CN105675239B - A kind of super gravity field shaketalle test soil case - Google Patents
A kind of super gravity field shaketalle test soil case Download PDFInfo
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- CN105675239B CN105675239B CN201610032281.8A CN201610032281A CN105675239B CN 105675239 B CN105675239 B CN 105675239B CN 201610032281 A CN201610032281 A CN 201610032281A CN 105675239 B CN105675239 B CN 105675239B
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- bar
- sidepiece
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- gravity field
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of super gravity field shaketalle test soil case.Two blocks of side plates are symmetrically fixed in bottom plate arranged on left and right sides vertically, multilayer sidepiece bar is installed in the side plate of bottom plate arranged on left and right sides, multilayer sidepiece bar is arranged and forms sidepiece frame along the activity of bottom plate fore-and-aft direction up and down, outside is provided with multilayer end bar on the front and rear sides of bottom plate, multilayer end bar is mutually flexibly connected forms end frame up and down, connect connecting rod between the top of side plate, the bottom surface that the inner surface of end frame extends to bottom plate is equipped with sheet metal.The present invention can have light, simple structure by the dynamic response of the soil body on the modeling semo-infinite place of finite size, using the characteristics of convenient, test effect is good.
Description
Technical field
The present invention relates to a kind of native case of civil engineering experiment, more particularly, to a kind of super gravity field shaketalle test
Native case.
Background technology
In practical situations both, foundation soil body can be considered semi-infinite half-space place, but in super gravity field shaking table model
In, it can only artificially be provided with border equivalent to the soil body with the native case of finite size come the die-filling type soil body, the presence of native case.Cause
This, the native case in model test, which has to meet some requirements, could preferably simulate place prototype：End boundaries should be visual
For shear beam, being consistent property of deformation that should in test with the internal soil body reduces because of the phase interaction between end boundaries and the soil body
With the compressional wave excited；End boundaries should have identical roughness with the soil body, to provide vertical shearing on soil boundary
Stress, the generation of tilting moment is prevented, avoid causing redistribution of the inside soil body stress relative to prototype；Casing is in CENTRIFUGAL ACCELERATING
, to meet soil body earth pressure at rest state, the soil body caused by soil body lateral expansion should be avoided without lateral strain with vibration
Sedimentation and cubic deformation.
Vibration test soil case mainly has rigid box, cylindrical shape flexible box, laminar shear case at this stage.
Rigid box is the rigid container made of steel plate or lucite, because of its larger, reflection to vibration wave of rigidity
It is obvious that arriving at the energy of lateral boundaries to absorb, rigid box often pastes flexible material on chamber interior wall.However, in centrifuge
Under high-stress state in experiment, the property such as frictional force and rigidity of flexible material is difficult to determine；Flexible material is in vibration test
In will inevitably result from lateral deformation, the soil body will be unable to meet earth pressure at rest state.
Cylinder type flexible container is made up of a flexible material, and shape is similar cylindric, and its lower end is fixed on steel plate, upper end
Fixed by steel annulus, flexible material outer wrapping fiber band or steel wire provide radial rigidity.However, flexible box can not be to the border of container
Rigidity directly controls, and the soil body of outer wrapping fiber interband easily outwards expands when vibrating, and causes strain to concentrate, causes releasing for confining pressure
Put；Flexible box inner surface is smooth, can not provide shear stress vertical on border；Larger depth-width ratio regular meeting causes experimental condition
Closer to three-dimensional boundaries.
If laminar shear case is generally dried layer rectangle plane steel frame and overlaps and be made in interlayer placement bearing from down to up,
Relative it can be slided between rectangle plane steel frame to simulate native detrusion.Laminar shear case compares both the above soil case, to soil
Detrusion almost do not constrain, reduce reflection of the border to ripple.Again because employing rigid frame, have to the soil body preferably
Lateral restriction, limit the lateral deformation of the soil body.But the laminar shear case used is studied at this stage and still suffers from following deficiency
Place：(1) in interlayer there is the relative changing of the relative positions in laminar shear case, can not provide continuous displacement on soil boundary, will cause soil body side
A LOCAL STRESS-STRAIN in boundary is concentrated；(2) framework for shearing case is directly superimposed with each other by roller bearing between layers, bottom interlayer
If sliding and alignment going wrong, the motion of upper box rack-layer will be also directly affected；(3) cabinet wall is smooth, can not provide
Vertical shear stress on border, it will inevitably cause redistribution of the inside soil body stress relative to prototype.
The content of the invention
In order to overcome the shortcomings of in background technology, it is an object of the invention to provide a kind of super gravity field shaketalle test soil
The relative changing of the relative positions is not present borderline in case, casing between layers, and boundary displacement is continuous, and the slip and alignment of bottom interlayer are asked
Topic will not directly affect the motion of upper layer, and cabinet wall is rough to provide vertical shear stress, above-mentioned existing to overcome
The deficiency of native case.
The technical solution adopted by the present invention is：
The present invention includes bottom plate, side plate, sidepiece frame and end frame and formed, and two blocks of side plates are symmetrically fixed on bottom respectively vertically
In plate arranged on left and right sides, multilayer sidepiece bar is installed in the side plate of bottom plate arranged on left and right sides, multilayer sidepiece bar is arranged and the bottom of along up and down
The activity of plate fore-and-aft direction forms sidepiece frame, and outside is provided with multilayer end bar on the front and rear sides of bottom plate, above and below the bar of multilayer end
Mutually it is flexibly connected and forms end frame, connecting rod is connected between the top of side plate, the inner surface of end frame extends to the bottom surface of bottom plate
It is equipped with sheet metal.
The symmetrical medial surface of two blocks of side plates is equipped with along the parallel multiple tracks bar-shaped trough of bottom plate fore-and-aft direction, each bar
Sidepiece bar is installed in shape groove, in the middle part of sidepiece bar in it is hollow, in the middle part of sidepiece bar in be provided with strip channel, it is upper and lower in the middle part of sidepiece bar
Connected between sidepiece and bar-shaped trough by guide rail roll structure so that sidepiece bar moving along bottom plate fore-and-aft direction in bar-shaped trough.
Hollow in the middle part of described end bar to be provided with strip channel, strip channel is built with a metallic rod, metallic rod both ends
It is fixedly attached to after through strip channel on sidepiece bar.
Described end bar upper top is provided with strip groove, and bottom face is provided with coordinates the convex of insertion with strip groove
Bar, it is embedded into by either end bar raised line in adjacent lower end bar strip groove, each end bar is sequentially connected, bottom
End bar raised line be embedded into the strip groove being provided with bottom plate.
Described sidepiece bar is identical with the number of plies of end bar, and every layer of sidepiece bar and end bar is highly identical.
Described sheet metal can have mercy on song, incompressible and extend.
The medial surface of described sheet metal is mat surface, and its roughness is identical with the roughness of tested inside soil body, metal
Lubricating oil is coated between piece and native case end frame.
Described side plate outer surface is provided with multiple rectangular recess for being used to reduce quality.
The invention has the advantages that：
(1) sidepiece bar and end bar are hollow-core construction, so as to alleviate the quality of whole chest, can minimize native case matter
Amount is to lateral inertia force caused by the soil body.
(2) native case has enough rigidity, and top is provided with connecting rod, and casing is not susceptible to lateral drum deformation so that
Model clay body disclosure satisfy that the condition of zero lateral deformation.
(3) native case end can Free Transform, to soil detrusion almost do not constrain, one with soil deformation can be kept
Cause property, reduces the generation of compressional wave.
(4) end bar can rotate relatively freely between layers, it is possible to provide boundary displacement continuously deforms, and reduces framework
The soil disturbance of interlayer.
(5) every layer of sidepiece bar can independently of each other in the groove of side plate slidably, it is therefore prevented that the slip of bottom interlayer
The influence moved with alignment issues to upper box rack-layer.
(6) sheet metal rough inner surface, it is possible to provide vertical shear stress on border, avoid causing inside soil body stress phase
For the redistribution of prototype.
Brief description of the drawings
Fig. 1 is normal axomometric drawing.
Fig. 2 is Facad structure half sectional view of the present invention.
Fig. 3 is A-A faces sectional view.
Fig. 4 is end and sidepiece bar connection diagram.
Fig. 5 is end bar interlayer connection diagram.
Fig. 6 is present invention experiment schematic diagram.
Fig. 7 is laminar shear case and the experiment effect comparison diagram of the present invention.
In figure：1st, bottom plate, 2, side plate, 3, sheet metal, 4, sidepiece bar, 5, end bar, 6, metallic rod, 7, guide rail ball knot
Structure, 8, connecting rod.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As shown in Figure 1, Figure 2, Figure 3 shows, the present invention includes bottom plate 1, side plate 2, sidepiece frame and end frame composition, sidepiece frame and end
Portion's frame can use aluminum alloy materials, and two blocks of side plates 2 respectively symmetrically are fixed in the arranged on left and right sides of bottom plate 1 vertically, and bottom plate 1 is left and right
Four layers of sidepiece bar 4 are installed, four layers of sidepiece bar are arranged about 4 and form side along the activity of the fore-and-aft direction of bottom plate 1 in the side plate 2 of both sides
Portion's frame, outside is provided with four layers of end bar 5 on the front and rear sides of bottom plate 1, and four layers of end bar are mutually flexibly connected about 5 and form end
Frame, every layer of sidepiece bar 4 and end bar 5 is highly identical, is connected to prevent centrifuge test middle case between the top of side plate 2
Lateral deformation connecting rod 8, the bottom surface that the inner surface of end frame extends to bottom plate 1 is equipped with sheet metal 3.
As shown in Figure 1, Figure 3, there are multiple rectangular recess the rigid outer surface of side plate 2, to reduce the quality of native case, two pieces of sides
The symmetrical medial surface of plate 2 is equipped with along four parallel bar-shaped troughs of the fore-and-aft direction of bottom plate 1, and sidepiece is provided with each bar-shaped trough
Bar 4, it is hollow in the middle part of sidepiece bar 4, it is provided with strip channel in the middle part of sidepiece bar 4, sidepiece up and down and bar-shaped trough in the middle part of sidepiece bar 4
Between connected by guide rail roll structure 7；Guide rail roll structure 7 includes being separately mounted to the middle part of sliding channel of sidepiece bar 4 and bar-shaped trough
The ball installed between inwall upper rail and guide rail, ball are embedded in be formed in guide rail and are slidably connected, and every layer of sidepiece bar 4 can be only
On the spot moved in bar-shaped trough along the fore-and-aft direction of bottom plate 1.
As shown in Figure 3 and Figure 5, the upper top of end bar 5 is provided with strip groove, and bottom face is provided with to be coordinated with strip groove
Embedded raised line, it is embedded into by the raised line of either end bar 5 in the adjacent strip groove of lower end bar 5, each end bar 5 is successively
Connection, to realize the relative rotation of end bar interlayer.It is recessed that the nethermost raised line of end bar 5 is embedded into the bar shaped being provided with bottom plate 1
In groove, the uppermost upper top of end bar 5 is plane, is not provided with strip groove.
As shown in figure 4, the middle part of end bar 5 is hollow to be provided with strip channel, strip channel is built with a metallic rod 6, end
Metallic rod 6 in bar, which passes through, to be passed part after strip channel and can be inserted into sidepiece bar 4 with the aperture of diameter, to allow end bar 5
Relative to freely rotating for sidepiece bar 4.
As shown in Fig. 1, Fig. 3 and Fig. 5, native case terminal interior surface has sheet metal 3, and sheet metal 3 extends and is fixed on native case
On bottom plate 1, coating lubricating oil is tested with allowing the relative displacement of end frame and sheet metal 3 between sheet metal 3 and native case end frame
Before, soil particle used in the inner surface adherence test of sheet metal 3, make native case terminal interior surface coarse.
As shown in fig. 6, the drying silica sand of 50cm height is filled in laminar shear case and the present invention respectively, in soil sample center
Portion and with installing accelerometer A1 and A2 on the outside of height casing respectively.Two native casees are lifted on shake table respectively, make native case by
Continue 10s to sine wave oscillations, laminar shear case and acceleration response spectrum in the present invention are obtained after data processing respectively such as Fig. 7.
It can be seen from (a) and (b) in Fig. 7 laminar shear case due to border relative storey displacement it is discontinuous, and can not carry
For reasons such as shear stresses vertical on border, (the T under normal working frequency<1s), there is more for acceleration inside and outside casing
Obvious difference；And the acceleration and internal acceleration response spectrum on the outside of casing of the present invention are almost consistent completely, reflect
The boundary effect of the invention for caused by the soil body is minimum, can preferably simulate place prototype.
As can be seen here, the present invention can have light, structure by the soil body on the modeling semo-infinite place of finite size
Make simply, using conveniently, test effect well waits prominent significant technique effect.Above-mentioned embodiment is used for illustrating
The present invention, rather than limit the invention, in the protection domain of spirit and claims of the present invention, the present invention is made
Any modifications and changes gone out, both fall within protection scope of the present invention.
