CN110670470A - Steel structure bridge with steel-concrete combined cross beam arranged at beam end - Google Patents
Steel structure bridge with steel-concrete combined cross beam arranged at beam end Download PDFInfo
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- CN110670470A CN110670470A CN201910691780.1A CN201910691780A CN110670470A CN 110670470 A CN110670470 A CN 110670470A CN 201910691780 A CN201910691780 A CN 201910691780A CN 110670470 A CN110670470 A CN 110670470A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 118
- 239000010959 steel Substances 0.000 title claims abstract description 118
- 238000005192 partition Methods 0.000 claims description 9
- 239000002131 composite material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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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
- E01D1/00—Bridges in general
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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
-
- 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
-
- 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
- E01D2101/30—Metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
A steel structure bridge with steel-concrete combined cross beams arranged at beam ends is used for effectively improving the overall rigidity of the bridge and the vertical dynamic rigidity of the position of an expansion joint, greatly reducing the impact of live load of a vehicle at the beam ends and the vibration of a beam body at the expansion joint, and further effectively improving the durability of the bridge. The steel box girder comprises steel main girders on two transverse sides, and a main body of each steel main girder is a steel box girder consisting of a steel main girder bottom plate, a steel main girder top plate and two steel main girder webs on two sides. The steel-concrete combined beam is arranged at the beam end of the steel main beam, the main body of the steel-concrete combined beam is a box-shaped structure consisting of a bottom plate, a top plate and two side webs, the longitudinal two ends of the box-shaped structure are welded with the webs of the steel main beam on the same side, and the inner space of the box-shaped structure is filled with concrete and is fixedly connected with the steel main beam on the same side into a whole through a shear tenon.
Description
Technical Field
The invention relates to a bridge, in particular to a steel-concrete combined cross beam connecting structure suitable for a steel bridge.
Background
The steel structure bridge has light dead weight and relatively low rigidity, so that the beam end has obvious vibration under the action of live load of the automobile, and the expansion joint at the beam end has relatively high impact coefficient. The end cross beam of the traditional steel-concrete composite bridge mostly adopts an I-shaped steel form, and the impact effect of automobile load is more obvious because the I-shaped steel cross beam is lower in rigidity. According to the detection of the same type of solid bridges, the impact coefficient of the end beam reaches over 2.0 due to the influence of vehicle jumping caused by the bridge at the position of the expansion joint, and greatly exceeds the impact coefficient (0.05-0.3) of a common bridge, so that the load of the bridge structure is greatly increased. In addition, due to the obvious increase of live load and the increase of fatigue damage of a steel structure, the extension of fatigue cracks weakens the rigidity of the section, aggravates the live load effect and causes vicious circle.
Disclosure of Invention
The invention aims to solve the technical problem of providing a steel structure bridge with a steel-concrete combined cross beam arranged at the beam end, so that the overall rigidity of the bridge and the vertical dynamic rigidity of the position of an expansion joint are effectively improved, the impact of live load of a vehicle at the beam end and the vibration of a beam body at the expansion joint are greatly reduced, and the durability of the bridge is effectively improved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention discloses a steel structure bridge with a steel-concrete combined beam arranged at the beam end, which comprises steel main beams at two transverse sides, wherein the main body of each steel main beam is a steel box beam consisting of a steel main beam bottom plate, a steel main beam top plate and two steel main beam webs at two sides, and the steel structure bridge is characterized in that: the steel-concrete combined beam is arranged at the beam end of the steel main beam, the main body of the steel-concrete combined beam is a box-shaped structure consisting of a bottom plate, a top plate and two side webs, the longitudinal two ends of the box-shaped structure are welded with the webs of the steel main beam on the same side, and the inner space of the box-shaped structure is filled with concrete and is fixedly connected with the steel main beam on the same side into a whole through a shear tenon.
The shear tenon is composed of a vertical mother board, an end steel plate and shear nails, the end steel plate is welded and fixed on the inner side edge of the vertical mother board, and the vertical mother board and the end steel plate are T-shaped on the horizontal section; the shear nails are longitudinally and transversely welded on the two side plate surfaces of the vertical mother plate at intervals, and are longitudinally and transversely welded on the outer plate surface of the end steel plate at intervals.
