CN108360577B - Simulate the torque loading device and method of stake top linearly or nonlinearly deflection constraint - Google Patents
Simulate the torque loading device and method of stake top linearly or nonlinearly deflection constraint Download PDFInfo
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- CN108360577B CN108360577B CN201810119082.XA CN201810119082A CN108360577B CN 108360577 B CN108360577 B CN 108360577B CN 201810119082 A CN201810119082 A CN 201810119082A CN 108360577 B CN108360577 B CN 108360577B
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- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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- E02D33/00—Testing foundations or foundation structures
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Abstract
The present invention provides the torque loading device and method of a kind of simulation stake top linearly or nonlinearly deflection constraint, belongs to the technical field of pile foundation engineering, which includes column, torque loading module and stake top torsional restraint module；The quantity of column is four, is arranged centered on Model Pile in rectangle, and bottom end is fixed on the support surface；Torque loading module includes for being set in the separator box of model stake top, using the center line of Model Pile two loading beams that arranged symmetrically and first end is fixedly connected with separator box as symmetry axis and MTS actuator；Stake top torsional restraint module includes gear, mounting box, Hookean spring-slide block assembly, nonlinear spring-slide block assembly and ratch；Ratch is engaged by the sawtooth portion on the body of rod with gear, and both ends protrude into the hemisphere in mounting box and being provided with for squeezing inclined plane slide block or curved surface sliding block and smash head.It is connected the arrangement achieves the constraint of stake top torsional flexibility and the constraint of two class torsion stiffness of stake top linear and nonlinear can be simulated.
Description
Technical field
The present invention relates to the technical field of pile foundation engineering, more particularly to a kind of simulation stake top, linearly or nonlinearly rigidity is about
The torque loading device and method of beam.
Background technique
Pile foundation is often used as the preferred type of foundation of marine large scale structure, such as bridge spanning the sea, offshore oil platform, over strait
Power transmission tower, anemometer tower etc..Under earthquake, ship collision, the stormy waves the effects of, foundation pile is subjected to the effect of horizontal eccentric load, stake
Top generates torsion.Marine jacket steel pipe pile foundation, stake top anchors insufficient prefabricated tubular pile, by the constraint of superstructure or cushion cap
Ideal stake top build-in situation will be weaker than, pile crown is easily led under horizontal Under Eccentric Loading and is rotated together with structure or in cushion cap
It inside rotates, pile crown is constrained between the clamped flexible connection between pile crown freedom of pile crown at this time, belongs to varied rigid link
The scope of node.When stake and firm cushion cap anchoring, foundation pile can also be rotated with it when cushion cap is turned round.As it can be seen that pile crown constraint is shadow
One of an important factor for ringing single pile horizontal load-bearing characteristic.When load is larger, pile crown coupling part will be surrendered, at this time stake top
Torsion stiffness is in nonlinear change with windup-degree, shows as the increase with torsion angle, stake top torque increasing degree gradually subtracts
It is small.If recognizing deficiency to stake top constraint condition in design, the displacement of structure real standard may be made beyond design value.
Chinese invention patent (CN201210497143.9) discloses a kind of horizontal loading test stake top restraint device and side
Method, when realizing stake top horizontal addload, horizontal displacement can only occur for stake top, without rotation or the displacement in other directions.In
State's utility model patent (CN201520393007.4) discloses a kind of stake position restraint device for pile foundation model test, including one
The cabinet of a uncovered, is respectively set along the X, Y, Z axis direction of three-dimensional space that there are two X-axis to adjust beam (two phases of setting on cabinet
Pair arc restraining plate), four Y-axis adjust beams and four Z axis adjust beams, be bolted, and adjust beam by adjusting Z axis
On bolt location make two X-axis adjust beams to draw close to pile body, so that restraining plate be made gradually to encase pile body, realize fixed model
The position of stake.But generally speaking, has torsion loading device and be directed to stake top free state mostly, rarely have stake under stake top flexible constraint
Experimental Study on Torsion Test, and still lack loading device related to this.
Summary of the invention
The purpose of the present invention is to provide a kind of torque loading device of simulation stake top linearly or nonlinearly deflection constraint, with
Realize that the constraint of stake top torsional flexibility connects and simulates the constraint of two class torsion stiffness of stake top linear and nonlinear, and using the device as base
Plinth provides a kind of method of simulation stake top linearly or nonlinearly deflection constraint.
