CN209585411U - A kind of cored slab using the straight-line prestressed reinforcing bar of pre-tensioning system - Google Patents
A kind of cored slab using the straight-line prestressed reinforcing bar of pre-tensioning system Download PDFInfo
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- CN209585411U CN209585411U CN201920046891.2U CN201920046891U CN209585411U CN 209585411 U CN209585411 U CN 209585411U CN 201920046891 U CN201920046891 U CN 201920046891U CN 209585411 U CN209585411 U CN 209585411U
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- cored slab
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Abstract
The utility model discloses a kind of cored slabs using the straight-line prestressed reinforcing bar of pre-tensioning system, cored slab is to be transversely and horizontally set, six groups of deformed bars are arranged at cored slab bottom, second, the both ends of five groups of deformed bars are arranged with first group of plastic tube, second, five groups of deformed bar quantity are identical with first group of plastic tube quantity, third, the both ends of four groups of deformed bars are arranged with second group of plastic tube, third, four groups of deformed bar quantity are identical with second group of plastic tube quantity, first, six groups of deformed bars are not arranged plastic tube, length of the length of first group of plastic tube less than second group of plastic tube；The resist torque that the structure can provide to avoid cored slab bottom plate wastes serious, the excessive generation for leading to drawing crack phenomenon of prestressing force, not only increases the performance of cored slab bottom plate, can also increase the span of cored slab bottom plate.
Description
Technical field
The utility model belongs to engineering construction technical field, more particularly to a kind of uses the straight-line prestressed reinforcing bar of pre-tensioning system
Cored slab.
Background technique
Pre-tensioning system is the pretensioning muscle before concrete component pours, and with fixture by its anchoring temporarily in pedestal or
On punching block, then concrete members are poured, (about 75%) loosens and cut off presstressed reinforcing steel, presstressed reinforcing steel after it reaches some strength
Elastical retraction is generated, by the bonding between concrete and presstressed reinforcing steel, compressive pre-stress is generated to concrete, does not need special anchor
Tool.
For the concrete core slab that conventional method obtains, bending moment diagram such as Fig. 2 institute of the concrete core slab in self gravity
Show, and the eccentric moment figure that the concrete core slab bottom deformed bar that pre-tensioning system obtains generates from figure as shown in figure 3, compare
Compared with it can be concluded that, pretensioned concrete cored slab bottom deformed bar provide resist torque can not be fully utilized, exist
Waste serious phenomenon, and the characteristic that concrete itself is poorer than compressive property there is also tensile property, it may appear that because of pre-tensioning system
Prestressing force it is excessive so as to cause drawing crack the phenomenon that.
Utility model content
In view of the above-mentioned problems, the utility model provides a kind of cored slab using the straight-line prestressed reinforcing bar of pre-tensioning system, very
The resist torque waste for solving the offer of pretensioned concrete cored slab bottom deformed bar well is serious, prestressing force is excessive leads
The phenomenon that causing drawing crack.
To achieve the goals above, the technical solution adopted in the utility model is as follows: a kind of to be answered in advance using pre-tensioning system straight line
The cored slab of power reinforcing bar, cored slab be transversely and horizontally set, cored slab bottom have six groups it is horizontally-parallel and through cored slab be arranged
Deformed bar, the both ends of second, five group of deformed bar are arranged with first group of plastic tube, second, five group of prestress steel
Muscle quantity is identical with first group of plastic tube quantity, and the both ends of third and fourth group of deformed bar are arranged with second group of plastic tube, the
Three, four groups of deformed bar quantity are identical with second group of plastic tube quantity, and first, six group of deformed bar is not arranged plastic tube；
Length of the length of first group of plastic tube less than second group of plastic tube.
Preferably, the spacing at the both ends of the cored slab is 20m.
Preferably, the length of first group of plastic tube is 3m；The length of second group of plastic tube is 6m.
Preferably, the material of first group of plastic tube and second group of plastic tube is polyvinyl chloride.
Preferably, the quantity of described first group to the 6th group deformed bar is 8.
Compared with prior art, the utility model has following the utility model has the advantages that first group of plastic tube and second group of plastic tube
Setting, the resist torque waste that can be provided to avoid cored slab bottom deformed bar is serious, prestressing force is excessive causes drawing crack existing
The generation of elephant not only increases the performance of cored slab bottom plate, can also increase the span of cored slab bottom plate.
Detailed description of the invention
Fig. 1 is the perspective view of the utility model；
Fig. 2 is the cored slab bending moment diagram that conventional method obtains；
Fig. 3 is the cored slab eccentric moment figure that general pre-tensioning system obtains；
Fig. 4 is the cored slab eccentric moment figure of the utility model.
In figure: 1, first group of deformed bar；2, second group of deformed bar；3, third group deformed bar；4, the 4th
Group deformed bar；5, the 5th group of deformed bar；6, the 6th group of deformed bar；7, first group of plastic tube；8, the second retable
Expects pipe；9, cored slab bottom.
Specific embodiment
As shown in Figure 1, a kind of cored slab using the straight-line prestressed reinforcing bar of pre-tensioning system described in the utility model, cored slab
To be transversely and horizontally set, the distance between hollow board ends are 20m, cored slab bottom 9 have six groups it is horizontally-parallel and through hollow
The deformed bar of plate setting, the quantity of first group of deformed bar 1 to the 6th group of deformed bar 6 is 4；Second group pre-
The both ends of stress reinforcing bar 2 and the 5th group of deformed bar 5 are arranged with first group of plastic tube 7, second group of deformed bar 2 and
The quantity of five groups of deformed bars 5 is identical with first group of 7 quantity of plastic tube, and third group deformed bar 3 and the 4th group are answered in advance
The both ends of power reinforcing bar 4 are arranged with second group of plastic tube 8, the quantity of third group deformed bar 3 and the 4th group of deformed bar 4
Identical with second group of 8 quantity of plastic tube, first group of deformed bar 1 and the 6th group of deformed bar 6 are not arranged plastic tube；
Length of the length of first group of plastic tube 7 less than second group of plastic tube 8.
The length of first group of plastic tube 7 is 3m, and the length of second group of plastic tube 8 is 6m；First group of 7 He of plastic tube
The material of second group of plastic tube 8 is polyvinyl chloride.
For the concrete core slab that conventional method obtains, bending moment diagram such as Fig. 2 institute of the concrete core slab in self gravity
Show, the moment of flexure at the support is gradually decreased as zero, and the concrete core slab bottom prestressing force guiding principle muscle that general pre-tensioning system obtains
The eccentric moment figure of generation as shown in figure 3, from the figure we can see that, the bottom of pretensioning prestressed concrete cored slab is pre-
The resist torque for answering manrope muscle to provide can not be fully utilized, and there is the serious phenomenon of waste situation.Due to the tension of concrete
Performance is poorer than compressive property, (ultimate tensile value be about compressive ultimate value 1/10th), and concrete is easy crack in tension, passes through
The method for adding plastic tube, adjusts the resist torque of prestressed concrete member, improves the utilization rate of presstressed reinforcing steel, prestressing force
Eccentric moment figure as shown in figure 4, and the tensile stress of the concrete at support can be reduced, to effectively prevent opening for concrete
It splits.
In short, the utility model can be excessive so as to cause drawing crack because of pulling force to avoid concrete.Prestressing force can also be improved
The tension stress of reinforcing bar makes the performance of prestressed component get a promotion, and mitigates dead load, increases the span of component.
Claims (5)
1. a kind of cored slab using the straight-line prestressed reinforcing bar of pre-tensioning system, it is characterised in that: the cored slab is transversely and horizontally
Six groups of deformed bars horizontally-parallel and through cored slab setting, second, five group of deformed bar are arranged at setting, cored slab bottom
Both ends be arranged with first group of plastic tube, second, five group of deformed bar quantity is identical with first group of plastic tube quantity,
Three, the both ends of four groups of deformed bars are arranged with second group of plastic tube, third and fourth group of deformed bar quantity and the second retable
Expects pipe quantity is identical, and first, six group of deformed bar is not arranged plastic tube；The length of first group of plastic tube is less than second
The length of group plastic tube.
2. a kind of cored slab using the straight-line prestressed reinforcing bar of pre-tensioning system according to claim 1, it is characterised in that: described
Cored slab both ends spacing be 20m.
3. a kind of cored slab using the straight-line prestressed reinforcing bar of pre-tensioning system according to claim 1, it is characterised in that: described
First group of plastic tube length be 3m；The length of second group of plastic tube is 6m.
4. a kind of cored slab using the straight-line prestressed reinforcing bar of pre-tensioning system according to claim 1 or 3, it is characterised in that:
The material of first group of plastic tube and second group of plastic tube is polyvinyl chloride.
5. a kind of cored slab using the straight-line prestressed reinforcing bar of pre-tensioning system according to claim 1, it is characterised in that: described
The quantity of first group to the 6th group deformed bar be 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920046891.2U CN209585411U (en) | 2019-01-11 | 2019-01-11 | A kind of cored slab using the straight-line prestressed reinforcing bar of pre-tensioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920046891.2U CN209585411U (en) | 2019-01-11 | 2019-01-11 | A kind of cored slab using the straight-line prestressed reinforcing bar of pre-tensioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209585411U true CN209585411U (en) | 2019-11-05 |
Family
ID=68352446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920046891.2U Expired - Fee Related CN209585411U (en) | 2019-01-11 | 2019-01-11 | A kind of cored slab using the straight-line prestressed reinforcing bar of pre-tensioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209585411U (en) |
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2019
- 2019-01-11 CN CN201920046891.2U patent/CN209585411U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191105 Termination date: 20220111 |
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| CF01 | Termination of patent right due to non-payment of annual fee |