CN204287011U - Shear strength of masonry testing apparatus - Google Patents
Shear strength of masonry testing apparatus Download PDFInfo
- Publication number
- CN204287011U CN204287011U CN201420794386.3U CN201420794386U CN204287011U CN 204287011 U CN204287011 U CN 204287011U CN 201420794386 U CN201420794386 U CN 201420794386U CN 204287011 U CN204287011 U CN 204287011U
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- China
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- web member
- pull bar
- masonry
- afterbody
- groove
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Abstract
A kind of shear strength of masonry testing apparatus, it comprises pull bar, described pull bar comprises head and afterbody, web member is provided with at the head of pull bar, the diameter of web member is greater than the diameter of afterbody, web member end is provided with groove, and slot opening, on the sidewall of web member, is provided with bell mouth shape hole in web member end and is communicated with the groove of web member; The afterbody of pull bar is provided with external thread and coordinates with the first nut, and pull bar is also set with positioning disk and cushion block; Connecting link one end is provided with the ball bumps suitable with the hollow groove on web member, and the other end is provided with the external thread with the second nut screw connection, and connecting link is set with the counter-force supporting seat of hollow structure and the lifting jack of hollow structure; Dynamometer is connected with the sensor electrical be arranged on lifting jack.
Description
Technical field
The utility model relates to a kind of equipment testing shear strength of masonry when destroying along masonry mortar joint in masonry structure.
Background technology
Masonry structure is the common version of China, and comprise brick setting, block masonry, barnacle body, these masonries are built by laying bricks or stones by block mortars such as clay brick, building block, stone materials and formed, and have the features such as cost is low, good stability, extensively adopt in China.A feature of masonry structure be its compressive strength much larger than its tension, shearing strength, the cohesive force between mortar and bulk is more weak, and the ability of opposing masonry straight joint normal tension (straight up) and tangential force (horizontal direction) is poor.Due to the Action of Gravity Field of masonry structure self, masonry straight joint does not generally have normal tension; But China belongs to earthquake prone areas, under the effect of earthquake load, the tangential force of masonry straight joint is often larger.The ability of masonry opposing straight joint tangential force, be determined by the area of masonry straight joint and the tangential cohesive strength of straight joint, thus the tangential cohesive strength of masonry straight joint becomes the important indicator weighing seismic capacity of masonry structure.
In national standard " Standard for test methods of basic mechincal properties of masonry " GB/T 50129-2011, there is masonry along the test method in the tangential cohesive strength in straight joint cross section (shearing strength), the method be by build by laying bricks or stones in advance and the masonry standard shearing resistance test block of Practical Project same material test and obtain, but due to the construction quality, curing condition, human factor etc. between the shearing resistance test block of masonry standard and actual masonry project, there is some difference, therefore the data recorded in standard can not accurately reflect masonry project actual conditions.This test carries out loading to two straight joints simultaneously, with the failing load of first destroy straight joint for research object, has certain uncertainty during detection.
Summary of the invention
In order to make up the deficiency of masonry along mortar joint shearing strength checkout equipment and method, ensure that Hollow Block Masonry Structure Anti-seismic bearing capacity meets safety requirements.
The technical measures that the utility model is taked are: a kind of shear strength of masonry testing apparatus, it comprises pull bar, described pull bar comprises head and afterbody, web member is provided with at the head of pull bar, the diameter of web member is greater than the diameter of afterbody, web member end is provided with groove, and slot opening, on the sidewall of web member, is provided with bell mouth shape hole in web member end and is communicated with the groove of web member; The afterbody of pull bar is provided with external thread and coordinates with the first nut, and pull bar is also set with the positioning disk with center through hole and cushion block; Connecting link one end is provided with the ball bumps suitable with the hollow groove on web member, and the other end is provided with the external thread with the second nut screw connection, and connecting link is set with the counter-force supporting seat of hollow structure and the lifting jack of hollow structure; Dynamometer is connected with the sensor electrical be arranged on lifting jack.
