CN103469900B - 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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- CN103469900B CN103469900B CN201310409328.4A CN201310409328A CN103469900B CN 103469900 B CN103469900 B CN 103469900B CN 201310409328 A CN201310409328 A CN 201310409328A CN 103469900 B CN103469900 B CN 103469900B
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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
Structure strengthened by the pre-stressed carbon fiber indented bars that the present invention relates to a kind of panel-assembled cold store structure node, and the construction preparation method of structure strengthened by the pre-stressed carbon fiber indented bars of this freezer structure node.Be particularly useful for the steel concrete base body structure under low temperature, effectively to strengthen structure node, strengthen freezer globality, structural seismic performance is got a promotion.
Background technology
In recent years, domestic freezer all obtains fast development in storage capacity or other, and past freezer major part concentrates on big and medium-sized cities, and townlet have also built many freezers now; Past freezer is that country builds, and some self-employed workers, collective also start to build now; Past freezer often build market in, at source also starts now to build.These freezer industries all demonstrating China start to take benign development as the leading factor with market.
Based on cast-in-place when Cold Storage Building form starts, nearest panel-assembled cold store starts fast development.Panel-assembled cold store quality is little, compact conformation, and it is quick, convenient to install, and is subject to the favor of increasing user.From 20th century the mid-80s, the panel-assembled cold store of China oneself design-build, that storage capacity is little is 10t, and large can reach 5000t.In the face of the panel-assembled cold store that storage capacity is increasing, the anti-seismic performance of freezer also more and more needs to be paid attention to.
But, 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, have very large reason be exactly structure node be connected to the globality that have impact on storehouse body structure to a certain extent, reduce the anti-seismic performance of freezer.Therefore, assembled steel reinforced concrete storehouse body structure be widelyd popularize, must strengthen node.
Carbon fiber is a kind of special fibre primarily of carbon composition, and its phosphorus content is different with kind difference, generally more than 90%.Carbon fiber has the general character of general carbon materials, as high temperature resistant, low temperature resistant, abrasion-resistant, conduction, heat conduction and corrosion-resistant etc., but with general carbon materials unlike, its profile has significant anisotropy, softness, can be processed into various fabric, shows very high intensity along fiber axis direction.Carbon fiber proportion is little, therefore has very high specific strength.Carbon fiber is manufactured chemical's fiber that is higher by phosphorus content, not melting in heat treatment process, refines through techniques such as thermally-stabilised oxidation processes, carbonization treatment and graphitizations.The predominant use of carbon fiber is and the matrix compounds such as resin, metal, pottery make structural meterials.Carbon-fibre reinforced epoxy resin composite material, its specific strength, specific modulus are the highest in existing structure material.Have the field of strict demand in intensity, rigidity, weight, fatigue properties etc., requiring the occasion that high temperature, low temperature, chemical stability are high, carbon fibre composite all has much advantage.
Carbon fiber indented bars adopts multiply continuous carbon fibre as fortifying fibre, and fortifying fibre and matrix resin, as matrix material, glue together, by the composite material that mould extrudes, drawing is fast curing-formed of constant cross-section shape by thermosetting resin.Because carbon fiber indented bars has the advantages such as lightweight, high-strength, corrosion-resistant, endurance, be suitable as very much presstressed reinforcing steel in severe corrosive environment.
Summary of the invention
Structure strengthened by the pre-stressed carbon fiber indented bars that the object of this invention is to provide a kind of panel-assembled cold store structure node, and the construction preparation method of structure strengthened by the pre-stressed carbon fiber indented bars of this freezer structure node.This reinforcement mode utilizes pre-stressed carbon fiber indented bars to the node Shi Hanzhang of assembling storehouse body structure, effectively can 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 foregoing invention task adopts is: structure strengthened by a kind of pre-stressed carbon fiber indented bars of freezer structure node, on prefabricated post top, precast beam is set, form freezer structure node, it is characterized in that, described prefabricated post and precast beam inside are provided with duct, are provided with prefabricated metal sleeve and wedge-bond type anchorage in this duct; Pre-stressed carbon fiber indented bars is provided with in this prefabricated metal sleeve; High damping silicone rubber concrete is also cast with in this prefabricated metal sleeve; Described wedge-bond type anchorage is the metal cylinder of tubulose, is made up of anchor ring, intermediate plate; Described intermediate plate clamps described prefabricated metal sleeve and the pre-stressed carbon fiber indented bars of inside thereof.
