CN102680321A - Lever-type drawing device for testing anchoring performance of planting bar and implementation method thereof - Google Patents
Lever-type drawing device for testing anchoring performance of planting bar and implementation method thereof Download PDFInfo
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- CN102680321A CN102680321A CN201210157216XA CN201210157216A CN102680321A CN 102680321 A CN102680321 A CN 102680321A CN 201210157216X A CN201210157216X A CN 201210157216XA CN 201210157216 A CN201210157216 A CN 201210157216A CN 102680321 A CN102680321 A CN 102680321A
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- rigid beam
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Abstract
The invention relates to a lever-type drawing device for testing the anchoring performance of a planting bar and an implementation method thereof, which specifically belongs to the technical field of the reinforcement modification of civil engineering. The lever-type drawing device for testing the anchoring performance of the planting bar comprises a lever force measuring device which is arranged above a concrete substrate, wherein the lever force measuring device comprises a rigid crossbeam, a support point part of the rigid crossbeam is hinged with a support saddle, the lower end of the support saddle is rigidly connected with a pull pressure sensor, the other end of the pull pressure sensor is rigidly connected with the concrete substrate, one end of the rigid crossbeam is fixedly connected with the planting bar through a connection member, and the other end of the rigid crossbeam is connected with a loading device. Based on the lever principle and combining the equipment such as the pressure sensor, the drawing device for testing the anchoring performance of the chemical planting bar which is anchored in the concrete substrate and the implementation method thereof have remarkable advantages compared with the traditional method for testing the stress performance of an anchoring connection node.
Description
Technical field
The present invention relates to a kind of lever draw-off gear and implementation method thereof that is used for the test of bar planting anchoring property; Specifically relate to a kind of based on lever principle; In conjunction with equipment such as pressure transducers; Be anchored in the draw-off gear and the implementation method thereof of the chemically-planted steel bar anchoring property in the concrete substrate after the test, belong to civil engineering work strengthening reconstruction technical field.
Background technology
Bar planting " technology be one simpler and more direct to xoncrete structure, effectively connect and anchorage technology; Implantable regular reinforcement, also implantable bolt type dowel; The strengthening and rebuilding engineering that at present has been widely used in existing building; As: leak in the construction and bury remedying of reinforcing bar or reinforcing bar off-design position; The benefit muscle that the member enlarging section is reinforced; Superstructure expand stride, jacking is to the spreading of beam, post, overbuilding story connects the bar planting etc. that post and skyscraper are set up shear wall.
It is extensive day by day to be accompanied by the application of concrete post anchoring technology in concrete structure reinforcement is transformed; Method of testing to back anchor connection node stress performance also becomes the emphasis that engineering technical personnel pay close attention to, and is anchored in the chemically-planted steel bar anchoring property in the concrete substrate after especially.Draw-off gear is used in existing chemically-planted steel bar anchoring property test; Great majority are to design with reference to " concrete structure reinforcement design specifications " GB50367-2006 appendix K; Promptly adopt equipment such as feed-through hydraulic lifting jack, pressure transducer and top clamp that chemically-planted steel bar is carried out drawing; Require the center of feed-through hydraulic lifting jack and pressure transducer to overlap during the assembling of this draw-off gear with the chemically-planted steel bar center; There is following shortcoming in this draw-off gear when being used to test the bar planting anchoring property: first: under constraint condition, measure the anchoring property of chemically-planted steel bar, can not reflect the actual anchoring property of chemically-planted steel bar under the unconfined condition; Second: because chemically-planted steel bar carries out anchoring after passing feed-through hydraulic lifting jack and pressure transducer again, long higher coupling sleeve of intensity and the drawing device muscle of maybe need being equipped with of required chemically-planted steel bar protruded length; The the 3rd: during practical operation,, cause chemically-planted steel bar to bear the stretch bending acting in conjunction because there is deviation in the center of punching lifting jack and bar planting; The 4th: because the very heavy lotus less stable that holds of feed-through hydraulic, this device should not be used to measure under the action of long-term load owing to the influence of bar planting glue creep to anchoring property; The the 5th: when actual anchoring property is tested, can produce bounce-back, may cause proving installation damage or injury to personnel etc. because chemically-planted steel bar is broken.
The shortcoming that can not reflect the actual anchoring property of chemically-planted steel bar under the unconfined condition to the said apparatus test result; Prior art personnel take the technical measures of built on stilts feed-through hydraulic lifting jack; Promptly between above-mentioned draw-off gear and concrete substrate, set up overheat rigid and support (gooseneck etc.); Though the proving installation after improving can solve the anchoring property test problem under the unconfined condition; But all the other shortcomings still exist, and owing to set up rigid support, the device after the improvement is not suitable for the anchoring property test under the comparatively intensive situation of bar planting.
