CN211897803U - Continuous new structure of composite beam structure adopting UHPC beam-steel end plate with studs - Google Patents
Continuous new structure of composite beam structure adopting UHPC beam-steel end plate with studs Download PDFInfo
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- CN211897803U CN211897803U CN202020166429.9U CN202020166429U CN211897803U CN 211897803 U CN211897803 U CN 211897803U CN 202020166429 U CN202020166429 U CN 202020166429U CN 211897803 U CN211897803 U CN 211897803U
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Abstract
The utility model relates to an adopt continuous new construction of combination beam structure of UHPC crossbeam-area bolt nail steel end plate includes first girder steel, second girder steel that first end is close to each other, establishes temporary support, permanent support and substructure below first end. Vertical studs are distributed on the upper surfaces of the first steel beam and the second steel beam, steel end plates are fixed on first ends of the first steel beam and the second steel beam respectively, horizontal studs are distributed on opposite surfaces of the two steel end plates respectively, a UHPC beam is poured in a space defined by the opposite surfaces of the two steel end plates and the upper end surface of the permanent support, a section UHPC bridge panel layer is respectively extended and poured from the upper part of the UHPC beam to the upper surfaces of the first steel beam and the second steel beam, and reinforced concrete bridge panel layers are respectively poured on the upper surfaces of the first steel beam and the second steel beam at the sides of the UHPC bridge panel layer; the utility model provides a continuous beam hogging moment district concrete slab easy cracking problem and convenient construction, improve economic nature.
Description
The technical field is as follows:
the utility model relates to a continuous new structure of a combined beam structure adopting a UHPC beam-steel end plate with studs.
Background art:
in recent years, steel-concrete composite beams are widely applied to engineering practice, have many advantages compared with traditional concrete beams and steel beams, fully utilize the characteristics of steel and concrete and have great advantages in material structure; however, the steel-concrete composite continuous beam bridge has a large negative bending moment at the support, the concrete bridge deck is easy to crack due to large tensile stress, the concrete slab in the negative bending moment area exits from working due to cracking, the rigidity of the composite beam is weakened, and if the crack is large, harmful substances can penetrate into the concrete through the crack, so that the steel bar is seriously corroded and corroded, the durability of the composite beam is reduced, and the difficulty in maintenance work is increased; secondly, the construction method of the steel-concrete composite beam bridge is generally that a steel main beam is prefabricated in a precast yard, then welded and assembled on site, the steel main beam is erected, and finally a concrete bridge deck is poured; meanwhile, in order to improve stability and torsion resistance of the girder, a transverse stiffener is generally provided at the pedestal to maintain local stability of the girder and transmit a pedestal reaction force, and a large amount of welding work causes uneconomical performance of the composite girder bridge.
The invention content is as follows:
the utility model aims at providing an adopt continuous new construction of combination beam structure of UHPC crossbeam-area bolt nail steel end plate promptly, this adopt continuous new construction of combination beam structure of UHPC crossbeam-area bolt nail steel end plate be favorable to solving the concrete slab problem of easily cracking and the convenient construction in steel-concrete combination continuous beam hogging moment district, improve economic nature.
The utility model discloses a continuous new construction of combination beam structure of UHPC crossbeam-area bolt nail steel end plate, its characterized in that: including first girder steel, the second girder steel that first end is close to each other, establish temporary support, permanent support and substructure below first end, vertical peg has been laid to the upper surface of first girder steel and second girder steel, be fixed with the steel end plate on the first end of first girder steel and second girder steel respectively, laid the level respectively on the opposite face of two steel end plates and to the peg, pour the UHPC crossbeam in the space that the opposite face of two steel end plates and permanent support up end enclose, a section UHPC bridge panel layer has been extended respectively to first girder steel and second girder steel upper surface to this UHPC crossbeam upper portion, and the side that lies in UHPC bridge panel layer on the upper surface of first girder steel and second girder steel has pour reinforced concrete bridge panel layer respectively.
Furthermore, the vertical pin and the horizontal pin are both cylindrical head pins.
Furthermore, above-mentioned vertical peg, steel end plate and level are all prefabricated the formation to peg and first girder steel or second girder steel.
Further, the distance between the two steel end plates on the first steel beam and the second steel beam is smaller than the width of the upper end of the lower structure.
The utility model welds the vertical stud on the upper surface of the steel beam in the hogging moment area of the steel-concrete combined continuous beam and pours the UHPC bridge deck; and the problem that the concrete slab in the hogging moment area of the steel-concrete combined continuous beam is easy to crack is solved by connecting the adjacent steel-concrete combined beam through the steel end plate, the horizontal stud and the UHPC cross beam. Under the action of vertical load, the steel end plate of the steel-concrete composite beam transfers the pressure of the flange of the lower steel beam to the UHPC cross beam, and the UHPC cross beam and the UHPC bridge deck plate resist the upper surface tension of the hogging moment area of the steel-concrete composite continuous beam. In addition, the shear load is transmitted to the stud horizontally by welding on the steel end plate, and the requirement on mechanical property can be met. Thereby avoiding the generation and the development of cracks in the hogging moment area of the steel-concrete combined continuous beam. Meanwhile, the steel end plates, the horizontal studs and the UHPC cross beams are adopted to connect adjacent steel-concrete composite beams, so that the construction is simple and convenient.
The utility model adopts a construction method of a continuous new structure of a combined beam structure of a UHPC beam-steel end plate with a bolt nail, wherein the continuous new structure of the combined beam structure adopting the UHPC beam-steel end plate with the studs comprises a first steel beam and a second steel beam with first end heads close to each other, a temporary support arranged below the first end heads, a permanent support and a lower structure, vertical studs are distributed on the upper surfaces of the first steel beam and the second steel beam, steel end plates are respectively fixed on the first ends of the first steel beam and the second steel beam, horizontal studs are respectively distributed on the opposite surfaces of the two steel end plates, a UHPC beam is poured in a space enclosed by the opposite surfaces of the two steel end plates and the upper end surface of the permanent support, a section UHPC bridge deck layer is respectively extended and poured from the upper part of the UHPC cross beam to the upper surfaces of the first steel beam and the second steel beam, reinforced concrete bridge deck layers are respectively poured beside the UHPC bridge deck layers on the upper surfaces of the first steel beam and the second steel beam;
the construction steps are as follows:
(1) the construction of a substructure, the establishment and installation of temporary and permanent supports.
(2) Prefabricating a first steel beam and a second steel beam, welding steel end plates at the end parts of the first steel beam and the second steel beam, welding vertical studs on the upper surfaces of the first steel beam and the second steel beam, welding horizontal studs on the outer surfaces of the steel end plates of the first steel beam and the second steel beam, and installing, debugging and hoisting equipment;
(3) hoisting a first steel beam and a second steel beam of the strip steel end plate, the vertical stud and the horizontal stud; lay first girder steel and second girder steel on the temporary support, the structure is simply supported state this moment.
(4) Welding the transverse connection of the first steel beam and the second steel beam, using the first steel beam and the second steel beam as supports, erecting a template, respectively pouring reinforced concrete bridge deck layers on the upper surfaces of the first steel beam and the second steel beam, wherein a gap is formed between the two poured reinforced concrete bridge deck layers;
(5) and a UHPC bridge deck layer is poured in the space between the two poured reinforced concrete bridge deck layers at the two sides, and a UHPC cross beam is poured in the space enclosed by the opposite surfaces of the two steel end plates and the upper end surface of the permanent support.
(6) And (5) dismantling the temporary support to finish system conversion and organize the bridge deck system construction.
The utility model has the advantages that the vertical stud is welded on the upper surface of the steel beam in the hogging moment area of the steel-concrete combined continuous beam and the UHPC bridge deck is poured; the adjacent steel-concrete combined beams are connected through the steel end plates, the horizontal studs and the UHPC cross beam, the connecting mode is simple in structural form, clear in stress, suitable in rigidity and good in anti-seismic performance, the steel-concrete combined beams can be structurally continuous without being welded, and the construction cost and the construction period are greatly saved; the UHPC has good tensile property, and can avoid the generation and development of cracks of a reinforced concrete bridge deck slab in a hogging moment area for a steel-concrete continuous beam bridge; meanwhile, the UHPC reduces the thickness of the concrete beam and lightens the self weight of the bridge.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention;
2-7 are the structure schematic diagrams of the construction process of the utility model;
FIG. 8a is a front view of the first steel beam or the second steel beam;
FIG. 8b is a top view of the first steel beam or the second steel beam;
FIG. 8c is a left side view of FIG. 8 a;
FIG. 8d is a right side view of FIG. 8 a;
the reference numbers in the figures illustrate: the steel beam-1, the first steel beam-101, the second steel beam-102, the vertical stud-3, the reinforced concrete bridge deck, the UHPC bridge deck-4, the steel end plate-5, the horizontal stud-6, the UHPC cross beam-7, the permanent support-8, the temporary support-9, and the substructure-10.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The utility model adopts a continuous new structure of a combined beam structure of a UHPC beam and a steel end plate with a bolt nail, which comprises a first steel beam 101, a second steel beam 102, a temporary support 9, a permanent support 8 and a substructure 10, wherein the first end A is close to the second end A, vertical studs 2 are distributed on the upper surfaces of the first steel beam 101 and the second steel beam 102, steel end plates 5 are respectively fixed on the first ends A of the first steel beam 101 and the second steel beam 102, horizontal studs 6 are respectively distributed on the opposite surfaces of the two steel end plates, a UHPC beam 7 is poured in a space enclosed by the opposite surfaces of the two steel end plates and the upper end surface of the permanent support, a section UHPC bridge deck slab layer 4 is respectively extended and poured from the upper part of the UHPC cross beam 7 to the upper surfaces of the first steel beam and the second steel beam, and reinforced concrete bridge deck layers 3 are respectively poured beside the UHPC bridge deck layer 4 on the upper surfaces of the first steel beam 101 and the second steel beam 102.
Furthermore, in order to enable the reinforced concrete bridge deck layer 3, the UHPC bridge deck layer 4 and the UHPC cross beam 7 to be firmly connected with the first steel beam 101 and the second steel beam 102, the vertical toggle pins and the horizontal toggle pins are cylindrical head toggle pins, the small ends of the cylindrical head toggle pins are welded and fixed on the first steel beam 101 or the second steel beam 102, the distance between every two cylindrical head toggle pins is 10-15 cm, and the height of the cylindrical head toggle pins is 10-15 cm.
Further, for reasonable design, a lower structure 10, a permanent support 8 on the upper surface of the lower structure and a temporary support 9 are arranged, the lower structure 10 is an existing conventional reinforced concrete structure, the permanent support 8 can be a steel support or a rubber support, and the temporary support 9 can be a concrete cushion block.
Further, for convenience and quickness, the vertical stud, the steel end plate and the horizontal stud are all formed by prefabricating and welding in a factory with the first steel beam or the second steel beam, and only the stud is required to be lifted and installed and poured in the field, so that the construction time can be greatly saved.
Further, for good support, the distance between the two steel end plates on the first steel beam and the second steel beam is smaller than the width of the upper end of the lower structure.
The utility model adopts a construction method of a continuous new structure of a combined beam structure of a UHPC beam-steel end plate with a bolt nail, wherein the continuous new structure of the combined beam structure adopting the UHPC beam-steel end plate with the studs comprises a first steel beam and a second steel beam with first end heads close to each other, a temporary support arranged below the first end heads, a permanent support and a lower structure, vertical studs are distributed on the upper surfaces of the first steel beam and the second steel beam, steel end plates are respectively fixed on the first ends of the first steel beam and the second steel beam, horizontal studs are respectively distributed on the opposite surfaces of the two steel end plates, a UHPC beam is poured in a space enclosed by the opposite surfaces of the two steel end plates and the upper end surface of the permanent support, a section UHPC bridge deck layer is respectively extended and poured from the upper part of the UHPC cross beam to the upper surfaces of the first steel beam and the second steel beam, reinforced concrete bridge deck layers are respectively poured beside the UHPC bridge deck layers on the upper surfaces of the first steel beam and the second steel beam;
the construction steps are as follows:
(1) the construction of the substructure 10, the establishment and installation of the temporary 9 and permanent 8 supports (as shown in fig. 2);
(2) prefabricating a first steel beam 101 and a second steel beam 102, welding steel end plates 5 at the end parts of the first steel beam and the second steel beam, welding vertical studs 2 on the upper surfaces of the first steel beam and the second steel beam, welding horizontal studs 6 on the outer surfaces of the steel end plates of the first steel beam and the second steel beam (as shown in figure 8), and installing, debugging and hoisting equipment (as shown in figure 3);
(3) hoisting a first steel beam 101 and a second steel beam 102 of the strip steel end plate 5, the vertical stud 2 and the horizontal stud 6; placing the first steel beam 101 and the second steel beam 102 on the temporary support 9, wherein the structure is in a simple supporting state (shown in fig. 4);
(4) welding the transverse connection of the first steel beam and the second steel beam, using the first steel beam and the second steel beam as supports, erecting a template, respectively pouring reinforced concrete bridge deck layers 3 on the upper surfaces of the first steel beam and the second span steel beam, wherein a space is formed between the two poured reinforced concrete bridge deck layers at the two sides, and the space can be 2-5 times of the space between the two steel end plates (as shown in figure 5);
(5) pouring a UHPC bridge deck slab layer 4 in the interval between the two sides of the poured reinforced concrete bridge deck slab layers and pouring a UHPC beam 7 in the space enclosed by the opposite surfaces of the two steel end plates and the upper end surface of the permanent support (as shown in figure 6);
(6) and (3) removing the temporary support 9, finishing the system conversion and organizing the bridge deck system construction (as shown in figure 7).
The utility model has the advantages that the vertical stud is welded on the upper surface of the steel beam in the hogging moment area of the steel-concrete combined continuous beam and the UHPC bridge deck is poured; the adjacent steel-concrete combined beams are connected through the steel end plates, the horizontal studs and the UHPC cross beam, the connecting mode is simple in structural form, clear in stress, suitable in rigidity and good in anti-seismic performance, the steel-concrete combined beams can be structurally continuous without being welded, and the construction cost and the construction period are greatly saved; the UHPC has good tensile property, and can avoid the generation and development of cracks of a reinforced concrete bridge deck slab in a hogging moment area for a steel-concrete continuous beam bridge; meanwhile, the UHPC reduces the thickness of the concrete beam and lightens the self weight of the bridge.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (4)
1. The utility model provides an adopt continuous new construction of combination beam structure of UHPC crossbeam-area bolt nail steel end plate which characterized in that: including first girder steel, the second girder steel that first end is close to each other, establish temporary support, permanent support and substructure below first end, vertical peg has been laid to the upper surface of first girder steel and second girder steel, be fixed with the steel end plate on the first end of first girder steel and second girder steel respectively, laid the level respectively on the opposite face of two steel end plates and to the peg, pour the UHPC crossbeam in the space that the opposite face of two steel end plates and permanent support up end enclose, a section UHPC bridge panel layer has been extended respectively to first girder steel and second girder steel upper surface to this UHPC crossbeam upper portion, and the side that lies in UHPC bridge panel layer on the upper surface of first girder steel and second girder steel has pour reinforced concrete bridge panel layer respectively.
2. The continuous new construction of a composite beam structure using UHPC beam-studded steel end plates according to claim 1, wherein: the vertical stud and the horizontal stud are both cylindrical head studs.
3. The continuous new construction of a composite beam structure using UHPC beam-studded steel end plates according to claim 1, wherein: vertical peg, steel end plate and level are all prefabricated the formation to peg and first girder steel or second girder steel.
4. The continuous new construction of a composite beam structure using UHPC beam-studded steel end plates according to claim 1, wherein: the distance between the two steel end plates on the first steel beam and the second steel beam is smaller than the width of the upper end of the lower structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020166429.9U CN211897803U (en) | 2020-02-13 | 2020-02-13 | Continuous new structure of composite beam structure adopting UHPC beam-steel end plate with studs |
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| CN202020166429.9U CN211897803U (en) | 2020-02-13 | 2020-02-13 | Continuous new structure of composite beam structure adopting UHPC beam-steel end plate with studs |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074752A (en) * | 2020-02-13 | 2020-04-28 | 福州大学 | Continuous new structure of composite beam structure adopting UHPC beam-steel end plate with studs and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074752A (en) * | 2020-02-13 | 2020-04-28 | 福州大学 | Continuous new structure of composite beam structure adopting UHPC beam-steel end plate with studs and construction method thereof |
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