CN2752372Y - Finit cohesive steel strand for integrated prestress assembling plate-column structure - Google Patents
Finit cohesive steel strand for integrated prestress assembling plate-column structure Download PDFInfo
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- CN2752372Y CN2752372Y CN 200420061436 CN200420061436U CN2752372Y CN 2752372 Y CN2752372 Y CN 2752372Y CN 200420061436 CN200420061436 CN 200420061436 CN 200420061436 U CN200420061436 U CN 200420061436U CN 2752372 Y CN2752372 Y CN 2752372Y
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Abstract
The utility model relates to a limited cohesive steel strand for an integrated prestressed assembling type plate-column structure, which is composed of a steel strand 1, an anchorage zone concrete 2, a limited cohesive material 3 and a protective zone concrete 4. The utility model has the construction process that the construction positioning steel strand is divided into three sections, the middle section forms a limited cohesive protective zone, and the steel strand is wrapped by the limited cohesive material to form a limited cohesive steel strand; both ends form the anchorage zones, and use method of the cohesive steel strand. On the basis of comprehensive utilization of advantages of cohesive steel strand and a non-cohesive steel strand, the utility model further improves the shock resistance of the structure, the structure is easy to remove, constructional elements can be repeatedly used and the utility model is a technique which conforms to requirements of sustainable development.
Description
One, technical field: the utility model belongs to construction engineering technical field.
Two, background technology: the existing high strength steel strand that is used for prestressed structure is divided into two kinds: a kind of for the bonding steel strand are arranged; steel strand penetrate lays bellows in place; build the agent structure concrete; treat that concrete strength reaches the designing requirement post-tensioning steel strand, apply prestressing force, then grout injection in bellows; its objective is the protection steel strand; in order to avoid corrosion, and make steel strand and concrete component that effective adhesive be arranged, alleviate the load of beam-ends ground tackle.Another kind is a non-bending steel cable, and it make to adopt extruding plastic spraying, outsourcing polyethylene or polypropylene sleeve pipe, in be coated with anticorrosion building grease, through behind the extrusion shaping machine, the one-shot forming of plastic wraps layer is on steel strand.Compare with the bonding steel strand are arranged, non-bending steel cable need not pre-buried bellows in work progress, has also saved the operation to the ripple ipe grout, and efficiency of construction is higher.
Traditional integrated prestress assembling slab column system adopts has the bonding steel strand as prestressed reinforcement, but construction technology has the steel strand of bonding different with above-mentioned.Steel strand are laid immediately in the open channel between the prefabricated units, after treating that steel strand tension finishes, directly build high strength micro expansion pea gravel concreten in open channel, concrete bonds with steel strand surface in hardening process, the two can not relatively move, and is formed with the bonding steel strand.
The IMS system adopts has the bonding steel strand to have the following disadvantages:
When 1, existing structure may produce displacement greatly bearing geological process, the presstressed reinforcing steel distortion concentrates on seam mortar place, can not be evenly distributed on the presstressed reinforcing steel total length, cause presstressed reinforcing steel to lose prestressing force easily, make structure produce the destruction that to repair in the surrender of seam mortar place.The above-mentioned shortcoming of bonded prestress, existing integrated prestress assembling slab column system must not more than spending, be used in the area seismic fortification intensity nine degree and nine, even in low intensity area, generally also require to be provided with lateral resistant member such as shear wall, cause cost to increase, difficulty of construction strengthens, and has limited the use of " integrated prestress assembling slab column system " this industrialization system in the earthquake zone;
2, after bonded prestressed tendon applies prestressing force, be in high-stress state, it applied protection, avoid it under air and water function, to corrode by concreting in open channel.Do not note slightly during construction, bonded prestressed tendon just might produce rust staining and cause stress to be concentrated, make presstressed reinforcing steel destruction and lose supporting capacity, therefore, existing system is very strict to selecting for use of above-mentioned construction link and material, is unfavorable for applying in townlet's building, villages and small towns building and local-style dwelling houses upgrade;
3, reusing the member of the building of having removed, is the effective ways of energy conservation and material consumption, meets the requirement of sustainable development.But bonding integrated prestress assembling slab column system is arranged when removing, must destroy member and presstressed reinforcing steel and agent structure could be taken apart, the member recycling rate of waterused is low, waste material, and produce nondegradable building waste.
Non-bending steel cable has the efficiency of construction height, the advantage of good seismic performance.Under seismic load acted on repeatedly, unbonded prestressing tendon was in tension state all the time, may transfer pressurized to by tension unlike bonded prestressed tendon.There are grease and plastic bushing isolated between unbonded prestressing tendon and the concrete, after its prestressing force unloading, can extract unbonded prestressing tendon out sleeve pipe, and then all prefabricated units of undamaged dismounting (beam, plate, post, cushion block etc.), these members can be reused, and effectively energy conservation and material consumption reduces generation of waste, this is significant for the destruction of reducing natural ecosystems, minimizing environment pollution, meets the requirement of sustainable development.But, because whole prestressing force loads of non-bending steel cable are all born by end anchorage, in case ground tackle lost efficacy, total collapses on earth one, Just because of this, country's existing " Code for design of concrete structures " regulation: the Vierendeel girder of earthquake resistant structure should adopt the post-tensioning prestress with bond reinforcing bar, so non-bending steel cable can not be used for integrated prestress assembling slab column system.
Three, summary of the invention:
1, purpose: the utility model intends overcoming the deficiency of prior art, and comprehensive utilization has the two advantage of bonding steel strand and non-bending steel cable, overcomes its shortcoming, proposes to be used for the limited bonding steel strand technology of integrated prestress assembling slab column system.
2; technical scheme: the limited bonding steel strand that the design relates to are by steel strand 1; anchorage zone concrete 2; limited binding material 3; limited bond regions concrete 4 is formed; cooperate prefabricated side bar 5; prefabricated cushion block 6; precast floor slab 7; prefabricated post 8 is formed limited bonding integrated prestress assembling slab column system; it is characterized in that being divided into three sections with laying steel strand in place; interlude is limited bond regions (urban conservation area); two end portions is the anchorage zone; on steel strand in place 1, make marks; the anchorage zone is located in its termination, two ends 1500mm scope; make firm by ramming with anchorage zone concrete 2; evenly coat limited binding material 3 at the steel strand surface of limited bond regions; coating layer thickness is controlled between 3～5 millimeters, makes firm by ramming with limited bond regions concrete 4.Anchorage zone 2 concrete guarantee that steel strand 1 and concrete generation have effective adhesive, alleviate the load of beam-ends ground tackle, and the steel strand that are positioned at this zone are for there being the bonding steel strand; Limited binding material 3 is viscoelastic materials of hydrophobicity, be coated on the surface of steel strand, this material allows steel strand 1 and concrete 4 to relatively move, but must overcome certain viscous drag in the moving process, be different from non-bending steel cable moving freely in the duct, its character neither not have bonding neither bonding is arranged, but limited bonding.
Its concrete job practices is as follows:
(1), with prefabricated post, precast floor slab, prefabricated cushion block and prefabricated side bar hoisted in position, between precast plate and the precast plate, form open channel between precast plate and the prefabricated side bar, the preformed hole that steel strand are penetrated on prefabricated post and the prefabricated cushion block is laid in the open channel;
(2), seam is closely knit with high-early-strength microdilatancy filled with mortar, maintenance;
(3), on steel strand in place, make marks, the anchorage zone is located in its termination, two ends 1500mm scope, and remainder is limited bond regions;
(4), limited binding material is evenly coated in the steel strand surface that is positioned at limited bond regions, coating layer thickness is controlled between 3～5 millimeters;
(5), treat that the seam mortar reaches design strength after, the stretch-draw steel strand apply prestressing force to structure;
(6), behind the stretch-draw end-of-job, earlier the preformed hole on the prefabricated units is implemented grouting, grouting agent is the micro-expansion cement mortar, then, and pea gravel concreten and maintenance in the pouring open channel;
(7), in open channel in the pea gravel concreten hardening process, steel strand become in the anchorage zone the bonding steel strand, the steel strand of limited bond regions become limited bonding steel strand.
