CN102768155B - Mechanical performance test method of masonry structure under effect of bidirectional principal stress - Google Patents
Mechanical performance test method of masonry structure under effect of bidirectional principal stress Download PDFInfo
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- CN102768155B CN102768155B CN201210261488.4A CN201210261488A CN102768155B CN 102768155 B CN102768155 B CN 102768155B CN 201210261488 A CN201210261488 A CN 201210261488A CN 102768155 B CN102768155 B CN 102768155B
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Abstract
The invention discloses a mechanical performance test method of a masonry structure under the effect of a bidirectional principal stress. The test method comprises the steps: (1) polishing and dedusting a bonding part of a masonry test piece; (2) constructing the bonding part of the masonry test piece and coating a high strength adhesive on the end part of a connecting steel plate; (3) fixing and moulding the connecting steel plate and the masonry test piece by a rough ground; (4) connecting the connecting steel plate and a pulley block; and (5) applying tension to the bonding part of the masonry test piece and controlling the tension applied to the bonding part of the masonry test piece in the test. With the adoption of the method provided by the invention, not only the problem that the tensile stress of the masonry structure is not easy to apply is solved, but also the condition that the edge of the masonry structure test piece is stressed uniformly and reliably after tensile stress is applied. Instruments and devices required by the test are simple and simple and convenient to operate, the test process is continuous, and the test result is accurate and stable. The mechanical performance test method of the masonry structure under the effect of the bidirectional principal stress provided by the invention is suitable for test of mechanical performance of masonry structures in various types under the effect of the bidirectional principal stress.
Description
Technical field
The present invention relates to a kind of masonry structure mechanical test method, in particular to the method for the Mechanics Performance Testing realized under masonry structure two-direction, main effect of stress, be suitable for the masonry structure measuring the various material types such as common brick, hollow brick, concrete segment.
Background technology
At present, the test method of research masonry structure uniaxial stressed state is comparatively ripe, and the Test Research for masonry structure under two-direction, main action of compressive stress (referring to the body of wall of masonry structure) also achieves certain achievement.But, deficiency is carried out for the mechanical property test of masonry structure under other two-direction, main effect of stress, main cause is to utilize structural experiment room conventional equipment and conventional method, not yet determine the test method reasonably applying tension at present, domestic correlative study does not propose effective solution yet, cause the plane stress strength failure CURVE STUDY achievement relative to xoncrete structure, masonry structure research secular stagnation in this regard not before.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of under the condition of conventional structure test, utilize the test method of the mechanical property under the various two-direction, main effect of stress of conventional test testing of equipment masonry structure, this test method utilizes simple machine tool to coordinate hydraulic jack effectively to achieve the test of masonry structure mechanical property under two-direction pull press principle stress and the effect of two-way tension principle stress, not only solve the problem that masonry structure tension not easily applies, and ensure that masonry structure test specimen edge tension is evenly reliable after applying tension, the required instrument and equipment of test is simple and easy, easy and simple to handle, and process of the test is continuous, measurement result accurately, stable, this test method can be suitable for the test of mechanical property under the two-direction, main effect of stress of various types of masonry structure.
The object of the invention is to solve by the following technical programs:
Mechanical test method under this masonry structure two-direction, main effect of stress, in accordance with the following steps:
(1) polishing dust removal process is carried out to masonry test specimen bonded part;
(2) smear high-strength adhesive after being polished junction steel plate end to be connected with masonry test specimen bonded part;
(3) adopt rough ground fixed-type junction steel plate and masonry test specimen;
(4) junction steel plate is connected with pulley blocks;
(5) in test pulling force is applied to masonry test specimen bonded part, the value of pulling force suffered by masonry test specimen bonded part in Control experiment.
Described step (1) refers to: the bonded part determining masonry structure test specimen according to the position of tension applying, and does corresponding polishing and dedusting; After masonry structure test specimen construction molding, with angle grinding machine, both sides, two sides before and after test specimen and connecting elements bonding part are polished flat, then with acetone wiping to remove surface dust, keep adhesive surface clean dry, to strengthen bond effect.
Described step (2) refers to: by the JGN type building structure adhesive uniform application for preparing the in advance pull transfer position in test specimen both sides.
Described step (3) refers to: junction steel plate thickness is 4mm, end is drilled with bolt connecting hole in advance; One end uniform application cementing agent that junction steel plate is connected with test specimen, locate with the rough ground compacting of end perforate after being bonded in test specimen two ends sidepiece, rough ground both sides lead screw is constantly fastening, until cementing agent is extruded from junction steel plate side, can be judged to be that bonding puts in place.
Described step (4) refers to: to apply the apparatus of pulling force be rated load weight is the pulley blocks of 5 tons; By transition connecting plate, the pulley jack with sensor is connected with junction steel plate, the effect of transition connecting plate is to ensure the concentrated pulling force at masonry test specimen central axis place to be converted to two strands, junction steel plate three branch place pulling force, to realize the homogeneity of the pulling force that junction steel plate applies along test specimen edge.
