CN103306215A - Novel reinforcing device for reinforced concrete bridge pier and construction method thereof - Google Patents
Novel reinforcing device for reinforced concrete bridge pier and construction method thereof Download PDFInfo
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- CN103306215A CN103306215A CN2013102005607A CN201310200560A CN103306215A CN 103306215 A CN103306215 A CN 103306215A CN 2013102005607 A CN2013102005607 A CN 2013102005607A CN 201310200560 A CN201310200560 A CN 201310200560A CN 103306215 A CN103306215 A CN 103306215A
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Abstract
The invention discloses a novel reinforcing device for a reinforced concrete bridge pier, which comprises two U-shaped steel hoop parts in corresponding buckling, and bolt pre-tightening parts applying prestressing force to the steel hoop parts, wherein ends of the two steel hoop parts are respectively and correspondingly welded together to form a closed hoop matched with the periphery of the bridge pier; and FRP sheets are fixedly and continuously adhered on the outer side of the steel hoop parts in the length direction. According to the invention, due to the adoption of the technical scheme, the novel reinforcing device originally integrates the FRP sheets with good tensile strength and the steel hoop parts with good plastic deformation performance; with the steel hoop parts, the stress lagging condition is avoided, and the features of the FRP sheets can be fully utilized, and accordingly, the comprehensive reinforcing strength of the device is effectively improved. Meanwhile, with the corrosion resistance and durability of the RFP sheets, the steel hoop parts can be effectively protected. The invention also provides a construction method for the novel reinforcing device, which is clear and simple in procedures and high in construction efficiency.
Description
Technical field
The present invention relates to bridge pier reinforcing technique field, be specifically related to a kind of novel reinforced device and job practices thereof of reinforced concrete bridge pier.
Background technology
Bridge is " throat " of transport hub as the important component part of lifeline engineering, and the destruction of bridge will cause the interruption of lifeline, and the loss that causes is inestimable.Bridge pier is main load-bearing and the lateral resistant member of bridge, and the destruction of bridge pier tends to cause the Total Collapse of bridge.A large amount of actual earthquakes show, because bridge pier anti-seismic performance deficiency causes, wherein the most serious defective is that the stirrup configuration is not enough to existing bridge collapse often.In the seismic hardening of reinforced concrete bridge pier, should pay attention to how making and add part to the good horizontal restrain of original cross section generation, increase the ductility of ruggedized construction with amplitude peak ground.Simultaneously, Scheme of Strengthening also should reduce footing stress as far as possible and lag behind, and makes the effective collaborative work of footing and original structure.
In the recent decade, high-performance fiber reinforced composite (FRP material) with its high-strength light, corrosion resistance, construction is convenient and the advantage such as designability, have a wide range of applications in the bridge pier field of reinforcement.But because there are the stress hysteresis effect in reinforcement material and existing ruggedized construction, the high-strength characteristics of FRP material can not be brought into play fully, greatly affect its consolidation effect.
Given this, this case the inventor further investigate the problems referred to above, then has this case to produce.
Summary of the invention
The object of the present invention is to provide a kind of situation of avoiding stress to lag behind to occur, bring into play efficiently the characteristic of FRP cloth, have simultaneously the more novel reinforced device of long life, consolidation effect is good, and is practical.
Another object of the present invention is to provide a kind of job practices of novel reinforced device of above-mentioned reinforced concrete bridge pier, the step simple and clear, efficiency of the practice is high.
In order to achieve the above object, the present invention adopts such technical scheme:
A kind of novel reinforced device of reinforced concrete bridge pier, comprise two can the corresponding U-shaped that fastens stirrup section, the end of two described stirrup sections is corresponding respectively to be welded together to form the closed loop cuff suitable with the side face of reinforced concrete bridge pier; Also be equipped with described stirrup section is applied prestressed tools for bolts ' pretension section, the described stirrup section outside fixedly is fitted with FRP cloth continuously along stirrup minister degree direction.
Above-mentioned tools for bolts ' pretension section comprises the junction plate of the vertical direction that is divided into two above-mentioned stirrup section ends, with the pretension bolt that passes two corresponding described junction plates and carry out pretension.
