CN116695563A - Light bridge deck of ultra-high performance concrete and steel combined structure - Google Patents
Light bridge deck of ultra-high performance concrete and steel combined structure Download PDFInfo
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- CN116695563A CN116695563A CN202310618645.0A CN202310618645A CN116695563A CN 116695563 A CN116695563 A CN 116695563A CN 202310618645 A CN202310618645 A CN 202310618645A CN 116695563 A CN116695563 A CN 116695563A
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- performance concrete
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 183
- 239000010959 steel Substances 0.000 title claims abstract description 183
- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 86
- 239000002131 composite material Substances 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 11
- 238000010276 construction Methods 0.000 abstract description 11
- 238000007789 sealing Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 6
- 238000005452 bending Methods 0.000 description 13
- 238000003466 welding Methods 0.000 description 10
- 230000002787 reinforcement Effects 0.000 description 6
- 239000004567 concrete Substances 0.000 description 5
- 230000002457 bidirectional effect Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005056 compaction Methods 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
- 230000032798 delamination Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/268—Composite concrete-metal
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a light bridge deck plate with an ultra-high performance concrete and steel combined structure, which comprises a prefabricated steel plate, wherein the prefabricated steel plate is bent and prefabricated to form a plurality of forward-bridge grooves which are arranged at intervals in the transverse direction, the bottom surface of the prefabricated steel plate is provided with a plurality of transverse-bridge-direction stiffening ribs at intervals in the forward direction, the top surface of the prefabricated steel plate is provided with a shear connector, the end parts of the two forward-bridge-direction sides of the prefabricated steel plate are provided with end sealing plates, the prefabricated steel plate is hoisted to the top surface of a bridge deck system steel beam, the end sealing plates and the top plate of the steel beam form transverse-direction grooves, the top surface of the prefabricated steel plate is provided with reinforcing steel meshes, ultra-high performance concrete is poured, the forward-bridge-direction grooves of the prefabricated steel plate are filled with the ultra-high performance concrete, and the forward-bridge-direction groove ribs and the transverse-bridge-direction groove ribs are respectively formed after the transverse-direction grooves are combined with the prefabricated steel plate through the shear connector to form the combined bridge deck plate. The invention has the advantages of light components, strong spanning capability, convenient construction, full play of the stress performance of the material, good fatigue resistance and good economy.
Description
Technical Field
The invention belongs to the technical field of bridge deck plate structural design, and particularly relates to a light bridge deck plate with an ultra-high performance concrete and steel combined structure, in particular to a light bridge deck plate structure with a rib plate type ultra-high performance concrete and prefabricated bending steel plate combined structure.
Background
With the increasing increase of traffic and increasing of overload phenomenon, the traditional orthotropic steel bridge deck structure is extremely easy to generate cracks, delamination, rutting and other diseases after being paved on the steel bridge deck for 3-5 years of use due to the insufficient local rigidity and fatigue performance, and more serious, the steel bridge deck itself generates fatigue cracks, which causes harm to structural safety and durability. The engineering world solves the steel bridge deck problem based on two ideas: the first thinking is to improve the pavement layer performance and the steel girder fatigue performance respectively, and treat the two problems separately; the second thinking is to adopt a steel and concrete combined structure, and solve two diseases at the same time, but for the steel and common concrete combined structure, the problem of poor cracking resistance of the concrete layer still exists.
Ultra-high performance concrete (UHPC for short) is a novel cement-based material which is different from common high performance concrete in material composition, mix proportion design, microstructure and other aspects, the compressive strength is often more than 120MPa, the axial tensile strength reaches 7-12 MPa, the ultimate tensile strain can reach 1500-4000 mu, and the Ultra-high strength and Ultra-long durability are realized, so that the large span of the engineering material performance is realized. The common reinforced concrete-steel combined bridge deck system has the advantages of large dead weight, poor cracking resistance and durability, light dead weight, difficult cracking, good durability, low total life cycle cost and the like when the scheme of adopting the ultra-high performance concrete (UHPC) +steel combined bridge deck is adopted to effectively prevent and treat the diseases of the steel bridge deck, and the scheme is more and more valued by the engineering field.