Claims (7)
- A kind of 1. super gravity field shaketalle test soil case, it is characterised in that：Including bottom plate (1), side plate (2), sidepiece frame and end Frame is formed, and two pieces of side plates (2) respectively symmetrically are fixed in bottom plate (1) arranged on left and right sides vertically, the side of bottom plate (1) arranged on left and right sides Multilayer sidepiece bar (4) is installed, multilayer sidepiece bar (4) is arranged and forms side along the activity of bottom plate (1) fore-and-aft direction up and down in plate (2) Portion's frame, outside is provided with multilayer end bar (5) on the front and rear sides of bottom plate (1), and multilayer end bar (5) is mutually flexibly connected shape up and down Into end frame, connecting rod (8) is connected between the top of side plate (2), the bottom surface that the inner surface of end frame extends to bottom plate (1) is all provided with There is sheet metal (3).
- A kind of 2. super gravity field shaketalle test soil case according to claim 1, it is characterised in that：Two blocks of side plates (2) symmetrical medial surface is equipped with along the parallel multiple tracks bar-shaped trough of bottom plate (1) fore-and-aft direction, and side is provided with each bar-shaped trough Portion's bar (4), in the middle part of sidepiece bar (4) in it is hollow, in the middle part of sidepiece bar (4) in be provided with strip channel, the upper and lower sides in the middle part of sidepiece bar (4) Pass through guide rail roll structure (7) between portion and bar-shaped trough to connect so that sidepiece bar (4) is in bar-shaped trough along bottom plate (1) fore-and-aft direction Movement；Hollow in the middle part of described end bar (5) to be provided with strip channel, strip channel is built with a metallic rod (6), metallic rod (6) both ends are fixedly attached on sidepiece bar (4) after passing through strip channel.
- A kind of 3. super gravity field shaketalle test soil case according to claim 1, it is characterised in that：Described end bar (5) upper top is provided with strip groove, and bottom face is provided with coordinates embedded raised line with strip groove, passes through either end bar (5) raised line is embedded into adjacent lower end bar (5) strip groove, and each end bar (5) is sequentially connected, nethermost end bar (5) raised line is embedded into the strip groove being provided with bottom plate (1).
- A kind of 4. super gravity field shaketalle test soil case according to claim 1, it is characterised in that：Described sidepiece bar (4) identical with the number of plies of end bar (5), every layer of sidepiece bar (4) and end bar (5) is highly identical.
- A kind of 5. super gravity field shaketalle test soil case according to claim 1, it is characterised in that：Described sheet metal (3) can flexing, it is incompressible and extend.
- A kind of 6. super gravity field shaketalle test soil case according to claim 1, it is characterised in that：Described sheet metal (3) medial surface is mat surface, and its roughness is identical with the roughness for testing inside soil body, sheet metal (3) and native case end frame Between be coated with lubricating oil.
- A kind of 7. super gravity field shaketalle test soil case according to claim 1, it is characterised in that：Described side plate (2) Outer surface is provided with multiple rectangular recess for being used to reduce quality.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610032281.8A CN105675239B (en) | 2016-01-18 | 2016-01-18 | A kind of super gravity field shaketalle test soil case |
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| CN201610032281.8A CN105675239B (en) | 2016-01-18 | 2016-01-18 | A kind of super gravity field shaketalle test soil case |
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| CN105675239B true CN105675239B (en) | 2017-11-24 |
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| CN106300055B (en) * | 2016-08-31 | 2018-04-20 | 国网山东省电力公司蓬莱市供电公司 | A kind of switchgear |
| CN111442890A (en) * | 2020-04-30 | 2020-07-24 | 天津大学 | Vibrating table soil testing box |
| CN112690829B (en) * | 2020-12-15 | 2023-04-07 | 重庆医科大学附属第二医院 | Collector for accurately collecting urine samples |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05281081A (en) * | 1992-04-01 | 1993-10-29 | Fujita Corp | Sheared soil tube for model vibration experiment |
| JP4054492B2 (en) * | 1999-08-31 | 2008-02-27 | 西松建設株式会社 | Shear soil tank for centrifugal vibration model experiment |
| JP3314072B2 (en) * | 2000-04-17 | 2002-08-12 | 鹿島建設株式会社 | Shear tank and shear deformation reproducing device |
| JP2003042891A (en) * | 2001-08-03 | 2003-02-13 | Kiso Jiban Consultants Kk | Soil pressure balanced high-facility shear soil tank |
| CN201173884Y (en) * | 2008-01-17 | 2008-12-31 | 同济大学 | Large-sized laminar shearing mold case device for underground structure jigging platform test |
| CN201965008U (en) * | 2011-03-07 | 2011-09-07 | 北京工业大学 | Superposed two-way shearing type model box device used for test of vibration table |
| CN104406755B (en) * | 2014-12-11 | 2017-11-14 | 河南工业大学 | A kind of stratiform oscillatory shear soil case experimental rig |
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