The present invention provides a kind of torque loading device of simulation stake top linearly or nonlinearly deflection constraint, including column, turns round
Square loading module and stake top torsional restraint module；The quantity of column is four, is arranged centered on Model Pile in rectangle, and bottom end is solid
Determine on the support surface；Torque loading module includes for being set in the separator box of model stake top, being with the center line of Model Pile
Two loading beams and MTS actuator that symmetry axis is symmetrical arranged and first end is fixedly connected with separator box；Loading beam and MTS make
Dynamic device is in the same plane parallel with supporting surface；MTS actuator is connect perpendicular to loading beam, loading head with loading beam, and
It is symmetrical arranged by symmetry axis of the center line of Model Pile；Stake top torsional restraint module includes gear, mounting box, Hookean spring-cunning
Block assembly, nonlinear spring-slide block assembly and ratch；Gear centre portion is fixedly connected with the top surface of separator box；The number of mounting box
Amount is four, is fixed on the top of column；Hookean spring-slide block assembly and nonlinear spring-slide block assembly quantity are two
It is a, it is arranged in mounting box and is arranged diagonal；Hookean spring-slide block assembly includes that the inclined-plane being slidably arranged in mounting box is slided
Block and the spring for connecting inclined plane slide block and mounting box inner wall；The quantity of inclined plane slide block and spring is two, and inclined plane slide block
Inclined-plane be oppositely arranged；Nonlinear spring-slide block assembly includes that the curved surface sliding block being slidably arranged in mounting box and connection are bent
The spring of face sliding block and mounting box inner wall；The quantity of curved surface sliding block and spring is two, and the curved surface of curved surface sliding block is set relatively
It sets；Inclined plane slide block and curved surface sliding block are in the same slip plane parallel with supporting surface；Ratch by sawtooth portion on the body of rod with
Gear engagement, both ends protrude into the hemisphere in mounting box and being provided with for squeezing inclined plane slide block or curved surface sliding block and smash head.
Further, stake top torsional restraint module further includes connection frame and sleeve；Connection frame includes first be oppositely arranged
Connecting rod and second connecting rod and the third connecting rod for connecting first connecting rod midpoint and second connecting rod midpoint；Sleeve is arranged in second connecting rod
Both ends；First connecting rod is for being connected with nonlinear spring-slide block assembly mounting box and being provided with Hookean spring-sliding block group
The mounting box of part；The smooth body of rod on ratch positioned at sawtooth portion two sides passes through sleeve, and can be along the axial movement of sleeve.
Further, the sawtooth portion of ratch is flat, and the smooth body of rod positioned at sawtooth portion two sides is cylindric；Sleeve
Section is square, and the ball that cooperation is rolled with the smooth body of rod is provided on four internal angles.
Further, the side that inclined plane slide block and curved surface sliding block are contacted with mounting box inner wall is provided with idler wheel；Mounting box
The sliding slot with idler wheel cooperation is provided in upper inside walls and downside inner wall.
Further, gear be blade type hollow out gear, including outer edge be sawtooth ring part, be arranged in ring part
The blade of the central part of the heart and the inward flange of connection ring part and central part.
Further, the inner peripheral surface of separator box and the outer peripheral surface of model stake top agree with, including two separable cabinets；
Two cabinets are connected with the stake top that the center line of Model Pile is that symmetrical axial symmetry is set in Model Pile by split bolt；Load
Beam is I-steel, welds with separator box, is bolted with the loading head of MTS actuator；Gear is bolted with separator box.
Further, multiple ribbed stiffeners are welded between two edges of a wing of I-steel.
Further, the torque loading device of simulation stake top linearly or nonlinearly deflection constraint, further includes for fixing MTS
The counter force wall of actuator end.
Further, the torque loading device of simulation stake top linearly or nonlinearly deflection constraint further includes for stent
The model casing of type stake has filled model clay in model casing.
The present invention also provides a kind of methods of simulation stake top linearly or nonlinearly deflection constraint, and the method is based on above-mentioned
Simulate stake top linearly or nonlinearly deflection constraint torque loading device implement, include the following steps:
S1. MTS actuator is opened, a pair of equal in magnitude, contrary couple of force is applied to loading beam, and pass through separation
Torque is acted on model stake top by case, and band moving gear rotates together；
S2. the rotation displacement of model stake top is amplified by gear, and ratch is driven to move, the hemisphere at ratch both ends
Body smashes head and squeezes the Hookean spring-slide block assembly or nonlinear spring-slide block assembly being diagonally arranged, inclined plane slide block or curved surface sliding block
Compressed spring realizes the constraint of stake top linear rigidity or non-linear rigidity constraint.
