CN207423702U - Masonry shear strength device for testing - Google Patents
Masonry shear strength device for testing Download PDFInfo
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- CN207423702U CN207423702U CN201721507083.9U CN201721507083U CN207423702U CN 207423702 U CN207423702 U CN 207423702U CN 201721507083 U CN201721507083 U CN 201721507083U CN 207423702 U CN207423702 U CN 207423702U
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- masonry
- placing groove
- plane
- mold
- cylinder
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Abstract
The utility model is related to masonry shear strength device for testing.Device involved by the utility model includes two molds, and curved surface and axial plane are respectively equipped on two molds, and axial plane is equipped with masonry placing groove.The method of the utility model includes：Masonry to be measured is installed in the first masonry placing groove and the second masonry placing groove of the utility model and is assembled into test block, the gap between horizontal mortar joint to be measured and the first masonry placing groove and the second masonry placing groove on the masonry to be measured is located along the same line；Apply pressure F on the curved surface of the first mold or the second mold0°, the F0°Inceptive direction be located on horizontal mortar joint to be measured；Multiple rotary test block afterwards measures the uniaxial vertical pressure F α under each rotation angle respectively, be computed direct stress and shear stress size, α is rotation angle.The utility model, convenient for changing mortar joint angular dimension, simplifies loading procedure, reduces loading cost by tube-in-tube structure.
Description
Technical field
The utility model belongs to building engineering field, and in particular to a kind of masonry mortar cuts pressure combined strength bination test loading dress
It puts and test method, suitable for all kinds of brick stone block masonries etc..
Background technology
Masonry is a kind of composite material built by laying bricks or stones by bulk and mortar, using very wide in current architectural engineering
It is general.As primary structure member, masonry structure generally not stretching-resisting bending-resisting is main to be pressurized and cut.The masonry structure in actual earthquake
During destruction, often it is in and cuts pressure compound stress.Therefore, test its compound shear strength and have more engineering significance than pure shear.
Masonry cuts pressure composite testing, is the important method for measuring shear behavior of the masonry under different positive pressures.
At present, cut pressure combined strength bination experiment generally use biaxial loadings to realize, but this method can make masonry generate lateral expansion, easily over-evaluate
The ultimate shearing strength of masonry.And existing apparatus carries out cutting for masonry just for a certain specific mortar joint angle and presses experiment, very
Hardly possible realizes the test of the masonry shear strength under different angle.
The content of the invention
The defects of for the prior art or one of deficiency, the purpose of this utility model are to provide a kind of masonry shear strength and survey
Tester.
Device provided by the utility model includes the first mold and the second mold, and first mold is equipped with first surface
With the first axial plane, the first surface is Cylinder Surface, and first axial plane is equipped with the first placing groove of masonry；
Second mold is equipped with the second curved surface and the second axial plane, and second curved surface is Cylinder Surface, and described the
Two axial planes are equipped with the second placing groove of masonry.
In some specific embodiments, first mold of the utility model includes first surface cylinder, the first surface
Cylinder is equipped with first surface, and cohesive body is filled in the first surface cylinder, and the cohesive body is equipped with the first axial plane,
The first placing groove of masonry is offered on first axial plane；Second mold includes the second curved surface cylinder, the second curved surface cylinder
The second curved surface is equipped with, is equipped with the second axial plane filled with cohesive body, the cohesive body in the second curved surface cylinder, this
Two axial planes are equipped with the second placing groove of masonry.
Optionally, the cohesive body material of the utility model is concrete, steel or wood material.
Optionally, the first surface cylinder of the utility model is semi-cylindrical cylinder, and first placing groove of masonry is square
Body；The second curved surface cylinder is semi-cylindrical cylinder, and second placing groove of masonry is cuboid.
Optionally, first mold of the utility model and the second mold are assembled into cylinder, and the first axial plane and
Two axial planes are parallel opposite and are equipped with gap therebetween, first placing groove of masonry and the second placing groove of masonry composition masonry
Placing groove.
Further, the device of the utility model further includes the first backing plate and the second backing plate, and first backing plate is equipped with the
One plane A and the first plane B, second backing plate are equipped with the second plane A and the second plane B, the first plane A and second
Plane A is respectively used to the first mold of installation and the second mold, and the first plane B and the second plane B are used for connecting test instrument.
