CN204804039U - Add a string truss structure of reserve cable - Google Patents
Add a string truss structure of reserve cable Download PDFInfo
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- CN204804039U CN204804039U CN201520455921.7U CN201520455921U CN204804039U CN 204804039 U CN204804039 U CN 204804039U CN 201520455921 U CN201520455921 U CN 201520455921U CN 204804039 U CN204804039 U CN 204804039U
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- truss
- subsequent use
- rope
- string
- upper portion
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Abstract
The utility model discloses an add a string truss structure of reserve cable comprises the reserve cable in upper portion truss, middle part vaulting pole, lower part cable, bearing structure and middle part. The upper portion truss is served as reasons the four -angle taper space of just putting that many upper cord members, last quarter member, diagonal bracing and horizontal web member form and is encircleed the truss, the both ends anchor of lower part cable is at upper portion truss tip, many vaulting poles are evenly arranged with the lower part cable is middle to the upper portion truss, and the vaulting pole top is connected with upper portion truss lower chord and lower part cable respectively with the bottom, the reserve all alone both ends in middle part are connected with upper portion truss lower chord and vaulting pole bottom respectively, bearing structure comprises fixed hinge support and slip hinged -support, supports the both ends of upper portion truss respectively. The utility model provides a pair of add a string truss structure of reserve cable tradition opens the improvement of string truss structure redundancy, the anti ability reinforcing of collapsing in succession. This structural style is simple, and the structure is convenient, easily realizes, is fit for using in actual engineering.
Description
Technical field
The utility model belongs to large-span prestressed space structures field, relates 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.
Utility model content
Technical problem: the utility model 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 utility model, 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 utility model, 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 utility model, 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 utility model 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 the structure that the utility model provides 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 that the utility model provides, and Fig. 1 b is the truss-string-structure shaft side figure setting up rope for subsequent use of the 1st kind of mode that the utility model provides;
Fig. 2 a is the truss-string-structure plan view setting up rope for subsequent use of the 2nd kind of mode that the utility model provides, and Fig. 2 b is the truss-string-structure shaft side figure setting up rope for subsequent use of the 2nd kind of mode that the utility model provides;
Fig. 3 a is the truss-string-structure plan view setting up rope for subsequent use of the 3rd kind of mode that the utility model provides, and Fig. 3 b is the truss-string-structure shaft side figure setting up rope for subsequent use of the 3rd kind of mode that the utility model provides;
Fig. 4 a is the truss-string-structure plan view setting up rope for subsequent use of the 4th kind of mode that the utility model provides, and Fig. 4 b is the truss-string-structure shaft side figure setting up rope for subsequent use of the 4th kind of mode that the utility model provides;
Fig. 5 is the time-history curves of the truss-string-structure setting up rope for subsequent use that provides of the utility model and traditional truss-string-structure structure span centre modal displacement before and after drag-line lost efficacy.
Fig. 6 is the time-history curves of the truss-string-structure setting up rope for subsequent use that provides of the utility model and 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 utility model 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 described the implementation method of setting up the truss-string-structure of rope for subsequent use that the utility model provides for example.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.
The utility model truss string structure, 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 the progressive collapse-resisting performance of setting up the truss-string-structure of rope for subsequent use that the utility model provides, the utility model people 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 collapses after drag-line lost efficacy, and the truss-string-structure setting up rope for subsequent use that the utility model provides is except scheme 4, does not all occur collapsing, and 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 preferred embodiment of the present utility model; be noted that for those skilled in the art; under the prerequisite not departing from the utility model principle; some improvement and equivalent replacement can also be made; these improve the utility model claim and are equal to the technical scheme after replacing, and all fall into protection domain of the present utility model.
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 |
|---|---|---|---|
| CN201520455921.7U CN204804039U (en) | 2015-06-29 | 2015-06-29 | Add a string truss structure of reserve cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520455921.7U CN204804039U (en) | 2015-06-29 | 2015-06-29 | Add a string truss structure of reserve cable |
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| CN204804039U true CN204804039U (en) | 2015-11-25 |
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| CN201520455921.7U Active CN204804039U (en) | 2015-06-29 | 2015-06-29 | Add a string truss structure of reserve cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104947793A (en) * | 2015-06-29 | 2015-09-30 | 东南大学 | Truss-string structure with additional standby cables |
| CN108677724A (en) * | 2018-05-30 | 2018-10-19 | 上海宝冶集团有限公司 | Horizontal component controls cable tension construction method at truss spring quantum and bearing |
-
2015
- 2015-06-29 CN CN201520455921.7U patent/CN204804039U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104947793A (en) * | 2015-06-29 | 2015-09-30 | 东南大学 | Truss-string structure with additional standby cables |
| CN108677724A (en) * | 2018-05-30 | 2018-10-19 | 上海宝冶集团有限公司 | Horizontal component controls cable tension construction method at truss spring quantum and bearing |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |