CN103526826A - Space truss string structure with cables arranged inside - Google Patents
Space truss string structure with cables arranged inside Download PDFInfo
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- CN103526826A CN103526826A CN201310497613.6A CN201310497613A CN103526826A CN 103526826 A CN103526826 A CN 103526826A CN 201310497613 A CN201310497613 A CN 201310497613A CN 103526826 A CN103526826 A CN 103526826A
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- space truss
- prestressed cable
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Abstract
The invention discloses a space truss string structure with cables arranged inside. The space truss string structure with the cables arranged inside comprises a space truss body, wherein the space truss body is formed by connection of a bi-directional upper chord arranged horizontally, a bi-directional lower chord arranged horizontally and a web member through space truss nodes, the planar projection of the upper chord and the planar projection of the lower chord are staggered or crossed, a plurality of support nodes opposite in pairs in the span direction are arranged on the space truss body, a prestress inhaul cable is arranged between at least one pair of support nodes, the end portion of the prestress inhaul cable is fixed on the corresponding support nodes and is connected to the space truss body, and the sag of the prestress inhaul cable is smaller than the thickness h of the space truss string structure. According to the space truss string structure with the cables arranged inside, large span and large space required by a building can be realized under the condition that the thickness of the space truss is small, and excessive deflection caused by poor vertical stiffness of the space truss is avoided at the same time.
Description
Technical field
The present invention relates to the prestressed structure system in a kind of building structure, particularly relate to a kind of wide Nei Busuo string and prop up space truss structure.
Background technology
Space truss structure is a kind of three-dimensional space grid structural system that engineering field is conventional, and it has structure and member stress is reasonable, calculate design software maturation, the indeterminate degree of safety of high order is high, processing and fabricating mechanization degree advantages of higher.But when architectural space claimed structure span is larger, the rack that thickness is less if adopt structure vertical rigidity is not enough, under load action, amount of deflection is large, and thickness is less, under same load action, require top-bottom chord part cross section larger, and also exist following several respects not enough while adopting the larger rack of thickness:
1) when rack thickness is larger, impact building usage space, if will guarantee, building usage space needs to improve whole depth of building, and each Specialty Design economy is reduced;
2) the larger rack of thickness, web member is longer, makes most web members because the control of slenderness ratio index needs increasing section specification, thereby increases steel using amount, increases cost;
3) when rack thickness is larger, to the scene of structure, installs and construct and also increased difficulty.
Summary of the invention
The present invention provides a kind of wide Nei Busuo string to prop up space truss structure for solving the technical problem existing in known technology, this space truss structure can realize building required large span and large space in the situation that rack thickness is less, can avoid rack because of the not enough excessive problem of amount of deflection causing of vertical rigidity simultaneously.
The technical scheme that the present invention takes for the technical problem existing in solution known technology is: a kind of wide Nei Busuo string props up space truss structure, comprise rack body, described rack body is the upper chord of being arranged by two-way horizontal, the lower chord that two-way horizontal is arranged and web member are connected and are formed by grid node, and the plane projection of described upper chord and described lower chord is mutually staggered or is intersected, on this rack body, be provided with along the paired relative a plurality of support nodes of span direction, between at least one pair of support node, be provided with a prestressed cable, the end anchorage of described prestressed cable is on described support node, described prestressed cable is connected on described rack body, the sag f of described prestressed cable is less than the thickness h of this space truss structure.
Described prestressed cable is connected with described upper chord by least one strut vertically arranging.
Described prestressed cable is connected with described lower chord by least one pair of hoist cable, and every pair of hoist cable is comprised of two hoist cables that are arranged symmetrically in described prestressed cable both sides.
Described prestressed cable is connected with described lower chord by least one group of hoist cable, and every group of hoist cable forms by four, and four hoist cables are arranged symmetrically in the both sides of described prestressed cable.
Advantage and good effect that the present invention has are: adopt prestressed cable to be pulled between paired support node, prestressed cable is positioned at rack body profile, does not take interior architecture space, has strengthened aesthetics; Prestressed cable can improve rack body rigidity by applying prestressing force, reduces the amount of deflection of rack body under load action; Can avoid because thereby rack body span is compared with the excessive problem that takies larger building height of rack body thickness causing greatly, and then can reduce by slenderness ratio, to be controlled in space truss structure the cross section specification of rod member, save steel using amount, reduce cost.Be specially adapted to that span is large, aspect ratio is large, rectangle plane and the less space truss structure of building requirements structural thickness.
Accompanying drawing explanation
Fig. 1 is the three-dimensional structure schematic diagram of the embodiment of the present invention 1;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is the elevation of Fig. 1;
Fig. 4 is the lateral view of Fig. 1;
Fig. 5 is the three-dimensional structure schematic diagram of the embodiment of the present invention 2;
Fig. 6 is the plan view of Fig. 5;
Fig. 7 is the elevation of Fig. 5;
Fig. 8 is the lateral view of Fig. 5;
Fig. 9 is the three-dimensional structure schematic diagram of the embodiment of the present invention 3;
Figure 10 is the plan view of Fig. 9;
Figure 11 is the elevation of Fig. 9;
Figure 12 is the lateral view of Fig. 9.
In figure: 1, upper chord; 2, lower chord; 3, web member; 4, prestressed cable; 5, turnover node; 6, support node; 7, strut; 8, hoist cable; 9, grid node; F: prestressed cable sag; H: rack thickness.
The specific embodiment
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1～Figure 12, a kind of wide Nei Busuo string props up space truss structure, comprise rack body, described rack body is that the upper chord 1 of being arranged by two-way horizontal, the lower chord 2 that two-way horizontal is arranged are connected and are formed by grid node 9 with web member 3, for example, and the plane projection of described upper chord 1 and described lower chord 2 is mutually staggered or intersects: square pyramid space grid, just put the square pyramid space grid of finding time, unidirectional fold-line-shaped rack, tessellate square pyramid space grid, tiltedly put square pyramid space grid and star square pyramid space grid.On above-mentioned rack body construction, be provided with along the paired relative a plurality of support nodes 6 of span direction, feature of the present invention is, between at least one pair of support node 6, be provided with a prestressed cable 4, the end anchorage of described prestressed cable 4 is on described support node 6, described prestressed cable 4 is connected on described rack body, and the sag f of described prestressed cable 4 is less than the thickness h of this space truss structure.
Described prestressed cable 4 can have following three kinds with the syndeton of described rack body: 1) described prestressed cable 4 is connected with described upper chord 1 by least one strut 7 vertically arranging; 2) described prestressed cable 4 is connected with described lower chord 2 by least one pair of hoist cable, and every pair of hoist cable is comprised of two hoist cables 8 that are arranged symmetrically in described prestressed cable 4 both sides.3) described prestressed cable 4 is connected with described lower chord 2 by least one group of hoist cable, and every group of hoist cable forms by four, and four hoist cables 8 are arranged symmetrically in the both sides of described prestressed cable 4.
Now in conjunction with the embodiments, above-mentioned space truss structure is described further:
Embodiment 1:
Refer to Fig. 1～Fig. 4, a kind of wide Nei Busuo string props up space truss structure, comprise rack body, described rack body is that the upper chord 1 of being arranged by two-way horizontal, the lower chord 2 that two-way horizontal is arranged are connected and are formed by grid node 9 with web member 3, and the plane projection of described upper chord 1 and described lower chord 2 is mutually staggered or intersects, in the present embodiment, rack body is square pyramid space grid.On above-mentioned rack body construction, be provided with along paired eight the relative support nodes 6 of span direction, between four pairs of support nodes 6, be respectively provided with a prestressed cable 4, the end anchorage of described prestressed cable 4 is on described support node 6, and the sag f of described prestressed cable 4 is less than the thickness h of this space truss structure.Described prestressed cable 4 is connected with described upper chord 1 by three struts 7 that vertically arrange.The employing support pattern that winds up, described prestressed cable 4 is positioned at rack body profile scope, and described prestressed cable 4 is connected with the lower end of described strut 7 by turnover node 5, and the upper end of described strut 7 is connected to the rack node that winds up.Above-mentioned grid node form can adopt welded hollow spherical joints, bolted spherical node or cast steel node and other space structures nodes.
Embodiment 2:
Refer to Fig. 5～Fig. 8, be with the difference of embodiment 1, described prestressed cable 4 is connected with described lower chord 2 by two pairs of hoist cables, and every pair of hoist cable is comprised of two hoist cables 8 that are arranged symmetrically in described prestressed cable 4 both sides.Described prestressed cable 4 is connected with the upper end of hoist cable 8 by turnover node 5, described in hang 8 lower end and be connected to rack lower-chord panel point.
Embodiment 3:
Refer to Fig. 9～Figure 12, be with the difference of embodiment 2, described prestressed cable 4 is connected with described lower chord 2 by three groups of hoist cables, and every group of hoist cable forms by four, and four hoist cables 8 are arranged symmetrically in the both sides of described prestressed cable 4.
