CN105735653A - Novel bamboo and wood continuous beam prestressing force exertion system - Google Patents
Novel bamboo and wood continuous beam prestressing force exertion system Download PDFInfo
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- CN105735653A CN105735653A CN201410747602.3A CN201410747602A CN105735653A CN 105735653 A CN105735653 A CN 105735653A CN 201410747602 A CN201410747602 A CN 201410747602A CN 105735653 A CN105735653 A CN 105735653A
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- wood
- bamboo
- steering block
- prestressing force
- continuous beam
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Abstract
The invention relates to a novel bamboo and wood continuous beam prestressing force exertion system, and belongs to a prestressing force bamboo and wood beam applicable to the field of civil engineering. The novel bamboo and wood continuous beam prestressing force exertion system solves the problems of beam span limitation and material waste due to excessive midspan deflection of the existing bamboo and wood beam, and comprises double U-shaped steel pad plates, a bottom steel pad plate, a groove arc-shaped steering block, a screw rod, prestressed steel bars, an anchoring tool and the like. In the concrete construction process, the prestressed steel bars are anchored at the bottom of a beam; the positions of the prestressed steel bars are fixed through the groove steering block arranged on the beam; the steel bars are enabled to be tightly attached to the two sides of a beam body; the steering block is enabled to vertically move by rotating the screw rod, so that the prestressed steel bars connected with the steering block are driven to generate transverse relative displacement with the beam so as to control the exertion of the prestressing force. In the practical processing process, a middle support seat can be added according to the concrete conditions; the appearance of the steering block is changed; and the goals of prominent effect, economy and safety are achieved.
Description
Technical field
The present invention 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 that the sectional dimension of beam and deadweight dramatically 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 so that it is internal force distribution is more reasonable than 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, be conveniently replaceable, very easily promote.
Summary of the invention
For solving the increase with span of the current prestressing force bamboo and wood beam, the phenomenons such as mid span moment is bigger, the invention provides a kind of prestress application system, be used for solving the problems referred to above, the technical scheme adopted is as follows:
This system includes 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 practical situation, presstressed reinforcing steel is anchored in beam end, and the fixing presstressed reinforcing steel position of groove arc steering block by being arranged on beam, ensure line style, steering block is made to move up and down by rotary screw, thus driving the presstressed reinforcing steel being connected with steering block and beam to produce laterally opposed displacement to control Shi Hanzhang.
Patent of the present invention provides the benefit that:
1. easy construction, accessory are simple.External prestressing tendon without reserving hole channel, will not weakened members, reduce concentrated stress appearance.Steering block coordinates stubborn of screw thread can complete stretching process, it is not necessary to unnecessary tensioning equipment.
2. regulation and control are convenient, and stress is reliable.When pre-applied force is little, control line style by end billet and steering block, by the size of the Spin Control pre-applied force of screw rod.
3. adopting continuous beam, maximal bending moment reduces 60%～85% accordingly than 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 bamboo and wood continuous beam prestress application system aggregation figure, and (a) is continuous beam stretch-draw prestressing force application system schematic diagram；B () is 1-1 section in (a)；C () is end anchorage device schematic diagram；D () is tensioning equipment side view；E () is 1-1 section in (d).Digitized representation in each figure:
1: bamboo and wood material
2: steel
2-1: the Double U-shaped steel backing plate of fixing beam body position, end
2-2: the steel plate groove of reserving hole channel
3: steering block
4: screw rod
5: ground tackle
6: presstressed reinforcing steel
Detailed description of the invention
First by presstressed reinforcing steel (6) traverse pier nose ground tackle (5), pier head machine is utilized to carry out the fixing reinforcing bar length of hydraulic pressure pier nose, Double U-shaped steel backing plate (2-1) is placed afterwards in wooden frame (1) end, pier nose ground tackle (5) is embedded billet (2-1) outside, the end position of fixing presstressed reinforcing steel (6) again；Billet (2-2) and steering block (3) are placed on wooden frame (1) and specify position, presstressed reinforcing steel (6) line style is controlled by the groove of steering block (3), rotated by bolt (4), steering block (3) is made to drive reinforcing bar (6) to move up and down, with this Shi Hanzhang.
Embodiment: test group: prestressed continuous beam is of a size of 6000X100X100, comparable group: prestressed simple beam size 6000X100X100.Carry out under equivalent environment loading (2 loading F=10kN, multistage loadings；The elastic modelling quantity of timber is 10000N mm), its internal force and deformation result are as follows:
Simply supported beam: reached maximum restriction because of amount of deflection, it is impossible to continuing to load, added Maximum bending moment is 0.5kN m continuous beam: Maximum bending moment 4.68kN m, and span centre maximum defluxion is 29mm.
Thus can obtaining, when with amount of deflection for major control factors, continuous beam, compared to simply supported beam, embodies extremely great advantage.
Claims (4)
1. the present invention " novel bamboo and wood continuous beam prestress application system " is a kind of continuous beam application system suitable in field of civil engineering, it is characterized in that the mode by external layout reinforcing bar, carries out prestressed applying by moving up and down of screw rod.
2. according to claim 1 to " continuous beam ", it is characterised in that: the continuous beam existence by fulcrum hogging moment, reduce mid-span deflection so that it is internal force distribution is more reasonable, it is adaptable to the bamboo and wood beam that span is bigger.
3. according to claim 1 to " novel ", it is characterized in that: change conventional reserving hole channel and wear the method joining presstressed reinforcing steel, adopt the mode of external cloth muscle, reinforcement location is controlled by groove arc steering block, making it be close to beam body both sides, both ensure that the globality of bamboo and wood beam body, the system height of in turn ensure that will not be excessive, and construction extremely convenient, efficiently, it is easy to promote.
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 |
|---|---|---|---|
| CN201410747602.3A CN105735653A (en) | 2014-12-09 | 2014-12-09 | Novel bamboo and wood continuous beam prestressing force exertion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410747602.3A CN105735653A (en) | 2014-12-09 | 2014-12-09 | Novel bamboo and wood continuous beam prestressing force exertion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105735653A true CN105735653A (en) | 2016-07-06 |
Family
ID=56238229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410747602.3A Pending CN105735653A (en) | 2014-12-09 | 2014-12-09 | Novel bamboo and wood continuous beam prestressing force exertion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105735653A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654085A (en) * | 2017-09-20 | 2018-02-02 | 浙江剑锋加固工程有限公司 | A kind of method for reinforcing H-shaped girder steel and more Span Continuous steel Eurya plant bars |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1127824A (en) * | 1995-09-08 | 1996-07-31 | 周志祥 | Method for construction of transverse tension prestress concrete beam |
| JPH11241507A (en) * | 1998-02-24 | 1999-09-07 | Takenaka Komuten Co Ltd | Rise adjustable type outside pc steel material construction method to control deflection of beam and movable support for pc steel material used therefor |
| 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
- 2014-12-09 CN CN201410747602.3A patent/CN105735653A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1127824A (en) * | 1995-09-08 | 1996-07-31 | 周志祥 | Method for construction of transverse tension prestress concrete beam |
| JPH11241507A (en) * | 1998-02-24 | 1999-09-07 | Takenaka Komuten Co Ltd | Rise adjustable type outside pc steel material construction method to control deflection of beam and movable support for pc steel material used therefor |
| 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654085A (en) * | 2017-09-20 | 2018-02-02 | 浙江剑锋加固工程有限公司 | A kind of method for reinforcing H-shaped girder steel and more Span Continuous steel Eurya plant bars |
| CN107654085B (en) * | 2017-09-20 | 2019-11-01 | 浙江剑锋加固工程有限公司 | A method of reinforcing H-shaped girder steel and multispan continuous purline |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160706 |