CN115341448A - Spliced heightened steel girder, combined girder and processing method - Google Patents
Spliced heightened steel girder, combined girder and processing method Download PDFInfo
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- CN115341448A CN115341448A CN202211125910.3A CN202211125910A CN115341448A CN 115341448 A CN115341448 A CN 115341448A CN 202211125910 A CN202211125910 A CN 202211125910A CN 115341448 A CN115341448 A CN 115341448A
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/02—Bridges characterised by the cross-section of their bearing spanning structure of the I-girder type
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The invention discloses a spliced heightened steel girder which comprises a plurality of sequentially arranged profile steel parts of an integral rolling forming structure, wherein each profile steel part comprises: a web, vertically disposed, having a first end and a second end; the upper flange plate is perpendicular to the web plate, connected with the first end and extends towards two sides of the web plate; the lower flange plate is parallel to the upper flange plate, is connected with the second end and extends towards two sides of the web plate; wherein, the adjacent top flange board and the bottom flange board of shaped steel part have the coincide face between, and are provided with fastening bolt on the coincide face. The invention also discloses a composite beam based on the spliced heightened steel girder and a processing method thereof. The invention adopts a mode of combining factory prefabrication and field construction, thereby being beneficial to saving the construction period and the cost and being convenient for transportation.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a spliced heightened steel girder, a combined beam and a processing method.
Background
The steel has high tensile strength, good ductility, and the concrete material has high compressive strength and high rigidity. In order to simultaneously exert the material advantages of the two materials, steel-concrete composite structures are increasingly applied in bridge engineering. In the steel-concrete composite girder, an i-shaped steel plate girder is mostly used. Along with the increase of the span, the requirements on the rigidity and the bending resistance of the steel main beam are higher and higher, so that the height of the steel main beam can reach the condition of more than 2 meters. Under the existing processing technical conditions, the steel plate beam with the length of less than 1.2 meters can adopt integrally rolled H-shaped steel, the web plate and the upper and lower flanges are integrated, the integral structure has no welding line, the force transmission performance and the fatigue performance are excellent, and the processing and the manufacturing are convenient; and the steel plate girder with the length of more than 1.2 meters can only be formed by welding the upper flange plate and the lower flange plate on the web plate, and the steel structure comprises four welding seams and becomes a weak area of the structure under stress.
Disclosure of Invention
In order to solve the above problems, the present invention provides a spliced and heightened steel section beam, a spliced and heightened combined beam, and a processing method of the spliced and heightened combined beam, and specifically the following technical solutions may be adopted:
the spliced heightened steel girder comprises a plurality of sequentially arranged steel sections, wherein each steel section is of an integral rolling forming structure and comprises
A web, vertically disposed, having a first end and a second end;
the upper flange plate is perpendicular to the web plate, connected with the first end and extends towards two sides of the web plate;
the lower flange plate is parallel to the upper flange plate, is connected with the second end and extends towards two sides of the web plate;
the adjacent upper flange plate and the lower flange plate of the section steel part are provided with a superposed surface, and the superposed surface is provided with a fastening bolt.
The spliced heightened steel girder steel can not only improve the height of the steel girder through the connection of a plurality of section steel components, thereby being suitable for larger span; moreover, because all the steel parts are formed by rolling, no welding seam exists between the web plate and the flange plate, the force transmission performance and the fatigue performance are excellent; in addition, the adjacent section steel components are connected through the fastening bolts, no welding seam exists in the whole structure, the processing and the manufacturing are convenient, the cost is saved, and the transportation is convenient.
In order to facilitate connection and installation, through holes matched with the fastening bolts are formed in the upper flange plate and the lower flange plate.
In order to facilitate processing, the through holes are respectively arranged in rows on two sides of the web, and each row of through holes comprises a plurality of through holes.
In order to save cost, the through holes are respectively arranged in a row on two sides of the web.
The through holes are matched with the fastening bolts, so that the adjacent section steel parts are tightly connected into a whole. The width of the lower flange plate and the upper flange plate of the adjacent steel components should be the same or close, bolt holes (namely through holes) are conveniently arranged, and reliable connection of the adjacent steel components is realized. Through bolted connection, can reduce the welding seam, processing is convenient, shortens construction period, reduces engineering cost. The selection of the space of the bolt holes and the type of the bolt is determined according to the actual engineering condition.
Since the section steel part is a single component, the width and thickness of the flange plate can be the same or different, and the specific size can be determined according to the structural design requirement, so that the overlapping surface is equal to the upper flange plate, or equal to the lower flange plate, or equal to both the upper flange plate and the lower flange plate.
The spliced and heightened steel-section combined beam comprises any one of the spliced and heightened steel-section beams, and a concrete plate is arranged on the upper flange plate positioned at the top. Since the upper portion of the upper flange plate positioned on the top is covered with the concrete slab, the thickness of the steel section and the width of the upper flange plate can be reduced appropriately.
In order to strengthen the connection firmness of the steel plate and the concrete plate, a shear connecting piece for connecting the concrete plate is arranged on the upper flange plate positioned on the top.
Preferably, the shear connector is a shear pin or an open-cell plate connector.
The invention relates to a processing method for splicing the heightened steel composite beam, which comprises the following steps:
firstly, obtaining various steel parts through integral rolling;
secondly, selecting a proper number of section steel parts with proper types according to setting requirements, sequentially arranging the section steel parts from top to bottom, forming rows of through holes positioned at two sides of the web plate on the upper flange plate and the lower flange plate which are mutually overlapped, and then reliably connecting the adjacent upper flange plate and the lower flange plate of the section steel parts by using fastening bolts to obtain a spliced heightened section steel girder;
and thirdly, arranging a certain number of shear connectors on the flange plates on the top of the spliced and heightened steel girder, and pouring a concrete slab in a factory or a construction site to finish the processing of the spliced and heightened steel composite girder.
Compared with the prior art, the invention has the beneficial effects that:
the spliced heightened steel girder disclosed by the invention not only can greatly improve the girder height, but also can process and form a steel plate girder with the girder height of more than 2m, so that the requirement of a large-span bridge is met; each section steel part is formed by rolling, two adjacent section steel parts are connected by bolts, no weld seam exists in the whole structure, the quality problem of fillet weld seams in common steel plate beams is solved, and the force transmission performance and the fatigue performance are excellent; furthermore, the processing and manufacturing are convenient, more complex processing procedures are not needed after the H-shaped steel is rolled and formed, the cost is saved, and the transportation is convenient.
The spliced and heightened profile steel composite beam not only greatly improves the beam height of the spliced and heightened profile steel beam and meets the requirement of a large-span bridge, but also can fully exert the material advantages of high tensile strength, good ductility, strong concrete compression resistance and high rigidity of steel materials by covering the first flange plate with the concrete slab, and can be widely applied to bridge engineering with the span of 20-70 meters.
The processing method of the spliced heightened steel composite beam is manufactured by combining factory prefabrication and field construction, is beneficial to saving the construction period and the cost, and is convenient to transport.
Drawings
FIG. 1 is a schematic structural view of example 1 of the present invention.
FIG. 2 is a schematic structural view of the first section steel member of FIG. 1.
Fig. 3 is a side view of fig. 2.
Fig. 4 is a bottom view of fig. 2.
FIG. 5 is a schematic structural view of example 2 of the present invention.
FIG. 6 is a schematic structural view of example 3 of the present invention.
Fig. 7 is a side view of fig. 6.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific processes are given, but the scope of the present invention is not limited to the following embodiments.
Example 1:
as shown in fig. 1 to 4, the spliced heightened steel-reinforced beam of the invention is composed of two steel sections which are stacked together and connected by bolts, and each steel section is of an integral roll-formed structure.
Specifically, the first steel section is an i-shaped section composed of a first upper flange plate 11, a first web plate 12 and a first lower flange plate 13, wherein the first web plate 12 is vertically arranged and has a first end and a second end; the first upper flange plate 11 is perpendicular to the first web plate 12, connected to a first end of the first web plate 12, and extends to both sides of the first web plate 12; the first lower flange plate 13 is parallel to the first upper flange plate 11, is connected to the second end of the first web 12, and extends to both sides of the first web 12. Two rows of through holes 51 are formed in the first lower flange plate 13, and are respectively arranged on two sides of the first web 12 for mounting the fastening bolts 5. Similarly, the second section steel component is an i-shape formed by the second upper flange plate 21, the second web plate 22 and the second lower flange plate 23, and the connection relationship of the second upper flange plate 21, the second web plate 22 and the second lower flange plate 23 is the same as that of the first section steel component. Accordingly, two rows of through holes corresponding to the positions of the through holes 51 are opened in the second upper flange plate 21.
The two section steel parts are formed by rolling, no welding seam exists between the web plate and the flange plate, and the force transmission performance and the fatigue performance are excellent; in addition, the adjacent section steel components are connected through the fastening bolts, no welding seam exists in the whole structure, the processing and the manufacturing are convenient, the cost is saved, and the transportation is convenient. The height of the steel main beam can be improved by splicing and heightening the two section steel components, so that the steel main beam is suitable for larger span.
Because the section steel part is a single component, the width and the thickness of the flange plate can be the same or different, and the specific size can be determined according to the structural design requirement. In the present embodiment, the first lower flange plate 13 of the first section steel member and the second upper flange plate 21 of the second section steel member are equal in area, and therefore the overlapping surfaces thereof are equal to the first lower flange plate 13 and the second upper flange plate 21. When the section steel parts adopt different specifications, the superposed surface of the section steel parts is equal to the upper flange plate or the lower flange plate. In either case, the overlapping surfaces are formed with through holes 51 and are connected by fastening bolts 5. The selection of the space of the bolt holes and the type of the bolt is determined according to the actual engineering condition.
The through holes are matched with the fastening bolts, so that the adjacent section steel parts can be tightly connected into a whole. The bolt connection mode can reduce welding seams, is convenient to process, shortens the construction period and reduces the engineering cost.
Example 2:
as shown in fig. 5, the spliced heightened steel-reinforced beam of the invention is composed of three steel-reinforced parts which are stacked together and connected through bolts, and each steel-reinforced part is of an integral roll-formed structure.
Specifically, the first steel section is an i-shaped member formed by a first upper flange plate 11, a first web plate 12 and a first lower flange plate 13, wherein the first web plate 12 is vertically arranged and has a first end and a second end; the first upper flange plate 11 is perpendicular to the first web plate 12, connected to a first end of the first web plate 12, and extends to both sides of the first web plate 12; the first lower flange plate 13 is parallel to the first upper flange plate 11, is connected to the second end of the first web 12, and extends to both sides of the first web 12. Two rows of through holes 51 are formed in the first lower flange plate 13, and are respectively arranged on two sides of the first web 12 for mounting the fastening bolts 5.
Similarly, the second section steel component is in an i-shape formed by the second upper flange plate 21, the second web plate 22 and the second lower flange plate 23, and the connection relationship of the second upper flange plate 21, the second web plate 22 and the second lower flange plate 23 is the same as that of the first section steel component. The third steel section is in an I shape formed by a third upper flange plate 31, a third web plate 32 and a third lower flange plate 33, and the third upper flange plate 31, the third web plate 32 and the third lower flange plate 33 are connected with the first steel section.
Correspondingly, two rows of through holes corresponding to the positions of the through holes 51 are formed in the second upper flange plate 21, and two rows of through holes corresponding to the positions of the through holes are respectively formed in the superposed surface of the second lower flange plate 23 and the third upper flange plate 31 for connecting fastening bolts.
Example 3:
as shown in fig. 6 and 7, the spliced and heightened profiled steel composite beam according to the invention is composed of four profiled steel parts which are stacked together and connected through bolts, each profiled steel part is of an integral roll forming structure, and a concrete slab is poured on an upper flange plate of the top profiled steel part.
Specifically, the first steel section is an i-shaped section composed of a first upper flange plate 11, a first web plate 12 and a first lower flange plate 13, wherein the first web plate 12 is vertically arranged and has a first end and a second end; the first upper flange plate 11 is perpendicular to the first web plate 12, connected with a first end of the first web plate 12, and extends towards two sides of the first web plate 12; the first lower flange plate 13 is parallel to the first upper flange plate 11, is connected to the second end of the first web 12, and extends to both sides of the first web 12. Two rows of through holes 51 are formed in the first lower flange plate 13, and are respectively arranged on two sides of the first web 12 for mounting the fastening bolts 5.
Similarly, the second section steel component is in an i-shape formed by the second upper flange plate 21, the second web plate 22 and the second lower flange plate 23, and the connection relationship of the second upper flange plate 21, the second web plate 22 and the second lower flange plate 23 is the same as that of the first section steel component. The third steel section is an I-shaped member formed by a third upper flange plate 31, a third web plate 32 and a third lower flange plate 33, and the third upper flange plate 31, the third web plate 32 and the third lower flange plate 33 are connected with the first steel section. The fourth steel section is an i-shape formed by a fourth upper flange plate 41, a fourth web plate 42 and a fourth lower flange plate 43, and the fourth upper flange plate 41, the fourth web plate 42 and the fourth lower flange plate 43 are connected with the first steel section.
Correspondingly, two rows of through holes corresponding to the positions of the through holes 51 are formed in the second upper flange plate 21; two rows of through holes corresponding to each other in position are respectively formed in the superposed surface of the second lower flange plate 23 and the third upper flange plate 31 and are used for connecting fastening bolts; two rows of through holes corresponding to each other in position are respectively formed in the superposed surface of the third lower flange plate 33 and the fourth upper flange plate 41, and are used for connecting fastening bolts.
The shear nails 7 are welded on the top of the first upper flange plate 11 to serve as shear connecting pieces, so that the connection firmness of the first upper flange plate 11 and the concrete plate 7 poured on the first upper flange plate can be enhanced. Since the concrete plate 7 covers the upper portion of the first upper flange plate 11, the thickness of the first steel member and the width of the upper flange plate can be reduced as compared with other steel members.
Example 4:
the processing method of the spliced and heightened type steel composite beam according to the present invention will be described by taking the spliced and heightened type steel composite beam described in embodiment 3 as an example.
A first step of obtaining a first section steel member, a second section steel member, a third section steel member and a fourth section steel member by integral rolling;
secondly, arranging a first section steel component, a second section steel component, a third section steel component and a fourth section steel component from top to bottom in sequence, arranging through holes in rows at two sides of a web plate on an upper flange plate and a lower flange plate which are overlapped with each other, and then reliably connecting the adjacent upper flange plate and the lower flange plate of the section steel components by fastening bolts 5 to obtain a spliced heightened section steel girder;
thirdly, welding and distributing a certain number of shear nails 7 on the upper flange plate of the first profile steel component, and pouring a concrete plate 7 in a factory or a construction site to complete the processing of splicing the heightened profile steel composite beam.
It should be noted that in the description of the present invention, terms such as "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Claims (9)
1. The utility model provides a concatenation increases shaped steel girder which characterized in that: including a plurality of shaped steel parts that set gradually, shaped steel part is whole roll forming structure, and each shaped steel part all includes
A web, vertically disposed, having a first end and a second end;
the upper flange plate is perpendicular to the web plate, connected with the first end and extends towards two sides of the web plate;
the lower flange plate is parallel to the upper flange plate, is connected with the second end and extends towards two sides of the web plate;
the adjacent upper flange plate and the lower flange plate of the section steel part are provided with overlapping surfaces, and fastening bolts are arranged on the overlapping surfaces.
2. A spliced elevated steel section girder according to claim 1, wherein: and through holes matched with the fastening bolts are formed in the upper flange plate and the lower flange plate.
3. A spliced elevated steel section girder according to claim 2, wherein: the through holes are respectively arranged in rows on two sides of the web plate, and each row of through holes comprises a plurality of through holes.
4. A spliced elevated steel section girder according to claim 3, wherein: the through holes are respectively arranged in a row on two sides of the web plate.
5. A spliced elevated steel section girder according to claim 1, wherein: the overlapping surface is equal to the upper flange plate, or equal to the lower flange plate, or equal to both the upper flange plate and the lower flange plate.
6. The utility model provides a concatenation height shaped steel combination beam which characterized in that: the spliced heightened steel-steel beam comprises the spliced heightened steel-steel beam as claimed in any one of claims 1 to 5, and a concrete plate is arranged on the upper flange plate at the top.
7. A spliced and heightened steel composite beam according to claim 6, wherein: and a shear connector used for connecting the concrete slab is arranged on the upper flange plate positioned on the top.
8. The spliced heightened steel combination beam as claimed in claim 7, wherein: the shear connector is a shear nail or a perforated plate connector.
9. A method for processing a spliced heightened steel composite beam according to claim 7, wherein the method comprises the following steps: the method comprises the following steps:
firstly, obtaining various steel components through integral rolling;
secondly, selecting a proper number of section steel parts with proper types according to setting requirements, sequentially arranging the section steel parts from top to bottom, forming rows of through holes positioned at two sides of the web plate on the upper flange plate and the lower flange plate which are mutually overlapped, and then reliably connecting the adjacent upper flange plate and the lower flange plate of the section steel parts by using fastening bolts to obtain a spliced heightened section steel girder;
thirdly, a certain number of shear connectors are arranged on the top flange plate of the spliced heightened steel girder, and a concrete slab is poured in a factory or a construction site to complete the processing of the spliced heightened steel combination girder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211125910.3A CN115341448A (en) | 2022-09-16 | 2022-09-16 | Spliced heightened steel girder, combined girder and processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211125910.3A CN115341448A (en) | 2022-09-16 | 2022-09-16 | Spliced heightened steel girder, combined girder and processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115341448A true CN115341448A (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211125910.3A Pending CN115341448A (en) | 2022-09-16 | 2022-09-16 | Spliced heightened steel girder, combined girder and processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115341448A (en) |
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2022
- 2022-09-16 CN CN202211125910.3A patent/CN115341448A/en active Pending
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