Described step (5) refers to: after completing above-mentioned preliminary work, start to carry out the mechanical property test under the effect of masonry structure two-direction pull press principle stress; The process of test adopts manpower to load the method coordinating sensor to control, and monitors the value applying pulling force according to the size of data collecting instrument upper stress numerical value in real time.
The invention has the beneficial effects as follows: the practical approach that the present invention proposes the mechanical property test gordian technique under the effect of solution masonry structure two-direction pull press principle stress, and can promote in the mechanical property test under the multiple effect of stress of various structured material.Consider and to utilize on masonry structure surface existing experimental facilities to be difficult to directly apply pulling force to it, the present invention considers to adopt the thinking of indirect transfer pulling force to complete the loading of stress.First by cementing agent, masonry structure test piece end and tension connecting elements there is effective adhesive, to ensure effective transmission of pulling force in experimentation; Secondly by high-strength bolt, the other end of connecting elements is connected with the plant equipment producing pulling force, the sensor being used for measuring pulling force value is set between the two; Finally the plant equipment producing pulling force is fixed on the larger counter force wall of rigidity or reaction frame, thus solves the problem applying pulling force on masonry structure component border.
Embodiment
Below the present invention is described in further detail.
Consider and to utilize on masonry structure surface existing experimental facilities to be difficult to directly apply pulling force to it, the present invention considers to adopt the thinking of indirect transfer pulling force to complete the loading of stress.First by cementing agent, masonry structure test piece end and tension connecting elements there is effective adhesive, to ensure effective transmission of pulling force in experimentation; Secondly by high-strength bolt, the other end of connecting elements is connected with the plant equipment producing pulling force, the sensor being used for measuring pulling force value is set between the two; Finally the plant equipment producing pulling force is fixed on the larger counter force wall of rigidity or reaction frame, thus solves the problem applying pulling force on masonry structure component border.
The technical scheme that the present invention realizes is:
(1) bonded part of masonry structure test specimen is determined in the position applied according to tension, and does the technical finesse work such as corresponding polishing and dedusting.
After masonry structure test specimen construction molding, with angle grinding machine, both sides, two sides before and after test specimen and connecting elements bonding part are polished flat, then with acetone wiping to remove surface dust, keep adhesive surface clean dry, to strengthen bond effect.
(2) high-strength binding material is smeared at masonry test specimen pull transfer position.
By the cementing agent uniform application for preparing the in advance pull transfer position in test specimen both sides.The present invention selects cementing agent to be JGN type building structure adhesive, it applies comparatively extensive in concrete strengthening field, cohesive strength has good test effect, can reach the ultimate tensile strength (UTS) requirement that the mechanical property test met under masonry structure two-direction, main effect of stress is effectively carried out.
(3) arrange connecting elements shaping in advance at masonry test specimen pull transfer position, and take reliably fixation.
Connecting elements selected by the present invention is thickness is the steel plate that 4mm, end are drilled with bolt connecting hole in advance.One end uniform application cementing agent that steel plate is connected with test specimen, locate with the rough ground compacting of end perforate after being bonded in test specimen two ends sidepiece, rough ground both sides lead screw is constantly fastening, until cementing agent is extruded from steel plate side, can be judged to be that bonding puts in place.
(4) junction steel plate is connected with the plant equipment producing pulling force.
The selected apparatus applying pulling force of the present invention to be rated load weight the be pulley blocks of 5 tons.By transition connecting plate, the pulley jack with sensor is connected with junction steel plate, the effect of transition connecting plate is to ensure the concentrated pulling force at masonry test specimen central axis place to be converted to two strands, junction steel plate three branch place pulling force, and the pulling force applied along test specimen edge to realize junction steel plate is uniform.
(5) the synchronous biaxial stress that applies is tested.
After completing above-mentioned preliminary work, start to carry out the mechanical property test under the effect of masonry structure two-direction pull press principle stress.The process of test adopts manpower to load the method coordinating sensor to control, and can monitor according to the size of data collecting instrument upper stress numerical value the value applying pulling force constantly, its data precision can meet the requirement of engineering test completely.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when the method and technology contents that can utilize above-mentioned announcement are made a little change or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, still belong in the scope of technical solution of the present invention.
