CN210288074U - Hot-rolled H-shaped steel-concrete composite beam - Google Patents
Hot-rolled H-shaped steel-concrete composite beam Download PDFInfo
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- CN210288074U CN210288074U CN201920644409.5U CN201920644409U CN210288074U CN 210288074 U CN210288074 U CN 210288074U CN 201920644409 U CN201920644409 U CN 201920644409U CN 210288074 U CN210288074 U CN 210288074U
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Abstract
The utility model relates to a hot rolling H-shaped steel and concrete composite beam, which comprises a steel longitudinal beam structure, a steel cross beam structure and a concrete bridge deck; the steel longitudinal beam structure comprises N hot-rolled H-shaped steel main beams which are longitudinally arranged at intervals; each hot-rolled H-shaped steel main beam consists of one or more pieces of hot-rolled H-shaped longitudinal beam steel; the steel beam structure comprises M hot-rolled H-shaped steel beams arranged at intervals transversely, and each hot-rolled H-shaped steel beam comprises N-1 sections of hot-rolled H-shaped beam steel; the N hot-rolled H-shaped steel main beams and the M hot-rolled H-shaped steel cross beams jointly form (N-1) × (M-1) rectangular grids; the concrete bridge deck comprises (N-1) x (M-1) precast concrete plates, and the (N-1) x (M-1) precast concrete plates are respectively laid on the (N-1) x (M-1) rectangular grids. This application hot rolling H type longitudinal girder steel is integrative structure with hot rolling H type crossbeam steel, forms at the rolling of steel mill, has avoided the steel sheet welding, greatly reduced engineering cost.
Description
Technical Field
The utility model relates to a bridge engineering technical field, concretely relates to hot rolling H shaped steel mixes combination beam.
Background
The steel-concrete composite beam can fully exert the respective advantages of steel and concrete, has light self-weight of the structure, small size of the pier foundation, convenient erection, green and environmental protection and more foreign applications. At present, steel beams of the steel-concrete composite beam are welded by steel plates, so that the construction cost is high and is less than 1% in bridge construction in China. In 2016, the research of department of transportation decides to promote the construction of steel structure bridges of highways.
The hot-rolled H-shaped steel is widely applied to building structures and temporary bridge construction structures, the related technical standard is hot-rolled H-shaped steel and partial T-shaped steel (GB/T11263-.
SUMMERY OF THE UTILITY MODEL
The girder steel to steel-concrete composite beam adopts the steel sheet welding among the prior art, the high problem of engineering cost, the utility model provides a hot rolling H shaped steel-concrete composite beam.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a hot-rolled H-shaped steel-concrete composite beam comprises a steel longitudinal beam structure, a steel cross beam structure and a concrete bridge deck;
the steel longitudinal beam structure comprises N hot-rolled H-shaped steel main beams which are longitudinally arranged at intervals; each hot-rolled H-shaped steel main beam consists of one or more pieces of hot-rolled H-shaped longitudinal beam steel;
the steel beam structure comprises M hot-rolled H-shaped steel beams arranged at intervals transversely, and each hot-rolled H-shaped steel beam comprises N-1 sections of hot-rolled H-shaped beam steel; the N-1 sections of hot-rolled H-shaped beam steel are respectively positioned between N hot-rolled H-shaped steel main beams, and the N hot-rolled H-shaped steel main beams and M hot-rolled H-shaped steel beams jointly form (N-1) × (M-1) rectangular grids;
the concrete bridge deck comprises (N-1) × (M-1) precast concrete plates, and the (N-1) × (M-1) precast concrete plates are respectively laid on the (N-1) × (M-1) rectangular grids;
wherein N, M are all positive integers greater than 1.
Further, the hot-rolled H-shaped longitudinal beam steel and the hot-rolled H-shaped transverse beam steel respectively comprise an upper flange, a lower flange and a web plate, the upper end of the web plate is vertically connected with the middle of the upper flange, the lower end of the web plate is vertically connected with the middle of the lower flange, the upper flange, the lower flange and the web plate are of an integrated structure, the width of the upper flange is smaller than that of the lower flange, and the thickness of the upper flange is smaller than that of the lower flange.
Further, the upper flanges of the hot-rolled H-shaped longitudinal beam steel and the hot-rolled H-shaped transverse beam steel are on the same horizontal plane.
Furthermore, the adjacent precast concrete plates are connected through wet joints, the wet joints are located at the tops of the upper flanges of the hot-rolled H-shaped longitudinal beam steel and the hot-rolled H-shaped transverse beam steel, the width of the wet joints at the tops of the upper flanges of the hot-rolled H-shaped longitudinal beam steel is smaller than that of the upper flanges of the hot-rolled H-shaped longitudinal beam steel, and the width of the wet joints at the tops of the upper flanges of the hot-rolled H-shaped transverse beam steel is smaller than that of the upper flanges of the hot-rolled H-shaped transverse beam steel.
