CN104060740A - Double-layer column surface net shell with lower chord being prestressed stay rope - Google Patents
Double-layer column surface net shell with lower chord being prestressed stay rope Download PDFInfo
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- CN104060740A CN104060740A CN201410257652.3A CN201410257652A CN104060740A CN 104060740 A CN104060740 A CN 104060740A CN 201410257652 A CN201410257652 A CN 201410257652A CN 104060740 A CN104060740 A CN 104060740A
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Abstract
The invention discloses a double-layer column surface net shell with a lower chord being a prestressed stay rope. The double-layer column surface net shell comprises a double-layer column surface net shell body and inclined towing ropes, wherein the double-layer column surface net shell body consists of upper chord rods, web rods, lower chord rods, lower chord ropes, upper-chord bolt ball nodes and lower-chord bolt ball nodes; the upper chord rods and the web rods are connected by the upper-chord bolt ball nodes and the lower-chord bolt ball nodes to form a regular quadrangular pyramid; the lower chord rods are arranged along the long-span direction of the double-layer column surface net shell body; the lower chord ropes are arranged along the short-span direction of the double-layer column surface net shell body; the double-layer column surface net shell body is supported by adopting the peripheries of the lower chords; the inclined towing ropes are symmetrically arranged in the double-layer column surface net shell body; the lower ends of the inclined towing ropes are anchored on downward-bearing type support nodes in the short-span direction of the double-layer column surface net shell body; the upper ends of the inclined towing ropes are connected with upper-chord fixing nodes. The double-layer column surface net shell disclosed by the invention has the characteristics that the prestressed effect is obvious, the indoor redundancy space in a building is not increased, the used steel amount is low, and the adaptability to air-suctioning load can be achieved.
Description
Technical field
The invention belongs to the pre stressed lauice shell structure of Long Span Roof Structures technical field, the double-layer cylindrical latticed shell that particularly a kind of lower edge is prestressed cable.
Background technology
Pre stressed lauice shell structure is a kind of new space structures, and it introduces spatial steel structure by prestressing technique, has expanded the range of application of prestressing technique.Prestressing force and space structures can be considered new technology and the new system of architecture industry, thereby the Prestressed Space latticed shell structure of the two combination has just represented the last word in civil works.Drag-line pre stressed lauice shell structure is in common net shell structure, to configure according to actual needs high-strength prestressed rope, a kind of structural system forming at local or whole introducing prestressing force by stretch-draw prestressing force rope.Its basic thought is after having applied prestressing force, makes structure generation reversible deformation, to reduce internal force peak value; Under load action, the horizontal thrust of Arch Reticulated Shell is born by lower edge flexible cable, forms self equilibrium systems, to alleviate the horizontal thrust that Arch Reticulated Shell produces bearing the horizontal movement that reduces sliding support.Introduce this control of prestressing force and adjust and improve structure stress situation, occur the reinforcement bar that subtracts power bar and minimum of peak discharge, reach saving material, improve the integral rigidity of structure, reduce the object of structure height and saving construction costs.
At present, it is external that prestressed cable is arranged in latticed shell structure more, need to take up room in addition, and this will increase pre stressed lauice shell structure height, for guaranteeing interior net storey height, must increase height of house, strengthens latticed shell structure expense in addition; Need the additional support rod member set up and node often to a kind of sense of depression of people, building use, decorative effect and economic benefit are all poor simultaneously.
In addition, the internal force that applies each lower edge rod member under the net shell outer load effect after prestressing force is different, and now general drag-line pre stressed lauice shell structure only applies identical prestressing force at last quarter rope or part last quarter rope, this will make strength of structural materials not be not fully exerted, steel using amount increases, and causes the waste of material.
Moreover, drag-line pre stressed lauice shell structure is a kind of wind load sensitive structure, for modern long span building, the general drag-line pre stressed lauice shell structure that adopts light Roof system, in wind load larger area or typhoon region, the situation that may occur the lax or pressurized of lower edge drag-line and deactivate under wind suction effect, its self equilibrium systems does not also exist, degree of safety is lost, so often need to heavily guarantee under wind suction effect structure not loss of stability and degree of safety roofing is standby, therefore existing drag-line pre stressed lauice shell structure is not suitable for the effect of wind suction.
