CN103469900A - Pre-stress carbon-fiber deformed steel bar strengthening structure for refrigeration storage structure nodes and method for producing strengthening structure - Google Patents
Pre-stress carbon-fiber deformed steel bar strengthening structure for refrigeration storage structure nodes and method for producing strengthening structure Download PDFInfo
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- CN103469900A CN103469900A CN2013104093284A CN201310409328A CN103469900A CN 103469900 A CN103469900 A CN 103469900A CN 2013104093284 A CN2013104093284 A CN 2013104093284A CN 201310409328 A CN201310409328 A CN 201310409328A CN 103469900 A CN103469900 A CN 103469900A
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Abstract
The invention relates to a pre-stress carbon-fiber deformed steel bar strengthening structure for refrigeration storage structure nodes and a method for producing the strengthening structure. Precast beams are arranged at precast columns to form refrigeration storage structure nodes. The strengthening structure is characterized in that pore passages are arranged in the precast columns and the precast beams, and precast metal sleeves and wedge-bond anchorages are arranged in the pore passages; pre-stress carbon-fiber deformed steel bars are arranged in the precast metal sleeves; high-damping silicone rubber concrete is poured in the precast metal sleeves; the wedge-bond anchorages are tubular metal cylinders and composed of anchor rings and wedges; the wedges clamp the precast metal sleeves and the inner pre-stress carbon-fiber deformed steel bars. The carbon-fiber deformed steel bars have the advantages of being light, high in strength, low-temperature and high-temperature resistant, anti-corrosion, anti-fatigue and the like; besides the high-damping silicone rubber concrete also has the advantages of being low-temperature resistant, so that assembly reinforced concrete storage structure nodes can be effectively strengthened, the structure wholeness can be enhanced, and the storage anti-seismic property can be improved. The method is suitable for being promoted and applied and provided with apparent social and economic benefits.
Description
Technical field
The pre-stressed carbon fiber indented bars that the present invention relates to a kind of panel-assembled cold store structure node is strengthened structure, and the pre-stressed carbon fiber indented bars of this freezer structure node is strengthened the construction preparation method of structure.Be particularly useful for the steel concrete base body structure under low temperature, effectively to strengthen structure node, strengthen the freezer globality, structural seismic performance is got a promotion.
Background technology
In recent years, domestic freezer is all to have obtained fast development aspect storage capacity or other, and past freezer major part concentrates on big and medium-sized cities, and townlet have also built many freezers now; The past freezer is that country builds, and some self-employed workers, collective also start to build now; The past freezer is often built market in, at source also starts now to build.These have all proved that Chinese freezer industry starts to take benign development as the leading factor with market.
When the Cold Storage Building form starts, take cast-in-placely as main, recently panel-assembled cold store starts fast development.The panel-assembled cold store quality is little, and compact conformation is installed fast, convenient, is subject to increasing user's favor.Since 20th century the mid-80, the panel-assembled cold store of the own design-build of China, that storage capacity is little is 10t, large can reach 5000t.In the face of the increasing panel-assembled cold store of storage capacity, the anti-seismic performance of freezer also more and more needs to be paid attention to.
Yet, at the assembled steel reinforced concrete cold library structure of antidetonation area application, have very large difficulty.The anti-seismic performance of assembled steel reinforced concrete storehouse body structure can not get improving always, and it is exactly the globality that being connected to of structure node affected the storehouse body structure to a certain extent that very large reason is arranged, and has reduced the anti-seismic performance of freezer.Therefore, widely popularize assembled steel reinforced concrete storehouse body structure, must be strengthened node.
Carbon fiber is a kind of special fibre mainly be comprised of carbon, and its phosphorus content is different and different with kind, generally more than 90%.Carbon fiber has the general character of general carbon materials, as high temperature resistant, low temperature resistant, wear-resisting wiping, conduction, heat conduction and corrosion-resistant etc., but different from general carbon materials, its profile has significant anisotropy, softness, can be processed into various fabrics, along the fiber axis direction, shows very high intensity.Carbon fiber proportion is little, and therefore very high specific strength is arranged.Carbon fiber is artificial chemical fibre higher by phosphorus content, not melting in heat treatment process, forms through the techniques such as thermally-stabilised oxidation processes, carbonization treatment and graphitization are refining.The predominant use of carbon fiber is compound with matrixes such as resin, metal, potteries, makes structural meterials.Carbon-fibre reinforced epoxy resin composite material, its specific strength, specific modulus are the highest in the existing structure material.The field that strict demand is arranged in intensity, rigidity, weight, fatigue properties etc., requiring high temperature, low temperature, occasion that chemical stability is high, and carbon fibre composite all has much advantage.
The carbon fiber indented bars is to adopt the multiply continuous carbon fibre as fortifying fibre, and thermosetting resin is as matrix material, by fortifying fibre and matrix resin gummed, by mould extruding, the fast curing-formed composite material of drawing of constant cross-section shape.Because the carbon fiber indented bars has the advantages such as lightweight, high-strength, corrosion-resistant, endurance, be suitable as very much presstressed reinforcing steel for severe corrosive environment.
Summary of the invention
The pre-stressed carbon fiber indented bars that the purpose of this invention is to provide a kind of panel-assembled cold store structure node is strengthened structure, and the pre-stressed carbon fiber indented bars of this freezer structure node is strengthened the construction preparation method of structure.This reinforcement mode utilizes the pre-stressed carbon fiber indented bars to apply prestressing force to the node of assembling storehouse body structure, can effectively strengthen the node of assembled steel reinforced concrete storehouse body structure, strengthens the globality of structure, improves the anti-seismic performance of storehouse body.
Completing the technical scheme that the foregoing invention task adopts is: a kind of pre-stressed carbon fiber indented bars of freezer structure node is strengthened structure, on the prefabricated post top, precast beam is set, form the freezer structure node, it is characterized in that, described prefabricated post and precast beam inside are provided with in ，Gai duct, duct and are provided with prefabricated metal sleeve and wedge-bond type anchorage; Be provided with the pre-stressed carbon fiber indented bars in this prefabricated metal sleeve; Also be cast with the high damping silicone rubber concrete in this prefabricated metal sleeve; The metal cylinder that described wedge-bond type anchorage is tubulose, be comprised of anchor ring, intermediate plate; Described intermediate plate clamps described prefabricated metal sleeve and inner pre-stressed carbon fiber indented bars thereof.
Anchoring principle of the present invention is: the pressure mainly applied on the prefabricated metal sleeve by intermediate plate produces clamping action, inject the high damping silicone rubber concrete in the prefabricated metal sleeve, clamp the prefabricated metal sleeve with intermediate plate again, apply lateral pressure to prefabricated metal sleeve, high damping silicone rubber concrete and pre-stressed carbon fiber indented bars, by the lateral pressure comprehensive function formation anchoring of the concrete bonding of high damping silicone rubber and intermediate plate.Prefabricated metal sleeve and high damping silicone rubber concrete have guaranteed that intermediate plate can not damage the pre-stressed carbon fiber indented bars, the screw thread of ring and the screw thread of pre-stressed carbon fiber indented bars in the serration of intermediate plate inboard, prefabricated metal sleeve, also guaranteed the inner good anchoring effect of ground tackle.And, because the high damping silicone rubber concrete has the characteristic of high damping, can improve the globality of structure, strengthen the anti-seismic performance of structural entity.
The present invention has following prioritization scheme:
1, described intermediate plate inboard is provided with serration;
2, described prefabricated metal sleeve lining is provided with interior ring screw thread;
3, the two ends of described pre-stressed carbon fiber indented bars are all stretched out one section from prefabricated metal sleeve oral area, and bend up an angle, facilitate common front clip type jack stretch-draw for two ends;
4, the prefabricated metal sleeve that in described precast beam, equipment is used, and the standby standby pre-stressed carbon fiber indented bars of prefabricated metal sleeve inner; For example: six prefabricated metal sleeves are arranged in each precast beam, can put into six groups of carbon fiber indented barss, on four angles that wherein four are evenly distributed on beam section, also have two and be distributed in middle, as after the loss of prestress in future, pre-stressed carbon fiber indented bars that stretch-draw is new.
5, in perpendicular, the prefabricated metal sleeve in each quadrature precast beam will stagger up and down, guarantees can pass through smoothly in the prefabricated metal sleeve of prefabricated post.
6, described intermediate plate is three, and 120 degree angles arrange each other.
The technical scheme that completes second invention task of the application is, the pre-stressed carbon fiber indented bars of above-mentioned freezer structure node is strengthened the construction preparation method of structure, it is characterized in that, step is as follows:
(1). in precast beam, precast production process, in precast beam, prefabricated post inside, duct is set;
(2). prefabricated metal sleeve and wedge-bond type anchorage are set in described duct;
(3). in described prefabricated metal sleeve, put into the carbon fiber indented bars;
(4). outer one section of prefabricated metal sleeve is all stretched out at the two ends of described carbon fiber indented bars, and bends up an angle;
(5). with front clip type jack, stretch-draw is carried out in the two ends of carbon fiber indented bars, form prestressing force;
(6). from one end to the other side inject the high damping silicone rubber concrete in the prefabricated metal sleeve;
(7). after the high damping silicone rubber hardening of concrete, then clamp the prefabricated metal sleeve with intermediate plate, produce lateral pressure and carry out anchoring;
(8). form the pre-stressed carbon fiber indented bars after removing jack.
In prioritization scheme, increase of the present invention has following steps:
(1)-1., in precast beam, precast production process, in precast beam, prefabricated post inside, standby duct is set;
(2)-1. in described standby duct, standby prefabricated metal sleeve and standby wedge-bond type anchorage are set;
(3)-1., in described standby prefabricated metal sleeve, put into standby carbon fiber indented bars;
(4)-1. outer one section of prefabricated metal sleeve is all stretched out at the two ends of described standby carbon fiber indented bars, and bends up an angle;
Described step (1)-1, (2)-2, (3)-3, (4)-1, can be respectively in step (1), (2), (3), carry out after (4), also can be respectively with step (1), (2), (3), (4) carry out simultaneously.
After the loss of prestress of described pre-stressed carbon fiber indented bars, carry out following steps:
(9). with front clip type jack, stretch-draw is carried out in the two ends of standby carbon fiber indented bars, form prestressing force;
(10). from one end to the other side inject the high damping silicone rubber concrete in standby prefabricated metal sleeve;
(11). after the high damping silicone rubber hardening of concrete, then clamp standby prefabricated metal sleeve with standby intermediate plate, produce lateral pressure and carry out anchoring;
(12). form new pre-stressed carbon fiber indented bars after removing jack.
In other words, in the present invention, this joint strengthening mode comprises pre-stressed carbon fiber indented bars, prefabricated metal sleeve (interior ring has screw thread), wedge-bond type anchorage, high damping silicone rubber concrete, anchor ring, intermediate plate.Wherein, in precast beam, column production process, wedge-bond type anchorage and prefabricated metal sleeve are put into to assigned address.Precast beam, prefabricated post is assembled complete after, by the prefabricated metal sleeve, put into the carbon fiber indented bars, two ends are all stretched out one section carbon fiber indented bars and are bent up an angle, facilitate common front clip type jack stretch-draw for two ends, make the carbon fiber indented bars form prestressing force, from one end to the other side inject the high damping silicone rubber concrete in the prefabricated metal sleeve, after the high damping silicone rubber hardening of concrete, clamp the prefabricated metal sleeve with intermediate plate again, produce lateral pressure and also carry out anchoring, form the pre-stressed carbon fiber indented bars after removing jack.Six prefabricated metal sleeves are arranged in each precast beam, can put into six groups of carbon fiber indented barss, on four angles that wherein four are evenly distributed on beam section, also have two and be distributed in middle, as after the loss of prestress in future, pre-stressed carbon fiber indented bars that stretch-draw is new.Simultaneously, in perpendicular, the prefabricated metal sleeve of quadrature precast beam will stagger up and down, guarantees can pass through smoothly in the prefabricated metal sleeve of prefabricated post.
The metal cylinder that wedge-bond type anchorage is tubulose, by anchor ring, intermediate plate, formed, inject the high damping silicone rubber concrete in metal sleeve, wherein a part of power is passed to metal sleeve by the concrete adhesion stress of high damping silicone rubber, and carry out anchoring by the comprehensive function of bonding and intermediate plate lateral pressure, anchoring effect is fine, and can be used for many nonmetal presstressed reinforcing steels of anchoring.After the stretch-draw of pre-stressed carbon fiber indented bars, each cross section to beam and column has applied pressure, and avoid precast beam to be subject to excessive concentrated force by wedge-bond type anchorage, thereby the power of pre-stressed carbon fiber indented bars is passed to precast beam by ground tackle comparatively dispersedly.The position of wedge-bond type anchorage is located in precast beam, stretches out one section carbon fiber indented bars outside beam, and the carbon fiber indented bars is bent up to an angle, facilitates jack tension carbon fiber indented bars, and use the ground tackle anchoring after stretch-draw.Therefore the pre-stressed carbon fiber indented bars can apply precompression to precast beam rod structure node by ground tackle, plays the effect of reinforcement, and can give full play to the advantage that the concrete anti-compression ability is stronger.
The pre-stressed carbon fiber indented bars, can exert pressure to the cross section of beam and column, and to structure node, place applies prestressing force, also utilizes the screw thread of ring in indented bars and metal sleeve, increases and the concrete adhesion of high damping silicone rubber.These characteristics have been strengthened the globality of structure Nodes, also bring into play the advantage that the concrete anti-compression ability is strong.And the carbon fiber indented bars has the advantages such as low temperature resistant, high temperature resistant, corrosion-resistant, endurance, the high damping silicone rubber concrete of filling also has good low temperature resistant characteristics, is applicable to the particular surroundings of freezer simultaneously.
Beneficial effect: around existing panel-assembled cold store structure node, apply prestressing force by the pre-stressed carbon fiber indented bars to the freezer bean column node, improved the poor problem of existing panel-assembled cold store structure node switching performance, strengthen the globality of panel-assembled cold store structure, improved the anti-seismic performance of structure node.And the carbon fiber indented bars has the advantages such as lightweight, high-strength, low temperature resistant, high temperature resistant, corrosion-resistant, endurance, and the high damping silicone rubber concrete also has low temperature resistant characteristics, is suitable for the required particular surroundings of freezer.Can effectively strengthen the node of assembled steel reinforced concrete storehouse body structure, strengthen the globality of structure, improve the anti-seismic performance of storehouse body.Along with the popularization of prefabricated costruction and pay attention to day by day and the fast development of industrialization of construction industry, the method that this pre-stressed carbon fiber indented bars is strengthened the freezer structure node will obtain engineering application widely, produces significant economic results in society.
the accompanying drawing explanation:
Freezer structure node cross-section front view after Fig. 1 adopts the pre-stressed carbon fiber indented bars to strengthen;
Freezer structure node top view after Fig. 2 adopts the pre-stressed carbon fiber indented bars to strengthen;
Fig. 3 wedge-bond type anchorage elevation;
Fig. 4 wedge-bond type anchorage left view;
Fig. 5 precast beam cross-section front view.
The specific embodiment
Embodiment 1, the pre-stressed carbon fiber indented bars of panel-assembled cold store structure node is strengthened structure, and referring to Fig. 1-Fig. 5: this joint strengthening mode comprises pre-stressed carbon fiber indented bars 1, prefabricated metal sleeve 2, wedge-bond type anchorage 3, high damping silicone rubber concrete 4, anchor ring 5, intermediate plate 6.In precast beam, column production process, at assigned address, put into wedge-bond type anchorage 3 and prefabricated metal sleeve 2.Complete precast beam, prefabricated post assembled after, put into carbon fiber indented bars 1 in prefabricated metal sleeve 2, carbon fiber indented bars 1 two ends are stretched out precast beam and are bent up an angle, facilitate at two ends with common front clip type jack stretch-draw, make carbon fiber indented bars 1 form prestressing force, low temperature resistant high damping silicone rubber concrete 4 is injected to prefabricated metal sleeves 2 simultaneously, wait 4 sclerosis of high damping silicone rubber concrete to clamp prefabricated metal sleeve 2 with intermediate plate 6 afterwards, unclamp jack.In top view, the prefabricated metal sleeve 2 of quadrature precast beam will stagger up and down, guarantees can pass through smoothly in the prefabricated metal sleeve 2 of prefabricated post.Wedge-bond type anchorage 3 is comprised of anchor ring 5, intermediate plate 6,3 of intermediate plate quantity, intermediate plate is with serration, the pressure that the anchoring principle mainly applies on prefabricated metal sleeve 2 by intermediate plate produces clamping action, at the interior injection high damping silicone rubber of prefabricated metal sleeve 2 concrete 4, clamp prefabricated metal sleeve 2 with intermediate plate 6 again, apply lateral pressure to prefabricated metal sleeve 2, high damping silicone rubber concrete 4 and pre-stressed carbon fiber indented bars 1, by the bonding of high damping silicone rubber concrete 4 and the lateral pressure comprehensive function of intermediate plate 6, form anchoring.Prefabricated metal sleeve 2 and high damping silicone rubber concrete 4 have guaranteed that intermediate plate 6 can not damage pre-stressed carbon fiber indented bars 1, the screw thread of the serration of intermediate plate 6 inboards, prefabricated metal sleeve 2 interior rings and the screw thread of pre-stressed carbon fiber indented bars 1, also guaranteed the inner good anchoring effect of ground tackle.And, because high damping silicone rubber concrete 4 has the characteristic of high damping, can improve the globality of structure, strengthen the anti-seismic performance of structural entity.
Claims (6)
1. the pre-stressed carbon fiber indented bars of a freezer structure node is strengthened structure, on the prefabricated post top, precast beam is set, forms the freezer structure node, it is characterized in that, described prefabricated post and precast beam inside are provided with in ，Gai duct, duct and are provided with prefabricated metal sleeve and wedge-bond type anchorage; Be provided with the pre-stressed carbon fiber indented bars in this prefabricated metal sleeve; Also be cast with the high damping silicone rubber concrete in this prefabricated metal sleeve; The metal cylinder that described wedge-bond type anchorage is tubulose, be comprised of anchor ring, intermediate plate; Described intermediate plate clamps described prefabricated metal sleeve and inner pre-stressed carbon fiber indented bars thereof.
2. the pre-stressed carbon fiber indented bars of freezer structure node according to claim 1 is strengthened structure, it is characterized in that, described intermediate plate inboard is provided with serration, and intermediate plate is three, and 120 degree angles arrange each other; The prefabricated metal sleeve lining is provided with interior ring screw thread; The two ends of pre-stressed carbon fiber indented bars are all stretched out one section from prefabricated metal sleeve oral area, and bend up an angle, facilitate common front clip type jack stretch-draw for two ends; The prefabricated metal sleeve that in precast beam, equipment is used, and the standby standby pre-stressed carbon fiber indented bars of prefabricated metal sleeve inner.
3. the pre-stressed carbon fiber indented bars of freezer structure node according to claim 2 is strengthened structure, it is characterized in that, in described precast beam, the set-up mode of prefabricated metal sleeve is: six prefabricated metal sleeves are arranged in each precast beam, put into respectively six groups of carbon fiber indented barss, on four angles that wherein four are evenly distributed on beam section, also have two be distributed in middle, as after the loss of prestress in future, the pre-stressed carbon fiber indented bars that stretch-draw is new.
4. strengthen structure according to the pre-stressed carbon fiber indented bars of claim 1 or 2 or 3 described freezer structure nodes, it is characterized in that, in perpendicular, the prefabricated metal sleeve in each quadrature precast beam will stagger up and down, guarantees can pass through smoothly in the prefabricated metal sleeve of prefabricated post.
5. the pre-stressed carbon fiber indented bars of freezer structure node claimed in claim 1 is strengthened the construction preparation method of structure, it is characterized in that, step is as follows:
(1). in precast beam, precast production process, in precast beam, prefabricated post inside, duct is set;
(2). prefabricated metal sleeve and wedge-bond type anchorage are set in described duct;
(3). in described prefabricated metal sleeve, put into the carbon fiber indented bars;
(4). outer one section of prefabricated metal sleeve is all stretched out at the two ends of described carbon fiber indented bars, and bends up an angle;
(5). with front clip type jack, stretch-draw is carried out in the two ends of carbon fiber indented bars, form prestressing force;
(6). from one end to the other side inject the high damping silicone rubber concrete in the prefabricated metal sleeve;
(7). after the high damping silicone rubber hardening of concrete, then clamp the prefabricated metal sleeve with intermediate plate, produce lateral pressure and carry out anchoring;
(8). form the pre-stressed carbon fiber indented bars after removing jack.
6. the pre-stressed carbon fiber indented bars of freezer structure node according to claim 5 is strengthened the construction preparation method of structure, it is characterized in that, increases following steps are arranged:
(1)-1., in precast beam, precast production process, in precast beam, prefabricated post inside, standby duct is set;
(2)-1. in described standby duct, standby prefabricated metal sleeve and standby wedge-bond type anchorage are set;
(3)-1., in described standby prefabricated metal sleeve, put into standby carbon fiber indented bars;
(4)-1. outer one section of prefabricated metal sleeve is all stretched out at the two ends of described standby carbon fiber indented bars, and bends up an angle;
Described step (1)-1, (2)-2, (3)-3, (4)-1, respectively in step (1), (2), (3), carry out after (4), or respectively with step (1), (2), (3), (4) carry out simultaneously;
After the loss of prestress of described pre-stressed carbon fiber indented bars, carry out following steps:
(9). with front clip type jack, stretch-draw is carried out in the two ends of standby carbon fiber indented bars, form prestressing force;
(10). from one end to the other side inject the high damping silicone rubber concrete in standby prefabricated metal sleeve;
(11). after the high damping silicone rubber hardening of concrete, then clamp standby prefabricated metal sleeve with standby intermediate plate, produce lateral pressure and carry out anchoring;
(12). form new pre-stressed carbon fiber indented bars after removing jack.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310409328.4A CN103469900B (en) | 2013-09-10 | 2013-09-10 | Pre-stress carbon-fiber deformed steel bar strengthening structure for refrigeration storage structure nodes and method for producing strengthening structure |
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| CN201310409328.4A CN103469900B (en) | 2013-09-10 | 2013-09-10 | Pre-stress carbon-fiber deformed steel bar strengthening structure for refrigeration storage structure nodes and method for producing strengthening structure |
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| CN103469900B CN103469900B (en) | 2015-06-24 |
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Cited By (3)
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| CN103924681A (en) * | 2014-04-14 | 2014-07-16 | 北京工业大学 | Prestress connected precast concrete beam rectangular steel tube concrete column node |
| CN107756895A (en) * | 2017-10-23 | 2018-03-06 | 江阴市蒋氏汽摩部件有限公司 | A kind of graden machine drag-line and preparation method thereof |
| CN108331259A (en) * | 2018-01-30 | 2018-07-27 | 沈阳建筑大学 | The wedge-shaped intermediate plate anchor head of major diameter high tensile reinforcement for reinforced concrete beam column node and application |
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| CN108331259A (en) * | 2018-01-30 | 2018-07-27 | 沈阳建筑大学 | The wedge-shaped intermediate plate anchor head of major diameter high tensile reinforcement for reinforced concrete beam column node and application |
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| CN103469900B (en) | 2015-06-24 |
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