CN102251616B - Secondary cable net cable dome structure - Google Patents
Secondary cable net cable dome structure Download PDFInfo
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- CN102251616B CN102251616B CN2011101125937A CN201110112593A CN102251616B CN 102251616 B CN102251616 B CN 102251616B CN 2011101125937 A CN2011101125937 A CN 2011101125937A CN 201110112593 A CN201110112593 A CN 201110112593A CN 102251616 B CN102251616 B CN 102251616B
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Abstract
The invention discloses a secondary cable net cable dome structure, which consists of a ridge cable, a broken line stay cable, an upper ring cable, a lower ring cable, an annular middle pressure lever, a radial middle pressure lever, a corner pressure lever and a secondary cable net. The secondary cable net cable dome structure can support a rigid roof, is a novel full-tension structure similar to a cable dome, and belongs to the field of spatial structures of civil engineering buildings. The secondary cable net is formed by orthogonal radial secondary cable and annular secondary cable planes, big grids of the upper part of a main structure consisting of the ridge cable and the upper ring cable are divided into small grids, and nodes of the secondary cable net are directly used as fulcrums of the rigid roof. The secondary cable net is supported on the surrounding ridge cable and the upper ring cable, and the supporting rigidity of the ridge cable and the upper ring cable is reinforced through the annular middle pressure lever and the radial middle pressure lever. Through the secondary cable net cable dome structure, the design idea of the full-tension structure is kept, the advantages of a cable dome structure are succeeded, the integral stability is better, and the selective range of the roof material is wider; and the structure can be popularized and applied.
Description
Technical field
The invention discloses a kind of novel full tension structure---inferior rope net cable dome structure; This structure is made up of depression bar, radially middle depression bar, angle depression bar and inferior rope net in notochord, broken line oblique cord, last strop, following strop, the hoop; Can lay the rigid roofing material on it, like face glass and color steel.Belong to structure field, space in the civil engineering work.
Background technology
Conventional rope dome is a kind of full tension structure in space that is made up of notochord, oblique cord, strop and depression bar, and its configuration is succinct, the space spans ability is strong, from heavy and light, free height, applies at home at present.Because the requirement of building and structure, size of mesh opening is bigger between the rope dome member, and this just requires Roof system self to have good leap performance, therefore mainly adopts the roofing materials of stretch-draw film as the rope dome abroad.
The stretch-draw film is a flexible material, has thin thickness, from heavy and light, part printing opacity, negative gauss curved surface, flexible characteristic such as big, but heat-insulating property and anti-environment pollution ability are relatively poor, and price is more expensive.Therefore, adopt the rope dome of stretch-draw face to be difficult to be suitable in the environment pollution area at home, and single roofing materials also is one of factor of applying at home of restraint dome.
Conventional rigid such as face glass, color steel roofing materials, existing application very widely in the steel roof structure at home.But the span ability of rigid roofing is little, need set up aggregated(particle) structure supporting roofing, and with roofing Load Transfer to rope dome agent structure, this span ability to aggregated(particle) structure has proposed higher requirement.
Summary of the invention
Technical problem:The purpose of this invention is to provide rope net cable dome structure a kind of time, inferior rope net cable dome structure had both kept the design philosophy of full tension structure; Also inherited the advantage of cable dome structure; Resistance to overturning is better, and the selectable range of roofing materials is wider, helps applying of this class formation.
Technical scheme:If the aggregated(particle) structure of supporting rigidity roofing adopts purlin, then formed an individual layer purlin net shell that covers on the rope dome, heavy relatively purlin net shell had both weakened the advantage of rope dome, did not also meet the design philosophy of full tension structure.The rope net is slim and graceful, and span ability is bigger, and the stretch-draw face has better rigidity relatively; By covering the rigid roofing material that far overweights face on it; Therefore the bigger Suo Li of needs, and rope network edge not only connects the depression bar top, also is connected on the rope section of notochord and last strop; Because of the tension force of this rope net can produce bigger concentrated force on the rope section of notochord and last strop, this is unfavorable for the stressed of notochord and last strop.Therefore, inherit the advantage of conventional rope dome, and adapt to rigid roofing, need a kind of rope dome that is similar to, by the novel full tension structure of inferior rope net supporting rigidity roofing.
But the object of the invention time rope net cable dome structure is a kind of novel full tension structure of supporting rigidity roofing, can lay the rigid roofing material on it, like face glass, color steel.
1) configuration of inferior rope net cable dome structure
This structure comprise notochord, broken line oblique cord, angle depression bar, down strop, radially in depression bar, the inferior rope net going up depression bar in strop, the hoop and constitute by the radially time rope and the hoop time rope of plane; Inferior rope network arrangements is in the main structure top macrolattice that is surrounded by notochord and last strop; And link with notochord and last strop, inferior rope net node is directly as the fulcrum of rigid roofing.
Depression bar is arranged between strop and the following strop in the hoop, and for last strop provides elastic support, the vertical rigidity of strop in the raising reduces the upward Suo Li of strop.
Radially middle depression bar is arranged between notochord and the broken line oblique cord, for notochord provides elastic support, improves the vertical rigidity of notochord.