The concrete feature of this programme also has, and the external diameter of positioning disk is suitable with the internal diameter of counter-force supporting seat, and the outer rim of positioning disk and counter-force supporting seat inwall cunning are joined, and move back and forth along pull bar axis.Header to be measured is by after clamping position, and namely the home position of positioning disk is positioned at header end face center.
Cushion block is rectangular parallelepiped, and thickness h is 30mm ~ 50mm, and size and the header face size of width B, length L adapt.
The beneficial effect of this programme does not need other masonries of first destruction part by described in " masonry project onthe technology of site test standard " GB50315-2011 before detecting, do not need to need first core boring sampling processing as " drill core test shear strength of masonry and masonry mortar intensity technique code " yet, the present invention only need hole on tested masonry header, header and periphery masonry is made to produce shear failure, measure maximum shear stress, thus calculating shear strength of masonry, test method is simple and efficient.This programme principle is simple, and little to masonry damage, test figure is stable, method is reliable, is applicable to the test of the tangential cohesive strength of masonry straight joint.Be applicable to all kinds of masonries such as the brick setting of different-thickness, block masonry, barnacle body.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the connecting-piece structure schematic diagram on pull bar;
Fig. 3 is cushion block structure schematic diagram.
In figure: 1-pull bar; 2-first nut; 3-cushion block; 4-positioning disk; 5-counter-force supporting seat; 6-lifting jack; 7-dynamometer; 8-second nut; 9-connecting link; 10-web member; 11-header; 12-through hole; The tested mortar joint of 13-; 14-masonry.
Embodiment
As shown in Figure 1, a kind of shear strength of masonry testing apparatus, it comprises pull bar 1, described pull bar 1 comprises head and afterbody, be provided with web member 10 at the head of pull bar 1, the diameter of web member 10 is greater than the diameter of afterbody, and web member 10 end is provided with groove, slot opening, on the sidewall of web member 10, is provided with in web member 10 end and is communicated with the groove of web member 10 along the axially extended bell mouth shape hole of pull bar 1; The afterbody of pull bar 1 is provided with external thread and coordinates with the first nut 2, and pull bar 1 is also set with positioning disk 4 and cushion block 3.As shown in Figure 2, connecting link 9 one end is provided with the ball bumps suitable with the hollow groove on web member 10, and the other end is provided with the external thread coordinated with the second nut 2, and connecting link 9 is set with the counter-force supporting seat 5 of hollow structure and the lifting jack 6 of hollow structure; Dynamometer 7 is connected with the sensor electrical be arranged on lifting jack 6.
Web member 10 and the first nut 2 coordinate and are used for stationary positioned dish 4 and cushion block 3; Web member 10 establishes groove can be inserted in the ball bumps of connecting link 9 end; The hydraucone shape hole that web member 10 outer end establishes outer imperial palace little, is convenient to connecting link 9 and regulates direction.
The external diameter of positioning disk 4 and the internal diameter of counter-force supporting seat 5 suitable, the outer rim of positioning disk 4 and counter-force supporting seat 5 inwall are sliding joins, and moves back and forth along pull bar 1 axis.Header 11 to be measured is by after clamping position, and namely the home position of positioning disk 4 is positioned at header 11 end face center.
As shown in Figure 3, cushion block 3 with center through hole is rectangular parallelepiped, thickness h is 30mm ~ 50mm, size and header 11 face size of width B, length L adapt, the power that pull bar 1 and the first nut 2 transmit can be uniformly distributed and header 11 end face, avoid header 11 local compression prior to tested mortar joint 13 sheared destruction.