Compared with prior art, present invention has an advantage that
1. the constraint connection of stake top torsional flexibility is realized, it is insufficient pre- to carry out marine jacket steel-pipe pile and pile crown anchoring
The torque characteristic of stake processed provides experimental condition；
2. converting ratch horizontal movement for stake top, and amplified by gear, utilizes Hookean spring-sliding block group
Part and nonlinear spring-slide block assembly dexterously realize the application of stake top inverted constraint condition；
3. Hookean spring-slide block assembly and nonlinear spring-slide block assembly can realize that two class of stake top linear and nonlinear is turned round
Turn deflection constraint, improves the applicability of experimental provision.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, in which:
Fig. 1 is the torque loading device for the simulation stake top linearly or nonlinearly deflection constraint that the embodiment of the present invention 1 provides
Main view；
Fig. 2 is the side view of torque loading device shown in Fig. 1；
Fig. 3 is the top view of torque loading device shown in Fig. 1；
Fig. 4 be in torque loading device shown in Fig. 1 separator box and loading beam in the connection main view of stake top；
Fig. 5 is connection side view of the separator box and loading beam shown in Fig. 4 in stake top；
Fig. 6 is connection top view of the separator box and loading beam shown in Fig. 4 in stake top；
Fig. 7 is Hookean spring-slide block assembly or nonlinear spring-slide block assembly master in torque loading device shown in Fig. 1
View；
Fig. 8 is Hookean spring-slide block assembly top view shown in Fig. 7；
Fig. 9 is nonlinear spring-slide block assembly top view shown in Fig. 7；
Figure 10 is the scheme of installation of ratch and sleeve in torque loading device shown in Fig. 1；
Figure 11 is the force analysis figure of inclined plane slide block in embodiment 2；
Figure 12 is that curvilinear function is in embodiment 2y=x 2Curved surface sliding block force analysis figure；
Figure 13 is that curvilinear function is in embodiment 2x 2 +y 2 =a 2 Curved surface sliding block force analysis figure.
Label: 100- column；201- separator box；202- loading beam；203-MTS actuator；204- ribbed stiffener；301- tooth
Wheel；302- mounting box；303- ratch；304- inclined plane slide block；305- spring；306- curved surface sliding block；307- hemisphere smashes head；308-
Connection frame；309- sleeve；310- ball；311- idler wheel；400- counter force wall；500- model casing；600- Model Pile.
Specific embodiment
Embodiment 1
The present embodiment provides a kind of torque loading devices of simulation stake top linearly or nonlinearly deflection constraint, such as Fig. 1 to Fig. 9
It is shown, including column 100, torque loading module and stake top torsional restraint module；The quantity of column 100 is four, with Model Pile
It is arranged centered on 600 in rectangle, bottom end fixation is such as bolted on the support surface；Torque loading module includes for being set in mould
The separator box 201 of 600 stake top of type stake is symmetrical arranged using the center line of Model Pile 600 as symmetry axis and first end and separator box 201
Two loading beams 202 and MTS actuator 203 being fixedly connected；Loading beam 202 and MTS actuator 203 are in flat with supporting surface
In capable same plane；MTS actuator 203 is connect perpendicular to loading beam 202, loading head with loading beam 202, and with Model Pile
600 center line is symmetrical arranged for symmetry axis；Stake top torsional restraint module includes gear 301, mounting box 302, Hookean spring-cunning
Block assembly, nonlinear spring-slide block assembly and ratch 303；301 central part of gear is fixedly connected with the top surface of separator box 201；Peace
The quantity of mounted box 302 is four, is fixed on the top of column 100；Hookean spring-slide block assembly and nonlinear spring-sliding block group
The quantity of part is two, is arranged in mounting box 302 and is arranged diagonal；Hookean spring-slide block assembly includes sliding setting
The spring 305 of inclined plane slide block 304 and connection inclined plane slide block 304 and 302 inner wall of mounting box in mounting box 302；Inclined-plane is sliding
The quantity of block 304 and spring 305 is two, and the inclined-plane of inclined plane slide block 304 is oppositely arranged；Nonlinear spring-slide block assembly
Including the curved surface sliding block 306 being slidably arranged in mounting box 302 and the bullet for connecting curved surface sliding block 306 and 302 inner wall of mounting box
Spring 305；The quantity of curved surface sliding block 306 and spring 305 is two, and the curved surface of curved surface sliding block 306 is oppositely arranged；Inclined plane slide block
304 and curved surface sliding block 306 be in the same slip plane parallel with supporting surface；Ratch 303 passes through sawtooth portion on the body of rod and tooth
301 engagement of wheel, both ends are protruded into mounting box 302 and are provided with the hemisphere for squeezing inclined plane slide block 304 or curved surface sliding block 306
Smash first 307.