The broken line oblique cord is a broken line shape, with radially in the junction of depression bar have break, the initial precompression and the dynamic balance relation of the horizontal sextant angle fibrous root of each broken line depression bar according to the angle depression bar with are radially confirmed, thus the length of depression bar in confirming radially.
Beneficial effect:On the basis of conventional rope dome, depression bar reaches time rope net in strop, radially middle depression bar, the hoop through setting up, but forms the inferior rope net cable dome structure of supporting rigidity roofing.The grid node of inferior rope net provides fulcrum for the rigid roofing material, and size of mesh opening is even with initial prestressing force, is convenient to the laying of rigid roofing material; Set up radially in depression bar, make local configuration similar portions cable truss, strengthened the vertical rigidity of notochord greatly, thereby for hoop time rope provides strong support, otherwise that hoop time rope is being kept outside the plane of depression bar radially is stable; The last strop of setting up; For radially inferior rope provides fulcrum, and depression bar in the hoop of setting up, then utilizing the following strop that has than hawser power is that last strop provides elastic support; Thereby improve the vertical rigidity of going up strop greatly; Reduce to go up the Suo Li of strop, in addition, radially time rope is being kept outside the plane of depression bar in the hoop stable.Inferior rope net cable dome structure had both kept the design philosophy of full tension structure, had also inherited the advantage of cable dome structure, and resistance to overturning is better, and the selectable range of roofing materials is wider, helps applying of this class formation.
Description of drawings
Fig. 1 is the graphics of time rope net cable dome structure;
Fig. 2 is the graphics of main structure;
Fig. 3 is the sectional drawing of main structure;
Fig. 4 is the plan view of time rope net;
Have among the figure: notochord 1, oblique cord 2, angle depression bar 3, following strop 4, radially middle depression bar 5, last strop 6, depression bar 7 in the hoop, radially inferior rope 8, hoop time rope 9.
The specific embodiment
The inferior rope net cable dome structure of design supporting rigidity roofing, basic step is following:
1) at first selected rigid roofing material is tentatively confirmed plane time rope grid basic size according to its span ability, the spacing of promptly radially inferior rope and hoop time rope.
2) based on the permission deformation values of rigid roofing material with time rope net, the preliminary span and initial prestressing force of confirming radially inferior rope and hoop time rope.
3) according to the span of radially inferior rope and hoop time rope, tentatively confirm main structure grid basic size, the i.e. span of notochord and strop in the main structure.
4) require based on the span of notochord and strop and the span requirement of integral roof structure, tentatively confirm the number of rings of agent structure and width of cloth number radially.
5), confirm the notochord gradient of each ring and the length of angle depression bar according to architectural image and function and structural performance requirement.
6) based on the fixed how much position shapes of above step and roofing weight and the radially inferior initial prestressing force of rope, preliminary position of confirming to go up depression bar in initial prestressing force of strop and the hoop.
7), calculate the initial prestressing force of notochord and angle depression bar by the ring recursion from interior circle based on the dynamic balance relation; Based on the initial prestressing force of notochord and roofing weight and the hoop time initial prestressing force of rope, preliminary definite radially position of middle depression bar, and calculate its initial precompression; Initial precompression and the dynamic balance relation of depression bar based on the angle depression bar and radially; Confirm the horizontal sextant angle of each broken line of oblique cord; Thereby the initial prestressing force of the length of depression bar and oblique cord and following strop in confirming radially is tentatively definite with initial prestressing force to the initial bit shape of this rope net cable dome structure.
8) according to the initial prestressing force of drag-line and depression bar, the material of initial option member and specification.
9) carry out the checking computations of ultimate limit state and serviceability limit state, the initial bit shape of inferior rope net cable dome structure and the material and the specification of initial prestressing force and member are optimized adjustment.
Different with conventional rope dome; The configuration of inferior rope rete cord dome has following characteristics: (1) oblique cord is a broken line shape; Depression bar between notochord and oblique cord, having set up radially, this part configuration similar portions cable truss has strengthened the vertical rigidity of notochord greatly; Thereby for hoop time rope provides strong support, otherwise that hoop time rope is being kept outside the plane of depression bar radially is stable.
(2) each broken line of broken line shape oblique cord and the angle of horizontal plane should be confirmed according to the initial precompression and the dynamic balance relation of depression bar in radially and angle depression bar, thus under the fixed condition in notochord and depression bar locus, angle definite radially in the length of depression bar.
(3) above following strop, set up strop, for radially inferior rope provides fulcrum, and set up depression bar in the hoop at the middle part of upper and lower strop, this not only improves the vertical rigidity of going up strop greatly, and reduces to go up the initial pretension of strop greatly.Generally speaking, the Suo Li of strop is maximum down in same ring drag-line, far above last strop.Most of vertical load that last strop bears is passed to down strop through the hoop depression bar, can't cause the excessive deformation of strop down.Therefore, set up depression bar in the hoop, being actually and utilizing the following strop that has than hawser power is that last strop provides elastic support.In addition, radially time rope is being kept outside the plane of depression bar in the hoop stable.