An end transverse partition plate welded with the bottom plate of the steel main beam, the top plate of the steel main beam and the inner walls of the web plates of the steel main beams on two sides is arranged above the bridge support in the steel main beam, and an end longitudinal stiffening rib welded with the plate surface of the end transverse partition plate and the bottom plate of the steel main beam is arranged in the middle of the end transverse partition plate; the outer side edge of the vertical steel plate of the shear tenon is welded with the outer wall of the web plate of the main steel beam at the same side, and the position of the outer side edge corresponds to the transverse partition plate at the end part.
A pair of end vertical stiffening ribs is welded on the inner wall of a web plate of the steel main beam corresponding to the web plates on two sides of the steel-concrete combined beam in the steel main beam, end horizontal stiffening ribs are respectively arranged on two sides of the surface of the end diaphragm plate, and the end horizontal stiffening ribs are welded with the end diaphragm plate, the web plate of the steel main beam, the end vertical stiffening ribs and the end vertical stiffening ribs.
The invention has the advantages that the steel-concrete combined beam replaces the traditional I-shaped steel beam, and provides larger in-plane and out-plane bending rigidity through the combined section of the steel box, so as to improve the transverse connection among the longitudinal beam pieces, improve the overall rigidity of the beam lattice and the vertical dynamic rigidity at the position of the expansion joint, further improve the dynamic performance, effectively reduce the impact effect, greatly reduce the impact of the live load of the automobile at the beam end and the vibration of the beam body at the expansion joint, and further effectively improve the durability of the bridge; through the shear tenon structure of the steel-concrete combined beam, the bridge deck load is effectively transferred to the end diaphragm plate and further transferred to the steel girder body, the force transfer is clear, and the structure is reasonable; the larger rigidity of the steel-concrete combined cross beam can also be used as a temporary jack support for replacing a steel bridge support, so that the future support replacement and daily maintenance of the bridge are facilitated; the steel-concrete combined beam effectively improves the durability of the beam and effectively reduces the risk caused by the corrosion of the steel beam at the telescopic joint end.
Drawings
The specification includes the following five figures:
FIG. 1 is an elevation view of a steel structure bridge with a steel-concrete composite beam installed at a beam end according to the present invention;
FIG. 2 is a cross-sectional view taken along A-A in FIG. 1;
FIG. 3 is a schematic structural diagram of a shear tenon in a steel structure bridge with a steel-concrete combined beam at the beam end according to the present invention;
FIG. 4 is a schematic structural view of a vertical stiffener in a steel structure bridge with a steel-concrete composite beam at the beam end according to the present invention;
fig. 5 is a top view (partially) of a steel structure bridge with a steel-concrete composite beam at the beam end according to the present invention.
The figures show the components and corresponding references: the steel main beam comprises a steel main beam 10, a steel main beam bottom plate 11, a steel main beam top plate 12, a steel main beam web plate 13, an end diaphragm plate 14, an end vertical stiffening rib 15, an end longitudinal stiffening rib 16, an end horizontal stiffening rib 17, a steel-concrete composite structure cross beam 20, a bottom plate 21, a top plate 22, a web plate 23, a shear tenon 24, a vertical mother plate 241, an end steel plate 242, a shear nail 243, a cross beam vertical stiffening rib 25, a concrete pouring hole 26 and an exhaust hole 27.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Referring to fig. 1 and 2, the steel structure bridge with the steel-concrete combined cross beam at the beam end comprises steel main beams 10 at two transverse sides, wherein the main body of each steel main beam 10 is a steel box beam consisting of a steel main beam bottom plate 11, a steel main beam top plate 12 and two steel main beam web plates 13 at two sides. The steel-concrete combined beam 20 is arranged at the beam end of the steel main beam 10, the main body of the steel-concrete combined beam 20 is a box-shaped structure formed by a bottom plate 21, a top plate 22 and two side webs 23, the longitudinal two ends of the box-shaped structure are welded with the webs 13 of the steel main beam on the same side, the inner space of the box-shaped structure is filled with concrete, and the box-shaped structure is fixedly connected with the steel main beam 10 on the same side into a whole through a shear tenon 24.