Further, column 100 is rectangle column.
In order to reduce the vibration that ratch 303 generates during exercise, keep the movement of ratch 303 more steady, as shown in Fig. 2,
Stake top torsional restraint module further includes connection frame 308 and sleeve 309；Connection frame 308 includes the first connecting rod that is oppositely arranged and the
Two connecting rods and the third connecting rod for connecting first connecting rod midpoint and second connecting rod midpoint；Sleeve 309 is arranged at second connecting rod both ends；
First connecting rod is for being connected with nonlinear spring-slide block assembly mounting box 302 and being provided with Hookean spring-slide block assembly
Mounting box 302；The smooth body of rod on ratch 303 positioned at sawtooth portion two sides passes through sleeve 309, and can be along the axis of sleeve 309
To movement.The hanging setting that connection frame 308 is realized by mounting box 302 avoids and is connected by additional support construction support
Frame 308 is connect, the structure of whole device is simplified.
Further, the sawtooth portion of ratch 303 is flat, and the smooth body of rod positioned at sawtooth portion two sides is cylindric.Set
Cylinder 309 can be set to cylindrical shape, be socketed with the smooth body of rod, in order to reduce the frictional force between the smooth body of rod and sleeve 309, this reality
It applies example and ball 310 is set between the smooth body of rod and sleeve 309, sliding friction is become into rolling friction, it is preferable that such as Figure 10 institute
Show, the section of sleeve 309 is square, and the ball 310 that cooperation is rolled with the smooth body of rod is provided on four internal angles, in this way
Design structure it is more simple.If being circle by the section of sleeve 309, it need to be arranged on the barrel of sleeve 309 and accommodate ball
310 groove.
Further, as shown in Figure 7 to 9, inclined plane slide block 304 and curved surface sliding block 306 are contacted with 302 inner wall of mounting box
Side is provided with idler wheel 311, to reduce the frictional resistance of inclined plane slide block 304 and curved surface sliding block 306, improves the precision of test；Peace
The sliding slot cooperated with idler wheel 311 is provided in the upper inside walls and downside inner wall of mounted box 302, to guarantee inclined plane slide block 304 and song
Face sliding block 306 can be slided along sliding slot, avoid generating offset, outside inner wall is not provided with sliding on (side far from Model Pile 600)
Slot, to provide support to inclined plane slide block 304 and curved surface sliding block 306.
Further, gear 301 is blade type hollow out gear to reduce the self weight of gear 301, convenient for rotation；Including outer edge
For the ring part, the inward flange of central part and connection ring part that ring part center is arranged in and the blade of central part of sawtooth.
Further, the inner peripheral surface of separator box 201 and the outer peripheral surface of 600 stake top of Model Pile agree with, including two separable
Cabinet；Two cabinets are with the stake top that the center line of Model Pile 600 is that symmetrical axial symmetry is set in Model Pile 600, by drawing
It is bolted；Loading beam 202 is I-steel, welds with separator box 201, is bolted with the loading head of MTS actuator 203；Tooth
Wheel 301 is bolted with separator box 201.
Further, as shown in fig. 6, multiple ribbed stiffeners 204 are welded between two edges of a wing of I-steel, to guarantee I-shaped
The rigidity of steel.
Further, the torque loading device of simulation stake top linearly or nonlinearly deflection constraint, further includes for fixing MTS
The counter force wall 400 of 203 end of actuator.
Further, the torque loading device of simulation stake top linearly or nonlinearly deflection constraint further includes for stent
The model casing 500 of type stake 600 has filled model clay in model casing 500.
