CN202672483U - Pre-tensioning method prestressing superposed beam prefabricated member with notches and brackets - Google Patents
Pre-tensioning method prestressing superposed beam prefabricated member with notches and brackets Download PDFInfo
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- CN202672483U CN202672483U CN 201220306524 CN201220306524U CN202672483U CN 202672483 U CN202672483 U CN 202672483U CN 201220306524 CN201220306524 CN 201220306524 CN 201220306524 U CN201220306524 U CN 201220306524U CN 202672483 U CN202672483 U CN 202672483U
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Abstract
The utility model relates to a pre-tensioning method prestressing superposed beam prefabricated member with notches and brackets. The prefabricated member comprises a superposed beam prefabricated member main body part; a plurality of notches are formed on the superposed beam prefabricated member main body part; and the bottom of each notch is provided with a bracket. The pre-tensioning method prestressing superposed beam prefabricated member with the notches and the brackets is suitable to be used on a frame beam, in which a superposed auxiliary beam is placed, in a prefabricating whole pouring system; and the prefabricated member has the advantages that the prefabricated member is convenient to construct, safe and reliable in structure and can effectively transfer the born construction load.
Description
Technical field
The utility model relates to a kind of building unit, is specifically related to a kind of pretensioned prestressing superposed beam prefabricated units with jagged and bracket, belongs to technical field of civil engineering.
Background technology
The integral precast reinforced concrete structure is to assemble at the construction field (site) by structural element such as the structural column of finishing partly being prefabricated in the factory in advance, beam, wall, plates, and then carry out prefabricated units connected node each other, and the formwork of part cast-in-place structural and reinforcing bar binding operation, at last by concrete cast in situs, so that between the prefabricated structural element, and prefabricated structural element and cast-in-place structure to form a complete building structure whole.
At present, in being connected that superimposed secondary beam and laminated frame are set a roof beam in place, there are two kinds of ways, a kind of is the end face that the plush copper that superimposed secondary beam prefabricated units end is used for shelving directly is shelved on coincidence of a correspondence Vierendeel girder prefabricated units, this way need to install side template so that soffit will exceed larger discrepancy in elevation of the beam prefabricated member end face of composite frame when overlapping layers is built so that laminated frame is set a roof beam in place between soffit and the beam prefabricated member end face of composite frame.
Another kind of way is to reserve a breach on lay-down position corresponding to the superimposed secondary beam of the beam prefabricated member end face of composite frame, to be used for shelving the plush copper of shelving of being used for of superimposed secondary beam prefabricated units end.This way is for so that superimposed secondary beam can have certain shelving length, and often the depth of breach is larger, and when the beam prefabricated member of composite frame both sides all had superimposed secondary beam prefabricated units to shelve, the remainder between the breach was often narrower, perhaps connects fully.Although so can be so that the beam prefabricated member end face of composite frame and soffit maintain an equal level, save above-mentioned side template, but just because of breach is too large, so that the beam prefabricated member of composite frame can't dispose elongated longitudinal prestressing reinforcing bar in the cut height position, this reinforcing bar can effectively be born a tension stress that the prefabricated units upper surface is formed after putting because of the elongated prestressed reinforcement of prefabricated units bottom configuration, the concrete crack width in control top, just therefore, restricted the configuration quantity of the elongated prestressed reinforcement in bottom that laminated frame sets a roof beam in place, the designing requirement of ultimate limit states and serviceability limit state so that the beam prefabricated member of composite frame has to satisfy by increasing section height or width.
Therefore, for solving the problems of the technologies described above, necessaryly provide a kind of structure improved pretensioned prestressing superposed beam prefabricated units with jagged and bracket that have, to overcome described defective of the prior art.
The utility model content
For addressing the above problem, the purpose of this utility model is to provide a kind of easy construction, and the construction load that can will bear is carried out the pretensioned prestressing superposed beam prefabricated units with jagged and bracket of effective communication.
For achieving the above object, the technical scheme that the utility model is taked is: a kind of pretensioned prestressing superposed beam prefabricated units with jagged and bracket, and it comprises a superposed beam prefabricated units main part; Be provided with some breach in described superposed beam prefabricated units main part; Be provided with a bracket in the bottom of each breach.
Pretensioned prestressing superposed beam prefabricated units with jagged and bracket of the present utility model further are set to: comprise bottom prestressed reinforcement, waist muscle, top prestressed reinforcement, stirrup and bracket built-in fitting in the described superposed beam prefabricated units main part.
Pretensioned prestressing superposed beam prefabricated units with jagged and bracket of the present utility model further are set to: be arranged with plastic pipe or parcel Polypropylence Sheet on the prestressed reinforcement of described bottom, the length of described plastic pipe or Polypropylence Sheet is not more than 1/8th of superposed beam prefabricated units main part length.
Pretensioned prestressing superposed beam prefabricated units with jagged and bracket of the present utility model further are set to: further have additional nonprestressed reinforcement in described superposed beam prefabricated units main part lower edge.
Pretensioned prestressing superposed beam prefabricated units with jagged and bracket of the present utility model further are set to: the rectangular structure of described breach, its end face from superposed beam prefabricated units main part is offered downwards.
Pretensioned prestressing superposed beam prefabricated units with jagged and bracket of the present utility model further are set to: the rectangular structure of described bracket, and it comprises a steel top board, and the supporting steel plate that is welded in steel top board soffit and bracket built-in fitting external surface; Described supporting steel plate is equidistant distribution, and its number is 2-4 piece and rectangular or trapezium structure.
Pretensioned prestressing superposed beam prefabricated units with jagged and bracket of the present utility model further are set to: described bracket built-in fitting is by the mutually concordant steel plate of two external surfaces and described pretensioned prestressing superposed beam prefabricated units external surface, and with steel plate between be welded to each other the embedded bar that is connected and consist of.
Pretensioned prestressing superposed beam prefabricated units with jagged and bracket of the present utility model also can be set to: the end face of described bracket and the bottom surface of breach are contour, and this bracket end face is chosen 50mm outward with respect to superposed beam prefabricated units main part.
Compared with prior art, the utlity model has following beneficial effect:
1. the pretensioned prestressing superposed beam prefabricated units with jagged and bracket of the present utility model are higher at the useful cross section of construction stage, so that between the beam prefabricated member end face of composite frame made from described superposed beam prefabricated units and the soffit without the discrepancy in elevation, save side template each other.
2. the breach of the pretensioned prestressing superposed beam prefabricated units with jagged and bracket of the present utility model is less, so that remove outside the breach on the top of described superposed beam prefabricated units, still leave larger effective width, can be according to design requirement, place the prestressed reinforcement that needs, thereby so that described superposed beam prefabricated units can be given full play to the effectiveness of prestressed reinforcement, effectively reduce depth of section.
3. the main part of the pretensioned prestressing superposed beam prefabricated units with jagged and bracket of the present utility model and bracket, bracket built-in fitting all can carry out designing and calculating according to existing code for structural design, and Prefabrication is simple.
4. the pretensioned prestressing superposed beam prefabricated units with jagged and bracket of the present utility model are one-sided when shelving superimposed secondary beam prefabricated units, although shelving the load of plush copper transmission, superimposed secondary beam prefabricated units have certain off-centre for described superposed beam prefabricated units, but should off-centre very little, can give balance by described superposed beam prefabricated units deadweight fully, described superimposed secondary beam prefabricated units also have a lateral support effect simultaneously, also can play certain effect that prevents described superposed beam prefabricated units side direction counter-rotating, so structural safety is reliable.
5. the pretensioned prestressing superposed beam prefabricated units with jagged and bracket of the present utility model have used high strength steel strand, high-strength concrete to make the superposed beam prefabricated units, effectively saved material usage, adopt simultaneously the superposed beam prefabricated units to bear and transmit flooring member dead weight and working load, save the formwork erection expense, therefore described superposed beam prefabricated units have preferably Technical Economy.
Description of drawings
Fig. 1 is the schematic diagram of the pretensioned prestressing superposed beam prefabricated units with jagged and bracket of the present utility model.
Fig. 2 is along the sectional drawing of I-I among Fig. 1.
The specific embodiment
See also shown in Figure of description 1 and the accompanying drawing 2, the utility model is a kind of pretensioned prestressing superposed beam prefabricated units with jagged and bracket, and it comprises a superposed beam prefabricated units main part 1; Be provided with some breach 2 in described superposed beam prefabricated units main part 1; Be provided with a bracket 3 in the bottom of each breach 2.
Further, be provided with bottom prestressed reinforcement 11, waist muscle 12, top prestressed reinforcement 13, stirrup 14 and bracket built-in fitting 4 in the described superposed beam prefabricated units main part 1.Wherein, described bottom prestressed reinforcement 11 is high strength steel strand, when calculating needs configuring multi-layer bottom prestressed reinforcement 11 according to ultimate limit states, can be arranged with plastic pipe 15 or parcel Polypropylence Sheet 15 at described part bottom prestressed reinforcement 11, to form the free shrink section, the length of described plastic pipe or Polypropylence Sheet 15 is not more than 1/8th of superposed beam main part 1 length, to not affect structure stress thus, thereby so that after prestressed reinforcement 11 is put, this partial prestressing reinforcing bar without prestressing force, avoids described superposed beam prefabricated units to put a concrete compressive stress undue concentration that causes and the crack occurs at end invar twisted wire in free shrink section zone.
When design in the Areas of High Earthquake Intensity district, the described superposed beam prefabricated units main part 1 of making, need to set up certain nonprestressed reinforcement 16 at the lower edge of its end, under the constraint seismic loading, the width in the normal section crack that superposed beam end lower edge produces.
Described breach 2 rectangular structures, its end face from superposed beam prefabricated units main part 1 is offered downwards.When described superposed beam prefabricated units width was 250mm ~ 280mm, breach 2 degree of depth were got 55mm, and width is during greater than 280mm, and breach 2 degree of depth are got 70mm.
Described bracket built-in fitting 4 is by the mutually concordant bracket built-in fitting steel plate 41 of two external surfaces and this prestressing force superposed beam prefabricated units external surface, and with bracket built-in fitting steel plate 41 between be welded to each other the embedded bar 42 that is connected and consist of.
Described bracket 3 rectangular structures, it comprises a steel top board 31, and the supporting steel plate 32 that is welded in steel top board 31 soffits and bracket built-in fitting steel plate 41 external surfaces.Described supporting steel plate 32 is equidistant distribution, and its number is 2-4 piece and rectangular or trapezium structure.The bottom surface of the end face of described bracket 3 and breach 2 is contour, and these bracket 3 end faces are with respect to the superposed beam main part 1 outer 50mm that chooses.
The above specific embodiment only is the preferred embodiment of this creation, not in order to limiting this creation, all in this creation spirit and principle within make any modification, be equal to replacement, improvement etc., all should be included within the protection domain of this creation.
Claims (7)
1. the pretensioned prestressing superposed beam prefabricated units with jagged and bracket is characterized in that: comprise a superposed beam prefabricated units main part; Be provided with some breach in described superposed beam prefabricated units main part; Be provided with a bracket in the bottom of each breach.
2. the pretensioned prestressing superposed beam prefabricated units with jagged and bracket as claimed in claim 1 is characterized in that: comprise bottom prestressed reinforcement, waist muscle, top prestressed reinforcement, stirrup and bracket built-in fitting in the described superposed beam prefabricated units main part.
3. pretensioned prestressing superposed beam prefabricated units with jagged and bracket as claimed in claim 2, it is characterized in that: be arranged with plastic pipe or parcel Polypropylence Sheet on the prestressed reinforcement of described bottom, the length of described plastic pipe or Polypropylence Sheet is not more than 1/8th of superposed beam main part length.
4. the pretensioned prestressing superposed beam prefabricated units with jagged and bracket as claimed in claim 3 is characterized in that: further have additional nonprestressed reinforcement in described superposed beam prefabricated units main part lower edge.
5. pretensioned prestressing superposed beam prefabricated units with jagged and bracket as claimed in claim 1, it is characterized in that: the rectangular structure of described breach, its end face from superposed beam prefabricated units main part is offered downwards.
6. pretensioned prestressing superposed beam prefabricated units with jagged and bracket as claimed in claim 2, it is characterized in that: the rectangular structure of described bracket, it comprises a steel top board, and the supporting steel plate that is welded in steel top board soffit and bracket built-in fitting external surface; Described supporting steel plate is equidistant distribution, and its number is 2-4 piece and rectangular or trapezium structure.
7. pretensioned prestressing superposed beam prefabricated units with jagged and bracket as claimed in claim 6, it is characterized in that: the end face of described bracket and the bottom surface of breach are contour, and this bracket end face is chosen 50mm outward with respect to superposed beam prefabricated units main part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220306524 CN202672483U (en) | 2012-06-28 | 2012-06-28 | Pre-tensioning method prestressing superposed beam prefabricated member with notches and brackets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220306524 CN202672483U (en) | 2012-06-28 | 2012-06-28 | Pre-tensioning method prestressing superposed beam prefabricated member with notches and brackets |
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| Publication Number | Publication Date |
|---|---|
| CN202672483U true CN202672483U (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220306524 Expired - Fee Related CN202672483U (en) | 2012-06-28 | 2012-06-28 | Pre-tensioning method prestressing superposed beam prefabricated member with notches and brackets |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733544A (en) * | 2012-06-28 | 2012-10-17 | 华汇工程设计集团股份有限公司 | Pretension prestress composite beam prefabricated component having gaps and corbels |
-
2012
- 2012-06-28 CN CN 201220306524 patent/CN202672483U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733544A (en) * | 2012-06-28 | 2012-10-17 | 华汇工程设计集团股份有限公司 | Pretension prestress composite beam prefabricated component having gaps and corbels |
| CN102733544B (en) * | 2012-06-28 | 2014-12-10 | 华汇工程设计集团股份有限公司 | Pretension prestress composite beam prefabricated component having gaps and corbels |
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| 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 |
Granted publication date: 20130116 Termination date: 20150628 |
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| EXPY | Termination of patent right or utility model |