阅读说明：本技术 一种π形波纹钢板-混凝土组合梁 (Pi-shaped corrugated steel plate-concrete combined beam ) 是由 万水 牛传同 姜竹昌 曹洪亮 尹永胜 张峰 金龙飞 路本生 于旻 张越 孙晓州 于 2019-10-25 设计创作，主要内容包括：本发明公开了一种Π形波纹钢板-混凝土组合梁,该组合梁由U形波纹钢板、下翼缘钢板、纵向开孔钢板及贯通钢筋和混凝土顶板组成,所述U形波纹钢板由一整块平钢板模压成波纹状再弯曲形成,U形波纹钢板之间采取螺栓和焊接的连接方式；所述下翼缘钢板与波纹钢板之间焊接,纵向相邻下翼缘钢板之间焊接；所述纵向开孔钢板与波纹钢板之间焊接,穿入贯通钢筋形成抗剪连接件；所述混凝土顶板在工厂浇筑,形成单个组合梁,多主梁之间通过纵向湿接缝连接。该组合梁上部波纹钢板既增大了顶板横向抗弯刚度,又可作为顶板混凝土施工的模板,采用波纹腹板也增大了结构的剪切屈曲强度,因此,结构受力合理,施工方便,且造型美观,适合装配化施工。(The invention discloses a n-shaped corrugated steel plate-concrete combined beam, which consists of a U-shaped corrugated steel plate, a lower flange steel plate, a longitudinal perforated steel plate, a through steel bar and a concrete top plate, wherein the U-shaped corrugated steel plate is formed by pressing a whole flat steel plate into a corrugated shape and then bending the corrugated steel plate, and the U-shaped corrugated steel plates are connected in a bolt and welding manner; the lower flange steel plates are welded with the corrugated steel plates, and the longitudinally adjacent lower flange steel plates are welded with each other; the longitudinal perforated steel plate and the corrugated steel plate are welded, and a through steel bar is penetrated to form the shear connector; the concrete top plate is poured in a factory to form a single combined beam, and the multiple main beams are connected through longitudinal wet joints. The corrugated steel plate on the upper part of the composite beam not only increases the transverse bending rigidity of the top plate, but also can be used as a template for concrete construction of the top plate, and the shear buckling strength of the structure is also increased by adopting the corrugated web plate, so that the structure is reasonable in stress, convenient to construct, attractive in appearance and suitable for assembly construction.)

1. The n-shaped corrugated steel plate-concrete combined beam is characterized by comprising a U-shaped corrugated steel plate (1), a lower flange steel plate (2), a longitudinal perforated steel plate (3), a through steel bar (4) and a concrete top plate (5); the corrugations of the U-shaped corrugated steel plate (1) are transversely arranged along the length direction of the U-shaped corrugated steel plate (1), the lower flange steel plate (2) is positioned at a U-shaped opening at the lower part of the U-shaped corrugated steel plate (1), and the lower flange steel plate and the U-shaped opening are welded; the longitudinal perforated steel plate (3) is positioned at the top of the U-shaped corrugated steel plate (1) and is welded and connected with the U-shaped corrugated steel plate; penetrating through steel bars (4) into through holes in the longitudinal perforated steel plates (3) to form a shear connector; and pouring concrete on the tops of the U-shaped corrugated steel plates (1) to form concrete top plates (5) to form the combined beam as a whole.

2. The h-shaped corrugated steel plate-concrete composite beam as claimed in claim 1, wherein a plurality of groups of U-shaped corrugated steel plates (1) are arranged according to the length of the beam in the longitudinal direction of the composite beam and connected by bolts (6) and welding, longitudinally adjacent lower flange steel plates (2) are connected by welding, then concrete is poured to form a single main beam, and a plurality of main beams are arranged according to the width in the transverse direction of the composite beam and connected by longitudinal wet joints (7).

3. The Π -shaped corrugated steel plate-concrete composite beam according to claim 2, characterized in that, in the single main beam, the adjacent U-shaped corrugated steel plates (1) are different in height and width to ensure that they are overlapped crosswise at the end valleys and connected by bolts (6).

4. The Π -shaped corrugated steel plate-concrete composite beam of claim 1, characterized in that, the underside of the longitudinal perforated steel plate (3) is made zigzag according to the shape of the corrugated plate to ensure the tight fit with the U-shaped corrugated steel plate (1) and the welding connection.

5. The Π -shaped corrugated steel plate-concrete composite beam of claim 1, wherein the holes of the longitudinal steel plate (3) are located at the corresponding wave crest and wave trough, the holes are penetrated with through steel bars (4) to form shear connectors; the shape of the longitudinal perforated steel plate (3) is selected from circular holes, elliptical holes or other openings or closed holes with any shapes.