Preferably, the first plane A of the utility model is equipped with groove, and the second plane A is equipped with groove.
It is using the advantageous effect of above-mentioned technical proposal：
The masonry that the utility model uses cuts pressure device device different from the past, breaches tradition only for a certain specific
What mortar mortar joint angle was carried out cuts pressure experiment.
The utility model test method is convenient for changing mortar joint angular dimension by the semicircle rigid sleeve structure of device, and
Top rigid pressure plate single shaft vertical pressure, which need to be only applied to, can make device simplify loading procedure in pressure combined state is cut,
Reduce loading cost.
Description of the drawings
Fig. 1 is the structure diagram of the utility model.
Fig. 2 is the device to test schematic diagram of the utility model.
Fig. 3 is the direct stress of embodiment and shearing strength graph of relation.
Fig. 4 is the testing result of existing test method.
Specific embodiment
The masonry of the utility model can be specifically brick setting, block masonry, barnacle body etc..
The shearing strength of the utility model refers to：When outer forced direction is parallel with masonry mortar joint, masonry mortar joint interface
The attainable ultimate bearing limit value of shear action institute is born, is usually represented with fy, unit MPa.Work as mortar in the utility model
Belong to pure shearing during angle α=0 ° of mortar joint and uniaxial vertical pressure, there are an angles with uniaxial vertical pressure when mortar joint
When, show to be present with direct stress perpendicular to mortar joint, and direct stress has the shearing strength of mortar joint Different Effects, cuts pressure combined strength bination
Refer to：The shearing strength of masonry under the effect of different direct stress.
Embodiment 1：
As shown in Figure 1, the masonry shear strength device for testing of the embodiment includes two molds (1,2), two molds
On be equipped with curved surface and axial plane, curved surface therein is Cylinder Surface, and axial plane is equipped with masonry placing groove 4.
In some specific embodiments, two molds are curved surface cylinder, and the outer surface of curved surface cylinder is curved surface, in cylinder
Filled with binding material 3, the outer surface of binding material is axial plane, which is equipped with masonry placing groove.It is testing
Rectangle masonry, such as under the occasion of brick setting, which is semicolumn cylinder, masonry placing groove is rectangle
Body.Cohesive body material therein can be high intensity compression-resistant material such as concrete, steel, timber etc..
In some occasions, two molds are assembled into cylinder, and leave gap 6 between two axial planes of the two,
Two masonry placing grooves form complete masonry placing groove.
Consider the size of brick setting, two molds be respectively two independent thickness be 20mm, it is outer diameter 400mm, a height of
The rigid semi-circular sleeve of 365mm.
For convenient test, a backing plate 6 is respectively equipped on two molds, two opposite plane sides on backing plate are for installing
Test equipment, one side are used for installation mold.To ensure the stabilization of mold installation, the plane of installation mold is equipped with groove, mold
In the groove.
Embodiment 2：
Method using the device to test masonry shear strength in above-described embodiment includes
Step 1, as shown in Fig. 2, group in two masonry placing grooves that masonry 7 to be measured is installed on described in above-described embodiment
Dress up test block, the gap 5 between horizontal mortar joint to be measured 8 and two masonry placing grooves on masonry to be measured is located at same straight line
On；
Step 2 applies pressure F on the curved surface of two molds0°, the F0°Inceptive direction be located at horizontal mortar joint to be measured
On；
Step 3, multiple rotary test block, measures the uniaxial vertical pressure F α under each rotation angle respectively afterwards, warp
Calculate direct stress and shear stress size, α is rotation angle.
In general test process, the angle rotated every time in step 3 is identical, every time 10 ° -20 ° of rotation.
When using concrete for binding material, the production method that test specimen is tested in step 1 is：
Two semi-cylindrical cylinders are placed on outside masonry, and chock plug, Zhi Hou are set between two semi-cylindrical cylinders
Masonry surrounding, sleeve interior space casting concrete remove chock plug after concrete curing and obtain test block, the masonry to be measured
On horizontal mortar joint to be measured and the first masonry placing groove and the second masonry placing groove between gap be located along the same line.
