CN105672577A - New pre-stress bamboo and wood beam end anchorage device - Google Patents
New pre-stress bamboo and wood beam end anchorage device Download PDFInfo
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- CN105672577A CN105672577A CN201410663519.8A CN201410663519A CN105672577A CN 105672577 A CN105672577 A CN 105672577A CN 201410663519 A CN201410663519 A CN 201410663519A CN 105672577 A CN105672577 A CN 105672577A
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- wood
- bamboo
- anchorage device
- end anchorage
- steel plate
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Abstract
A new pre-stress bamboo and wood beam end anchorage device is suitable for pre-stress bamboo and wood beams in the field of civil engineering. The new pre-stress bamboo and wood beam end anchorage device solves the problem that the pre-stress bamboo and wood beams in the prior art can not completely pressed due to smaller cross-sectional dimensions. The new pre-stress bamboo and wood beam end anchorage device includes a steel plate groove in the shape of a Chinese character ri, a bolt, a steel cushion plate, a prestressed tendon, an anchor and the like. During specific construction, a wood beam is put in an upper groove of the anchorage device, and is fixed by the steel cushion plate and the bolt; by use of the pier-head anchor, the prestressed tendon passes through a reserved gap on the bottom of the steel plate groove, and the prestressed tendon is fixed on the lower part of the steel plate groove, so that the overall height is improved, neutral axis position can be lowered, and the beam whole body cross section compression effect can be achieved. During actual processing, according to the specific circumstances, by changes of the form of fixing of body of the beam and materials and shapes of the steel plate groove, the objects of being significant in effect, economic and safe can be achieved.
Description
Technical field
The present invention is applicable to the beam of the prestressing force bamboo and wood material of field of civil engineering.
Background technology
Frequently with the mode of pre-add external force before load-bearing in engineering, avoid the generation that crack in structure is too early, to reach to make full use of the effect of the strength of materials. For the beam of middle or small span, it is generally adopted the mode that screw thread twists and carries out pre-applied force, but still suffer from the shortcoming of uncontrollable stress limit positions. In order to solve problems, we adopt novel end anchorage device, strengthen whole height, make wooden frame and presstressed reinforcing steel mask work, by the increase of the arm of force, reduce the requirement for prestressing force size, make when prestressing force is less, it is possible to reach the state of beam body total cross-section pressurized.
Summary of the invention
For solving to reach total cross-section pressured state in the current girder pre-stressed applying of prestressing force bamboo and wood, the invention provides a kind of anchor, be used for solving the problems referred to above, the technical scheme adopted is as follows:
This device includes matrix steel plate groove, billet, screw rod, presstressed reinforcing steel, ground tackle etc. When Specific construction, wooden frame is placed in the upper grooves of anchor, and fixes its position by billet and bolt; By pier nose ground tackle, presstressed reinforcing steel is fixed in device bottom, improve whole height with this, reduce the position of natural axis, reach the effect of beam body total cross-section pressurized.
Patent of the present invention provides the benefit that:
1. easy to process, accessory is simple. Mate screw thread is twisted to open and can be completed stretching process, it is not necessary to unnecessary anchoring part.
2. regulation and control are convenient, and stress is reliable. When pre-applied force is little, it is possible to ensure beam total cross-section pressurized.
Accompanying drawing explanation
Fig. 1 is the prestressing force bamboo and wood beam end anchor schematic diagram optimized. A () is anchor and beam, presstressed reinforcing steel position relationship schematic diagram; B 1-1 section that () is this device; C 2-2 section that () is device; D () is device top view; E () is device 3-3 section. Digitized representation in each figure:
1: bamboo and wood material
2: steel
2-1: " day " shaped steel board slot
2-2: the billet of fixing beam body position, device end
2-3: the steel plate groove of reserving hole channel
3: bolt
4: ground tackle
5: presstressed reinforcing steel
Detailed description of the invention
First wooden frame (1) is packed into steel plate groove (2-1), and portion that billet (2-2) is placed on it, make wooden frame (1) fix by tightening upper bolt (3) with billet (2-2) generation top pressure;By presstressed reinforcing steel (5) through pier nose ground tackle (4), pier head machine is utilized to carry out the fixing reinforcing bar length of hydraulic pressure pier nose, the U-type groove (2-3) reserved by presstressed reinforcing steel (5) afterwards, it is determined that line style position through steel plate groove.
Embodiment: test group: prestressed timber beam is of a size of 3000X100X100, comparable group: pure glued wooden frame size 3000X100X100. Hierarchical loading is carried out, its bearing capacity result respectively 2.5kN m, 18kN m, it is considered to laminated wood glue and the knaur impact on pure wood component tension ability, the bending bearing capacity of prestressed timber beam is 6～7 times of pure wood component under equivalent environment.
Claims (4)
1. the present invention " the end anchorage device of novel pre-stressed bamboo and wood beam " is a kind of end anchorage device girder pre-stressed suitable in the bamboo and wood of field of civil engineering, it is characterized in that the position changing control natural axis by device height, strengthen the arm of force, reach the effect of beam body total cross-section pressurized.
2. according to claim 1 to " end anchorage device ", it is characterised in that: billet is positioned over beam top and is together inserted in steel plate groove, by tightening upper bolt, produces top pressure with billet and makes bamboo and wood beam fix; The U-type groove that presstressed reinforcing steel is reserved through bottom steel board slot, it is determined that line style position, and fix.
3. according to claim 1 to " novel ", it is characterised in that: change conventional anchor and depend on the form of scantling, the fixing bamboo and wood beam body of method by embedding and push up pressure; Realized the bearing distribution of beam total cross-section pressurized, presstressed reinforcing steel tension by end anchorage device, give full play to the mechanical property of bi-material.
4. " the bamboo and wood beam " according to claim 1,2,3, it is characterised in that: include the flexural member being made up of bamboo and wood, cemented bamboo, laminated wood, cemented bamboo wood composite etc. as material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410663519.8A CN105672577A (en) | 2014-11-19 | 2014-11-19 | New pre-stress bamboo and wood beam end anchorage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410663519.8A CN105672577A (en) | 2014-11-19 | 2014-11-19 | New pre-stress bamboo and wood beam end anchorage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105672577A true CN105672577A (en) | 2016-06-15 |
Family
ID=56945331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410663519.8A Pending CN105672577A (en) | 2014-11-19 | 2014-11-19 | New pre-stress bamboo and wood beam end anchorage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105672577A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029831A (en) * | 2019-05-20 | 2019-07-19 | 南京林业大学 | A kind of method of prestressing force enhancing bamboo and wood flexural member |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1557330A1 (en) * | 1987-01-07 | 1990-04-15 | Всесоюзный научно-исследовательский и проектно-конструкторский угольный институт "КузНИУИ" | Shield for mining thick steep beds |
| CN202645019U (en) * | 2011-12-13 | 2013-01-02 | 东北林业大学 | Pre-stress force bamboo and wood beam |
| CN103161318A (en) * | 2011-12-13 | 2013-06-19 | 东北林业大学 | Screw thread twist-stretch transverse stretch-draw prestress exerting system of adjustable and controllable bamboo and wooden beam |
-
2014
- 2014-11-19 CN CN201410663519.8A patent/CN105672577A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1557330A1 (en) * | 1987-01-07 | 1990-04-15 | Всесоюзный научно-исследовательский и проектно-конструкторский угольный институт "КузНИУИ" | Shield for mining thick steep beds |
| CN202645019U (en) * | 2011-12-13 | 2013-01-02 | 东北林业大学 | Pre-stress force bamboo and wood beam |
| CN103161318A (en) * | 2011-12-13 | 2013-06-19 | 东北林业大学 | Screw thread twist-stretch transverse stretch-draw prestress exerting system of adjustable and controllable bamboo and wooden beam |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029831A (en) * | 2019-05-20 | 2019-07-19 | 南京林业大学 | A kind of method of prestressing force enhancing bamboo and wood flexural member |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160615 |