In the above-described embodiments, the quantity of every prestressed cable 4 corresponding turnover node, strut or hoist cables that connect is relevant with structural span.
Above-mentioned string props up space truss structure, by prestressed cable being set in the less rack body of thickness, solve preferably the not aesthetic problem that rack body span causes because increasing rack thickness when large, by applying pretension, solved preferably the excessive and thicker problem of chord member part of winding up of amount of deflection that little thickness rack vertical rigidity deficiency causes.Flexibility due to building plane layout, when roof system rack is not all positions span when larger, can only in the larger position of span, prestressed cable be set, both guaranteed the unity of whole rack thickness, strengthen aesthetics, guaranteed again the bearing capacity and stiffness performance of the larger positional structure of span.
The technical scheme of propping up space truss structure about above-mentioned string has obtained the subsidy of University Of Tianjin's autonomous innovation fund.
Although by reference to the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, can also make a lot of forms, within these all belong to protection scope of the present invention.
Claims (4)
1. a wide Nei Busuo string props up space truss structure, comprise rack body, described rack body is the upper chord of being arranged by two-way horizontal, the lower chord that two-way horizontal is arranged and web member are connected and are formed by grid node, and the plane projection of described upper chord and described lower chord is mutually staggered or is intersected, on this rack body, be provided with along the paired relative a plurality of support nodes of span direction, it is characterized in that, between at least one pair of support node, be provided with a prestressed cable, the end anchorage of described prestressed cable is on described support node, described prestressed cable is connected on described rack body, the sag f of described prestressed cable is less than the thickness h of this space truss structure.
2. wide Nei Busuo string according to claim 1 props up space truss structure, it is characterized in that, described prestressed cable is connected with described upper chord by least one strut vertically arranging.
3. wide Nei Busuo string according to claim 1 props up space truss structure, it is characterized in that, described prestressed cable is connected with described lower chord by least one pair of hoist cable, and every pair of hoist cable is comprised of two hoist cables that are arranged symmetrically in described prestressed cable both sides.
4. wide Nei Busuo string according to claim 1 props up space truss structure, it is characterized in that, described prestressed cable is connected with described lower chord by least one group of hoist cable, and every group of hoist cable forms by four, and four hoist cables are arranged symmetrically in the both sides of described prestressed cable.
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| CN201310497613.6A CN103526826A (en) | 2013-10-18 | 2013-10-18 | Space truss string structure with cables arranged inside |
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| CN201310497613.6A CN103526826A (en) | 2013-10-18 | 2013-10-18 | Space truss string structure with cables arranged inside |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060740A (en) * | 2014-06-11 | 2014-09-24 | 江苏科技大学 | Double-layer column surface net shell with lower chord being prestressed stay rope |
| CN114411951A (en) * | 2022-03-03 | 2022-04-29 | 中国建筑西南设计研究院有限公司 | Local chord is supported and is made up spatial grid structure |
| 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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| CN202611060U (en) * | 2012-04-15 | 2012-12-19 | 杭州纽创工业设计有限公司 | Stretching string beam mechanism for steel structure building |
| CN203514510U (en) * | 2013-10-18 | 2014-04-02 | 天津大学建筑设计研究院 | Profile inner distributed cable supported net rack structure |
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2013
- 2013-10-18 CN CN201310497613.6A patent/CN103526826A/en active Pending
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| US5355641A (en) * | 1990-11-02 | 1994-10-18 | Weidlinger Associates, Inc. | Triangulated cable dome with retractable roof |
| FR2689920A1 (en) * | 1992-04-14 | 1993-10-15 | Walter Ets Lucien | Temporary structure, e.g. for hall, circus tent or hangar - has frame made from aluminium sections in buttressed arches and masts to take weight of upper section |
| CN1877039A (en) * | 2006-07-07 | 2006-12-13 | 贵州大学 | Large-span periphery triangular pyramid simple-supporting and inside folding prestressed steel grid structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060740A (en) * | 2014-06-11 | 2014-09-24 | 江苏科技大学 | Double-layer column surface net shell with lower chord being prestressed stay rope |
| CN114411951A (en) * | 2022-03-03 | 2022-04-29 | 中国建筑西南设计研究院有限公司 | Local chord is supported and is made up spatial grid structure |
| CN114411951B (en) * | 2022-03-03 | 2023-09-05 | 中国建筑西南设计研究院有限公司 | Local chord support combined grid structure |
| 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: 20140122 |