During use, masonry surface decoration layer to be measured is removed, select header 11 as tested position.In end face center, bore the hole run through perpendicular to header 11 end face, be arranged on header by retained part by the order in Fig. 1, wherein cushion block 3 should be fitted on header 11 end face completely.The ball bumps of connecting link 9 is inserted in the groove of web member 10.By counter-force supporting seat 5 through connecting link 9, and be enclosed within outside positioning disk 5, prop up masonry surface.Dynamometer 7 and lifting jack 6 are connected, opens dynamometer 7 and return to zero.Lifting jack 6 is propped up counter-force supporting seat 5 through connecting link 9, and connecting link 9 end tightens the second nut 8.Start lifting jack 6, header 11 is extracted from masonry, record peak pullout load value and bond area.Shear strength of masonry is calculated by peak pullout load value and bond area.
Claims (3)
1. a shear strength of masonry testing apparatus, it comprises pull bar, described pull bar comprises head and afterbody, web member is provided with at the head of pull bar, the diameter of web member is greater than the diameter of afterbody, web member end is provided with groove, and slot opening, on the sidewall of web member, is provided with bell mouth shape hole in web member end and is communicated with the groove of web member; The afterbody of pull bar is provided with external thread and coordinates with the first nut, and pull bar is also set with the positioning disk with center through hole and cushion block; Connecting link one end is provided with the ball bumps suitable with the hollow groove on web member, and the other end is provided with the external thread with the second nut screw connection, and connecting link is set with the counter-force supporting seat of hollow structure and the lifting jack of hollow structure; Dynamometer is connected with the sensor electrical be arranged on lifting jack.
2. shear strength of masonry testing apparatus according to claim 1, is characterized in that the internal diameter of the external diameter of positioning disk and counter-force supporting seat is suitable, the outer rim of positioning disk and counter-force supporting seat inwall is sliding joins, and moves back and forth along pull bar axis.
3. shear strength of masonry testing apparatus according to claim 1, it is characterized in that cushion block is rectangular parallelepiped, thickness h is 30mm ~ 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420794386.3U CN204287011U (en) | 2014-12-16 | 2014-12-16 | Shear strength of masonry testing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420794386.3U CN204287011U (en) | 2014-12-16 | 2014-12-16 | Shear strength of masonry testing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204287011U true CN204287011U (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420794386.3U Expired - Fee Related CN204287011U (en) | 2014-12-16 | 2014-12-16 | Shear strength of masonry testing apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN204287011U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067517A (en) * | 2015-09-08 | 2015-11-18 | 北京市房地产科学技术研究所 | In-situ presumption method for shearing strength of masonry mortar |
| CN105424507A (en) * | 2016-01-26 | 2016-03-23 | 中国海洋大学 | Situ detection method for shearing resistance of masonry mortar of masonry structure |
| CN106053212A (en) * | 2016-07-29 | 2016-10-26 | 山东省建筑科学研究院 | On-site inspection device and method of shear strength of concrete sandwich wall panel tie piece |
| CN110426294A (en) * | 2019-07-08 | 2019-11-08 | 山东省建筑科学研究院有限公司 | A kind of masonry test specimen shearing strength test device and test method |
-
2014
- 2014-12-16 CN CN201420794386.3U patent/CN204287011U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067517A (en) * | 2015-09-08 | 2015-11-18 | 北京市房地产科学技术研究所 | In-situ presumption method for shearing strength of masonry mortar |
| CN105424507A (en) * | 2016-01-26 | 2016-03-23 | 中国海洋大学 | Situ detection method for shearing resistance of masonry mortar of masonry structure |
| CN105424507B (en) * | 2016-01-26 | 2019-05-17 | 中国海洋大学 | The in-situ detection method of masonry structure masonry mortar shearing strength |
| CN106053212A (en) * | 2016-07-29 | 2016-10-26 | 山东省建筑科学研究院 | On-site inspection device and method of shear strength of concrete sandwich wall panel tie piece |
| CN110426294A (en) * | 2019-07-08 | 2019-11-08 | 山东省建筑科学研究院有限公司 | A kind of masonry test specimen shearing strength test device and test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20161216 |
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| CF01 | Termination of patent right due to non-payment of annual fee |