CN204590639U - A kind of novel bamboo and wood continuous beam prestress application system - Google Patents
A kind of novel bamboo and wood continuous beam prestress application system Download PDFInfo
- Publication number
- CN204590639U CN204590639U CN201420770002.4U CN201420770002U CN204590639U CN 204590639 U CN204590639 U CN 204590639U CN 201420770002 U CN201420770002 U CN 201420770002U CN 204590639 U CN204590639 U CN 204590639U
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- bamboo
- backing plate
- steering block
- wood
- steel backing
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Abstract
Novel bamboo and wood continuous beam prestress application system, is applicable to the prestressing force bamboo and wood beam of field of civil engineering.It solve current bamboo and wood beam because of mid-span deflection excessive, and the girder span caused is limited, the phenomenon of waste of material.The utility model bamboo and wood beam end places Double U-shaped steel backing plate, ground tackle embeds the end position fixing presstressed reinforcing steel outside Double U-shaped steel backing plate, bamboo and wood beam is provided with bottom steel backing plate and steering block, bottom steel backing plate is connected by screw rod with steering block, steering block offers arc groove, and arc groove fixes the position of presstressed reinforcing steel.When Specific construction, ensure that beam body both sides are close to by reinforcing bar, by rotary screw, steering block is moved up and down, thus drive the presstressed reinforcing steel that is connected with steering block and beam to produce horizontal relative displacement to control Shi Hanzhang.In actual processing, can increase intermediate support as the case may be, change the profile of steering block, be effective object that is remarkable, economic security.
Description
Technical field
The utility model is applicable to the continuous beam of the prestressing force bamboo and wood material of field of civil engineering.
Background technology
In Practical Project, when prestressed simple beam exceedes certain value across footpath, under load action, mid span moment value will increase sharply, and affects the normal use of beam, causes the sectional dimension of beam and deadweight significantly to increase.In order to reduce consumptive material, convenient construction, this patent proposes prestressed continuous beam, by the existence of fulcrum place hogging moment, reduces mid-span deflection, changes moment of flexure line style, and its internal force is distributed than more reasonable with span simply supported beam.The arrangement of the presstressed reinforcing steel that this system adopts is external cloth muscle, and this external tendon does not slacken girder section, does not need reserving hole channel, easy construction, rapidly, is convenient to change, and very easily promotes.
Summary of the invention
For solving the increase of current prestressing force bamboo and wood beam with span, the phenomenons such as mid span moment is larger, the utility model provides a kind of prestress application system, and for solving the problem, the technical scheme adopted is as follows:
This system comprises Double U-shaped steel backing plate, bottom steel backing plate, groove arc steering block, screw rod, presstressed reinforcing steel, ground tackle etc.When Specific construction, multiple intermediate support can be set according to actual conditions, by presstressed reinforcing steel in beam end anchoring, and fix presstressed reinforcing steel position by the groove arc steering block be arranged on beam, ensure line style, by rotary screw, steering block is moved up and down, thus drive the presstressed reinforcing steel that is connected with steering block and beam to produce horizontal relative displacement to control Shi Hanzhang.
A kind of novel bamboo and wood continuous beam prestress application system, comprise Double U-shaped steel backing plate, bottom steel backing plate, groove arc steering block, screw rod, presstressed reinforcing steel and ground tackle, bamboo and wood beam end places Double U-shaped steel backing plate, ground tackle embeds the end position fixing presstressed reinforcing steel outside Double U-shaped steel backing plate, bamboo and wood beam is provided with bottom steel backing plate and steering block, bottom steel backing plate is connected by screw rod with steering block, and steering block offers arc groove, and arc groove fixes the position of presstressed reinforcing steel.Described bamboo and wood beam is flexural member, and flexural member is the flexural member be made up as material of bamboo and wood, cemented bamboo, laminated wood or cemented bamboo wood composite.
The beneficial effect of the utility model patent is:
1. easy construction, accessory are simple.External prestressing tendon, can not weakened members without the need to reserving hole channel, reduces the appearance of concentrated stress.Steering block coordinates stubborn of screw thread can complete stretching process, without the need to unnecessary tensioning equipment.
2. regulation and control are convenient, reliably stressed.When pre-applied force is little, control line style by end billet and steering block, controlled the size of pre-applied force by the rotation of screw rod.