(4) in the macrolattice of main structure, inferior rope net is a plane rope net, and radially time rope is perpendicular to last strop, and this helps the even of time initial pretension of rope.
(5) inferior rope size of mesh opening comprehensively the factors such as Suo Li and notochord cord clip antiskid bearing capacity of span and weight, the inferior rope net of rigid roofing material confirm that and should divide equally notochord and last strop, this helps the uniformity of time rope size of mesh opening as far as possible.
(6) radially in the depression bar spacing and the quantity of arranging, should be definite according to combined factors such as the spacing of the span of notochord and Suo Li and hoop time rope and Suo Li.At outer shroud, the ridge cable force is bigger, can strengthen the radially spacing of middle depression bar; At interior ring, otherwise then.
(7) depression bar is arranged in the hoop spacing and quantity should be according to the span of last strop and Suo Li and radially the combined factors such as spacing and Suo Li of time rope are definite.During design, depression bar and can be made as definite value in the hoop with the spacing of angle depression bar, the last strop span of outer shroud is bigger, can increase radially in the quantity of depression bar; At interior ring, otherwise then, even need radially middle depression bar.
2) the initial prestressing force of inferior rope net cable dome structure
The initial prestressing force and the initial bit shape of full tension structure are closely-related.Obviously, inferior rope net cable dome structure is a redundant structure, has a plurality of initial prestressing force attitudes, therefore based on structure initial bit shape and mechanical characteristic, should follow following crucial principle and confirm reasonably initial prestressing force.
(1) going up strop in the initial bit shape is the straight line rope, and the radially initial prestressing force horizontal component of time rope that both sides are attached thereto should equate.
(2) notochord is the straight line rope in the initial bit shape, and the initial electrothermal prestressing of the hoop that both sides are attached thereto time rope should equate to horizontal component.
(3) time rope net is a plane rope net in the initial bit shape, and the initial prestressing force of the radially time rope on the straight line or each rope section of hoop time rope should equate.
(4) the antiskid bearing capacity of the initial prestressing force considered notochord cord clip of hoop time rope should avoid the initial prestressing force of hoop time rope excessive, causes the notochord cord clip to slide.Therefore, radially the initial prestressing force of time rope should be got higher value, and the initial prestressing force of hoop time rope should be got smaller value, and radially inferior Suo Gengjia is convenient to stretch-draw in the construction.
(5) interior nodes for depression bar in not having radially on the notochord reaches the node that depression bar in the hoop is arranged on the following strop, can not consider the initial prestressing force equilibrium conditions of its vertical pivot, and other all should satisfy initial prestressing force equilibrium conditions.
Claims (2)
1. time rope net cable dome structure; It is characterized in that this structure comprise notochord (1), broken line oblique cord (2), angle depression bar (3), down strop (4), radially in depression bar (5), go up in strop (6), the hoop depression bar (7) and by the radially time rope (8) of plane and the inferior rope net of hoop time rope (9) formation; Inferior rope network arrangements is in the main structure top macrolattice that is surrounded by notochord (1) and last strop (6); And link with notochord (1) and last strop (6), inferior rope net node is directly as the fulcrum of rigid roofing;
Depression bar in the hoop (7) is arranged between strop (6) and the following strop (4), and for last strop (6) provides elastic support, the vertical rigidity of strop in the raising (6) reduces the upward Suo Li of strop;
Radially middle depression bar (5) is arranged between notochord (1) and the broken line oblique cord (2), for notochord (1) provides elastic support, improves the vertical rigidity of notochord (1).
2. according to claim 1 rope net cable dome structure; It is characterized in that broken line oblique cord (2) is broken line shape; With radially in the junction of depression bar (5) have break; The initial precompression and the dynamic balance relation of the horizontal sextant angle fibrous root of each broken line depression bar (5) according to angle depression bar (3) with are radially confirmed, thus the length of depression bar (5) in confirming radially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101125937A CN102251616B (en) | 2011-05-03 | 2011-05-03 | Secondary cable net cable dome structure |
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| CN2011101125937A CN102251616B (en) | 2011-05-03 | 2011-05-03 | Secondary cable net cable dome structure |
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| CN102251616A CN102251616A (en) | 2011-11-23 |
| CN102251616B true CN102251616B (en) | 2012-11-28 |
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| CN2011101125937A Expired - Fee Related CN102251616B (en) | 2011-05-03 | 2011-05-03 | Secondary cable net cable dome structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3388455B2 (en) * | 1994-05-30 | 2003-03-24 | 清水建設株式会社 | String beam roof frame |
| EP1907646B1 (en) * | 2005-06-21 | 2010-10-20 | Arpad Kolozsvary-Kiss | Roof arches without bending moments |
| CN100532750C (en) * | 2007-03-30 | 2009-08-26 | 北京工业大学 | Cord string branch dome |
| CN202073178U (en) * | 2011-05-03 | 2011-12-14 | 东南大学 | Cable dome structure with a secondary cable net |
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- 2011-05-03 CN CN2011101125937A patent/CN102251616B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104420656A (en) * | 2013-08-29 | 2015-03-18 | 上海宝冶集团有限公司 | Traction tension forming mounting method of spherical rib annular type cable dome structure |
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