CN102768155A - 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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- CN102768155A CN102768155A CN2012102614884A CN201210261488A CN102768155A CN 102768155 A CN102768155 A CN 102768155A CN 2012102614884 A CN2012102614884 A CN 2012102614884A CN 201210261488 A CN201210261488 A CN 201210261488A CN 102768155 A CN102768155 A CN 102768155A
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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; Be particularly related to the method that realizes the Mechanics Performance Testing under the two-way principle stress effect of masonry structure, be suitable for measuring the masonry structure of 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, has also obtained certain achievement for the Test Research of masonry structure (body of wall that refers to masonry structure) under the two-way principal compressive stress effect.But; Mechanical property test for masonry structure under other two-way principle stress effects is carried out deficiency; Main cause is to utilize structural experiment chamber conventional equipment and conventional method, does not determine the test method that reasonably applies tension as yet at present, and domestic correlative study does not propose effective solution yet; Cause plane stress strength failure CURVE STUDY achievement with respect 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-way principle stress effects of conventional test testing of equipment masonry structure; The simple machine tool of this test method utilization cooperates hydraulic jack effectively to realize two-way tension and compression principle stress and two-way test of being drawn masonry structure mechanical property under the principle stress effect; Not only solved the problem that the masonry structure tension is difficult for applying, and guaranteed that masonry structure test specimen edge is drawn evenly reliable after applying tension; It is simple and easy to test required instrument and equipment, easy and simple to handle, and process of the test is continuous, measure the result accurately, stable, this test method can be suitable for the test of mechanical property under the two-way principle stress effect of various types of masonry structures.
The objective of the invention is to solve through following technical scheme:
Mechanical test method under the two-way principle stress effect of this masonry structure, according to following steps:
(1) dust removal of polishing of masonry test specimen bonded part is handled;
(2) will connect and smear high-strength adhesive after the steel plate end polishing and link to each other with masonry test specimen bonded part;
(3) will connect steel plate and masonry test specimen and adopt fixedly moulding of rough ground;
(4) will connect steel plate is connected with pulley blocks;
(5) in test masonry test specimen bonded part is applied pulling force, the value of the suffered pulling force in masonry test specimen bonded part in the control test.
Said step (1) is meant: the bonded part of masonry structure test specimen is confirmed in the position according to tension applies, and does corresponding polishing and dedusting; After masonry structure test specimen construction molding finishes, with the angle grinding machine both sides, two sides before and after the test specimen and connecting elements bonding part are polished flat, again with the acetone wiping to remove surface dust, maintenance adhesive surface clean dry is with the enhancing bond effect.
Said step (2) is meant: the pulling force that the JGN type building structure adhesive that will prepare in advance evenly spreads upon the test specimen both sides transmits the position.
Said step (3) is meant: connecting steel plate thickness is that 4mm, end are drilled with bolt connecting hole in advance; The end that the connection steel plate is connected with test specimen is evenly smeared cementing agent; Locate with the rough ground compacting of end perforate after being bonded in test specimen two ends sidepiece; The rough ground both sides are constantly fastening with lead screw, extrude from connecting the steel plate side up to cementing agent, can be judged to be bonding and put in place.
Said step (4) is meant: the apparatus that applies pulling force is that rated load weight is 5 tons a pulley blocks; The pulley jack that will have sensor through transition connecting plate be connected steel plate and link to each other; The effect of transition connecting plate is to guarantee that the concentrated pulling force with masonry test specimen central axis place converts the two strands of pulling force in connection steel plate three branch places into, to realize the homogeneity of the pulling force that the connection steel plate applies along the test specimen edge.
Said step (5) is meant: after accomplishing above-mentioned preliminary work, begin to carry out the mechanical property test under the effect of the two-way tension and compression principle stress of masonry structure; The process of test adopts manpower to load the method that cooperates sensor control, applies the value of pulling force according to the size monitoring in real time of data collecting instrument upper stress numerical value.
The invention has the beneficial effects as follows: the present invention proposes the practical approach that solves the mechanical property test gordian technique under the effect of the two-way tension and compression principle stress of masonry structure, and can in the mechanical property test under the multiple stress of various structured materials, promote.Consider at the existing experimental facilities of masonry structure surface by utilizing to be difficult to directly it applied pulling force that the present invention considers to adopt the thinking of indirect transfer pulling force to accomplish the loading of stress.At first through cementing agent with the masonry structure test piece end with drawn connecting elements that effective adhesive is arranged, to guarantee effective transmission of pulling force in the experimentation; Secondly be connected with the plant equipment that produces pulling force through the other end of high-strength bolt, the sensor that is used for measuring the pulling force value is set between the two connecting elements; The plant equipment that will produce pulling force at last is fixed on the rigidity bigger counter force wall or reaction frame, thereby solves the problem that applies pulling force on masonry structure member border.
Embodiment
In the face of doing, the present invention describes in further detail down.
Consider at the existing experimental facilities of masonry structure surface by utilizing to be difficult to directly it applied pulling force that the present invention considers to adopt the thinking of indirect transfer pulling force to accomplish the loading of stress.At first through cementing agent with the masonry structure test piece end with drawn connecting elements that effective adhesive is arranged, to guarantee effective transmission of pulling force in the experimentation; Secondly be connected with the plant equipment that produces pulling force through the other end of high-strength bolt, the sensor that is used for measuring the pulling force value is set between the two connecting elements; The plant equipment that will produce pulling force at last is fixed on the rigidity bigger counter force wall or reaction frame, thereby solves the problem that applies pulling force on masonry structure member border.
