CN210031457U - Corrugated steel web-truss type chord UHPC combined box girder - Google Patents
Corrugated steel web-truss type chord UHPC combined box girder Download PDFInfo
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- CN210031457U CN210031457U CN201920722726.4U CN201920722726U CN210031457U CN 210031457 U CN210031457 U CN 210031457U CN 201920722726 U CN201920722726 U CN 201920722726U CN 210031457 U CN210031457 U CN 210031457U
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Abstract
The utility model relates to a wave form steel web-truss chord member UHPC combination case roof beam, including waffle formula UHPC decking, waffle formula UHPC decking's below is equipped with two steel core concrete lower chords that extend along its length direction, connects the web member through a plurality of root trusses between the adjacent steel core concrete lower chord and connects as an organic wholely, and steel core concrete lower chord is all connected as an organic wholely through wave form steel web and waffle formula UHPC decking and is in order to form the case roof beam, and the inside diaphragm plate that is equipped with of case roof beam, case roof beam both ends all are equipped with the end diaphragm, all are equipped with the maintenance opening on the end diaphragm plate. The corrugated steel web-truss chord UHPC combined box girder has a simple structure.
Description
Technical Field
The utility model relates to a wave form steel web-truss-like chord member UHPC combination case roof beam relates to ultra high performance concrete, bridge engineering and steel-concrete integrated configuration field.
Background
The traditional PC combined box girder with the steel web members is mainly characterized by axial stress of steel truss members, and the steel truss structure has the advantages of high rigidity, high bearing capacity, attractive appearance and the like, and is one of the common structural forms of modern bridges. Compared with the traditional PC box girder, the proportion of the structure dead load effect to all effects can be reduced by 60-80%, so that the spanning capability and the economic performance of the steel web member PC combined box girder are greatly improved, and the load of a lower structure is reduced. However, in the construction process and the operation process, two main problems exist: firstly, the concrete pouring of the bottom plate is troublesome, the pouring space at the joint of the web member and the bottom plate is small, and the concrete pouring quality cannot be controlled; secondly, the composite beam bridge deck is easy to crack under the action of external load, and particularly in a positive bending moment area, the rigidity, the bearing capacity and the durability of the structure are seriously influenced.
Based on the above problems, researchers propose a design concept of forming a steel tube (concrete filled steel tube) composite beam by replacing a steel web member PC box beam concrete bottom plate with a steel tube or a concrete filled steel tube chord member on the basis of the steel web member PC composite box beam, and specific structural forms can be divided into three types, namely a steel tube composite truss beam, a concrete filled steel tube composite truss beam and a concrete filled steel tube-corrugated steel web composite beam. The steel pipe combined truss girder structure has the advantages of light self weight, low cost, simple and convenient erection and the like, thereby being widely applied to middle and small span bridge engineering. And filling concrete into the lower chord steel pipe of the steel pipe combined truss girder to form the steel pipe concrete combined truss girder. The self weight of the steel tube concrete combined truss girder is slightly increased due to the fact that the lower chord steel tube is filled with concrete, the radial rigidity of the chord member node is improved, and meanwhile the integral rigidity and the bearing capacity of the structure are improved. However, as the height of the steel pipe concrete composite truss girder is increased, the node structure and the stress condition are complex, and the unfavorable condition that the local damage of the node controls the whole bearing capacity of the structure is easy to occur, so that the bearing capacity of the structure is often dependent on the node bearing capacity, the combination effect and the whole resistance cannot be fully exerted, the bearing capacity is low, and the deformation performance is poor.
SUMMERY OF THE UTILITY MODEL
In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a corrugated steel web-truss chord UHPC combined box girder.
In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a wave form steel web-truss chord member UHPC combination case roof beam, including waffle formula UHPC decking, waffle formula UHPC decking's below is equipped with two steel pipe concrete lower chords that extend along its length direction, connect the web member through a plurality of trusses between the adjacent steel pipe concrete lower chord and connect as an organic wholely, steel pipe concrete lower chord all is connected as an organic wholely through wave form steel web and waffle formula UHPC decking in order to form the case roof beam, the inside diaphragm plate that is equipped with of case roof beam, case roof beam both ends all are equipped with the end diaphragm plate, all be equipped with the maintenance opening on the end diaphragm plate.
Preferably, the concrete filled steel tube lower chord and the truss type connecting web members all comprise steel tubes, and common strong concrete is filled in the steel tubes of the concrete filled steel tube lower chord.
