CN104947793A - Truss-string structure with additional standby cables - Google Patents
Truss-string structure with additional standby cables Download PDFInfo
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- CN104947793A CN104947793A CN201510367827.0A CN201510367827A CN104947793A CN 104947793 A CN104947793 A CN 104947793A CN 201510367827 A CN201510367827 A CN 201510367827A CN 104947793 A CN104947793 A CN 104947793A
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Abstract
The invention discloses a truss-string structure with additional standby cables. The truss-string structure is composed of an upper truss, middle supporting rods, a lower inhaul cable, a supporting structure and the middle standby cables. The upper truss is a square quadrangular pyramid space arch truss which is composed of multiple upper chord members, lower chord members, diagonal web members and horizontal web members; the two ends of the lower inhaul cable are anchored at the ends of the upper truss; the multiple supporting rods are evenly arranged between the upper truss and the lower inhaul cable, and the top ends and the bottom ends of the supporting rods are connected with the lower chord members of the upper truss and the lower inhaul cable respectively; the two ends of the middle standby cables are connected with the lower chord members of the upper truss and the bottom ends of the supporting rods respectively; the supporting structure is composed of a fixed hinge support and a sliding hinge support which support the two ends of the upper truss respectively. Compared with a traditional truss-string structure, the redundancy rate of the truss-string structure with the additional standby cables is increased, and the progressive collapse resistance of the truss-string structure with the additional standby cables is improved. The truss-string structure is simple in structural form, convenient to construct, easy to realize and suitable for being applied to practical engineering.
Description
Technical field
The invention belongs to large-span prestressed space structures field, relate to a kind of truss-string-structure and the building method thereof of setting up rope for subsequent use.
Background technology
Truss string structure, primarily of the truss composition of the rope of lower flexible and top rigidity, is anchored at the two ends of truss to rope Shi Hanzhang, is connected between drag-line with truss by vertical strut.This structure is a kind of self-balancing blending space structure, can give full play to the examining tensile behavior of Materials with High Strength, have reasonable stress, from heavy and light, and simple structure, the advantages such as space spans ability is strong.Along with the development of China's construction business and the raising of architectural design level, truss-string-structure obtains increasing concern, is widely used in the important public building of the large space such as stadium, exhibition hall.
Truss-string-structure redundancy is lower, once bottom drag-line ruptures, remaining structure is impacted, and often occurs collapsing, and causes heavy casualties and serious economic loss.Therefore, compare with frame structure system with General Spatial structural system, this structure more needs to adopt anti-continuous collapse to design to it.
Summary of the invention
Technical problem: the invention discloses the truss-string-structure setting up rope for subsequent use that a kind of redundancy is high, progressive collapse-resisting ability strong, construct convenience, be easy to realization.
Technical scheme: the truss-string-structure setting up rope for subsequent use of the present invention, comprise top truss, the parallel many center stayrod be evenly arranged on the downside of the truss of described top, through bottom drag-line and the middle part rope for subsequent use that is arranged on adjacent two center stayrod of described center stayrod bottom, the two ends of described bottom drag-line are connected with the end of top truss respectively, the multiple middle parts rope for subsequent use arranged is symmetrically distributed in the center stayrod both sides of top truss span centre Nodes, one end of each middle part rope for subsequent use is connected with the top of center stayrod, the other end is connected with the bottom of adjacent center stayrod.
Further, top truss is that truss is encircleed in the quadrangular pyramid space of just putting be formed by connecting by many upper cord members, lower edge rod member, diagonal web member and horizontal web member.
Further, one end of top truss is provided with fixed-hinged support, and the other end is provided with sliding hinge bearing.
Further, center stayrod has 2N+1 root, and described middle part rope for subsequent use has 2N root, N be more than or equal to 1 natural number.
Further, the rope for subsequent use of the middle part below the truss of top connects successively, and adjacent two middle part ropes for subsequent use connect in the end of center stayrod.
Further, each middle part rope for subsequent use below the truss of top does not connect mutually.
In the present invention, middle part rope for subsequent use has 4 kinds of arrangements, and in often kind of mode, rope for subsequent use is arranged symmetrically in middle strut both sides, and rope for subsequent use does not apply structural initial pre stress;
The above-mentioned method of setting up the truss-string-structure of rope for subsequent use of structure of the present invention, comprises the following steps:
1) determine to set up the truss-string-structure middle and upper part truss span of rope for subsequent use and rod member size, the quantity of center stayrod and rod member size, bottom drag-line sectional dimension and structural initial pre stress value F and middle part rope sectional dimension for subsequent use according to structural span, load situation etc.;
2) adopt the horizontal method such as assembled, by the mode of bolt sphere or solder sphere, top truss member is carried out assembled connection;
3) center stayrod and bottom drag-line are installed, strut must be connected between top truss and bottom drag-line symmetrically;
4) stretch-draw is carried out to bottom stay cable end, after the internal force of drag-line reaches the structural initial pre stress value F of design, drag-line two ends sealing off and covering anchorage is fixed;
5) carry out integral hoisting to truss string structure, two ends are connected with the fixed-hinged support on bottom bracing structure and sliding hinge bearing respectively, and ensure its out-of-plane stability to structure applying lateral support.
6) install middle part rope for subsequent use, two ends are connected to top truss lower chord and strut bottom.
Beneficial effect: the present invention compared with prior art, has the following advantages:
1) existing truss string structure mostly adopt bottom drag-line to be set to the measure of method as the anti-continuous collapse of structure that High redundancy carried by two rope, but the force-mechanism of the non-change structure of the method, when bottom Cable failure, the Path of Force Transfer in structure changes not yet.And structure provided by the invention improves structural redundancy by setting up rope for subsequent use in truss string structure, change the force-mechanism of structure.When after the fracture of bottom single cable, rope for subsequent use can change the Path of Force Transfer in truss string structure, form local chord with low portion drag-line and mid portion strut and prop up structural system, alleviate drag-line to lose efficacy the impact caused remaining structure, improve the internal force of chord member of truss, reduce remaining structure vertical deflection, improve structure progressive collapse-resisting ability.
2) this form of structure is simple, and middle part rope for subsequent use is without the need to applying structural initial pre stress, and structure is convenient, and design and implementation method is similar with traditional truss string structure, is easy to realization, is adapted at applying in Practical Project.
Accompanying drawing explanation
Fig. 1 a is the truss-string-structure plan view setting up rope for subsequent use of the 1st kind of mode provided by the invention, and Fig. 1 b is the truss-string-structure shaft side figure setting up rope for subsequent use of the 1st kind of mode provided by the invention;
Fig. 2 a is the truss-string-structure plan view setting up rope for subsequent use of the 2nd kind of mode provided by the invention, and Fig. 2 b is the truss-string-structure shaft side figure setting up rope for subsequent use of the 2nd kind of mode provided by the invention;
Fig. 3 a is the truss-string-structure plan view setting up rope for subsequent use of the 3rd kind of mode provided by the invention, and Fig. 3 b is the truss-string-structure shaft side figure setting up rope for subsequent use of the 3rd kind of mode provided by the invention;
Fig. 4 a is the truss-string-structure plan view setting up rope for subsequent use of the 4th kind of mode provided by the invention, and Fig. 4 b is the truss-string-structure shaft side figure setting up rope for subsequent use of the 4th kind of mode provided by the invention;
Fig. 5 be provided by the invention set up rope for subsequent use truss-string-structure and the time-history curves of traditional truss-string-structure structure span centre modal displacement before and after drag-line lost efficacy.
Fig. 6 be provided by the invention set up rope for subsequent use truss-string-structure and the time-history curves of traditional truss-string-structure span centre upper chord internal force before and after drag-line lost efficacy.
Have in figure: top truss 1, center stayrod 2, bottom drag-line 3, middle part rope 4 for subsequent use, fixed-hinged support 5, upper cord member 7, lower edge rod member 8, diagonal web member 9 and horizontal web member 10 in sliding hinge bearing 6 and top truss.
Detailed description of the invention
Below in conjunction with embodiment and Figure of description, the present invention is further described in detail.
N is taken as 3, and the truss-string-structure that single Pin that namely middle part arranges 7 struts sets up rope for subsequent use is that example is described implementation method of setting up the truss-string-structure of rope for subsequent use provided by the invention.As shown in Fig. 1 to Fig. 4, a kind of truss-string-structure setting up rope for subsequent use of the present embodiment is made up of traditional truss string structure and middle part rope 4 for subsequent use, and middle part rope for subsequent use 4 is arranged symmetrically between traditional truss string structure middle and upper part truss 1 and bottom drag-line 3.
Truss string structure of the present invention, as shown in Fig. 1 to Fig. 4, comprises a top truss 1,7 center stayrod 2,1 bottom drag-line 3,1 fixed-hinged support 5,1 sliding hinge bearing 6.Wherein, top truss 1 is that truss is encircleed in the quadrangular pyramid space of just putting be formed by connecting by bolt sphere or solder sphere by upper cord member 7, lower edge rod member 8, diagonal web member 9 and horizontal web member 10.The two ends of bottom drag-line 3 are anchored on the ball node of top truss 1 end lower chord.7 struts are evenly arranged between top truss 1 and bottom drag-line 3, and top and bottom are connected with lower chord 8 and bottom drag-line 3 respectively.Fixed-hinged support 5 upper end is connected with the ball node of left end lower chord 8, and lower end is fixed on the bottom bracing structure of truss string structure.Sliding hinge bearing 6 is connected with the ball node of right-hand end lower chord 8, and lower end is connected with the bottom bracing structure of truss string structure in the mode of horizontal slip.
Rope for subsequent use is as shown in Fig. 1 to Fig. 4, and between top truss 1 and bottom drag-line 3, arrange 6 ropes 4 for subsequent use altogether, rope 4 for subsequent use is symmetrically distributed in span centre strut both sides, and two ends are connected with the ball node of lower chord 8 and strut 2 bottom respectively.
The truss-string-structure span of setting up rope for subsequent use in the present embodiment is 72m, and rise is 4.8m, and sag is 4.8m, and span centre strut height is 7.8m.The building method of the present embodiment comprises and carries out following steps in order:
1) span of the truss-string-structure middle and upper part truss 1 of rope for subsequent use and the size of rod member 7,8,9,10 is set up according to the design such as structural span, load situation, the quantity of center stayrod 2 and rod member size, the sectional dimension of the sectional dimension of bottom drag-line 3 and structural initial pre stress value F and middle part rope 4 for subsequent use, in the present embodiment, the quantity of center stayrod 2 is taken as 7;
2) adopt the horizontal method such as assembled, by the mode of bolt sphere or solder sphere, top truss member 7,8,9,10 is carried out assembled connection;
3) install center stayrod 2 and bottom drag-line 3, arranged symmetrically by strut 2, top and bottom are connected top truss 1 and bottom drag-line 3 respectively;
4) stretch-draw is carried out to bottom drag-line 3 end, after the internal force of drag-line reaches the structural initial pre stress value F of design, drag-line 3 two ends are anchored on the ball node of end lower chord 8;
5) carry out integral hoisting to truss string structure 1, two ends are connected to fixed-hinged support 5 on bottom bracing structure and sliding hinge bearing 6, apply lateral support ensure its lateral stability to structure.
6) install 6, middle part rope 4 for subsequent use, two ends are connected with the ball node of lower chord 8 and strut 2 bottom respectively.
In order to verify progressive collapse-resisting performance of setting up the truss-string-structure of rope for subsequent use provided by the invention, the present inventor utilizes finite element software, the dynamic response of remaining structure is investigated by removing single cable, nonlinear dynamic analysis is carried out to the Progressive Collapse of truss string structure, and has contrasted with traditional truss-string-structure.Fig. 5 and Fig. 6 sets forth the time-history curves of structure span centre modal displacement and span centre upper chord 7 internal force before and after drag-line lost efficacy.Visible, traditional truss string structure there occurs very soon and collapsed after drag-line loses efficacy, and the truss-string-structure setting up rope for subsequent use provided by the invention is except scheme 4, and all do not occur collapsing, component internal force reduces.Although scheme 4 remaining structure collapses, delay the time that remaining structure is collapsed compared with traditional truss string structure.In sum, the progressive collapse-resisting Performance Ratio tradition truss string structure setting up the truss string structure of rope for subsequent use provided is better.
Above-described embodiment is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention; some improvement and equivalent replacement can also be made; these improve the claims in the present invention and are equal to the technical scheme after replacing, and all fall into protection scope of the present invention.
Claims (6)
1. set up the truss-string-structure of rope for subsequent use for one kind, it is characterized in that, this structure comprises top truss (1), the parallel many center stayrod (2) being evenly arranged on downside, described top truss (1), through bottom drag-line (3) and middle part rope for subsequent use (4) that is arranged on adjacent two center stayrod (2) of described center stayrod (2) bottom, the two ends of described bottom drag-line (3) are connected with the end of top truss (1) respectively, multiple middle parts rope for subsequent use (4) arranged are symmetrically distributed in center stayrod (2) both sides of top truss (1) span centre Nodes, the one end at each middle part rope for subsequent use (4) is connected with the top of center stayrod (2), the other end is connected with the bottom of adjacent center stayrod (2).
2. the truss-string-structure setting up rope for subsequent use according to claim 1, it is characterized in that, described top truss (1) is that truss is encircleed in the quadrangular pyramid space of just putting be formed by connecting by many upper cord members (7), lower edge rod member (8), diagonal web member (9) and horizontal web member (10).
3. the truss-string-structure setting up rope for subsequent use according to claim 1, is characterized in that, the one end on described top truss (1) is provided with fixed-hinged support (5), and the other end is provided with sliding hinge bearing (6).
4. the truss-string-structure setting up rope for subsequent use according to claim 1, is characterized in that, described center stayrod (2) has 2N+1 root, and described middle part rope for subsequent use (4) has 2N root, N be more than or equal to 1 natural number.
5. the truss-string-structure setting up rope for subsequent use according to claim 1,2,3 or 4, it is characterized in that, middle part rope for subsequent use (4) of below, described top truss (1) connects successively, and adjacent two middle parts rope for subsequent use (4) connect in the end of center stayrod (2).
6. the truss-string-structure setting up rope for subsequent use according to claim 1,2,3 or 4, is characterized in that, each middle part rope for subsequent use (4) of below, described top truss (1) does not connect mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510367827.0A CN104947793A (en) | 2015-06-29 | 2015-06-29 | Truss-string structure with additional standby cables |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510367827.0A CN104947793A (en) | 2015-06-29 | 2015-06-29 | Truss-string structure with additional standby cables |
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| CN104947793A true CN104947793A (en) | 2015-09-30 |
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| CN201510367827.0A Pending CN104947793A (en) | 2015-06-29 | 2015-06-29 | Truss-string structure with additional standby cables |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105234217A (en) * | 2015-11-05 | 2016-01-13 | 江苏理工学院 | Upper pressure roller supporting truss for ultra-wide plate bending machine |
| CN106836497A (en) * | 2016-12-22 | 2017-06-13 | 浙江精工钢结构集团有限公司 | A kind of pair of rope separate type truss string structure and its construction method |
| CN113431191A (en) * | 2021-07-20 | 2021-09-24 | 福州大学 | Four-side annular cable supported dome structure for preventing cable from continuously collapsing due to failure |
| CN114837483A (en) * | 2022-04-29 | 2022-08-02 | 北京建工集团有限责任公司 | High-low span portal steel frame building structure and construction process thereof |
| CN115897805A (en) * | 2022-11-30 | 2023-04-04 | 中南建筑设计院股份有限公司 | Linear cross truss string space structure |
| CN116180979A (en) * | 2023-02-22 | 2023-05-30 | 中国十七冶集团有限公司 | Combined truss of large-span special-shaped assembled pc component based on BIM technology |
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| DE1709434A1 (en) * | 1966-07-08 | 1974-04-18 | Franz Brell | MULTI-PURPOSE HALL |
| CN2799724Y (en) * | 2004-11-01 | 2006-07-26 | 贵州大学 | Short backing-bar type truss string structure |
| CN201347586Y (en) * | 2008-12-17 | 2009-11-18 | 广州市设计院 | Large-span prestressed cable-supported truss structure |
| CN202108115U (en) * | 2011-06-03 | 2012-01-11 | 中国民航大学 | Bamboo truss string structure |
| CN103362213A (en) * | 2013-08-05 | 2013-10-23 | 东南大学 | Beam string structure |
| CN204804039U (en) * | 2015-06-29 | 2015-11-25 | 东南大学 | Add a string truss structure of reserve cable |
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2015
- 2015-06-29 CN CN201510367827.0A patent/CN104947793A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1709434A1 (en) * | 1966-07-08 | 1974-04-18 | Franz Brell | MULTI-PURPOSE HALL |
| CN2799724Y (en) * | 2004-11-01 | 2006-07-26 | 贵州大学 | Short backing-bar type truss string structure |
| CN201347586Y (en) * | 2008-12-17 | 2009-11-18 | 广州市设计院 | Large-span prestressed cable-supported truss structure |
| CN202108115U (en) * | 2011-06-03 | 2012-01-11 | 中国民航大学 | Bamboo truss string structure |
| CN103362213A (en) * | 2013-08-05 | 2013-10-23 | 东南大学 | Beam string structure |
| CN204804039U (en) * | 2015-06-29 | 2015-11-25 | 东南大学 | Add a string truss structure of reserve cable |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105234217A (en) * | 2015-11-05 | 2016-01-13 | 江苏理工学院 | Upper pressure roller supporting truss for ultra-wide plate bending machine |
| CN106836497A (en) * | 2016-12-22 | 2017-06-13 | 浙江精工钢结构集团有限公司 | A kind of pair of rope separate type truss string structure and its construction method |
| CN113431191A (en) * | 2021-07-20 | 2021-09-24 | 福州大学 | Four-side annular cable supported dome structure for preventing cable from continuously collapsing due to failure |
| CN114837483A (en) * | 2022-04-29 | 2022-08-02 | 北京建工集团有限责任公司 | High-low span portal steel frame building structure and construction process thereof |
| CN114837483B (en) * | 2022-04-29 | 2023-04-28 | 北京建工集团有限责任公司 | High-low span portal steel frame building structure and construction process thereof |
| CN115897805A (en) * | 2022-11-30 | 2023-04-04 | 中南建筑设计院股份有限公司 | Linear cross truss string space structure |
| CN116180979A (en) * | 2023-02-22 | 2023-05-30 | 中国十七冶集团有限公司 | Combined truss of large-span special-shaped assembled pc component based on BIM technology |
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