CN107587886A - Utilize the big stroke template damper of performance behind material peak - Google Patents
Utilize the big stroke template damper of performance behind material peak Download PDFInfo
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- CN107587886A CN107587886A CN201710998288.XA CN201710998288A CN107587886A CN 107587886 A CN107587886 A CN 107587886A CN 201710998288 A CN201710998288 A CN 201710998288A CN 107587886 A CN107587886 A CN 107587886A
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- 239000000463 material Substances 0.000 title claims abstract description 20
- 238000013016 damping Methods 0.000 claims abstract description 102
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- 238000010276 construction Methods 0.000 description 9
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- 238000012856 packing Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- 238000009434 installation Methods 0.000 description 2
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- 239000004744 fabric Substances 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The big stroke template damper of performance behind a kind of peak using material, including the first connecting plate, the second connecting plate and template damping piece, first connecting plate and second connecting plate be arranged in parallel face-to-face, between first connecting plate and second connecting plate, the template damping piece is fixedly connected the template damping piece with first connecting plate with second connecting plate respectively；The template damping piece can deform upon when the plane normal side of first connecting plate and second connecting plate is pressed up.Template damping piece is clamped in centre by the first connecting plate, when the first connecting plate and the second connecting plate are squeezed power, template damping piece is also squeezed, in damper deformation process, country rock is allowed to produce contraction distortion while damper cooperates with tunnel structure to surrounding rock supporting, control tunnel structure internal force, release pressure from surrounding rock are realized, increases integrally-built safety coefficient.
Description
Technical field
The present invention relates to Tunnel Engineering field, and in particular to the big stroke template damping of performance behind a kind of peak using material
Device.
Background technology
China is in Tunnel Engineering and builds the high-speed developing period, is largely related to country rock in fields such as traffic, mine, water conservancies
Stability problem.Large deformation problem is commonly encountered when tunnel structure passes through weakness, breaking surrounding rock stratum, tunnel surrounding is shown as and holds
Continuous deflection is big, the breakaway of preliminary bracing concrete, chip off-falling, crushing, steelframe distortion, cause difficulty of construction is big, construction speed slowly,
Disease management is difficult, construction risk increases, construction cost increases sharply.
When running into large deformation disease, existing countermeasure is mostly that anchor pole, back-grouting are set at structure destruction, is performed
Cover arch, change preliminary bracing etc., in place's strengthening supporting parameter of not constructing, such as set anchor pole (rope), grouting with small pipe, increase to spray and mix
Solidifying soil thickness etc., but practice have shown that, simple increase supporting parameter can not effectively administer large deformation problem, such as Mu Zhai ridges tunnel
Sub- tunnel of road, new city etc., its construction period multiple strengthening supporting parameter, the lining of change two perform opportunity, repeatedly change initial stage repeatedly
Large deformation problem is not solved after supporting still.To find out its cause, the deformation pressure brought for surrouding rock deformation that tunnel support structure is subject to
Power, the simple deformation pressure brought by the hard anti-country rock of Support Resistance be it is infeasible, it is above-mentioned to be changed repeatedly in construction
The behavior for the preliminary bracing that gross distortion destroys occurs, its essence is exactly the progressively deformation release country rock under the constraint of supporting in the early stage
The process of deformation pressure, until pressure from surrounding rock release finishes, cavern can just tend towards stability.
Now, " anti-to put combination " supporting construction has constant resistance and large deformation anchor rod (rope) and scalable steelframe.Constant resistance and large deformation anchor
The anchor pole (rope) that bar (rope) can significantly be deformed in the case where providing constant operation resistance, " constant-resistance device " can be referred to as,
It is applied in the mine working of many places, its application method is to set constant resistance and large deformation anchor rod (rope) system, anchor in tunnel-surrounding
300mm-1000mm deflection can persistently occur in the case where providing 120-130kN working resistance for bar (rope), pass through anchor pole (rope)
System carries out supporting to tunnel.Using U-shaped steel and slidably, joint, steelframe can provide certain Support Resistance to scalable steelframe
Under, circumferentially compression.