Preferably, the steel pipe concrete lower chords are symmetrically distributed on two sides below the waffle type UHPC bridge deck by taking the central line of the waffle type UHPC bridge deck as a symmetry axis; and the two corrugated steel webs are symmetrically distributed between the waffle UHPC bridge deck and the concrete-filled steel tube lower chord by taking the central line of the waffle UHPC bridge deck as a symmetry axis.
Preferably, embedded shear pieces are arranged at the joints of the corrugated steel web and the waffle type UHPC bridge deck, each embedded shear piece comprises a steel bar fixed on two sides of the top end of the corrugated steel web through anchoring bolts, each steel bar extends along the length direction of the waffle type UHPC bridge deck, a plurality of through steel bars are uniformly distributed below the steel bar of the corrugated steel web along the length direction, the through steel bars and the steel bars of the waffle type UHPC bridge deck are bound or welded into a whole, and the steel bars and the through steel bars are embedded into the waffle type UHPC bridge deck during pouring.
Preferably, the bottom of the corrugated steel web plate is welded with the concrete filled steel tube lower chord on the same side of the corrugated steel web plate, and the plurality of truss-type connecting web members are welded with the concrete filled steel tube lower chord.
Preferably, the middle diaphragm plate and the end diaphragm plate are located in a space surrounded by the waffle UHPC bridge deck, the two corrugated steel web plates and the two steel pipe concrete lower chords and are fixedly integrated with the waffle UHPC bridge deck, the two corrugated steel web plates and the two steel pipe concrete lower chords.
Compared with the prior art, the utility model discloses following beneficial effect has: the corrugated steel web plate-truss chord UHPC combined box girder is simple in structure, the rigidity of the middle diaphragm plate and the end diaphragm plates is high, the bearing capacity is high, the overall performance of the box girder can be ensured, and the corrugated steel web plate-truss chord UHPC combined box girder has enough torsional rigidity to reduce the overall torsional distortion effect; the bridge deck is designed in a waffle mode, so that the bearing efficiency is higher than that of the traditional rectangular cross section, and the load distribution capacity is good; the ultra-high-strength corrugated steel plate has the advantages of simple construction, short construction period, high operability, strong applicability, easiness in popularization in the field of existing bridges, wide application range and the like.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a view showing the internal structure of the middle diaphragm.
FIG. 3 is a view showing the internal structure of the end diaphragms.
FIG. 4 is a structural diagram of the connection of two ends of a corrugated steel web.
Fig. 5 is a diagram of a buried shear member configuration.
Fig. 6 is a diagram of a stand construction.
Detailed Description
In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1-6, a corrugated steel web-truss chord UHPC combined box girder comprises a waffle UHPC bridge deck 1, two concrete-filled steel tube lower chords 2 extending along the length direction of the waffle UHPC bridge deck are arranged below the waffle UHPC bridge deck, adjacent concrete-filled steel tube lower chords are connected into a whole through a plurality of truss-type connecting web members 3, the concrete-filled steel tube lower chords are connected with the waffle UHPC bridge deck into a whole through corrugated steel webs 13 to form a box girder, a middle transverse partition plate 4 is arranged inside the box girder, end transverse partition plates 5 are arranged at two ends of the box girder, and maintenance through holes 6 are arranged on the end transverse partition plates.
In the embodiment of the present invention, in the waffle-type UHPC bridge deck, UHPC is an abbreviation of ultra high Performance Concrete (ultra high Performance Concrete), which means a generic name of a cement-based composite material having a compressive strength of more than 150MPa and having ultra high toughness and ultra long durability. The main characteristics are as follows: the grading of the composition material particles reaches the optimal cement-based composite material; the water-gel ratio is less than 0.25, and the high proportion of the superfine short steel fiber reinforced material is contained; the compressive strength is not lower than 150 MPa; the material has toughness in a tensile state, and the tensile strength is still kept to be not less than 7MPa after cracking; the interior of the concrete has a non-connected through hole structure, and the concrete has high air and liquid immersion resistance, and compared with traditional concrete and High Performance Concrete (HPC), the durability of the concrete is greatly improved. The waffle type bridge deck is in the prior art, namely the lower surface of the bridge deck is provided with a plurality of cavities 7 which are arranged in an array manner, the cross section size of the waffle type bridge deck is reduced, the structure dead weight is favorably reduced, the durability is high, the later maintenance is facilitated, and the waffle type bridge deck has high spanning capability and economic performance. The waffle type UHPC bridge deck, the middle diaphragm plate and the end diaphragm plate are all manufactured by adopting a method of casting UHPC on site, and the UHPC plate contains steel fibers, so that the UHPC bridge deck has better deformation performance, can deform in cooperation with the corrugated steel web plate, and has an energy consumption effect under the action of an earthquake.
