CN111705618A - Combined beam of railway cable-stayed bridge - Google Patents
Combined beam of railway cable-stayed bridge Download PDFInfo
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- CN111705618A CN111705618A CN202010609611.1A CN202010609611A CN111705618A CN 111705618 A CN111705618 A CN 111705618A CN 202010609611 A CN202010609611 A CN 202010609611A CN 111705618 A CN111705618 A CN 111705618A
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- nail
- steel box
- beam body
- cable
- reinforcing
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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
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/268—Composite concrete-metal
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of composite beams of cable-stayed bridges, and discloses a composite beam of a railway cable-stayed bridge, which comprises an edge-span beam body and a mid-span beam body, wherein a composite section is arranged between the edge-span beam body and the mid-span beam body, the composite section comprises a hollow steel box, one side of the steel box is welded with the mid-span beam body, and the other side of the steel box is connected with the edge-span beam body; the side span beam body is including the concrete panel that is located the steel box top and the concrete slab that is located the steel box, fixedly connected with shearing nail on the steel box, and shearing nail includes nail axle and the nail body, and the epaxial welding of nail has the nail board with the vertical sliding connection of the nail body, and the below of nail board is provided with the buffer layer that is located the nail body, and the nail body is located concrete slab, and the nail axle is located the concrete panel. The invention has simple structure, can effectively reduce the acting force on the concrete panel, reduce the probability of deformation of the concrete panel and prolong the service life of the combined section.
Description
Technical Field
The invention relates to the technical field of composite beams of cable-stayed bridges, in particular to a composite beam of a railway cable-stayed bridge.
Background
The main beam of the cable-stayed bridge is generally made of steel and concrete, and the main beam can be divided into a steel beam, a concrete beam, a combined beam and a mixed beam according to different combinations of the two materials. The composite beam is composed of two materials of steel and concrete in the cross section and is a combination of different materials in the cross section. The composite beam has the advantages that the concrete slab is used for replacing an orthotropic steel bridge deck slab, the economy is good, the rigidity is high, the composite beam can be split into small components, and the transportation and the installation are easy. The composite beam cable-stayed bridge has good applicability within the span range of 300-600 m. However, the composite beam concrete slab is easily cracked by the transverse and vertical acting force for a long time, and the use of the composite beam is further influenced.
Disclosure of Invention
The invention aims to provide a composite beam of a railway cable-stayed bridge, so as to reduce the probability of cracking of a concrete panel of the composite beam of the cable-stayed bridge.
In order to achieve the purpose, the invention provides the following technical scheme: a composite beam of a railway cable-stayed bridge comprises an edge-span beam body and a mid-span beam body, wherein a composite section is arranged between the edge-span beam body and the mid-span beam body and comprises a hollow steel box, one side of the steel box is welded with the mid-span beam body, and the other side of the steel box is connected with the edge-span beam body;
the side span beam body is including the concrete panel that is located the steel box top and the concrete slab that is located the steel box, fixedly connected with shearing nail on the steel box, and shearing nail includes nail axle and the nail body, and the epaxial welding of nail has the nail board with the vertical sliding connection of the nail body, and the below of nail board is provided with the buffer layer that is located the nail body, and the nail body is located concrete slab, and the nail axle is located the concrete panel.
The principle and the beneficial effects of the invention are as follows: (1) the main reasons for the easy cracking of the existing concrete panels are as follows: the bond stress of the concrete panel and the steel box is different, so that the concrete panel and the steel box have horizontal action, and the concrete panel only bears acting force. The shear nails can be used for reinforcing the combination of the steel box and the concrete panel, so that the joint stress is realized, and the probability that the concrete panel is easy to crack under the independent stress is reduced.
(2) In this scheme, the shear force nail includes the nail body and the nail axle to at the internal buffer layer that sets up of nail, when the concrete panel received vertical effort, cushion the concrete panel through the buffer layer, take place the probability of deformation with the reduction concrete panel, consequently reduce the probability that the fracture took place for the concrete panel.
(3) Through the buffer layer, the vertical effort that the concrete panel received utilizes the buffer layer to cushion to reduce the effort that the concrete panel received, strengthen the intensity of concrete panel, and then reduce the probability of concrete panel fracture.
Further, the buffer layer is a non-Newtonian fluid.
Has the advantages that: the non-Newtonian fluid can become a hard object when being impacted quickly, and supports the concrete panel when being hardened, so that the supporting capacity of the concrete panel is enhanced. When the non-Newtonian fluid is under the action of a relatively slow acting force, the non-Newtonian fluid buffers the concrete panel, so that the action state of the concrete panel is adapted, and the acting force of the concrete panel is further reduced.
Furthermore, a plurality of supporting plates are arranged in the steel box, and through holes are formed in the supporting plates.