The technical scheme that the present invention realizes is:
(1) bonded part of masonry structure test specimen is confirmed in the position that applies according to tension, and does technical finesse work such as corresponding polishing and dedusting.
After masonry structure test specimen construction molding finishes, with the angle grinding machine both sides, two sides before and after the test specimen and connecting elements bonding part are polished flat, again with the acetone wiping to remove surface dust, maintenance adhesive surface clean dry is with the enhancing bond effect.
(2) transmit the position at masonry test specimen pulling force and smear high-strength binding material.
The pulling force that the cementing agent for preparing is in advance evenly spread upon the test specimen both sides transmits the position.It is JGN type building structure adhesive that the present invention selects cementing agent for use; It uses comparatively extensive in the concrete strengthening field; Cohesive strength has test effect preferably, can reach to satisfy the ultimate tensile strength (UTS) requirement that the mechanical property test under the two-way principle stress effect of masonry structure is effectively carried out.
(3) transmit the position at masonry test specimen pulling force and arrange the connecting elements of moulding in advance, and take fixation reliably.
The connecting elements that the present invention selected for use is that thickness is the steel plate that 4mm, end are drilled with bolt connecting hole in advance.The end that steel plate is connected with test specimen is evenly smeared cementing agent, is bonded in behind the sidepiece of test specimen two ends with the rough ground compacting location of end perforate, and the rough ground both sides are constantly fastening with lead screw, extrude from the steel plate side up to cementing agent, can be judged to be bonding and putting in place.
(4) connecting steel plate is connected with the plant equipment that produces pulling force.
It is that rated load weight is 5 tons a pulley blocks that the present invention selects the apparatus that applies pulling force for use.The pulley jack that will have sensor through transition connecting plate be connected steel plate and link to each other; The effect of transition connecting plate is to guarantee that the concentrated pulling force with masonry test specimen central axis place converts the two strands of pulling force in connection steel plate three branch places into, to realize that the pulling force that the connection steel plate applies along the test specimen edge is uniform.
(5) applying biaxial stress synchronously makes an experiment.
After accomplishing above-mentioned preliminary work, begin to carry out the mechanical property test under the effect of the two-way tension and compression principle stress of masonry structure.The process of test adopts manpower to load the method that cooperates sensor control, can monitor the value that applies pulling force constantly according to the size of data collecting instrument upper stress numerical value, and its data precision can satisfy the requirement of engineering test fully.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction; Though the present invention discloses as above with preferred embodiment; Yet be not in order to limiting the present invention, anyly be familiar with the professional and technical personnel, in not breaking away from technical scheme scope of the present invention; When the method for above-mentioned announcement capable of using and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations; In every case be the content that does not break away from technical scheme of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.
Claims (6)
1. the mechanical test method under the two-way principle stress effect of masonry structure is characterized in that, according to following steps:
(1) dust removal of polishing of masonry test specimen bonded part is handled;
(2) constructing operation is carried out in masonry test specimen bonded part, will connect and smear high-strength adhesive after polishing in the steel plate end;
(3) will connect steel plate and masonry test specimen and adopt fixedly moulding of rough ground;
(4) will connect steel plate is connected with pulley blocks;
(5) in test masonry test specimen bonded part is applied pulling force; The suffered pulling force in masonry test specimen bonded part in the control test.
2. mechanical test method as claimed in claim 1 is characterized in that, said step (1) is meant: the bonded part of masonry structure test specimen is confirmed in the position according to tension applies, and does corresponding polishing and dedusting; After masonry structure test specimen construction molding finishes, with the angle grinding machine both sides, two sides before and after the test specimen and connecting elements bonding part are polished flat, again with the acetone wiping to remove surface dust, maintenance adhesive surface clean dry is with the enhancing bond effect.
3. mechanical test method as claimed in claim 1 is characterized in that, said step (2) is meant: the pulling force that the JGN type building structure adhesive that will prepare in advance evenly spreads upon the test specimen both sides transmits the position.
4. mechanical test method as claimed in claim 1 is characterized in that, said step (3) is meant: connecting steel plate thickness is that 4mm, end are drilled with bolt connecting hole in advance; The end that the connection steel plate is connected with test specimen is evenly smeared cementing agent; Locate with the rough ground compacting of end perforate after being bonded in test specimen two ends sidepiece; The rough ground both sides are constantly fastening with lead screw, extrude from connecting the steel plate side up to cementing agent, can be judged to be bonding and put in place.
5. mechanical test method as claimed in claim 1 is characterized in that, said step (4) is meant: the apparatus that applies pulling force is that rated load weight is 5 tons a pulley blocks; The pulley jack that will have sensor through transition connecting plate be connected steel plate and link to each other; The effect of transition connecting plate is to guarantee that the concentrated pulling force with masonry test specimen central axis place converts the two strands of pulling force in connection steel plate three branch places into, to realize the homogeneity of the pulling force that the connection steel plate applies along the test specimen edge.
6. mechanical test method as claimed in claim 1 is characterized in that, said step (5) is meant: after accomplishing above-mentioned preliminary work, begin to carry out the mechanical property test under the effect of the two-way tension and compression principle stress of masonry structure; The process of test adopts manpower to load the method that cooperates sensor control, applies the value of pulling force according to the size monitoring in real time of data collecting instrument upper stress numerical value.
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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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| CN102768155B CN102768155B (en) | 2015-02-18 |
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Citations (6)
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| 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)
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|---|---|---|---|---|
| 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 (4)
| Title |
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| 《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 孙忠祥 灌芯混凝土砌块砌体在双向受力下的破坏准则 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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