CN216379112U - High type bailey frame that shears - Google Patents
High type bailey frame that shears Download PDFInfo
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- CN216379112U CN216379112U CN202122772783.3U CN202122772783U CN216379112U CN 216379112 U CN216379112 U CN 216379112U CN 202122772783 U CN202122772783 U CN 202122772783U CN 216379112 U CN216379112 U CN 216379112U
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- bailey truss
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Abstract
The application relates to the technical field of bridge construction, in particular to a high shear-resistant Bailey truss. The high shear-resistant Bailey truss comprises a Bailey truss body. The bailey truss comprises a bailey truss body, a bailey truss body and a connecting rod, wherein the bailey truss body comprises an upper chord, a lower chord, a vertical rod and an inclined rod; wherein, the cross-section of the diagonal rod on the horizontal plane is rectangular. The utility model provides a high-shear-resistance Bailey truss, and solves the problem that an original Bailey truss is weak in shear resistance and cannot be applied to the field of bridge construction requiring large load capacity in the related technology.
Description
Technical Field
The application relates to the technical field of bridge construction, in particular to a high shear-resistant Bailey truss.
Background
The Bailey bridge is the most popular bridge with wide application in the world at present, and has the characteristics of simple structure, convenient transportation, quick erection and easy decomposition. The Bailey truss is also called as an assembled highway steel bridge and is a main part for forming the Bailey bridge; the device can form various types and purposes of temporary bridges, emergency bridges and fixed bridges according to actual needs, and has the characteristics of few components, light weight and low cost.
In the related art, as a combat readiness steel bridge, in most cases, the span of the bridge and the number of the bailey frames are designed by the allowable bending moment, and the shear members of the original standard bailey frames are designed to be weak.
However, in the field of bridge construction, the load is much larger, the deformation control is strict, the span is relatively small, and the problem that the shear resistance of the bailey truss is required to be enhanced can be solved only by increasing the number of the bailey trusses, so that huge waste is caused.
Disclosure of Invention
The embodiment of the application provides a high shear-resistant Bailey truss to solve the problem that the original standard Bailey truss in the related art is weak in capacity and cannot be applied to bridge construction requiring large load capacity.
In a first aspect, there is provided a high shear-resistant bailey truss comprising:
the bailey truss comprises a bailey truss body, wherein the bailey truss body comprises an upper chord, a lower chord, a vertical bar and an inclined bar, the upper chord is positioned above the lower chord, the upper end and the lower end of the inclined bar are respectively connected with the upper chord and the lower chord, and the upper chord, the lower chord and the vertical bar are connected into a whole through the inclined bar;
the cross section of the inclined rod on the horizontal plane is rectangular.
In some embodiments, the cross-section of the vertical rod is rectangular, and the plane of the cross-section is perpendicular to the length direction of the vertical rod.
In some embodiments, the cross section of the diagonal rods and the vertical rods is rectangular or square.
In some embodiments, the upper chord and the lower chord are two channel steels, one end of each chord is welded with a female head, the other end of each chord is welded with a male head, and the female head on the upper chord and the female head on the lower chord are located on the same side of the bailey truss body.
In some embodiments, the female head and the male head are dovetail shaped.
In some embodiments, a beam base plate is welded to the lower chord, and wind hook holes are respectively formed in two ends of the lower chord, which are close to the female head and the male head.
In some embodiments, the upper chord is provided with an upper chord hole and an upper chord support bracket hole.
In some embodiments, the lower chord is provided with a lower chord hole and a lower chord support bracket hole.
In some embodiments, the vertical rod and the diagonal rod are both made of hollow steel pipes, two ends of the vertical rod are respectively connected with the upper chord and the lower chord, and the intersecting positions of the vertical rod and the diagonal rod are connected through a connecting plate.
In some embodiments, the vertical rod has a vertical rod support bracket hole and a cross beam clamp hole at both ends of the vertical rod.
The beneficial effect that technical scheme that this application provided brought includes: the section of the bailey truss inclined rod is replaced by an original I-shaped rod into a rectangular rod, so that the shearing resistance of the bailey truss is improved.
The embodiment of the application provides a high shear-resistant bailey truss, because the cross sections of the inclined rods and the vertical rods are changed from I-shaped to rectangular, the stability coefficient is obviously increased, the shear resistance is improved, and the overall weight of the bailey truss is basically not increased after replacement; in addition, the dovetail-shaped structures of the female head and the male head also increase the fatigue resistance of the Bailey truss during connection, so that the problem that the Bailey truss is weak in shearing resistance and cannot be used in the field of bridge construction requiring large load capacity is solved, and meanwhile, the service life is prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a front view of a high shear-resistant bailey truss provided in an embodiment of the present application;
fig. 2 is a plan view of an upper chord of a high shear-resistant bailey truss according to an embodiment of the present application;
fig. 3 is a plan view of a lower chord of a high shear-resistant bailey truss according to an embodiment of the present application;
fig. 4 is a side view of a high shear-resistant bailey truss according to an embodiment of the present application;
fig. 5 is a top view of a female end of a high shear-resistant bailey frame according to an embodiment of the present disclosure;
fig. 6 is a female front view of a high shear-resistant bailey truss according to an embodiment of the present application;
fig. 7 is a top view of a male head of a high shear-resistant bailey truss according to an embodiment of the present application;
fig. 8 is a front view of a male head of a high shear-resistant bailey truss according to an embodiment of the present application.
In the figure: 1. an upper chord; 11. an upper chord hole; 12. an upper chord support bracket hole; 2. a lower chord; 21. a lower chord hole; 22. a lower chord support bracket hole; 23. a beam base plate; 24. a wind hook hole; 3. a female head; 31. a female dovetail; 4. male head; 41. a male dovetail; 5. a vertical rod; 51. a vertical rod support frame hole; 52. a beam clamp hole; 6. a diagonal bar; 7. a connecting plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a high shear-resistant bailey truss, which can solve the problems that an original bailey truss in the related art is weak in shear resistance and cannot be applied to the field of bridge construction requiring large load capacity.
Referring to fig. 1, the present invention provides a high shear-resistant bailey truss, which includes a bailey truss body. The bailey truss comprises a bailey truss body and is characterized in that the bailey truss body comprises an upper chord 1, a lower chord 2, a vertical bar 5 and an inclined bar 6, wherein the upper chord 1 is positioned above the lower chord 2, the upper end and the lower end of the inclined bar 6 are respectively connected with the upper chord 1 and the lower chord 2, and the upper chord 1, the lower chord 2 and the vertical bar 5 are connected into a whole through the inclined bar 6;
wherein, the cross section of the diagonal rod 6 on the horizontal plane is rectangular.
Specifically, through the replacement of the cross section, the original I-shaped cross section is changed into the rectangular cross section, the turning radius of the rectangular cross section is far higher than the weak axis of the I-shaped cross section with the same mass, and the stable bearing capacity is larger, so that the shearing resistance is improved, the structure is simple, the novel anti-shearing device can be matched with a standard Bailey truss with rich market stock for use, and can also be replaced and used at a part with larger local shearing force.
In some preferred embodiments, the cross-section of the vertical bar 5 is rectangular, and the plane of the cross-section is perpendicular to the length direction of the vertical bar 5. Specifically, after the cross section of the diagonal rod 6 is replaced by a rectangle, the shear resistance of the bailey truss is continuously enhanced, and particularly, the cross section of the vertical rod 5 is also replaced by a rectangle, so that the shear resistance of the bailey truss is maximized.
In some preferred embodiments, the cross-sections of the diagonal member 6 and the vertical member 5 are rectangular or square.
In some preferred embodiments, referring to fig. 1, the upper chord 1 and the lower chord 2 are made of two channel steels, one end of each chord is welded with a female head 3, the other end is welded with a male head 4, and the female head 3 on the upper chord 1 and the female head 3 on the lower chord 2 are located on the same side of the bailey truss body.
Specifically, one end of each of the upper chord 1 and the lower chord 2 is a female head 3, the other end is a male head 4, and pin holes are formed in the female head 3 and the male head 4. When the two bailey frames are connected, the male head 4 of one bailey frame is inserted into the female head 3 of the other bailey frame, the pin holes are aligned, and the pins are inserted, so that the two bailey frames are installed.
In some preferred embodiments, the female head 3 and the male head 4 are of dovetail configuration, as shown in figures 5 to 8. Specifically, the junction of the female head 3 and the chord is the female dovetail 31, the junction of the male head 4 and the chord is the male dovetail 41, the dovetail structure can improve the fatigue resistance of the Bailey truss joint, and the Bailey truss joint is not easy to crack, so that the strength and the service life of the Bailey truss are enhanced.
In some preferred embodiments, referring to fig. 1, a beam backing plate 23 is welded on the lower chord 2, and wind hook holes 24 are respectively formed at two ends of the lower chord 2 close to the female head 3 and the male head 4. Specifically, the beam backing plate 23 is welded to the lower chord 2 for supporting and fixing the beam, and the wind hook hole 24 is used for connecting a wind-resistant pull rod.
In some preferred embodiments, as shown in fig. 2, the upper chord 1 is provided with an upper chord hole 11 and an upper chord support hole 12.
Specifically, when the upper chord hole 11 is used for splicing a double-layer or reinforcing a bridge, a bolt is inserted into the upper chord hole 11, so that the double-layer bailey truss or the bailey truss is connected with the reinforcing chord; the upper chord brace aperture 12 is used to mount a brace.
