CN102561181A - Composite steel-fiber reinforced cement-base bridge deck - Google Patents
Composite steel-fiber reinforced cement-base bridge deck Download PDFInfo
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- CN102561181A CN102561181A CN2012100055024A CN201210005502A CN102561181A CN 102561181 A CN102561181 A CN 102561181A CN 2012100055024 A CN2012100055024 A CN 2012100055024A CN 201210005502 A CN201210005502 A CN 201210005502A CN 102561181 A CN102561181 A CN 102561181A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a composite steel-fiber reinforced cement-base bridge deck, comprising a composite fiber reinforced pultrusion plate, a composite fiber cement-base reinforced surface layer with reinforcing steel bar meshes inside, and vertical steel tie bars, wherein the composite fiber reinforced pultrusion plate has U-shaped convex ribs and U-shaped concave ribs which are used for increasing rigidity of the composite pultrusion plate; a light concrete layer is arranged between the composite fiber reinforced pultrusion plate and the composite fiber cement-base reinforced surface layer; reinforcing steel bars arranged in the light concrete layer are located in the U-shaped convex ribs; one end of the vertical steel tie bars is connected with the reinforcing steel bars; the other end of the vertical steel tie bars is connected with the reinforcing steel bar meshes in the composite fiber cement-base reinforced surface layer to form a composite shear key, so that the composite fiber cement-base reinforced surface layer in the composite steel-fiber reinforced cement-base bridge deck can work together with the light concrete layer and the composite fiber reinforced pultrusion plate.
Description
Technical field
The present invention relates to the combined member that a kind of steel, fibre reinforced composites and fiber reinforced cement-based composite material with higher ductility and endurance quality forms; Belong to new material new construction and combining structure field; Can be widely used in the medium and small of One's name is legion and stride in the bridge of footpath, accelerate to build and the maintenance replacement velocity.
Background technology
The infrastructure of highway bridge is developed along with the national communication career development in recent years fast.Through operation for many years, the thing followed is the problem of aging of bridge, and especially the bridge in adverse circumstances (freeze thawing, acid, alkali, salt, ultraviolet ray, humidity, briny environment) seems particularly outstanding.Numerous medium and small striding in the bridge of footpath, concrete slab bears the reciprocating of vehicular load, and Effect of Environmental is one of member of easy damaged destruction in addition.The facing concrete of cracking has transmission characteristic, and chloride or other corrosive mediums are easy to infiltrate into rebar surface from surface layer, and corrosion of steel bar produces swelling stress then, finally causes the concrete cover of fragility to peel off.The fatigue damage of bridge deck is destroyed not only influences the normal current of vehicle, and influences the safety and the durability of substructure.How to utilize scientific method, prolong newly-built and the service life of bridge construction beam, the maintenance and reinforcement that carries out economical rationality has become instant problem.
Fibre reinforced composites (Fiber Reinforced Polymer, FRP) since its have high-strength, lightweight, good endurance, be convenient to construction, advantage such as the later maintenance expense is low, in civil engineering, be widely used.FRP also can be made into the FRP muscle and substitute reinforcing bar formation FRP muscle (presstressed reinforcing steel)-concrete component, or make up each other through certain connected mode with concrete, timber, steel except being used for the concrete component reinforcing, forms combined member.These combined members through after the standardized production, are transported to the job site and assemble, can satisfy the requirement that bridge is built fast.Simultaneously, the high-durability of FRP can also can solve the endurance issues of bridge.
ECC (Engineered cementitous composite) is a kind of fiber reinforced cement-based composite material of high ductility high-durability.It is based on the material method for designing of micro-fracture mechanics, through system's design, under stretching and shear load, shows a kind of fiber reinforced cement-based composite material of high ductibility.The fiber volume volume is merely 2% among the ECC, but its tensile strain is greater than 3%, far above ordinary concrete and steel fibrous concrete.ECC shows the strain-stress relation of similar reinforcing bar under the uniaxial load effect after under load action, ftractureing, promptly so-called strain hardening (Strain-Harding) effect.This excellent mechanical property, overcome concrete cracking after, stress reduces rapidly, the shortcoming that carry out rapidly in the crack.The compressive strength of ECC is similar with ordinary concrete.In addition, ECC has good anti-fatigue performance and endurance quality.Therefore, for the bridge deck that bear vehicle fatigue loading and environmental activity, ECC is undoubtedly a kind of good material.