3, the advantage of limited bonding steel strand:
(1) owing to the existence of anchorage zone, the structural reliability of limited bonding steel strand has been not less than the bonding steel strand;
(2) anti-seismic performance is good.Under seismic load acted on repeatedly, limited binding prestress reinforcement STRESS VARIATION amplitude was little, and local distortion can be evenly spread in the whole limited bond regions of presstressed reinforcing steel; Simultaneously, because the damping action of limited binding material can consume part energy in deformation process, improved the energy-dissipating and shock-absorbing ability of structural system;
(3) because the existence of the limited binding material of steel strand surface has reduced the friction factor of steel strand at backfin point place, reduced the loss of prestress of steel strand;
(4) can adopt electrical heating method to eliminate the prestressing force of steel strand, building is easy to remove, and building unit can reuse.In the electrical heating process, effectively binding material heats up softening, adhesion stress reduces, when cutting off steel strand with cutting machine, the energy of containing in the steel strand can thoroughly be discharged, and not only can be removed agent structure under the prerequisite of not destroying prefabricated units, dismounting work is also safer, member recycling rate of waterused height, building waste is few, meets the sustainable development requirement;
(5) limited binding material has hydrophobicity, can effectively prevent the steel strand corrosion, and structural reliability is higher.Limited binding material has certain elasticity, can commensurate structure distortion, in case overcome bonding steel strand concrete cracking is arranged, steel strand are easy to the drawback of corrosion with regard to directly being exposed in the air;
(6) limited binding material can be selected pitch for use, and is cheap, and material is easy to get, and cost is lower than non-bending steel cable, less demanding to construction equipment.
Four, description of drawings:
Fig. 1 surveys schematic diagram for the integrated prestress assembling slab column system axle that adopts limited bonding steel strand, and 1 is steel strand among the figure, and the 5th, prefabricated side bar, the 6th, prefabricated cushion block, the 7th, precast floor slab, the 8th, prefabricated post; Fig. 2 is the I-I sectional view of Fig. 1, is limited bonding steel strand organigram in the open channel, the 1st, and steel strand, the 2nd, anchorage zone concrete, the 3rd, limited binding material, the 4th, limited bond regions concrete.A is the anchorage zone, and B is limited bond regions.
Five, the specific embodiment:
The implementation process of the integrated prestress assembling slab column system of limited bonding steel strand is as follows:
1, with prefabricated post, precast floor slab, prefabricated cushion block and prefabricated side bar hoisted in position, between precast plate and the precast plate, form open channel between precast plate and the prefabricated side bar, form seam between prefabricated cushion block, prefabricated post and precast floor slab, the prefabricated side bar, seam is closely knit with high-early-strength microdilatancy filled with mortar, maintenance;
2, treat that the seam mortar reaches design strength after, the preformed hole that steel strand are penetrated on prefabricated post and the prefabricated cushion block is laid in the open channel;
3, make marks on steel strand in place, the anchorage zone is located in its termination, two ends 1500mm scope, and remainder is limited bond regions (urban conservation area);
4, limited binding material is evenly coated in the steel strand surface that is positioned at limited bond regions, coating layer thickness is controlled between the 3-5 millimeter;
5, the stretch-draw steel strand apply prestressing force to structure;
6, behind the stretch-draw end-of-job, earlier the preformed hole on the prefabricated units is implemented grouting, grouting agent is the micro-expansion cement mortar, then, and pea gravel concreten and maintenance in the pouring open channel;
7, in open channel in the pea gravel concreten hardening process, steel strand become in the anchorage zone the bonding steel strand, and the steel strand in the limited bond regions (urban conservation area) are limited bonding steel strand;
8, remove support, adopt the integrated prestress assembling slab column system construction of limited bonding steel strand to finish.
Claims (1)
1, a kind of limited bonding steel strand that are used for integrated prestress assembling slab column system, it is by steel strand (1), prefabricated side bar (5), prefabricated cushion block (6), precast floor slab (7), steel strand (1) construction in the assembling slab column system that prefabricated post (8) constitutes forms, precast floor slab, prefabricated cushion block and prefabricated side bar hoisted in position, between precast plate and the precast plate, form open channel between precast plate and the prefabricated side bar, the preformed hole that steel strand (1) are penetrated on prefabricated post and the prefabricated cushion block is laid in the open channel, seam is closely knit with filled with mortar, maintenance, it is characterized in that: will lay steel strand in place and be divided into three sections, two end portions is the anchorage zone, remainder is limited bond regions, the anchorage zone is located in the part 1500mm scope of its two ends, make firm by ramming with anchorage zone concrete (2), evenly coat limited binding material (3) at the steel strand surface of limited bond regions, coating layer thickness is controlled at 3～5 millimeters, makes firm by ramming with limited bond regions concrete (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420061436 CN2752372Y (en) | 2004-09-23 | 2004-09-23 | Finit cohesive steel strand for integrated prestress assembling plate-column structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420061436 CN2752372Y (en) | 2004-09-23 | 2004-09-23 | Finit cohesive steel strand for integrated prestress assembling plate-column structure |
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| CN2752372Y true CN2752372Y (en) | 2006-01-18 |
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| CN 200420061436 Expired - Lifetime CN2752372Y (en) | 2004-09-23 | 2004-09-23 | Finit cohesive steel strand for integrated prestress assembling plate-column structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403257B (en) * | 2008-11-18 | 2011-09-14 | 昆明理工大学 | Nondestructive demounting method for prefabricated part of IMS system Dai nationality folk house major structure |
| CN106245537A (en) * | 2016-09-28 | 2016-12-21 | 天津银龙高科新材料研究院有限公司 | A kind of compressor wire beam device |
| CN106258555A (en) * | 2016-07-28 | 2017-01-04 | 龙信建设集团有限公司 | Prefabricated assembled greening flower pond construction method for hanging |
| CN109235733A (en) * | 2018-10-16 | 2019-01-18 | 北京工业大学 | A kind of assembled plate column structure using prestressed steel bar and the anti-buckling support of inner core bending-type |
| CN110206143A (en) * | 2019-05-10 | 2019-09-06 | 中建八局第二建设有限公司 | A kind of construction method of post-stressed assembly concrete frame structure |
-
2004
- 2004-09-23 CN CN 200420061436 patent/CN2752372Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403257B (en) * | 2008-11-18 | 2011-09-14 | 昆明理工大学 | Nondestructive demounting method for prefabricated part of IMS system Dai nationality folk house major structure |
| CN106258555A (en) * | 2016-07-28 | 2017-01-04 | 龙信建设集团有限公司 | Prefabricated assembled greening flower pond construction method for hanging |
| CN106245537A (en) * | 2016-09-28 | 2016-12-21 | 天津银龙高科新材料研究院有限公司 | A kind of compressor wire beam device |
| CN109235733A (en) * | 2018-10-16 | 2019-01-18 | 北京工业大学 | A kind of assembled plate column structure using prestressed steel bar and the anti-buckling support of inner core bending-type |
| CN110206143A (en) * | 2019-05-10 | 2019-09-06 | 中建八局第二建设有限公司 | A kind of construction method of post-stressed assembly concrete frame structure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090320 Address after: 27 South Village, Kunming City, Yunnan Province, China: 650011 Patentee after: Yunnan General Construction Engineering Contract Company Address before: No. 253, Xuefu Road, Kunming, Yunnan Province: 650031 Patentee before: Kunming University of Science and Technology |
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| ASS | Succession or assignment of patent right |
Owner name: YUNNAN PROV ENGINEERING CONSTRUCTION GENERAL CONTR Free format text: FORMER OWNER: KUMING UNIV. OF SCIENCE AND ENGINEERING Effective date: 20090320 |
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140923 Granted publication date: 20060118 |