Above-mentioned junction plate by one and along the fixed head of above-mentioned stirrup section external surface and stirrup section is dismantled and assembled links together.
Above-mentioned fixed head and above-mentioned stirrup section are bolted to connection.
Be provided with the set square reinforcing rib between above-mentioned junction plate and the above-mentioned fixed head.
The above-mentioned stirrup section of two fastenings is rounded.
The above-mentioned stirrup section of two fastenings is square.
The bending place of above-mentioned stirrup section is level and smooth arc.
Corresponding reinforced concrete bridge pier is provided with coupling and is padded on billet larger with respect to the bending place area between the two in its bending place in above-mentioned stirrup section.
A kind of job practices of novel reinforced device of reinforced concrete bridge pier:
(1) reinforced concrete bridge pier that needs reinforcement is carried out the chamfered that bending place therewith is complementary in the position of the above-mentioned stirrup of correspondence section bending place, and at the above-mentioned billet of this chamfering place liner;
(2) the above-mentioned stirrup of installation section carries out prestress application by the pretension bolts of tightening the corresponding junction plate that passes two fastening stirrup sections to stirrup section to needing to reinforce the position;
(3) after the prestressing force that puts on above-mentioned stirrup section reaches predeterminated level, the fishplate bar to be welded of described stirrup section end is carried out the equal strength welding, sheds above-mentioned pretension bolt and junction plate by above-mentioned bolt after the cooling.
(4) adopt strength grade to fill greater than the modified mortar of M35 to above-mentioned stirrup section welding position;
(5) firmly paste continuously FRP cloth at the external surface of above-mentioned stirrup section along its length direction.
After adopting technique scheme, compared with prior art, the novel reinforced device of reinforced concrete bridge pier of the present invention, its FRP cloth that will have good tensile strength organically combines with the stirrup section with good plastic strain performance, by tools for bolts ' pretension section stirrup section is carried out pretension operation, the situation of avoiding stress to lag behind occurs, fixing applying FRP cloth behind the pretension, can bring into play efficiently the characteristic of FRP cloth, Effective Raise integrative consolidation intensity of the present invention; The FRP material has good corrosion-resistant and durability simultaneously, and section effectively protects to stirrup, improves the durability of stirrup section, and then prolongs the application life of bracing means integral body, and is practical;
The present invention also proposes a kind of job practices of above-mentioned novel reinforced device, the step simple and clear, but Effective Raise is implemented the efficient of described novel reinforced device.
Description of drawings
Fig. 1 is the structural representation of the second embodiment of the present invention;
Fig. 2 is the simple and easy schematic diagram of use state of the first embodiment of the present invention;
Fig. 3 is the simple and easy schematic diagram of use state of the second embodiment of the present invention.
Among the figure:
1-stirrup section 11-bending place
The 12-billet
The 2-tools for bolts ' pretension 21-of section junction plate
211-fixed head 212-bolt
213-set square reinforcing rib 22-pretension bolt
3-FRP cloth 4-reinforced concrete bridge pier
The specific embodiment
Be described in detail technical scheme of the present invention below by specific embodiment in order further to explain.
The novel reinforced device of a kind of reinforced concrete bridge pier of the present invention, as Figure 1-3, comprise two can the corresponding U-shaped that fastens stirrup section 1.
The end of two stirrup sections 1 is corresponding respectively to be welded together to form the closed loop cuff suitable with the side face of reinforced concrete bridge pier 4; Also be equipped with stirrup section 1 is applied prestressed tools for bolts ' pretension section 2, stirrup section 1 outside fixedly is fitted with FRP cloth 3 continuously along stirrup section 1 length direction, the FRP material has good tensile strength, this structure organically combines the high-strength pulling-resisting performance of FRP cloth 3 and stirrup section 1 good plastic strain performance, carry out pretension by 2 pairs of stirrup sections of tools for bolts ' pretension section 1, again the stirrup section 1 that fastens is welded and fixed, and then fixing applying FRP cloth 3, the situation that can effectively avoid stress to lag behind occurs, bring into play efficiently the characteristic of FRP cloth 3, Effective Raise integrative consolidation intensity of the present invention; The FRP material has good corrosion-resistant and durability simultaneously, and 3 pairs of stirrup sections 1 of FRP cloth effectively protect, and improves the durability of stirrup section 1.
Preferably, tools for bolts ' pretension section 2 comprises the junction plate 21 of the vertical direction that is divided into two stirrup sections, 1 end, with the pretension bolt 22 that passes two corresponding junction plates 21 and carry out pretension.
Preferably, junction plate 21 by one and along the fixed head 211 and stirrup section 1 dismantled and assembled linking together of stirrup section 1 external surface, be that junction plate 21 is fixedly connected with stirrup section 1 and dismantled and assembled, after the prestressing force that puts on stirrup section 1 by pretension bolt 22 reaches predeterminated level, fishplate bar to be welded to stirrup section 1 end carries out the equal strength welding, removable pretension bolt 22 and the junction plate 21 laid down after the cooling, convenient and practical.
For specific implementation junction plate 21 is connected with the dismantled and assembled of stirrup section 1, and guarantee solid and reliable, with the carrying pretension bolt 22 pretightning force, preferably, fixed head 211 is fixedly connected with by bolt 212 with stirrup section 1.
Preferably, be provided with set square reinforcing rib 213 between junction plate 21 and the fixed head 211, set square reinforcing rib 213 can improve the intensity of connecting portion 21, and then can improve the fastening strength of integral body of the present invention.
In order to adapt to columniform bridge pier, preferred the first embodiment, the stirrup section 1 of two fastenings is rounded.
In order to adapt to the square column type bridge pier, preferred the second embodiment, the stirrup section 1 of two fastenings is square.
Preferably, the bending place 11 of stirrup section 1 is level and smooth arc, concentrates to avoid these bending place 11 stress, improves its bearing strength.
Preferably, stirrup section 1 is provided with coupling at its bending place 11 corresponding reinforced concrete bridge piers 4 and is padded between the two and the billet 12 larger with respect to bending place 11 areas, billet 12 can effectively reduce the pretightning force pressure of the 11 pairs of reinforced concrete bridge piers 4 in bending place, the bearing strength of reinforcing steel bar concrete pier 4 and total.
Also the give chapter and verse job practices of novel reinforced device of the reinforced concrete bridge pier among each embodiment of aforementioned adaptation square column type bridge pier of the present invention:
(1) reinforced concrete bridge pier 4 that needs reinforcement is carried out the chamfered that bending place 11 therewith is complementary in the position of the bending place 11 of corresponding stirrup section 1, and at this chamfering place liner billet 12;
(2) stirrup section 1 to need are installed and are reinforced the position, carry out prestress application by 22 pairs of stirrup sections of pretension bolt 1 of tightening the corresponding junction plate 21 that passes two fastening stirrup sections 1;
(3) after the prestressing force that puts on stirrup section 1 reaches predeterminated level, the fishplate bar to be welded of stirrup section 1 end is carried out the equal strength welding, sheds pretension bolt 22 and junction plate 21 by bolt 212 after the cooling.
(4) adopt strength grade to fill greater than the modified mortar of M35 to stirrup section 1 welding position, to realize its structural integrity, improve intensity;
(5) firmly paste continuously FRP cloth 3 at the external surface of stirrup section 1 along its length direction.
Novel reinforced device and the job practices thereof of reinforced concrete bridge pier of the present invention, just pad guarantee area greater than the bending place of stirrup section and with the corresponding situation of the chamfering of reinforced concrete bridge pier under, its concrete shape and size etc. can be adjusted and design according to actual requirement; The concrete shape of the bending place of stirrup section can be adjusted and design according to actual requirement; The dismantled and assembled connected mode of fixed head and stirrup section also can be adjusted and design according to actual requirement; The concrete size and dimension of connecting portion etc. can be adjusted and design according to actual requirement; The stirrup quality award from the ministry is elected steel plate as, also can choose according to actual requirement.
Product form of the present invention is not limited to this case diagram and embodiment, and anyone carries out suitable variation or the modification of similar thinking to it, all should be considered as not breaking away from patent category of the present invention.
