CN202882219U - Retard-bonded prestressed hollow steel reinforced concrete (SRC) beam - Google Patents
Retard-bonded prestressed hollow steel reinforced concrete (SRC) beam Download PDFInfo
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- CN202882219U CN202882219U CN 201220497875 CN201220497875U CN202882219U CN 202882219 U CN202882219 U CN 202882219U CN 201220497875 CN201220497875 CN 201220497875 CN 201220497875 U CN201220497875 U CN 201220497875U CN 202882219 U CN202882219 U CN 202882219U
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- concrete beam
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Abstract
The utility model relates to a hollow steel reinforced concrete (SRC) beam, belonging to the field of civil engineering. The retard-bonded prestressed hollow SRC beam comprises a concrete beam, wherein hollow steel ribs are arranged in the concrete beam; non-prestressed tendons are arranged around the hollow steel ribs; and stirrups are bound outside the non-prestressed tendons. The hollow SRC beam is characterized in that the hollow steel ribs comprise angle steel at four angles; and retard-bonded prestressed tendons are arranged near the lower angle steel by passing through the concrete beam and are formed by covering prestressed tendons with retarding mortar and then covering the retarding mortar with waterproof plastic cloths. The retard-bonded prestressed hollow SRC beam adopts the retard-bonded prestressed tendons for tensioning, so that the concrete beam is light in dead load, is simple and convenient to construct and has the characteristic of high flexural ultimate bearing capacity, thus being beneficial to popularization and application of the hollow SRC beam.
Description
Technical field
The utility model relates to a kind of open web type steel framed concrete beam, relates in particular to a kind of retarded adhesive prestressed open web type steel framed concrete beam.
Background technology
The open web type steel reinforced concrete structure is in the inner embedding a kind of combining structure by batten plate connecting angle Special composition truss reinforcing bar of steel concrete, space truss steel skeleton has preferably constraint to core concrete, and out of shaping by limit compression, compressive strength, the rigidity of core concrete are all increased.Yet in the situation that some are had relatively high expectations to the rigidity of structure, crack and Deformation control often are difficult to meet the demands.Therefore, prestressing force open web type steel reinforced concrete structure arises at the historic moment, and it is to apply prestressing force in the open web type steel reinforced concrete structure, thereby improves cracking resistance and the non-deformability of structure.On the other hand, compare the real abdomen formula of prestressing force steel reinforced concrete structure, in the open web type reinforcing bar, presstressed reinforcing steel is arranged suffered restriction still less, constructs also more convenient.
In recent years, in prestressing force reinforcing bar concrete structure, adopted these two kinds of form muscle of bonded prestressed tendon and unbonded prestressing tendon to carry out stretch-draw.The prestressing force reinforcing bar concrete structure that the bonding muscle is arranged for use, because in work progress, need reserving hole channel, wear muscle, the operation such as grouting, this causes, and construction is complicated, speed is slow, and the easy corrosion of presstressed reinforcing steel consequently has the danger of fracture of wire, and functional performance is not very desirable; And for the prestressing force reinforcing bar concrete structure that uses unbonded tendon, though defects can improve, can make the beaming resistance limit bearing capacity reduce 10%-20%.Therefore can research and develop the novel pre-stressed steel reinforced concrete structure of a kind of easy construction and dependable performance, overcome defects, from economically with the promotion and application of technical promotion prestressing force open web type steel reinforced concrete structure engineering.
The utility model content
Technical problem to be solved in the utility model provides a kind of retarded adhesive prestressed open web type steel framed concrete beam, and the construction of solution prior art is complicated, speed is slow, functional performance or the undesirable defective of beaming resistance limit bearing capacity.
Technical scheme
A kind of retarded adhesive prestressed open web type steel framed concrete beam, comprise concrete beam, be provided with the open web type reinforcing bar in the described concrete beam, be provided with non-prestressing tendon around the open web type reinforcing bar, colligation is equipped with stirrup outside non-prestressing tendon, it is characterized in that: described open web type reinforcing bar comprises four jiaos angle steel, near lower angle steel, pass concrete beam and be provided with delayed bonding prestressed tendon, described delayed bonding prestressed tendon adopts at presstressed reinforcing steel outer wrapping retarding mortar, the mode of wrapping up with waterproof Polypropylence Sheet again outside retarding mortar; Described delayed bonding prestressed tendon passes concrete beam, is fixed on the described concrete beam with anchor device.
Four angle steel of described open web type reinforcing bar are by the centre that is arranged symmetrically in described concrete beam cross section.
Described delayed bonding prestressed tendon is provided with two, and the lower angle steel that is installed in the open web type reinforcing bar is inboard.
Beneficial effect
Retarded adhesive prestressed open web type steel framed concrete beam of the present utility model adopts delayed bonding prestressed tendon to carry out stretch-draw, make that concrete beam had both had that the dead load of prestressing without bondn girder with rolled steel section en cased in concrete is light, easy construction, fireballing shortcoming, the high characteristics of beaming resistance limit bearing capacity that have again the bonded prestress girder with rolled steel section en cased in concrete are conducive to the promotion and application of retarded adhesive prestressed open web type steel framed concrete beam in Practical Project.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model structural section schematic diagram.
Fig. 3 is delayed bonding prestressed tendon sectional drawing in the utility model structure.
Wherein: 1-concrete beam, 2-non-prestressing tendon, 3-stirrup, 4-open web type reinforcing bar, 5-delayed bonding prestressed tendon, 6-anchor device, 7-prestressed reinforcement, 8-retarding mortar, the waterproof Polypropylence Sheet of 9-.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the utility model.
The utility model proposes a kind of retarded adhesive prestressed open web type steel framed concrete beam, comprise concrete beam 1, be provided with open web type reinforcing bar 4 in the described concrete beam 1, be provided with non-prestressing tendon 2 around the open web type reinforcing bar 4, in non-prestressing tendon 2 outer colligations stirrup 3 is installed, described open web type reinforcing bar 4 comprises four jiaos angle steel, near lower angle steel, pass concrete beam 1 and be provided with delayed bonding prestressed tendon 5, described delayed bonding prestressed tendon 5 adopts at presstressed reinforcing steel 7 outer wrapping retarding mortars 8, the mode of wrapping up with waterproof Polypropylence Sheet 9 again outside retarding mortar 8.Described delayed bonding prestressed tendon 5 passes concrete beam 1, is fixed on the described concrete beam 1 with anchor device 6.
Four angle steel of described open web type reinforcing bar 4 are by the centre that is arranged symmetrically in described concrete beam 1 cross section.
Described delayed bonding prestressed tendon 5 is provided with two, and the lower angle steel that is installed in open web type reinforcing bar 4 is inboard.
The utility model structure can realize in the following ways: during construction, lay first concrete beam 1 beam bottom mother plate, after reinforcing checking, support ironware at the good open web type reinforcing bar 4 of beam bottom mother plate pad, after four angle steel of open web type reinforcing bar 4 are installed respectively, nonprestressed reinforcement 2 and stirrup 3 on the colligation beam, then wear delayed bonding prestressed tendon 5, then install beam side, fluid concrete, after concrete reaches certain intensity (be not less than design strength 75%), adopt jack pair delayed bonding prestressed tendon 5 to carry out prestressed stretch-draw, after stretch-draw is complete, use fixedly delayed bonding prestressed tendon 5 of anchor device 6, and carry out sealing protection, last stripping.Whole operation is easy to be clear, greatly improves speed of application.
This retarded adhesive prestressed open web type steel framed concrete beam is to adopt delayed bonding prestressed tendon 5 to carry out stretch-draw in the open web type steel framed concrete beam, surrounded surface sealed envelope one deck retarding mortar 8 at presstressed reinforcing steel 7 wraps with Polypropylence Sheet 9 again, before tension of prestressed tendon, have like this characteristics without the adhesive structure easy construction, have again the high characteristics of bonded prestressed tendon structure beaming resistance limit bearing capacity in the later stage.Confirm by experimental study, this structure has the following advantages:
(1) dead load is light.Because adopt delayed bonding prestressed tendon 5, beam does not need reserving hole channel, reduces size, alleviates deadweight, be conducive to alleviate the load of lower support post and reduce cost.
(2) easy construction, speed is fast.During construction, delayed bonding prestressed tendon 5 is laid in the template by designing requirement, and then concreting carries out stretch-draw, anchoring, shutoff end after concrete reaches some strength.The complicated procedures of forming such as it need not reserving hole channel, wear muscle, grouting have been simplified construction technology, have accelerated construction speed.
(3) the beaming resistance limit bearing capacity is high.After construction is finished through the fixed time; retarded adhesive material in the delayed bonding prestressed tendon 5 begins to harden and reach suitable bonding and compressive strength; presstressed reinforcing steel 7 is produced parcel and protective effect, so that presstressed reinforcing steel 7 and concrete component are bonded as one, have the compatibility of deformation relation between the two.
The utility model does not need reserving hole channel, wears muscle and stretch-draw post-grouting etc. in work progress, greatly simplified construction technology, in use can alleviate dead load, overcome simultaneously the lower shortcoming of Ultimate Bearing Capacity of prestressing without bondn girder with rolled steel section en cased in concrete, functional performance is good, has good economy and applicability.
Claims (3)
1. retarded adhesive prestressed open web type steel framed concrete beam, comprise concrete beam (1), be provided with open web type reinforcing bar (4) in the described concrete beam (1), open web type reinforcing bar (4) is provided with non-prestressing tendon (2) all around, colligation is equipped with stirrup (3) outside non-prestressing tendon (2), it is characterized in that: described open web type reinforcing bar (4) comprises four jiaos angle steel, near lower angle steel, pass concrete beam (1) and be provided with delayed bonding prestressed tendon (5), described delayed bonding prestressed tendon (5) adopts at presstressed reinforcing steel (7) outer wrapping retarding mortar (8), the mode of wrapping up with waterproof Polypropylence Sheet (9) again outside retarding mortar (8); Described delayed bonding prestressed tendon (5) passes concrete beam (1), is fixed on the described concrete beam (1) with anchor device (6).
2. retarded adhesive prestressed open web type steel framed concrete beam as claimed in claim 1, it is characterized in that: four angle steel of described open web type reinforcing bar (4) are by the centre that is arranged symmetrically in described concrete beam (1) cross section.
3. retarded adhesive prestressed open web type steel framed concrete beam as claimed in claim 1, it is characterized in that: described delayed bonding prestressed tendon (5) is provided with two, and the lower angle steel that is installed in open web type reinforcing bar (4) is inboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220497875 CN202882219U (en) | 2012-09-26 | 2012-09-26 | Retard-bonded prestressed hollow steel reinforced concrete (SRC) beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220497875 CN202882219U (en) | 2012-09-26 | 2012-09-26 | Retard-bonded prestressed hollow steel reinforced concrete (SRC) beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202882219U true CN202882219U (en) | 2013-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220497875 Expired - Fee Related CN202882219U (en) | 2012-09-26 | 2012-09-26 | Retard-bonded prestressed hollow steel reinforced concrete (SRC) beam |
Country Status (1)
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| CN (1) | CN202882219U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561592A (en) * | 2012-02-20 | 2012-07-11 | 同济大学 | Retarded adhesive prestressed lattice type steel reinforced concrete beam |
| CN111021614A (en) * | 2019-12-19 | 2020-04-17 | 中国建筑第八工程局有限公司 | Multi-layer large-span prestressed system and frame body quick-dismantling construction method thereof |
-
2012
- 2012-09-26 CN CN 201220497875 patent/CN202882219U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561592A (en) * | 2012-02-20 | 2012-07-11 | 同济大学 | Retarded adhesive prestressed lattice type steel reinforced concrete beam |
| CN111021614A (en) * | 2019-12-19 | 2020-04-17 | 中国建筑第八工程局有限公司 | Multi-layer large-span prestressed system and frame body quick-dismantling construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20130926 |