Has the advantages that: when the side span beam body is poured, concrete is poured into the steel box and can pass through the through holes, so that the concrete and the supporting plates are crossed, a similar grid shape is formed in the steel box, and the supporting capacity of the steel box is improved.
Further, the below of steel case is provided with the bearing plate, and the bearing plate includes plate body and end plate, and the end plate welds with the steel case, and the end plate below is provided with a plurality of buffer gear, and buffer gear includes the support and sets up the spout on the plate body, is provided with the second spring that offsets with the support in the spout, and the outside of spout is provided with and is used for sealing the spout and welds the baffle on the support.
Has the advantages that: under the action of the second spring, the second spring supports the support and the end plate, and when the combined section receives the action force, the second spring contracts to a certain degree so as to achieve the purpose of buffering the combined section, reduce the action force received by the concrete panel and the concrete slab and increase the strength of the combined section.
Further, the midspan girder body is a steel box girder.
Has the advantages that: the steel box girder is convenient for be connected with the steel box, and during the installation, the steel box girder stretches into in the steel box, and the contact surface is big and stability is high.
Furthermore, the both sides of midspan roof beam body all are provided with the reinforcing plate, and the one end welding of reinforcing plate is on the midspan roof beam body, and the other end welding of reinforcing plate is on the steel case.
Has the advantages that: the middle span beam body is supported through the reinforcing plate, and the strength of the middle span beam body is improved.
Furthermore, a reinforcing beam is arranged between the two reinforcing plates, and reinforcing shafts welded with the midspan beam body are welded on two sides of the reinforcing beam.
Has the advantages that: the strength of the midspan beam body is further improved by the reinforcing beam and the reinforcing shaft.
Furthermore, two reinforcing shafts on the reinforcing beam and the midspan beam body form a trapezoid with the upper width smaller than the lower width.
Has the advantages that: when the midspan beam body receives acting force, the trapezoidal structure supports the midspan beam body, and because two reinforcing shafts on the reinforcing beam and the midspan beam body form a trapezoid with a small upper part and a large lower part, the force bearing structure of the reinforcing shafts is more stable.
Furthermore, chord pull rods are fixed on two sides of the midspan beam body.
Has the advantages that: the chord pull rod further supports the midspan beam body, and the strength of the midspan beam body is improved.
Further, the chord pull rod comprises an inner shaft and an outer shaft, the inner shaft is located in the outer shaft, and a third spring which is abutted to the outer shaft is welded on the inner shaft.
Has the advantages that: when the chord pull rod is acted by the midspan beam body, the inner shaft and the outer shaft support on one hand, and the inner shaft and the third spring buffer on the other hand.
Drawings
FIG. 1 is a longitudinal cross-sectional view of a composite section in accordance with one embodiment of the present invention;
FIG. 2 is a right side view of FIG. 1;
FIG. 3 is an enlarged view of portion A of FIG. 1;
FIG. 4 is an enlarged view of portion B of FIG. 1;
FIG. 5 is a schematic structural view of a midspan girder and a pier;
fig. 6 is a right side view of fig. 5.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the middle-span beam body 1, the plate body 13, the baffle 131, the second spring 132, the bracket 133, the end plate 134, the concrete panel 2, the through hole 21, the concrete plate 22, the nail shaft 23, the nail plate 24, the non-Newtonian fluid 25, the steel box 26, the nail body 27, the pressure bearing plate 3, the reinforcing plate 31, the reinforcing plate 4, the reinforcing beam 41, the reinforcing shaft 42, the support shaft 43, the pier 7, the chord pull rod 71, the connecting plate 72 and the transverse plate 8.
The first embodiment is as follows:
basically, as shown in attached figures 1, 3 and 4, the composite beam of the railway cable-stayed bridge comprises an edge-span beam body and a mid-span beam body 1, wherein a composite section is arranged between the edge-span beam body and the mid-span beam body 1.
The combined section comprises a steel box 26, both sides of the steel box 26 are open, a plurality of supporting plates are welded in the steel box 26, and a plurality of through holes 21 are formed in the supporting plates. In order to facilitate the forming of the concrete slab 22, a transverse plate 8 is arranged below the steel box 26, side plates are welded on two sides of the transverse plate 8, a closing plate welded on the midspan beam body 1 is welded on the transverse plate 8, and the closing plate, the side plates and the transverse plate 8 form a closed cavity with an opening on the left side. The below of steel case 26 is provided with a plurality of bearing plates 3, bearing plates 3 include plate body 13, with plate body 13 welded end plate 134, reinforcing plate 31 all welds with plate body 13, end plate 134 is located the upper end of plate body 13 and is provided with buffer gear on end plate 134, buffer gear includes support 133 and the spout of opening at plate body 13, the upper end welding of support 133 is on end plate 134, the lower extreme of support 133 is located the spout and support 133 and the vertical sliding connection of spout, be provided with second spring 132 on the support 133, the both ends of second spring 132 are welded respectively on support 133 and plate body 13, the welding has the baffle 131 that is used for sealing the spout on the support 133, second spring 132 has the trend that upwards promotes support 133, guarantee through support 133 and baffle 131 when pouring the concrete, the concrete can not enter into in the spout. The midspan girder body 1 is a steel box 26 girder, the midspan girder body 1 extends into the steel box 26, and the midspan girder body 1 is welded on the steel box 26 and fixed through fastening bolts.