Perseverance group large deformation anchor rod (rope) and scalable steelframe are mainly used in mine working, are not suitable for Tunnel Engineering, because
It is independent work system, and performing preliminary bracing after being excavated in tunnel needs gunite concrete, concrete structure
Variability capacity is limited, once preliminary bracing forms the concrete structure of closing, perseverance is organized large deformation anchor rod (rope) and can stretched
Contracting steelframe just loses the meaning of its setting.
The content of the invention
The present invention in view of the shortcomings of the prior art, proposes a kind of big stroke template damper of performance behind peak using material,
While being played a supporting role to tunnel, a range of deformation can also be provided, realizes the pressure release in tunnel, specific skill
Art scheme is as follows：
The big stroke template damper of performance behind a kind of peak using material, including the first connecting plate, the second connecting plate and plate
Type damping piece, first connecting plate and second connecting plate be arranged in parallel face-to-face, and the template damping piece is positioned at described
Between first connecting plate and second connecting plate, the template damping piece connects with first connecting plate and described second respectively
Fishplate bar is fixedly connected；
When the template damping piece is pressed up in the plane normal side of first connecting plate and second connecting plate
Generation compressive deformation.
Template damping piece is clamped in centre by effect, connecting plate, when the first connecting plate and the second connecting plate are squeezed power
When, template damping piece is also squeezed, and template damping piece deforms upon, and deformation mainly divides 4 stages, and the 1st stage was hindered for template
The elastic deformation stage of damping member, pressure is linearly increasing with deforming, and the 2nd stage declined deformation stage for the surrender of template damping piece,
Pressure declines with deformation, and the 3rd stage was the surrender residual deformation stage of template damping piece, and pressure is constant with deforming, and the 4th stage was
The compacting deformation stage of template damping piece, pressure increase with deformation, wherein the 3rd stage was the big stroke using performance behind material peak
The main body of template damper deformation, damper continue large deformation under constant pressure, and the deformation of template damping piece drives overall branch
Protection structure produces contraction distortion, so as to realize control tunnel structure internal force, release pressure from surrounding rock, increases integrally-built safety system
Number.
Damper utilizes performance behind strength of materials peak, can be in the case where providing certain resistance, it is allowed to larger compression displacement；
Resistance and range can adjust behind the hump drag of damper, peak；The deformation direction of damper can control, and be worked in big stroke
When, the damper after deformation does not invade tunnel clearance；Damper can pass through bolt hole and dowel and the tunnel of diversified forms
Supporting construction and its combination of a variety of positions；Tunnel structure is except normal section eccentric compression, also by cutting radially
Shear force, damper have enough anti-shear abilities；Damper can be mutually connected in tunnel by connecting plate and longitudinally form elongated beam；
After demarcating damper " load-displacement " curve, structural internal force or pressure from surrounding rock can be determined according to the displacement of damper；Damper
Injection or casting concrete can be used locked with the interim function of increasing resistance of realization.
The restriction of parallel technical solution one, the template damping piece are rectangle damping sheet, a pair of the rectangle damping sheet
While it is separately fixed in the plate face of first connecting plate and second connecting plate.
The further restriction of parallel technical solution one, the template damping piece includes vertical panel and hang plate, described vertical
For plate perpendicular to the plate face of first connecting plate and the second connecting plate, the hang plate and the vertical panel are described to incline into angle
Swash plate is interspersed among the interval that each vertical panel is formed.
If damper is all using parallel portrait, unstable along longitudinal direction when being pressurized, easily tilt, hang plate can increase resistance
The longitudinal stability of Buddhist nun's device, ensure when damper deforms not along fore-and-aft tilt.
The restriction of parallel technical solution two, the template damping piece are curved damping sheet, the bus of the curved damping sheet
For straight line, and the bus of the curved damping sheet parallel to first connecting plate and the second connecting plate plate face, the song
One opposite side of shape damping sheet is separately fixed in the plate face of first connecting plate and second connecting plate.
The pressure peak in the 1st stage of the curvature-adjustable section damping sheet deformation of curved damping sheet is adjusted, damping sheet curvature is got over
Greatly, pressure peak is smaller, and when curved damping sheet bends to semi arch, the pressure peak in the 1st stage is equal to the residual of phase III
Remaining constant pressure, and curved damping sheet can control the surrender bending direction of damping sheet, ensure each damping sheet in flexural deformation not
Extruding mutually, so that influenceing the constant yield force of damper.
