CN102561592A - Retarded adhesive prestressed lattice type steel reinforced concrete beam - Google Patents
Retarded adhesive prestressed lattice type steel reinforced concrete beam Download PDFInfo
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- CN102561592A CN102561592A CN2012100393533A CN201210039353A CN102561592A CN 102561592 A CN102561592 A CN 102561592A CN 2012100393533 A CN2012100393533 A CN 2012100393533A CN 201210039353 A CN201210039353 A CN 201210039353A CN 102561592 A CN102561592 A CN 102561592A
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- concrete beam
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Abstract
The invention relates to a lattice type reinforced concrete beam and belongs to the field of civil engineering. The retarded adhesive prestressed lattice type steel reinforced concrete beam comprises a concrete beam (1), wherein the concrete beam (1) is internally provided with lattice type reinforcements (4); non-prestressed bars (2) are arranged around the lattice type reinforcements (4); a stirrup (3) is bound outside the non-prestressed bars (2); the retarded adhesive prestressed lattice type steel reinforced concrete beam is characterized in that the lattice type reinforcements (4) comprise steel angles at the four corners; retarded adhesive prestressed bars (5) are arranged near the lower steel angles and penetrate through the concrete beam (1); and the retarded adhesive prestressed bars (5) are wrapped in such a manner that retarded mortar (8) is wrapped outside prestressed bars (7), and then waterproof plastic cloth (9) is wrapped outside the retarded mortar (8). In the beam, the retarded adhesive prestressed bars are adopted for tensioning, so that the concrete beam has the characteristics of light deadweight, simplicity and convenience in construction and high ultimate bending strength bearing capacity, and the popularization and the application of the lattice type reinforced concrete beam are facilitated.
Description
Technical field
The present invention relates to a kind of open web type steel framed concrete beam, relate 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 that is made up of space truss steel skeleton the batten plate connecting angle of steel concrete; Space truss steel skeleton has constraint preferably to core concrete, and limit compressive strain, compressive strength, the rigidity of core concrete are all increased.Yet under some situation that the rigidity of structure is had relatively high expectations, 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 in the open web type steel reinforced concrete structure, to apply prestressing force, thereby improves the 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 less restriction, and it is also more convenient to construct.
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, 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,, can make the beaming resistance limit bearing capacity reduce 10%-20% though above-mentioned defective can improve for the prestressing force reinforcing bar concrete structure that uses unbonded tendon.Therefore can research and develop the novel pre-stressed steel reinforced concrete structure of a kind of easy construction and dependable performance, overcome above-mentioned defective, from economically with the promotion and application of technical promotion prestressing force open web type steel reinforced concrete structure engineering.
Summary of the invention
Technical problem to be solved by this invention 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 unfavorable 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 said 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: said open web type reinforcing bar comprises four jiaos angle steel; Near following angle steel, pass concrete beam and be provided with delayed bonding prestressed tendon, said delayed bonding prestressed tendon is employed in presstressed reinforcing steel outerwrap retarding mortar, the mode of outside retarding mortar, wrapping up with waterproof Polypropylence Sheet again.
Said delayed bonding prestressed tendon passes concrete beam, is fixed on the said concrete beam with anchor device.
Four angle steel of said open web type reinforcing bar are by the centre that is arranged symmetrically in said concrete beam cross section.
Said delayed bonding prestressed tendon is provided with two, and the following 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 invention 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 the bonded prestress girder with rolled steel section en cased in concrete again help the promotion and application of retarded adhesive prestressed open web type steel framed concrete beam in actual engineering.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a structural section sketch map of the present invention.
Fig. 3 is delayed bonding prestressed tendon sectional drawing in the structure of the present invention.
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 present invention.
The present invention 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 said concrete beam 1, be provided with non-prestressing tendon 2 around the open web type reinforcing bar 4, colligation is equipped with stirrup 3 outside non-prestressing tendon 2; Said open web type reinforcing bar 4 comprises four jiaos angle steel; Near following angle steel, pass concrete beam 1 and be provided with delayed bonding prestressed tendon 5, said delayed bonding prestressed tendon 5 is employed in presstressed reinforcing steel 7 outerwrap retarding mortars 8, the mode of outside retarding mortar 8, wrapping up with waterproof Polypropylence Sheet 9 again.
Said delayed bonding prestressed tendon 5 passes concrete beam 1, is fixed on the said concrete beam 1 with anchor device 6.
Four angle steel of said open web type reinforcing bar 4 are by the centre that is arranged symmetrically in said concrete beam 1 cross section.
Said delayed bonding prestressed tendon 5 is provided with two, and the following angle steel that is installed in open web type reinforcing bar 4 is inboard.
Structure of the present invention can adopt following mode to realize: during construction, lay concrete beam 1 beam bottom board plate earlier, after the reinforcing checking; On the beam bottom board plate, filled up the support ironware of open web type reinforcing bar 4, after four angle steel of open web type reinforcing bar 4 are installed respectively, nonprestressed reinforcement 2 and stirrup 3 on the colligation beam; Wear delayed bonding prestressed tendon 5 then, then install beam side, fluid concrete; After treating that 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 finishes; With the fixing delayed bonding prestressed tendon 5 of anchor device 6, and carry out sealing protection, last stripping.Whole operation is easy to be clear, improves speed of application greatly.
This retarded adhesive prestressed open web type steel framed concrete beam is in the open web type steel framed concrete beam, to adopt delayed bonding prestressed tendon 5 to carry out stretch-draw; Surrounded surface sealed envelope one deck retarding mortar 8 at presstressed reinforcing steel 7 wraps with Polypropylence Sheet 9 again; The characteristics that before tension of prestressed tendon, have no adhesive structure easy construction like this have the high characteristics of bonded prestressed tendon structure beaming resistance limit bearing capacity again in the later stage.Confirm that through 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, help alleviating the load and reduction cost of lower support post.
(2) easy construction, speed is fast.During construction, delayed bonding prestressed tendon 5 is laid in the template by designing requirement, and concreting is treated to carry out stretch-draw, anchoring, shutoff end after concrete reaches certain intensity then.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 accomplished through the fixed time; Slow setting material initial hardening in the delayed bonding prestressed tendon 5 also reaches suitable bonding and compressive strength; Presstressed reinforcing steel 7 is produced parcel and protective effect, make presstressed reinforcing steel 7 and concrete component bonding be one, have the compatibility of deformation relation between the two.
The present invention 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 the lower shortcoming of limit anti-bending bearing capacity of prestressing without bondn girder with rolled steel section en cased in concrete simultaneously, functional performance is good, has good and economic and applicability.
Claims (4)
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 said concrete beam (1), open web type reinforcing bar (4) is provided with non-prestressing tendon (2) all around, and colligation is equipped with stirrup (3) outside non-prestressing tendon (2); It is characterized in that: said open web type reinforcing bar (4) comprises four jiaos angle steel; Near following angle steel, pass concrete beam (1) and be provided with delayed bonding prestressed tendon (5), said delayed bonding prestressed tendon (5) is employed in presstressed reinforcing steel (7) outerwrap retarding mortar (8), the mode of outside retarding mortar (8), wrapping up with waterproof Polypropylence Sheet (9) again.
2. retarded adhesive prestressed open web type steel framed concrete beam as claimed in claim 1 is characterized in that: said delayed bonding prestressed tendon (5) passes concrete beam (1), is fixed on the said concrete beam (1) with anchor device (6).
3. according to claim 1 or claim 2 retarded adhesive prestressed open web type steel framed concrete beam, it is characterized in that: four angle steel of said open web type reinforcing bar (4) are by the centre that is arranged symmetrically in said concrete beam (1) cross section.
4. according to claim 1 or claim 2 retarded adhesive prestressed open web type steel framed concrete beam, it is characterized in that: said delayed bonding prestressed tendon (5) is provided with two, and the following angle steel that is installed in open web type reinforcing bar (4) is inboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100393533A CN102561592A (en) | 2012-02-20 | 2012-02-20 | Retarded adhesive prestressed lattice type steel reinforced concrete beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100393533A CN102561592A (en) | 2012-02-20 | 2012-02-20 | Retarded adhesive prestressed lattice type steel reinforced concrete beam |
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| CN102561592A true CN102561592A (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100393533A Pending CN102561592A (en) | 2012-02-20 | 2012-02-20 | Retarded adhesive prestressed lattice type steel reinforced concrete beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106193452A (en) * | 2016-08-31 | 2016-12-07 | 济南市人防建筑设计研究院有限责任公司 | A kind of civil air defense constructions and installations groove type plate of built-in retarded adhesive prestressed steel bar |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2211465Y (en) * | 1994-04-08 | 1995-11-01 | 铁道部第一勘测设计院 | Slow coagulating prestressed concrete component |
| KR20110098886A (en) * | 2011-08-17 | 2011-09-02 | (주)에스앤씨산업 | Prestress steel composite panel with prestress non-introducing portions provided at both ends and manufacturing method thereof |
| MX2011007347A (en) * | 2009-01-08 | 2011-10-12 | Tarik Ali Abulaban | Reinforced load bearing structure. |
| CN202882219U (en) * | 2012-09-26 | 2013-04-17 | 同济大学 | Retard-bonded prestressed hollow steel reinforced concrete (SRC) beam |
-
2012
- 2012-02-20 CN CN2012100393533A patent/CN102561592A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2211465Y (en) * | 1994-04-08 | 1995-11-01 | 铁道部第一勘测设计院 | Slow coagulating prestressed concrete component |
| MX2011007347A (en) * | 2009-01-08 | 2011-10-12 | Tarik Ali Abulaban | Reinforced load bearing structure. |
| KR20110098886A (en) * | 2011-08-17 | 2011-09-02 | (주)에스앤씨산업 | Prestress steel composite panel with prestress non-introducing portions provided at both ends and manufacturing method thereof |
| CN202882219U (en) * | 2012-09-26 | 2013-04-17 | 同济大学 | Retard-bonded prestressed hollow steel reinforced concrete (SRC) beam |
Non-Patent Citations (2)
| Title |
|---|
| 幕光波等: "预应力空腹式钢骨混凝土梁极限承载力分析", 《山西建筑》 * |
| 王连广等: "预应力空腹式钢骨混凝土梁受弯性能研究", 《工程力学》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106193452A (en) * | 2016-08-31 | 2016-12-07 | 济南市人防建筑设计研究院有限责任公司 | A kind of civil air defense constructions and installations groove type plate of built-in retarded adhesive prestressed steel bar |
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Application publication date: 20120711 |