In some preferred embodiments, referring to FIG. 3, the lower chord 2 is provided with a lower chord aperture 21 and a lower chord brace aperture 22.
In some preferred embodiments, the vertical rod 5 and the diagonal rod 6 are both hollow steel pipes, two ends of the vertical rod 5 are respectively connected with the upper chord 1 and the lower chord 2, and the intersecting positions of the vertical rod 5 and the diagonal rod 6 are connected through a connecting plate 7.
Specifically, the intersection of the vertical rod 5 and the diagonal rod 6 is connected through a connecting plate 7, and the connecting plate 7 plays a role in fixing, so that the strength is further improved.
In some preferred embodiments, as shown in fig. 1 and 4, the vertical posts 5 are provided with post support bracket holes 51 and beam clamp holes 52 at each end.
Specifically, the vertical rod support frame hole 51 on the vertical rod 5 is used for installing a support frame and a connecting plate; the beam clamp holes 52 are used to mount the beam clamps.
In the highly shear-resistant bailey truss provided by the embodiment, because the cross sections of the vertical rods 5 and the diagonal rods 6 are changed from an i-shaped shape to a rectangular shape, compared with the original bailey truss, the stability coefficient of the diagonal rods is improved from 0.66 to 0.93, the shear resistance is improved by (0.93-0.66)/0.66 × 100% — 40%, and after replacement, the overall weight of the bailey truss is only increased by less than 3%, and basically no influence is caused; in addition, the female head 3 and the male head 4 are optimized, and the dovetail-shaped structures of the female head 3 and the male head 4 increase the fatigue resistance of the joint when the bailey truss is connected, so that the problem that the bailey truss is weak in shearing resistance and cannot be used in the field of bridge construction requiring large load capacity is solved, and meanwhile, the service life is prolonged.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A high shear resistant bailey truss, comprising: the bailey truss comprises a bailey truss body, wherein the bailey truss body comprises an upper chord (1), a lower chord (2), a vertical rod (5) and an inclined rod (6), the upper chord (1) is positioned above the lower chord (2), the upper end and the lower end of the inclined rod (6) are respectively connected with the upper chord (1) and the lower chord (2), and the upper chord (1), the lower chord (2) and the vertical rod (5) are connected into a whole through the inclined rod (6);
wherein the cross section of the inclined rod (6) on the horizontal plane is rectangular.
2. The high shear-resistant bailey truss of claim 1 wherein: the cross section of the vertical rod (5) is rectangular, and the plane of the cross section is perpendicular to the length direction of the vertical rod (5).
3. The high shear-resistant bailey truss of claim 1 wherein: the cross sections of the inclined rod (6) and the vertical rod (5) are rectangular or square.
4. The high shear-resistant bailey truss of claim 1 wherein: the upper chord (1) and the lower chord (2) are composed of two channel steel, one end of each chord is welded with a female head (3), the other end is welded with a male head (4), and the female head (3) on the upper chord (1) and the female head (3) on the lower chord (2) are positioned on the same side of the bailey truss body.
5. The high shear-resistant bailey truss of claim 4 wherein: the female head (3) and the male head (4) adopt a dovetail structure.
6. The high shear-resistant bailey truss of claim 4 wherein: the welding has crossbeam backing plate (23) on lower chord (2), lower chord (2) are close to cloudy head (3) with windy hook hole (24) are seted up respectively to the both ends of male head (4).
7. The high shear-resistant bailey truss of claim 1 wherein: the upper chord (1) is provided with an upper chord hole (11) and an upper chord support frame hole (12).
8. The high shear-resistant bailey truss of claim 1 wherein: and a lower chord hole (21) and a lower chord support frame hole (22) are formed in the lower chord (2).
9. The high shear-resistant bailey truss of claim 1 wherein: the vertical rod (5) and the diagonal rod (6) are all hollow steel pipes, two ends of the vertical rod (5) are respectively connected with the upper chord (1) and the lower chord (2), and the crossing positions of the vertical rod (5) and the diagonal rod (6) are connected through a connecting plate (7).
10. The high shear-resistant bailey truss of claim 1 wherein: the two ends of the vertical rod (5) are provided with a vertical rod support frame hole (51) and a cross beam clamp hole (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122772783.3U CN216379112U (en) | 2021-11-12 | 2021-11-12 | High type bailey frame that shears |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122772783.3U CN216379112U (en) | 2021-11-12 | 2021-11-12 | High type bailey frame that shears |
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| Publication Number | Publication Date |
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| CN216379112U true CN216379112U (en) | 2022-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122772783.3U Active CN216379112U (en) | 2021-11-12 | 2021-11-12 | High type bailey frame that shears |
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| CN (1) | CN216379112U (en) |
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- 2021-11-12 CN CN202122772783.3U patent/CN216379112U/en active Active
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