Anchoring principle of the present invention is: the main pressure applied on prefabricated metal sleeve by intermediate plate produces clamping action, high damping silicone rubber concrete is injected in prefabricated metal sleeve, prefabricated metal sleeve is clamped again with intermediate plate, apply lateral pressure to prefabricated metal sleeve, high damping silicone rubber concrete and pre-stressed carbon fiber indented bars, form anchoring by the lateral pressure comprehensive function of the concrete bonding of high damping silicone rubber and intermediate plate.Prefabricated metal sleeve and high damping silicone rubber concrete ensure that intermediate plate can not damage pre-stressed carbon fiber indented bars, serration inside intermediate plate, the screw thread of prefabricated metal sleeve inner ring and the screw thread of pre-stressed carbon fiber indented bars, also ensure that the anchoring effect that ground tackle is inner good.And have the characteristic of high damping due to high damping silicone rubber concrete, the globality of structure can be improved, strengthen the anti-seismic performance of structural entity.
The present invention has following prioritization scheme:
1, serration is provided with inside described intermediate plate;
2, described prefabricated metal sleeve lining is provided with inner ring screw thread;
The two ends of 3, described pre-stressed carbon fiber indented bars all stretch out one section from prefabricated metal sleeve oral area, and bend up an angle, facilitate the common front clip type jack stretch-draw in two ends;
4, the prefabricated metal sleeve of equipment in described precast beam, and the pre-stressed carbon fiber indented bars that prefabricated metal sleeve inner for subsequent use is for subsequent use; Such as: in each precast beam, have six prefabricated metal sleeves, can put into six groups of carbon fiber indented barss, wherein four are evenly distributed on four angles of beam section, also have two and are distributed in middle, as after 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 orthogonal precast beam will stagger up and down, ensures pass through smoothly in the prefabricated metal sleeve of prefabricated post.
6, described intermediate plate is three, and 120 degree of angles are arranged each other.
The technical scheme completing the application's second invention task is, the construction preparation method of structure strengthened by the pre-stressed carbon fiber indented bars of above-mentioned freezer structure node, and it is characterized in that, step is as follows:
(1). in precast beam, precast production process, duct is set in precast beam, prefabricated post inside;
(2). prefabricated metal sleeve and wedge-bond type anchorage are set in described duct;
(3). in described prefabricated metal sleeve, put into 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 to the two ends of carbon fiber indented bars, form prestressing force;
(6). in prefabricated metal sleeve, from one end to the other side inject high damping silicone rubber concrete;
(7). after high damping silicone rubber hardening of concrete, then clamp prefabricated metal sleeve with intermediate plate, produce lateral pressure and carry out anchoring;
(8). form 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, arranges duct for subsequent use in precast beam, prefabricated post inside;
(2)-1. prefabricated metal sleeve for subsequent use and wedge-bond type anchorage for subsequent use are set in described duct for subsequent use;
(3)-1. in described prefabricated metal sleeve for subsequent use, puts into carbon fiber indented bars for subsequent use;
(4) outer one section of prefabricated metal sleeve is all stretched out at the two ends of carbon fiber indented bars for subsequent use described in-1., and bends up an angle;
Described step (1)-1, (2)-2, (3)-3, (4)-1, can respectively in step (1), (2), (3), (4) after carry out, also can (1), (2), (3), (4) carry out with step respectively simultaneously.
After the loss of prestress of described pre-stressed carbon fiber indented bars, carry out following steps:
(9). carry out stretch-draw with the two ends of front clip type jack to carbon fiber indented bars for subsequent use, form prestressing force;
(10). in prefabricated metal sleeve for subsequent use, from one end to the other side inject high damping silicone rubber concrete;
(11). after high damping silicone rubber hardening of concrete, then clamp prefabricated metal sleeve for subsequent use with intermediate plate for subsequent use, 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 (inner 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 assigned address.Precast beam, prefabricated post are assembled complete after, by prefabricated metal sleeve, put into carbon fiber indented bars, two ends are all stretched out one section of carbon fiber indented bars and are bent up an angle, facilitate the common front clip type jack stretch-draw in two ends, carbon fiber indented bars is made to form prestressing force, high damping silicone rubber concrete is from one end to the other side injected in prefabricated metal sleeve, after high damping silicone rubber hardening of concrete, prefabricated metal sleeve is clamped again with intermediate plate, produce lateral pressure and carry out anchoring, after removing jack, forming pre-stressed carbon fiber indented bars.Six prefabricated metal sleeves are had in each precast beam, can put into six groups of carbon fiber indented barss, wherein four are evenly distributed on four angles of beam section, also have two and are distributed in middle, as after loss of prestress in future, pre-stressed carbon fiber indented bars that stretch-draw is new.Meanwhile, in perpendicular, the prefabricated metal sleeve of orthogonal precast beam will stagger up and down, ensures pass through smoothly in the prefabricated metal sleeve of prefabricated post.