Interface problem between FRP and the concrete be combined member can cooperative basis, also be engineering construction and the key issue between the operating period.At present, FRP and concrete binding technology adopt methods such as epoxy bond layer, FRP surfaces coated sand usually.Existing result of study shows that under present bonding technology, bond damage is a kind of common damage form between FRP and concrete interface, show as usually curved, the FRP of shear crack place peels off, concrete cover is peeled off and peel off the FRP end.
Can the material of good mechanical performance such as steel, FRP, ECC be combined, give full play to advantage separately, realize that material property is complementary.In view of this, the present invention proposes a kind of steel-FRP-ECC combined bridge deck.
Summary of the invention
Build fast and maintenance and reinforcement for satisfying bridge, the present invention proposes and a kind ofly can make that to satisfy bridge floor plate hight ductility high durable and from the steel-fiber reinforced cement-based composite material combined bridge deck of heavy and light.
The present invention adopts following technical scheme:
Comprise: the fibre reinforced composites pultruded panels; In establish reinforced mesh fiber cement-based enhancing composite cover and vertical steel tie; Described reinforced composite pultruded panels has " U " type fin and the recessed rib of " U " type that increases the composite material drawing and extruding panel stiffness; Between fibre reinforced composites pultruded panels and fiber cement-based enhancing composite cover, be provided with the light weight concrete construction layer; In the light weight concrete construction layer, be provided with reinforcing bar and reinforcing bar and be positioned at " U " type fin, an end of said vertical steel tie is connected with reinforcing bar, and the other end of vertical steel tie is connected with the interior reinforced mesh of fiber cement-based enhancing composite cover.
Advantage of the present invention is:
(1) the fibre reinforced composites pultruded panels that has " U " type fin and the recessed rib of " U " type that the present invention proposes; " U " type fin wherein and the recessed rib of " U " type can increase the rigidity of fibre reinforced composites pultruded panels; When avoiding building top light weight concrete construction layer and fiber cement-based enhancing composite cover (ECC); Cause the distortion of fibre reinforced composites pultruded panels excessive under the effect of loads such as the deadweight of the deadweight of light weight concrete construction, fiber cement-based enhancing composite cover and constructor, construction machinery, influence is normally used.
(2) the horizontal connection between the fibre reinforced composites pultruded panels is reliable, easy, and it is bonding that promptly " U " type fin of connecting part directly embeds back use epoxy resin isocolloid each other.Method of attachment commonly used has the bolt connection to be connected with glued between the fibre reinforced composites pultruded panels.The bolt connection need be holed on the fibre reinforced composites pultruded panels, passes bolt and tightens.The glued connection is primarily aimed at the fibre reinforced composites pultruded panels with groove and fin, and to guarantee to connect reliable, also need be provided with pin in the junction.No matter be that bolt connects or glued the connection, all need perforate on the fibre reinforced composites pultruded panels, the globality of fibre reinforced composites pultruded panels sustains damage.In addition, in order to increase bond area, also to groove and fin be set in fibre reinforced composites pultruded panels junction in advance.Horizontal method of attachment between the fibre reinforced composites pultruded panels that the present invention proposes has overcome the method for attachment disadvantage between the fibre reinforced composites pultruded panels in the past, and easy construction, quick.
(3) the compound shear connector of reinforcing bar.Longitudinal reinforcement in longitudinal reinforcement in vertical steel tie that the present invention is provided with in bridge deck and the fiber cement-based enhancing composite cover and the fibre reinforced composites pultruded panels in " U " type fin forms the compound shear connector of reinforcing bar.The effect of the compound shear connector of reinforcing bar is to make fiber cement-based enhancing composite cover, light weight concrete construction layer and the fibre reinforced composites pultruded panels can co-operation.
(4) stressed rationally clear and definite.Steel-fiber reinforced cement-based composite material combined bridge deck that the present invention proposes can be given full play to the different materials mechanical property, as examining tensile behaviors such as reinforcing bar and FRP plate preferably material configuration mainly bear pulling force in the tensile region.Both combine not only can bring into play the characteristics of FRP high-strength light, and can improve the FRP brittle behavior through reinforcing bar, strengthens the ductility of combined member.Fiber cement-based enhancing composite cover (ECC) as a kind of high-durability, have self-repair function material configuration at pressure zone, can improve the crack resistance of bridge floor, strengthen the anti-fatigue performance and the endurance quality of compoboard.The girder steel and the upper group plywood that are configured in the bottom bear moment of flexure jointly through peg formation compound beam, and the web of girder steel can bear vertical shear.
