05-26 CN CN201520345157.8U patent/CN204703055U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831617A (en) * | 2015-05-26 | 2015-08-12 | 福州大学 | Steel-super high performance concrete composite beam based on ribbed plate type bridge deck and construction method |
| CN105839510A (en) * | 2016-05-23 | 2016-08-10 | 西安公路研究院 | Steel-ultra-high-performance concrete combined continuous beam bridge structure and construction method thereof |
| CN112982161A (en) * | 2021-02-09 | 2021-06-18 | 中铁大桥局集团有限公司 | Steel-concrete combined bridge deck structure and bridge |
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