CN103397740B - Three-dimensional beam string structure - Google Patents
Three-dimensional beam string structure Download PDFInfo
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- CN103397740B CN103397740B CN201310337417.2A CN201310337417A CN103397740B CN 103397740 B CN103397740 B CN 103397740B CN 201310337417 A CN201310337417 A CN 201310337417A CN 103397740 B CN103397740 B CN 103397740B
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Abstract
The invention discloses a three-dimensional beam string structure. Two adjacent surface structures located at different beam string structures are a surface P and a surface N. Multiple inclined cables are arranged between the surface P and the surface N. The inclined cables are inclinedly arranged relatively to purlines. One end of each one of the inclined cables is hinged to an upper beam of the surface P and the other end of the inclined cable is fixedly connected to a lower end of a support rod of the surface N. Compared with the prior art, the three-dimensional beam string structure improves an inclined cable utilization rate. After the purlines lose efficacy, through connection between the inclined cable and a beam string structure adjacent to the inclined cable, the integrality of the three-dimensional beam string structure does not disappear immediately; collapse resistance is improved; continuous collapse is prevented; potential safety hazard is eliminated; and the structural integrality is greatly improved. The inclined cables can effectively solve the problem that out-of-plane unstability is produced after efficacy losing of inhaul cables at a side of a bottom chord of the existing beam string structure.
Description
Technical field
The present invention relates to a kind of Spatial Beam String Structure, belong to a kind of building structure.
Background technology
The application of current field of civil engineering large-span steel gets more and more.But sharply strengthen along with span increases deadweight, structure faces the contradiction that using function, design rationality and economic indicator restrict mutually.In order to the using function meeting structure reduces the rigidity that dead load improves structure simultaneously, the prestressing force beam string structure 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 Spatial beam string structure, comprise tension string beam structure and the purlin 5 of some Pin parallel interval layout, as shown in Figure 2, every Pin tension string beam structure comprises the beam 1 of winding up for a pair (or arch or truss), some to strut 3 and a pair lower edge drag-line 2, the described beam 1 that winds up, paired strut 3 and paired lower edge drag-line 2 is in pairs arranged symmetrically in the both sides of this plane of symmetry relative to a plane of symmetry, be positioned at the beam 1 that winds up of this plane of symmetry the same side, strut 3 and lower edge drag-line 2 and form a face structure; In same structure, the two ends of lower edge drag-line 2 are fixed with the two ends of the beam 1 that winds up respectively, and the upper end of described strut 3 is hinged with the beam 1 that winds up, and the lower end of strut 3 is fixedly connected with lower edge drag-line 2; The lower end being arranged in two paired struts 3 of two face structures is fixedly connected with two lower edge drag-lines 2 respectively by a two cord clip tool 4; Described purlin 5 is along tension string beam structure arragement direction layout and perpendicular to the described plane of symmetry, the two ends of purlin 5 are hinged with the two Pin tension string beam structures being positioned at two ends respectively; 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 tension, and strut 3 is pressurized two power bar, and the beam 1 that winds up is for bending component.