(5) rigidity of combined bridge deck obtains bigger raising.The upper strata of steel-fiber reinforced cement-based composite material combined bridge deck that the present invention proposes is fiber cement-based enhancing composite cover (ECC) and light weight concrete construction; Increased the rigidity of steel-fiber reinforced cement-based composite material combined bridge deck; Avoid pressure zone frange plate and web generation cripling, overcome the shortcoming of full FRP bridge deck.
(6) be convenient to processing, improve efficiency of construction.The fibre reinforced composites pultruded panels can be according to the needs of Construction unit, and the base plate that is processed into different size is transported to the job site, and can carry out secondary operations at the construction field (site) as required.
(7) durability and anti-fatigue performance are excellent, and the later maintenance expense is few.The fiber cement-based enhancing composite cover (ECC) that is configured in top has good durability and anti-fatigue performance.
(8) peg directly is configured in the concrete, and unlike the compound beam of other types, peg need pass the fibre reinforced composites pultruded panels, destroys the globality of fibre reinforced composites pultruded panels.
(9) applied range.Combined bridge deck can be used as plank beams and directly is used for the medium and small footpath bridge of striding, and also can use shear connector or other connected mode to form combined bridge with girder steel or precast concrete beam.
Description of drawings
Fig. 1 is steel-fiber reinforced cement-based composite material combined bridge deck sketch map.
Fig. 2 is girder steel and steel-fiber reinforced cement-based composite material combined bridge deck connected mode sketch map.
The fibre reinforced composites pultruded panels of 1. band " U " type fins and recessed rib, 2. " U " type fin, the 3. recessed rib of " U " type among the figure; 4. fiber cement-based enhancing composite cover, 5. light weight concrete construction layer, the reinforcing bar of 6. filling in " U " type fin; 7. reinforced mesh, 8. vertical steel tie, 9. girder steel; 10. peg, 11. backing plates.
The specific embodiment
Steel-fiber reinforced cement-based composite material combined bridge deck; Comprise: fibre reinforced composites pultruded panels 1; In establish the fiber cement-based enhancing composite cover 4 and vertical steel tie 8 of reinforced mesh 7; Described reinforced composite pultruded panels 1 has " U " type fin 2 and the recessed rib 3 of " U " type that increases the composite material drawing and extruding panel stiffness; Between fibre reinforced composites pultruded panels 1 and fiber cement-based enhancing composite cover 4, be provided with light weight concrete construction layer 5; In light weight concrete construction layer 5, be provided with reinforcing bar 6 and reinforcing bar 6 and be positioned at " U " type fin 2, an end of said vertical steel tie 8 is connected with reinforcing bar 6, and the other end of vertical steel tie 8 is connected with fiber cement-based enhancing composite cover 4 interior reinforced mesh 7; Form compound shear connector, make the fiber cement-based enhancing composite cover 4 in steel-fiber reinforced cement-based composite material combined bridge deck can co-operation with light weight concrete construction layer 5 and fibre reinforced composites pultruded panels 1.Need " U " type fin 2 in two horizontally-spliced pultruded panels can make fibre reinforced composites pultruded panels 1 horizontally-spliced in the fibre reinforced composites pultruded panels 1, form whole steel-fiber reinforced cement-based composite material combined bridge deck through mutual wedge action.
Below in conjunction with the description of drawings specific embodiment:
A. on the girder steel 9 backing plate 11 is set,
B. on backing plate 11, spread the fibre reinforced composites pultruded panels 1 of band " U " type fin 2 and recessed rib 3 as required,
C., peg 10 is set on girder steel 9 in advance,
F. cast light weight concrete construction 5 on the fibre reinforced composites pultruded panels 1 of band " U " type fin 2 and recessed rib 3 and girder steel 9,
G. on light weight concrete construction 5, build fiber cement-based enhancing composite cover 4, treat that the concrete of newly building reaches design strength after, promptly form steel-fiber reinforced cement-based composite material combined bridge deck.
Claims (2)
1. steel-fiber reinforced cement-based composite material combined bridge deck; It is characterized in that; Comprise: fibre reinforced composites pultruded panels (1); In establish the fiber cement-based enhancing composite cover (4) and the vertical steel tie (8) of reinforced mesh (7); Described reinforced composite pultruded panels (1) has " U " type fin (2) and the recessed rib of " U " type (3) that increases the composite material drawing and extruding panel stiffness; Between fibre reinforced composites pultruded panels (1) and fiber cement-based enhancing composite cover (4), be provided with light weight concrete construction layer (5); In light weight concrete construction layer (5), be provided with reinforcing bar (6) and reinforcing bar (6) is positioned at " U " type fin (2), an end of said vertical steel tie (8) is connected with reinforcing bar (6), and the other end of vertical steel tie (8) is connected with the interior reinforced mesh (7) of fiber cement-based enhancing composite cover (4).