Wedge-bond type anchorage is the metal cylinder of tubulose, be made up of anchor ring, intermediate plate, high damping silicone rubber concrete is injected 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 the nonmetal presstressed reinforcing steel of anchoring many.After the stretch-draw of pre-stressed carbon fiber indented bars, pressure is applied with to each cross section of beam and column, and avoid precast beam to be subject to excessive concentrated force by wedge-bond type anchorage, thus 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 of carbon fiber indented bars to outside beam, and carbon fiber indented bars is bent up an angle, facilitate jack tension carbon fiber indented bars, and after stretch-draw, use ground tackle anchoring.Therefore pre-stressed carbon fiber indented bars can apply precompression by ground tackle to precast beam rod structure node, plays the effect of reinforcement, and can give full play to the stronger advantage of concrete anti-compression ability.
Pre-stressed carbon fiber indented bars, can apply pressure to the cross section of beam and column, to structure node place Shi Hanzhang, also utilize the screw thread of indented bars and metal sleeve inner ring, increase and the concrete adhesion of high damping silicone rubber.These features strengthen the globality at structure node place, also play the strong advantage of concrete anti-compression ability.And 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 simultaneously filling also has good low temperature resistant feature, is applicable to the particular surroundings of freezer.
Beneficial effect: around existing panel-assembled cold store structure node, by pre-stressed carbon fiber indented bars to freezer bean column node Shi Hanzhang, improve the problem that existing panel-assembled cold store structure node switching performance is poor, enhance the globality of panel-assembled cold store structure, improve the anti-seismic performance of structure node.And carbon fiber indented bars has the advantages such as lightweight, high-strength, low temperature resistant, high temperature resistant, corrosion-resistant, endurance, and high damping silicone rubber concrete also has low temperature resistant feature, is suitable for the particular surroundings needed for freezer.Effectively can 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 the pay attention to day by day of industrialization of construction industry and fast development, the method that freezer structure node strengthened by this pre-stressed carbon fiber indented bars will obtain engineer applied widely, produces significant economic results in society.
accompanying drawing illustrates:
Freezer structure node cross-section front view after Fig. 1 adopts pre-stressed carbon fiber indented bars to strengthen;
Freezer structure node top view after Fig. 2 adopts 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.
Detailed description of the invention
Embodiment 1, the pre-stressed carbon fiber indented bars of panel-assembled cold store structure node strengthens structure, 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, put into wedge-bond type anchorage 3 and prefabricated metal sleeve 2 at assigned address.Complete precast beam, prefabricated post assembled after, carbon fiber indented bars 1 is put 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, carbon fiber indented bars 1 is made to form prestressing force, low temperature resistant high damping silicone rubber concrete 4 is injected prefabricated metal sleeve 2 simultaneously, clamp prefabricated metal sleeve 2 with intermediate plate 6 after waiting high damping silicone rubber concrete 4 to harden, unclamp jack.In top view, the prefabricated metal sleeve 2 of orthogonal precast beam will stagger up and down, ensures pass through smoothly in the prefabricated metal sleeve 2 of prefabricated post.Wedge-bond type anchorage 3 is made up of anchor ring 5, intermediate plate 6, intermediate plate quantity 3, intermediate plate is with serration, the pressure that anchoring principle mainly applies on prefabricated metal sleeve 2 by intermediate plate produces clamping action, high damping silicone rubber concrete 4 is injected in prefabricated metal sleeve 2, prefabricated metal sleeve 2 is clamped again with intermediate plate 6, apply lateral pressure to prefabricated metal sleeve 2, high damping silicone rubber concrete 4 and pre-stressed carbon fiber indented bars 1, form anchoring by the bonding of high damping silicone rubber concrete 4 and the lateral pressure comprehensive function of intermediate plate 6.Prefabricated metal sleeve 2 and high damping silicone rubber concrete 4 ensure that intermediate plate 6 can not damage pre-stressed carbon fiber indented bars 1, serration inside intermediate plate 6, the screw thread of prefabricated metal sleeve 2 inner ring and the screw thread of pre-stressed carbon fiber indented bars 1, also ensure that the anchoring effect that ground tackle is inner good.And have the characteristic of high damping due to high damping silicone rubber concrete 4, the globality of structure can be improved, strengthen the anti-seismic performance of structural entity.
Prefabricated metal sleeve 2 is also put in two the metal ducts stayed in advance, but does not put into pre-stressed carbon fiber indented bars 1, only needs to increase prestressing force in loss of prestress, just in reserved metal duct, puts into pre-stressed carbon fiber indented bars 1 and carry out stretch-draw.
Claims (2)
1. a construction preparation method for structure strengthened by the pre-stressed carbon fiber indented bars of freezer structure node, and it is characterized in that, step is as follows:
(1). in precast beam, precast production process, duct is set in precast beam, prefabricated post inside;
(2). prefabricated metal sleeve and wedge-bond type anchorage are set in described duct;
(3). in described prefabricated metal sleeve, put into 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 to the two ends of carbon fiber indented bars, form prestressing force;
(6). in prefabricated metal sleeve, from one end to the other side inject high damping silicone rubber concrete;
(7). after high damping silicone rubber hardening of concrete, then clamp prefabricated metal sleeve with intermediate plate, produce lateral pressure and carry out anchoring;
(8). form pre-stressed carbon fiber indented bars after removing jack.
2. the construction preparation method of structure strengthened by the pre-stressed carbon fiber indented bars of freezer structure node according to claim 1, it is characterized in that, increases and has following steps:
(1)-1. in precast beam, precast production process, arranges duct for subsequent use in precast beam, prefabricated post inside;
(2)-1. prefabricated metal sleeve for subsequent use and wedge-bond type anchorage for subsequent use are set in described duct for subsequent use;
(3)-1. in described prefabricated metal sleeve for subsequent use, puts into carbon fiber indented bars for subsequent use;
(4) outer one section of prefabricated metal sleeve is all stretched out at the two ends of carbon fiber indented bars for subsequent use described in-1., and bends up an angle;
Described step (1)-1, (2)-2, (3)-3, (4)-1, respectively in step (1), (2), (3), (4) after carry out, or (1), (2), (3), (4) to carry out with step respectively simultaneously;
After the loss of prestress of described pre-stressed carbon fiber indented bars, carry out following steps:
(9). carry out stretch-draw with the two ends of front clip type jack to carbon fiber indented bars for subsequent use, form prestressing force;
(10). in prefabricated metal sleeve for subsequent use, from one end to the other side inject high damping silicone rubber concrete;
(11). after high damping silicone rubber hardening of concrete, then clamp prefabricated metal sleeve for subsequent use with intermediate plate for subsequent use, 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 true CN103469900B (en) | 2015-06-24 |
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| CN103924681B (en) * | 2014-04-14 | 2017-06-16 | 北京工业大学 | Prestressing force connects precast concrete beam square steel tube concrete column reinforcing joint |
| 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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| CH693102A5 (en) * | 1998-12-21 | 2003-02-28 | Bbr Systems Ltd | Anchoring for carbon fiber composite wires. |
| CN200943288Y (en) * | 2006-08-15 | 2007-09-05 | 北京工业大学 | Prestress FRP tendon wedge-bush type anchorage |
| KR20090041017A (en) * | 2007-10-23 | 2009-04-28 | 한국건설기술연구원 | Anchorage apparatus for frp tendon by sleeve with opening and installation method of the same |
| CN201809783U (en) * | 2010-09-26 | 2011-04-27 | 赵正义 | Horizontal connection system construction for tower mast type structure foundation of prefabricated concrete members |
| CN102322152B (en) * | 2011-09-29 | 2013-04-17 | 重庆大学 | Prestressed carbon fiber board tensioning system and tension reinforcing method |
| CN102493660B (en) * | 2011-12-30 | 2014-01-01 | 湖南大学 | Anchoring method and anchoring tool for carbon fiber reinforced composite material prestressed bar |
| CN203007839U (en) * | 2012-12-24 | 2013-06-19 | 武汉大学 | External prestressed anchor device of CFRP (carbon fiber reinforced polymer) tendon wedge anchor |
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