The technical scheme adopted in the prior steel-ultra-high performance concrete combined bridge deck structure is that a reinforcing UHPC layer is overlapped on a traditional orthotropic steel bridge deck system adopting closed stiffening ribs (U ribs) or open stiffening ribs (I-shaped ribs or flat-bulb steel), and the two are connected through a shear connector. The combined bridge deck has a plurality of application cases in the traditional steel bridge deck reinforcement and newly-built bridge, the thickness of the UHPC structural layer is between 3.5 and 6cm, and the thickness of the original steel bridge deck is optimized from 14 to 16mm to 12 to 14mm in consideration of the improvement of the rigidity of the combined bridge deck. However, the welding workload of the orthotropic steel bridge deck adopting the closed stiffening ribs in the structural form is large, and the steel consumption of the bridge deck system is high, so that the economy is poor; the UHPC-steel combined bridge deck with the open ribs has insufficient longitudinal bending rigidity and weak crossing capacity, and can increase the steel consumption of the cross beams and the cross ribs.
Disclosure of Invention
In view of the above, the present invention is to provide a lightweight bridge deck with ultra-high performance concrete and steel combined structure, so as to solve the defects in the prior art.
In order to achieve the above object, the present invention is achieved by the following technical solutions:
the utility model provides a light-duty decking of ultra-high performance concrete and steel integrated configuration, including the prefabricated steel sheet, the prefabricated steel sheet is buckled prefabrication and is formed a plurality of along to the recess of horizontal bridge to interval arrangement, the bottom surface of prefabricated steel sheet is along to interval arrangement a plurality of horizontal bridge to stiffening rib, the top surface of prefabricated steel sheet is equipped with the shear force connecting piece, the along bridge to both sides tip of prefabricated steel sheet is equipped with the end shrouding, the hoist and mount of prefabricated steel sheet are to bridge deck system steel beam top surface, the end shrouding forms horizontal bridge to the recess with steel beam roof the ultra-high performance concrete is pour after setting up the reinforcing bar net piece on the top surface of prefabricated steel sheet, ultra-high performance concrete fills the along to the recess of prefabricated steel sheet and form respectively behind horizontal bridge to recess rib and horizontal bridge to recess rib, and pass through the shear force connecting piece with the prefabricated steel sheet combines to form the combined decking.
The light bridge deck slab with the ultra-high performance concrete and steel combined structure comprises a prefabricated steel plate, wherein the prefabricated steel plate is provided with a groove rib, the groove rib is arranged on the top surface of the prefabricated steel plate, the steel bar is arranged on the inner side wall of the groove rib, and the steel bar is arranged on the inner side wall of the groove rib.
The light bridge deck plate with the ultra-high performance concrete and steel combined structure comprises a group of steel bar heads which are arranged at intervals, and one side of each steel bar head is welded with the inner side wall of the groove along the bridge direction.
The light bridge deck plate of the ultra-high performance concrete and steel combined structure, the steel bar connecting piece further comprises a longitudinal steel bar, and the other side of the steel bar head is welded with the longitudinal steel bar.
The light bridge deck slab with the ultra-high-performance concrete and steel combined structure is normal-temperature curing type ultra-high-performance concrete or steam curing type ultra-high-performance concrete, the axial tensile strength of the ultra-high-performance concrete is 7-12 Mpa, the ultimate tensile strain of the ultra-high-performance concrete is more than 2000 mu, and the total shrinkage strain of the ultra-high-performance concrete in 28 days is 150-1000 mu.
And the forward bridge direction prestress steel bundles are arranged in the forward bridge direction groove ribs according to the stress requirement.
The light bridge deck slab with the ultra-high performance concrete and steel combined structure is characterized in that the ratio of the spacing between the parallel bridge groove ribs to the span of the parallel bridge groove ribs is 1/3-1/4.
The light bridge deck slab with the ultra-high performance concrete and steel combined structure is characterized in that the longitudinal section of the forward bridge groove is rectangular or trapezoidal.
The technical scheme of the invention has the beneficial effects that:
compared with the conventional orthotropic steel deck slab, the ribbed plate type ultra-high performance concrete and steel structure combined light deck slab has better fatigue resistance, bending rigidity of a deck system and paving durability;
compared with an orthotropic steel bridge deck combined bridge deck system of a UHPC structural layer or a traditional closed stiffening rib, the bridge deck system scheme adopted by the invention has lower steel consumption, and avoids a large number of longitudinal welding seams of the U ribs and the top plate, so that the construction is convenient and quick, and the economy is better;
compared with a UHPC combined bridge deck plate with a unidirectional corrugated steel plate or a profiled steel plate and provided with perforated plate connectors in a groove, the invention simultaneously solves the problem of connecting structures of the combined bridge deck plate and longitudinal beams and transverse beams, well participates in bidirectional stress of bridge deck systems, main beams and transverse beams, so that the stress efficiency of the structure is higher, the integrity is better, and the combined steel bar connectors and the welding nail connectors are matched for arrangement, so that the construction of the shear connectors in the groove is more convenient, and the space for stretching the prestressed steel bundles by the groove according to the stress needs is reserved;
the transverse ribs are arranged at intervals below the prefabricated bent steel plates, so that the prefabricated steel structure part has better bidirectional bending rigidity, the deformation control of the steel plates in UHPC pouring is facilitated, and the bidirectional stress performance is better;
in conclusion, the invention has the advantages of light components, simple transportation and hoisting, convenient construction, full play of the stress performance of the material, good fatigue performance and good economy, and the application range comprises a simply supported beam bridge deck system, a continuous beam bridge deck system, a simply supported continuous beam bridge deck system or a stiffening beam bridge deck system of a cable support system bridge.
Drawings
In order to further explain the above objects, structural features and effects of the present invention, the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a perspective view of a preferred embodiment of the present invention;
FIG. 2 is a plan view of the preferred embodiment of the present invention (sectional view along the P-P direction in FIGS. 3, 5 and 6);
FIG. 3 is a cross-sectional view taken along the line A-A of FIG. 2 (no forward-bridging prestressed steel bundles are provided in the forward-bridging groove ribs);
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 2 (with a forward pre-stressed steel bundle disposed within the forward groove rib);
FIG. 5 is a cross-sectional view taken along line B-B of FIG. 2;
FIG. 6 is a cross-sectional view taken along line C-C of FIG. 2;
FIG. 7 is a cross-sectional view taken along line C1-C1 of FIG. 6;
in the figure: 0. a steel cross beam; 1. prefabricating a steel plate; 2. a forward bridge groove; 3. transverse bridge stiffening ribs; 4. an end sealing plate; 5. a transverse bridge direction groove; 6. reinforcing steel bar meshes; 7. ultra-high performance concrete with rib plates; 8. welding a nail connecting piece; 9. a reinforcing bar connecting piece; 10. and pre-stressing the steel beam along the bridge direction.
Detailed Description
The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
Referring to fig. 1 to 7, the light bridge deck plate of the ultra-high performance concrete and steel combined structure of the invention comprises a prefabricated steel plate 1, wherein the prefabricated steel plate 1 is bent and prefabricated to form a plurality of forward-bridge-direction grooves 2 which are arranged at intervals in the transverse bridge direction, the bottom surface of the prefabricated steel plate 1 is arranged with a plurality of transverse-bridge-direction stiffening ribs 3 at intervals in the forward bridge direction, the top surface of the prefabricated steel plate 1 is provided with a shear connector, and the forward-bridge-direction ends of the prefabricated steel plate 1 at two sides of the position of a steel beam 0 are provided with end sealing plates 4 so as to be connected with the steel beam 0. The prefabricated steel structure part of the combined bridge deck is hoisted in place, so that the end sealing plates 4 of the prefabricated steel structure part are lapped and placed on the top plate of the steel cross beam 0, are reliably connected with the top plate of the steel cross beam 0 through bolting or welding, and form transverse bridge direction grooves 5. And (3) pouring ultra-high performance concrete (UHPC) after the reinforcing mesh 6 is arranged on the top surface of the prefabricated steel plate 1, and forming a bidirectional rib plate (ultra-high performance concrete with rib plate 7) after the ultra-high performance concrete fills the forward-bridge-direction groove 2 and the transverse-bridge-direction groove 5 of the prefabricated steel plate 1, namely, the forward-bridge-direction groove 2 becomes a forward-bridge-direction groove rib, the transverse-bridge-direction groove 5 becomes a transverse-bridge-direction groove rib, and the transverse-bridge-direction groove rib is combined with the prefabricated steel plate 1 through a shear connector to form a combined bridge deck. The ultra-high performance concrete is normal temperature curing type ultra-high performance concrete or steam curing type ultra-high performance concrete, the axial tensile strength of the ultra-high performance concrete is 7-12 Mpa, the ultimate tensile strain of the ultra-high performance concrete is more than 2000 mu, and the total shrinkage strain of the ultra-high performance concrete in 28 days is 150-1000 mu. In concrete pouring, the ultra-high performance concrete is poured in situ or cast in situ partially, and the reinforcing mesh 6 can be prepared by prefabrication or site binding.