3. adopt continuous beam, maximal bending moment minimizing 60% ~ 85% more corresponding to the simply supported beam under the same terms; Mid-span deflection minimizing 94% ~ 97% more corresponding to simply supported beam.
Accompanying drawing explanation
Fig. 1 is continuous beam stretch-draw prestressing force application system schematic diagram; Fig. 2 is 1-1 section in Fig. 1; Fig. 3 is end anchorage device schematic diagram; Fig. 4 is tensioning equipment side view; Fig. 5 is 1-1 section in Fig. 4.Digitized representation in each figure: 1: bamboo and wood beam; 2-1: Double U-shaped steel backing plate; 2-2: bottom steel backing plate; 3: steering block; 4: screw rod; 5: ground tackle; 6: presstressed reinforcing steel.
Detailed description of the invention
First presstressed reinforcing steel 6 is passed ground tackle 5, utilize pier head machine to carry out hydraulic pressure pier nose and fix reinforcing bar length, place Double U-shaped steel backing plate 2-1 in bamboo and wood beam 1 end afterwards, then ground tackle 5 is embedded outside Double U-shaped steel backing plate 2-1, the end position of fixing presstressed reinforcing steel 6; Bottom steel backing plate 2-2 and steering block 3 are placed on bamboo and wood beam 1 assigned address, control presstressed reinforcing steel 6 line style by the groove of steering block 3, rotated by bolt 4, make steering block 3 drive presstressed reinforcing steel 6 to move up and down, with this Shi Hanzhang.
Embodiment: test group: prestressed continuous beam is of a size of 6000X100X100, comparative group: prestressed simple beam size 6000X100X100.Carry out under equivalent environment loading (2 loading F=10kN, multistage loadings; The modulus of elasticity of timber is 10000Nmm), its internal force and deformation result as follows:
Simply supported beam: because amount of deflection has reached maximum restriction, cannot continue to load, added Maximum bending moment is 0.5kNm continuous beam: Maximum bending moment 4.68kNm, and span centre maximum defluxion is 29mm.
Can obtain thus, when taking amount of deflection as major control factors, continuous beam, compared to simply supported beam, embodies extremely great advantage.
Claims (2)
1. a Novel bamboo, wood continuous beam prestress application system, comprise Double U-shaped steel backing plate (2-1), bottom steel backing plate (2-2), steering block (3), screw rod (4), presstressed reinforcing steel (6) and ground tackle (5), it is characterized in that: bamboo, Double U-shaped steel backing plate (2-1) is placed in wooden frame (1) end, ground tackle (5) embeds the end position of the fixing presstressed reinforcing steel (6) in Double U-shaped steel backing plate (2-1) outside, bamboo, wooden frame (1) is provided with bottom steel backing plate (2-2) and steering block (3), bottom steel backing plate (2-2) is connected by screw rod (4) with steering block (3), (3) offer arc groove to steering block, arc groove fixes the position of presstressed reinforcing steel (6).
2. one according to claim 1 novel bamboo and wood continuous beam prestress application system, it is characterized in that: described bamboo and wood beam (1) is flexural member, flexural member is the flexural member be made up as material of bamboo and wood, cemented bamboo, laminated wood or cemented bamboo wood composite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420770002.4U CN204590639U (en) | 2014-12-09 | 2014-12-09 | A kind of novel bamboo and wood continuous beam prestress application system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420770002.4U CN204590639U (en) | 2014-12-09 | 2014-12-09 | A kind of novel bamboo and wood continuous beam prestress application system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204590639U true CN204590639U (en) | 2015-08-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420770002.4U Expired - Fee Related CN204590639U (en) | 2014-12-09 | 2014-12-09 | A kind of novel bamboo and wood continuous beam prestress application system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204590639U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958315A (en) * | 2017-05-17 | 2017-07-18 | 东北林业大学 | A kind of double limb controllable prestressing force beam string structures of large span |
| CN107268891A (en) * | 2017-06-26 | 2017-10-20 | 东北林业大学 | A kind of controllable prestressing force laminated wood string continuous beam |
-
2014
- 2014-12-09 CN CN201420770002.4U patent/CN204590639U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958315A (en) * | 2017-05-17 | 2017-07-18 | 东北林业大学 | A kind of double limb controllable prestressing force beam string structures of large span |
| CN107268891A (en) * | 2017-06-26 | 2017-10-20 | 东北林业大学 | A kind of controllable prestressing force laminated wood string continuous beam |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20161209 |