The side span beam body is cast with concrete and when the side span beam body is cast, the concrete enters the steel box 26 and the closed cavity to form the concrete slab 22. After the concrete passes through the through holes 21 and is solidified, the concrete is crossed with the supporting plates, so that a net structure is formed in the steel box 26, and the supporting capability of the steel box 26 is improved. Concrete panel 2 has been pour to the upper surface of steel case 26, be provided with the shear pin on the steel case 26, the shear pin includes nail axle 23 and nail body 27, on nail axle 23 welded steel case 26, nail axle 23 was located concrete panel 2, nail body 27 was located concrete panel 22, vertical sliding connection has nail board 24 in the nail body 27, nail board 24 and nail axle 23 welding, nail board 24 below is provided with the buffer layer, the buffer layer is any one in first spring or non-Newtonian fluid 25, the buffer layer is non-Newtonian fluid 25 in this embodiment.
The specific implementation process is as follows:
(1) when concrete panel 2 received the effort, concrete panel 2 cushions through the shear pin, and is specific: the pin shaft 23 acts on the non-newtonian fluid 25 through the pin plate 24, thereby achieving the purpose of cushioning. The shear pins can reduce the acting force of the concrete panel 2, the concrete slab 22 and the steel box 26, thereby ensuring the effective transmission of the shear force to prevent relative slippage between the two.
(2) When the combination section receives the effort, the combination section cushions through buffer gear, specifically: the force experienced by the end plate 134 is cushioned by the bracket 133 and the second spring 132 against the force experienced by the steel box 26, the concrete slab 22 and the concrete panel 2. Namely, the method is equivalent to: the second spring 132 applies a force to the concrete slab 22, the steel box 26 and the concrete panel 2 to form a pre-stress, so that the deformation probability of the combined section is reduced, the strength of the combined section is improved, that is, the deformation probability of the concrete panel 2 is reduced, and the cracking probability of the concrete panel 2 is reduced.
(3) When the combined section is acted, the reinforcing plate 31 reinforces the plate body 13, so that the strength of the plate body 13 is increased, and the overall strength of the combined section is improved.
Example two:
the second embodiment is different from the first embodiment in that, as shown in fig. 2, 5 and 6, the reinforcing plates 4 are welded on both sides of the midspan beam body 1, the reinforcing beam 41 is arranged between the reinforcing plates 4, both ends of the reinforcing beam 41 are respectively welded on the two reinforcing plates 4, the reinforcing shafts 42 are welded on both sides of the reinforcing beam 41, and the two reinforcing shafts 42 and the midspan beam body 1 form a trapezoid. The supporting shaft 43 is welded on the reinforcing beam 41, the supporting shaft 43 is welded with the midspan beam body 1, and the midspan beam body 1 is further supported through the supporting shaft 43.
The midspan girder body 1 further comprises a bridge pier 7, connecting plates 72 are welded on two sides of the midspan girder body 1, chord pull rods 71 are arranged on the connecting plates 72, each chord pull rod 71 comprises an inner shaft and an outer shaft, the inner shafts are located in the outer shafts and are in sliding connection with the outer shafts, and third springs welded with the outer shafts are welded on the inner shafts. The inner shaft is welded to the connecting plate 72, and the outer shaft is welded to the pier 7.
The specific implementation process is as follows:
when the midspan girder body 1 is subjected to an acting force, the reinforcing shaft 42 and the reinforcing beam 41 support the midspan girder body 1, and the strength of the midspan girder body 1 is larger because the reinforcing shaft 42 and the midspan girder body 1 form a trapezoid, and the width of the upper part of the trapezoid is smaller than that of the lower part. The strength of the mid-span beam body 1 is enhanced, and the acting force applied to the mid-span beam body 1 is reduced.
In this embodiment, the mid-span beam body 1 is further provided with the chord pull rod 71, when the mid-span beam body 1 receives an acting force, the acting force is transmitted to the outer shaft through the inner shaft, and the third spring is used for buffering, so that the whole mid-span beam body 1 is buffered, the acting force received by the mid-span beam body 1 is reduced, and the probability of deformation of the mid-span beam body 1 is reduced.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent. The techniques, shapes, and structural parts, which are omitted from the description of the present invention, are all known techniques.