In said structure, the prestressing force of lower edge drag-line 2 makes tension string beam structure produce allowance for camber, therefore the final amount of deflection of tension string beam 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 the internal forces distribution contrary with under external load effect, to form whole tension string beam structure and to improve the rigidity of structure, strut 3 pairs of Moment resistant Elements provide resiliency supported, improve the stress performance of the latter; If when bending component is taken as arch, the horizontal thrust of arch is born by lower edge drag-line 2, alleviate the burden that arch produces bearing, therefore necessary temporary transient or permanent construction measure should be taked at bearing place, under top stress and external load effect, (under referring to the roof load effects such as deadweight) formation self equilibrium systems, does not produce horizontal thrust; Meanwhile, the existence of lower edge drag-line 2 can reduce to wind up the cross section of beam 1 greatly, improves the supporting capacity of total.Each Pin tension string beam structure can be linked to be an entirety by the existence of purlin 5, strengthens the globality of tension string beam structure, meanwhile, reduces calculated length during single Pin tension string beam structure pressurized, can increase the span of whole tension string beam structure.At this moment, if purlin 5 in use occurs destroying fracture, then lose contact between each Pin tension string beam structure, single Pin tension string beam structure bears external load then may there is damage inactivation because of Lack of support, may occur continuous collapse.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of in use can avoiding and appears at the Spatial Beam String Structure causing the globality of total to be lost immediately after purlin lost efficacy.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
A kind of Spatial Beam String Structure, comprise tension string beam structure and the purlin of some Pin parallel interval layout, every Pin tension string beam structure comprises the beam that winds up for a pair, some to strut and a pair lower edge drag-line, the described beam that winds up, paired strut and paired lower edge drag-line is in pairs arranged symmetrically in the both sides of this plane of symmetry relative to a plane of symmetry, be positioned at the beam that winds up of this plane of symmetry the same side, strut and lower edge drag-line and form a face structure; In same structure, the two ends of lower edge drag-line are fixed with the two ends of the beam that winds up respectively, and the upper end of described strut is hinged with the beam that winds up, and the lower end of strut is fixedly connected with lower edge drag-line; The lower end being arranged in two paired struts of two face structures is fixedly connected with two lower edge drag-lines respectively by a two cord clip tool; Described purlin is along tension string beam structure arragement direction layout and perpendicular to the described plane of symmetry, the two ends of purlin are hinged with the two Pin tension string beam structures being positioned at two ends respectively; Remember that adjacent and two the face structures not being arranged in same Pin tension string beam structure are one group of corresponding P face and N face, some oblique cables are furnished with between described one group of P face and N face, described oblique cable is in tilted layout relative to purlin, and its one end is hinged with the beam that winds up in P face, the other end is fixedly connected with the strut lower end in N face.
This case is relative to prior art, add the use of oblique cable, after purlin lost efficacy, due to the annexation between oblique cable and adjacent tension string beam structure, the globality of total can not be disappeared at once, improve anti-fall performance of collapsing, can Progressive Collapse be prevented, eliminate safe hidden trouble, also greatly can strengthen the globality of structure simultaneously.In addition, the out-of-plane unstability of appearance after oblique cable effectively prevents existing tension string beam structure lower edge side drag-line to lose efficacy.
Preferably, the position that described oblique cable is hinged with the beam that winds up in P face comprises and only comprises in this P face position that the beam that winds up is fixedly connected with lower edge drag-line and wind up beam and the hinged position of strut.
More preferred, will wind up respectively beam and lower edge drag-line of strut is divided into n section, total n+1 node, remembers that the node winded up on beam is followed successively by: u
0, u
1..., u
n-1, u
n, the node write down on string drag-line is followed successively by: d
0, d
1, d
i..., d
n-1, d
n; In same structure, described node u
0with node d
0for same node, described node u
nwith node d
nfor same node; The oblique cable link position arranged between described one group of P face and N face is d
iu
i-1and d
iu
i+1, wherein i be 1,2 ..., n-1.。
More preferred, be positioned at all tension string beam structures beyond two ends, two face structures of every Pin tension string beam structure are simultaneously as P face or simultaneously as N face.
More preferred, the oblique cable lower end while of described pair of cord clip tool in Stationary liquid co-located.
Preferably, described lower edge drag-line forms the broken line of axial symmery shape, and adjacent fold line forms a broken line angle, and each turning point of broken line is positioned on same parabola.