In the preferred embodiment, with continued reference to the figures, the shear connectors are stud connectors 8 and/or rebar connectors 9, the stud connectors 8 are disposed on the top surface of the preformed steel plate 1 and the bottom surface of the groove rib, and the rebar connectors 9 are disposed on the inner side walls of the groove of the forward-bridge groove 2. Specifically, the reinforcing bar connector 9 includes a set of reinforcing bar heads arranged at intervals, and one side of the reinforcing bar heads is welded with the inner side wall of the groove along the bridge direction groove 2. Further, the steel bar connecting piece 9 further comprises a longitudinal steel bar along the bridge direction, and the other side of the steel bar head is welded with the longitudinal steel bar along the bridge direction. The reinforcing steel bar head plays the connecting groove inside wall and is in the same direction as the bridge to the reinforcing steel bar, leaves the clearance in the same direction as the bridge to the reinforcing steel bar and is in the same direction as the groove inside wall between, and the UHPC's of being convenient for pour closely knit also provides better bonding grip for the reinforcing steel bar connecting piece.
The combined bridge deck slab is formed by connecting a prefabricated bending steel plate with an ultra-high performance concrete ribbed plate through a welding nail shear connector arranged on the top surface of the steel plate, a reinforcing steel bar net sheet 6 and a reinforcing steel bar shear connector arranged on the inner side wall of a groove along the bridge direction of the prefabricated steel plate 1 to form a combined section to be stressed jointly. The prefabricated steel plate 1 can be used as a construction platform of the ultra-high performance concrete bridge deck and the reinforcing steel bar net 6, and is convenient for construction of the ultra-high performance concrete bridge deck.
In a preferred embodiment, referring to FIG. 4, a forward-bridge prestressed steel bundle 10 can be arranged in the forward-bridge groove rib according to the stress requirement.
The ratio of the spacing of the forward bridge groove ribs to the span of the forward bridge groove ribs is preferably 1/3 to 1/4. The forward bridge groove rib is pressed in the positive bending moment area, the ultra-high performance concrete is tensioned, the lower flange of the forward bridge groove 2 of the prefabricated steel plate 1 is tensioned, and the force applied to the combined bridge deck is participated in through the shear connector, so that the crossing capacity of the forward bridge groove rib is improved; in the hogging moment section, the ultra-high-performance concrete of the bridge deck and the forward-bridge-oriented steel bars are pulled, the ultra-high-performance concrete in the grooves of the forward-bridge-oriented grooves 2 and the steel plates at the lower edges of the grooves of the forward-bridge-oriented grooves 2 are pressed, and the crossing capacity of the forward-bridge-oriented groove ribs can be further improved by improving the reinforcement ratio of the top edge forward-bridge-oriented steel bars or arranging the forward-bridge-oriented prestressed steel bundles 10 at the upper edges of the grooves of the forward-bridge-oriented grooves 2.
Further, the longitudinal section of the forward bridge groove 2 is rectangular or trapezoidal.
The concrete construction steps are as follows:
firstly, the prefabricated steel plate 1 is bent (the plate thickness can be 8 mm), the forward-bridge grooves 2 with the transverse-bridge-to-longitudinal spacing of about 1m are formed, the groove depth of the forward-bridge grooves 2 can be 120mm, the upper opening width of the grooves is 200mm, and the bending inner radius of the steel plate is 5 times the plate thickness (40 mm in this example). Welding nail shear connectors are welded on the top surface of the prefabricated steel plate 1 and the bottom surface of the groove, and steel bar shear connectors are arranged on the inner side wall of the groove so as to improve the connection performance between the prefabricated steel plate 1 and the post-cast ultra-high performance concrete slab. End sealing plates 4 are welded to the ends of the prefabricated steel panels 1 corresponding to the positions of the cross beams 0 so as to be connected with the outer steel cross beams 0. I-shaped transverse ribs (transverse bridge stiffening ribs 3) are arranged at equal intervals along the bridge direction of the prefabricated steel plate 1 so as to improve the transverse deformation resistance in the construction process (the arrangement interval of the transverse ribs can be 1m, the plate thickness of the steel plate is 10mm, and the rib height is 70 mm). Thus, the prefabricated steel structure part of the rib plate type ultra-high performance concrete and steel structure combined light bridge deck is prepared.
Secondly, the prefabricated steel structure part of the combined bridge deck is hoisted in place, so that the end sealing plates 4 of the prefabricated steel structure part are lapped and placed on a top plate of a steel beam 0 (the cross section of the steel beam 0 is box-shaped or I-shaped) (the steel beam 0 is welded or connected with the top plate through bolts or welded connection), the prefabricated steel structure part is reliably connected with the top plate of the steel beam 0 through bolting or welding, meanwhile, a transverse bridge groove 5 is formed, and the prefabricated steel plate 1 is used as a construction platform, and the steel bar net pieces 6 of the bridge deck are arranged.
Finally, taking the prefabricated steel plate 1 and the steel cross beam 0 as construction platforms, and determining whether the forward-bridge-direction prestress steel beam 10 is required to be arranged in the groove of the forward-bridge-direction groove 2 according to stress requirements; pouring ultra-high performance concrete, forming ultra-high performance concrete slab ribs between the grooves of the forward-bridge direction grooves 2 of the prefabricated steel plates 1 and the transverse-bridge direction grooves 5 formed by the end sealing plates 4 and the top plate of the steel cross beam 0, wherein the thickness of an ultra-high performance concrete slab at the flange section is generally 80mm, the height of the ultra-high performance concrete rib at the ribbed position is 200mm, and the ultra-high performance concrete rib-carrying plate forms a combined bridge deck with cooperative stress through the welding nail connecting pieces 8 of the prefabricated steel plates 1 and the top plate of the steel cross beam 0 and the steel bar connecting pieces 9 of the inner side walls of the forward-bridge direction grooves 2 and the steel structure. The top plate of the steel beam 0 is used as a supporting point, the combined bridge deck plate forms a continuous system in the forward bridge direction, and the structural dimension of the example is taken as an example, and the application span range of the combined bridge deck plate is 3-4 m.
The invention can effectively exert the high tensile strength and the ultrahigh toughness of UHPC materials in the combined structure, simultaneously exert the tensile properties of the prefabricated steel plate 1 and the reinforcing steel mesh 6, reduce the consumption of UHPC and steel plates in the structure, improve the economy of the structure, and has the following working principle: the combined bridge deck is a continuous structure continuously supported on the steel cross beam 0, the applicable span of the combined bridge deck is about 3-4 m, and the structural size of the combined bridge deck can be adjusted according to the arrangement of the steel cross beam 0. Because the bridge width is generally larger (more than 2 times of the span of the combined bridge deck), the combined bridge deck has the stress characteristics that the combined bridge deck is generally a forward one-way plate: the steel beam 0 is stressed by a negative bending moment, and the middle span of the steel beam 0 is stressed by a positive bending moment. The prefabricated steel plate 1 is bent into the forward-direction groove 2, so that the forward rigidity during construction can be increased, the rib plates are formed after the ultra-high performance concrete is filled, the bending-resistant section height of the combined bridge deck is improved, the bending rigidity and bending-resistant bearing capacity of the combined bridge deck are further enhanced, and the crossing capacity of the combined bridge deck is improved. In the positive bending moment stress section, the prefabricated steel plate 1 is used as a tension flange, so that the tensile strength of the composite bridge deck ultra-high performance concrete lower edge reinforcement can be fully exerted, the height of UHPC rib plates is reduced, the dead weight of the composite bridge deck is further reduced, and meanwhile, the advantage of high compressive strength of the UHPC can be fully exerted on the compression side. In the hogging moment stressed section at the steel beam 0, the tensile capacity of the upper edge tension zone is jointly born by UHPC and the top edge reinforcing steel meshes. In the aspect of shearing resistance, the steel bar connecting pieces 9 arranged along the bridge of the prefabricated steel plate 1 to the inner side wall of the groove 2 can effectively connect the side wall of the steel plate with UHPC post-cast plate ribs so as to bear the centralized shearing force longitudinal transmission of the vehicle wheel load together; the reinforcement heads (the diameter is recommended to be 20mm, the forward length is recommended to be 50mm, and the interval is 200 mm) arranged in the reinforcement connector 9 at intervals can realize the shearing connection between the side wall of the connecting groove and the forward-bridge reinforcement, and simultaneously is beneficial to the pouring compaction of UHPC. The end sealing plates 4 are lapped and placed on the top plate of the steel beam 0 (welding nail connecting pieces 8 are arranged on the top plate of the steel beam 0) to form transverse bridge grooves 5, transverse UHPC ribs are formed after UHPC is poured, the transverse UHPC ribs and the steel beam 0 form combined section stress, and meanwhile reliable connection of a combined bridge deck system and the beam is realized.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the embodiments and scope of the present invention, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included in the scope of the present invention.
Claims (8)
1. The utility model provides a light bridge deck plate of ultra-high performance concrete and steel integrated configuration, its characterized in that, including prefabricated steel sheet, prefabricated steel sheet buckles prefabricates and forms a plurality of along bridge to recess to interval arrangement of transverse bridge, the bottom surface of prefabricated steel sheet is along bridge to interval arrangement a plurality of transverse bridge to stiffening rib, the top surface of prefabricated steel sheet is equipped with the shear force connecting piece, the along bridge to both sides tip of prefabricated steel sheet is equipped with the end shrouding, prefabricated steel sheet hoist and mount to bridge deck system steel beam top surface, the end shrouding forms transverse bridge to the recess with steel beam roof the top surface of prefabricated steel sheet sets up the reinforcing bar net piece after pour ultra-high performance concrete, ultra-high performance concrete fills along bridge to the recess of prefabricated steel sheet and form respectively behind the transverse bridge to recess rib and transverse bridge to recess rib, and pass through the shear force connecting piece with the prefabricated steel sheet combines to form the integrated configuration bridge deck plate.
2. The ultra-high performance concrete and steel composite structure light bridge deck according to claim 1, wherein the shear connectors are welded pin connectors and/or steel bar connectors, the welded pin connectors are arranged on the top surface of the prefabricated steel plate and the bottom surface of the groove rib, and the steel bar connectors are arranged on the inner side wall of the groove rib.
3. The ultra-high performance concrete and steel composite structure lightweight bridge deck according to claim 2, wherein said rebar junction comprises a set of spaced rebar heads, one side of said rebar heads being welded to the inside groove wall of said forward-facing groove.
4. The ultra-high performance concrete and steel composite structure lightweight bridge deck according to claim 3, wherein said steel bar connector further comprises a forward-bridge-to-through-length steel bar, and the other side of said steel bar head is welded to said forward-bridge-to-through-length steel bar.
5. The ultra-high performance concrete and steel composite structure light bridge deck according to claim 1, wherein the ultra-high performance concrete is normal temperature curing ultra-high performance concrete or steam curing ultra-high performance concrete, the axial tensile strength of the ultra-high performance concrete is 7-12 Mpa, the ultimate tensile strain of the ultra-high performance concrete is more than 2000 mu, and the 28-day total shrinkage strain of the ultra-high performance concrete is 150-1000 mu.
6. The ultra-high performance concrete and steel composite structure light bridge deck according to claim 1, wherein the forward bridge direction prestress steel bundles are arranged in the forward bridge direction groove ribs according to the stress requirement.
7. The ultra-high performance concrete and steel composite structure lightweight bridge deck according to claim 1, wherein the ratio of the spacing of the forward-bridge-oriented groove ribs to the span of the forward-bridge-oriented groove ribs is 1/3 to 1/4.
8. The ultra-high performance concrete and steel composite structure lightweight bridge deck according to claim 1, wherein the longitudinal section of the forward-bridge groove is rectangular or trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310618645.0A CN116695563A (en) | 2023-05-29 | 2023-05-29 | Light bridge deck of ultra-high performance concrete and steel combined structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310618645.0A CN116695563A (en) | 2023-05-29 | 2023-05-29 | Light bridge deck of ultra-high performance concrete and steel combined structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116695563A true CN116695563A (en) | 2023-09-05 |
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ID=87835052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310618645.0A Pending CN116695563A (en) | 2023-05-29 | 2023-05-29 | Light bridge deck of ultra-high performance concrete and steel combined structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116695563A (en) |
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2023
- 2023-05-29 CN CN202310618645.0A patent/CN116695563A/en active Pending
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