CN201649394U - Very large span prestressing double-layer and three-layer combined net-twisting casing simply supported at the edges - Google Patents
Very large span prestressing double-layer and three-layer combined net-twisting casing simply supported at the edges Download PDFInfo
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- CN201649394U CN201649394U CN2010201700751U CN201020170075U CN201649394U CN 201649394 U CN201649394 U CN 201649394U CN 2010201700751 U CN2010201700751 U CN 2010201700751U CN 201020170075 U CN201020170075 U CN 201020170075U CN 201649394 U CN201649394 U CN 201649394U
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Abstract
The utility model discloses a very large span prestressing double-layer and three-layer combined net-twisting casing simply supported at the edges, including a net-twisting casing (1), which is provided with frame poles (2) with different heights according to the requirement of pole net space length on its circumference, and the center of each edge of the net-twisting casing (1) is provided with a central frame pole (3); suspension positions of the net-twisting casing (1) are all simply supported on the top parts of the frame poles (2); and each central frame pole (3) is provided with a prestressed cable (4). The combined net-twisting casing is capable of not only providing a good structure integrality, greatly improving structural side resistance stiffness and eliminating hidden dangers caused by very large suspensions, but also further optimizing structure steel, reducing steel use quantity greatly to reach the requirement of saving energy and improving efficiency; the combined net-twisting casing is especially suitable for very large span net-twisting net house casing with a span of 120m to 180m, and has a safe, reasonable, advanced and economical novel architecture.
Description
Technical field
The utility model relates to a kind of new shaped steel and turns round grid shell roof structure, and (120m ≦ l ≦ 180m) simple supported edge prestressing force is double-deck turns round grid shell roof with three layers of combination to particularly a kind of super-span, belongs to the technical field of construction steel structure.
Background technology
The roof system that many prestressing combination are turned round latticed shell structure has appearred in the mid-90 in last century in succession, as Qingyuan City sports palace, Guangdong Province, its plane is a hexagon, turning round the net shell by six bilayers is bearing in respectively on the six roots of sensation capital, herein also for turning round the minimum point of net shell, its post limit is 68.418m to the span on post limit, the maximum 12.615m that encorbelments, hexagon roof system diagonal span is 93.645m, whole roof system forms negative gauss curvature, promptly cuts along adjacent two post limits, and the net shell upwards arches upward and cable wire forms the pull bar arch, when tightening up cable wire and setting up prestressing force, the net shell will upwards be arched upward.Structure makes the net shell produce distortion opposite with load action and opposite internal force in " one-tenth form " (prestressing force stage), the distortion and the internal force of operational phase are the distortion in two stages and the stack of internal force and roof system builds up afterwards, make the most of rod member internal force of net shell reduce (" subtracting the power bar "), fraction rod member internal force increases (" reinforcement bar "); The combinational network shell adopts prestressing force can reduce net shell amount of deflection and reduces net shell rod member internal force, thereby reduces steel using amount.It is that its intersection truss is the translation of orthoscopic parallel chord truss and forms hyperboloid that hyperbolic is turned round another advantage of net shell, need not knee and just forms hyperboloid.Grid shell roof is turned round in the double-deck combination of the prestressing force of rectangle plane, as Gaoyao City, Guangdong Province Factors for Gymnasium Roof Structures.It turns round the net shell by four bilayers, and to be bearing in north and south two post spans respectively be 60m, and thing two post spans are on four steel concrete capitals of 72m.Its prestressed cable is located on four bearings of net shell, is the minimum point of net shell.Turn round the internal force size distribution rule of net shell according to combination, also can turn round the single, double layer combination of net shell with every and arrange, as sports palace, Xinxing County, the Guangdong rectangle plane roof system that built up in 1997, north and south two column spacings are 60m, and thing two column spacings are 68m.Sports palace, Guiping City, Guangxi, roof system plane are rectangle also, and turning round the net shell also is single double-deck combination, and the North and South direction span is 66m, and the east-west direction span is 72m.These prestressing combination of having built up are turned round the net shell following characteristics: one, the post of bearing torque grid shell roof seldom, the quantity of its bearing post also is to turn round the quantity of net shell, forms multi-point support; They are two years old, because bearing post is few, turning round net shell bight for every has a very big span of encorbelmenting (span of encorbelmenting in Qingyuan City sports palace, Guangdong Province is 12.615m, and the span of encorbelmenting in sports palace, Gaoyao City, Guangdong is 22.67m, and the span of encorbelmenting in sports palace, Xinxing County, Guangdong is 24.42m; Its three, the span of roof system is between 60～75m, if having difficulty as super-span.From its three characteristic analysis, when span is 2～3 times that 120～180m(reaches the former) time, reach 150m as 150m * 150m two to span, if turning round the net shell by four combines, the mid point on four limits is established four root posts (as shown in Figure 2), will produce following adverse effect: one, the big (27225m of roof system area coverage
2), bearing post is few, the vertical pressure that causes every post to bear huge (more than the 1500t), and such heavy construction has only the supporting of four posts, its anti-side rigidity extreme difference; When two, span transfinited (surpassing 120m), the span of encorbelmenting that roof system is four jiaos also transfinited (surpassing 40m), and the span of encorbelmenting that its roof system is four jiaos is 63.6m, forms the dual form of structure that transfinites.When the reasonability of structure was doubted, its integral rigidity and stability also were affected.This is should be avoided in the structure design as far as possible; They are three years old, because the span super large (150m * 150m), the net thickness of the shell is big, general h=8000～9000mm, diagonal web member length reaches 8835～9750mm in the net shell, and it bears draws, pressure is all very little, and most of rod member is by the control of " slenderness ratio " structure, when span was the 60m～90m left and right sides, the web member diameter only was
, when web member reached 9m～10m, the web member diameter was
Be five times of common span net shell web member Unit Weight, and super-span is turned round net shell web member total length and is often turned round the upper and lower chord member total length of net shell more than 1.5 times greater than common span, so, conventional super-span network is generally made three layers, and purpose is to reduce web member length, the web member steel using amount is descended.But after all changing three layers into by bilayer, the number of nodes of whole net shell increases by 1/3, though net shell web member length reduces, rod member (comprising middle chord member) quantity increase is very remarkable.Also increased simultaneously difficulty of construction, turned round the net shell and do not reach the purpose that reduces steel using amount for conventional three layers.Along with the fast development of economic construction, public buildings such as the physical culture of super-span, exhibition, experiment are more and more many, how can reduce steel using amount, reduce construction costs under structural safety, reliable, the prerequisite that is suitable for guaranteeing, are still a difficult problem so far.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of super-span simple supported edge prestressing force bilayer to turn round the net shell with three layers of combination.This is turned round the net shell and is applicable to that span turns round grid shell roof at the super-span of 120m～180m, can reach the purpose that reduces steel using amount, reduces construction costs, thereby overcome the deficiencies in the prior art under structural safety, reliable, the prerequisite that is suitable for guaranteeing.
For solving the problems of the technologies described above the technical solution of the utility model: super-span simple supported edge prestressing force is double-deck turns round latticed shell structure with three layers of combination.Comprise and turn round the net shell, be provided with highly unequal frame column by the requirement of post net spacing, be provided with the central frame post in the every limit central authorities of turning round the net shell at the described periphery of turning round the net shell; The equal freely-supported in the position of encorbelmenting of turning round the net shell is in the top of frame column; At every limit central frame post upper bracket of turning round the net shell prestressed cable is housed.
Above-mentioned super-span simple supported edge prestressing force is double-deck to be turned round in the latticed shell structure with three layers of combination, and the described frame column height of turning round the every limit of net shell raises by linearity along two ends from central frame column; The height of central frame post post is minimum, and the frame column height of turning round net shell bight is the highest.
Aforesaid super-span simple supported edge prestressing force is double-deck to be turned round in the latticed shell structure with three layers of combination, and described prestressed cable is to be fixed on the top support node of turning round the every limit of net shell central frame post.
Aforesaid super-span simple supported edge prestressing force is double-deck to be turned round in the net shell with three layers of combination, and described to turn round the stressed big position of net shell be the three-layer network shell, and stressed less position is a Double-level Reticulated Shell.
Aforesaid super-span simple supported edge prestressing force is double-deck to be turned round in the net shell with three layers of combination, and described " cross " position and the peripheral frame trestle inner edge scope of turning round net shell centre is the three-layer network shell, and other positions are Double-level Reticulated Shell.
Aforesaid super-span simple supported edge prestressing force is double-deck to be turned round in the net shell with three layers of combination, and described three-layer network shell accounts for turns round 20～30% of the net shell gross area, and Double-level Reticulated Shell accounts for turns round 70～80% of the net shell gross area.
Aforesaid super-span simple supported edge prestressing force is double-deck to be turned round in the net shell with three layers of combination, and the described length of encorbelmenting of turning round the net shell only is roof system cornice length.
Aforesaid super-span simple supported edge prestressing force is double-deck to be turned round in the net shell with three layers of combination, and the described net shell of turning round is rectangle or square planar, and its span is the super-span of 120～180m.
The beneficial effects of the utility model: compared with prior art, " the super-span simple supported edge holds the prestressing force bilayer and turns round the net shell with three layers of combination " that the utility model proposes is a kind of novel roof structure form, the super-span that is particularly useful for span and is 120～180m is turned round grid shell roof, is a kind of safe, reasonable, advanced, economic new structure system.The utility model adopts periphery by the requirement of post net spacing, along turning round net shell periphery highly unequal frame column is set, make and turn round the equal freely-supported in net shell periphery position in the Vierendeel girder top of periphery, its length of encorbelmenting only is roof system cornice length (7.5m～15m), handle the net shell like this and do not have the super large problem of encorbelmenting, thereby make this type of super-span structure can not become the unreasonable form of structure of " dual transfiniting ".And replace the steel tie-rod at every minimum point (the every limit mid point) bearing of turning round the net shell with prestressed cable and set up prestressing force, because will making, the prestressing force effect turns round the net shell generation distortion opposite with load action, thereby make each rod member of net shell produce the internal force opposite with load action, each rod member internal force of net shell is reduced, reach the purpose that reduces steel using amount.The utility model when super-span, is designed to three layer with stressed big position according to turning round net shell distribution of internal force rule, and stressed less position is designed to bilayer.Form " super-span simple supported edge prestressing force is double-deck turns round latticed shell structure with three layers of combination ", this structural system not only has good structural integrity, increase substantially the anti-side rigidity of structure, eliminated the hidden danger that super large is encorbelmented and brought, and further optimized structural steel, steel using amount is descended significantly, reach the requirement of " energy efficiency ", guaranteeing to reach the reduction steel using amount under structural safety, reliable, the prerequisite that is suitable for, reduce the purpose of construction costs.
The utility model and conventional prestressing combination are turned round the net shell and are relatively had three big innovative points: one, periphery is provided with the peripheral frame trestle by the requirement of post net, both prevented to turn round encorbelment the greatly appearance of " transfiniting " of net shell, the globality and the anti-side rigidity of whole roof structure have been improved again, simultaneously, also improved combination and turned round net shell mechanical characteristic, when guaranteeing that the rigidity of structure requires, because prestressing effect reduces net shell internal force, reduce steel using amount.They are two years old, the three-layer network shell of routine is turned round the loading characteristic of net shell and distribution of internal force rule according to the super-span prestressing combination, and to change into stressed big part be three layers (accounting for the gross area 20%), stressed less position still is double-deck (account for the gross area 80%), this form of structure can reduce steel using amount significantly, both reduced by three layers of combination and turned round node and the rod member quantity of net shell, optimize structural steel again, reduced steel using amount, reached " energy-saving and emission-reduction " effect.Its three, turning round net shell span when prestressing combination is under the out-of-limit condition of 120～180m, super large no longer occurs and encorbelments, thereby prevent the appearance of the irrational mix form of " dual transfiniting ".Press the post net by periphery and form the frame structure, avoided turning round encorbelmenting greatly of encorbelment greatly or transfinite (surpassing 40m) that net shell across corner forms; Make and turn round the net shell along simple supported edge, the improvement of fringe conditions causes combination to turn round the improvement of net shell mechanical characteristic; Simultaneously, whole super-span structural integrity and anti-side rigidity are increased substantially.
Description of drawings
Fig. 1 is an axonometric drawing of the present utility model;
Fig. 2 is that the latticed shell structure axonometric drawing is turned round in the double-deck combination of existing four posts supporting prestressing force;
Fig. 3 is a layout plan of the present utility model;
Fig. 4 is the A-A sectional view of Fig. 3;
Fig. 5 is a positive facade structural configuration sketch of the present utility model;
Fig. 6 is bilayer and the three-layer network lattice arrangement diagram that the utility model 1/4 monolithic is turned round the net shell;
Fig. 7 is I-I sectional drawing of Fig. 6;
Fig. 8 is II-II sectional drawing of Fig. 6;
Fig. 9 is III-III sectional drawing of Fig. 6.
Below in conjunction with the drawings and specific embodiments the utility model is further described.
The specific embodiment
Embodiment 1.As shown in Figure 1, present embodiment is certain ultra-large type experiment hall, the planar dimension of turning round net shell 1 is 150m * 150m, square, the post of post net is 7.5m apart from every limit, the every length of side 20 * 7.5m=150m, be provided with 20 frame trestles 2 that highly do not wait and 1 central frame post 3 turning round net shell 1 every limit, totally 21 frame columns, its height from central frame column 3(absolute altitude minimum+10.0m), along two ends by linearity be elevated to the bight post (absolute altitude is the highest+23.2m), the height of central frame post 3 is minimum, the frame column 2 of turning round net shell 1 bight is highly the highest, and rising forms 10 ° angle from the middle to both ends.The equal freely-supported in the position of encorbelmenting of turning round net shell 1 is in the top of frame column 2.Prestressed cable 4 is arranged on the top support node of turning round net shell 1 every limit central frame post 3, also is the whole latticed shell structure minimum point of turning round herein.4 liang of end nodes of prestressed cable are the stretch-draw end, it also is anchored end, when the stretch-draw prestressing force cable wire is set up prestressing force, the upwards effect of arching upward of distortion of steel screen that makes is arranged, form distortion and the internal force opposite with the roofing vertical load, distortion and internal force that prestressing force is made the structure " load attitude " under the distortion of time spent structure " one-tenth form " and internal force and the load action are just in time opposite, then roof structure is the stack of preceding two condition at the distortion and the internal force of normal operating condition, reduce malformation thereby reach, improve the rigidity of structure and reduce to turn round net shell rod member internal force, reduce the effect of structural steel amount.The present invention adopts double-deck method of arranging with the combination of three-layer network shell, at the stressed big position of whole latticed shell structure, as cross position in the middle of Fig. 3 and peripheral bearing inner edge position is three-layer network shell 5, other stressed little positions are Double-level Reticulated Shell 6, wherein three-layer network shell 5 accounts for and turns round 20% of net shell 1 gross area, 80% is Double-level Reticulated Shell 6, cause rod member quantity, number of nodes to descend significantly, it had both guaranteed the bearing capacity and the rigidity requirement of structure, reduce the structural steel amount again significantly, thereby shown the novelty and the advance of this type of novel pre-stressed steel lattice structure.The whole Double-level Reticulated Shell of turning round net shell 16 and the layout of three-layer network shell 5 are seen the 1/4 grid arrangement diagram of Fig. 6, and its I-I, II-II, III-III section are seen Fig. 7, Fig. 8, Fig. 9 respectively.Fig. 3 is the arrangement diagram of whole net shell and double-deck and three-layer network shell, its diagonal profile as shown in Figure 4, its diagonal span of encorbelmenting is reduced to 10.6m by original 63.6m, and " dual transfiniting " unreasonable form of structure of avoiding encorbelmenting of original structure form to transfinite being caused occurs.
Embodiment of the present utility model is not limited to the foregoing description, all belongs within the protection domain of the present utility model in the various variations of making under the prerequisite that does not break away from the utility model aim.
Claims (8)
1. a super-span simple supported edge prestressing force bilayer is turned round the net shell with three layers of combination, comprise and turn round net shell (1), it is characterized in that: be provided with highly unequal frame column (2) at the described periphery of turning round net shell (1) by the requirement of post net spacing, be provided with central frame post (3) in the every limit central authorities of turning round net shell (1); The equal freely-supported in the position of encorbelmenting of turning round net shell (1) is in the top of frame column (2); Prestressed cable (4) is housed turning round on every limit central frame post (3) of net shell (1).