Summary of the invention
The problem existing for above-mentioned prior art, the present invention proposes the double-layer cylindrical latticed shell that a kind of lower edge is prestressed cable, double-layer cylindrical latticed shell is replaced with strand spiral rope along the short lower edge across direction rod member used, on every section of last quarter rope, apply different prestressing force, and in net housing, be provided with for resisting the oblique guy rope of wind suction, thereby form a kind of Novel bracing cable prestressing force double-layer latticed shell structure.
For achieving the above object, the present invention has adopted following technical scheme: it is the double-layer cylindrical latticed shell of prestressed cable that a kind of lower edge is provided, comprise double-layer cylindrical latticed shell (1) and hauling-rope type supporting mechanism, described double-layer cylindrical latticed shell (1) comprises upper chord (3), web member (4), lower chord (5), last quarter rope (6), bolted spherical node (7) and lower edge bolted spherical node (8) wind up, described upper chord (3) is arranged on the top of described double-layer cylindrical latticed shell (1), and across direction and long span direction, become checkerboard type arranged crosswise along double-layer cylindrical latticed shell (1) is short, the described bolted spherical node that winds up (7) is arranged on the crossover node being formed by upper chord (3), described lower chord (5) is arranged on the bottom of described double-layer cylindrical latticed shell (1), and arranges along double-layer cylindrical latticed shell (1) long span direction, described last quarter rope (6) is arranged on the bottom of described double-layer cylindrical latticed shell (1), and arranges across direction along double-layer cylindrical latticed shell (1) is short, described lower chord (5) forms checkerboard type arranged crosswise with last quarter rope (6), and described lower edge bolted spherical node (8) is arranged on the crossover node being formed by lower chord (5) and last quarter rope (6), described web member (4) is arranged between described upper chord (3) and lower chord (5), described in its two ends are connected to respectively, wind up bolted spherical node (7) and lower edge bolted spherical node (8), and the bolted spherical node (7) that winds up described in each is connected to form positive quadrangular pyramid with adjacent four described lower edge bolted spherical nodes (8), described double-layer cylindrical latticed shell (1) adopts lower edge periphery supporting,
Hauling-rope type supporting mechanism comprises the stationary nodes of winding up (10), oblique guy rope (2) and lower support type support node (9), the described stationary nodes of winding up (10) is arranged on the described bolted spherical node that winds up (7), described lower support type support node (9) is separately positioned on the below at the short two ends across direction of described double-layer cylindrical latticed shell (1), the stationary nodes (10) of winding up described in described oblique guy rope (2) two ends are connected to respectively and lower support type support node (9), described lower support type support node (9) is connected to form isosceles triangle with the stationary nodes (10) of winding up described in two.
Further, described last quarter rope (6) is arranged between short adjacent two the lower edge bolted spherical nodes (8) across direction of described double-layer cylindrical latticed shell (1).
Further, be welded with and connect otic placode (11) on the both sides of described lower edge bolted spherical node (8), described last quarter rope (6) is connected to respectively on the connection otic placode (11) on two the lower edge spiral ball nodes (8) that are adjacent.
Further, described last quarter rope (6) is provided with the adjusting sleeve pipe (12) for regulating guy cable length.
Further, the spacing between adjacent described lower support type support node (9) is 1～3 grid.
Further, the described stationary nodes of winding up (10) is distributed in the inner side of described lower support type support node (9), and its double-layer cylindrical latticed shell (1) for the described lower support type support node (9) 1/5th to 1/3rd of distance is short in any one bolted spherical node that winds up (7) in span scope.
Beneficial effect of the present invention:
1. last quarter rope of the present invention and oblique guy rope are arranged in steel screen body surface and body, do not increase Indoor environment redundant space.
2. in the present invention, every section of last quarter rope is applied to different prestressing force, strength of structural materials is not fully exerted, steel using amount reduces.