Claims (10)
1. The utility model provides a combination beam of railway cable-stay bridge which characterized in that: the steel box comprises an edge-span beam body and a mid-span beam body, wherein a combined section is arranged between the edge-span beam body and the mid-span beam body and comprises a hollow steel box, one side of the steel box is welded with the mid-span beam body, and the other side of the steel box is connected with the edge-span beam body;
the side span beam body is including the concrete panel that is located the steel box top and the concrete slab that is located the steel box, fixedly connected with shearing nail on the steel box, and shearing nail includes nail axle and the nail body, and the epaxial welding of nail has the nail board with the vertical sliding connection of the nail body, and the below of nail board is provided with the buffer layer that is located the nail body, and the nail body is located concrete slab, and the nail axle is located the concrete panel.
2. The composite girder for cable-stayed railway bridges according to claim 1, wherein: the buffer layer is a non-Newtonian fluid.
3. The composite girder for cable-stayed railway bridges according to claim 1, wherein: a plurality of supporting plates are arranged in the steel box, and through holes are formed in the supporting plates.
4. The composite girder for cable-stayed railway bridges according to claim 1, wherein: the below of steel case is provided with the bearing plate, and the bearing plate includes plate body and end plate, and the end plate welds with the steel case, and the end plate below is provided with a plurality of buffer gear, and buffer gear includes the support and sets up the spout on the plate body, is provided with the second spring that offsets with the support in the spout, and the outside of spout is provided with and is used for sealing the spout and welds the baffle on the support.
5. The composite girder for cable-stayed railway bridges according to claim 1, wherein: the midspan girder body is a steel box girder.
6. The composite girder for cable-stayed railway bridges according to claim 5, wherein: the reinforcing plates are arranged on two sides of the midspan beam body, one end of each reinforcing plate is welded on the midspan beam body, and the other end of each reinforcing plate is welded on the steel box.
7. The composite girder for cable-stayed railway bridges according to claim 6, wherein: a reinforcing beam is arranged between the two reinforcing plates, and reinforcing shafts welded with the midspan beam body are welded on two sides of the reinforcing beam.
8. The composite girder for cable-stayed railway bridges according to claim 7, wherein: two reinforcing shafts on the reinforcing beam and the midspan beam body form a trapezoid with the upper width smaller than the lower width.
9. The composite girder for cable-stayed railway bridges according to claim 1, wherein: and string pull rods are fixed on two sides of the midspan beam body.
10. The composite girder for cable-stayed railway bridges according to claim 9, wherein: the string pull rod comprises an inner shaft and an outer shaft, the inner shaft is located in the outer shaft, and a third spring which is abutted to the outer shaft is welded on the inner shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010609611.1A CN111705618B (en) | 2020-06-29 | 2020-06-29 | Combined beam of railway cable-stayed bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010609611.1A CN111705618B (en) | 2020-06-29 | 2020-06-29 | Combined beam of railway cable-stayed bridge |
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| CN111705618A true CN111705618A (en) | 2020-09-25 |
| CN111705618B CN111705618B (en) | 2021-07-30 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10317324A (en) * | 1997-05-23 | 1998-12-02 | Shigeyuki Matsui | Beam bridge |
| JP2001011938A (en) * | 1999-06-30 | 2001-01-16 | Kawada Industries Inc | Shear preventive for coupling steel with concrete |
| JP2001342612A (en) * | 2000-06-02 | 2001-12-14 | Akimitsu Kurita | Joining device for floor slab and web steel plate |
| CN102359060A (en) * | 2011-07-20 | 2012-02-22 | 天津市市政工程设计研究院 | Structure of composite beam-concrete beam combined section |
| CN104294748A (en) * | 2014-09-23 | 2015-01-21 | 同济大学 | Joint section structure for hybrid beam cable-stayed bridge and construction method thereof |
-
2020
- 2020-06-29 CN CN202010609611.1A patent/CN111705618B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10317324A (en) * | 1997-05-23 | 1998-12-02 | Shigeyuki Matsui | Beam bridge |
| JP2001011938A (en) * | 1999-06-30 | 2001-01-16 | Kawada Industries Inc | Shear preventive for coupling steel with concrete |
| JP2001342612A (en) * | 2000-06-02 | 2001-12-14 | Akimitsu Kurita | Joining device for floor slab and web steel plate |
| CN102359060A (en) * | 2011-07-20 | 2012-02-22 | 天津市市政工程设计研究院 | Structure of composite beam-concrete beam combined section |
| CN104294748A (en) * | 2014-09-23 | 2015-01-21 | 同济大学 | Joint section structure for hybrid beam cable-stayed bridge and construction method thereof |
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| CN111705618B (en) | 2021-07-30 |
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