2. steel according to claim 1-fiber reinforced cement-based composite material combined bridge deck; It is characterized in that; Said fibre reinforced composites pultruded panels (1) is made up of interconnective fibre reinforced composites pultrusion unit board, and the abutting end of adjacent fiber reinforced composite pultrusion unit board is embedded connection.
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| CN2012100055024A CN102561181A (en) | 2012-01-10 | 2012-01-10 | Composite steel-fiber reinforced cement-base bridge deck |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943436A (en) * | 2012-12-07 | 2013-02-27 | 湖南大学 | Steel-ultra-high performance concrete combined bridge deck structure with shearing resisting structure and construction method thereof |
| CN103114524A (en) * | 2013-02-06 | 2013-05-22 | 湖南大学 | Light type wave-shaped steel and high-strength activity powder concrete composite bridge panel |
| CN103422434A (en) * | 2013-07-18 | 2013-12-04 | 浙江中隧桥波形钢腹板有限公司 | Corrugated sheet steel composite structure bridge deck system |
| CN104389266A (en) * | 2014-11-14 | 2015-03-04 | 南京工业大学 | Composite material shear key for steel-concrete combined structure |
| CN104612049A (en) * | 2015-01-21 | 2015-05-13 | 大连理工大学 | Bridge floor reinforcing pavement layer by adoption of lightweight concrete |
| 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 |
| CN107386110A (en) * | 2017-08-07 | 2017-11-24 | 张家港市兴鸿达基础有限公司 | A kind of high intensity prefabricated components of crack resistence |
| CN109930467A (en) * | 2019-04-10 | 2019-06-25 | 西南交通大学 | Steel-ECC- concrete combination beam and preparation method thereof |
| CN112196583A (en) * | 2020-11-26 | 2021-01-08 | 广东工业大学 | Method for reinforcing cracked tunnel lining by embedding fiber cables on surface layer |
| CN113322789A (en) * | 2021-06-29 | 2021-08-31 | 清华大学 | Fiber reinforced composite material pultruded profile and concrete combined hanging beam and bridge |
-
2012
- 2012-01-10 CN CN2012100055024A patent/CN102561181A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943436A (en) * | 2012-12-07 | 2013-02-27 | 湖南大学 | Steel-ultra-high performance concrete combined bridge deck structure with shearing resisting structure and construction method thereof |
| CN102943436B (en) * | 2012-12-07 | 2015-04-01 | 湖南大学 | Steel-ultra-high performance concrete combined bridge deck structure with shearing resisting structure and construction method thereof |
| CN103114524A (en) * | 2013-02-06 | 2013-05-22 | 湖南大学 | Light type wave-shaped steel and high-strength activity powder concrete composite bridge panel |
| CN103422434A (en) * | 2013-07-18 | 2013-12-04 | 浙江中隧桥波形钢腹板有限公司 | Corrugated sheet steel composite structure bridge deck system |
| CN103422434B (en) * | 2013-07-18 | 2016-12-28 | 浙江中隧桥波形钢腹板有限公司 | Corrugated sheet steel combinative structure bridge floor system |
| CN104389266A (en) * | 2014-11-14 | 2015-03-04 | 南京工业大学 | Composite material shear key for steel-concrete combined structure |
| 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 |
| CN104612049A (en) * | 2015-01-21 | 2015-05-13 | 大连理工大学 | Bridge floor reinforcing pavement layer by adoption of lightweight concrete |
| CN107386110A (en) * | 2017-08-07 | 2017-11-24 | 张家港市兴鸿达基础有限公司 | A kind of high intensity prefabricated components of crack resistence |
| CN109930467A (en) * | 2019-04-10 | 2019-06-25 | 西南交通大学 | Steel-ECC- concrete combination beam and preparation method thereof |
| CN109930467B (en) * | 2019-04-10 | 2023-10-10 | 西南交通大学 | Steel-ECC-concrete composite beam and preparation method thereof |
| CN112196583A (en) * | 2020-11-26 | 2021-01-08 | 广东工业大学 | Method for reinforcing cracked tunnel lining by embedding fiber cables on surface layer |
| CN113322789A (en) * | 2021-06-29 | 2021-08-31 | 清华大学 | Fiber reinforced composite material pultruded profile and concrete combined hanging beam and bridge |
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Application publication date: 20120711 |