Summary of the invention
For overcoming the deficiency of existing bar planting anchoring property test with draw-off gear, the present invention provides a kind of bar planting anchoring property based on lever principle to test with draw-off gear and implementation method thereof.
A kind of lever draw-off gear that is used for the test of bar planting anchoring property; Comprise that one is arranged on the lever device for measuring force of concrete substrate top; Said lever device for measuring force comprises rigid beam; The hinged bearing of the fulcrum location of said rigid beam, the lower end of the said bearing tension-compression sensor that has been rigidly connected, the other end and the concrete substrate of said tension-compression sensor are rigidly connected; One end of said rigid beam is fixedly connected with bar planting through web member, and the other end of said rigid beam is connected with charger.
Have some limit pin holes on the said rigid beam in order; Said bearing is hinged through spacing latch and arbitrary limit pin hole; Connect said tension-compression sensor in the lower end of said bearing, the tension-compression sensor other end is connected with a stiffness bearer, and stiffness bearer is positioned on the concrete substrate.
Said web member comprises the shackle of U type, U type web member, and the shackle of said U type is fixedly connected with bar planting on the concrete substrate through U type web member.
A kind of implementation method that is used for the lever draw-off gear of bar planting anchoring property test comprises following step,
The first step, stiffness bearer, tension-compression sensor and bearing are installed successively on concrete substrate;
Second goes on foot, bearing is connected in the limit pin hole on the rigid beam, and spacing through spacing latch;
The 3rd step, the shackle of U type is installed, and is connected with bar planting through U type web member at rigid beam one end;
The 4th step, connect charger at the other end of rigid beam;
The 5th goes on foot, measures respectively the distance L at bearing center and U type shackle center
1, bearing center and charger center distance L
2, the rigid beam center of gravity is to the distance L at bearing center
3With rigid beam deadweight g;
The 6th step, enforcement hierarchical loading, and write down the charger end payload values G under the loads at different levels respectively
i, measure load G at different levels
iFollowing tension-compression sensor reading value T
i, bar planting end stretch value S
i
The 7th step, try to achieve the pulling capacity F of bar planting system according to tension-compression sensor institute's reading value and force balance principle
i,
F
i=T
i-G
i-g，
Try to achieve the pulling capacity F of bar planting system according to the lever moment equilibrium principle
Mi,
F
Mi=（G
i·L
2+g·L
3）/L
1?；
Get F
iAnd F
MiThe mean value of two values is the actual pulling capacity F of bar planting system
Ri, F
Ri=(F
i+ F
Mi)/2;
Wherein, i=1,2 ..., N;
The actual pulling capacity F of bar planting system that the 8th step, basis are repeatedly inferred
RiWith bar planting end stretch value S
iDraw the load-displacement of bar planting system, i.e. F-S curve, the actual anchoring property of evaluation bar planting system.
Beneficial effect: lever draw-off gear and the implementation method thereof that is used for the test of bar planting anchoring property provided by the invention can be brought following advantage:
A, solved the test problem of bar planting anchoring property under unconfined condition;
B, can guarantee that pulling capacity overlaps with the bar planting center in the loading procedure, avoid existing draw-off gear to misalign the adverse effect of bringing;
C, the protruded length of bar planting to be measured is not had specific (special) requirements, and can be used in the bar planting anchoring property test that close quarters is arranged in bar planting;
D, through hanging the method for counterweight at the loading end of apparatus of the present invention, the anchoring property of bar planting can solve hydraulic jack and hold deficiencies such as lotus instability under the test action of long-term load.
The charger of e, device provided by the present invention all separates with chemically-planted steel bar with tension-compression sensor, can avoid because chemically-planted steel bar is broken the problems such as damage of facilities that cause.
F, the present invention is based on lever principle design, under the prerequisite that satisfies chemically-planted steel bar pull-out test load requirement,, can reduce the loading end payload values significantly through controlling rational arm of force ratio.
Description of drawings
Fig. 1 is the lever draw-off gear synoptic diagram that is used for the test of bar planting anchoring property provided by the invention;
Fig. 2 is the lever draw-off gear implementation method synoptic diagram that is used for the test of bar planting anchoring property provided by the invention.