The invention replaces the traditional I-shaped steel beam with the steel-concrete combined beam 20, provides larger in-plane and out-of-plane bending rigidity through the combined section of the steel box, improves the transverse connection among longitudinal beam pieces, improves the integral rigidity of beam lattices and the vertical dynamic rigidity at the position of an expansion joint, further improves the dynamic performance, effectively reduces the impact effect, greatly reduces the impact of live load of a vehicle at the beam end and the vibration of a beam body at the expansion joint, and further effectively improves the durability of a bridge. The larger rigidity of the steel-concrete combined cross beam can also be used as a temporary jack support for replacing a steel bridge support, so that the future support replacement and daily maintenance of the bridge are facilitated; the steel-concrete combined beam effectively improves the durability of the beam and effectively reduces the risk caused by the corrosion of the steel beam at the telescopic joint end.
Referring to fig. 2 and 3, the shear tenon 24 is composed of a vertical mother plate 241, an end steel plate 242 and a shear nail 243, the end steel plate 242 is welded and fixed at the end of the vertical mother plate 241, and the vertical mother plate 241 and the end steel plate 242 are T-shaped in horizontal section. The shear nails 243 are welded on the two side plate surfaces of the vertical mother plate 241 and the outer plate surface of the end steel plate 242 at intervals in the longitudinal and transverse directions.
Referring to fig. 1 and 2, an end diaphragm 14 welded to the inner walls of a steel girder bottom plate 11, a steel girder top plate 12 and two steel girder webs 13 is arranged above a bridge support in the steel girder 10, and a support vertical local stiffening rib 16 welded to the plate surface of the end diaphragm 14 and the steel girder bottom plate 11 is arranged in the middle of the end diaphragm 14. One transverse side of the vertical master plate 241 of the shear tenon 24 is welded with the outer surface of the web plate 13 of the steel girder on the same side, and the position of the transverse side corresponds to that of the end transverse partition plate 14, so that the bridge deck load is effectively transferred to the end transverse partition plate 14 and further transferred to the steel girder body. As the optimization of the structure of the steel girder 10, a pair of end vertical stiffening ribs 15 are welded on the inner side of the steel girder web 13 corresponding to the webs 23 on the two sides of the steel-concrete combined beam 20 in the steel girder 10, two end horizontal stiffening ribs 17 are respectively arranged on the two sides of the surface of the end diaphragm 14, and the end horizontal stiffening ribs 17 are welded with the end diaphragm 14, the steel girder web 13, the end vertical stiffening ribs 15 and the end vertical stiffening ribs 16.
Referring to fig. 2 and 5, in the steel-concrete composite beam 20, beam vertical stiffeners 25 are welded at intervals in the longitudinal direction on the inner walls of two side webs 23, so that the interface separation caused by the shrinkage creep of concrete is prevented, and meanwhile, a hand hole structure is arranged on the webs 23 for facilitating construction. Referring to fig. 5, concrete pouring holes 26 are formed in the top plate 22 at both sides of the steel-concrete composite beam 20, and exhaust holes 27 are formed in both sides of the concrete pouring holes 26.
The foregoing is merely illustrative of some of the principles of the present invention for a steel structure bridge with steel-concrete composite beams at the beam ends, and is not intended to limit the invention to the specific structures and applications shown and described, and accordingly, all modifications and equivalents that may be utilized are intended to fall within the scope of the claims.
Claims (6)
1. The utility model provides a beam-ends sets up steel structure bridge of steel-concrete combination crossbeam, includes steel girder (10) of horizontal both sides, and the main part of steel girder (10) is the steel box girder by steel girder bottom plate (11), steel girder roof board (12) and both sides steel girder web (13), characterized by: the steel-concrete combined beam is characterized in that a steel-concrete combined beam (20) is arranged at the beam end of the steel main beam (10), the main body of the steel-concrete combined beam (20) is a box-shaped structure formed by a bottom plate (21), a top plate (22) and two side webs (23), the longitudinal two ends of the box-shaped structure are welded with the same side steel main beam web (13), filling concrete is poured into the inner space of the box-shaped structure, and the box-shaped structure and the same side steel main beam (10) are fixedly connected into a whole through a shear tenon (24).
2. The steel structure bridge with the steel-concrete combined beam at the beam end as claimed in claim 1, wherein: the shear tenon (24) is composed of a vertical mother board (241), an end steel plate (242) and shear nails (243), the end steel plate (242) is welded and fixed on the inner side edge of the vertical mother board (241), and the vertical mother board (241) and the end steel plate (242) are T-shaped on the horizontal section; the shear nails (243) are welded on two side plate surfaces of the vertical mother plate (241) at intervals in the longitudinal and transverse directions, and are welded on the outer plate surface of the end steel plate (242) at intervals in the longitudinal and transverse directions.
3. The steel structure bridge with the steel-concrete combined beam at the beam end as claimed in claim 2, wherein: an end transverse partition plate (14) welded with the inner walls of the steel main beam bottom plate (11), the steel main beam top plate (12) and the two side steel main beam webs (13) is arranged above the bridge support in the steel main beam (10), and an end longitudinal stiffening rib (16) welded with the plate surface of the end transverse partition plate (14) and the steel main beam bottom plate (11) is arranged in the middle of the end transverse partition plate (14); the outer side edge of the vertical steel plate (241) of the shear tenon (24) is welded with the outer wall of the steel main beam web plate (13) on the same side, and the position of the outer side edge corresponds to the end diaphragm (14).
4. The steel structure bridge with the steel-concrete combined beam at the beam end as claimed in claim 3, wherein: a pair of end vertical stiffening ribs (15) are welded on the inner wall of a steel girder web plate (13) corresponding to web plates (23) on two sides of a steel-concrete combined beam (20) in the steel girder (10), end horizontal stiffening ribs (17) are respectively arranged on two sides of the surface of an end diaphragm plate (14), and the end horizontal stiffening ribs (17) are welded with the end diaphragm plate (14), the steel girder web plate (13), the end vertical stiffening ribs (15) and end vertical stiffening ribs (16).
5. The steel structure bridge with the steel-concrete combined beam at the beam end as claimed in claim 1, wherein: and vertical stiffening ribs (25) of the cross beam are welded on the inner walls of the webs (23) at two sides in the steel-concrete combined cross beam (20) at intervals along the longitudinal direction.
6. The steel structure bridge with the steel-concrete combined beam at the beam end as claimed in claim 1, wherein: concrete pouring holes (26) are formed in the top plate (22) on two sides of the steel-concrete combined beam (20), and exhaust holes (27) are formed in two sides of each concrete pouring hole (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910691780.1A CN110670470A (en) | 2019-07-29 | 2019-07-29 | Steel structure bridge with steel-concrete combined cross beam arranged at beam end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910691780.1A CN110670470A (en) | 2019-07-29 | 2019-07-29 | Steel structure bridge with steel-concrete combined cross beam arranged at beam end |
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| Publication Number | Publication Date |
|---|---|
| CN110670470A true CN110670470A (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910691780.1A Pending CN110670470A (en) | 2019-07-29 | 2019-07-29 | Steel structure bridge with steel-concrete combined cross beam arranged at beam end |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831866A (en) * | 2010-05-11 | 2010-09-15 | 天津市市政工程设计研究院 | Steel-concrete joint section structure of beams |
| CN205711701U (en) * | 2016-04-27 | 2016-11-23 | 长安大学 | A kind of steel plate combination beam bridge pier consolidation structure |
| CN206328669U (en) * | 2016-11-10 | 2017-07-14 | 河南大建桥梁钢构股份有限公司 | The narrow composite beam of steel box of new concrete |
| JP2018031235A (en) * | 2016-08-26 | 2018-03-01 | 阪神高速道路株式会社 | Connection structure for steel girder bridge and connection method for existing steel girder bridge |
| CN211113110U (en) * | 2019-07-29 | 2020-07-28 | 四川省公路规划勘察设计研究院有限公司 | Steel structure bridge with steel-concrete combined cross beam arranged at beam end |
-
2019
- 2019-07-29 CN CN201910691780.1A patent/CN110670470A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831866A (en) * | 2010-05-11 | 2010-09-15 | 天津市市政工程设计研究院 | Steel-concrete joint section structure of beams |
| CN205711701U (en) * | 2016-04-27 | 2016-11-23 | 长安大学 | A kind of steel plate combination beam bridge pier consolidation structure |
| JP2018031235A (en) * | 2016-08-26 | 2018-03-01 | 阪神高速道路株式会社 | Connection structure for steel girder bridge and connection method for existing steel girder bridge |
| CN206328669U (en) * | 2016-11-10 | 2017-07-14 | 河南大建桥梁钢构股份有限公司 | The narrow composite beam of steel box of new concrete |
| CN211113110U (en) * | 2019-07-29 | 2020-07-28 | 四川省公路规划勘察设计研究院有限公司 | Steel structure bridge with steel-concrete combined cross beam arranged at beam end |
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