One specific test case：By taking ordinary fired brick as an example, building block specification is 240mm × 115mm × 53mm, and mortar is grey
Seam thickness be 10mm, size be offered among the rigid pressure plate 6 of 400mm × 365mm × 40mm size be 160mm ×
The groove of 365mm × 20mm.
Step 1：Experiment is built by laying bricks or stones with pressure combined strength bination test brick setting test specimen is cut, length, width and height size is 240mm × 365mm
× 245mm, and brick setting test specimen is conserved 28 days under standard environment.
Step 2：Brick setting test specimen is uprightly placed, i.e., the test specimen face view overturning in step 1 is vertical view face.
Step 3：It is 20mm by two independent thickness, the rigid semi-circular sleeve of outer diameter 400mm, a height of 365mm
(3) upright placement is separated, the brick setting test specimen of step 2 is placed on, and places two length and width at both ends respectively in separated 10mm
The foam chock plug (6) of high size 80mm × 10mm × 365mm clogs, and is poured afterwards in test specimen surrounding, rigid sleeve (3) inner space
Filling C40 concrete (4) is built, removes foam chock plug after concrete curing shaping strength is formed.
Step 4：Overturning test specimen be positioned over upper and lower two it is block-shaped for cuboid and the rigid pressure plate (5) of intermediate fluting it
Between, and rotate molding device in step 3, rotational angle is the angle of uniaxial vertical pressure and mortar mortar joint, this step with
Exemplified by 30 °, then device centering handled, forcing press can be used afterwards, uniaxial vertical pressure is carried out to masonry test specimen, cut press fitting
It is as shown in Figure 2 to put front view.
Wherein：
1st, the device being further applied load can be any machine that can apply uniaxial vertical pressure, including a variety of Universal motors and
Forcing press；
2nd, there is no limit for the rigid pressure plate of upper and lower both sides and the steel type of semicircle rigid canister；
3rd, uniaxial vertical pressure is transferred to 1 by 6, is transferred to 4 using 3, finally acts on brick setting test specimen；
According to mortar mortar joint angle [alpha] (angle between i.e. uniaxial vertical pressure and mortar mortar joint) and uniaxial vertical pressure F
α can calculate direct stress σ0=F α * cos α/A, fy=F α * sin α/A, then substitute into α=30 ° and A=0.24 × 0.365=
0.0876m2, calculate σ0=F30°* cos30 °/0.0876=9.89F30°, fy=F30°Sin30 °/0.0876=5.71F30°.A is
When mortar mortar joint angle is 0 °, ((mortar is grey for component 8 in Fig. 2 for the area in the masonry test specimen section of uniaxial vertical pressure effect
Stitch) place plane), σ 0 is direct stress, and fy is shearing strength, and the F30 ° of single shaft applied when turning to 30 ° by device is vertical to press
Power remembers F30°。
Masonry test specimen direct stress and shearing strength relation curve, this reality can be drawn according to the size of the variation of α angles and F
Example expands into mortar mortar joint angle [alpha]：It 0 °, 15 °, 30 °, 45 °, 60 °, 75 °, 90 °, that is, makes in 7 same steps three and is molded
Device afterwards.Experiment need to only rotate different mortar mortar joint angle [alpha]s to get to the direct stress and shearing strength of different angle every time
Size further obtains direct stress and shearing strength relation curve, as shown in Figure 3.Masonry is enriched to cut under pressure combined state
Constitutive relation can obtain the different failure laws for cutting shear strength of masonry under pressure assembled state.
Uniaxial vertical pressure F under each rotation angle of the embodimentα, direct stress and value of shearing test result such as table
Shown in 1.
Table 1
| Mortar mortar joint angle [alpha] | 0° | 15° | 30° | 45° | 60° | 75° | 90° |
| Fα | F0° | F15° | F30° | F45° | F60° | F75° | F90° |
| σ0 | 11.42F0° | 11.03F15° | 9.89F30° | 8.07F45° | 5.71F60° | 2.95F75° | 0 |
| fy | 0 | 2.95F15° | 5.71F30° | 8.07F45° | 9.89F60° | 11.03F75° | 11.42F90° |
Comparative example：
It (is in masonry test specimen by biaxial loadings to cut pressure combined state, i.e., apply masonry test specimen with conventional method
Vertical shear stress, and laterally applying direct stress, shearing strength of the masonry test specimen under different direct stress is obtained, and draws and just should
The relation curve of power and shear stress) direct stress and the relation curve of shearing strength are equally can obtain, test result is as shown in Figure 4.