3. the present invention has configured oblique guy rope, tiltedly the Main Function of guy rope is exactly under the effect of wind suction, to prevent the allowance for camber that structure generation is excessive, thereby guarantee that lower edge drag-line is not lax, when another formal structure bears conventional vertical live load, tiltedly guy rope also can provide elastomeric bearing for steel screen, its working mechanism is as follows: last quarter rope is forming a pre-stress system with two-way drag with oblique guy rope after pre-stretch-draw, structure is under the vertical live load effect of routine, the internal force of most of last quarter rope increases, last quarter rope increases the radial constraint power of its corresponding grid, the lower flexure strain of restriction net shell, tiltedly the internal force of guy rope reduces, in other words the internal force increment of oblique guy rope points to the upper end of oblique guy rope, this internal force increment is for resisting live load straight down, tiltedly guy rope equals to provide resiliency supported to steel screen, under wind suction effect, most of last quarter rope internal force reduces, original part last quarter rope reduces the radial constraint power of its corresponding grid, be that last quarter rope reduces the upper arching action of its corresponding grid, tiltedly the internal force of guy rope increases, the reversal deformation of structure is had to good restraining function.
Therefore, the present invention compared with prior art, have advantages of do not increase Indoor environment redundant space, rolled steel dosage low, cheap, can adapt to wind and inhale load.
Accompanying drawing explanation
Fig. 1 is the plane structure schematic diagram of a kind of lower edge of the present invention double-layer cylindrical latticed shell that is prestressed cable;
Fig. 2 is the A-A sectional view of accompanying drawing 1;
Fig. 3 is lower edge bolted spherical node structural representation;
Fig. 4 is last quarter rope structural representation.
In figure, 1-double-layer cylindrical latticed shell; The oblique guy rope of 2-; 3-upper chord; 4-web member; 5-lower chord; 6-last quarter rope; The 7-bolted spherical node that winds up; 8-lower edge bolted spherical node; 9-lower support type support node; The 10-stationary nodes of winding up; 11-connects otic placode; 12-adjusting sleeve pipe.
The specific embodiment
For making object and the technical scheme of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing of the embodiment of the present invention, the technical scheme of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiment.Based on described embodiments of the invention, the every other embodiment that those of ordinary skills obtain under the prerequisite without creative work, belongs to the scope of protection of the invention.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have with the present invention under the identical meaning of the general understanding of those of ordinary skill in field.Should also be understood that such as those terms that define in general dictionary and should be understood to have the consistent meaning of meaning in the context with prior art, unless and definition as here, can not explain by idealized or too formal implication.
The implication of the "and/or" described in the present invention refers to separately individualism or both simultaneous situations include interior.
The implication of " inside and outside " described in the present invention refers to respect to equipment itself, in the direction of sensing equipment inside is, otherwise outside being, but not specific restriction to equipment mechanism of the present invention.
When the implication of " left and right " described in the present invention refers to reader over against accompanying drawing, reader's the left side is a left side, and the right of reader is the right side, but not specific restriction to equipment mechanism of the present invention.
The implication of " connection " described in the present invention can be that the direct connection between parts can be also by the indirect connection of other parts between parts.
As shown in Figures 1 and 2, the double-layer cylindrical latticed shell that a kind of lower edge of the present invention is prestressed cable comprises double-layer cylindrical latticed shell 1 and oblique guy rope 2; Double-layer cylindrical latticed shell 1 consists of upper chord 3, web member 4, lower chord 5, last quarter rope 6, the bolted spherical node 7 that winds up, lower edge bolted spherical node 8, upper chord 3, web member 4 are connected to form positive quadrangular pyramid by wind up bolted spherical node 7 and lower edge bolted spherical node 8, lower chord 5 is arranged along double-layer cylindrical latticed shell 1 long span direction, last quarter rope 6 is arranged across direction along double-layer cylindrical latticed shell 1 is short, double-layer cylindrical latticed shell 1 adopts lower edge periphery supporting, and double-layer cylindrical latticed shell 1 is short is 1～3 grid across the spacing between the lower support type support node 9 of direction; Tiltedly guy rope 2 is arranged symmetrically with in double-layer cylindrical latticed shell 1 body, tiltedly the lower end of guy rope 2 is anchored on the short lower support type support node 9 across direction of double-layer cylindrical latticed shell 1, tiltedly the upper end of guy rope 2 is connected with the stationary nodes 10 of winding up, the stationary nodes of winding up 10 is distributed in the both sides of the short lower support type support node 9 across direction of double-layer cylindrical latticed shell 1, and the single stationary nodes 10 of winding up can be short in any one bolted spherical node 7 that winds up in span scope for the double-layer cylindrical latticed shell 1 apart from lower support type support node 1/9th five to 1/3rd.
As shown in Figures 2 and 3, last quarter rope 6 arranges between across every two lower edge bolted spherical nodes 8 of direction double-layer cylindrical latticed shell 1 is short, on lower edge bolted spherical node 8, be welded with and connect otic placode 11, on the lower edge spiral ball node 8 at each section of last quarter rope 6 and its two ends, be connected otic placode 11 connections.
As shown in Figure 4, be provided with adjusting sleeve pipe 12 in last quarter rope 6, last quarter rope 6 stretch-draw can regulate the length of last quarter rope 6 by adjusting adjusting sleeve pipe 12, reach the effect of tensioning last quarter rope 6.
The basic functional principle of the double-layer cylindrical latticed shell that a kind of lower edge of the present invention is prestressed cable is as follows: to last quarter rope 6 and tiltedly guy rope 2 with structure under " prestressing force+dead load+(live load ﹣ wind is inhaled load)/2 " acting in conjunction, structure vertical deformation approaches zero and applies prestressing force for criterion, make structure produce appropriate allowance for camber under " prestressing force+dead load " acting in conjunction, the benefit of this criterion is to make total displacement that under the downward total displacement of structure under " prestressing force+dead load+live load " acting in conjunction and " prestressing force+dead load+wind is inhaled load " acting in conjunction, structure makes progress about equally, thereby realize the object that distributing rationally of resource reaches saving steel, under " prestressing force+dead load " state, last quarter rope 6 forms a pre-stress system that two-way drag can be provided with oblique guy rope 2, structure is under the vertical live load effect of routine, the internal force of most of last quarter rope increases, last quarter rope increases the radial constraint power of its corresponding grid, the lower flexure strain of restriction net shell, tiltedly the internal force of guy rope reduces, in other words the internal force increment of oblique guy rope points to the upper end of oblique guy rope, this internal force increment is for resisting live load straight down, tiltedly guy rope equals to provide resiliency supported to steel screen, under wind suction effect, most of last quarter rope internal force reduces, original part last quarter rope reduces the radial constraint power of its corresponding grid, be that last quarter rope reduces the upper arching action of its corresponding grid, tiltedly the internal force of guy rope increases, the reversal deformation of structure is had to good restraining function.
These are only embodiments of the present invention, it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (6)
1. the double-layer cylindrical latticed shell that lower edge is prestressed cable, comprises double-layer cylindrical latticed shell (1) and hauling-rope type supporting mechanism, it is characterized in that,
Described double-layer cylindrical latticed shell (1) comprises upper chord (3), web member (4), lower chord (5), last quarter rope (6), the bolted spherical node that winds up (7) and lower edge bolted spherical node (8), described upper chord (3) is arranged on the top of described double-layer cylindrical latticed shell (1), and along double-layer cylindrical latticed shell (1) is short, across direction and long span direction, become checkerboard type arranged crosswise, described in the bolted spherical node (7) that winds up be arranged on the crossover node being formed by upper chord (3); Described lower chord (5) is arranged on the bottom of described double-layer cylindrical latticed shell (1), and arranges along double-layer cylindrical latticed shell (1) long span direction; Described last quarter rope (6) is arranged on the bottom of described double-layer cylindrical latticed shell (1), and arranges across direction along double-layer cylindrical latticed shell (1) is short; Described lower chord (5) forms checkerboard type arranged crosswise with last quarter rope (6), and described lower edge bolted spherical node (8) is arranged on the crossover node being formed by lower chord (5) and last quarter rope (6); Described web member (4) is arranged between described upper chord (3) and lower chord (5), described in its two ends are connected to respectively, wind up bolted spherical node (7) and lower edge bolted spherical node (8), and the bolted spherical node (7) that winds up described in each is connected to form positive quadrangular pyramid with adjacent four described lower edge bolted spherical nodes (8); Described double-layer cylindrical latticed shell (1) adopts lower edge periphery supporting;
Hauling-rope type supporting mechanism comprises the stationary nodes of winding up (10), oblique guy rope (2) and lower support type support node (9), described in being arranged in, the described stationary nodes of winding up (10) winds up on bolted spherical node (7), described lower support type support node (9) is separately positioned on the below at the short two ends across direction of described double-layer cylindrical latticed shell (1), the stationary nodes (10) of winding up described in described oblique guy rope (2) two ends are connected to respectively and lower support type support node (9), described lower support type support node (9) is connected to form isosceles triangle with the stationary nodes (10) of winding up described in two.
2. the double-layer cylindrical latticed shell that a kind of lower edge is prestressed cable according to claim 1, is characterized in that, described last quarter rope (6) is arranged between short adjacent two the lower edge bolted spherical nodes (8) across direction of described double-layer cylindrical latticed shell (1).
3. the double-layer cylindrical latticed shell that a kind of lower edge is prestressed cable according to claim 2, it is characterized in that, on the both sides of described lower edge bolted spherical node (8), be welded with and connect otic placode (11), described last quarter rope (6) is connected to respectively on the connection otic placode (11) on two the lower edge spiral ball nodes (8) that are adjacent.
4. the double-layer cylindrical latticed shell that a kind of lower edge is prestressed cable according to claim 3, is characterized in that, described last quarter rope (6) is provided with the adjusting sleeve pipe (12) for regulating guy cable length.
5. the double-layer cylindrical latticed shell that a kind of lower edge is prestressed cable according to claim 1, is characterized in that, the spacing between adjacent described lower support type support node (9) is 1～3 grid.
6. according to double-layer cylindrical latticed shell that described in claim 4 or 5, a kind of lower edge is prestressed cable, it is characterized in that, the described stationary nodes of winding up (10) is distributed in the inner side of described lower support type support node (9), and its double-layer cylindrical latticed shell (1) for the described lower support type support node (9) 1/5th to 1/3rd of distance is short in any one bolted spherical node that winds up (7) in span scope.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410257652.3A CN104060740A (en) | 2014-06-11 | 2014-06-11 | Double-layer column surface net shell with lower chord being prestressed stay rope |
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| CN201410257652.3A CN104060740A (en) | 2014-06-11 | 2014-06-11 | Double-layer column surface net shell with lower chord being prestressed stay rope |
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Cited By (4)
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| CN106088706A (en) * | 2016-06-21 | 2016-11-09 | 武汉大学 | A kind of checkerboard type quadrangular pyramid lattice steel constructions cooling tower |
| CN106202798A (en) * | 2016-07-22 | 2016-12-07 | 铁道第三勘察设计院集团有限公司 | A kind of constructive method of bionical spiral net shell |
| CN106284664A (en) * | 2016-10-21 | 2017-01-04 | 中冶华天工程技术有限公司 | A kind of cylindrical reticulated shell roofing being prone to maintenance and repair method thereof |
| CN114526904A (en) * | 2022-04-24 | 2022-05-24 | 华北科技学院 | Cable force test device of space cable structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106202798B (en) * | 2016-07-22 | 2019-03-19 | 中国铁路设计集团有限公司 | A kind of constructive method of bionical spiral reticulated shell |
| CN106284664A (en) * | 2016-10-21 | 2017-01-04 | 中冶华天工程技术有限公司 | A kind of cylindrical reticulated shell roofing being prone to maintenance and repair method thereof |
| CN114526904A (en) * | 2022-04-24 | 2022-05-24 | 华北科技学院 | Cable force test device of space cable structure |
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Application publication date: 20140924 |