Claims (1)
1. the mechanical test method under masonry structure two-direction, main effect of stress, it is characterized in that, step is as follows:
(1) dust removal process of polishing is carried out to masonry test specimen bonded part: the bonded part determining masonry structure test specimen according to the position of tension applying, and do corresponding polishing and dedusting; After masonry structure test specimen construction molding, with angle grinding machine, both sides, two sides before and after test specimen and connecting elements bonding part are polished flat, then with acetone wiping to remove surface dust, keep adhesive surface clean dry, to strengthen bond effect;
(2) constructing operation is carried out to masonry test specimen bonded part; High-strength adhesive is smeared: by the JGN type building structure adhesive uniform application for preparing the in advance pull transfer position in test specimen both sides after being polished junction steel plate end;
(3) adopt rough ground fixed-type junction steel plate and masonry test specimen: junction steel plate thickness is 4mm, end is drilled with bolt connecting hole in advance; One end uniform application cementing agent that junction steel plate is connected with test specimen, locate with the rough ground compacting of end perforate after being bonded in test specimen two ends sidepiece, rough ground both sides lead screw is constantly fastening, until cementing agent is extruded from junction steel plate side, is namely judged to be that bonding puts in place;
(4) junction steel plate is connected with pulley blocks: to apply the apparatus of pulling force be rated load weight is the pulley blocks of 5 tons; By transition connecting plate, the pulley jack with sensor is connected with junction steel plate, the effect of transition connecting plate is to ensure the concentrated pulling force at masonry test specimen central axis place to be converted to two strands, junction steel plate three branch place pulling force, to realize the homogeneity of the pulling force that junction steel plate applies along test specimen edge;
(5) in test pulling force is applied to masonry test specimen bonded part; Pulling force suffered by masonry test specimen bonded part in Control experiment; After completing steps (1) to (4), start to carry out the mechanical property test under the effect of masonry structure two-direction pull press principle stress; The process of test adopts manpower to load the method coordinating sensor to control, and monitors the value applying pulling force according to the size of data collecting instrument upper stress numerical value in real time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210261488.4A CN102768155B (en) | 2012-07-26 | 2012-07-26 | Mechanical performance test method of masonry structure under effect of bidirectional principal stress |
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| CN201210261488.4A CN102768155B (en) | 2012-07-26 | 2012-07-26 | Mechanical performance test method of masonry structure under effect of bidirectional principal stress |
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| CN102768155A CN102768155A (en) | 2012-11-07 |
| CN102768155B true CN102768155B (en) | 2015-02-18 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059031A (en) * | 1990-08-17 | 1992-02-26 | 辽宁省建筑科学研究所 | Strength test of building brick |
| CN101149332A (en) * | 2007-11-09 | 2008-03-26 | 北京工业大学 | Device and method for testing rubber aggregate and cement stone interface binding intensity |
| US7415890B2 (en) * | 2003-11-13 | 2008-08-26 | Deslauriers, Inc. | Unbonded system for strength testing of concrete masonry units |
| CN101419143A (en) * | 2008-11-21 | 2009-04-29 | 同济大学 | Bidirectional composite force loading test device for masonry test piece |
| CN101458183A (en) * | 2007-12-11 | 2009-06-17 | 郝亮 | Mechanical property detecting method for shale porous brick masonry |
| CN102323157A (en) * | 2011-07-27 | 2012-01-18 | 大连理工大学 | Concrete multi-shaft tension compression stress combination testing method |
-
2012
- 2012-07-26 CN CN201210261488.4A patent/CN102768155B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059031A (en) * | 1990-08-17 | 1992-02-26 | 辽宁省建筑科学研究所 | Strength test of building brick |
| US7415890B2 (en) * | 2003-11-13 | 2008-08-26 | Deslauriers, Inc. | Unbonded system for strength testing of concrete masonry units |
| CN101149332A (en) * | 2007-11-09 | 2008-03-26 | 北京工业大学 | Device and method for testing rubber aggregate and cement stone interface binding intensity |
| CN101458183A (en) * | 2007-12-11 | 2009-06-17 | 郝亮 | Mechanical property detecting method for shale porous brick masonry |
| CN101419143A (en) * | 2008-11-21 | 2009-04-29 | 同济大学 | Bidirectional composite force loading test device for masonry test piece |
| CN102323157A (en) * | 2011-07-27 | 2012-01-18 | 大连理工大学 | Concrete multi-shaft tension compression stress combination testing method |
Non-Patent Citations (2)
| Title |
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| FRP与砌体界面的粘结承载力;郑怡等;《沈阳建筑大学学报(自然科学版)》;20100131;第26卷(第1期);27－30 * |
| 灌芯混凝土砌块砌体在双向受力下的破坏准则;孙忠祥;《新型砌体结构体系与墙体材料——配筋砌块砌体研究成果汇编》;20101231;32-43 * |
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Effective date of registration: 20190822 Address after: Room 117, Building Materials Building No. 13 Yanta Road, Beilin District, Xi'an City, Shaanxi Province Patentee after: Xi'an Construction Technology University Engineering Co.,Ltd. Address before: 710055 Shaanxi province Xi'an Yanta Road No. 13 Patentee before: XIAN University OF ARCHITECTURE AND TECHNOLOG |
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