The embodiment of the utility model provides an in, the web member is connected with the purlin to the concrete filled steel tube lower chord member all includes the steel pipe, and wherein the inside packing of steel pipe of concrete filled steel tube lower chord member has ordinary strong concrete 8, and the web member is connected to the purlin formula adopts ordinary seamless empty steel pipe, and its specification satisfies the designing requirement of seamless steel pipe can.
In the embodiment of the utility model, the steel pipe concrete lower chord takes the central line of the waffle type UHPC bridge deck as the symmetry axis and is symmetrically distributed on the two sides below the waffle type UHPC bridge deck; and the two corrugated steel webs are symmetrically distributed between the waffle UHPC bridge deck and the concrete-filled steel tube lower chord by taking the central line of the waffle UHPC bridge deck as a symmetry axis.
The embodiment of the utility model provides an in, the junction of wave form steel web and waffle formula UHPC decking all is provided with buries formula shear force spare, avoids the structure to take place local segment and destroys, bury formula shear force spare and all include through anchor peg 9 fix the bar steel 10 in wave form steel web top both sides, the length direction that the bar steel all followed waffle formula UHPC decking extends, wave form steel web all has a plurality of roots along the length direction equipartition in the below of bar steel and link up reinforcing bar 11, a plurality of roots link up reinforcing bar and waffle formula UHPC decking's reinforcement or welding as an organic whole, when pouring the bar steel, link up the reinforcing bar and all bury waffle formula UHPC decking.
The embodiment of the utility model provides an in, corrugated steel web's bottom and the concrete filled steel tube lower chord welded connection of homonymy, a plurality of trusses are connected web member and concrete filled steel tube lower chord welded connection, avoid the structure to take place local festival section and destroy.
The embodiment of the utility model provides an in, well cross slab all is located the space that waffle formula UHPC decking, two wave form steel web, two steel pipe concrete lower chords enclose with end cross slab to set firmly as an organic whole with waffle formula UHPC decking, two wave form steel web, two steel pipe concrete lower chords.
A construction method of a corrugated steel web-truss chord UHPC combined box girder comprises the following steps: (1) welding and forming the steel tube concrete lower chord member and the steel tube of the truss type connecting web member, further welding the lower end of the corrugated steel web plate and the steel tube of the steel tube concrete lower chord member according to a design angle, and filling the concrete of the steel tube concrete lower chord member after the quality of a welding seam is checked, wherein the specification of the concrete of the steel tube concrete lower chord member meets the design requirement of the steel tube concrete; (2) installing a lower steel template of the waffle UHPC bridge deck, positioning the upper end of a corrugated steel web plate by penetrating through the steel template, and connecting a through steel bar with a steel bar mesh inside the waffle UHPC bridge deck; (3) binding the steel bar meshes in the end diaphragm plates and the middle diaphragm plates, reserving an overhaul port at the position of the end diaphragm plate, and integrally pouring the end diaphragm plates, the middle diaphragm plates and the waffle type UHPC bridge deck plate in sequence; (4) after the UHPC strength reaches 30% of the design strength, the steel template at the bottom of the bridge deck, the end diaphragm plate and the middle diaphragm plate template can be disassembled; finally, the corrugated steel web plate-truss chord UHPC combined box girder is placed on the girder bottom steel base 12
In the embodiment of the present invention, in step (2), the steel form is a pressed steel plate, so as to form a waffle-type UHPC bridge deck when pouring.
In the embodiment of the present invention, in step (3), the corrugated steel web and the truss-type connecting web members are provided with openings 14 for the steel mesh in the end diaphragm plates and the middle diaphragm plates to pass through, and the steel mesh 15 around the openings needs to be encrypted.
The utility model discloses from the design, the construction, the maintenance stage is started, the unfavorable condition and the conventional concrete bridge deck slab of the whole bearing capacity of concrete filled steel tube combination truss beam node local destruction control structure and the problem that wave form steel web can not warp in coordination have been solved fundamentally, after adopting this kind of method measure promptly, will effectively avoid truss type node local inefficacy and concrete slab fracture, the shortcoming such as whole atress performance is poor and maintenance cost height, and reduce maintenance time by a wide margin and save a large amount of manpowers and material resources, the life cycle of bridge has been improved simultaneously.
The present invention is not limited to the above best mode, and any person can obtain the corrugated steel web-truss chord UHPC combined box girder in various forms. All the equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.
Claims (6)
1. The utility model provides a wave form steel web-truss-like chord member UHPC combination case roof beam which characterized in that: including waffle formula UHPC decking, waffle formula UHPC decking's below is equipped with two steel pipe concrete lower chords that extend along its length direction, connect as an organic whole through a plurality of trusses between the adjacent steel pipe concrete lower chord, steel pipe concrete lower chord all is connected as an organic whole through wave form steel web and waffle formula UHPC decking in order to form the case roof beam, the inside diaphragm plate that is equipped with of case roof beam, case roof beam both ends all are equipped with the end diaphragm plate, all are equipped with the maintenance opening on the end diaphragm plate.
2. The corrugated steel web-truss chord UHPC combined box girder of claim 1, wherein: the steel pipe concrete lower chord member and the truss type connecting web members all comprise steel pipes, wherein the steel pipes of the steel pipe concrete lower chord member are filled with common strong concrete.
3. The corrugated steel web-truss chord UHPC combined box girder of claim 1, wherein: the steel pipe concrete lower chords are symmetrically distributed on two sides below the waffle UHPC bridge deck by taking the central line of the waffle UHPC bridge deck as a symmetry axis; and the two corrugated steel webs are symmetrically distributed between the waffle UHPC bridge deck and the concrete-filled steel tube lower chord by taking the central line of the waffle UHPC bridge deck as a symmetry axis.
4. The corrugated steel web-truss chord UHPC combined box girder of claim 1, wherein: the embedded shear pieces are arranged at the joints of the corrugated steel web and the waffle type UHPC bridge deck, each embedded shear piece comprises a bar steel fixed on two sides of the top end of the corrugated steel web through anchoring bolts, each bar steel extends along the length direction of the waffle type UHPC bridge deck, a plurality of through reinforcing steel bars are uniformly distributed below the bar steel of the corrugated steel web along the length direction, the through reinforcing steel bars and the reinforcing steel bars of the waffle type UHPC bridge deck are bound or welded into a whole, and the bar steel and the through reinforcing steel bars are embedded into the waffle type UHPC bridge deck during pouring.
5. The corrugated steel web-truss chord UHPC combined box girder of claim 1, wherein: the bottom of the corrugated steel web plate is welded with the concrete filled steel tube lower chord on the same side of the corrugated steel web plate, and the plurality of truss type connecting web members are welded with the concrete filled steel tube lower chord.
6. The corrugated steel web-truss chord UHPC combined box girder of claim 1, wherein: and the middle diaphragm plate and the end diaphragm plate are positioned in a space surrounded by the waffle UHPC bridge deck, the two corrugated steel web plates and the two steel pipe concrete lower chords and are fixedly integrated with the waffle UHPC bridge deck, the two corrugated steel web plates and the two steel pipe concrete lower chords.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920722726.4U CN210031457U (en) | 2019-05-20 | 2019-05-20 | Corrugated steel web-truss type chord UHPC combined box girder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920722726.4U CN210031457U (en) | 2019-05-20 | 2019-05-20 | Corrugated steel web-truss type chord UHPC combined box girder |
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| CN210031457U true CN210031457U (en) | 2020-02-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029569A (en) * | 2019-05-20 | 2019-07-19 | 福州大学 | A kind of Wavelike steel webplate-purlin formula chord member UHPC combined box beam and its construction method |
| CN112853916A (en) * | 2021-03-09 | 2021-05-28 | 甘肃畅陇公路养护技术研究院有限公司 | Assembled waffle bridge panel combined box girder structure and construction method thereof |
| CN114319082A (en) * | 2022-01-19 | 2022-04-12 | 山东高速集团有限公司创新研究院 | Steel-UHPC composite beam structure |
| CN114922043A (en) * | 2022-05-27 | 2022-08-19 | 武汉大学 | Box girder and box girder bridge |
-
2019
- 2019-05-20 CN CN201920722726.4U patent/CN210031457U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029569A (en) * | 2019-05-20 | 2019-07-19 | 福州大学 | A kind of Wavelike steel webplate-purlin formula chord member UHPC combined box beam and its construction method |
| CN110029569B (en) * | 2019-05-20 | 2023-12-08 | 福州大学 | Corrugated steel web-truss chord UHPC combined box girder and construction method thereof |
| CN112853916A (en) * | 2021-03-09 | 2021-05-28 | 甘肃畅陇公路养护技术研究院有限公司 | Assembled waffle bridge panel combined box girder structure and construction method thereof |
| CN114319082A (en) * | 2022-01-19 | 2022-04-12 | 山东高速集团有限公司创新研究院 | Steel-UHPC composite beam structure |
| CN114319082B (en) * | 2022-01-19 | 2023-07-04 | 山东高速集团有限公司创新研究院 | Steel-UHPC composite beam structure |
| CN114922043A (en) * | 2022-05-27 | 2022-08-19 | 武汉大学 | Box girder and box girder bridge |
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Granted publication date: 20200207 |
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