CN114837058A - Curve widen truss bridge structure - Google Patents
Curve widen truss bridge structure Download PDFInfo
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- CN114837058A CN114837058A CN202210589918.9A CN202210589918A CN114837058A CN 114837058 A CN114837058 A CN 114837058A CN 202210589918 A CN202210589918 A CN 202210589918A CN 114837058 A CN114837058 A CN 114837058A
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- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000007704 transition Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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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
- E01D6/00—Truss-type bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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Abstract
The invention discloses a curved line widening truss bridge structure which comprises a space main truss and a bridge deck system arranged on the space main truss, wherein the space main truss is composed of two trusses, the two trusses are symmetrically arranged along the center line of a bridge, the two trusses are wide through standard trusses, the truss width is gradually increased through a broken line, the truss width is gradually increased through the broken line, namely, the truss width between a left truss and a right truss at the outer end of a rear section is larger than the truss width at the outer end of a front section along the length direction of the two trusses, the two adjacent sections of main truss sections are connected, and the front section and the rear section are connected through a node angle folding section, so that the outer end of the rear section is outwards expanded. According to the invention, the bending widening arrangement of the space main truss is realized by replacing curves with straight lines, and the break angle of each node is optimized to be two break angle transitions, so that the node is positioned on a straight line section between the two break angles, the vertical rod is ensured to be a normal I-shaped section, and the difficulty in manufacturing and mounting matching of the rod piece is also reduced.
Description
Technical Field
The invention relates to the technical field of bridge structures, in particular to a curve-line-variable truss bridge structure.
Background
In the urban construction, bridges often span dense residential areas and commercial areas, on one hand, the removal is difficult, and particularly, the removal loss amount of a busy section is huge, so that the removal loss amount needs to be minimized according to the change of road alignment according to actual ground conditions. Under some special conditions, the bridge structure is also involved in the shaping, and the curve widening is one of the design forms.
In order to realize the widening of the bridge curve, a design idea of replacing curve with straight can be adopted, and the curve line shape of the bridge is realized through two sections of broken lines with different break angles. However, in the traditional design, the break angle is located in the center of the node, which requires that the flanges of the beam and the vertical bar located on the break angle node must form corresponding angles, so that the cross section of the vertical bar is unreasonable, and the difficulty in mounting and matching the beam, the vertical bar and the chord bar with irregular cross sections is high.
In view of the above, there is a need to improve the existing curved-line widening truss bridge structure to reduce the difficulty of manufacturing and installing and matching the members.
Disclosure of Invention
In view of the above-mentioned drawbacks, the present invention provides a curved widening truss bridge structure to solve the problem of difficulty in mounting and matching the cross beams, vertical bars, and chords in the prior art.
Therefore, the truss bridge structure with the widened curve comprises a space main truss and a bridge deck system arranged on the space main truss, wherein the space main truss is composed of two trusses, the two trusses are symmetrically arranged along the center line of a bridge, the two trusses are wide through standard trusses, the truss width is gradually increased through a folding line, the truss width is gradually increased through the folding line, namely, the truss width is gradually increased along the length direction of the two trusses, the adjacent two sections of main truss sections are connected, the front section is connected with the rear section through a node angle folding section, the outer end of the rear section is enabled to be expanded outwards, and the truss width between a left truss and a right truss which form the outer end of the rear section is larger than the truss width of the outer end of the front section.
In the above technical scheme, preferably, the truss includes preceding festival section, back festival section and first node dog-ear section, preceding festival section and back festival section are connected respectively to the front and back both ends of first node dog-ear section, and the first purlin width of preceding festival section is standard purlin width, and first node dog-ear section forms first dog-ear with the preceding festival section, and first node dog-ear section forms the second dog-ear with the back festival section, and the second purlin width of back festival section outer end is greater than first purlin width.
In the above technical solution, preferably, a plurality of middle segments are provided between the rear segments of the front segment, and two adjacent segments are connected by a node angle segment to form a structure that the fold line is widened many times.
In the above technical solution, preferably, a curved bridge center line is constructed by a plurality of corner sections and different corners formed by the plurality of corner sections, and a curved shape that is formed by a standard truss width, the truss width is gradually increased by the folding lines, and the center line is curved to one side is formed.
In the above technical scheme, preferably, the space main truss is in a height-variable N-shaped truss type, the two trusses are fixedly connected with the upper chord diamond truss type horizontal longitudinal connection through the cross beam, the upper chord and the lower chord in the trusses are in box-shaped cross sections, and the diagonal rods and the vertical rods are in king-shaped cross sections.
In the above technical solution, preferably, the bridge deck system is composed of bridge deck beams and orthotropic steel bridge deck plates, and the orthotropic steel bridge deck plates gradually increase the bridge width from the transverse standard width in a fold line manner to be matched with the space main girders.
In the above technical scheme, preferably, the chord members, the vertical members and the diagonal members are all connected and fixed by splicing plates and high-strength bolts.
In the above technical solution, preferably, the connection node of the diagonal bar, the vertical bar and the chord bar is located on a straight line segment between the first folding angle and the second folding angle; the upper parallel cross beam and the lower parallel cross beam at the node of each chord of the main truss exist independently of the node.
In the above technical solution, preferably, each section of the upper parallel cross beam and the lower parallel cross beam gradually decreases in size.
In the above technical scheme, preferably, the splice plates include diagonal splice plates, vertical splice plates, plate rib splice plates, cross beam splice plates, and upper parallel pair brace rod splice plates.
According to the technical scheme, the curve-widening truss bridge structure provided by the invention solves the problem that the installation matching difficulty of the cross beam, the vertical rod and the chord member is high in the prior art. Compared with the prior art, the invention has the following beneficial effects:
firstly, along the length direction of two trusses, two adjacent sections of main truss sections are connected through node dog-ear sections between the front section and the rear section, so that the outer end of the rear section is expanded outwards, and the truss width between the left truss and the right truss forming the outer end of the rear section is larger than that of the outer end of the front section. The bending widening of the space main truss is realized by using straight instead of curved parts, and each node break angle is optimized into two break angle transitions, so that the node is positioned on a straight line section between the two break angles, the vertical rod is ensured to be a normal I-shaped section, and the difficulty in manufacturing, installing and matching the rod piece is also reduced.
In addition, in a preferable scheme, the curve linearity of the truss structure is realized through the bending angle, and the widening of the space truss structure is realized through different bending angles of the two main trusses.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described and explained. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic plan view of an embodiment 1 of a curved widening truss bridge structure according to the present invention;
FIG. 2 is a schematic plan view of an embodiment 2 of a curved, broadened truss bridge structure according to the present disclosure;
FIG. 3 is a schematic plan view of an embodiment 2 of a curved, widening truss bridge structure according to the present invention;
FIG. 4 is an elevational view of the main girder of the present invention;
figure 5 is a plan layout of the deck system of the present invention.
In fig. 1-5, the parts are numbered as follows:
a left truss 10, a right truss 20;
the front section 11, the rear section 12, the first node angle folding section 13, the second node angle folding section 14 and the middle section 15;
a lower chord 21, a vertical bar 22, an inclined bar 23 and an upper chord 24;
a bridge deck beam 31 and an orthotropic steel bridge deck plate 32.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
The realization principle of the invention is as follows:
along the length direction of two trusses, two sections of adjacent main truss sections are connected through node dog-ear sections between preceding section and the back section for the outer end of back section outwards expands, forms the truss width between the left truss of back section outer end and the right truss and is greater than the truss width of preceding section outer end. The bending widening of the space main truss is realized by using straight instead of curved parts, and each node break angle is optimized into two break angle transitions, so that the node is positioned on a straight line section between the two break angles, the vertical rod is ensured to be a normal I-shaped section, and the difficulty in manufacturing, installing and matching the rod piece is also reduced.
In order to make the technical solution and implementation of the present invention more clearly explained and illustrated, several preferred embodiments for implementing the technical solution of the present invention are described below.
It should be noted that the terms of orientation such as "inside, outside", "front, back" and "left and right" are used herein as reference objects, and it is obvious that the use of the corresponding terms of orientation does not limit the scope of protection of the present invention.
Example 1.
The truss bridge structure with the widened curve provided by the embodiment 1 of the invention comprises a space main truss and a bridge deck system arranged on the space main truss.
As shown in fig. 1, the main spatial truss is composed of a left truss 10 and a right truss 20, the left truss 10 and the right truss 20 have the same structure, and are symmetrically arranged with respect to the center line of the bridge. The left truss 10 and the right truss 20 are made of standard truss width, and the fold lines gradually increase the truss width.
Specifically, the gradual increase of the truss width by the fold line means that along the length direction of the left truss 10 or the right truss 20, two adjacent main truss sections are connected by a node angle folding section between the front section and the rear section, so that the outer end of the rear section is expanded outwards, and the truss width between the left truss 10 and the right truss 20 forming the outer end of the rear section is larger than the truss width at the outer end of the front section.
Taking the left truss 10 as an example, the left truss 10 includes a front section 11, a rear section 12 and a first node angle folding section 13, the front end and the rear end of the first node angle folding section 13 are respectively connected with the front section 11 and the rear section 12, a first truss width L1 of the right truss 20 of the left truss 10 of the front section 11 is a standard truss width, the first node angle folding section 13 and the front section 11 form a first angle folding a1, the first node angle folding section 13 and the rear section 12 form a second angle folding a2, and the second truss width L2 formed by the left truss 10 and the right truss 20 at the outer end of the rear section 12 is larger than the first truss width L1 by adjusting the sizes of the first angle folding a1 and the second angle folding a 2.
According to the fold line widening scheme in the prior art, the front section and the rear section are directly connected into a fold line shape, a connection part forms a fold angle, and the flanges of the bridge deck beam and the vertical rod must form corresponding angles, so that the cross section of the vertical rod is unreasonable, and the difficulty in manufacturing and mounting the bridge deck beam, the vertical rod and the chord rod is high.
In the scheme of the application, the front section 11 and the rear section 12 are connected through the first node corner section 13, the connection between the front section and the rear section in the prior art is changed into the connection through two corners of a first corner A1 and a second corner A2 through one corner, a straight line section is arranged between the first corner A1 and the second corner A2, and the connection node of the diagonal rod, the vertical rod and the chord rod is arranged on the straight line section between the two corners. The upper parallel cross beam and the lower parallel cross beam at the node of each chord of the main truss exist independently of the node. The size of each section of the cross beam of the widened main truss is gradually reduced.
Therefore, a node formed between the front section 11 and the rear section 12 falls on the first node bending angle section 13, and the side edge of the first node bending angle section 13 is a straight line, so that the node is located on a straight line section between the first bending angle A1 and the second bending angle A2, and therefore flanges of the bridge deck beam and the vertical bar are manufactured and processed into a straight line without being processed into corresponding angles like the prior art, the vertical bar is guaranteed to be a normal I-shaped cross section, and the difficulty in manufacturing, installing and matching the bar is reduced.
The chord members, the vertical members and the diagonal members are connected and fixed by splicing plates and high-strength bolts. The splice plates comprise diagonal bar splice plates, vertical bar splice plates, plate rib splice plates, cross beam splice plates and upper flat connection pair stay bar splice plates.
Example 2.
The specific embodiment 1 shows a scheme of widening the broken line only once, however, in practical application, in order to meet the requirement of bridge construction terrain, the broken line is widened for multiple times, so that a larger bridge width is obtained, and the side edge inclination angle is not too large. The specific embodiment 2 shows a scheme of two-stage fold line widening, so as to explain an implementation manner of the scheme of multi-stage fold line widening and a bridge structure.
As shown in fig. 2, a middle section 15 is arranged between the front section 11 and the rear section 12 of the left truss 10 and the right truss 2, and the front section 11, the middle section 15 and the rear section 12 are respectively connected by two node angle sections, namely a first node angle section 13 and a second node angle section 14.
Specifically, the front end and the rear end of the first node angle folding section 13 are respectively connected with the front section 11 and the middle section 15, the front end and the rear end of the second node angle folding section 14 are respectively connected with the middle section 15 and the rear section 12, the first beam width L1 formed by the front section 11 is a standard beam width, the first angle folding formed by the first node angle folding section 13 and the front section 11 is a1, the third angle folding formed by the first node angle folding section 13 and the middle section 15 is A3, the third beam width formed by the outer end of the middle section 15 is L3, and the third beam width L3 is larger than the first beam width L1.
The second node angle section 14 and the middle section 15 form a fourth angle a4, the second angle a2 with the rear section 12, and the second beam width L2 formed by the outer end of the middle section 12 is larger than the third beam width L3.
The above is a two-stage fold line widening scheme, and obviously, according to the scheme, the width of the left truss 10 and the right truss 20 can be widened from the standard truss by N-stage (N is greater than or equal to 1) fold lines, and the truss width is gradually increased by the fold lines so as to meet the requirement of bridge design.
In the scheme of widening the multistage fold lines, any one node break angle section forms two break angles, the same as that of embodiment 1, and the node formed between the adjacent sections falls on the corresponding node break angle section, so that flanges of the bridge surface cross beam and the vertical rod in any node are manufactured and processed into straight lines, the vertical rod is guaranteed to be a normal I-shaped cross section, and the difficulty in manufacturing and installing and matching the rod piece is reduced.
In the schematic diagrams of the embodiments 1 and 2 shown in fig. 1 and 2, in order to clearly show the node angle folding sections and the first, second, third and fourth angles, the corresponding angle folding angles are enlarged, and in practical applications, the corresponding angle folding angles are very small, generally between 2 and 10 degrees, so that the width of each widening of the main girder is not very large, the changed included angle between adjacent sections of the main girder is small, and the distance of each section is long, which does not affect the installation and matching of the members such as the cross beams and the vertical beams between the nodes.
Example 3.
In the solutions shown in the above embodiments 1 and 2, the central line of the bridge is a straight line, and in this embodiment 3, a curved central line of the bridge is constructed by a plurality of corner sections and different corners formed by the plurality of corner sections, so as to form a curved shape that is curved to one side from a standard truss width, and the width of the truss is gradually increased by the corner sections. As shown in FIG. 3, the curved main girders are each shorter in inside chord length than in outside chord length.
In the technical scheme, the space main truss adopts a variable height N-shaped truss type, two trusses, namely a left truss 10 and a right truss 20, are fixedly connected with an upper chord diamond truss type parallel longitudinal connection through a cross beam, and an upper chord and a lower chord adopt box-shaped cross sections and cross sections in a shape like the Chinese character 'wang' of an oblique rod and a vertical rod. The specific structure of the left truss 10 and the right truss 20 is substantially the same as that of the prior art, taking the right truss 20 as an example, as shown in fig. 4, the right truss 20 includes a lower chord 21, a vertical bar 22, an oblique bar 23, and an upper chord 24, the nodes of the left and right trusses are connected by a node beam 25 (see fig. 3), and for improving strength, an internode beam connection (not shown in the figure) may be further provided between the nodes of the left and right trusses. The lower chord and the upper chord are respectively formed by welding a plurality of chords, and the vertical rods, the inclined rods, the node cross beams and the internode cross beams are connected with the upper chord and the lower chord through high-strength bolts.
In the above-described embodiment, the deck system is used for carrying and transmitting loads such as vehicles, pedestrians and the like to the space main girders, and as shown in fig. 5, the deck system is composed of deck beams 31 and orthotropic steel deck plates 32. The steel bridge deck slab gradually increases the bridge width from the transverse standard width in a fold line mode and is matched with the main truss. The bridge deck is divided into 5 large sections according to the connecting mode, the vertical rib plates between each section are connected through high bolts, and the deck plates are connected through welding; tie bar zones (2 zones left and right); a sidewalk overhanging area (2 areas on the left and right); the middle lane area is widened and gradually increased from the standard width.
By combining the above description of the specific embodiment, the curved-line widening truss bridge structure provided by the invention has the following advantages compared with the prior art:
firstly, the bending widening of the space main truss is realized by using straight instead of curved parts, and each node break angle is optimized into two break angle transitions, so that the node is positioned on a straight line section between the two break angles, the condition that the vertical rod is a normal I-shaped section is ensured, and the difficulty in manufacturing and mounting matching of the rod piece is also reduced.
And secondly, the curve linearity of the truss structure is realized through the bending angle, and the widening of the space truss structure is realized through different bending angles of the two main trusses.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, as used herein, 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 present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
Claims (10)
1. A truss bridge structure with a variable curve width comprises a space main truss and a bridge deck system arranged on the space main truss, wherein the space main truss is composed of two trusses which are symmetrically arranged by the central line of a bridge,
the two trusses are wide by standard trusses, and the width of the truss is gradually increased by the broken line, wherein the width of the truss is gradually increased by the broken line, namely the width of the truss is gradually increased along the length direction of the two trusses, the two adjacent main truss sections are connected with each other through the node angle folding sections between the front section and the rear section, so that the outer end of the rear section is outwards expanded, and the truss width between the left truss and the right truss which form the outer end of the rear section is larger than the truss width of the outer end of the front section.
2. The curved widening truss bridge structure according to claim 1, wherein the truss comprises a front section, a rear section and a first node angle folding section, the front end and the rear end of the first node angle folding section are respectively connected with the front section and the rear section, the first truss width of the front section is a standard truss width, the first node angle folding section and the front section form a first angle folding, the first node angle folding section and the rear section form a second angle folding, and the second truss width at the outer end of the rear section is larger than the first truss width.
3. The curved widening truss bridge structure according to claim 2, wherein a plurality of middle sections are arranged between the rear sections of the front sections, and two adjacent sections are connected through node angle sections to form a multi-fold widening structure.
4. The curved widening truss bridge structure as recited in claim 3, wherein a curved bridge center line is constructed by a plurality of corner sections and different corners formed by the plurality of corner sections, forming a standard truss width, the corner sections gradually increasing the truss width, and the center line forming a curve curved to one side.
5. The truss bridge structure with wider curves according to claim 2, wherein the spatial main girders are in a height-variable N-shaped girder type, two girders are connected and fixed with an upper chord diamond-shaped girder type horizontal longitudinal connection through a cross beam, the upper chord and the lower chord of the girders are in a box-shaped section, and the diagonal rods and the vertical rods are in a king-shaped section.
6. The curvilinear widening truss bridge structure as defined in claim 1, wherein the deck system is comprised of deck beams and orthotropic steel deck plates having a width gradually increasing from a transverse standard width in a zigzag manner to fit the spatial main girders.
7. The curved widening truss bridge structure as recited in claim 5, wherein the chords, the vertical rods and the diagonal rods are connected and fixed by splice plates and high-strength bolts.
8. The curved widening truss bridge structure as recited in claim 7, wherein the connecting nodes of the diagonal members, the vertical members and the chord members are located on a straight line segment between the first and second break angles; the upper parallel cross beam and the lower parallel cross beam at the node of each chord of the main truss exist independently of the node.
9. The curvilinear widening truss bridge structure of claim 8 wherein each section of the upper and lower cross-girders is tapered in size.
10. The curved widening truss bridge structure of claim 7 wherein the splice plates comprise diagonal bar splice plates, vertical bar splice plates, plate rib splice plates, beam splice plates, and upper flat coupled pair of strut splice plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210589918.9A CN114837058A (en) | 2022-05-26 | 2022-05-26 | Curve widen truss bridge structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210589918.9A CN114837058A (en) | 2022-05-26 | 2022-05-26 | Curve widen truss bridge structure |
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| CN202210589918.9A Pending CN114837058A (en) | 2022-05-26 | 2022-05-26 | Curve widen truss bridge structure |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10242860B3 (en) * | 2002-09-14 | 2004-01-22 | Dornier Gmbh | Removable bridge |
| RU2380476C1 (en) * | 2008-10-03 | 2010-01-27 | Открытое акционерное общество по проектированию строительства мостов "Институт Гипростроймост" | Metal railroad superstructure with through trusses and movement on ballast |
| CN203411888U (en) * | 2013-07-22 | 2014-01-29 | 中铁工程设计咨询集团有限公司 | Multi-gang and multi-span continuous steel truss bridge |
| CN104328734A (en) * | 2013-07-22 | 2015-02-04 | 中铁工程设计咨询集团有限公司 | Multi-connection and multi-span continuous steel truss girder bridge and construction method thereof |
| CN113279317A (en) * | 2021-05-14 | 2021-08-20 | 中铁大桥勘测设计院集团有限公司 | Curved line widening steel truss arch bridge and design method thereof |
-
2022
- 2022-05-26 CN CN202210589918.9A patent/CN114837058A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10242860B3 (en) * | 2002-09-14 | 2004-01-22 | Dornier Gmbh | Removable bridge |
| RU2380476C1 (en) * | 2008-10-03 | 2010-01-27 | Открытое акционерное общество по проектированию строительства мостов "Институт Гипростроймост" | Metal railroad superstructure with through trusses and movement on ballast |
| CN203411888U (en) * | 2013-07-22 | 2014-01-29 | 中铁工程设计咨询集团有限公司 | Multi-gang and multi-span continuous steel truss bridge |
| CN104328734A (en) * | 2013-07-22 | 2015-02-04 | 中铁工程设计咨询集团有限公司 | Multi-connection and multi-span continuous steel truss girder bridge and construction method thereof |
| CN113279317A (en) * | 2021-05-14 | 2021-08-20 | 中铁大桥勘测设计院集团有限公司 | Curved line widening steel truss arch bridge and design method thereof |
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