Beneficial effect: Spatial Beam String Structure provided by the invention, relative to prior art, add the use of oblique cable, after purlin lost efficacy, due to the annexation between oblique cable and adjacent tension string beam structure, the globality of total can not be disappeared at once, improve anti-fall performance of collapsing, can Progressive Collapse be prevented, eliminate safe hidden trouble, also greatly can strengthen the globality of structure simultaneously; In addition, the out-of-plane unstability of appearance after oblique cable effectively prevents existing tension string beam structure lower edge side drag-line to lose efficacy.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art;
Fig. 2 is single Pin tension string beam structure schematic diagram;
Fig. 3 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
Be illustrated in figure 3 a kind of tension string beam structure schematic diagram based on inventive concept, comprise tension string beam structure and the purlin (5) of some Pin parallel interval layout, every Pin tension string beam structure comprises the beam (1) that winds up for a pair, some to strut (3) and a pair lower edge drag-line (2), the described beam that winds up (1) in pairs, paired strut (3) and paired lower edge drag-line (2) are arranged symmetrically in the both sides of this plane of symmetry relative to a plane of symmetry, be positioned at the beam that winds up (1) of this plane of symmetry the same side, strut (3) and lower edge drag-line (2) form a face structure, in same structure, the two ends of lower edge drag-line (2) are fixed with the two ends of the beam that winds up (1) respectively, the upper end of described strut (3) is hinged with the beam (1) that winds up, and the lower end of strut (3) is fixedly connected with lower edge drag-line (2), the lower end being arranged in two paired struts (3) of two face structures is fixedly connected with two lower edge drag-lines (2) respectively by a two cord clip tool (4), described purlin (5) is along tension string beam structure arragement direction layout and perpendicular to the described plane of symmetry, the two ends of purlin (5) are hinged with the two Pin tension string beam structures being positioned at two ends respectively, remember that adjacent and two the face structures not being arranged in same Pin tension string beam structure are one group of corresponding P face and N face, some oblique cables (6) are furnished with between described one group of P face and N face, described oblique cable (6) is in tilted layout relative to purlin (5), and its one end is hinged with the beam that winds up (1) in P face, the other end is fixedly connected with strut (3) lower end in N face.
To wind up respectively beam (1) and lower edge drag-line (2) of strut (3) is divided into n section, total n+1 node, remembers that the node winded up on beam (1) is followed successively by: u
0, u
1..., u
n-1, u
n, the node write down on string drag-line (2) is followed successively by: d
0, d
1, d
i..., d
n-1, d
n; In same structure, described node u
0with node d
0for same node, described node u
nwith node d
nfor same node; Oblique cable (6) link position arranged between described one group of P face and N face is d
iu
i-1and d
iu
i+1, wherein i be 1,2 ..., n-1.Meanwhile, be positioned at all tension string beam structures beyond two ends, two face structures of every Pin tension string beam structure are simultaneously as P face or simultaneously as N face.
Oblique cable (6) the lower end while of described pair of cord clip tool (4) in Stationary liquid co-located.
Described oblique cable (6) position hinged with the beam that winds up (1) in P face comprises and only comprises in this P face position that the beam (1) that winds up is fixedly connected with lower edge drag-line (2) and the beam (1) that the winds up position hinged with strut (3).
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 tension, and strut 3 is pressurized two power bar, and the beam 1 that winds up is for bending component; Lower edge drag-line 2 forms the broken line of axial symmery shape, and adjacent fold line forms a broken line angle, and each turning point of broken line is positioned on same parabola.
Implementation procedure: first utilize tension string beam structure operational phase lower edge drag-line 2 shape in computer simulation prior art, then oblique cable 6 is increased, at strut 3, lower edge drag-line 2, purlin 5, each oblique cable 6, the position of cord clip tool 4 calculates the internal force of lower edge drag-line 2 and each oblique cable 6 final (operational phase) when all constant, the change of internal force is compensated by the internal force change of cord clip tool 4.
