A double-layer curved triangular truss structure

Abstract

This application relates to a double-layer curved triangular truss structure, including an upper crossbeam, a lower crossbeam opposite to the upper crossbeam, upper chords on both sides of the upper crossbeam, lower chords on both sides of the lower crossbeam, and diagonal members. An upper node plate connects any two adjacent upper chords; a lower node plate connects any two adjacent lower chords; diagonal members connect the upper and lower node plates, thus connecting the upper chords, lower chords, and diagonal members into a single unit to form a triangular truss. The lower node plate is a bent node plate, and the upper chord corresponding to the lower node plate in the vertical direction is also a bent chord. This invention provides a double-layer curved triangular truss structure, with a bent lower node plate and corresponding bent upper chords, achieving the curved function of a double-layer bridge deck. The upper chords, lower chords, and diagonal members form a stable triangular truss structure. The entire bridge facade has no vertical members, only diagonal members, resulting in good stability and low steel consumption.

Description

Technical Field

[0001] This application relates to the field of bridge engineering technology, specifically to a double-layer curved triangular truss structure. Background Technology

[0002] Currently, the requirements for the alignment of high-grade highways are becoming increasingly stringent, such as requiring bridge designs to fully conform to the alignment. Consequently, the application of curved steel truss structures is becoming more and more common. For steel trusses, each member is a rigid structure. In order to meet the curved alignment and to consider construction feasibility, a Warren-style truss structure with added vertical members is usually adopted, with bends at the upper and lower ends of the vertical members.

[0003] Because the addition of vertical members to the Warren truss structure increases the area to bear lateral wind loads, it is detrimental to the structure's wind resistance performance. The overall strength of the structure is low, the stability of the Warren truss is weak, and the large number of added vertical members will also lead to a sharp increase in the amount of steel used. Summary of the Invention

[0004] This application provides a double-layer curved triangular truss structure to solve the technical problems in related technologies where the addition of vertical members to the Warren truss structure to meet the curved shape results in low structural strength, weak stability, and increased steel consumption.

[0005] This application provides a double-layer curved triangular truss structure, which includes an upper crossbeam, a lower crossbeam opposite to the upper crossbeam, upper chords on both sides of the upper crossbeam, lower chords on both sides of the lower crossbeam, and diagonal members.

[0006] An upper node plate connects any two adjacent upper chord members; a lower node plate connects any two adjacent lower chord members; and a diagonal member connects the upper node plate and the lower node plate, so that the upper chord members, lower chord members, and diagonal member are connected as a whole to form a triangular truss.

[0007] The lower node plate is a bent node plate, and the upper chord corresponding to the lower node plate in the vertical direction is a bent chord.

[0008] In some embodiments, the lower node plate is bent at the same angle as the corresponding upper chord.

[0009] In some embodiments, adjacent upper chords are bent at the same angle.

[0010] In some embodiments, the lower chord between two adjacent lower node plates is a straight bar, and the upper node between two adjacent upper chords is a straight plate.

[0011] In some embodiments, for each segment, the broken line lengths of the upper chord and the lower chord are in the following relationship: outer side truss > middle truss > inner side truss.

[0012] In some embodiments, in each segment, the upper chord, lower chord, and diagonal bar are on a single plane.

[0013] In some embodiments, the upper crossbeam includes an upper node crossbeam and an upper inter-segment crossbeam, both of which are bolted to the upper chord. At the connection point, both the upper node crossbeam and the upper inter-segment crossbeam are perpendicular to the upper chord.

[0014] In some embodiments, the lower crossbeam includes a lower node crossbeam and a lower inter-section crossbeam. Both the lower node crossbeam and the lower inter-section crossbeam are bolted to the lower chord. At the connection point, the lower node crossbeam is not perpendicular to the lower chord, while at the connection point, the lower inter-section crossbeam is perpendicular to the lower chord.

[0015] In some embodiments, the upper bridge deck is supported on the upper crossbeam, and the upper bridge deck is bent in the same direction and at the same angle as the upper chord; the lower bridge deck is supported on the lower crossbeam, and the lower bridge deck is bent in the same direction and at the same angle as the lower node plate.

[0016] This application embodiment also provides a double-layer curved triangular truss structure, the double-layer curved triangular truss structure including an upper crossbeam, a lower crossbeam disposed opposite to the upper crossbeam, upper chords disposed on both sides of the upper crossbeam, lower chords disposed on both sides of the lower crossbeam, and diagonal members;

[0017] An upper node plate connects any two adjacent upper chord members; a lower node plate connects any two adjacent lower chord members; and a diagonal member connects the upper node plate and the lower node plate, so that the upper chord members, lower chord members, and diagonal member are connected as a whole to form a triangular truss.

[0018] The upper node plate is a bent node plate, and the lower chord corresponding to the upper node plate in the vertical direction is a bent chord.

[0019] The beneficial effects of the technical solution provided in this application include:

[0020] This application provides a double-layer curved triangular truss structure. The lower node plate is bent instead of curved, and the upper chord corresponding to the lower node plate in the vertical direction is also bent instead of curved, thus satisfying the curved shape and realizing the curved function of the double-layer bridge deck. Moreover, the upper chord, lower chord, and diagonal members form a stable triangular truss structure. The entire bridge facade has no vertical members, only diagonal members, which has excellent stress performance, good stability, and small steel consumption. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the elevation structure of a double-layer curved triangular truss structure in one embodiment of the present invention.

[0023] Figure 2 This is a side view of a double-layer curved triangular truss structure in one embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the upper beam and upper chord in one embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the lower crossbeam and lower chord in one embodiment of the present invention.

[0026] Figure label:

[0027] 1. Upper beam; 11. Upper node beam; 12. Upper inter-section beam; 2. Lower beam; 21. Lower node beam; 22. Lower inter-section beam; 3. Upper chord; 31. Upper node plate; 4. Lower chord; 41. Lower node plate; 5. Diagonal member. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] like Figure 1 and Figure 2 As shown, where, Figure 1 This is a schematic diagram of the elevation structure of a double-layer curved triangular truss structure in one embodiment of the present invention. Figure 2 This is a side view of a double-layer curved triangular truss structure in one embodiment of the present invention.

[0030] This application provides a double-layer curved triangular truss structure, which includes an upper crossbeam 1, a lower crossbeam 2 opposite to the upper crossbeam 1, upper chords 3 on both sides of the upper crossbeam 1, lower chords 4 on both sides of the lower crossbeam 2, and diagonal members 5.

[0031] Any two adjacent upper chord members 3 are connected by an upper node plate 31; any two adjacent lower chord members 4 are connected by a lower node plate 41; and a diagonal member 5 is connected between the upper node plate 31 and the lower node plate 41, so that the upper chord members 3, lower chord members 4, and diagonal members 5 are connected as a whole to form a triangular truss.

[0032] Among them, the lower node plate 41 is a bent node plate, and the upper chord 3 corresponding to the lower node plate 41 in the vertical direction is a bent chord.

[0033] This application provides a double-layer curved triangular truss structure. The lower node plate is bent instead of curved, and the upper chord corresponding to the lower node plate in the vertical direction is also bent instead of curved, thus satisfying the curved shape and realizing the curved function of the double-layer bridge deck. Moreover, the upper chord, lower chord, and diagonal members form a stable triangular truss structure. The entire bridge facade has no vertical members, only diagonal members, which has excellent stress performance, good stability, and small steel consumption.

[0034] like Figure 1 As shown, the double-layer curved triangular beam structure has three trusses, which increases the bridge's traffic capacity. Of course, the double-layer curved triangular beam structure can also have two trusses, which would make the structure simpler.

[0035] It should be noted that, Figure 1 and Figure 2 The line at the center of the lower node plate 41 is the bending center line, and the line at the center of the upper chord 3, which corresponds to the lower node plate 41 in the vertical direction, is also the bending center line.

[0036] like Figure 1 and Figure 3 As shown, Figure 3 This is a schematic diagram of the upper beam and upper chord in one embodiment of the present invention.

[0037] In some embodiments, the upper crossbeam 1 includes an upper node crossbeam 11 and an upper inter-segment crossbeam 12. Both the upper node crossbeam 11 and the upper inter-segment crossbeam 12 are bolted to the upper chord 3. At the connection point, both the upper node crossbeam 11 and the upper inter-segment crossbeam 12 are perpendicular to the upper chord 3.

[0038] The upper node crossbeam 11 and the upper inter-segment crossbeam 12 are not bent. When the length of the upper chord 3 is the same, except for the upper inter-segment crossbeams 12 on both sides of the bending center line of the upper chord 3, the longitudinal bridge spacing of the other upper inter-segment crossbeams 12 and the upper node crossbeam 11 is the same. Of course, the upper chord 3 can also be of different lengths, and the longitudinal bridge spacing of the upper node crossbeam 11 and the upper inter-segment crossbeam 12 can also be different.

[0039] like Figure 1 and Figure 4 As shown, Figure 4 This is a schematic diagram of the lower crossbeam and lower chord in one embodiment of the present invention.

[0040] In some embodiments, the lower crossbeam 2 includes a lower node crossbeam 21 and a lower inter-section crossbeam 22. Both the lower node crossbeam 21 and the lower inter-section crossbeam 22 are bolted to the lower chord 4. At the connection point, the lower node crossbeam 21 is not perpendicular to the lower chord 4; at the connection point, the lower inter-section crossbeam 22 is perpendicular to the lower chord 4.

[0041] The lower node crossbeam 21 and the lower inter-segment crossbeam 22 are not bent. When the length of the lower chord 4 is the same, the longitudinal bridge spacing of all the lower inter-segment crossbeams 22 is the same, and the included angle between the lower node crossbeam 21 and the lower chord 4 is half the bending angle of the lower node plate 41. Of course, the lower chord 4 can also be of different lengths, and the longitudinal bridge spacing of the lower inter-segment crossbeams 22 can be different.

[0042] In some embodiments, the upper bridge deck (not shown) is supported on the upper crossbeam 1, and the upper bridge deck is bent in the same direction and at the same angle as the upper chord 3; the lower bridge deck (not shown) is supported on the lower crossbeam 2, and the lower bridge deck is bent in the same direction and at the same angle as the lower node plate.

[0043] Both the upper and lower bridge decks are steel bridge decks with a dense crossbeam system. By setting the lower node plate as a bent node plate and the corresponding upper chord as a bent chord, the curved function of the double-layer bridge deck is realized, while the stiffness also meets the requirements.

[0044] Any two adjacent upper chord members 3 are connected by an upper node plate 31.

[0045] Specifically, each upper chord 3 is bolted to the upper node plate 31 at both ends, and each end of the upper node plate 31 is connected to an upper chord 3, thereby connecting multiple upper chords 3 into one unit.

[0046] In some embodiments, adjacent upper chords 3 are bent at the same angle, which facilitates design and construction.

[0047] In some embodiments, the upper node plate 31 between two adjacent upper chords 3 is a straight plate.

[0048] In some embodiments, for each segment, the broken line length relationship of the upper chord 3 is outer side truss > middle truss > inner side truss.

[0049] A lower node plate 41 connects any two adjacent lower chord members 4.

[0050] Specifically, each lower chord 4 is bolted to the lower node plate 41 at both ends, and each end of the lower node plate 41 is connected to a lower chord 4, thereby connecting multiple lower chords 4 into one unit.

[0051] The lower node plate 41 at each node is a bent node plate, and the bending angle is determined by the radius of curvature of the route.

[0052] In some embodiments, the lower node plate 41 is bent at the same angle as the corresponding upper chord 3.

[0053] In some embodiments, the lower chord 4 between two adjacent lower node plates 41 is a straight bar.

[0054] In some embodiments, for each segment, the broken line length relationship of the lower chord 4 is outer side truss > middle truss > inner side truss.

[0055] like Figure 1 and Figure 2 As shown, a diagonal brace 5 connects the upper node plate 31 and the lower node plate 41, so that the upper chord 3, the lower chord 4, and the diagonal brace 5 are connected as a whole to form a triangular truss.

[0056] Specifically, each diagonal member 5 is bolted to the adjacent upper node plate 31 and lower node plate 41 at both ends, so that the upper chord 3, lower chord 4 and diagonal member 5 are connected as a whole to form a triangular truss.

[0057] In some embodiments, in each segment, the upper chord 3, the lower chord 4, and the diagonal bar 5 are on a plane.

[0058] This application embodiment also provides a double-layer curved triangular truss structure, which includes an upper crossbeam, a lower crossbeam opposite to the upper crossbeam, upper chords on both sides of the upper crossbeam, lower chords on both sides of the lower crossbeam, and diagonal members.

[0059] Any two adjacent upper chord members are connected by an upper node plate; any two adjacent lower chord members are connected by a lower node plate; and diagonal members are connected between the upper node plate and the lower node plate, so that the upper chord members, lower chord members, and diagonal members are connected as a whole to form a triangular truss.

[0060] Among them, the upper node plate is a bent node plate, and the lower chord corresponding to the upper node plate in the vertical direction is a bent chord.

[0061] Those skilled in the art can select either the upper or lower node plate as a bent node plate according to actual needs.

[0062] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the method or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0063] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0064] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A double-layer curved triangular truss beam structure, characterized by, The double-layer curved triangular truss structure comprises an upper layer crossbeam (1), a lower layer crossbeam (2) oppositely arranged with the upper layer crossbeam (1), an upper chord (3) arranged on both sides of the upper layer crossbeam (1), a lower chord (4) arranged on both sides of the lower layer crossbeam (2), and a diagonal rod (5); Any two adjacent upper chords (3) are connected with an upper layer node plate (31); any two adjacent lower chords (4) are connected with a lower layer node plate (41); the upper layer node plate (31) and the lower layer node plate (41) are connected with the diagonal rod (5), so that the upper chord (3), the lower chord (4) and the diagonal rod (5) are connected into one body to form a triangular truss; The lower layer node plate (41) is a bent node plate, and the upper chord (3) corresponding to the lower layer node plate (41) in the vertical direction is a bent chord; the lower layer node plate (41) and the corresponding upper chord (3) are bent at the same angle; adjacent upper chords (3) are bent at the same angle. The upper layer crossbeam (1) comprises an upper layer node crossbeam (11) and an upper layer inter-node crossbeam (12), and the upper layer node crossbeam (11) and the upper layer inter-node crossbeam (12) are both bolted with the upper chord (3), and at the connection position, the upper layer node crossbeam (11) and the upper layer inter-node crossbeam (12) are both perpendicular to the upper chord (3); The lower layer crossbeam (2) comprises a lower layer node crossbeam (21) and a lower layer inter-node crossbeam (22), and the lower layer node crossbeam (21) and the lower layer inter-node crossbeam (22) are both bolted with the lower chord (4), and at the connection position, the lower layer node crossbeam (21) is not perpendicular to the lower chord (4), and at the connection position, the lower layer inter-node crossbeam (22) is perpendicular to the lower chord (4).

2. A double-curved triangular truss beam structure according to claim 1, wherein The lower chord (4) between two adjacent lower layer node plates (41) is a straight rod, and the upper layer node plate (31) between two adjacent upper chords (3) is a straight plate.

3. A double-curved triangular truss beam structure according to claim 1, wherein In each segment, the length relationship of the fold lines of the upper chord (3) and the lower chord (4) is outer side edge truss > middle truss > inner side edge truss.

4. A double-curved triangular truss beam structure according to claim 1, wherein In each segment, the upper chord (3), the lower chord (4) and the diagonal rod (5) are in one plane.

5. A double-layer curved triangular truss beam structure according to claim 1, wherein An upper layer bridge deck is supported on the upper layer crossbeam (1), and the upper layer bridge deck is bent at the same angle in the same direction as the upper chord (3); a lower layer bridge deck is supported on the lower layer crossbeam (2), and the lower layer bridge deck is bent at the same angle in the same direction as the lower layer node plate (41).

6. A double-curved triangular truss beam structure, characterized by The double-layer curved triangular truss structure comprises an upper layer crossbeam (1), a lower layer crossbeam (2) oppositely arranged with the upper layer crossbeam (1), an upper chord (3) arranged on both sides of the upper layer crossbeam (1), a lower chord (4) arranged on both sides of the lower layer crossbeam (2), and a diagonal rod (5); Any two adjacent upper chords (3) are connected with an upper node plate (31); any two adjacent lower chords (4) are connected with a lower node plate (41); the upper node plate (31) and the lower node plate (41) are connected with the inclined rod (5), so that the upper chord (3), the lower chord (4) and the inclined rod (5) are connected as a whole to form a triangular truss. Wherein, the upper node plate (31) is a bending node plate, and the lower chord (4) corresponding to the upper node plate (31) in the vertical direction is a bending chord.

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