2. super-span simple supported edge prestressing force according to claim 1 is double-deck turns round the net shell with three layers of combination, it is characterized in that: described frame column (2) height of turning round the every limit of net shell (1) raises by linear along two ends from central frame column (3); The height of middle boxes trestle (3) is minimum, and the frame column (2) of turning round net shell (1) bight is highly the highest.
3. super-span simple supported edge prestressing force according to claim 1 is double-deck turns round the net shell with three layers of combination, and it is characterized in that: described prestressed cable (4) is fixed on the top support node of turning round net shell (1) every limit central frame post (3).
4. super-span simple supported edge prestressing force according to claim 1 is double-deck turns round the net shell with three layers of combination, it is characterized in that: described to turn round the stressed big position of net shell (1) be the three-layer network shell, and stressed less position is a Double-level Reticulated Shell.
5. super-span simple supported edge prestressing force according to claim 4 is double-deck turns round the net shell with three layers of combination, it is characterized in that: described " cross " position and peripheral frame trestle (2) the inner edge scope of turning round net shell (1) centre is three-layer network shell (5), and other positions are Double-level Reticulated Shell (6).
6. super-span simple supported edge prestressing force according to claim 5 is double-deck turns round the net shell with three layers of combination, it is characterized in that: described three-layer network shell (5) accounts for turns round 20～30% of net shell (1) gross area, and Double-level Reticulated Shell (6) accounts for turns round 70～80% of net shell (1) gross area.
7. super-span simple supported edge prestressing force according to claim 1 is double-deck turns round the net shell with three layers of combination, it is characterized in that: the described length of encorbelmenting of turning round net shell (1) only is roof system cornice length.
8. turn round the net shell according to any described super-span simple supported edge prestressing force is double-deck in the claim 1～7 with three layers of combination, it is characterized in that: the described net shell (1) of turning round is rectangle or square planar, and its span is the super-span of 120～180m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201700751U CN201649394U (en) | 2010-04-26 | 2010-04-26 | Very large span prestressing double-layer and three-layer combined net-twisting casing simply supported at the edges |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201700751U CN201649394U (en) | 2010-04-26 | 2010-04-26 | Very large span prestressing double-layer and three-layer combined net-twisting casing simply supported at the edges |
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| CN201649394U true CN201649394U (en) | 2010-11-24 |
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| CN2010201700751U Expired - Lifetime CN201649394U (en) | 2010-04-26 | 2010-04-26 | Very large span prestressing double-layer and three-layer combined net-twisting casing simply supported at the edges |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235032A (en) * | 2010-04-26 | 2011-11-09 | 贵州大学 | Super-large span peripheral simply-supported prestressed double-layer and three-layer combined torsional reticulated shell structure |
| CN102635162A (en) * | 2012-04-09 | 2012-08-15 | 浙江东南网架股份有限公司 | Combined torsional reticulated shell and construction method thereof |
| CN107916740A (en) * | 2017-12-22 | 2018-04-17 | 贵州大学 | Double slope grid shell roof structures of assembled large-span concrete and preparation method thereof |
-
2010
- 2010-04-26 CN CN2010201700751U patent/CN201649394U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235032A (en) * | 2010-04-26 | 2011-11-09 | 贵州大学 | Super-large span peripheral simply-supported prestressed double-layer and three-layer combined torsional reticulated shell structure |
| CN102235032B (en) * | 2010-04-26 | 2015-10-28 | 贵州大学 | Super-span simple supported edge prestressing force is double-deck turns round latticed shell structure with three layers of combination |
| CN102635162A (en) * | 2012-04-09 | 2012-08-15 | 浙江东南网架股份有限公司 | Combined torsional reticulated shell and construction method thereof |
| CN107916740A (en) * | 2017-12-22 | 2018-04-17 | 贵州大学 | Double slope grid shell roof structures of assembled large-span concrete and preparation method thereof |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20101124 Effective date of abandoning: 20151028 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |