CN103993662A - Internal and external supporting rod type cable-arch structure - Google Patents
Internal and external supporting rod type cable-arch structure Download PDFInfo
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- CN103993662A CN103993662A CN201410110477.5A CN201410110477A CN103993662A CN 103993662 A CN103993662 A CN 103993662A CN 201410110477 A CN201410110477 A CN 201410110477A CN 103993662 A CN103993662 A CN 103993662A
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- line
- drag
- strut
- supporting rod
- downhaul
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Abstract
The invention discloses an internal and external supporting rod type cable-arch structure. The internal and external supporting rod type cable-arch structure comprises an upper chord beam. The upper chord beam is provided with a plurality of sets of chord inhaul cables. Each set of inhaul cables include an upper inhaul cable and a lower inhaul cable, wherein the upper inhaul cable and the lower inhaul cable are arranged on the upper side and the lower side of the upper chord beam and are respectively in a V type, an opening of the upper inhaul cable is downward, an opening of the lower inhaul cable is upward, the front free ends and the rear free ends of the upper inhaul cable and the lower inhaul cable are hinged to the upper chord beam, the hinge points on the same side coincide, an upper supporting rod is downwards arranged from the folding point of the upper inhaul cable and located between the folding point and the upper chord beam, a lower supporting rod is upwards arranged from the folding point of the lower inhaul cable and located between the folding point and the upper chord beam, and the upper supporting rod and the lower supporting are hinged to the same point on the upper chord beam. A front hinge point of a rear set of chord inhaul cables coincides with the hinge point of a front set of supporting rods. A rear hinge point of a front set of chord inhaul cables coincides with the hinge point of a rear set of supporting rods. After a certain upper inhaul cable or lower inhaul cable loses efficacy, the whole structure will not immediately lose efficacy, collapse resistance is improved, the height of the whole section increases, and the bearing capacity is largely improved.
Description
Technical field
The present invention relates to a kind of rope arch structure, particularly a kind of inside and outside Jackstay type rope arch structure.
Background technology
The application of field of civil engineering large-span steel is more and more at present.But sharply strengthen along with span increases deadweight, structure faces the contradiction that uses function, design rationality and economic indicator mutually to restrict.The rigidity that reduces dead load simultaneously and improve structure in order to meet the use function of structure, the prestressing force beam string structure of being furnished with drag-line is more and more applied in large-span steel.By the layout of prestressed cable and strut, the bearing capacity of large-span steel and rigidity have had very large improvement.
As shown in Figure 1, existing string beam, comprises wind up beam 1(or arch or the truss that are positioned at same plane to existing rope arch structure), strut 3 and lower edge drag-line 2, described in the wind up two ends of beam 1 be fixedly connected with the two ends of lower edge drag-line 2 respectively; Described strut 3 vertically arranges, its upper end is hinged with the beam 1 that winds up, and lower end is fixedly connected with lower edge drag-line 2 by cord clip tool 4; Lower edge drag-line 2 after stretch-draw forms the broken line of axial symmery shape, and the beam 1 that winds up, strut 3 and lower edge drag-line 2 form self equilibrium systems, lower edge drag-line 2 tensions, and strut 3 is pressurized two power bars, the beam 1 that winds up is for bending component.
In said structure, the prestressing force of lower edge drag-line 2 makes structure generation allowance for camber, therefore the final amount of deflection of structure under load action can reduce, and by the stretching force of lower edge drag-line 2, make strut 3 produce component upwards, the beam 1 that causes winding up produces and internal force and distortion contrary under external load effect, to form whole tension string beam structure and to improve the rigidity of structure, strut 3 provides resiliency supported to Moment resistant Element, improves the latter's stress performance; If when bending component is taken as arch, born the horizontal thrust of arch by lower edge drag-line 2, alleviate the burden that arch produces bearing, therefore should take necessary temporary transient or permanent construction measure at bearing place, under top stress and external load effect, (refer under the roofing load actions such as deadweight) form self equilibrium systems, do not produce horizontal thrust; Meanwhile, the existence of lower edge drag-line 2 can reduce greatly the to wind up cross section of beam 1, improves the supporting capacity of total.At this moment, if in use there is destroying fracture in lower edge drag-line 2, can not provide horizontal pull for arch stand, bearing may move to both sides, and after lower edge drag-line 2 lost efficacy, near the effect of the strut 3 its breakaway poing was lost efficacy, and only depending on the beam 1 that winds up to bear external load may be because Lack of support ruptures, and whole string beam also can lose efficacy thereupon.
As shown in Figure 2, get any one and depart from the strut 3 of angular bisector at its broken line angle, place and the tie point of drag-line 2 as standing balance research object, tie point is subject to the left and right end pulling force P1 of drag-line 2 and the effect of P2 and the support force P3 of strut 3 to tie point, according to parallelogram law, form balanced system of force, due to angle α and angle β unequal, therefore can know that according to geometric knowledge P1 is not equal to P2, therefore frictional force F=P1-P2 ≠ 0 to drag-line 2 at the tie point place cord clip tool 4 of strut 3 and drag-line 2.Obviously,, if drag-line 2 keeps balance at cord clip tool 4 places, cord clip tool 4 is necessary to the frictional force F of drag-line 2; On the contrary, if cord clip tool 4 can not provide enough frictional force to drag-line 2, it is relatively static that drag-line 2 just can not keep with it, strut 3 just can not keep balance in other words, will slide to the little direction of drag-line 2 pulling force, cause drag-line 2 lax, until the pulling force difference of the drag-line 2 of cord clip tool 4 both sides equates with the frictional force that cord clip tool 4 offers drag-line 2.
Due to generally, there is one or more layers PE overcoat in drag-line 2 surfaces, this overcoat is chemically unstables with respect to steel, even if the frictional force while therefore construction between cord clip tool 4 and drag-line 2 is enough large, also be merely able to make within a certain period of time strut 3 to keep vertically, even if done even at that time frictional force test, reach requirement, due to the chemical instability of PE, can there is very soon chemical change (as chemical breakdown, aging), cause drag-line 2 to become slack at strut 3 with the tie point place slippage of drag-line 2 thereby there is drag-line, and then produce structural safety hidden danger.
Summary of the invention
Technical problem to be solved by this invention is for the deficiencies in the prior art, provide a kind of reasonable in design, in use can avoid appearing at lower edge drag-line inefficacy whole the situation that string beam directly lost efficacy afterwards, also avoid in use occurring that drag-line is lax, and can increase the inside and outside Jackstay type rope arch structure of structural section height and bearing capacity simultaneously.
Technical problem to be solved by this invention is to realize by following technical scheme, a kind of inside and outside Jackstay type rope arch structure, be characterized in: comprise the beam that winds up, on beam, be provided with along its length some groups of string drag-lines winding up, every group of string drag-line and wind up and be equipped with strut between beam, described string drag-line, strut all with wind up beam in same plane; Every group of described string drag-line comprises the upper drag-line and the downhaul that are located at the upper and lower both sides of the beam that winds up V-shaped setting, upper drag-line Open Side Down arrange, the opening upwards setting of downhaul, former and later two free ends of upper drag-line and downhaul respectively pin joint hinged with the beam that winds up and homonymy overlap; At the break of upper drag-line downwards and wind up and be provided with strut between beam, upper strut is located on the angular bisector of drag-line, and the upper end of upper strut joins by the break of cord clip tool and upper drag-line, and the lower end of upper strut is hinged on winds up on beam; At the break of downhaul upwards and wind up and between beam, be provided with lower supporting rod, lower supporting rod is located on the angular bisector of downhaul, the lower end of lower supporting rod joins by the break of cord clip tool and downhaul, the upper end of lower supporting rod is hinged on winds up on beam, and upper strut and lower supporting rod are same point at the pin joint winding up on beam; Described in the setting that overlaps with the pin joint of upper strut, the lower supporting rod at last group of string drag-line and the beam that winds up of upper drag-line, the downhaul of rear one group of string drag-line and the front pin joint of the beam that winds up; Described in the setting that overlaps with the pin joint of upper strut, the lower supporting rod at rear one group of string drag-line and the beam that winds up of upper drag-line, the downhaul of last group of string drag-line and the rear pin joint of the beam that winds up.
Technical problem to be solved by this invention can also further realize by following technical scheme, and described inside and outside Jackstay type rope arch structure, is characterized in: described upper drag-line and downhaul are set to respectively one, and cord clip tool is located at V-type break place.
Technical problem to be solved by this invention can also further realize by following technical scheme, described inside and outside Jackstay type rope arch structure, be characterized in: described cord clip tool comprises upper and lower two clamping plates, between upper and lower two clamping plates, be provided with set bolt, be provided with the engaging lug coordinating with strut at the middle part of train wheel bridge.
Technical problem to be solved by this invention can also further realize by following technical scheme, described inside and outside Jackstay type rope arch structure, be characterized in: described upper drag-line and downhaul are made up of two skew cables respectively, described cord clip tool is located at the V-type break place of two skew cables.
Technical problem to be solved by this invention can also further realize by following technical scheme, described inside and outside Jackstay type rope arch structure, be characterized in: described cord clip tool comprises the junction plate being located between two skew cables, the two ends of junction plate are respectively equipped with the connecting hole coordinating with suspension cable, are provided with the engaging lug coordinating with strut at the middle part of junction plate.
Compared with prior art, the long drag-line that tradition is opened string beam by the present invention removes, by some groups of string drag-lines for it, some groups of string drag-lines comprise drag-line, downhaul, upper strut and lower supporting rod, after on a certain, drag-line or downhaul lost efficacy, due to drag-line on all the other or downhaul and the annexation of winding up between beam and strut, total can not lost efficacy at once, improve the anti-fall performance of collapsing, can prevent Progressive Collapse, eliminated potential safety hazard.Simultaneously, the both sides internal force balance at the tie point place of upper drag-line or downhaul and upper strut or lower supporting rod, make not have frictional force between cord clip tool and upper drag-line or downhaul, thereby between cord clip tool and upper drag-line or downhaul, can there is not relative sliding, therefore can avoid drag-line or downhaul lax, eliminate safe hidden trouble, in addition, arranging of upper strut and lower supporting rod can make whole depth of section greatly increase, and bearing capacity also improves greatly.
Brief description of the drawings
Fig. 1 is the structural representation of prior art;
Fig. 2 is the tie point force analysis figure of arbitrary strut and short drag-line in Fig. 1;
Fig. 3 is a kind of structural representation of the present invention;
Fig. 4 is the tie point force analysis figure of arbitrary strut and short drag-line in Fig. 3;
Fig. 5 is a kind of structural representation of cord clip tool;
Fig. 6 is the another kind of structural representation of cord clip tool.
Detailed description of the invention
With reference to figure 3, a kind of inside and outside Jackstay type rope arch structure, comprise the beam 5 that winds up, the beam 5 that winds up can also be arch or truss, on beam 5, be provided with along its length some groups of string drag-lines winding up, every group of string drag-line and wind up and be equipped with strut between beam 5, described string drag-line, strut all with wind up beam 5 in same plane; Two groups of string drag-lines of outermost are hinged respectively at the two ends of the beam 5 that winds up.Every group of described string drag-line comprises the upper drag-line 10 and the downhaul 9 that are located at beam both sides the V-shaped setting Shang Xia 5 of winding up, upper drag-line 10 Open Side Down arrange, the opening upwards setting of downhaul 9, former and later two free ends of upper drag-line 10 and downhaul 9 overlap with the beam 5 that winds up pin joint hinged and homonymy respectively.Between beam 5, be provided with strut 6 with winding up downwards at the break of upper drag-line 10, upper strut 6 is located on the angular bisector of drag-line 10, and the upper end of upper strut 6 joins by the break of cord clip tool 8 and upper drag-line 10, and the lower end of upper strut 6 is hinged on winds up on beam 5; At the break of downhaul 9 upwards and wind up and between beam 5, be provided with lower supporting rod 7, lower supporting rod 7 is located on the angular bisector of downhaul 9, the lower end of lower supporting rod 7 joins by cord clip tool 8 and the break of downhaul 9, the upper end of lower supporting rod 7 is hinged on winds up on beam 5, and upper strut 6 is same point with lower supporting rod 7 at the pin joint winding up on beam 5; The setting that overlaps with the pin joint of upper strut 6, the lower supporting rod 7 at last group of string drag-line and the beam 5 that winds up with the front pin joint of the beam 5 that winds up of the described upper drag-line 10 at rear one group of string drag-line, downhaul 9; The setting that overlaps with the pin joint of upper strut 6, the lower supporting rod 7 at rear one group of string drag-line and the beam 5 that winds up with the rear pin joint of the beam 5 that winds up of the described upper drag-line 10 at last group of string drag-line, downhaul 9.
