CN103882799B - A kind of horizontal support structure of winding up of large span trestle truss - Google Patents
A kind of horizontal support structure of winding up of large span trestle truss Download PDFInfo
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- CN103882799B CN103882799B CN201410109594.XA CN201410109594A CN103882799B CN 103882799 B CN103882799 B CN 103882799B CN 201410109594 A CN201410109594 A CN 201410109594A CN 103882799 B CN103882799 B CN 103882799B
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- 238000004804 winding Methods 0.000 title claims abstract description 28
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 11
- 238000005755 formation reaction Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
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- 238000004364 calculation method Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
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Abstract
The present invention relates to the horizontal support structure of winding up of a kind of large span trestle truss, including three vertical supporting bars and some transverse links, described vertical supporting bar includes king-rod, left bar and right bar, it is characterized in that: connected and composed stiff rectangular carriage by left bar, right bar and two transverse links, being connected in stiff rectangular carriage formed multiple horizontal rectangle frame by all the other transverse links and left bar, right bar, king-rod is connected formation axle assemble supporting with the midpoint of described transverse link; Arranging two diagonal control arms in each horizontal rectangle frame, the upper end of diagonal control arm connects king-rod and is respectively connected left bar, right bar and the junction of transverse link with the junction of transverse link, bottom, forms isosceles triangular structure; Described isosceles triangular structure is uniformly distributed along axle assemble supporting, forms the horizontal support structure of winding up of the large span trestle truss with the distributed isosceles triangle axial support structure of umbrella. Stress joint form of the present invention, under same vertical and horizontal loading, changes the situation of the whole pressurized of horizontal brace that winds up, makes rod member stress more rationalize.
Description
Technical field
The present invention relates to the distributed architecture of a kind of long-span bridge truss stress support bar, be particularly applicable in the arrangement of the trestle horizontal chord member of steel truss stress. Belong to the Structural Engineering field in civil engineering.
Background technology
In recent years, steel truss structure application in bridge, industry and civil buildings is increasingly extensive, it be a kind of by rod member each other at two ends by the structure being articulated and connected, truss member is primarily subjected to axial tension or pressure, it is thus possible to make full use of the intensity of material, material can be saved when span is bigger, alleviate deadweight and increase rigidity.
As shown in Figure 1 to Figure 3, in current design, trestle winds up and is generally decussation brace, because the result of calculation in practice and computation model shows intersection, horizontal support is all pressurized in whole loading process, but general by tension member or suppose that it is not involved in stress and only meets the requirement of slenderness ratio in calculating, this design is irrational. Under existing trestle winds up horizontal support load action, all upper cord members are compression rod, and it is unfavorable no matter steel structural rod piece pressurized is from intensity or detailing requiments.
Summary of the invention
It is an object of the invention to overcome the uneven technical disadvantages of the horizontal support structure pressurized that winds up of above-mentioned trestle truss with not enough, it is provided that the horizontal support structure of winding up of a kind of large span trestle truss.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of horizontal support structure of winding up of large span trestle truss, including three vertical supporting bars and some transverse links, described vertical supporting bar includes king-rod, left bar and right bar, its construction features is in that: connected and composed stiff rectangular carriage by left bar, right bar and two transverse links, being connected in stiff rectangular carriage formed multiple horizontal rectangle frame by all the other transverse links and left bar, right bar, king-rod is connected formation axle assemble supporting with the midpoint of described transverse link;Arranging two diagonal control arms in each horizontal rectangle frame, the upper end of described diagonal control arm connects king-rod and is respectively connected left bar, right bar and the junction of transverse link with the junction of transverse link, bottom, forms isosceles triangular structure; Described isosceles triangular structure is uniformly distributed along axle assemble supporting, forms the horizontal support structure of winding up of the large span trestle truss with the distributed isosceles triangle axial support structure of umbrella.
The purpose of the present invention can also be achieved through the following technical solutions:
The another kind of technical scheme of the present invention is: described king-rod, left bar and right bar can be equidistant plane distribution.
The another kind of technical scheme of the present invention is: the multiple isosceles triangular structures being made up of described diagonal control arm and transverse link, it is possible to be distributed to both sides reverse symmetry centered by the midpoint of king-rod, or the distribution in umbrella in the same direction with king-rod for axis.
The another kind of technical scheme of the present invention is: the base angle of described isosceles triangular structure can be 30 °-60 °.
The another kind of technical scheme of the present invention is: the horizontal support structure of winding up of the large span trestle truss with the distributed isosceles triangle axial support structure of umbrella of described formation can be 15-30 ° of inclination.
The another kind of technical scheme of the present invention is: the horizontal support structure of winding up of the large span trestle truss with umbrella distributed isosceles triangle axial support structure of described formation can domed shape.
The present invention has advantage highlighted below and remarkable result relative to prior art:
1, the present invention is connected and composed stiff rectangular carriage by left bar, right bar and two transverse links, being connected in stiff rectangular carriage formed multiple horizontal rectangle frame by all the other transverse links and left bar, right bar, king-rod is connected formation axle assemble supporting with the midpoint of described transverse link, arranging two diagonal control arms in each horizontal rectangle frame, the upper end of described diagonal control arm connects king-rod and is respectively connected left bar, right bar and the junction of transverse link with the junction of transverse link, bottom, forms isosceles triangular structure, described isosceles triangular structure is uniformly distributed along axle assemble supporting, form the horizontal support structure of winding up of the large span trestle truss with the distributed isosceles triangle axial support structure of umbrella, the king-rod winded up in horizontal support structure of trestle truss, left bar, right bar, cross bar and diagonal control arm form multiple isosceles triangular structure stress, stress joint form is under same vertical and horizontal loading, change the situation of the whole pressurized of horizontal brace that winds up, rod member stress is made more to rationalize, top boom bar cross section can be reduced, there is saving construction cost, reduce cost, the beneficial effects such as good economy performance.
2, the king-rod of the horizontal support structure of winding up of trestle truss of the present invention, left bar, right bar, cross bar and diagonal control arm form multiple isosceles triangle stress, isosceles triangle reverse symmetry is distributed, stress joint form is under same load, part of horizontal supports rod member and is tension layout, and being greatly reduced in former layout rod member pressure, stress and economy to steel structural rod piece are all of great use.
3, the horizontal support structure of winding up of trestle of the present invention, by calculating with the engineering practice in repeatedly Coal Handling Gallery in Thermal Power Plant it can be confirmed that ensure that whole horizontal support tension, and gives full play to the effect of steel construction, is all highly beneficial to total stress.
Accompanying drawing explanation
The trestle truss of Fig. 1 prior art winds up horizontal support structure plan structure schematic diagram.
The trestle truss perspective view of Fig. 2 prior art.
What the trestle truss of Fig. 3 prior art winded up horizontal support structure accepts schematic diagram.
The plan structure schematic diagram of Fig. 4 specific embodiment of the invention 1.
The perspective view of Fig. 5 specific embodiment of the invention 1.
Fig. 6 specific embodiment of the invention 1 accept schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Specific embodiment 1:
With reference to Fig. 4 to Fig. 6, the present embodiment includes three vertical supporting bars and some transverse links 2, described vertical supporting bar includes king-rod 11, left bar 12 and right bar 13, stiff rectangular carriage is connected and composed by left bar 12, right bar 13 and two transverse links 2, being connected in stiff rectangular carriage by all the other transverse links 2 form multiple horizontal rectangle frame with left bar 12, right bar 13, king-rod 11 is connected formation axle assemble supporting with the midpoint of described transverse link; Arranging two diagonal control arms 3 in each horizontal rectangle frame, the upper end of described diagonal control arm 3 connects king-rod 11 and is respectively connected left bar 12, right bar 13 and the junction of transverse link 2 with the junction of transverse link 2, bottom, forms isosceles triangular structure 4; Described isosceles triangular structure 4 is uniformly distributed along axle assemble supporting, forms the horizontal support structure of winding up of the large span trestle truss with the distributed isosceles triangle axial support structure of umbrella.
In an embodiment:
With reference to Fig. 4 and Fig. 5, described king-rod 11, left bar 12 and right bar 13 be equidistant plane distribution, and the multiple isosceles triangular structures 4 being made up of described diagonal control arm 3 and transverse link 2, centered by king-rod 1 midpoint, both sides reverse symmetry is distributed. The cross bar 2 of described isosceles triangular structure 4 and the intersection of diagonal control arm 3 and king-rod 11, left bar 12 and right bar 13 adopt and are welded and fixed, shown in A, B, C, D point in Fig. 5.
In the application, the base angle of described isosceles triangular structure 4 is 30 °-60 °. the horizontal support structure of winding up of the large span trestle truss with umbrella distributed isosceles triangle axial support structure of described formation is 15-30 ° and tilts or domed shape. when interlude stress on truss 5, the horizontal support pressurized that winds up in the middle of truss 5, i.e. vertical pole 1, cross bar 2 and diagonal control arm 3 centre position pressurized, owing to cross bar 2 and the diagonal control arm 3 being connected to left bar 12 and right bar 13 constitute several isosceles triangular structure 4 fixed structures, and isosceles triangular structure 4 is with king-rod 1 central point (being also the center of truss) for initial point to both sides reversed arrangement, therefore, after pressurized, pressure is along winding up horizontal support two ends progressively to reduction, a kind of pulling force is formed as at truss 5 two end portions diagonal control arm 3, thus, can significantly reduce compression member pressure.
The present invention is in lifting certain tresstle work example, wherein one section of 24m is across truss, wide 7.5m, high 3.5m, gradient 15 °, when complete input external loads, the wind up internal force of horizontal support bar technical pattern of horizontal support technical pattern of being winded up by truss of the present invention respectively and former side's truss contrasts. As shown in Figure 3 and Figure 6, through SAP2000 computational analysis, draw, under same vertical and wind load combination effect, the following list of internal force result of winding up: table 1: wind up horizontal support bar internal force (negative value is pressure, on the occasion of for drawing) for prior art truss
Unit: thousand Ns
Table 2: wind up horizontal support bar internal force (negative value for pressure, on the occasion of for drawing) for the technology of the present invention truss
Unit: thousand Ns
Can be seen that from upper embodiment comparison and detection, trestle truss of the present invention horizontal support structure technology truss supporting construction mode of winding up of winding up can make part rod member tension, and significantly reduces compression member pressure.
Specific embodiment 2:
The feature of the specific embodiment of the invention 2 is: the domed shape of horizontal support structure of winding up of the large span trestle truss with umbrella distributed isosceles triangle axial support structure of described formation. All the other are with specific embodiment 1.
Other specific embodiments:
The feature of other specific embodiments of the present invention is: the multiple isosceles triangular structures being made up of diagonal control arm 3 and transverse link 2, the distribution in umbrella in the same direction with king-rod 11 for axis. All the other are with specific embodiment 1 or specific embodiment 2.
Claims (6)
1. the horizontal support structure of winding up of a large span trestle truss, including three vertical supporting bars and some transverse links (2), described vertical supporting bar includes king-rod (11), left bar (12) and right bar (13), it is characterized in that: connected and composed stiff rectangular carriage by left bar (12), right bar (13) and two transverse links (2), being connected in stiff rectangular carriage by all the other transverse links (2) and left bar (12), right bar (13) and form multiple horizontal rectangle frame, king-rod (11) is connected formation axle assemble supporting with the midpoint of described transverse link; Each horizontal rectangle frame arranges two diagonal control arms (3), the upper end of described diagonal control arm (3) connects king-rod (11) and is respectively connected left bar (12), right bar (13) and the junction of transverse link (2) with the junction of transverse link (2), bottom, forms isosceles triangular structure (4); Described isosceles triangular structure (4) is uniformly distributed along axle assemble supporting, forms the horizontal support structure of winding up of the large span trestle truss with the distributed isosceles triangle axial support structure of umbrella.
2. the novel horizontal support structure of winding up of a kind of large span trestle truss according to claim 1, it is characterised in that: described king-rod (11), left bar (12) and right bar (13) they are equidistant plane distribution.
3. the novel horizontal support structure of winding up of a kind of large span trestle truss according to claim 1 and 2, it is characterized in that: the multiple isosceles triangular structures (4) being made up of described diagonal control arm (3) and transverse link (2), it is distributed to both sides reverse symmetry centered by king-rod (11) midpoint, or the distribution in umbrella in the same direction with king-rod (11) for axis.
4. the novel horizontal support structure of winding up of a kind of large span trestle truss according to claim 1, is characterized in that: the base angle of described isosceles triangular structure (4) is 30 °-60 °.
5. the novel horizontal support structure of winding up of a kind of large span trestle truss according to claim 1, is characterized in that: the horizontal support structure of winding up of the large span trestle truss with the distributed isosceles triangle axial support structure of umbrella of described formation is 15-30 ° of inclination.
6. the novel horizontal support structure of winding up of a kind of large span trestle truss according to claim 1, is characterized in that: the domed shape of horizontal support structure of winding up of the large span trestle truss with umbrella distributed isosceles triangle axial support structure of described formation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410109594.XA CN103882799B (en) | 2014-03-21 | 2014-03-21 | A kind of horizontal support structure of winding up of large span trestle truss |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410109594.XA CN103882799B (en) | 2014-03-21 | 2014-03-21 | A kind of horizontal support structure of winding up of large span trestle truss |
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| CN103882799A CN103882799A (en) | 2014-06-25 |
| CN103882799B true CN103882799B (en) | 2016-06-15 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201400966Y (en) * | 2009-03-25 | 2010-02-10 | 中国建筑北京设计研究院有限公司 | Overlength cantilever large truss type rainshed |
| JP2010138617A (en) * | 2008-12-12 | 2010-06-24 | Maeda Corp | Installation method for timbering for bridge |
| CN103274309A (en) * | 2013-06-26 | 2013-09-04 | 中铁八局集团第一工程有限公司 | Cantilever truss crane for tunnel construction |
| CN203782538U (en) * | 2014-03-21 | 2014-08-20 | 中国能源建设集团广东省电力设计研究院 | Upper chord horizontal supporting structure for long-span trestle truss |
-
2014
- 2014-03-21 CN CN201410109594.XA patent/CN103882799B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010138617A (en) * | 2008-12-12 | 2010-06-24 | Maeda Corp | Installation method for timbering for bridge |
| CN201400966Y (en) * | 2009-03-25 | 2010-02-10 | 中国建筑北京设计研究院有限公司 | Overlength cantilever large truss type rainshed |
| CN103274309A (en) * | 2013-06-26 | 2013-09-04 | 中铁八局集团第一工程有限公司 | Cantilever truss crane for tunnel construction |
| CN203782538U (en) * | 2014-03-21 | 2014-08-20 | 中国能源建设集团广东省电力设计研究院 | Upper chord horizontal supporting structure for long-span trestle truss |
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| CN103882799A (en) | 2014-06-25 |
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Address after: 510670 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Applicant after: Company limited of China Energy Engineering Group Guangdong Electric Power Design Institute Address before: 510670 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Applicant before: Guangdong Electric Power Design Institute of CEEC |
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Free format text: CORRECT: APPLICANT; FROM: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC POWER DESIGN INSTITUTE TO: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC POWER DESIGN INSTITUTE CO., LTD. |
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