Embodiment 2
The present embodiment provides a kind of method of simulation stake top linearly or nonlinearly deflection constraint, the method is based on embodiment
Simulation stake top described in 1 linearly or nonlinearly deflection constraint torque loading device implement, include the following steps:
S1. MTS actuator 203 is opened, a pair of equal in magnitude, contrary couple of force is applied to loading beam 202, and lead to
It crosses separator box 201 and torque is acted on into 600 stake top of Model Pile, band moving gear 301 rotates together；
S2. the rotation displacement of 600 stake top of Model Pile is amplified by gear 301, and ratch 303 is driven to move, ratch
The hemisphere at 303 both ends smashes first 307 and squeezes the Hookean spring-slide block assembly or nonlinear spring-slide block assembly being diagonally arranged, tiltedly
306 compressed spring 305 of face sliding block 304 or curved surface sliding block realizes the constraint of stake top linear rigidity or non-linear rigidity constraint.
Before carrying out step S1, hemisphere smashes first 307 and contacts but do not oppress with inclined plane slide block 304 and curved surface sliding block 306.
As shown in figure 11, in the present embodiment, when simulating the constraint of stake top linear rigidity by Hookean spring-slide block assembly, stake
Push up restraining momentTWith stake top cornerαFunctional relation derive following (arrow direction is 305 compression direction of spring in figure):
It is with 305 direction of motion of springxAxis, then hemisphere smashes first 307 direction of motion and isyAxis；
If 304 inclination angle of inclined plane slide block isθ, 305 rigidity of spring isk, hemisphere smash first 307 suffered by counter-force beF y , spring pressure
Power isF x , the hemisphere that inclined plane slide block 304 is subject to smash it is first 307 squeeze generateyDirection displacement (or hemisphere smashes first 307 position
Move) bey, inclined plane slide block 304xAxial displacement isx, it is apparent fromx、yThere are following relationships:
(1)
Inclined plane slide block 304 existsxPower suffered by axis withF x Size is identical and contrary, InyPower suffered by axis isF y Size
Half and contrary, according to force analysis it is found that
(2)
Formula (1) is substituted into formula (2) to obtain,
(3)
In formula,First 307 are smash to hemisphere for Hookean spring-slide block assembly to provideyDirectional stiffness, whereinkWithθ
For constant；
If 301 radius of gear isR, stake top corner isα, the hemisphere that inclined plane slide block 304 is subject to smash it is first 307 squeeze generateyAxial displacementyThe camber line of as 301 edge of gear rotation is long, then has
(4)
Formula (4) are substituted into formula (3) to obtain,
(5)
Then stake top restraining momentTWith stake top cornerαFinal relationship are as follows:
(6)
In formula (6),For the stake top torsional restraint rigidity that Hookean spring-slide block assembly provides, it is constant, shows
Stake top restraining momentTWith stake top cornerαIt is linear.
As shown in Figure 12 or Figure 13, in the present embodiment, stake top linear rigidity is simulated about by nonlinear spring-slide block assembly
Shu Shi, stake top restraining momentTWith stake top cornerαFunctional relation derive that following (arrow direction is 305 side of compression of spring in figure
To):
Coordinate system is established using the vertex of curved surface sliding block 306 or the center of circle as origin, if sliding block curvilinear function is
x=f(y) (7)
If original state lower surface camber sliding block 306 smashes first 307 contact point with hemisphereA(X 0 , Y 0 ), when curved surface sliding block 306
First 307, which are smash, in hemisphere squeezes lower edgeyAxis positive direction moves △yDistance, edgexAxis negative direction moves △xDistance after, at this time
Contact pointB(X 0 ,Y 0 +△y) tangent line withxAxle clamp angle isθIf contact point under original stateAIt arrivesxThe vertical range of axis ist, then have
f(Y 0 )=t (8)
According to Figure 12 or Figure 13, have
△x=f(Y 0 +△y)-f(Y 0 ) (9)
And have
(10)
In nonlinear spring-slide block assemblyF y =2kx/tanθIt still sets up, then has
(11)
Formula (11) is the universal relation expression formula that hemisphere smashes first 307 stress and displacement, when 306 curve of curved surface sliding block
When known to function, it can find outF y With △yBetween physical relationship.