Claims (10)
1. the novel reinforced device of a reinforced concrete bridge pier, comprise two can the corresponding U-shaped that fastens stirrup section, the end of two described stirrup sections is corresponding respectively to be welded together to form the closed loop cuff suitable with the side face of reinforced concrete bridge pier; It is characterized in that: also be equipped with described stirrup section is applied prestressed tools for bolts ' pretension section, the described stirrup section outside fixedly is fitted with FRP cloth continuously along stirrup minister degree direction.
2. the novel reinforced device of a kind of reinforced concrete bridge pier according to claim 1, it is characterized in that: above-mentioned tools for bolts ' pretension section comprises the junction plate of the vertical direction that is divided into two above-mentioned stirrup section ends, with the pretension bolt that passes two corresponding described junction plates and carry out pretension.
3. the novel reinforced device of a kind of reinforced concrete bridge pier according to claim 2 is characterized in that: above-mentioned junction plate by one and along the fixed head of above-mentioned stirrup section external surface and stirrup section is dismantled and assembled links together.
4. the novel reinforced device of a kind of reinforced concrete bridge pier according to claim 3 is characterized in that: above-mentioned fixed head and above-mentioned stirrup section are bolted to connection.
5. the novel reinforced device of a kind of reinforced concrete bridge pier according to claim 4 is characterized in that: be provided with the set square reinforcing rib between above-mentioned junction plate and the above-mentioned fixed head.
6. the novel reinforced device of each described a kind of reinforced concrete bridge pier according to claim 1-5 is characterized in that: the above-mentioned stirrup section of two fastenings is rounded.
7. the novel reinforced device of each described a kind of reinforced concrete bridge pier according to claim 1-5 is characterized in that: the above-mentioned stirrup section of two fastenings is square.
8. the novel reinforced device of a kind of reinforced concrete bridge pier according to claim 7 is characterized in that: the bending place of above-mentioned stirrup section is level and smooth arc.
9. the novel reinforced device of a kind of reinforced concrete bridge pier according to claim 8 is characterized in that: corresponding reinforced concrete bridge pier is provided with coupling and is padded on billet larger with respect to the bending place area between the two in its bending place in above-mentioned stirrup section.
10. the job practices of the novel reinforced device of an a kind of reinforced concrete bridge pier according to claim 9 is characterized in that:
(1) reinforced concrete bridge pier that needs reinforcement is carried out the chamfered that bending place therewith is complementary in the position of the above-mentioned stirrup of correspondence section bending place, and at the above-mentioned billet of this chamfering place liner;
(2) the above-mentioned stirrup of installation section carries out prestress application by the pretension bolts of tightening the corresponding junction plate that passes two fastening stirrup sections to stirrup section to needing to reinforce the position;
(3) after the prestressing force that puts on above-mentioned stirrup section reaches predeterminated level, the fishplate bar to be welded of described stirrup section end is carried out the equal strength welding, sheds above-mentioned pretension bolt and junction plate by above-mentioned bolt after the cooling.
(4) adopt strength grade to fill greater than the modified mortar of M35 to above-mentioned stirrup section welding position;
(5) firmly paste continuously FRP cloth at the external surface of above-mentioned stirrup section along its length direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310200560.7A CN103306215B (en) | 2013-05-27 | 2013-05-27 | The novel reinforced device of a kind of reinforced concrete bridge pier and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310200560.7A CN103306215B (en) | 2013-05-27 | 2013-05-27 | The novel reinforced device of a kind of reinforced concrete bridge pier and construction method thereof |
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| CN103306215A true CN103306215A (en) | 2013-09-18 |
| CN103306215B CN103306215B (en) | 2016-08-24 |
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| CN201310200560.7A Expired - Fee Related CN103306215B (en) | 2013-05-27 | 2013-05-27 | The novel reinforced device of a kind of reinforced concrete bridge pier and construction method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059663A (en) * | 2017-06-19 | 2017-08-18 | 桂林理工大学 | A kind of device of utilization pre-stress FRP cloth reinforced steel concrete pier stud |
| CN108396662A (en) * | 2018-04-03 | 2018-08-14 | 西南交通大学 | Steel bridge assembled reinforcement means and its bracing means |
| CN110700106A (en) * | 2019-10-25 | 2020-01-17 | 罗丽芳 | Bridge construction pier pouring steel template reinforcing structure |
| CN112391943A (en) * | 2020-11-20 | 2021-02-23 | 台州佳沃科技有限公司 | Stride sea bridge with preventing unrestrained crashproof pier |
| CN113774816A (en) * | 2021-09-14 | 2021-12-10 | 湖南工程学院 | Novel method for reinforcing concrete pier by implanting prestressed high-performance reinforcement material into surface layer |
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| JPH09125317A (en) * | 1995-10-27 | 1997-05-13 | Nippon Steel Corp | Reinforced construction of reinforced concrete column base and reinforcing method thereof |
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| CN102392541A (en) * | 2011-11-15 | 2012-03-28 | 安徽工业大学 | Method for reinforcing concrete column by utilizing PVC-FRP (Poly Vinyl Chloride-Fiberglass Reinforced Plastic) pipe |
| CN102729544A (en) * | 2012-07-20 | 2012-10-17 | 武汉大学 | FRP (Fiber Reinforced Polymer)-steel advanced composite material for structure reinforcement and preparation method thereof |
| CN203346803U (en) * | 2013-05-27 | 2013-12-18 | 华侨大学 | Novel strengthening device of reinforced concrete bridge pier |
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- 2013-05-27 CN CN201310200560.7A patent/CN103306215B/en not_active Expired - Fee Related
Patent Citations (7)
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| JPH09125317A (en) * | 1995-10-27 | 1997-05-13 | Nippon Steel Corp | Reinforced construction of reinforced concrete column base and reinforcing method thereof |
| JPH09143931A (en) * | 1995-11-28 | 1997-06-03 | Toutetsu Kogyo Kk | Column reinforcing structure and elevated bridge using the same |
| JP2010150894A (en) * | 2008-12-26 | 2010-07-08 | Birudorando:Kk | Reinforcing structure of concrete made bridge and reinforcing method thereof |
| CN101705662A (en) * | 2009-10-27 | 2010-05-12 | 华侨大学 | Novel pre-stressed steel plate hoop device and installation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059663A (en) * | 2017-06-19 | 2017-08-18 | 桂林理工大学 | A kind of device of utilization pre-stress FRP cloth reinforced steel concrete pier stud |
| CN108396662A (en) * | 2018-04-03 | 2018-08-14 | 西南交通大学 | Steel bridge assembled reinforcement means and its bracing means |
| CN108396662B (en) * | 2018-04-03 | 2023-06-30 | 西南交通大学 | Steel bridge assembly type reinforcing method and reinforcing device thereof |
| CN110700106A (en) * | 2019-10-25 | 2020-01-17 | 罗丽芳 | Bridge construction pier pouring steel template reinforcing structure |
| CN112391943A (en) * | 2020-11-20 | 2021-02-23 | 台州佳沃科技有限公司 | Stride sea bridge with preventing unrestrained crashproof pier |
| CN112391943B (en) * | 2020-11-20 | 2022-08-26 | 常州钢劲型钢股份有限公司 | Stride sea bridge with preventing unrestrained crashproof pier |
| CN113774816A (en) * | 2021-09-14 | 2021-12-10 | 湖南工程学院 | Novel method for reinforcing concrete pier by implanting prestressed high-performance reinforcement material into surface layer |
| CN113774816B (en) * | 2021-09-14 | 2022-06-17 | 湖南工程学院 | Method for reinforcing concrete pier by implanting prestressed high-performance reinforcement material into surface layer |
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| CN103306215B (en) | 2016-08-24 |
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Inventor after: Guo Zixiong Inventor after: Huang Qunxian Inventor after: Liu Yang Inventor after: Chen Jianhua Inventor after: Wang Yifang Inventor before: Guo Zixiong Inventor before: Huang Qunxian Inventor before: Chen Jianhua Inventor before: Wang Yifang |
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Granted publication date: 20160824 |