When lower edge drag-line 2 and each oblique cable 6 and fixing strut 3 are installed, cord clip tool 4 is firmly fixed in lower edge drag-line 2 calibration position corresponding to each oblique cable 6.By the work progress such as stretch-draw, installation and various what after the application, strut 3 and lower edge drag-line 2 and each oblique cable 6 are just in the state (each member position of position all with the beam string under prior art of all components is identical) designing and expect.On the basis of this processing mode, adopt an effective measure and increase lower edge drag-line 2 and the friction factor between each oblique cable 6 and cord clip tool 4 as far as possible, as safety stock, be in stable state all the time to make the lower edge drag-line 2 in beam string and each oblique cable 6.
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 (6)
1. a Spatial Beam String Structure, comprise tension string beam structure and the purlin (5) of some Pin parallel interval layout, every Pin tension string beam structure comprises the beam (1) that winds up for a pair, some to strut (3) and a pair lower edge drag-line (2), the described beam that winds up (1), paired strut (3) and paired lower edge drag-line (2) is in pairs arranged symmetrically in the both sides of this plane of symmetry relative to a plane of symmetry, is positioned at the beam that winds up (1) of this plane of symmetry the same side, strut (3) and lower edge drag-line (2) and forms a face structure; In same structure, the two ends of lower edge drag-line (2) are fixed with the two ends of the beam that winds up (1) respectively, the upper end of described strut (3) is hinged with the beam (1) that winds up, and the lower end of strut (3) is fixedly connected with lower edge drag-line (2); The lower end being arranged in two paired struts (3) of two face structures is fixedly connected with two lower edge drag-lines (2) respectively by a two cord clip tool (4); Described purlin (5) is along tension string beam structure arragement direction layout and perpendicular to the described plane of symmetry, the two ends of purlin (5) are hinged with the two Pin tension string beam structures being positioned at two ends respectively; It is characterized in that: remember that adjacent and two the face structures not being arranged in same Pin tension string beam structure are one group of corresponding P face and N face, some oblique cables (6) are furnished with between described one group of P face and N face, described oblique cable (6) is in tilted layout relative to purlin (5), and its one end is hinged with the beam that winds up (1) in P face, the other end is fixedly connected with strut (3) lower end in N face.
2. Spatial Beam String Structure according to claim 1, is characterized in that: described oblique cable (6) position hinged with the beam that winds up (1) in P face comprises and only comprise in this P face position that the beam (1) that winds up is fixedly connected with lower edge drag-line (2) and the beam (1) that the winds up position hinged with strut (3).
3. Spatial Beam String Structure according to claim 1, it is characterized in that: will wind up respectively beam (1) and lower edge drag-line (2) of strut (3) is divided into n section, total n+1 node, the note node winded up on beam (1) is followed successively by: u
0, u
1..., u
n-1, u
n, the node write down on string drag-line (2) is followed successively by: d
0, d
1, d
i..., d
n-1, d
n; In same structure, described node u
0with node d
0for same node, described node u
nwith node d
nfor same node; Oblique cable (6) link position arranged between described one group of P face and N face is d
iu
i-1and d
iu
i+1, wherein i be 1,2 ..., n-1.
4. Spatial Beam String Structure according to claim 3, is characterized in that: be positioned at all tension string beam structures beyond two ends, and two face structures of every Pin tension string beam structure are simultaneously as P face or simultaneously as N face.
5. the Spatial Beam String Structure according to claim 1,2,3 or 4, is characterized in that: oblique cable (6) lower end while of described pair of cord clip tool (4) in Stationary liquid co-located.
6. Spatial Beam String Structure according to claim 1, is characterized in that: described lower edge drag-line (2) forms the broken line of axial symmery shape, and adjacent fold line forms a broken line angle, and each turning point of broken line is positioned on same parabola.
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|---|---|---|---|
| CN201310337417.2A CN103397740B (en) | 2013-08-05 | 2013-08-05 | Three-dimensional beam string structure |
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|---|---|---|---|
| CN201310337417.2A CN103397740B (en) | 2013-08-05 | 2013-08-05 | Three-dimensional beam string structure |
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| CN103397740B true CN103397740B (en) | 2015-07-08 |
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|---|---|---|---|---|
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