CN111996900A - Steel-concrete combined section for mixed beam cable-stayed bridge and mixed beam cable-stayed bridge - Google Patents
Steel-concrete combined section for mixed beam cable-stayed bridge and mixed beam cable-stayed bridge Download PDFInfo
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- CN111996900A CN111996900A CN202010663805.XA CN202010663805A CN111996900A CN 111996900 A CN111996900 A CN 111996900A CN 202010663805 A CN202010663805 A CN 202010663805A CN 111996900 A CN111996900 A CN 111996900A
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- 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
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
Abstract
The invention provides a steel-concrete combined section for a mixed beam cable-stayed bridge and the mixed beam cable-stayed bridge, wherein the steel-concrete combined section comprises: the device comprises a bottom plate extension section, a web plate extension section, a top plate extension section, a transition section steel stiffening rib and a pressure bearing plate; the transition section steel stiffening rib is arranged on the bottom plate extension section, the front end of the transition section steel stiffening rib is connected with the bottom plate longitudinal stiffening rib of the main span composite beam, and the rear end of the transition section steel stiffening rib is connected with the pressure bearing plate; the front end of the bearing plate is provided with an open pore steel web plate; PBL steel bar connectors penetrate through the connecting holes of the perforated steel web plates; concrete is poured on one side of the bearing plate, which is adjacent to the side span concrete beam; concrete is poured at the rear end of the bearing plate, the rear end of the bearing plate is connected with the side span concrete beam, and the top of the front end of the bearing plate is connected with a steel main beam top plate; the bearing plate, the base plate extension section and the web plate extension section are provided with a plurality of shear connectors on a steel surface in contact with concrete. The invention can overcome the defects of complex structure and difficult construction of the combined section of the hybrid beam cable-stayed bridge in the prior art.
Description
Technical Field
The application relates to the technical field of bridge engineering and composite structures, in particular to a steel-concrete combined section for a hybrid beam cable-stayed bridge and the hybrid beam cable-stayed bridge.
Background
With the continuous development of bridge construction in China, the requirement on the span of the bridge is also continuously improved. The mixed beam cable-stayed bridge has the advantages of different materials, excellent stress performance, good economical efficiency and excellent spanning performance due to the adoption of the structural form of side span concrete and mid span steel box girder/combined beam, so that the mixed beam cable-stayed bridge is more and more widely used in recent years. However, the large difference in the cross-sectional dimensions between the concrete beam and the steel beam causes the joint stiffness and the bearing capacity to be increased suddenly, which becomes a weak point of the whole structural system, so that the steel-concrete combined section is the key for designing and constructing the hybrid beam cable-stayed bridge. The traditional combined section of the hybrid beam cable-stayed bridge has a complex structure, concrete pouring is very difficult, and the construction quality is often difficult to guarantee.
The PK (Pasco-Kennewick, Pasck-Kennewick) box combination beam has the advantages of good stress performance, light dead weight, attractive appearance and the like as a novel bridge section form, and is mostly applied to newly built cable-stayed bridges in China in recent years, but is less common in mixed beam cable-stayed bridges. The novel bridge structure system adopting the edge-span concrete box girder and the mid-span PK box combination girder has the advantages of the combination girder and the PK box combination girder, and has wide application prospect. Therefore, a reasonably feasible joint section construction form needs to be provided for the new form of the hybrid beam cable-stayed bridge.
Disclosure of Invention
In view of the above, the present invention provides a steel-concrete joint section for a hybrid beam cable-stayed bridge and a hybrid beam cable-stayed bridge, so as to effectively improve the disadvantages of complex structure and difficult construction of the joint section of the hybrid beam cable-stayed bridge in the prior art.
The technical scheme of the invention is realized as follows:
a steel-concrete combined section for a mixed beam cable-stayed bridge is characterized in that the front end of the steel-concrete combined section is connected with a main span combined beam, and the rear end of the steel-concrete combined section is connected with a side span concrete beam; the steel-concrete joint section includes: the device comprises a bottom plate extension section, a web plate extension section, a top plate extension section, a transition section steel stiffening rib and a pressure bearing plate;
the bottom plate extension section is a section of the main steel beam bottom plate of the main span composite beam extending into the steel-concrete combination section;
the web plate extension section is a section of the main steel beam web plate of the main span composite beam extending into the steel-concrete combination section;
the top plate extension section is a section of the main steel beam top plate of the main span composite beam extending into the steel-concrete combination section;
the transition section steel stiffening ribs are arranged on the bottom plate extension section, the front ends of the transition section steel stiffening ribs are connected with the bottom plate longitudinal stiffening ribs of the main span composite beam, and the rear ends of the transition section steel stiffening ribs are connected with the pressure bearing plate;
the pressure bearing plate is aligned with the transition section steel stiffening rib, and the front end of the pressure bearing plate is provided with an open pore steel web plate;
a plurality of connecting holes are formed in the perforated steel web plate; PBL steel bar connecting pieces penetrate through the connecting holes;
concrete is poured on one side, adjacent to the side span concrete beam, of the bearing plate;
the concrete is poured at the rear end of the bearing plate, the rear end of the concrete is connected with the side span concrete beam, and the top of the front end of the concrete is connected with the top plate of the steel main beam;
the bearing plate, the base plate extension section and the web plate extension section are provided with a plurality of shear connectors on a steel surface in contact with concrete.
Preferably, the cross sections of the side span concrete beam and the main span combined beam are PK box-type cross sections.
Preferably, the shear connector is a stud connector or a profile steel connector.
Preferably, the transition section steel stiffening rib is one of a T-shaped stiffening rib, a U-shaped stiffening rib or an n-shaped stiffening rib.
The invention also provides a PK section type hybrid beam cable-stayed bridge, which comprises the following components: the side span concrete beam, the main span composite beam and the steel-concrete combined section;
the side span concrete beam and the main span combined beam are connected through the steel-concrete combined section;
wherein, the combination beam is striden to the owner includes: the steel girder comprises a steel girder bottom plate, a steel girder web plate, a steel girder top plate and a concrete slab;
the concrete slab is connected with a steel girder top plate through a stud connecting piece, and a bottom plate longitudinal stiffening rib is arranged on a steel girder bottom plate;
the steel girder bottom plate, the steel girder web plate and the steel girder top plate extend into the steel-concrete joint section.
As can be seen from the above description, in the steel-concrete joint section for a hybrid beam cable-stayed bridge and the hybrid beam cable-stayed bridge according to the present invention, since the steel main beam bottom plate and the steel main beam web of the main span composite beam both extend into the steel-concrete joint section, the transition section steel stiffening rib is provided on the bottom plate extension section, the perforated steel web is provided at the front end of the bearing plate, and a plurality of perforated steel Plate (PBL) steel bar connectors are provided on the perforated steel web, and a plurality of shear connectors are provided on the bearing plate, the bottom plate extension section, and the web extension section, the steel-concrete joint section can firmly connect the main span composite beam and the side span concrete beam together. Moreover, the steel-concrete combined section has the advantages of simple structure, reasonable design, high construction speed, convenient concrete pouring and high construction quality, thereby effectively overcoming the defects of complex structure and difficult concrete pouring construction in a steel grid chamber of the mixed beam cable-stayed bridge combined section in the prior art.
Drawings
Fig. 1 is a schematic view of a PK-box hybrid beam cable-stayed bridge according to an embodiment of the present invention.
Fig. 2 is an enlarged schematic view of a portion a (i.e., a steel-concrete joint section) of fig. 1.
FIG. 3 is a cross-sectional view of a PK cassette in an embodiment of the present invention.
Fig. 4 is a sectional view taken along line a-a of fig. 2.
Fig. 5 is a 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.
Detailed Description
In order to make the technical scheme and advantages of the invention more apparent, the invention is further described in detail with reference to the accompanying drawings and specific embodiments.
In a particular embodiment of the present invention, a steel-concrete joint section for a hybrid beam cable-stayed bridge is provided.
As shown in fig. 1 to 6, in an embodiment of the present invention, a steel-concrete joint section 3 for a hybrid beam cable-stayed bridge has a front end connected to a main-span composite beam 2 and a rear end connected to an edge-span concrete beam 1, and the steel-concrete joint section 3 includes: the structure comprises a bottom plate extension section 3-1, a web plate extension section 3-2, a top plate extension section 3-3, a transition section steel stiffening rib 3-9 and a bearing plate 3-4;
the bottom plate extension section 3-1 is a section of a steel main beam bottom plate 2-1 of the main span composite beam extending into the steel-concrete combination section;
the web plate extension section 3-2 is a section of the main steel girder web plate 2-2 of the main span composite beam extending into the steel-concrete combination section;
the top plate extension section 3-3 is a section of the steel main beam top plate 2-3 of the main span composite beam extending into the steel-concrete combination section;
the transition section steel stiffening ribs 3-9 are arranged on the bottom plate extension section 3-1, the front ends of the transition section steel stiffening ribs 3-9 are connected with the bottom plate longitudinal stiffening ribs 2-6 of the main span composite beam, and the rear ends of the transition section steel stiffening ribs 3-9 are connected with the pressure bearing plate 3-4;
the pressure bearing plates 3-4 are aligned with the transition section steel stiffening ribs 3-9, and the front ends of the pressure bearing plates 3-4 are provided with perforated steel web plates 3-5;
a plurality of connecting holes are formed in the perforated steel web plates 3-5; PBL steel bar connectors 3-6 penetrate through the connecting holes;
concrete 3-8 is poured on one side, adjacent to the side span concrete beam 1, of the pressure bearing plate 3-4;
the concrete 3-8 is poured at the rear end of the bearing plate 3-4, the rear end of the concrete 3-8 is connected with the side span concrete beam 1, and the top of the front end of the concrete 3-8 is connected with the steel girder top plate 2-3; therefore, the whole steel-concrete combination section 3 can be respectively connected with the side span concrete beam 1 and the steel main beam of the main span combination beam through the steel-concrete connection structure of the concrete 3-8 and the combination section;
the bearing plate 3-4, the bottom plate extension 3-1 and the web plate extension 3-2 are provided with a plurality of shear connectors 3-7 on the steel surface in contact with concrete.
According to the concrete structure of the steel-concrete joint section 3, the steel main beam bottom plate 2-1 and the steel main beam web 2-2 of the main span composite beam 2 both extend into the steel-concrete joint section 3 to form a bottom plate extension section 3-1 and a web extension section 3-2 respectively, the bottom plate extension section 3-1 is provided with a transition section steel stiffening rib 3-9 respectively connected with the bottom plate longitudinal stiffening rib 2-6 and the bearing plate 3-4 of the main span composite beam, the front end of the bearing plate 3-4 is provided with an open-hole steel web 3-5, the open-hole steel web 3-5 is provided with a plurality of PBL steel bar connecting pieces 3-6, the bearing plate 3-4, the bottom plate extension section 3-1 and the web extension section 3-2 are provided with a plurality of shear connecting pieces 3-7, the main span composite girder 2 and the side span concrete girder 1 can be firmly coupled together. Therefore, the steel-concrete combined section has the advantages of simple structure, reasonable design, high construction speed, convenient concrete pouring and high construction quality, thereby effectively overcoming the defects of complex structure and difficult construction of the combined section of the hybrid beam cable-stayed bridge in the prior art. In addition, the steel-concrete combined section is reasonable in stress and smooth in section rigidity and stress transition, so that the connection quality of the steel-concrete combined section is easy to guarantee.
In addition, as an example, in a preferred embodiment of the invention, the cross sections of the side span concrete beam 1 and the main span composite beam 2 are both PK box-type cross sections.
In addition, as an example, in a preferred embodiment of the present invention, the shear connectors 3-7 may be a pin connector or a steel connector, or may be other suitable connectors.
Further, by way of example, in a preferred embodiment of the invention, the transition section steel stiffeners 3-9 may be one of T-type stiffeners, U-type stiffeners, or pi-type stiffeners, or may be of other suitable forms.
In addition, the invention also provides a mixed beam cable-stayed bridge using the PK section form of the steel-concrete combined section.
For example, in one embodiment of the invention, the PK cross-sectional form hybrid beam cable-stayed bridge comprises: the side span concrete beam 1, the main span composite beam 2 and the steel-concrete combined section 3; the side span concrete beam 1 and the main span composite beam 2 are connected through the steel-concrete combination section 3;
wherein, the main span composite beam 2 includes: the steel girder comprises a steel girder bottom plate 2-1, a steel girder web 2-2, a steel girder top plate 2-3 and a concrete slab 2-4; the concrete slab 2-4 is connected with a steel main beam top plate 2-3 through a stud connecting piece 2-5, and a bottom plate longitudinal stiffening rib 2-6 is arranged on a steel main beam bottom plate 2-1; the steel girder bottom plate 2-1, the steel girder web plate 2-2 and the steel girder top plate 2-3 extend into the steel-concrete joint section 3.
In summary, in the technical solution of the present invention, because the steel main beam bottom plate and the steel main beam web of the main span composite beam both extend into the steel-concrete joint section, the transition section steel stiffening rib is disposed on the bottom plate extension section, the open-pore steel web is disposed at the front end of the bearing plate, the plurality of PBL steel bar connecting members are disposed on the open-pore steel web in a penetrating manner, and the plurality of shear connecting members are disposed on the bearing plate, the bottom plate extension section, and the web extension section, the steel-concrete joint section can firmly connect the main span composite beam and the side span concrete beam together. Moreover, the steel-concrete combined section has the advantages of simple structure, reasonable design, high construction speed, convenient concrete pouring and high construction quality, thereby effectively overcoming the defects of complex structure and difficult construction of the combined section of the mixed beam cable-stayed bridge in the prior art.
In addition, the steel-concrete combined section is reasonable in stress and smooth in section rigidity and stress transition, so that the connection quality of the steel-concrete combined section is easy to guarantee.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A steel-concrete combined section for a mixed beam cable-stayed bridge is characterized in that the front end of the steel-concrete combined section is connected with a main span combined beam, and the rear end of the steel-concrete combined section is connected with a side span concrete beam; the steel-concrete joint section includes: the device comprises a bottom plate extension section, a web plate extension section, a top plate extension section, a transition section steel stiffening rib and a pressure bearing plate;
the bottom plate extension section is a section of the main steel beam bottom plate of the main span composite beam extending into the steel-concrete combination section;
the web plate extension section is a section of the main steel beam web plate of the main span composite beam extending into the steel-concrete combination section;
the top plate extension section is a section of the main steel beam top plate of the main span composite beam extending into the steel-concrete combination section;
the transition section steel stiffening ribs are arranged on the bottom plate extension section, the front ends of the transition section steel stiffening ribs are connected with the bottom plate longitudinal stiffening ribs of the main span composite beam, and the rear ends of the transition section steel stiffening ribs are connected with the pressure bearing plate;
the pressure bearing plate is aligned with the transition section steel stiffening rib, and the front end of the pressure bearing plate is provided with an open pore steel web plate;
a plurality of connecting holes are formed in the perforated steel web plate; PBL steel bar connecting pieces penetrate through the connecting holes;
concrete is poured on one side, adjacent to the side span concrete beam, of the bearing plate;
the concrete is poured at the rear end of the bearing plate, the rear end of the concrete is connected with the side span concrete beam, and the top of the front end of the concrete is connected with the top plate of the steel main beam;
the bearing plate, the base plate extension section and the web plate extension section are provided with a plurality of shear connectors on a steel surface in contact with concrete.
2. The steel-concrete joint section according to claim 1, wherein:
the section forms of the side span concrete beam and the main span combined beam are PK box-type sections.
3. The steel-concrete joint section according to claim 1, wherein:
the shear connector is a stud connector or a profile steel connector.
4. The steel-concrete joint section according to claim 1, wherein:
the transition section steel stiffening rib is one of a T-shaped stiffening rib, a U-shaped stiffening rib or an n-shaped stiffening rib.
5. A hybrid beam cable-stayed bridge of PK cross-section form, characterized in that the hybrid beam cable-stayed bridge of PK cross-section form comprises: the side span concrete beam, the main span combined beam and the steel-concrete combined section as claimed in any one of claims 1 to 4;
the side span concrete beam and the main span combined beam are connected through the steel-concrete combined section;
wherein, the combination beam is striden to the owner includes: the steel girder comprises a steel girder bottom plate, a steel girder web plate, a steel girder top plate and a concrete slab;
the concrete slab is connected with a steel girder top plate through a stud connecting piece, and a bottom plate longitudinal stiffening rib is arranged on a steel girder bottom plate;
the steel girder bottom plate, the steel girder web plate and the steel girder top plate extend into the steel-concrete joint section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010663805.XA CN111996900A (en) | 2020-07-10 | 2020-07-10 | Steel-concrete combined section for mixed beam cable-stayed bridge and mixed beam cable-stayed bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010663805.XA CN111996900A (en) | 2020-07-10 | 2020-07-10 | Steel-concrete combined section for mixed beam cable-stayed bridge and mixed beam cable-stayed bridge |
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| CN111996900A true CN111996900A (en) | 2020-11-27 |
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| CN202010663805.XA Pending CN111996900A (en) | 2020-07-10 | 2020-07-10 | Steel-concrete combined section for mixed beam cable-stayed bridge and mixed beam cable-stayed bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136784A (en) * | 2021-04-16 | 2021-07-20 | 上海市政工程设计研究总院（集团）有限公司 | Composite main beam cable-stayed bridge |
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| CN104831637A (en) * | 2015-05-31 | 2015-08-12 | 长安大学 | Steel beam inserted type steel-concrete combined section construction of composite beam |
| CN110093848A (en) * | 2019-05-10 | 2019-08-06 | 广东省交通规划设计研究院股份有限公司 | Ultra-high performance concrete combination beam and beams of concrete adapter section construct |
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2020
- 2020-07-10 CN CN202010663805.XA patent/CN111996900A/en active Pending
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| JP2004003236A (en) * | 2002-04-04 | 2004-01-08 | Kajima Corp | Structure of joint between steel-concrete composite structure and reinforced concrete structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113136784A (en) * | 2021-04-16 | 2021-07-20 | 上海市政工程设计研究总院（集团）有限公司 | Composite main beam cable-stayed bridge |
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Application publication date: 20201127 |