As shown in Figure 4, the tie point of getting the upper drag-line 10 of arbitrary group of string drag-line or downhaul 9 and coupled upper strut 6 or lower supporting rod 7 is as standing balance research object.The V-type break place of upper drag-line 10 or downhaul 9 is subject to left and right pulling force P1 and P2, be subject to support force P3 to tie point of strut 6 or lower supporting rod 7 and the effect of P4 simultaneously, form balanced system of force according to parallelogram law, because angle α is equal with angle β, therefore can know P1=P2, the internal force of going up a layback rope of drag-line 10 or downhaul 9 is a definite value substantially in its length, upper drag-line 10 or downhaul 9 are at the both sides internal force balance at the tie point place of upper strut 6 or lower supporting rod 7, strut 6 or lower supporting rod 7 are not relied on and upper drag-line 10 or downhaul 9 between frictional force and nature in balance between two forces state, upper strut 6 or lower supporting rod 7 can not slide with respect to upper drag-line 10 or downhaul 9, thereby avoid drag-line 10 or downhaul 9 lax.
Described upper drag-line 10 and downhaul 9 are set to respectively one, and cord clip tool 8 is located at V-type break place.As shown in Figure 5, now the structure of cord clip tool 8 is: described cord clip tool 8 comprises upper and lower two clamping plates 12,13, between upper and lower two clamping plates 12,13, is provided with set bolt, is provided with the engaging lug 11 coordinating with strut at the middle part of train wheel bridge 12.When installation, upper and lower two clamping plates 12,13 presss from both sides upper drag-line 10 or downhaul 9 therebetween, then with set bolt, upper and lower two clamping plates 12,13 is fixed tightly, and strut is bolted on the engaging lug 11 of cord clip tool 8 simultaneously.
Described upper drag-line 10 and downhaul 9 are made up of two skew cables respectively, and described cord clip tool 8 is located at the V-type break place of two skew cables.As shown in Figure 6, now the structure of cord clip tool 8 is: described cord clip tool 8 comprises the junction plate 14 being located between two skew cables, the two ends of junction plate 14 are respectively equipped with the connecting hole coordinating with suspension cable, are provided with the engaging lug 11 coordinating with strut at the middle part of junction plate 14.When installation, two bottoms of two skew cables of upper drag-line 10 or downhaul 9 are bolted on respectively in the connecting hole at junction plate 14 two ends, and the bottom of upper strut 6 or lower supporting rod 7 is fixed by bolts on the engaging lug 11 of cord clip tool 8, installs.
Implementation procedure: first wind up on beam 5 determine on position and the height of strut 6 and lower supporting rod 7, the direction of upper strut 6, lower supporting rod 7 is pointed to the center of circle of the circle at beam 5 places of winding up, and upper drag-line 10 and downhaul 9 is pulled in afterwards to the relevant position of the beam 5 that winds up.
When each upper drag-line 10 or downhaul 9 and upper strut 6 or lower supporting rod 7 are installed, cord clip tool 8 is firmly fixed on to the break position of each upper drag-line 10 or downhaul 9.After applying by the work progress such as stretch-draw, installation and various load, upper strut 6 is just in lower supporting rod 7 and each upper drag-line 10 or downhaul 9 state (position of all members is all identical with each member position of the string beam under prior art) that design is expected.On the basis of this processing mode, adopt an effective measure and increase the friction factor between each upper drag-line 10 or downhaul 9 and cord clip tool 8 as far as possible, as safety stock, so that the each upper drag-line 10 in a string beam or downhaul 9 are all the time in stable state.
The above 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, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. Jackstay type rope arch structure inside and outside a kind, it is characterized in that: comprise the beam that winds up, on beam, be provided with along its length some groups of string drag-lines winding up, every group of string drag-line and wind up and be equipped with strut between beam, described string drag-line, strut all with wind up beam in same plane; Every group of described string drag-line comprises the upper drag-line and the downhaul that are located at the upper and lower both sides of the beam that winds up V-shaped setting, upper drag-line Open Side Down arrange, the opening upwards setting of downhaul, former and later two free ends of upper drag-line and downhaul respectively pin joint hinged with the beam that winds up and homonymy overlap; At the break of upper drag-line downwards and wind up and be provided with strut between beam, upper strut is located on the angular bisector of drag-line, and the upper end of upper strut joins by the break of cord clip tool and upper drag-line, and the lower end of upper strut is hinged on winds up on beam; At the break of downhaul upwards and wind up and between beam, be provided with lower supporting rod, lower supporting rod is located on the angular bisector of downhaul, the lower end of lower supporting rod joins by the break of cord clip tool and downhaul, the upper end of lower supporting rod is hinged on winds up on beam, and upper strut and lower supporting rod are same point at the pin joint winding up on beam; Described in the setting that overlaps with the pin joint of upper strut, the lower supporting rod at last group of string drag-line and the beam that winds up of upper drag-line, the downhaul of rear one group of string drag-line and the front pin joint of the beam that winds up; Described in the setting that overlaps with the pin joint of upper strut, the lower supporting rod at rear one group of string drag-line and the beam that winds up of upper drag-line, the downhaul of last group of string drag-line and the rear pin joint of the beam that winds up.