Furthermore, a shear connector is arranged in the wet joint, and the shear connector is respectively welded with the upper flanges of the hot-rolled H-shaped longitudinal beam steel and the hot-rolled H-shaped transverse beam steel.
Further, the width of an upper flange of the hot-rolled H-shaped longitudinal beam steel is 400-600 mm, the thickness of the upper flange is 20-32 mm, the width of a lower flange is 500-800 mm, the thickness of the lower flange is 28-48 mm, the height of a web plate is 1200-1600 mm, and the thickness of the web plate is 24-32 mm.
Furthermore, a joint plate is vertically welded on a web plate of the hot-rolled H-shaped longitudinal beam steel at the joint of the hot-rolled H-shaped longitudinal beam steel and the hot-rolled H-shaped cross beam steel, and the joint plate and the web plate of the hot-rolled H-shaped cross beam steel are positioned on the same plane and fixedly connected through a connecting plate and a bolt.
Furthermore, the horizontal distance between every two adjacent hot-rolled H-shaped steel main beams is 2.0-3.5 m, and the horizontal distance between every two adjacent hot-rolled H-shaped steel cross beams is 6-8 m.
Compared with the prior art, the beneficial effects of the utility model are that: this application hot rolling H type longitudinal girder steel forms at the rolling of steelworks with the equal body structure of hot rolling H type crossbeam steel, for whole section, has avoided the steel sheet welding, greatly reduced engineering cost.
Drawings
Fig. 1 is a cross-sectional view of a hot-rolled H-section steel-concrete composite beam at a fulcrum position according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a hot-rolled H-section steel-concrete composite beam at a mid-span position according to an embodiment of the present invention;
fig. 3 is a plan view of a steel longitudinal beam structure and a steel transverse beam structure according to an embodiment of the present invention;
fig. 4 is a schematic structural view of the hot-rolled H-shaped beam steel or the hot-rolled H-shaped beam steel according to the present invention.
In the figure:
1-hot rolling H-shaped steel main beam, 2-hot rolling H-shaped steel cross beam, 3-precast concrete plate, 4-wet joint, 5-shear connector, 6-joint plate and 7-connecting plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 4, the present embodiment provides a hot-rolled H-type steel-concrete composite beam, which includes a steel longitudinal beam structure, a steel transverse beam structure and a concrete bridge deck;
the steel longitudinal beam structure comprises N hot-rolled H-shaped steel main beams 1 which are longitudinally arranged at intervals; each hot-rolled H-shaped steel girder 1 consists of one or more pieces of hot-rolled H-shaped longitudinal beam steel;
the steel beam structure comprises M hot-rolled H-shaped steel beams 2 arranged at intervals transversely, and each hot-rolled H-shaped steel beam 2 comprises N-1 sections of hot-rolled H-shaped beam steel; the N-1 sections of hot-rolled H-shaped beam steel are respectively positioned between N hot-rolled H-shaped steel main beams 1, and the N hot-rolled H-shaped steel main beams 1 and M hot-rolled H-shaped steel beams 2 jointly form (N-1) × (M-1) rectangular grids;
the concrete bridge deck comprises (N-1) × (M-1) precast concrete plates 3, and the (N-1) × (M-1) precast concrete plates 3 are respectively laid on (N-1) × (M-1) rectangular grids;
wherein N, M are all positive integers greater than 1.
The hot-rolled H-shaped longitudinal beam steel and the hot-rolled H-shaped transverse beam steel of the embodiment are rolled in a steel mill, are integral sections, avoid steel plate welding and greatly reduce engineering cost. Preferably, the hot-rolled H-shaped steel main beam 1 is formed by splicing a plurality of hot-rolled H-shaped longitudinal beam steel heads and tails.
In addition, preferably, in an embodiment of the present invention, the thickness of the precast concrete slab 3 is 22cm to 25 cm.
In addition, preferably, in an embodiment of the present invention, a paving layer is further laid on the concrete deck.
In addition, preferably, referring to fig. 4, in an embodiment of the present invention, the hot-rolled H-shaped longitudinal beam steel and the hot-rolled H-shaped beam steel all include an upper flange, a lower flange and a web, the upper end of the web is perpendicularly connected to the middle of the upper flange, the lower end of the web is perpendicularly connected to the middle of the lower flange, the upper flange, the lower flange and the web are of an integral structure, the width of the upper flange is smaller than that of the lower flange, and the thickness of the upper flange is smaller than that of the lower flange.
The upper flange and the lower flange of the hot-rolled H-shaped steel in the prior art are symmetrical about the web, and the section size of the hot-rolled H-shaped steel does not meet the stress requirement of the composite beam. The embodiment provides an economical and reasonable asymmetric section according to the requirement, namely the upper flange is relatively narrow and thin, and the lower flange is relatively wide and thick; in the embodiment, the hot-rolled H-shaped longitudinal beam steel and the hot-rolled H-shaped transverse beam steel both adopt the economic and reasonable asymmetric cross sections which accord with the structural stress characteristics, and the engineering materials are saved on the premise of meeting the structural stress.
In addition, preferably, in an embodiment of the present invention, the upper flanges of the hot-rolled H-shaped beam steel and the hot-rolled H-shaped beam steel are located on the same horizontal plane.
In addition, preferably, in an embodiment of the present invention, adjacent precast concrete plates 3 are connected by a wet joint 4, the wet joint 4 is located in the top flange top of the hot-rolled H-shaped longitudinal beam steel and the hot-rolled H-shaped beam steel, and the wet joint 4 width at the top flange of the hot-rolled H-shaped longitudinal beam steel is smaller than the top flange width of the hot-rolled H-shaped longitudinal beam steel, and the wet joint 4 width at the top flange of the hot-rolled H-shaped beam steel is smaller than the top flange width of the hot-rolled H-shaped beam steel.
The concrete bridge deck is composed of a plurality of precast concrete plates 3 and is connected into a whole through wet joints 4, a cast-in-place support is avoided being erected, the construction efficiency of the bridge deck is improved, and the assembly construction of the bridge deck structure is realized.
Preferably, a plurality of preformed holes are formed in the precast concrete plates 3 on the two side edges of the composite beam along the bridge direction, the preformed holes are formed in the hot-rolled H-shaped longitudinal beam steel on the two side edges of the composite beam, shear connectors 5 are arranged in the top of the upper flange of the hot-rolled H-shaped longitudinal beam steel and the preformed holes, and concrete is cast in situ in the preformed holes.
In addition, preferably, in an embodiment of the present invention, a shear connector 5 is disposed in the wet seam 4, and the shear connector 5 is welded to the upper flanges of the hot-rolled H-shaped girder steel and the hot-rolled H-shaped girder steel, respectively. Preferably, the shear connectors 5 are studs.
In addition, preferably, in an embodiment of the present invention, the width of the upper flange of the hot-rolled H-shaped beam steel is 400mm to 600mm, the thickness of the upper flange is 20mm to 32mm, the width of the lower flange is 500mm to 800mm, the thickness of the lower flange is 28mm to 48mm, the height of the web is 1200mm to 1600mm, and the thickness of the web is 24mm to 32 mm.
The hot-rolled H-shaped steel in the prior art is widely applied to temporary structures for bridge construction, the upper flanges and the lower flanges are symmetrical about a web, and the maximum specification is 1118mm multiplied by 405 mm. The hot-rolled H-shaped longitudinal beam steel is an asymmetric section with a narrow and thin upper flange and a wide and thick lower flange, the height of the section is 1200-1600 mm, the thickness of a web plate is 24-32 mm, the width of the upper flange is 400-600 mm, the thickness of the upper flange is 20-32 mm, the width of the lower flange is 500-800 mm, and the thickness of the lower flange is 28-48 mm, so that the stress requirement of a 30-40 m common span composite beam for a highway and an urban bridge is met, and the section structure is economic and reasonable.
Preferably, the specification of the hot-rolled H-shaped beam steel is smaller than that of the hot-rolled H-shaped longitudinal beam steel, and the specification of the hot-rolled H-shaped beam steel at the midspan position is smaller than that of the hot-rolled H-shaped beam steel at the fulcrum.
In addition, preferably, in an embodiment of the present invention, where the hot-rolled H-shaped beam steel meets the hot-rolled H-shaped beam steel, the joint plate 6 is perpendicularly welded on the web of the hot-rolled H-shaped beam steel, and the joint plate 6 and the web of the hot-rolled H-shaped beam steel are located on the same plane and are fixedly connected through the connecting plate 7 and the bolt.
In addition, preferably, in an embodiment of the present invention, the horizontal distance between adjacent hot-rolled H-beam girders 1 is 2.0m to 3.5m, and the horizontal distance between adjacent hot-rolled H-beam girders 2 is 6m to 8 m.
In addition, in the technical scheme of the embodiment, the transverse connection systems are respectively arranged between the adjacent hot-rolled H-shaped steel main beams 1 at the supporting positions and are required to have enough rigidity, and the transverse connection systems are arranged at other positions as required to avoid the side torsion instability of the hot-rolled H-shaped steel main beams 1. The necessary transverse connections are provided before the installation of the precast concrete panels 3 to ensure that no overall instability occurs during construction.
The hot-rolled H-shaped steel-concrete composite beam realizes standardized design, factory prefabrication and assembly construction, is green and environment-friendly, promotes the development of novel steel in China, is favorable for the popularization of the steel-concrete composite beam, and implements the development concept of thirteen-five innovation, coordination, green, openness and sharing in China.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.
Claims (8)
1. A hot-rolled H-shaped steel-concrete composite beam is characterized by comprising a steel longitudinal beam structure, a steel cross beam structure and a concrete bridge deck;
the steel longitudinal beam structure comprises N hot-rolled H-shaped steel main beams which are longitudinally arranged at intervals; each hot-rolled H-shaped steel main beam consists of one or more pieces of hot-rolled H-shaped longitudinal beam steel;
the steel beam structure comprises M hot-rolled H-shaped steel beams arranged at intervals transversely, and each hot-rolled H-shaped steel beam comprises N-1 sections of hot-rolled H-shaped beam steel; the N-1 sections of hot-rolled H-shaped beam steel are respectively positioned between N hot-rolled H-shaped steel main beams, and the N hot-rolled H-shaped steel main beams and M hot-rolled H-shaped steel beams jointly form (N-1) × (M-1) rectangular grids;
the concrete bridge deck comprises (N-1) × (M-1) precast concrete plates, and the (N-1) × (M-1) precast concrete plates are respectively laid on the (N-1) × (M-1) rectangular grids;
wherein N, M are all positive integers greater than 1.
2. The hot-rolled H-shaped steel and concrete composite beam as claimed in claim 1, wherein the hot-rolled H-shaped longitudinal beam steel and the hot-rolled H-shaped beam steel each comprise an upper flange, a lower flange and a web, the upper end of the web is vertically connected with the middle of the upper flange, the lower end of the web is vertically connected with the middle of the lower flange, the upper flange, the lower flange and the web are of an integral structure, the width of the upper flange is smaller than that of the lower flange, and the thickness of the upper flange is smaller than that of the lower flange.
3. The hot rolled H-section steel and concrete composite beam as claimed in claim 2, wherein upper flanges of the hot rolled H-section stringer steel and the hot rolled H-section stringer steel are on the same horizontal plane.
4. The hot rolled H-shaped steel and concrete composite beam as claimed in claim 3, wherein the adjacent precast concrete slabs are connected through a wet joint, the wet joint is located at the top of the upper flanges of the hot rolled H-shaped longitudinal beam steel and the hot rolled H-shaped beam steel, the wet joint width at the top of the upper flanges of the hot rolled H-shaped longitudinal beam steel is smaller than the width of the upper flanges of the hot rolled H-shaped longitudinal beam steel, and the wet joint width at the top of the upper flanges of the hot rolled H-shaped beam steel is smaller than the width of the upper flanges of the hot rolled H-shaped beam steel.
5. The hot rolled H-section steel and concrete composite beam as claimed in claim 4, wherein shear connectors are provided in the wet joints, the shear connectors being welded to upper flanges of the hot rolled H-section stringer steel and the hot rolled H-section stringer steel, respectively.
6. The hot-rolled H-shaped steel and concrete composite beam as claimed in claim 2, wherein the hot-rolled H-shaped longitudinal beam steel has an upper flange width of 400mm to 600mm, an upper flange thickness of 20mm to 32mm, a lower flange width of 500mm to 800mm, a lower flange thickness of 28mm to 48mm, a web height of 1200mm to 1600mm, and a web thickness of 24mm to 32 mm.
7. The hot-rolled H-shaped steel and concrete composite beam as claimed in claim 1, wherein a joint plate is vertically welded to a web of the hot-rolled H-shaped longitudinal beam steel at a joint of the hot-rolled H-shaped longitudinal beam steel and the hot-rolled H-shaped beam steel, and the joint plate and the web of the hot-rolled H-shaped beam steel are located on the same plane and fixedly connected through a connecting plate and a bolt.
8. The hot-rolled H-shaped steel and concrete composite beam as claimed in claim 1, wherein the horizontal distance between adjacent hot-rolled H-shaped steel main beams is 2.0-3.5 m, and the horizontal distance between adjacent hot-rolled H-shaped steel cross beams is 6-8 m.
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| CN201920644409.5U CN210288074U (en) | 2019-05-07 | 2019-05-07 | Hot-rolled H-shaped steel-concrete composite beam |
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| CN201920644409.5U CN210288074U (en) | 2019-05-07 | 2019-05-07 | Hot-rolled H-shaped steel-concrete composite beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184891A (en) * | 2019-05-07 | 2019-08-30 | 中铁工程设计咨询集团有限公司 | A kind of hot-rolling H-shaped steel reinforced concrete combination beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184891A (en) * | 2019-05-07 | 2019-08-30 | 中铁工程设计咨询集团有限公司 | A kind of hot-rolling H-shaped steel reinforced concrete combination beam |
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