As shown in figure 12, when the curvilinear function of curved surface sliding block 306 isy=x 2When, then, can be obtained by formula (9)
(12)
It is obtained simultaneously by formula (10)
(13)
Formula (12) and formula (13) are substituted into formula (11) to obtain
(14)
When original state,, then haveY 0 =t 2 , substitute into formula (14) and arrange
(15)
It is obtained by formula (4),, substitute into above formula and obtain
(16)
Then stake top restraining momentTWith stake top cornerαFinal relationship are as follows:
(17)
In formula,a,t,kIt is constant, when sliding block is arranged to curved form, stake top restraining momentTWith stake top cornerαIt
Between be in nonlinear function, and stake top restraining momentTWith stake top cornerαIncrease and is gradually reduced.
As shown in figure 13, when the curvilinear function of curved surface sliding block 306 isx 2 +y 2 =a 2 When, i.e.,When, by formula
(9) it can obtain
(18)
It is obtained simultaneously by formula (10)
(19)
Formula (18) and formula (19) are substituted into formula (11) to obtain
(20)
When original state, obtained by formula (8),, then have, substitute into formula (18) and arrange
(21)
It is obtained by formula (4),, substitute into above formula and obtain
(22)
Then stake top restraining momentTWith stake top cornerαFinal relationship are as follows:
(23)
In formula,a,t,kIt is constant, when sliding block is arranged to curved form, stake top restraining momentTWith stake top cornerαIt
Between be in nonlinear function, and stake top restraining momentTWith stake top cornerαIncrease and is gradually reduced.
The above is only the embodiment of the present invention, are not intended to limit the scope of the invention, all to be said using the present invention
Equivalent structure or equivalent flow shift made by bright book content is applied directly or indirectly in other relevant technical fields,
Similarly it is included within the scope of the present invention.
Claims (10)
1. a kind of torque loading device of simulation stake top linearly or nonlinearly deflection constraint, it is characterised in that: including column
(100), torque loading module and stake top torsional restraint module；
The quantity of the column (100) is four, is arranged centered on Model Pile (600) in rectangle, bottom end is fixed on supporting surface
On；
The torque loading module includes for being set in the separator box (201) of Model Pile (600) stake top, with the Model Pile
(600) center line is two loading beams that symmetry axis is symmetrical arranged and first end is fixedly connected with the separator box (201)
(202) and MTS actuator (203)；
The loading beam (202) and MTS actuator (203) are in the same plane parallel with supporting surface；
Perpendicular to the loading beam (202), loading head is connect the MTS actuator (203) with the loading beam (202), and with
The center line of the Model Pile (600) is symmetrical arranged for symmetry axis；
The stake top torsional restraint module includes gear (301), mounting box (302), Hookean spring-slide block assembly, nonlinear elasticity
Spring-slide block assembly and ratch (303)；
Gear (301) central part is fixedly connected with the top surface of the separator box (201)；
The quantity of the mounting box (302) is four, is fixed on the top of the column (100)；
Hookean spring-the slide block assembly and nonlinear spring-slide block assembly quantity are two, are arranged in the mounting box
(302) it in and is arranged diagonal；
Hookean spring-the slide block assembly includes the inclined plane slide block (304) being slidably arranged in the mounting box (302) and connects
Connect the spring (305) of the inclined plane slide block (304) and mounting box (302) inner wall；
The quantity of the inclined plane slide block (304) and spring (305) is two, and the inclined-plane of the inclined plane slide block (304) is opposite
Setting；
Nonlinear spring-the slide block assembly include the curved surface sliding block (306) that is slidably arranged in the mounting box (302) and
Connect the spring (305) of the curved surface sliding block (306) and mounting box (302) inner wall；
The quantity of the curved surface sliding block (306) and spring (305) is two, and the curved surface of the curved surface sliding block (306) is opposite
Setting；
The inclined plane slide block (304) and curved surface sliding block (306) are in the same slip plane parallel with the supporting surface；
The ratch (303) is engaged by the sawtooth portion on the body of rod with the gear (301), and the mounting box is protruded at both ends
(302) hemisphere that is interior and being provided with for squeezing the inclined plane slide block (304) or curved surface sliding block (306) smashes head (307).
2. the torque loading device of simulation stake top linearly or nonlinearly deflection constraint according to claim 1, feature exist
In the stake top torsional restraint module further includes connection frame (308) and sleeve (309)；
The connection frame (308) includes the first connecting rod being oppositely arranged and second connecting rod and connection first connecting rod midpoint and second
The third connecting rod at connecting rod midpoint；
The sleeve (309) is arranged at second connecting rod both ends；
The first connecting rod is for being connected with nonlinear spring-slide block assembly mounting box (302) and the linear bullet of setting
Spring-slide block assembly mounting box (302)；
The smooth body of rod on the ratch (303) positioned at sawtooth portion two sides passes through the sleeve (309), and can be along the sleeve
(309) axial movement.
3. the torque loading device of simulation stake top linearly or nonlinearly deflection constraint according to claim 2, feature exist
Be in the sawtooth portion of, the ratch (303) it is flat, the smooth body of rod positioned at sawtooth portion two sides is cylindric；
The section of the sleeve (309) is square, and is provided on four internal angles and is rolled cooperation with the smooth body of rod
Ball (310).
4. the torque loading device of simulation stake top linearly or nonlinearly deflection constraint according to claim 1-3,
It is characterized in that, the side that the inclined plane slide block (304) and curved surface sliding block (306) are contacted with mounting box (302) inner wall is provided with
Idler wheel (311)；
The sliding slot with the idler wheel (311) cooperation is provided in the upper inside walls and downside inner wall of the mounting box (302).
5. the torque loading device of simulation stake top linearly or nonlinearly deflection constraint according to claim 1-3,
It is characterized in that, the gear (301) be blade type hollow out gear, including outer edge be sawtooth ring part, be arranged described
The blade of the central part at ring part center and the inward flange of the connection ring part and the central part.
6. the torque loading device of simulation stake top linearly or nonlinearly deflection constraint according to claim 1-3,
It is characterized in that, the inner peripheral surface of the separator box (201) and the outer peripheral surface of Model Pile (600) stake top agree with, including two can divide
From cabinet；
Two cabinets are that symmetrical axial symmetry is set in the Model Pile (600) with the center line of the Model Pile (600)
Stake top is connected by split bolt；
The loading beam (202) is I-steel, is welded with the separator box (201), the load with the MTS actuator (203)
Hook bolt connection；
The gear (301) is bolted with the separator box (201).
7. the torque loading device of simulation stake top linearly or nonlinearly deflection constraint according to claim 6, feature exist
In being welded with multiple ribbed stiffeners (204) between two edges of a wing of the I-steel.
8. the torque loading device of simulation stake top linearly or nonlinearly deflection constraint according to claim 1, feature exist
In further including the counter force wall (400) for fixing MTS actuator (203) end.
9. the torque loading device of the linearly or nonlinearly deflection constraint of simulation stake top according to claim 1 or 8, feature
It is, further includes the model casing (500) for fixed model stake (600), filled model clay in the model casing (500).
10. a kind of method of simulation stake top linearly or nonlinearly deflection constraint, which is characterized in that the method is based on claim
1-9 it is described in any item simulation stake tops linearly or nonlinearly deflection constraint torque loading device implement, include the following steps:
S1. MTS actuator (203) are opened, a pair of equal in magnitude, contrary couple of force is applied to loading beam (202), and lead to
It crosses separator box (201) and torque is acted on into Model Pile (600) stake top, band moving gear (301) rotates together；
S2. the rotation displacement of Model Pile (600) stake top is amplified by gear (301), and ratch (303) is driven to move, ratch
(303) hemisphere at both ends smashes head (307) and squeezes the Hookean spring-slide block assembly being diagonally arranged or nonlinear spring-sliding block group
Part, inclined plane slide block (304) or curved surface sliding block (306) compressed spring (305) realize the constraint of stake top linear rigidity or non-linear rigidity
Constraint.
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| CN201810119082.XA CN108360577B (en) | 2018-02-06 | 2018-02-06 | Simulate the torque loading device and method of stake top linearly or nonlinearly deflection constraint |
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| CN113533028B (en) * | 2021-08-18 | 2022-10-14 | 天津大学 | Multi-degree-of-freedom elastic rotation constraint simulation system |
| CN113884289B (en) * | 2021-09-27 | 2022-09-16 | 天津大学 | End part restraint device for deep water steel catenary riser contact section test platform |
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| CN1277996C (en) * | 2003-09-26 | 2006-10-04 | 中国科学院武汉岩土力学研究所 | Model test equipment for unsaturated earth pile base |
| JP2009062785A (en) * | 2007-09-10 | 2009-03-26 | Ochiken Kk | Method of analyzing settlement of group pile foundation and pile draft foundation on multilayered ground by using generalized equivalent elasticity method |
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