CN1760154A - Method for applying prestressing force on concrete enhanced by fiber weaved net - Google Patents

Method for applying prestressing force on concrete enhanced by fiber weaved net Download PDF

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Publication number
CN1760154A
CN1760154A CN 200510047050 CN200510047050A CN1760154A CN 1760154 A CN1760154 A CN 1760154A CN 200510047050 CN200510047050 CN 200510047050 CN 200510047050 A CN200510047050 A CN 200510047050A CN 1760154 A CN1760154 A CN 1760154A
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CN
China
Prior art keywords
concrete
prestress
prestressing force
fiber
fiber knitted
Prior art date
Application number
CN 200510047050
Other languages
Chinese (zh)
Inventor
徐世烺
李�赫
Original Assignee
大连理工大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 大连理工大学 filed Critical 大连理工大学
Priority to CN 200510047050 priority Critical patent/CN1760154A/en
Publication of CN1760154A publication Critical patent/CN1760154A/en

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Abstract

A method for applying the prestress to the woven fiber mesh reinforced concrete by prestretching method includes such steps as designing fixture, linking said fiber mesh prestress applicator, and turning the screw bolts to stretch the fiber mesh. It can improve the adhesion between fiber mesh and concrete, and preventing crack and deformation.

Description

Fiber knitted net strengthens concrete method for applying prestressing force

Technical field

The invention belongs to technical field of civil engineering, relate to the concrete enhancement techniques, specially refer to a kind of fiber knitted net and strengthen concrete prestressing method.

Background technology

At present, traditional skeleton construction can cause steel bar corrosion because of the intrusion of chlorion or carbonic acid gas, thereby reduces the bearing capacity of structure.According to statistics, some national corrosion loss of the world on average can account for 2%~4% of total value of production in national economy; Wherein, be considered to relevant person and can account for 40% with reinforcement corrosion.In addition, because skeleton construction can not armoured magnetic field, this might make troubles to the mankind, and is especially obvious in hospital.Therefore some medical facilities that are in the magnetic field may magnetize the life that has even threatened patient.So far the crack on concrete problem does not still have well solution, especially the cracking problem of large volume concrete for hydraulic structure, directly threatens the safety of hydraulic structure.

Fiber knitted net is plane or the spatial yarn fabric that utilizes knitting skill that fiber roving is made.Fiber knitted net commonly used has Carbon Fibre Textile, fiberglass braided net and Aramid fiber knitted net.Utilize fiber knitted net to replace reinforcing bar to strengthen concrete and then can limit crack on concrete, make concrete crack become littler, closeer, the while can also obtain high-bearing capacity, excellent in toughness, burn into does not prevent the magnetized building structure of apparatus.Yet can fiber knitted net strengthen the performance of concrete structure properties and depend on them and form good bonding.Because poisson effect and effect of restraint that prestress brings apply suitable prestress and can improve cohesive strength.In addition, because filamentary material tensile strength is higher, in component damage, just concrete crushing, fiber is still far away from breaking, and its tensile strength is not given full play to; Because fibroreticulate Young's modulus is less, its distortion that strengthens concrete member is bigger in addition, for the high-tensile that makes full use of filamentary material with reduce the deformation of member, also will strengthen concrete structure to fibrous reticulum and apply prestress.

Summary of the invention

The purpose of this invention is to provide a kind of utilization fiber knitted net enhancing concrete is applied prestressed method, to make full use of the high-tensile of filamentary material, the control distress in concrete reduces the deformation of member.

Technical scheme of the present invention is to use pretensioning method that it is applied prestress before fiber knitted net is imbedded in the concrete.For clamping fibrous reticulum, special anchor clamps have been designed.Prestressed applying by the screw rod rotation is mobile reaches, and prestressed measurement records by pulling force sensor.

Effect of the present invention and benefit be by fiber knitted net is strengthened concrete structure apply prestress can the increased fiber mesh grid and concrete and fiber yarn between the friction bonding, improve cohesive strength, make fiber knitted net strengthen concrete structure under loading action, the crack is finer and closely woven, the control crack on concrete; Can make full use of simultaneously the high-tensile of fiber, reduce the distortion of structure.

Description of drawings

Accompanying drawing 1 is that the pre-stress fibre mesh grid strengthens concrete prestress deceleration loading device synoptic diagram.

Among the figure: 1 pre-stress fibre mesh grid anchor clamps, 2 fiber knitted nets, 3 pulling force sensors, 4 fixation steel plates, 5 screw rods.

Accompanying drawing 2 is half device synoptic diagram that the pre-stress fibre mesh grid strengthens concrete prestress clamp.

Among the figure: 1 bolt hole that links to each other with loading equipemtn, the bolt hole that 2 clamped fibers nets are used, 3 flute marks that prevent to skid and on steel plate, carve.

Embodiment

Below in conjunction with technical scheme and accompanying drawing, describe specific embodiments of the invention in detail.

Step 1.

At first revise the strain of pulling force sensor and the relation of external force.Promptly utilize hydraulic loaded equipment that pulling force sensor is carried out stretch-draw, utilize the strain of the corresponding pulling force lower sensor of strain gauging, it is generally linear relation.Like this fibrous reticulum being applied prestressed the time, according to the strain value of pulling force sensor, can push away the corresponding external force that applied.

Step 2.

The prestress loading equipemtn is linked and packed, template is fixed on prestress loads on the support.Use the clamp clamps fiber knitted net, and the anchoring fiber mesh grid is in concrete depositing Mould design height place.

Step 3.

Apply prestress.Use the spanner rotary screw, it is moved backward, fibrous reticulum is tightened immediately, and the strain-ga(u)ge reading that observation links to each other with transmitter when its reading reaches the pairing strain of design prestress, stops the screw rod rotation and moves.

Step 4.

After treating that prestress reaches set(ting)value, deposit concrete in mould.

Step 5.

After treating concrete hardening, its intensity can guarantee fibrous reticulum and concrete bonding, discharges prestress.At this moment, preferably measure the reading of a lower sensor.Then other equipment such as transmitter are unloaded down from the prestress deceleration loading device.

Claims (3)

1. a fiber knitted net strengthens concrete method for applying prestressing force, it is characterized in that utilizing pretensioning method that fiber knitted net is strengthened concrete structure and applies prestress.
2. strengthen concrete method for applying prestressing force according to claims 1 described a kind of fiber knitted net, it is characterized in that prestressed applying, be after the various device of fibrous reticulum and prestressing apparatus connects,, reach the fibroreticulate stretch-draw of tightening by moving of screw rod.
3. strengthen concrete method for applying prestressing force according to claims 1 described a kind of fiber knitted net, it is characterized in that the design of prestress clamp.
CN 200510047050 2005-08-10 2005-08-10 Method for applying prestressing force on concrete enhanced by fiber weaved net CN1760154A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200510047050 CN1760154A (en) 2005-08-10 2005-08-10 Method for applying prestressing force on concrete enhanced by fiber weaved net

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200510047050 CN1760154A (en) 2005-08-10 2005-08-10 Method for applying prestressing force on concrete enhanced by fiber weaved net

Publications (1)

Publication Number Publication Date
CN1760154A true CN1760154A (en) 2006-04-19

Family

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Family Applications (1)

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CN 200510047050 CN1760154A (en) 2005-08-10 2005-08-10 Method for applying prestressing force on concrete enhanced by fiber weaved net

Country Status (1)

Country Link
CN (1) CN1760154A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101906884A (en) * 2010-08-18 2010-12-08 北京荣大兴业建筑材料有限公司 Device and method for stretching steel wire rope net
CN103776565A (en) * 2014-01-07 2014-05-07 中国科学院力学研究所 Standard prestress loading device applied to residual stress press-in test method detection
CN105421652A (en) * 2015-09-29 2016-03-23 南通大学 Composite heat-preserving wallboard
CN106092202A (en) * 2016-07-15 2016-11-09 大连理工大学 The device that fiber cloth acoplanarity displacement loads on microscope carrier
CN106338238A (en) * 2016-08-09 2017-01-18 大连理工大学 Coordinate measuring machine-strain joint measuring method for large-scale component

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101906884A (en) * 2010-08-18 2010-12-08 北京荣大兴业建筑材料有限公司 Device and method for stretching steel wire rope net
CN101906884B (en) * 2010-08-18 2011-09-28 北京荣大兴业建筑材料有限公司 Device and method for stretching steel wire rope net
CN103776565A (en) * 2014-01-07 2014-05-07 中国科学院力学研究所 Standard prestress loading device applied to residual stress press-in test method detection
CN103776565B (en) * 2014-01-07 2016-06-29 中国科学院力学研究所 The standard prestressing force charger of method of testing inspection it is pressed into for residual stress
CN105421652A (en) * 2015-09-29 2016-03-23 南通大学 Composite heat-preserving wallboard
CN105421652B (en) * 2015-09-29 2018-09-28 南通大学 A kind of composite thermo-insulating wall board
CN106092202A (en) * 2016-07-15 2016-11-09 大连理工大学 The device that fiber cloth acoplanarity displacement loads on microscope carrier
CN106092202B (en) * 2016-07-15 2019-07-16 大连理工大学 The device that fiber cloth acoplanarity displacement loads on microscope carrier
CN106338238A (en) * 2016-08-09 2017-01-18 大连理工大学 Coordinate measuring machine-strain joint measuring method for large-scale component
CN106338238B (en) * 2016-08-09 2018-04-24 大连理工大学 A kind of big three coordinates of component-strain union measuring method

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