6. The Π -shaped corrugated steel plate-concrete composite beam according to claim 1, wherein the thickness of the lower flange steel plate (2) is greater than the thickness of the U-shaped corrugated steel plate (1).

7. The Π -shaped corrugated steel plate-concrete composite beam of claim 1, characterized in that, the material of the U-shaped corrugated steel plate (1), the lower flange steel plate (2), the longitudinal perforated steel plate (3) can be changed into aluminum plate, copper plate or fiber reinforced composite material plate.

8. The corrugated steel plate-concrete composite beam of claim 1, wherein the concrete top plate (5) is made of common concrete, high-strength concrete, ultra-high-strength concrete or fiber concrete.

Technical Field

The invention belongs to the technical field of bridge engineering, and particularly relates to an n-shaped corrugated steel plate-concrete composite beam.

Background

With the continuous development of bridge construction in China, the traditional construction mode cannot meet the requirements of the current society, the construction modes with high overall energy consumption, poor construction quality, long construction period and low safety are gradually eliminated, and the modern bridge construction begins to develop towards the direction of industrialization, mechanization and standardization. The bridge prefabrication and assembly technology uses industrial organization experience for reference, can realize the assembly and standardized design of the structure, effectively ensures the construction quality, shortens the construction period, improves the construction conditions, and is an efficient construction method which accords with the sustainable development concept.

However, the existing prefabrication and assembly construction technology for concrete bridges and steel-concrete composite structural bridges is not mature enough, and some problems exist in the practical application process, such as: the degree of factory production is not high, and the field operation amount is still large; the width of a single beam is small, the number of main beams is large, and the number of longitudinal joints is large; the concrete bridge deck has low transverse rigidity and poor stress performance; the steel-concrete composite structure bridge needs a large number of shear nails to effectively transfer shear force and resist the lifting force between concrete and steel beams.

Disclosure of Invention

The technical problem is as follows: in order to solve the defects in the prior art, the invention provides the n-shaped corrugated steel plate-concrete composite beam which is high in factory degree, large in transverse rigidity of a bridge deck, high in efficiency of a shear connector of a steel-concrete joint part, reasonable in structural stress, high in construction speed and good in durability.

The technical scheme is as follows: in order to achieve the aim, the invention provides a Pi-shaped corrugated steel plate-concrete combined beam which consists of a U-shaped corrugated steel plate, a lower flange steel plate, a longitudinal perforated steel plate, a through steel bar and a concrete top plate; the corrugations of the U-shaped corrugated steel plate are transversely arranged along the length direction of the U-shaped corrugated steel plate, the lower flange steel plate is positioned at a U-shaped opening at the lower part of the U-shaped corrugated steel plate, and the lower flange steel plate and the U-shaped opening are welded and connected; the longitudinal perforated steel plate is positioned at the top of the U-shaped corrugated steel plate and is welded and connected with the U-shaped corrugated steel plate; penetrating through steel bars into the through holes on the longitudinal perforated steel plates to form a shear connector; and pouring concrete on the tops of the U-shaped corrugated steel plates to form a concrete top plate, and forming the combined beam as a whole.

A plurality of groups of U-shaped corrugated steel plates are arranged in the longitudinal direction of the composite beam according to the beam length and are connected in a bolt and welding mode, the longitudinally adjacent lower flange steel plates are connected in a welding mode, then concrete is poured to form a single main beam, and a plurality of main beams are arranged in the transverse direction of the composite beam according to the width and are connected through longitudinal wet joints.

In the single main beam, the adjacent U-shaped corrugated steel plates are different in height and width so as to ensure that the U-shaped corrugated steel plates are crossed and overlapped at the wave troughs of the end parts and are connected through bolts.

The lower side of the longitudinal perforated steel plate is made into a sawtooth shape according to the shape of the corrugated plate so as to ensure that the lower side of the longitudinal perforated steel plate is tightly attached to the U-shaped corrugated steel plate and is welded and connected.

The hole positions of the longitudinal steel plate with the holes are positioned at the corresponding wave crests and wave troughs, and through steel bars penetrate into the holes to form the shear connector; the shape of the opening of the longitudinal steel plate is selected from a round hole, an elliptical hole or other openings or closed holes with any shapes.

The thickness of the lower flange steel plate is larger than that of the U-shaped corrugated steel plate.

The U-shaped corrugated steel plate, the lower flange steel plate and the longitudinal perforated steel plate can be replaced by aluminum plates, copper plates or fiber reinforced composite plates.

The concrete top plate is made of common concrete, high-strength concrete, ultrahigh-strength concrete or fiber concrete.

Has the advantages that: the invention has the advantages that:

1. the steel girder and the concrete are processed and manufactured in a factory, and meanwhile, the steel girder is used as a template for concrete construction, so that the construction method is simple, the field operation amount is small, and the construction period is short;

2. because the bridge deck is of a steel-concrete composite structure, the bridge deck has high transverse rigidity and reasonable stress, and the width of a single beam can be further increased, so that the number of main beams is reduced, longitudinal joints are reduced, and the structural durability is improved;

3. the perforated steel plate penetrating through the steel bars is adopted as a shear connector between the concrete and the steel members, and the concrete is poured on the corrugated steel plate to form concrete tooth bonds, so that the shear resistance of the steel-concrete joint is further improved;

4. the web plate is made of corrugated steel plates, so that the shearing buckling strength is improved compared with a flat steel plate, and the appearance is attractive.

Drawings

In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is illustrated by the following drawings:

fig. 1 is a schematic structural view of a first steel main beam.

Fig. 2 is a structural schematic diagram of a second steel main beam.

Fig. 3 is a schematic connection diagram of two steel main beams.

Fig. 4 is a partial sectional view of the n-shaped deck plate-concrete composite beam.

Fig. 5 is a schematic view of the transverse connection of the double main beams.

Reference numerals: the steel plate comprises a U-shaped corrugated steel plate 1, a lower flange steel plate 2, a longitudinal perforated steel plate 3, a through steel bar 4, a concrete top plate 5, a bolt 6 and a longitudinal wet joint 7.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

An n-shaped corrugated steel plate-concrete combined beam comprises a U-shaped corrugated steel plate 1, a lower flange steel plate 2, a longitudinal perforated steel plate 3, a through steel bar 4 and a concrete top plate 5; the corrugations of the U-shaped corrugated steel plate 1 are transversely arranged along the length direction of the U-shaped corrugated steel plate 1, and the lower flange steel plate 2 is positioned at a U-shaped opening at the lower part of the U-shaped corrugated steel plate 1 and is welded and connected with the U-shaped opening; the longitudinal perforated steel plate 3 is positioned at the top of the U-shaped corrugated steel plate 1 and is welded and connected with the U-shaped corrugated steel plate 1; penetrating through steel bars 4 into through holes in the longitudinal perforated steel plates 3 to form a shear connector; and pouring concrete on the top of the U-shaped corrugated steel plate 1 to form a concrete top plate 5, and forming the combined beam as a whole.

In the embodiment, a plurality of groups of U-shaped corrugated steel plates 1 are arranged in the longitudinal direction of the composite beam according to the beam length and are connected in a bolt 6 and welding mode, the longitudinally adjacent lower flange steel plates 2 are connected in a welding mode, concrete is poured to form a single main beam, and a plurality of main beams are arranged in the transverse direction of the composite beam according to the width and are connected through longitudinal wet joints 7.

In the embodiment, in the single main beam, the adjacent U-shaped corrugated steel plates 1 are different in height and width to ensure that the two are overlapped at the end valleys and connected through bolts 6.

In this embodiment, the lower side of the steel plate 3 with longitudinal holes is made into a zigzag shape according to the shape of the corrugated plate, so as to ensure that the steel plate and the U-shaped corrugated steel plate 1 are tightly attached and welded.

In the embodiment, the hole positions of the longitudinal steel plate 3 are positioned at the corresponding wave crests and wave troughs, and the through steel bars 4 penetrate into the holes to form the shear connectors; the shape of the longitudinal perforated steel plate 3 is selected from a circular hole, an elliptical hole or other open or closed holes with any shape.

In this embodiment, the thickness of the lower flange steel plate 2 is greater than that of the U-shaped corrugated steel plate 1.

In this embodiment, the materials of the U-shaped corrugated steel plate 1, the lower flange steel plate 2, and the longitudinal perforated steel plate 3 may be replaced by an aluminum plate, a copper plate, or a fiber reinforced composite material plate.

In this embodiment, the concrete top plate 5 is made of common concrete, high-strength concrete, ultra-high-strength concrete or fiber concrete.

In this embodiment, first, a flat steel plate is processed into two types of U-shaped corrugated steel plates 1 according to design dimensions in a factory; then respectively welding the lower flange steel plate 2 and the longitudinal perforated steel plate 3 according to the requirement of longitudinal alignment; overlapping two U-shaped corrugated steel plates 1 at the wave troughs at the end parts in a crossed manner, connecting the two U-shaped corrugated steel plates through bolts 6, welding, and welding longitudinally adjacent lower flange steel plates 2 to form a steel girder; erecting a template in a factory, penetrating through the through reinforcing steel bars 4 and necessary longitudinal reinforcing steel bars and constructional reinforcing steel bars, and pouring a concrete top plate 5 to form the reinforced concrete composite beam; and (3) transporting a plurality of factory-prefabricated steel-concrete composite beams to a construction site, erecting the beams on the supports, and pouring longitudinal wet joints 7 between the main beams to form a bridge structure.

Finally, it should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.