2. inside and outside Jackstay type rope arch structure according to claim 1, is characterized in that: described upper drag-line and downhaul are set to respectively one, and cord clip tool is located at V-type break place.
3. inside and outside Jackstay type rope arch structure according to claim 2, is characterized in that: described cord clip tool comprises upper and lower two clamping plates, between upper and lower two clamping plates, is provided with set bolt, is provided with the engaging lug coordinating with strut at the middle part of train wheel bridge.
4. inside and outside Jackstay type rope arch structure according to claim 1, is characterized in that: described upper drag-line and downhaul are made up of two skew cables respectively, and described cord clip tool is located at the V-type break place of two skew cables.
5. inside and outside Jackstay type rope arch structure according to claim 4, it is characterized in that: described cord clip tool comprises the junction plate being located between two skew cables, the two ends of junction plate are respectively equipped with the connecting hole coordinating with suspension cable, are provided with the engaging lug coordinating with strut at the middle part of junction plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410110477.5A CN103993662A (en) | 2014-03-24 | 2014-03-24 | Internal and external supporting rod type cable-arch structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410110477.5A CN103993662A (en) | 2014-03-24 | 2014-03-24 | Internal and external supporting rod type cable-arch structure |
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| Publication Number | Publication Date |
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| CN103993662A true CN103993662A (en) | 2014-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410110477.5A Pending CN103993662A (en) | 2014-03-24 | 2014-03-24 | Internal and external supporting rod type cable-arch structure |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT387059B (en) * | 1987-07-08 | 1988-11-25 | Frantl Conprojekt | SINGLE-LAYER, POLYGONALLY CURVED ROD STRUCTURE |
| JPH09158387A (en) * | 1995-12-06 | 1997-06-17 | Taisei Corp | Roof frame |
| CN201236414Y (en) * | 2008-06-24 | 2009-05-13 | 浙江省二建建设集团有限公司 | Shuttle shaped beam string girder structure |
| JP4552129B2 (en) * | 2005-02-01 | 2010-09-29 | 清水建設株式会社 | Tense grid structure |
| CN203113521U (en) * | 2013-02-07 | 2013-08-07 | 杭州恒达钢构股份有限公司 | Beam string cable rod node |
| CN203174851U (en) * | 2013-03-21 | 2013-09-04 | 杭州恒达钢构股份有限公司 | Connecting mechanism for limiting lower string cable of string beam |
| CN103397740A (en) * | 2013-08-05 | 2013-11-20 | 东南大学 | Three-dimensional beam string structure |
-
2014
- 2014-03-24 CN CN201410110477.5A patent/CN103993662A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT387059B (en) * | 1987-07-08 | 1988-11-25 | Frantl Conprojekt | SINGLE-LAYER, POLYGONALLY CURVED ROD STRUCTURE |
| JPH09158387A (en) * | 1995-12-06 | 1997-06-17 | Taisei Corp | Roof frame |
| JP4552129B2 (en) * | 2005-02-01 | 2010-09-29 | 清水建設株式会社 | Tense grid structure |
| CN201236414Y (en) * | 2008-06-24 | 2009-05-13 | 浙江省二建建设集团有限公司 | Shuttle shaped beam string girder structure |
| CN203113521U (en) * | 2013-02-07 | 2013-08-07 | 杭州恒达钢构股份有限公司 | Beam string cable rod node |
| CN203174851U (en) * | 2013-03-21 | 2013-09-04 | 杭州恒达钢构股份有限公司 | Connecting mechanism for limiting lower string cable of string beam |
| CN103397740A (en) * | 2013-08-05 | 2013-11-20 | 东南大学 | Three-dimensional beam string structure |
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Application publication date: 20140820 |
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