CN201695573U - Novel fiber-reinforced plastic (FRP)-prestressed concrete prisms (PCPs) composite bar concrete beam - Google Patents

Novel fiber-reinforced plastic (FRP)-prestressed concrete prisms (PCPs) composite bar concrete beam Download PDF

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Publication number
CN201695573U
CN201695573U CN201020230896XU CN201020230896U CN201695573U CN 201695573 U CN201695573 U CN 201695573U CN 201020230896X U CN201020230896X U CN 201020230896XU CN 201020230896 U CN201020230896 U CN 201020230896U CN 201695573 U CN201695573 U CN 201695573U
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China
Prior art keywords
frp
concrete
pcps
muscle
bars
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Expired - Fee Related
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CN201020230896XU
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Chinese (zh)
Inventor
张鹏
邓宇
杨勇
薛建阳
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Xian University of Architecture and Technology
Guangxi University of Science and Technology
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Xian University of Architecture and Technology
Guangxi University of Science and Technology
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Abstract

The utility model relates to a concrete beam used in the technical field of civil engineering, particularly to a novel fiber-reinforced plastic (FRP)-prestressed concrete prisms (PCPs) composite bar concrete beam, which comprises a concrete beam main body, non-prestressed bars and stirrups. The non-prestressed bars are arranged at the upper part of the interior of the concrete beam main body, FRP-PCPs composite bars are arranged at the lower part of the interior of the concrete beam main body and are formed by embedding FRP bars in PCPs with small cross sections, and the stirrups are arranged outside the non-prestressed bars and the FRP-PCPs composite bars. The FRP-PCPs composite bar concrete beam can delay crack expansion, reduce crack width, improve element rigidity, strength and ductility, and take full use of FRP bars. Because the FRP-PCPs composite bars can be prefabricated in batch, compared with common FRP bars, the FRP-PCPs composite bars also have the advantages of convenient construction, better ductility, etc.

Description

The compound reinforced concrete beam of a kind of novel pre-stressed FRP
Technical field
The utility model relates to the concrete beam in a kind of technical field of civil engineering, the compound reinforced concrete beam of particularly a kind of novel pre-stressed FRP.
Background technology
Traditional reinforced concrete structure, because building is in the exposure property environment, corrosion takes place in reinforcing bar easily, and is special, is that the corrosion problem of reinforcing bar is more serious when being on the verge of erosion environment condition such as sea port dock when building.When the existing concrete beam prepared, in order to address this problem, it was that the FRP muscle replaces reinforcing bar that a kind of new method adopts fibre reinforced plastics (Fiber Reinforced Plastic) muscle exactly.Compare with reinforcing bar, the FRP muscle has characteristics such as tensile strength height, corrosion resistance is good, modulus of elasticity is low, proportion is little, can give full play to its high-intensity advantage in prestressed reinforced concrete construction; But the stress-strain relation of FRP muscle all presents linear elasticity before destroying, this reinforcing steel bar bear performance with concrete clear and definite surrender step is different, make pre-stress FRP reinforced concrete member not have manifest signs before destruction, the ductility of concrete beam is poor, and distortion is big.Make the design of FRP reinforced concrete beam often by crack width and Deformation control, the FRP muscle strength of materials is not in full use.
Summary of the invention
The technical problems to be solved in the utility model is: provide a kind of have delay crack developing, reduce crack width, improve stiffness of structural member, increase component strength, improve member ductility and make full use of the compound reinforced concrete beam of novel pre-stressed FRP of advantages such as FRP muscle material, to solve the weak point that exists in the above-mentioned present technology.
The technical scheme that solves the problems of the technologies described above is: the compound reinforced concrete beam of a kind of novel pre-stressed FRP, comprise concrete beam main body, non-prestressing tendon and stirrup, arrange non-prestressing tendon at concrete beam main body internal upper part, lower disposed has the compound muscle of FRP-PCPs in the concrete beam main body, the compound muscle of described FRP-PCPs is meant heeling-in pre-stress FRP muscle in the less high-strength concrete prism in cross section, and described stirrup hoop is in the non-prestressing tendon and the compound muscle of the FRP-PCPs outside.
The high-strength concrete prism two sides of the compound muscle of described FRP-PCPs also are provided with the rib line, described rib line or the perpendicular rib line vertical with high-strength concrete prism bottom surface or form the diagonal rib line of 30~60 ° of angle β with high-strength concrete prism bottom surface.
Described FRP muscle is CFRP muscle, GFRP muscle, BFRP muscle or AFRP muscle.
The concrete beam of the compound muscle of employing FRP-PCPs of the utility model is compared with common FRP reinforced concrete beam, along with the prestressing force level that is applied in the compound muscle of FRP-PCPs increases, the compound muscle of FRP-PCPs can effectively reduce the crack width of concrete beam under normal service load very much, delay crack developing, effectively improve the concrete beam crack resistance, can obviously improve simultaneously the rigidity of beam, make concrete beam can fully satisfy requirement under the normal operating condition, the FRP strength of materials is fully used, improves structure bearing capacity greatly; And particularly importantly the whole stressed stage of the compound reinforced concrete beam of FRP-PCPs has one " member offset procedure ", and piece table reveals the good ductility performance, has greatly improved common FRP reinforced concrete beam brittle fracture performance deficiency.In general, the compound muscle of FRP-PCPs is compared with common FRP reinforced concrete, have the crack developing of delaying, reduce crack width, improve stiffness of structural member, increase component strength, improve member ductility and make full use of advantages such as FRP material, simultaneously because the compound muscle of FRP-PCPs can be prefabricated in batches, compare with common pre-stress FRP muscle, the compound muscle of FRP-PCPs also has advantages such as easy construction and ductility is better, and because the compound muscle of FRP-PCPs can carry out prefabrication and customization, the fabricating quality of compound muscle and mechanical property can obtain strict control.
Below, the technical characterictic to the compound reinforced concrete beam of a kind of novel pre-stressed FRP of the utility model is further described in conjunction with the accompanying drawings and embodiments.
Description of drawings
Fig. 1~Fig. 2: the utility model embodiment one structural representation: Fig. 1: front view, the A-A sectional view of Fig. 2: Fig. 1.
Fig. 3: the compound muscle structural representation of the FRP-PCPs of the utility model (being provided with the rib line).
One of right view of Fig. 4: Fig. 3, two of the right view of Fig. 5: Fig. 3.
Among the figure: 1-concrete beam main body, the 2-non-prestressing tendon, the 3-stirrup, the compound muscle of 4-FRP-PCPs, 41-high-strength concrete prism, 42-pre-stress FRP muscle, 43-rib line, 431-erects rib line, 432-diagonal rib line.
The specific embodiment
The compound reinforced concrete beam of one one kinds of novel pre-stressed FRP of embodiment is (referring to Fig. 1~Fig. 2), comprise concrete beam main body 1, non-prestressing tendon 2 and stirrup 3, arrange non-prestressing tendon 2 at concrete beam main body 1 internal upper part, lower disposed has the compound muscle 4 of FRP-PCPs in concrete beam main body 1, PCPs represents the high-strength concrete prism that the cross section is less, the compound muscle of described FRP-PCPs is meant heeling-in pre-stress FRP muscle 42 in the less high-strength concrete prism 41 in cross section, after treating that high-strength concrete reaches design strength, pre-stress FRP muscle and high-strength concrete prism have been combined to form the less compound muscle of FRP-PCPs that is suitable for axial tension of sectional dimension mutually, and described stirrup 3 binds round in the non-prestressing tendon 2 and the compound muscle of FRP-PCPs 4 outsides.
The manufacturing process of present embodiment: the length that requires according to pre-stress FRP muscle 42 in the structure is cut muscle; Adopt jack pair pre-stress FRP muscle 42 to carry out stretch-draw, after stretch-draw finishes; FRP muscle 42 is imbedded in the high-strength concrete prism 41, after treating that high-strength concrete reaches design strength, pre-stress FRP muscle and high-strength concrete prism have been combined to form the less compound muscle 4 of FRP-PCPs prestressing force that is suitable for axial tension of sectional dimension mutually, and then the compound muscle 4 of FRP-PCPs prestressing force is arranged on the corresponding position of concrete beam main body; Carry out layout, the colligation of non-prestressing tendon 2 and stirrup 3 simultaneously; Disturbing concrete injects template, treats that concrete reaches desired compressive strength, has promptly formed the compound reinforced concrete beam of novel pre-stressed FRP-PCPs.The compound reinforced concrete beam section of the novel pre-stressed FRP size of the utility model, the kind of FRP muscle and diameter, the sectional dimension of concrete intensity, the compound muscle of FRP-PCPs is determined by computational analysis according to actual needs.
As a kind of conversion of the present utility model, high-strength concrete prism 41 two sides of the compound muscle of described FRP-PCPs can also be provided with rib line 43, described rib line or the perpendicular rib line 431 vertical or form the diagonal rib line 432 of 30~60 ° of angle β (referring to Fig. 3~Fig. 5) with high-strength concrete prism bottom surface with high-strength concrete prism bottom surface, having increased by two side rib lines can increase the roughness coefficient of the compound muscle of FRP-PCPs and surrounding concrete, improve the frictional force between the concrete, thereby strengthened the adhesion strength of compound muscle of FRP-PCPs and surrounding concrete and the cracking resistance ability of the compound rib component of raising FRP-PCPs.
The described FRP muscle of each embodiment of the utility model can be CFRP muscle (carbon fibre bar), GFRP muscle (glass fiber muscle), BFRP muscle (basalt fibre muscle) or AFRP muscle (aramid fiber reinforced plastic bars).
The utility model is not only applicable to many, high building structure, and more is applicable to multiple buildings such as bridge construction, hydraulic structure and sea port dock.

Claims (3)

1. compound reinforced concrete beam of novel pre-stressed FRP, comprise concrete beam main body (1), non-prestressing tendon (2) and stirrup (3), arrange non-prestressing tendon (2) at concrete beam main body (1) internal upper part, it is characterized in that: lower disposed has the compound muscle of FRP-PCPs (4) in concrete beam main body (1), the compound muscle of described FRP-PCPs is meant heeling-in pre-stress FRP muscle (42) in the less high-strength concrete prism (41) in cross section, and described stirrup (3) binds round in the non-prestressing tendon (2) and the compound muscle of FRP-PCPs (4) outside.
2. the compound reinforced concrete beam of a kind of novel pre-stressed FRP according to claim 1, it is characterized in that: high-strength concrete prism (41) two sides of the compound muscle of described FRP-PCPs also are provided with rib line (43), described rib line or the perpendicular rib line (431) vertical with high-strength concrete prism bottom surface or form the diagonal rib line (432) of 30~60 ° of angle β with high-strength concrete prism bottom surface.
3. the compound reinforced concrete beam of a kind of novel pre-stressed FRP according to claim 1 and 2 is characterized in that: described FRP muscle is CFRP muscle, GFRP muscle, BFRP muscle or AFRP muscle.
CN201020230896XU 2010-06-21 2010-06-21 Novel fiber-reinforced plastic (FRP)-prestressed concrete prisms (PCPs) composite bar concrete beam Expired - Fee Related CN201695573U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104458377A (en) * 2014-12-13 2015-03-25 广西科技大学 Method for manufacturing specimens containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars
CN104458402A (en) * 2014-12-13 2015-03-25 广西科技大学 Method for manufacturing specimen containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars
CN104483170A (en) * 2014-12-13 2015-04-01 广西科技大学 Test piece containing CFRP-PCPs composite bars
CN104526869A (en) * 2014-12-13 2015-04-22 广西科技大学 CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite bar manufacturing process
CN106192764A (en) * 2016-08-22 2016-12-07 广东工业大学 A kind of pre-stress FRP concrete box type girder and production technology
CN110005129A (en) * 2019-04-25 2019-07-12 长安大学 FRP tendons fiber high-strength light aggregate concrete beam component and production method
CN111168809A (en) * 2019-12-30 2020-05-19 江苏绿材谷新材料科技发展有限公司 Method for realizing crack resistance of concrete beam component by optimizing ribbed FRP (fiber reinforced Plastic) ribs

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104458377A (en) * 2014-12-13 2015-03-25 广西科技大学 Method for manufacturing specimens containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars
CN104458402A (en) * 2014-12-13 2015-03-25 广西科技大学 Method for manufacturing specimen containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars
CN104483170A (en) * 2014-12-13 2015-04-01 广西科技大学 Test piece containing CFRP-PCPs composite bars
CN104526869A (en) * 2014-12-13 2015-04-22 广西科技大学 CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite bar manufacturing process
CN106192764A (en) * 2016-08-22 2016-12-07 广东工业大学 A kind of pre-stress FRP concrete box type girder and production technology
CN110005129A (en) * 2019-04-25 2019-07-12 长安大学 FRP tendons fiber high-strength light aggregate concrete beam component and production method
CN111168809A (en) * 2019-12-30 2020-05-19 江苏绿材谷新材料科技发展有限公司 Method for realizing crack resistance of concrete beam component by optimizing ribbed FRP (fiber reinforced Plastic) ribs

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Granted publication date: 20110105

Termination date: 20110621