CN103645133A - Hydraulic fixing device used for measuring bond properties of steel bar with concrete - Google Patents

Hydraulic fixing device used for measuring bond properties of steel bar with concrete Download PDF

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Publication number
CN103645133A
CN103645133A CN201310578387.4A CN201310578387A CN103645133A CN 103645133 A CN103645133 A CN 103645133A CN 201310578387 A CN201310578387 A CN 201310578387A CN 103645133 A CN103645133 A CN 103645133A
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CN
China
Prior art keywords
reinforcing bar
plate
concrete sample
lifting jack
concrete
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Application number
CN201310578387.4A
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Chinese (zh)
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CN103645133B (en
Inventor
沈德建
陈莹
申嘉鑫
成大宝
苏海峰
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河海大学
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Priority to CN201310578387.4A priority Critical patent/CN103645133B/en
Publication of CN103645133A publication Critical patent/CN103645133A/en
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Publication of CN103645133B publication Critical patent/CN103645133B/en

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Abstract

The invention discloses a hydraulic fixing device used for measuring bond properties of a steel bar with concrete. According to the hydraulic fixing device, a base plate, a top plate, and two side plates of an outer frame are all made of steel plates, and are welded together so as to form an integral body; the top plate is provided with a connecting bolt; the connecting bolt is connected with a load transducer; the middle part of the base plate is provided with a U-shaped groove; the middle part of the steel bar is arranged in a concrete test block, the upper part of the steel bar stretches out from the top of the concrete test block, and the lower part of the steel bar stretches out from the bottom of the concrete test block; the concrete test block is placed on the base plate, so that the lower part of the steel bar penetrates through the U-shaped groove and stretches out through the base plate; an upper backing plate is provided with a through hole, and is arranged on the top of the concrete test block; the upper part of the steel bar penetrates the through hole of the upper backing plate, and stretches upwards through the upper backing plate; and the bottom of a hollow jack is arranged on the upper backing plate, and the top of the hollow jack is pressed against the top plate. The hydraulic fixing device is suitable for site tests, is simple in structure, and is convenient for dismounting; and required materials and devices are few.

Description

A kind of hydraulic fixing device of measuring reinforcing bar and concrete adhesive property

Technical field

The present invention relates to a kind of hydraulic fixing device of measuring reinforcing bar and concrete adhesive property, belong to concrete construction field.

Background technology

In field of civil engineering, the adhesive property between reinforcing bar and concrete is the stressed prerequisite of reinforced concrete structure or component load-bearing.In existing engineering, occurred much producing slippage due to reinforcing bar and concrete Bond Degradation, finally caused Important Project accident.The adhesion problem of reinforced concrete structure is significant in engineering practice.The degeneration of bonding is to cause that component strength reduces, the main cause that Stiffness Deterioration and distortion increase.

CN 102539319 A have announced proving installation and the assay method of concrete and rebar dynamic adhesion performance under a kind of direct mensuration reciprocating load, its concrete sample is clamped between counter-force steel plate and concrete sample, and fix concrete sample by four high-strength bolts of concrete sample surrounding, its shortcoming is that the power that can not make four high-strength bolts apply is identical, and can not regulate being easily applied to power on concrete sample; Even if the power applying is close, because stress point is positioned at the surrounding of steel plate, the toughness of steel plate makes the concrete sample can not uniform stressed; The more important thing is, because stress point is positioned at the surrounding of steel plate, stress point is away from reinforcing bar, makes the reinforcing bar concrete around can not uniform stressed; Cause concrete sample itself to produce vertical displacement, directly affect test findings.Cause concrete sample itself to produce vertical displacement, directly affect test findings.Concrete sample is placed on bearing, owing to having used bearing to make complex structure, and heaviness, volume is larger.

Summary of the invention

The fixation problem of concrete sample when technical matters to be solved by this invention is the reinforcing bar that all exposes for concrete sample both sides reinforcing bar and the test of concrete adhesive property, make concrete sample uniform stressed when being fixed, particularly reinforcing bar concrete is around stressed evenly, the vertical displacement problem that while testing to solve, concrete sample itself produces.

In order to solve the problems of the technologies described above, the present invention by the following technical solutions.A kind of hydraulic fixing device of measuring reinforcing bar and concrete adhesive property, comprise outside framework, upper padding plate, hydraulic oil pump, oil inlet pipe, scavenge pipe, hollow lifting jack, concrete sample, reinforcing bar, outside framework comprises side plate, base plate, top board, base plate, top board, two blocks of side plates are steel plate in aggregates by welding structure, surface of steel plate adopts zinc-plated processing, the middle part of base plate has U-lag, the opening of U-lag forward or backwards, reinforcing bar middle part is arranged in concrete sample, the top of concrete sample is stretched out on reinforcing bar top, the bottom of concrete sample is stretched out in reinforcing bar bottom, concrete sample is placed on base plate, reinforcing bar bottom is passed and is stretched out downwards from base plate from U-lag, on upper padding plate, have through hole, upper padding plate is placed on the top of concrete sample, reinforcing bar top passes and protrudes upward from upper padding plate from the through hole of upper padding plate, the bottom of hollow lifting jack is placed on upper padding plate, the top of hollow lifting jack contacts with top board, there is through hole at the center of hollow lifting jack, reinforcing bar top is positioned at the through hole of hollow lifting jack, hydraulic oil pump is connected with hollow lifting jack by oil inlet pipe and scavenge pipe.

Preferably: also comprise coupling bolt, hydraulic chuck, load transducer, displacement measuring device, on top board, have threaded hole, coupling bolt is arranged in threaded hole, and coupling bolt is connected with load transducer, reinforcing bar bottom is connected with hydraulic chuck, and displacement measuring device is connected with hydraulic chuck.

Preferably: reinforcing bar top is positioned on the central shaft of hollow lifting jack.

Preferably: hydraulic oil pump has dead load function.

Beneficial effect: this programme makes concrete sample uniform stressed when being fixed, concrete sample in the vertical direction does not upwards produce relative displacement with concrete sample stationary installation downwards.The present invention is applicable to on-the-spot test; Simple in structure, convenient disassembly, material requested and instrument are few.

Accompanying drawing explanation

Fig. 1 is the front view of this device.

Fig. 2 is upper padding plate vertical view.

Fig. 3 is base plate vertical view.

Reference numeral title is as follows:

1, outside framework; 2, side plate; 3, base plate; 4, top board; 5, coupling bolt; 6, upper padding plate; 7, hydraulic oil pump; 8, oil inlet pipe; 9, scavenge pipe; 10, hollow lifting jack; 11, concrete sample; 12, reinforcing bar top; 13, reinforcing bar bottom.

Embodiment

Below in conjunction with accompanying drawing, the present invention is elaborated:

Measure a hydraulic fixing device for reinforcing bar and concrete adhesive property, comprise outside framework 1, concrete sample 11, reinforcing bar, coupling bolt 5, upper padding plate 6, hydraulic oil pump 7, hollow lifting jack 10.

Outside framework 1 consists of base plate 3, top board 4, two blocks of left and right side plate 2, and base plate 3, top board 4, two blocks of side plates 2 are steel plate, and in aggregates by welding structure.Surface of steel plate adopts zinc-plated processing.The middle part of base plate 3 has U-lag, and the opening of U-lag forward or backwards.

Reinforcing bar middle part is arranged in concrete sample 11, and the top of concrete sample 11 is stretched out on reinforcing bar top 12, and the bottom of concrete sample 11 is stretched out in reinforcing bar bottom 13.Concrete sample 11 is placed on the base plate 3 of outside framework 1, and reinforcing bar bottom 13 passes and stretches out downwards from base plate 3 from U-lag.The effect of U-lag is to make the concrete sample 11 with reinforcing bar bottom 13 to be placed on easily on base plate 3.

On upper padding plate 6, have through hole, upper padding plate 6 is placed on the top of concrete sample 11, and reinforcing bar top 12 passes and protrudes upward from upper padding plate 6 from the through hole of upper padding plate 6.Upper padding plate 6 can adopt the solid material that the hardness such as steel plate are higher to make.Upper padding plate 6 is a flat board.The effect of upper padding plate 6 is to make concrete sample 11 uniform stresseds.In general, the position that the through hole on upper padding plate 6 is opened be with concrete sample 11 in the position on reinforcing bar top 12 adapt.For the versatility of convenient processing and equipment, the position that the through hole on upper padding plate 6 is opened can be arranged in the middle of upper padding plate 6.

The bottom of hollow lifting jack 10 is placed on upper padding plate 6, and the top of hollow lifting jack 10 contacts with top board 4.Hydraulic oil pump 7 is connected with hollow lifting jack 10 by oil inlet pipe 8 and scavenge pipe 9.By hydraulic oil pump 7, can control the top of hollow lifting jack 10 and lift, because hollow lifting jack 10 is placed between upper padding plate 6 and top board 4, hollow lifting jack 10 can make concrete sample 11 be fixed on base plate.Owing to there being the reinforcing bar top 12 of reinforcing steel bars exposed on concrete sample 11, there is through hole at hollow lifting jack 10 center, reinforcing bar top 12 is positioned at the through hole of hollow lifting jack 10, preferably reinforcing bar top 12 is positioned on the central shaft of hollow lifting jack 10, that is to say that to make reinforcing bar concrete around stressed evenly.Bottom due to hollow lifting jack 10 is placed on upper padding plate 6 again, and so hollow lifting jack 10 is larger with the contact area of upper padding plate 6, makes the stressed more even of concrete sample 11.Hydraulic oil pump 7 has dead load function.

On top board 4, have threaded hole, coupling bolt 5 is arranged in threaded hole, and coupling bolt 5 is connected with load transducer.By coupling bolt 5, outside framework 1 is suspended in stationary installation.This device can be suspended on arbitrarily in stationary installation, can on construction site, measure easily.

Reinforcing bar bottom 13 is connected with hydraulic chuck, by hydraulic chuck, reinforcing bar is moved reciprocatingly, and that is to say, reinforcing bar is applied to Cyclic Loading.And measure load by load transducer.Displacement measuring device is connected with hydraulic chuck, is used for measuring the displacement of reinforcing bar.

Assay method of the present invention is as follows:

Coupling bolt 5 is arranged on outside framework 1, and load transducer is connected with coupling bolt 5; Concrete sample 11 is placed on the base plate 3 of outside framework 1, outside framework 1 is stretched out by U-shaped groove in concrete sample 11 reinforcing bar bottoms 13; At concrete sample 11 tops, place upper padding plate 6, the reinforcing bar top 12 of concrete sample 11 is through the through hole at upper padding plate 6 centers; At upper padding plate 6 tops, place hollow lifting jack 10, and reinforcing bar top 12 is positioned on the central shaft of hollow lifting jack 10, hollow lifting jack 10 bottoms contact with upper padding plate 6, and hollow lifting jack 10 tops contact with top board 4, to hollow lifting jack 10 fuel feeding, make it clamp concrete sample 11.The reinforcing bar bottom 13 of concrete sample 11 is connected with hydraulic chuck.By hydraulic chuck, reinforcing bar is applied to reciprocal load, and measure load and displacement by load transducer and displacement measuring device, and calculate concrete and rebar dynamic adhesion performance under reciprocating load by the load and the displacement meter that record.

Claims (4)

1. a hydraulic fixing device of measuring reinforcing bar and concrete adhesive property, it is characterized in that: comprise outside framework (1), upper padding plate (6), hydraulic oil pump (7), oil inlet pipe (8), scavenge pipe (9), hollow lifting jack (10), concrete sample (11), reinforcing bar, outside framework (1) comprises side plate (2), base plate (3), top board (4), base plate (3), top board (4), two blocks of side plates (2) are steel plate in aggregates by welding structure, surface of steel plate adopts zinc-plated processing, the middle part of base plate (3) has U-lag, the opening of U-lag forward or backwards, reinforcing bar middle part is arranged in concrete sample (11), the top of concrete sample (11) is stretched out on reinforcing bar top (12), the bottom of concrete sample (11) is stretched out in reinforcing bar bottom (13), concrete sample (11) is placed on base plate (3), reinforcing bar bottom (13) is passed and is stretched out downwards from base plate (3) from U-lag, upper padding plate has through hole on (6), upper padding plate (6) is placed on the top of concrete sample (11), reinforcing bar top (12) passes and protrudes upward from upper padding plate (6) from the through hole of upper padding plate (6), the bottom of hollow lifting jack (10) is placed on upper padding plate (6), the top of hollow lifting jack (10) contacts with top board (4), there is through hole at the center of hollow lifting jack (10), reinforcing bar top (12) is positioned at the through hole of hollow lifting jack (10), hydraulic oil pump (7) is connected with hollow lifting jack (10) by oil inlet pipe (8) and scavenge pipe (9).
2. device according to claim 1, it is characterized in that: also comprise coupling bolt (5), hydraulic chuck, load transducer, displacement measuring device, top board has threaded hole on (4), coupling bolt (5) is arranged in threaded hole, coupling bolt (5) is connected with load transducer, reinforcing bar bottom (13) is connected with hydraulic chuck, and displacement measuring device is connected with hydraulic chuck.
3. device according to claim 1, is characterized in that: reinforcing bar top (12) are positioned on the central shaft of hollow lifting jack (10).
4. device according to claim 1, is characterized in that: hydraulic oil pump (7) has dead load function.
CN201310578387.4A 2013-11-19 2013-11-19 A kind of hydraulic fixing device measuring reinforcing bar and concrete adhesive property CN103645133B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310578387.4A CN103645133B (en) 2013-11-19 2013-11-19 A kind of hydraulic fixing device measuring reinforcing bar and concrete adhesive property

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Application Number Priority Date Filing Date Title
CN201310578387.4A CN103645133B (en) 2013-11-19 2013-11-19 A kind of hydraulic fixing device measuring reinforcing bar and concrete adhesive property

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CN103645133A true CN103645133A (en) 2014-03-19
CN103645133B CN103645133B (en) 2015-10-21

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103900954A (en) * 2014-03-24 2014-07-02 西安建筑科技大学 Device for testing bonding slippage of bamboo structure
CN104833631A (en) * 2015-02-04 2015-08-12 三峡大学 Self-balancing reinforced concrete bonding and anchoring performance test instrument
CN106483068A (en) * 2016-12-20 2017-03-08 河海大学 A kind of reciprocal method of testing for loading lower basalt fibre muscle and concrete dynamic adhesion performance
CN109709032A (en) * 2019-01-04 2019-05-03 浙江大学 A kind of dynamic adhesion performance testing device based on Hopkinson pressure bar emitter

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006329974A (en) * 2005-03-31 2006-12-07 Kajima Road Co Ltd Adhesion test method and adhesion test tool used for it
CN102519871A (en) * 2011-11-25 2012-06-27 北京交通大学 Method and device for measuring bonding strength between reinforcing steel and concrete under action of pre-stress
CN102539319A (en) * 2011-12-27 2012-07-04 河海大学 Device and method for directly testing bonding performance of concrete and reinforcing steel bar under action of reciprocating load
CN102879282A (en) * 2012-10-26 2013-01-16 浙江大学 Test piece and method for shear capacity testing of steel-concrete interface shear connecting piece
CN103134750A (en) * 2013-02-01 2013-06-05 河海大学 Steel bar drawing testing device suitable for Hopkinson pressure bar
CN103234902A (en) * 2013-04-23 2013-08-07 金陵科技学院 Device and method for testing adhesive property between fiber reinforce plastic (FRP) rib and concrete under complicated stress state
CN203216831U (en) * 2013-03-21 2013-09-25 河海大学 On-site retrieved member steel bar and concrete bonding property press-in testing device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006329974A (en) * 2005-03-31 2006-12-07 Kajima Road Co Ltd Adhesion test method and adhesion test tool used for it
CN102519871A (en) * 2011-11-25 2012-06-27 北京交通大学 Method and device for measuring bonding strength between reinforcing steel and concrete under action of pre-stress
CN102539319A (en) * 2011-12-27 2012-07-04 河海大学 Device and method for directly testing bonding performance of concrete and reinforcing steel bar under action of reciprocating load
CN102879282A (en) * 2012-10-26 2013-01-16 浙江大学 Test piece and method for shear capacity testing of steel-concrete interface shear connecting piece
CN103134750A (en) * 2013-02-01 2013-06-05 河海大学 Steel bar drawing testing device suitable for Hopkinson pressure bar
CN203216831U (en) * 2013-03-21 2013-09-25 河海大学 On-site retrieved member steel bar and concrete bonding property press-in testing device
CN103234902A (en) * 2013-04-23 2013-08-07 金陵科技学院 Device and method for testing adhesive property between fiber reinforce plastic (FRP) rib and concrete under complicated stress state

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103900954A (en) * 2014-03-24 2014-07-02 西安建筑科技大学 Device for testing bonding slippage of bamboo structure
CN104833631A (en) * 2015-02-04 2015-08-12 三峡大学 Self-balancing reinforced concrete bonding and anchoring performance test instrument
CN104833631B (en) * 2015-02-04 2017-11-17 三峡大学 Self-balancing type armored concrete bond and anchor property tester
CN106483068A (en) * 2016-12-20 2017-03-08 河海大学 A kind of reciprocal method of testing for loading lower basalt fibre muscle and concrete dynamic adhesion performance
CN109709032A (en) * 2019-01-04 2019-05-03 浙江大学 A kind of dynamic adhesion performance testing device based on Hopkinson pressure bar emitter

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