CN104729988A - Device and method for testing bond-slip performance of new concrete and old concrete - Google Patents
Device and method for testing bond-slip performance of new concrete and old concrete Download PDFInfo
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- CN104729988A CN104729988A CN201410597297.4A CN201410597297A CN104729988A CN 104729988 A CN104729988 A CN 104729988A CN 201410597297 A CN201410597297 A CN 201410597297A CN 104729988 A CN104729988 A CN 104729988A
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Abstract
The invention provides a device and a method for testing the bond-slip performance of new concrete and old concrete. The device comprises a test piece fixing device, a loading device and a data acquisition unit, wherein the test piece fixing device comprises a bottom plate, a ground anchor bolt, a baffle and a locating bracket, and is used for fixing a new concrete and old concrete bonding test piece during a test and ensuring that the test piece does not move; the loading device comprises a loading end plate and a hydraulic jack and is used for applying thrust onto the new concrete in the new concrete and old concrete bonding test piece so as to enable the new concrete and the old concrete to move alternately and generate shear stress on the bonding surface; the data acquisition unit comprises a dial indicator, a force sensor, a data acquisition system and a central control computer. The push-out shear testing device is adopted, the instrument is simple in operation, a complete shear stress-slippage curve of the two ends of the bonding test piece can be obtained, and the bond-slip relationship of all points along the bonding length direction can be obtained, so that the device and the method are widely used in the study of new concrete and old concrete bonding performance.
Description
Technical field
The present invention relates to a kind of test unit and test method of testing bonding new concrete to old concrete slip property.
Background technology
naturally cohering between New-old concrete is the basis ensureing New-old concrete overall work, just because of this cohesive action, just makes novel concrete and old concrete energy co-operation, shared load.But novel concrete and cohering completely of old concrete only exist within certain stressed stage, after the shear stress on certain section of novel concrete back-up coat xsect exceedes the bond strength at interface, this segment limit face just there will be failure of peeling and shearing.Bear at interface in the process of shear stress, between novel concrete and old concrete, certain Relative sliding can be produced.This slippage is not free slippage, but is subject to cohering and the constraint of interface friction resistance of old concrete, is a kind of bond slip.Obviously, the bond slip relation of New-old concrete joint surface adopts basis that is theoretical or its its deformation performance of numerical Analysis, but the research of this respect is also relatively less at present.Therefore, by rational test unit, the Relative sliding between research novel concrete and old concrete, to the load-bearing capacity after load-bearing, damage-form, distortion and stress performance etc. carry out analyzing and inquiring into, thus to set up rational bond slip constitutive model be necessary.
Summary of the invention
The present invention improves the problems referred to above, namely the technical problem to be solved in the present invention is the bond slip relation of New-old concrete joint surface is adopt basis that is theoretical or its its deformation performance of numerical Analysis, and not yet have related experiment equipment to study the Relative sliding between novel concrete and old concrete at present, to the load-bearing capacity after load-bearing, damage-form, distortion is carried out analyzing and inquiring into stress performance etc.
Specific embodiment of the invention scheme is: a kind of test unit testing bonding new concrete to old concrete slip property, and to comprise bottom be old concrete top is the bonding new concrete to old concrete test specimen of newly-laid concrete, it is characterized in that: described test unit comprises:
One test piece fixing device for making bonding new concrete to old concrete test specimen old concrete be anchored on ground, be buckled on a few font locating supports of test specimen old concrete upper surface, and be arranged at the longitudinal baffle slided for preventing test specimen old concrete part to be subject to thrust on front side of test specimen, described locating support lower end and baffle plate lower end are fixed on ground by ground anchor bolt, and described height of baffle plate is not higher than test specimen old concrete Partial Height;
One for carrying out the charger loading thrust to newly-laid concrete part in bonding new concrete to old concrete test specimen, described charger comprises hydraulic jack, hydraulic jack applied thrust one end is connected with a loading end plate, for making New-old concrete crisscross motion to the novel concrete applied thrust in bonding new concrete to old concrete test specimen, the face of cohering produces shear stress;
For carrying out loading thrust data harvester to newly-laid concrete part in bonding new concrete to old concrete test specimen; Described data collector comprises and is arranged at test specimen novel concrete part loading end and free end arranges clock gauge, for responding to the force snesor of hydraulic jack.
Further, described test piece fixing device also comprises the base plate be placed in bottom test specimen, and described base plate is fixed on ground.
Further, described force snesor via line is connected with middle control computer.
Further, the rectangular shape of described bonding new concrete to old concrete test specimen, and bottom old concrete partial-length is longer than top newly-laid concrete.
The present invention second summary of the invention is: a kind of test method for testing bonding new concrete to old concrete slip property, comprise a kind of test unit testing bonding new concrete to old concrete slip property as described in claim 1 or 4, comprise the following steps: described bonding new concrete to old concrete slip property method of testing carries out based on strain and displacement measured by test unit the process that calculates and process, and its specific implementation process is as follows:
Step one: test specimen old concrete part is fixed by locating support and on front side of old concrete fixed dam, in novel concrete both sides near cohering face place, along loading direction alternative arrangement foil gauge, to measure along the concrete distortion in cohesive length direction; Respectively clock gauge is installed at loading end and free end, to measure the slippage of loading end and free end;
Step 2: first fix old concrete, adopts in the side of novel concrete hydraulic jack to be loaded on destruction, measures failing load P
u.Again with failing load P
u10% be increment to novel concrete load application P step by step, make New-old concrete crisscross motion, the face of cohering produce shear stress; Payload values during test and slip value input computer respectively by force snesor and displacement transducer, and carry out Real-time Collection by data acquisition system (DAS), to control test loading;
Step 3: the shear stress cohering face can be similar in the name of shear stress and represent, namely
, wherein
p maxfor ultimate load,
afor the area in the face of cohering; By loading end, free end erection clock gauge and loading end on load transducer, can accurately obtain test specimen shear stress-slippage (
) full curve, from load until destroy, by loading end slippage and the free end slippage of test specimen, obtain respectively shear stress-loading end slippage (
) curve and shear stress-free end slippage (
) curve;
Step 4: establish bond stress on interface
along cohesive length and loading direction transmission, be wherein novel concrete height h perpendicular to in-plane, by equilibrium of forces relation on micro-section of dX:
（1）
Namely
（2）
In formula:
bfor test specimen is wide,
hfor test specimen is high;
for modulus of elasticity of concrete,
for normal stress on xsect;
If the distance of 2 adjacent strain measuring points and free end is
with
, corresponding strain value is respectively
with
, then bond stress between these 2
calculated by following formula:
（3）
Step 5: the slippage that can be recorded test specimen free end by displacement transducer
s f , then on cohesive length, the slippage of any point can be expressed as:
（4）
In formula,
s f for free end slip value,
xfor the distance apart from free end.Owing to cannot record the strain of test specimen continuously, the integration therefore in formula can be similar to and replace by discontinuous strain testing value (discrete values) sum, that is:
（5）
Like this by bond stress
with slippage
sjust can obtain the bond slip relation along each point New-old concrete on cohesive length direction, namely
relation curve.
Compared with prior art, the present invention has following beneficial effect: what present system adopted is push type shearing test device, instrumentation is simple, can record and cohere the test specimen shear stress at two ends-slippage full curve, the bond slip relation along each point on cohesive length direction can be obtained again, therefore, can widely use in the research of bonding new concrete to old concrete performance.
Accompanying drawing explanation
Fig. 1 is test specimen structural representation of the present invention.
Fig. 2 is that test unit of the present invention uses structural representation.
Fig. 3 is that locating support of the present invention uses structural representation.
Fig. 4 is locating support stress section arrangement schematic diagram of the present invention.
Fig. 5 is that the present invention coheres face and micro-section of d
xforce analysis figure.
Fig. 6 is that the present invention coheres test member felted sliding curve.
Fig. 7 is that the present invention coheres test specimen
matched curve is compared with trial value.
Fig. 8 is the strain measurement result that the present invention coheres test specimen.
Fig. 9 is the bond stress distribution plan that the present invention coheres test specimen.
Figure 10 is the present invention local bond slip test findings example.
Figure 11 is that the new honest concrete of the present invention coheres test specimen diverse location place bond slip curve.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
As shown in Figure 1, for the old concrete in the present invention coheres test specimen 10(hereinafter referred to as test specimen), it be old concrete 110 and top is newly-laid concrete 120 two parts that test specimen 10 comprises bottom, general, the rectangular shape of bonding new concrete to old concrete test specimen, and bottom old concrete 110 partial-length is longer than top newly-laid concrete 120.
As shown in figures 2-3, be the schematic diagram of service test device of the present invention:
Comprise a test piece fixing device for making bonding new concrete to old concrete test specimen old concrete be anchored on ground, described stationary installation comprises a few font locating supports 210 being buckled on test specimen old concrete upper surface, and be arranged at the longitudinal baffle 220 slided for preventing test specimen old concrete part to be subject to thrust on front side of test specimen, described locating support 210 lower end and baffle plate lower end are fixed on ground by ground anchor bolt, described baffle plate 220 is not highly higher than test specimen old concrete part 110 height, above a few font locating support 210, top also can be provided with clamping screw 211 for locking test specimen,
One for carrying out the charger loading thrust to newly-laid concrete part in bonding new concrete to old concrete test specimen, described charger comprises hydraulic jack 310, hydraulic jack 310 applied thrust one end is connected with a loading end plate 311, for making New-old concrete crisscross motion to the novel concrete applied thrust in bonding new concrete to old concrete test specimen, the face of cohering produces shear stress;
For carrying out loading thrust data harvester to newly-laid concrete part in bonding new concrete to old concrete test specimen; Described data collector comprises and is arranged at test specimen novel concrete part loading end and free end arranges clock gauge (410,420) and the force snesor for responding to hydraulic jack 310, and force snesor via line is connected with middle control computer.Described test piece fixing device also comprises the base plate be placed in bottom test specimen, and described base plate is fixed on ground.
In embodiments of the present invention, described bonding new concrete to old concrete slip property method of testing carries out based on strain and displacement measured by test unit the process that calculates and process, and its specific implementation process is as follows:
(1) old concrete piece lengths gets 400mm, novel concrete length is desirable 200,250, these three kinds of sizes of 300mm.In novel concrete both sides near cohering face place, along loading direction alternative arrangement foil gauge 50(as shown in Figure 4), to measure along the concrete distortion in cohesive length direction; Clock gauge (410,420) is installed respectively, to measure the slippage of loading end and free end at loading end and free end.First fix old concrete, adopt in the side of novel concrete hydraulic jack to be loaded on destruction, measure failing load P
u.Again with failing load P
u10% be increment to novel concrete load application P step by step, make New-old concrete crisscross motion, the face of cohering produce shear stress.Payload values during test and slip value input computer respectively by force snesor and displacement transducer, and carry out Real-time Collection by data acquisition system (DAS), to control test loading.
(2) shear stress cohering face can be similar in the name of shear stress and represent, namely
, wherein
p maxfor ultimate load (N),
afor the area (mm in the face of cohering
2).By loading end, free end erection clock gauge and loading end on load transducer, can accurately obtain test specimen shear stress-slippage (
) full curve.From load until destroy, by loading end slippage and the free end slippage of test specimen, obtain respectively shear stress-loading end slippage (
) curve and shear stress-free end slippage (
) curve.
(3) bond stress on interface is established
transmit along cohesive length (loading direction), as shown in Figure 5 (be wherein novel concrete height h perpendicular to in-plane), by equilibrium of forces relation on micro-section of dX:
（1）
Namely
（2）
In formula:
bfor test specimen is wide,
b=100mm;
hfor test specimen is high,
h=100mm;
for modulus of elasticity of concrete,
for normal stress on xsect.
If the distance of 2 adjacent strain measuring points and free end is
with
, corresponding strain value is respectively
with
, then bond stress between these 2
calculated by following formula:
（3）
(4) slippage of test specimen free end can be recorded by displacement transducer
s f , then on cohesive length, the slippage of any point can be expressed as:
（4）
In formula,
s f for free end slip value,
xfor the distance apart from free end.Owing to cannot record the strain of test specimen continuously, the integration therefore in formula can be similar to and replace by discontinuous strain testing value (discrete values) sum, that is:
（5）
Like this by bond stress
with slippage
sjust can obtain the bond slip relation along each point New-old concrete on cohesive length direction, namely
relation curve.
Be below specific embodiments of the invention.
In example, old concrete length is 400mm, and strength grade is C30; Novel concrete length is 250mm strength grade is C30, C35, C40, C45.Old concrete surface is after dabbing, and recording roughness with sand replacement method is 2.0mm.In novel concrete both sides near cohering face place, along loading direction alternative arrangement foil gauge, to measure the bond slip performance of local.Respectively clock gauge is installed at loading end and free end, to measure the slippage of loading end and free end.Payload values during test and slip value input computer respectively by force snesor and displacement transducer, adopt IMP system to carry out Real-time Collection, to control test loading.In test constant speed hierarchical loading, load is differential is about 1kN, and adjacent two-stage load is about 5 seconds interval time.
The shear stress cohering face can be similar in the name of shear stress and represent, namely
, wherein
p maxfor ultimate load (N),
afor the area (mm in the face of cohering
2).By loading end, free end erection clock gauge and loading end on load transducer, can accurately obtain test specimen shear stress-slippage (
) full curve.From load until destroy, by loading end slippage and the free end slippage of test specimen, obtain respectively shear stress-loading end slippage (
) curve and shear stress-free end slippage (
) curve as shown in Figure 6
By carrying out the bond slip constitutive equation that regretional analysis can obtain loading end test specimen to test findings, that is:
Calculated curve and trial value compare sees Fig. 7.
Record the actual measurement strain curve figure (as Fig. 8 coheres the strain measurement result of test specimen) of the bonding new concrete to old concrete test specimen of different novel concrete intensity again, wherein X is apart from free end distance.
Can calculate the stress distribution on the face of cohering according to strain, computation model is shown in that bond stress on interface established by accompanying drawing 4.
transmitting along cohesive length (loading direction), is wherein that novel concrete is high perpendicular to in-plane
h, by micro-section of d
xupper equilibrium of forces relation:
（1）
Namely
（2）
In formula:
bfor test specimen is wide,
b=100mm;
hfor test specimen is high,
h=100mm;
for modulus of elasticity of concrete,
for normal stress on xsect.
If the distance of 2 adjacent strain measuring points and free end is
with
, corresponding strain value is respectively
with
, then bond stress between these 2
calculated by following formula:
（3）
The bond stress curve map of bonding new concrete to old concrete test specimen under various influence factor can be obtained like this, as shown in Figure 9.
The slippage of test specimen free end can be recorded by displacement transducer
s f , then on cohesive length, the slippage of any point can be expressed as:
（4）
In formula,
s f for free end slip value,
xfor the distance apart from free end.Owing to cannot record the strain of test specimen continuously, the integration therefore in formula can be similar to and replace by discontinuous strain testing value (discrete values) sum, that is:
（5）
Like this by bond stress
with slippage
sjust can obtain
relation.Figure 10 lists the bond slip test findings (as shown in Figure 10) of bonding new concrete to old concrete test specimen.
For the bonding new concrete to old concrete test specimen in this example, its local bond slip relation is substantially close, in figure
the rule of development of curve is with free end (X=25mm), loading end (X=225mm) and cohere Middle face (X=125mm) most representativeness.By the regretional analysis to test findings, the bond slip matched curve (as shown in figure 11) of these three measuring points can be obtained respectively.The curvilinear motion of free end is less, and slope is also little, and its rule of development is similar to quadratic function, can obtain formula (6) by regretional analysis
（6）
The related coefficient square value R of formula (6)
2=0.915.
At loading end place, bond stress and slippage all linearly increase and increase very fast, can represent, such as formula (7) according to its curve form of test figure with linear function
（7）
The related coefficient square value R of formula (7)
2=0.983.
The bond slip relation of center section can adopt piecewise function to represent, its fitting formula is such as formula (8)
（8）
The related coefficient square value R of formula (8)
2=0.891.
Be more than preferred embodiment of the present invention, all changes done according to technical solution of the present invention, when the function produced does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (5)
1. test a test unit for bonding new concrete to old concrete slip property, to comprise bottom be old concrete top is the bonding new concrete to old concrete test specimen of newly-laid concrete, it is characterized in that: described test unit comprises
One test piece fixing device for making bonding new concrete to old concrete test specimen old concrete be anchored on ground, be buckled on a few font locating supports of test specimen old concrete upper surface, and be arranged at the longitudinal baffle slided for preventing test specimen old concrete part to be subject to thrust on front side of test specimen, described locating support lower end and baffle plate lower end are fixed on ground by ground anchor bolt, and described height of baffle plate is not higher than test specimen old concrete Partial Height;
One for carrying out the charger loading thrust to newly-laid concrete part in bonding new concrete to old concrete test specimen, described charger comprises hydraulic jack, hydraulic jack applied thrust one end is connected with a loading end plate, for making New-old concrete crisscross motion to the novel concrete applied thrust in bonding new concrete to old concrete test specimen, the face of cohering produces shear stress;
For carrying out loading thrust data harvester to newly-laid concrete part in bonding new concrete to old concrete test specimen; Described data collector comprises and is arranged at test specimen novel concrete part loading end and free end arranges clock gauge, for responding to the force snesor of hydraulic jack.
2. a kind of test unit testing bonding new concrete to old concrete slip property according to claim 1, described test piece fixing device also comprises the base plate be placed in bottom test specimen, and described base plate is fixed on ground.
3. a kind of test unit testing bonding new concrete to old concrete slip property according to claim 1, described force snesor via line is connected with middle control computer.
4. a kind of test unit testing bonding new concrete to old concrete slip property according to claim 1, the rectangular shape of described bonding new concrete to old concrete test specimen, and bottom old concrete partial-length is longer than top newly-laid concrete.
5. one kind for testing the test method of bonding new concrete to old concrete slip property, comprise a kind of test unit testing bonding new concrete to old concrete slip property as claimed in claim 1, it is characterized in that, described bonding new concrete to old concrete slip property method of testing carries out based on strain and displacement measured by test unit the process that calculates and process, and its specific implementation process is as follows:
Step one: test specimen old concrete part is fixed by locating support and on front side of old concrete fixed dam, in novel concrete both sides near cohering face place, along loading direction alternative arrangement foil gauge, to measure along the concrete distortion in cohesive length direction; Respectively clock gauge is installed at loading end and free end, to measure the slippage of loading end and free end;
Step 2: first fix old concrete, adopts in the side of novel concrete hydraulic jack to be loaded on destruction, measures failing load P
u, then with failing load P
u10% be increment to novel concrete load application P step by step, make New-old concrete crisscross motion, the face of cohering produce shear stress; Payload values during test and slip value input computer respectively by force snesor and displacement transducer, and carry out Real-time Collection by data acquisition system (DAS), to control test loading;
Step 3: the shear stress cohering face can be similar in the name of shear stress and represent, namely
, wherein
p maxfor ultimate load,
afor the area in the face of cohering; By loading end, free end erection clock gauge and loading end on load transducer, can accurately obtain test specimen shear stress-slippage (
) full curve, from load until destroy, by loading end slippage and the free end slippage of test specimen, obtain respectively shear stress-loading end slippage (
) curve and shear stress-free end slippage (
) curve;
Step 4: establish bond stress on interface
along cohesive length and loading direction transmission, be wherein novel concrete height h perpendicular to in-plane, by equilibrium of forces relation on micro-section of dX:
（1）
Namely
（2）
In formula:
bfor test specimen is wide,
hfor test specimen is high;
for modulus of elasticity of concrete,
for normal stress on xsect;
If the distance of 2 adjacent strain measuring points and free end is
with
, corresponding strain value is respectively
with
, then bond stress between these 2
calculated by following formula:
（3）
Step 5: the slippage that can be recorded test specimen free end by displacement transducer
s f , then on cohesive length, the slippage of any point can be expressed as:
（4）
In formula,
s f for free end slip value,
xfor the distance apart from free end;
Owing to cannot record the strain of test specimen continuously, the integration therefore in formula can be similar to and replace by discontinuous strain testing value (discrete values) sum, that is:
（5）
Like this by bond stress
with slippage
sjust can obtain the bond slip relation along each point New-old concrete on cohesive length direction, namely
relation curve.
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|---|---|---|---|
| CN201410597297.4A CN104729988A (en) | 2014-10-30 | 2014-10-30 | Device and method for testing bond-slip performance of new concrete and old concrete |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105117567A (en) * | 2015-09-25 | 2015-12-02 | 福建江夏学院 | Method of constructing new and old concrete bond constraint shrinkage finite element model |
| CN106644761A (en) * | 2016-12-14 | 2017-05-10 | 大连理工大学 | Testing method for testing shearing constitutive relation of rock-concrete interface |
| CN106932254A (en) * | 2017-04-19 | 2017-07-07 | 吉林建筑大学 | Light-gauge steel section and foam concrete interface sliding method for testing performance |
| CN108760533A (en) * | 2018-05-08 | 2018-11-06 | 东南大学 | The experimental rig and test method of the shearing strength of UHPC-NC bonding interfaces |
| CN108871929A (en) * | 2018-07-05 | 2018-11-23 | 广西大学 | A kind of test method for testing steel-concrete bond slip performance |
| CN109579657A (en) * | 2019-01-10 | 2019-04-05 | 杭州市电力设计院有限公司 | A kind of slope displacement monitoring device and monitoring method |
| CN111398065A (en) * | 2020-04-24 | 2020-07-10 | 华侨大学 | Testing device for shearing resistance of superposed surface at high temperature |
| CN111504819A (en) * | 2020-04-26 | 2020-08-07 | 山东省交通科学研究院 | New and old concrete joint surface fatigue and shear resistance testing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980816A (en) * | 2012-12-06 | 2013-03-20 | 重庆交通大学 | Soil mass shearing rupture failure testing device and method |
| CN204214765U (en) * | 2014-10-30 | 2015-03-18 | 福建江夏学院 | A kind of test unit testing bonding new concrete to old concrete slip property |
-
2014
- 2014-10-30 CN CN201410597297.4A patent/CN104729988A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980816A (en) * | 2012-12-06 | 2013-03-20 | 重庆交通大学 | Soil mass shearing rupture failure testing device and method |
| CN204214765U (en) * | 2014-10-30 | 2015-03-18 | 福建江夏学院 | A kind of test unit testing bonding new concrete to old concrete slip property |
Non-Patent Citations (2)
| Title |
|---|
| 陈峰 等: "界面处理对自密实混凝土与老混凝土黏结滑移的影响", 《西北农林科技大学学报（自然科学版）》 * |
| 陈峰 等: "自密实混凝土与老混凝土的粘结-滑移性能", 《长安大学学报(自然科学版)》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105117567A (en) * | 2015-09-25 | 2015-12-02 | 福建江夏学院 | Method of constructing new and old concrete bond constraint shrinkage finite element model |
| CN106644761A (en) * | 2016-12-14 | 2017-05-10 | 大连理工大学 | Testing method for testing shearing constitutive relation of rock-concrete interface |
| CN106932254A (en) * | 2017-04-19 | 2017-07-07 | 吉林建筑大学 | Light-gauge steel section and foam concrete interface sliding method for testing performance |
| CN106932254B (en) * | 2017-04-19 | 2019-08-09 | 吉林建筑大学 | Light-gauge steel section and foam concrete interface sliding method for testing performance |
| CN108760533A (en) * | 2018-05-08 | 2018-11-06 | 东南大学 | The experimental rig and test method of the shearing strength of UHPC-NC bonding interfaces |
| CN108871929A (en) * | 2018-07-05 | 2018-11-23 | 广西大学 | A kind of test method for testing steel-concrete bond slip performance |
| CN108871929B (en) * | 2018-07-05 | 2021-01-12 | 广西大学 | Test method for testing bonding slippage performance of steel bar-concrete |
| CN109579657A (en) * | 2019-01-10 | 2019-04-05 | 杭州市电力设计院有限公司 | A kind of slope displacement monitoring device and monitoring method |
| CN111398065A (en) * | 2020-04-24 | 2020-07-10 | 华侨大学 | Testing device for shearing resistance of superposed surface at high temperature |
| CN111504819A (en) * | 2020-04-26 | 2020-08-07 | 山东省交通科学研究院 | New and old concrete joint surface fatigue and shear resistance testing method |
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Application publication date: 20150624 |