But the utility model has the following advantages that by comparison：First, compared to conventional method the utility model using unidirectional
Loading substitutes biaxial loadings, simplifies load mode, improves experiment accuracy；Secondly, conventional method cannot change mortar mortar joint angle
Degree, can only be tested for a certain special angle, and the utility model is improved this and tumbler can change as needed
Become mortar mortar joint angle.Thus, the utility model has many advantages, such as that loading is at low cost, simple and convenient, highly practical.
Structure feature the foregoing is merely specific embodiment of the utility model, but the utility model is not limited to
This.
Claims (7)
1. a kind of masonry shear strength device for testing, which is characterized in that described device includes the first mold and the second mold, institute
The first mold is stated equipped with first surface and the first axial plane, the first surface is Cylinder Surface, on first axial plane
Equipped with the first placing groove of masonry；
Second mold be equipped with the second curved surface and the second axial plane, second curved surface be Cylinder Surface, second axis
Plane is equipped with the second placing groove of masonry.
2. masonry shear strength device for testing as described in claim 1, which is characterized in that the first mold includes first surface
Cylinder, the first surface cylinder are equipped with first surface, cohesive body, the cohesive body are filled in the first surface cylinder
The first axial plane is equipped with, the first placing groove of masonry is offered on first axial plane；
Second mold includes the second curved surface cylinder, and the second curved surface cylinder is equipped with the second curved surface, the second curved surface cylinder
Interior filled with cohesive body, the cohesive body is equipped with the second axial plane, which is equipped with the second placing groove of masonry.
3. masonry shear strength device for testing as claimed in claim 2, which is characterized in that the cohesive body material is coagulation
Soil, steel or wood material.
4. masonry shear strength device for testing as claimed in claim 2, which is characterized in that the first surface cylinder is half
Cylindrical tube, first placing groove of masonry are cuboid；The second curved surface cylinder be semi-cylindrical cylinder, the masonry
Second placing groove is cuboid.
5. masonry shear strength device for testing as claimed in claim 1 or 2, which is characterized in that first mold and
Two molds are assembled into cylinder, and the first axial plane is parallel with the second axial plane opposite and is equipped with gap therebetween, described
The first placing groove of masonry and the second placing groove of masonry composition masonry placing groove.
6. masonry shear strength device for testing as claimed in claim 1 or 2, which is characterized in that device further includes the first pad
Plate and the second backing plate, first backing plate are equipped with the first plane A and the first plane B, and it is flat that second backing plate is equipped with second
Face A and the second plane B, the first plane A and the second plane A is respectively used to installation the first mold and the second mold, and described the
One plane B and the second plane B is used for connecting test instrument.
7. masonry shear strength device for testing as claimed in claim 6, which is characterized in that the first plane A is equipped with
Groove, the second plane A are equipped with groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721507083.9U CN207423702U (en) | 2017-11-13 | 2017-11-13 | Masonry shear strength device for testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721507083.9U CN207423702U (en) | 2017-11-13 | 2017-11-13 | Masonry shear strength device for testing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207423702U true CN207423702U (en) | 2018-05-29 |
Family
ID=62305961
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721507083.9U Expired - Fee Related CN207423702U (en) | 2017-11-13 | 2017-11-13 | Masonry shear strength device for testing |
Country Status (1)
| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966373A (en) * | 2017-11-13 | 2018-04-27 | 西安建筑科技大学 | Masonry cuts pressure device and masonry cuts pressure combined strength bination test method |
-
2017
- 2017-11-13 CN CN201721507083.9U patent/CN207423702U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966373A (en) * | 2017-11-13 | 2018-04-27 | 西安建筑科技大学 | Masonry cuts pressure device and masonry cuts pressure combined strength bination test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190516 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 No. 13, Yanta Road, Shaanxi, Xi'an Patentee before: Xi'an Architectural Sci & Tech. Univ. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180529 Termination date: 20201113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |