CN104032833A - External pre-stressing exerting structure of three-dimensional truss - Google Patents
External pre-stressing exerting structure of three-dimensional truss Download PDFInfo
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- CN104032833A CN104032833A CN201410219881.6A CN201410219881A CN104032833A CN 104032833 A CN104032833 A CN 104032833A CN 201410219881 A CN201410219881 A CN 201410219881A CN 104032833 A CN104032833 A CN 104032833A
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- drag
- space truss
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- space
- stressing
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Abstract
The invention discloses an external pre-stressing exerting structure of a three-dimensional truss. Supporting rods are arranged in space of the three-dimensional truss to support a pre-stressing dragline to enable the dragline to be in a quadratic parabola shape, pre-stressing is exerted on the three-dimensional truss through the dragline in the quadratic parabola shape, upward lifting force is better provided for the three-dimensional truss, deflection deformation of the structure is accordingly and effectively controlled, the large span of the three-dimensional truss is achieved, and design requirements are met. The external pre-stressing exerting structure is a pre-stressing exerting mode which is novel, safe and more effective, and is suitable for large-span steel structures such as the three-dimensional truss.
Description
Technical field
The invention belongs to design and the building technology field of large-span prestressed steel structure, relate to a kind of space truss external prestressing and apply structure.
Background technology
At present, prestressing technique, because of its significant structural advantage, has been widely applied to the every field of structure.The large span that prestressing technique can implementation structure, the control of deflection deformation and system merrily and lightheartedly attractive in appearance.For space truss structure, conventionally adopt prestressing with bond tension technology, in truss lower chord, prestressed cable is set, but for the space truss structure of plane that there is no radian, prestressed cable in lower chord is very little to the upwards lifting force of structure generation, so kind method for applying prestressing force is unsatisfactory to the control effect of structural deflection.
Summary of the invention
In order to realize the large span of space truss, and the energy deflection deformation of control structure preferably, the present invention adopts a kind of novel prestress application technical method, it is external prestressing tension technology method, the method is compared to prestressing with bond method for stretching, better reduce the vertical deformation of space truss, more desirable to the effect of structural deflection control.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of space truss external prestressing applies structure, it is characterized in that, in space truss space, strut is set, support prestressed cable, make drag-line form second-degree parabola shape, drag-line by second-degree parabola shape applies prestressing force to space truss, thus the deflection deformation of more effective control structure.
Space truss comprises many web members that connect between lower chord, upper chord and a lower chord of two parallel upper chords of top, below.
In the space that upper chord, lower chord and web member form, along truss length direction, drag-line is set, the two ends of drag-line are connected on two reinforcement web members between upper chord end.
The strut being connected is set between the web member between space truss upper chord and drag-line.
Strut one end is connected on two web members between upper chord, and the other end is connected on drag-line, supports and has applied prestressed drag-line, and strut quantity and position arrange according to making drag-line form second-degree parabola shape.
Described strut is round steel pipe.
Based on prestressing technique, round steel pipe strut is set in space truss space, support the prestressed cable of second-degree parabola shape, now prestressed cable has certain radian, thereby better provides lifting force upwards to space truss, the deflection deformation of control structure.
The present invention compared with prior art, has the following advantages:
(1) span of increase space truss;
(2) more effectively control the deflection deformation of space truss;
(3) contactless with agent structure, without prestressing force friction loss;
(4) applicability is strong, also can analogy for the prestress application of other forms of large-span steel;
(5), in structural element altitude range, do not affect building clear height;
(6) easy construction;
(7) meet code requirement, safe and reliable.
Brief description of the drawings
Fig. 1 is axonometric drawing of the present invention;
Fig. 2 is plan view of the present invention;
Fig. 3 is phantom drawing of the present invention;
Fig. 4 is elevation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
As Figure 1-Figure 4, space truss comprises the many web members 3 that connect between a lower chord 2, upper chord 1 and the lower chord 2 of two parallel upper chords 1 of top, below to structure of the present invention, and space truss longitudinal section forms del.In the space that upper chord 1, lower chord 3 and web member 3 form, along truss length direction, drag-line 4 is set, the two ends of drag-line 4 are connected to and approach on two reinforcement web members between upper chord end.
Based on prestressing technique, the web member between space truss upper chord 1 arranges downward round steel pipe for 31 times as strut 5.Strut 5 one end are connected on two web members 31 between upper chord, and the other end is connected on drag-line 4, have applied prestressed drag-line thereby support, and strut 5 positions according to second-degree parabola with the particular location of drag-line 4 in space truss space.Now prestressed cable has certain radian, therefore can better provide lifting force upwards to space truss with respect to prestressing with bond method for stretching, thus the deflection deformation of control structure more effectively.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and distortion, these improvement and distortion also should be considered as protection scope of the present invention.
Claims (6)
1. space truss external prestressing applies a structure, it is characterized in that, in space truss space, strut is set, and supports prestressed cable, makes drag-line form second-degree parabola shape, by the drag-line of second-degree parabola shape, space truss is applied to prestressing force.
2. space truss external prestressing according to claim 1 applies structure, it is characterized in that, space truss comprises many web members that connect between lower chord, upper chord and a lower chord of two parallel upper chords of top, below.
3. space truss external prestressing according to claim 2 applies structure, it is characterized in that, in the space that upper chord, lower chord and web member form, along truss length direction, drag-line is set, and the two ends of drag-line are connected on two web members between upper chord end.
4. apply structure according to the space truss external prestressing described in claim 2 or 3, it is characterized in that, the strut being connected is set between the web member between space truss upper chord and drag-line.
5. space truss external prestressing according to claim 4 applies structure, it is characterized in that, strut one end is connected on two web members between upper chord, the other end is connected on drag-line, support has applied prestressed drag-line, and strut quantity and position arrange according to making drag-line form second-degree parabola shape.
6. space truss external prestressing according to claim 1 applies structure, it is characterized in that, described strut is round steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410219881.6A CN104032833A (en) | 2014-05-23 | 2014-05-23 | External pre-stressing exerting structure of three-dimensional truss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410219881.6A CN104032833A (en) | 2014-05-23 | 2014-05-23 | External pre-stressing exerting structure of three-dimensional truss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104032833A true CN104032833A (en) | 2014-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410219881.6A Pending CN104032833A (en) | 2014-05-23 | 2014-05-23 | External pre-stressing exerting structure of three-dimensional truss |
Country Status (1)
| Country | Link |
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| CN (1) | CN104032833A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863307A (en) * | 2015-04-28 | 2015-08-26 | 成都迅德科技有限公司 | Truss structure |
| CN108867393A (en) * | 2018-08-02 | 2018-11-23 | 中铁二院工程集团有限责任公司 | A kind of long-span continuous rigid-framed bridge external prestressing load system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6436838A (en) * | 1987-07-31 | 1989-02-07 | Shimizu Construction Co Ltd | Constructure of truss structure |
| CN202108115U (en) * | 2011-06-03 | 2012-01-11 | 中国民航大学 | Bamboo truss string structure |
| CN102839785A (en) * | 2011-06-22 | 2012-12-26 | 张如成 | Truss with down-supported parabolic pre-stressed high-strength steel cable |
| CN202689340U (en) * | 2012-07-06 | 2013-01-23 | 苏州工业园区设计研究院股份有限公司 | Large-span arch truss structure |
| CN203834664U (en) * | 2014-05-23 | 2014-09-17 | 苏州工业园区设计研究院股份有限公司 | Spatial truss external pre-stress exerting structure |
-
2014
- 2014-05-23 CN CN201410219881.6A patent/CN104032833A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6436838A (en) * | 1987-07-31 | 1989-02-07 | Shimizu Construction Co Ltd | Constructure of truss structure |
| CN202108115U (en) * | 2011-06-03 | 2012-01-11 | 中国民航大学 | Bamboo truss string structure |
| CN102839785A (en) * | 2011-06-22 | 2012-12-26 | 张如成 | Truss with down-supported parabolic pre-stressed high-strength steel cable |
| CN202689340U (en) * | 2012-07-06 | 2013-01-23 | 苏州工业园区设计研究院股份有限公司 | Large-span arch truss structure |
| CN203834664U (en) * | 2014-05-23 | 2014-09-17 | 苏州工业园区设计研究院股份有限公司 | Spatial truss external pre-stress exerting structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863307A (en) * | 2015-04-28 | 2015-08-26 | 成都迅德科技有限公司 | Truss structure |
| CN108867393A (en) * | 2018-08-02 | 2018-11-23 | 中铁二院工程集团有限责任公司 | A kind of long-span continuous rigid-framed bridge external prestressing load system |
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Application publication date: 20140910 |