Wherein: 1, concrete substrate; 2, bar planting; 3, U type web member; 4, U type shackle; 5, scalable bearing; 6, tension-compression sensor; 7, stiffness bearer; 8, rigid beam; 9, charger; 10, limit pin hole; 11, spacing latch; L
1, bearing center and U type shackle center distance; L
2, bearing center and charger center distance; L
3, rigid beam center of gravity to bearing center of gravity distance; G, rigid beam deadweight; G
i, charger end payload values; F
i, the bar planting system pulling capacity value of trying to achieve according to tension-compression sensor institute's reading value and force balance principle; T
i, the tension-compression sensor reading value.
Embodiment
Below in conjunction with accompanying drawing and embodiment to further explain of the present invention,
A kind of lever draw-off gear that is used for the test of bar planting anchoring property; Comprise rigid beam, bearing; Have some limit pin holes on the said rigid beam in order, a bearing is fixedly connected with said wherein any limit pin hole through spacing latch, is connected with tension-compression sensor in the lower end of said bearing; The tension-compression sensor other end is connected with stiffness bearer, and stiffness bearer is positioned on the concrete substrate; One end of said rigid beam is equipped with the shackle of U type, and the shackle of said U type is fixedly connected with bar planting on the concrete substrate to be measured through U type web member; The other end of said rigid beam is equipped with charger.
A kind of implementation method that is used for the lever draw-off gear of bar planting anchoring property test comprises following step,
The first step, stiffness bearer, tension-compression sensor and bearing are installed successively on concrete substrate;
Second goes on foot, bearing is connected in the limit pin hole on the rigid beam, and spacing through spacing latch;
The 3rd step, the shackle of U type is installed, and is connected with bar planting through U type web member at rigid beam one end;
The 4th step, connect charger at the other end of rigid beam;
The 5th goes on foot, measures respectively the distance L at bearing center and U type shackle center
1, bearing center and charger center distance L
2, the rigid beam center of gravity is to the distance L at bearing center
3With rigid beam deadweight g;
The 6th step, enforcement hierarchical loading, and write down the charger end payload values G under the loads at different levels respectively
i, measure load G at different levels
iFollowing tension-compression sensor reading value T
i, bar planting end stretch value S
i
The 7th step, try to achieve the pulling capacity F of bar planting system according to tension-compression sensor institute's reading value and force balance principle
i,
F
i=T
i-G
i-g，
Try to achieve the pulling capacity F of bar planting system according to the lever moment equilibrium principle
Mi,
F
Mi=（G
i·L
2+g·L
3）/L
1?；
Get F
iAnd F
MiThe mean value of two values is the actual pulling capacity F of bar planting system
Ri, F
Ri=(F
i+ F
Mi)/2;
Wherein, i=1,2 ..., N;
The actual pulling capacity F of bar planting system that the 8th step, basis are repeatedly inferred
RiWith bar planting end stretch value S
iDraw the load-displacement of bar planting system, i.e. F-S curve, the actual anchoring property of evaluation bar planting system.
Lever draw-off gear and the implementation method thereof that is used for the test of bar planting anchoring property provided by the invention can be brought following advantage:
A, solved the test problem of bar planting anchoring property under unconfined condition;
B, can guarantee that pulling capacity overlaps with the bar planting center in the loading procedure, avoid existing draw-off gear to misalign the adverse effect of bringing;
C, the protruded length of bar planting to be measured is not had specific (special) requirements, and can be used in the bar planting anchoring property test that close quarters is arranged in bar planting;
D, device provided by the present invention design based on lever principle, can reduce the payload values of loading end through adjustment arm of force length ratio significantly;
E, through hanging the method for counterweight at the loading end of apparatus of the present invention, the anchoring property of bar planting can solve hydraulic jack and hold deficiencies such as lotus instability under the test action of long-term load.
The charger of f, device provided by the present invention all separates with chemically-planted steel bar with tension-compression sensor, can avoid because chemically-planted steel bar is broken the problems such as damage of facilities that cause.
Claims (4)
1. one kind is used for the lever draw-off gear that the bar planting anchoring property is tested; It is characterized in that: comprise that one is arranged on the lever device for measuring force of concrete substrate (1) top; Said lever device for measuring force comprises rigid beam (8); The hinged bearing of the fulcrum location of said rigid beam (8) (5), the lower end of said bearing (5) tension-compression sensor (6) that has been rigidly connected, the other end of said tension-compression sensor (6) and concrete substrate (1) are rigidly connected; One end of said rigid beam (8) is fixedly connected with bar planting (2) through web member, and the other end of said rigid beam is connected with charger (9).
2. a kind of lever draw-off gear that is used for the test of bar planting anchoring property according to claim 1; It is characterized in that: have some limit pin holes (10) on the said rigid beam (8) in order; Said bearing (5) is hinged through spacing latch (11) and arbitrary limit pin hole (10); Connect said tension-compression sensor (6) in the lower end of said bearing (5); Tension-compression sensor (6) other end is connected with a stiffness bearer (7), and stiffness bearer (7) is positioned on the concrete substrate (1).
3. a kind of lever draw-off gear that is used for the test of bar planting anchoring property according to claim 1; It is characterized in that: said web member comprises U type shackle (4), U type web member (3), and said U type shackle (4) is fixedly connected with bar planting (2) on the concrete substrate (1) through U type web member (3).
4. a kind of implementation method that is used for the lever draw-off gear of bar planting anchoring property test according to claim 3 is characterized in that: comprise following step,
The first step, stiffness bearer (7), tension-compression sensor (6) and bearing (5) are installed successively on concrete substrate (1);
Second goes on foot, bearing (5) is connected in the limit pin hole on the rigid beam (8), and spacing through spacing latch (11);
The 3rd step, U type shackle (4) is installed, and is connected with bar planting (2) through U type web member (3) at rigid beam (8) one ends;
The 4th step, connect charger (9) at the other end of rigid beam (8);
The 5th goes on foot, measures respectively the distance L at bearing (5) center and U type shackle (4) center
1, bearing (5) center and charger (9) center distance L
2, the distance L at rigid beam (8) center of gravity to bearing (5) center
3And rigid beam (8) deadweight g;
The 6th step, enforcement hierarchical loading, and write down the charger end payload values G under the loads at different levels respectively
i, measure load G at different levels
iFollowing tension-compression sensor reading value T
i, bar planting end stretch value S
i
The 7th step, try to achieve the pulling capacity F of bar planting system according to tension-compression sensor institute's reading value and force balance principle
i,
F
i=T
i-G
i-g，
Try to achieve the pulling capacity F of bar planting system according to the lever moment equilibrium principle
Mi,
F
Mi=（G
i·L
2+g·L
3）/L
1?；
Get F
iAnd F
MiThe mean value of two values is the actual pulling capacity F of bar planting system
Ri, F
Ri=(F
i+ F
Mi)/2;
Wherein, i=1,2 ..., N;
The actual pulling capacity F of bar planting system that the 8th step, basis are repeatedly inferred
RiWith bar planting end stretch value S
iDraw the load-displacement of bar planting system, i.e. F-S curve, the actual anchoring property of evaluation bar planting system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210157216XA CN102680321A (en) | 2012-05-18 | 2012-05-18 | Lever-type drawing device for testing anchoring performance of planting bar and implementation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210157216XA CN102680321A (en) | 2012-05-18 | 2012-05-18 | Lever-type drawing device for testing anchoring performance of planting bar and implementation method thereof |
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|---|---|
| CN102680321A true CN102680321A (en) | 2012-09-19 |
Family
ID=46812585
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210157216XA Pending CN102680321A (en) | 2012-05-18 | 2012-05-18 | Lever-type drawing device for testing anchoring performance of planting bar and implementation method thereof |
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Cited By (14)
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|---|---|---|---|---|
| CN103760027A (en) * | 2014-01-02 | 2014-04-30 | 重庆大学 | Continuous and constant pressure rheological test device for coal rocks |
| CN103868800A (en) * | 2014-04-09 | 2014-06-18 | 上海泛太建筑设计有限公司 | Tensile strength detection device for embedded member of light prefabricated panel |
| CN104236996A (en) * | 2014-07-10 | 2014-12-24 | 李小珍 | Test load force transmission device with adjustable force arm |
| CN104458436A (en) * | 2014-12-24 | 2015-03-25 | 太原理工大学 | High-temperature drawing experiment device of anchoring material and experiment method of high-temperature drawing experiment device |
| CN104729925A (en) * | 2015-02-10 | 2015-06-24 | 浙江大学 | Testing device for testing anti-pulling strength of plant roots outdoors |
| CN104949888A (en) * | 2015-06-05 | 2015-09-30 | 西安建筑科技大学 | Multiscale loading device for recycled concrete long-term crack test |
| CN104949885A (en) * | 2015-06-05 | 2015-09-30 | 西安建筑科技大学 | Loading and measuring device for recycled concrete long-term deformation test |
| CN105510158A (en) * | 2016-01-11 | 2016-04-20 | 河南理工大学 | Anchor solid dynamic tensile testing device and method |
| CN108195617A (en) * | 2018-03-01 | 2018-06-22 | 中国地质调查局南京地质调查中心 | A kind of spiral undisturbed soil sampler of vertical compression and its method of sampling |
| CN109696351A (en) * | 2019-01-21 | 2019-04-30 | 中国林业科学研究院木材工业研究所 | It is a kind of for recombinating the long-term tensile load test device of composite construction bamboo |
| CN110470542A (en) * | 2019-09-12 | 2019-11-19 | 辽宁科技大学 | Hold lotus reinforced beam durability loading device |
| CN110987243A (en) * | 2019-12-10 | 2020-04-10 | 重庆大学 | F-shaped elastic force sensor based on lever principle |
| CN112611553A (en) * | 2020-11-30 | 2021-04-06 | 山东省建筑科学研究院有限公司 | In-situ detection device and method for steel bar sleeve connecting piece |
| CN114199672A (en) * | 2021-12-17 | 2022-03-18 | 青海中利光纤技术有限公司 | Prefabricated excellent extension equipment tension accredited testing organization |
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| CN103760027A (en) * | 2014-01-02 | 2014-04-30 | 重庆大学 | Continuous and constant pressure rheological test device for coal rocks |
| CN103868800A (en) * | 2014-04-09 | 2014-06-18 | 上海泛太建筑设计有限公司 | Tensile strength detection device for embedded member of light prefabricated panel |
| CN104236996A (en) * | 2014-07-10 | 2014-12-24 | 李小珍 | Test load force transmission device with adjustable force arm |
| CN104458436B (en) * | 2014-12-24 | 2017-02-01 | 太原理工大学 | High-temperature drawing experiment device of anchoring material and experiment method of high-temperature drawing experiment device |
| CN104458436A (en) * | 2014-12-24 | 2015-03-25 | 太原理工大学 | High-temperature drawing experiment device of anchoring material and experiment method of high-temperature drawing experiment device |
| CN104729925A (en) * | 2015-02-10 | 2015-06-24 | 浙江大学 | Testing device for testing anti-pulling strength of plant roots outdoors |
| CN104949888A (en) * | 2015-06-05 | 2015-09-30 | 西安建筑科技大学 | Multiscale loading device for recycled concrete long-term crack test |
| CN104949885A (en) * | 2015-06-05 | 2015-09-30 | 西安建筑科技大学 | Loading and measuring device for recycled concrete long-term deformation test |
| CN105510158B (en) * | 2016-01-11 | 2018-04-03 | 河南理工大学 | Anchoring body dynamic tensile test device and experimental method |
| CN105510158A (en) * | 2016-01-11 | 2016-04-20 | 河南理工大学 | Anchor solid dynamic tensile testing device and method |
| CN108195617A (en) * | 2018-03-01 | 2018-06-22 | 中国地质调查局南京地质调查中心 | A kind of spiral undisturbed soil sampler of vertical compression and its method of sampling |
| CN108195617B (en) * | 2018-03-01 | 2023-09-29 | 中国地质调查局南京地质调查中心 | Direct-pressure spiral undisturbed soil sampler and sampling method thereof |
| CN109696351A (en) * | 2019-01-21 | 2019-04-30 | 中国林业科学研究院木材工业研究所 | It is a kind of for recombinating the long-term tensile load test device of composite construction bamboo |
| CN110470542A (en) * | 2019-09-12 | 2019-11-19 | 辽宁科技大学 | Hold lotus reinforced beam durability loading device |
| CN110470542B (en) * | 2019-09-12 | 2024-03-08 | 辽宁科技大学 | Durable loading device for load-holding reinforced concrete beam |
| CN110987243A (en) * | 2019-12-10 | 2020-04-10 | 重庆大学 | F-shaped elastic force sensor based on lever principle |
| CN110987243B (en) * | 2019-12-10 | 2021-07-23 | 重庆大学 | F-shaped elastic force sensor based on lever principle |
| CN112611553A (en) * | 2020-11-30 | 2021-04-06 | 山东省建筑科学研究院有限公司 | In-situ detection device and method for steel bar sleeve connecting piece |
| CN112611553B (en) * | 2020-11-30 | 2022-08-26 | 山东省建筑科学研究院有限公司 | In-situ detection device and method for steel bar sleeve connecting piece |
| CN114199672A (en) * | 2021-12-17 | 2022-03-18 | 青海中利光纤技术有限公司 | Prefabricated excellent extension equipment tension accredited testing organization |
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Application publication date: 20120919 |