The further restriction of parallel technical solution two, resistance is additionally provided between first connecting plate and second connecting plate
Buddhist nun manages, and the damper tube cross section is circular or ellipse, the side face of the damper tube and first connecting plate and described
The plate face of second connecting plate is fixedly connected；
The damper tube is interspersed between each curved damping sheet, and the diameter parallel of the damper tube is in the song
The bus of shape damping sheet.
Effect, damper tube non-plastic decline stage, its elastic peak are equal to surrender residual value, in actual tunnel application,
Damper is needed to possess certain elastic peak, to ensure construction and excavation stability and security, therefore damper tube is worn with curved damping sheet
Arrangement is inserted, assigns the elastic peak of the capability of damper one.
The restriction of parallel technical solution three, the template damping piece are ripple damping sheet, the crest of the ripple damping sheet
It is separately fixed at trough on the plate of first connecting plate and second connecting plate.
Adjust the ripple radius of corrugated plating and the elastic peak with wave height adjustable dampers.
The further restriction of parallel technical solution three, the ripple damping sheet has two groups of superpositions, and ripple described in one group hinders
The crest of Buddhist nun's plate is fixed on described in described another group on the trough of ripple damping sheet.
The limited height of single corrugated plating, by being superimposed corrugated plating, damper can be increased in the case where bearing capacity is constant
One times of deformable height.
The further restriction of all of above technical scheme, first connecting plate and second connecting plate are provided with connection
Muscle, the dowel are vertically fixed in the plate face of first connecting plate and second connecting plate.
Hung down in the plate face of the further restriction of all of above technical scheme, first connecting plate and second connecting plate
Head straight for being provided with bolt hole.
Beneficial effects of the present invention are：Template damping piece is passed to by the first connecting plate and the second connecting plate stress, made
The deformation of template damping piece is obtained, so as to realize that the pressure in tunnel discharges so that the structural stability in tunnel is more preferable, the resistance of plate profile structure
Damping member is more uniformly stressed, and the deformation difference at each position is smaller.The present invention not only may be mounted at conduct on tunnel ring
The damping deformation of ring, damping of the tunnel radially as radial direction can also be arranged on and deformed.The present invention can carry out it is prefabricated, so
Installed afterwards in constructing tunnel, it is easily manufactured, and installation is also convenient for.
Brief description of the drawings
Fig. 1 is the structural representation of embodiments of the invention one.
Fig. 2 is the structural representation of the embodiment of the present invention two.
Fig. 3 is the structural representation of the embodiment of the present invention three.
Fig. 4 is the structural representation of the embodiment of the present invention four.
Fig. 5 is the structural representation of the embodiment of the present invention five.
Fig. 6 is the structural representation of the embodiment of the present invention six.
Fig. 7 is the structural representation of the embodiment of the present invention seven.
Fig. 8 is the structural representation when damper of embodiment one installs dowel 4 and is provided with bolt hole.
Structural representation when Fig. 9 is damper and the steelframe installation cooperation of embodiment one.
Figure 10 is the deformation process schematic diagram of the damper of embodiment one.
Figure 11 is the pressure and deformational displacement relation schematic diagram of the damper of embodiment one.
Embodiment
Presently preferred embodiments of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent is clearly defined so as to be made to protection scope of the present invention.
As shown in figure 1, embodiment one, the big stroke template damper of performance behind a kind of peak using material, including first connect
Fishplate bar 1, the second connecting plate 2 and template damping piece, template damping piece are made up of mild steel, and first connector 1 and second connects
The width of fitting 2 is more than the width of template damping piece, and first connecting plate 1 and second connecting plate 2 are parallel face-to-face to be set
Put, the template damping piece is between first connecting plate 1 and second connecting plate 2, the template damping piece difference
It is fixedly connected with first connecting plate 1 with second connecting plate 2；The template damping piece is in the He of the first connecting plate 1
When being pressed up compressive deformation occurs for the plane normal side of second connecting plate 2.
The template damping piece is rectangle damping sheet 31, and is parallel to each other between each rectangle damping sheet 31, the rectangle
One opposite side of damping sheet 31 is separately fixed in the plate face of first connecting plate 1 and second connecting plate 2, the rectangular resistance
Buddhist nun's plate 31 is perpendicular to first connecting plate 1 and second connecting plate 2.
As shown in Fig. 2 embodiment two, and the difference of embodiment one are, the rectangle damping sheet 31 connects with described first
Fishplate bar 1 and second connecting plate 2 are at an acute angle.
As shown in figure 3, embodiment three, for the combination of embodiment one and embodiment two, the template damping piece includes vertical
Plate 311 and hang plate 312, the vertical panel 311 perpendicular to the connecting plate 2 of the first connecting plate 1 and second plate face, it is described to incline
Swash plate 312 and the vertical panel 311 into angle, the hang plate 312 be interspersed in interval that each vertical panel 311 formed it
In.
As shown in figure 4, example IV, the big stroke template damper of performance behind a kind of peak using material, including first connect
Fishplate bar 1, the second connecting plate 2 and template damping piece, first connecting plate 1 and second connecting plate 2 be arranged in parallel face-to-face,
The template damping piece is between first connecting plate 1 and second connecting plate 2, and the template damping piece is respectively and institute
The first connecting plate 1 is stated to be fixedly connected with second connecting plate 2；The template damping piece is in first connecting plate 1 and described
When being pressed up compressive deformation occurs for the plane normal side of the second connecting plate 2.
It is curved damping sheet 32 to state template damping piece, and the bus of the curved damping sheet 32 is straight line, and the curved resistance
The bus of Buddhist nun's plate 32 parallel to first connecting plate 1 and the second connecting plate 2 plate face, a pair of the curved damping sheet 32
While it is separately fixed in the plate face of first connecting plate 1 and second connecting plate 2.
As shown in figure 5, embodiment five, is increased on the basis of embodiment three, first connecting plate 1 and described
Damper tube 33 is additionally provided between second connecting plate 2, the cross section of damper tube 33 is circular or oval, the damper tube 33
Side face be fixedly connected with the plate face of first connecting plate 1 with second connecting plate 2；
The damper tube 33 is interspersed between each curved damping sheet 32, and the diameter parallel of the damper tube 33 in
The bus of the curved damping sheet 32.
As shown in fig. 6, embodiment six, the big stroke template damper of performance behind a kind of peak using material, including first connect
Fishplate bar 1, the second connecting plate 2 and template damping piece, first connecting plate 1 and second connecting plate 2 be arranged in parallel face-to-face,
The template damping piece is between first connecting plate 1 and second connecting plate 2, and the template damping piece is respectively and institute
The first connecting plate 1 is stated to be fixedly connected with second connecting plate 2；The template damping piece is in first connecting plate 1 and described
When being pressed up compressive deformation occurs for the plane normal side of the second connecting plate 2.
The template damping piece is ripple damping sheet 34, and the crest and trough of the ripple damping sheet 34 are separately fixed at institute
On the plate for stating the first connecting plate 1 and second connecting plate 2.
As shown in fig. 7, embodiment seven, is increased on the basis of embodiment six, the ripple damping sheet 34 has two
Group superposition, and the crest of ripple damping sheet 34 described in one group is fixed on described in described another group on the trough of ripple damping sheet 34.
As shown in Figure 8, Figure 9, on the basis of embodiment one, set on first connecting plate 1 and second connecting plate 2
There is dowel 4, the dowel 4 is vertically fixed in the plate face of first connecting plate 1 and second connecting plate 2.It is described
Bolt hole 5 is vertically offered in the plate face of first connecting plate 1 and second connecting plate 2.
Dowel 4 and bolt hole 5 can be set in above example, and here is omitted.
As shown in figure 9, embodiment one coordinates as the damper on ring direction, the damper and steelframe 6 of embodiment one,
Steelframe 6 is grid steel frame 6 or shaped steel, and steelframe 6 is separated, hindered in Fig. 9 by the inner wall shape matching in steelframe 6 and tunnel, damper
Buddhist nun's device is perpendicular to the steelframe 6, and now variable shaped steel frame 6 is separately fixed at the first connecting plate of damper on the ring in tunnel
1 and second on connecting plate 2, and steelframe 6 then pressure transmission is given the first connecting plate 1 and the second connecting plate 2 by the pressure of country rock.
Embodiment one is only listed herein, and other embodiment repeats no more.
Not shown, embodiment one is as radially to the damper on direction, and the damper of embodiment one is in tunnel radial direction cloth
Put, the first connecting plate 1 of damper is fixed on steelframe 6, the second connecting plate 2 and country rock contact.Embodiment is only listed herein
One, other embodiment repeats no more.
As shown in Figure 10, P is load, and U is deformational displacement, and damper is pressurized from elastic deformation, to yield deformation, then to most
It is compacted eventually.In damper deformation process, country rock is allowed to produce receipts while damper cooperates with tunnel structure to surrounding rock supporting
Compression deformation, discharge pressure from surrounding rock.In practice, pressure from surrounding rock discharges in the yield deformation stage of damper to be completed, if enclosing
Rock pressure power does not discharge in the damper yield deformation stage to be completed, then the packing stage of damper can provide final safety assurance.
As shown in figure 11, rectangle damping sheet 31 includes four-stage in deformation process, and 1, elastic stage, 2, surrender declines
Stage, 3, surrender remaining stage, 4, packing stage, increase in elastic stage extruding force with linear displacement, elastic displacement is smaller,
The decline stage is surrendered, extruding force diminishes, but deformational displacement continues to become big, is surrendering the remaining stage, extruding force is constant, deformation position
Shifting continues to become big, and in packing stage, extruding force becomes big, and damper is gradually compacted, and last safety assurance is provided for structure.
Claims (9)
- A kind of 1. big stroke template damper of performance behind peak using material, it is characterised in that：Including the first connecting plate (1), Two connecting plates (2) and template damping piece, first connecting plate (1) and second connecting plate (2) be arranged in parallel face-to-face, institute Template damping piece is stated between first connecting plate (1) and second connecting plate (2), the template damping piece respectively and First connecting plate (1) is fixedly connected with second connecting plate (2)；The template damping piece is pressed up in the plane normal side of first connecting plate (1) and second connecting plate (2) Shi Fasheng compressive deformations.
- 2. the big stroke template damper of performance behind a kind of peak using material according to claim 1, it is characterised in that：Institute It is rectangle damping sheet (31) to state template damping piece, and an opposite side of the rectangle damping sheet (31) is separately fixed at first connection In the plate face of plate (1) and second connecting plate (2).
- 3. the big stroke template damper of performance behind a kind of peak using material according to claim 2, it is characterised in that：Institute Stating template damping piece includes vertical panel (311) and hang plate (312), and the vertical panel (311) is perpendicular to first connecting plate (1) and the second connecting plate (2) plate face, the hang plate (312) and the vertical panel (311) are into angle, the hang plate (312) it is interspersed among the interval that each vertical panel (311) is formed.
- 4. the big stroke template damper of performance behind a kind of peak using material according to claim 1, it is characterised in that：Institute It is curved damping sheet (32) to state template damping piece, and the bus of the curved damping sheet (32) is straight line, and the curved damping sheet (32) bus parallel to first connecting plate (1) and the second connecting plate (2) plate face, the curved damping sheet (32) One opposite side is separately fixed in the plate face of first connecting plate (1) and second connecting plate (2).
- 5. the big stroke template damper of performance behind a kind of peak using material according to claim 4, it is characterised in that：Institute State and damper tube (33) is additionally provided between the first connecting plate (1) and second connecting plate (2), damper tube (33) cross section is Circular or ellipse, the side face and the plate of first connecting plate (1) and second connecting plate (2) of the damper tube (33) Face is fixedly connected；The damper tube (33) is interspersed between each curved damping sheet (32), and the diameter parallel of the damper tube (33) In the bus of the curved damping sheet (32).
- 6. the big stroke template damper of performance behind a kind of peak using material according to claim 1, it is characterised in that：Institute It is ripple damping sheet (34) to state template damping piece, and the crest and trough of the ripple damping sheet (34) are separately fixed at described first On the plate of connecting plate (1) and second connecting plate (2).
- 7. the big stroke template damper of performance behind a kind of peak using material according to claim 6, it is characterised in that：Institute Stating ripple damping sheet (34) has two groups of superpositions, and the crest of ripple damping sheet (34) is fixed on described in described another group described in one group On the trough of ripple damping sheet (34).
- 8. according to the big stroke template damper of performance behind a kind of any described peaks using material of claim 1-7, its feature It is：First connecting plate (1) and second connecting plate (2) are provided with dowel (4), and the dowel (4) is fixed on In the plate face of first connecting plate (1) and second connecting plate (2).
- 9. according to the big stroke template damper of performance behind a kind of any described peaks using material of claim 1-7, its feature It is：Bolt hole (5) is offered in the plate face of first connecting plate (1) and second connecting plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710998288.XA CN107587886A (en) | 2017-10-24 | 2017-10-24 | Utilize the big stroke template damper of performance behind material peak |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710998288.XA CN107587886A (en) | 2017-10-24 | 2017-10-24 | Utilize the big stroke template damper of performance behind material peak |
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| CN107587886A true CN107587886A (en) | 2018-01-16 |
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| CN201710998288.XA Pending CN107587886A (en) | 2017-10-24 | 2017-10-24 | Utilize the big stroke template damper of performance behind material peak |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1550619A (en) * | 2003-05-16 | 2004-12-01 | 新日本制铁株式会社 | Anti-shock device |
| CN200943269Y (en) * | 2006-07-17 | 2007-09-05 | 杭州强立机械有限公司 | V-shaped damping composite armored wall of anti-explosion partition chamber |
| CN101629432A (en) * | 2009-08-21 | 2010-01-20 | 清华大学 | Shearing-type metal bending energy-wasting damper |
| CN203007837U (en) * | 2013-01-15 | 2013-06-19 | 长安大学 | Steel bridge deck based on dual-layer corrugated steel plates and rubber sandwich plates |
| CN203742013U (en) * | 2014-02-14 | 2014-07-30 | 上海大学 | Double-tilt-corrugated metal shear plate damper |
| CN205088817U (en) * | 2015-11-13 | 2016-03-16 | 天津中技重钢结构有限公司 | Open round hole shearing damper |
| CN205638510U (en) * | 2016-04-22 | 2016-10-12 | 华北水利水电大学 | Stock lets presses pallet means |
| CN106401003A (en) * | 2016-11-22 | 2017-02-15 | 上海天华建筑设计有限公司 | Multi-working condition work mild steel energy dissipation machine |
| CN207278278U (en) * | 2017-10-24 | 2018-04-27 | 仇文革 | Utilize the big stroke template damper of performance behind material peak |
-
2017
- 2017-10-24 CN CN201710998288.XA patent/CN107587886A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1550619A (en) * | 2003-05-16 | 2004-12-01 | 新日本制铁株式会社 | Anti-shock device |
| CN200943269Y (en) * | 2006-07-17 | 2007-09-05 | 杭州强立机械有限公司 | V-shaped damping composite armored wall of anti-explosion partition chamber |
| CN101629432A (en) * | 2009-08-21 | 2010-01-20 | 清华大学 | Shearing-type metal bending energy-wasting damper |
| CN203007837U (en) * | 2013-01-15 | 2013-06-19 | 长安大学 | Steel bridge deck based on dual-layer corrugated steel plates and rubber sandwich plates |
| CN203742013U (en) * | 2014-02-14 | 2014-07-30 | 上海大学 | Double-tilt-corrugated metal shear plate damper |
| CN205088817U (en) * | 2015-11-13 | 2016-03-16 | 天津中技重钢结构有限公司 | Open round hole shearing damper |
| CN205638510U (en) * | 2016-04-22 | 2016-10-12 | 华北水利水电大学 | Stock lets presses pallet means |
| CN106401003A (en) * | 2016-11-22 | 2017-02-15 | 上海天华建筑设计有限公司 | Multi-working condition work mild steel energy dissipation machine |
| CN207278278U (en) * | 2017-10-24 | 2018-04-27 | 仇文革 | Utilize the big stroke template damper of performance behind material peak |
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