CN109826321B - Self-resetting method for temperature self-resetting node of frame-skin structure - Google Patents
Self-resetting method for temperature self-resetting node of frame-skin structure Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 168
- 239000010959 steel Substances 0.000 claims abstract description 168
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 61
- 238000006073 displacement reaction Methods 0.000 claims abstract description 22
- 230000006870 function Effects 0.000 claims abstract description 13
- 230000006386 memory function Effects 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 8
- 239000000084 colloidal system Substances 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 5
- 241001391944 Commicarpus scandens Species 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention relates to a self-resetting method of a temperature self-resetting node of a frame-skin structure, belongs to the field of frame-skin structures, and solves the problem that a colloid between a skin plate and a steel plate belt is easy to break or the node is easy to deform under a temperature stress field. The self-resetting method firstly determines the deformation displacement of the skin plate and the internal steel frame at high temperature, further determines the structural shape of the shape memory alloy, then adopts angle steel to connect the steel frame, adopts a steel plate belt to connect the skin plate, adopts a steel plate belt to weld a bolt rod, adopts the shape memory alloy to connect the bolt rod and the angle steel, and realizes the temperature stress release and the self-resetting function of the node through the two-way memory function of the shape memory alloy. The temperature self-reset node realizes stress release through the sliding groove under the condition of temperature change, and realizes self-reset through the two-way memory alloy. The structure local stress distribution can be adjusted, and the condition that the structure is easy to damage and deform under the action of local stress is improved.
Description
Technical Field
The invention relates to the field of frame-skin structures, in particular to a self-resetting method of a temperature self-resetting node of a frame-skin structure.
Background
Along with the development of the economic society, more and more buildings are supported by an internal steel frame and have skin plates as the external parts, and the buildings are often symbolic buildings of tourist attractions. For example: the exterior of the Shandong Maitreya Buddha is formed by a steel plate with the thickness of 3mm, the skin is partially supported on a steel frame structure, and the steel frame is supported on a bottom concrete plate.
Because the copper plate of gold plating and the inner steel frame are welded, the outer gold plating can be heated and fall off, so that the welding form can not be adopted. More importantly, the temperature of the heated surface of the copper plate reaches about 75 ℃ at noon (40 ℃) in high-temperature weather; at night, when the temperature is 10 ℃, the structure is in a temperature stress field, and part of the skin plate and the joint bear larger stress, so that the shearing damage of the colloid between the skin plate and the steel plate belt is easily caused, and even the deformation of the skin plate and the joint is easily caused.
In recent years, some temperature stress release nodes begin to appear, and the nodes are mostly appeared in a steel frame structure and can meet the requirement of structural deformation under temperature stress. But such nodes often fail to meet the needs for structure reset. In addition, less research is done on the connection nodes of the frame-skin structure, which more require temperature nodes for stress relief.
Shape memory alloys achieve self-resetting properties based on the shape's own martensite-austenite transformation characteristics. The alloy structure often has deformation temperature, and the two-way memory alloy recovers a high-temperature phase shape when the temperature rises to exceed the deformation temperature, and recovers a low-temperature phase shape when the temperature is cooled to be lower than the deformation temperature, so that the two-way memory alloy has a two-way memory effect. Therefore, the invention aims to apply the self-resetting performance of the shape memory alloy, and provides a self-resetting method of a temperature self-resetting node of a frame-skin structure, which is used for overcoming the defect that the structure can adjust the local stress distribution of the structure through deformation under the condition of temperature change, and improving the condition that the structure is easy to damage and deform under the action of local stress. The node is subjected to stress release through the sliding groove, and self-reset is realized through the two-way memory alloy.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide a self-resetting method for a temperature self-resetting node of a frame-skin structure, so as to solve the problem that the structure at the node is easy to be damaged and deformed under the stress action due to the deformation of a skin plate when the temperature of the existing fixed node changes.
The purpose of the invention is mainly realized by the following technical scheme:
a self-resetting method of a frame-skin structure temperature self-resetting node comprises the following steps:
s1, determining relative deformation displacement of a skin plate and an internal steel frame under different temperature conditions due to inconsistent structural deformation;
s2, setting the structural shapes of the shape memory alloy at different temperatures according to the deformation displacement of the skin plate and the internal steel frame;
s3, connecting an inner steel frame through angle steel, connecting a steel plate belt with an outer skin plate, welding a bolt rod on the steel plate belt, and connecting the bolt rod and the angle steel through shape memory alloy;
and S4, realizing the temperature stress release and self-reset functions of the nodes through the two-way memory function of the shape memory alloy.
In step S4, when the ambient temperature is at a certain temperature, the shape memory alloy recovers the shape corresponding to the temperature, and at the same time, the angle steel is driven to slide relative to the bolt bar or the steel plate belt; the sliding displacement of the angle steel is the same as the deformation displacement of the skin plate relative to the internal steel frame, and the structural stress generated due to inconsistent temperature deformation is released.
When the environment temperature returns to the initial temperature, the shape memory alloy also returns to the initial shape, and meanwhile, the angle steel is driven to return to the initial position, and the self-resetting function is achieved.
Specifically, the temperature self-reset node comprises: the steel plate comprises a steel plate strip, shape memory alloy, a bolt cap, a bolt rod and angle steel; one side of the steel plate belt is fixedly connected with the skin plate, and the other side of the steel plate belt is fixedly connected with the bolt rod; the angle steel is provided with a sliding groove, sleeved on the bolt rod through the sliding groove and fixed between the steel plate strip and the bolt cap through the bolt cap; two ends of the shape memory alloy are respectively and fixedly connected with the bolt rod and the angle steel.
Specifically, the steel sheet strip is adhered to the skin sheet by structural adhesive.
Specifically, the bolt shank is welded to the steel plate strip.
Specifically, the shape memory alloy is a rectangular parallelepiped strip-shaped structure.
Specifically, the angle steel is of a bent plate structure; the angle steel is connected with the internal steel frame through bolts.
Specifically, the sliding groove is a rectangular through hole, and the width of the sliding groove is larger than the diameter of the bolt rod and smaller than the diameter of the bolt cap.
Specifically, the length of the sliding groove is greater than the sum of the maximum length of the shape memory alloy and the diameter of the bolt cap.
The invention has the following beneficial effects:
1. according to the frame-skin structure temperature self-resetting node, when the skin plate structure deforms due to temperature change, the local stress distribution of the structure can be adjusted through deformation of the shape memory alloy, and the condition that the structure is damaged and deformed under the action of local stress is improved.
2. The invention provides a self-resetting method of a temperature self-resetting node of a frame-skin structure, which is used for overcoming the defect that the structure can adjust the local stress distribution of the structure through deformation under the condition of temperature change, and improving the condition that the structure is easy to damage and deform under the action of local stress. The node is subjected to stress release through the sliding groove, and self-reset is realized through the two-way memory alloy.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic structural view of a frame-skin structure self-resetting node;
fig. 2 is a schematic view of the connection of the self-reset node and the internal steel frame.
Reference numerals:
1-a skin sheet; 2-steel plate strips; 3-shape memory alloy; 4-stud cap; 5-a threaded post; 6-angle steel; 7-internal steel frame; 8-sliding groove.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
In one aspect, the invention provides a self-resetting method for applying the temperature self-resetting node of the frame-skin structure, which comprises the following steps:
s1, determining relative deformation displacement of a skin plate 1 and an internal steel frame 7 under different temperature conditions due to temperature change; further, setting the structural shape of the shape memory alloy 3 at different temperatures;
s2, adhering the steel plate strip 2 to the skin plate 1; welding a bolt rod 5 on the steel plate strip 2;
s3, sleeving the angle steel 6 on the bolt rod 5 through the sliding groove 8, and screwing and fixing the angle steel through the bolt cap 4;
s4, fixedly connecting the shape memory alloy 3 between the bolt rod 5 and the angle steel 6;
s5, when the environment temperature is at a certain temperature, the shape memory alloy 3 recovers the shape corresponding to the temperature, and meanwhile, the angle steel 6 is driven to slide relative to the bolt rod 5 or the steel plate strip 2; the sliding displacement of the angle steel 6 is the same as the deformation displacement of the skin plate 1 relative to the internal steel frame 7, and the structural stress generated by inconsistent temperature deformation is released;
s6, when the environment temperature returns to the initial temperature, the shape memory alloy 3 also returns to the initial shape, and meanwhile, the angle steel 6 is driven to return to the initial position, and the self-resetting function is achieved.
According to the frame-skin structure temperature self-resetting method, the angle steel 6 is connected with the inner steel frame 7, the steel plate belt 2 is connected with the outer skin plate 1, the angle steel 6 and the steel plate belt 2 are not directly fixed, the bolt rod 5 is welded on the steel plate belt 2, the bolt rod 5 and the angle steel 6 are connected through the shape memory alloy 3, and the bolt cap 4 is additionally arranged for fixing, so that the fastening connection between the angle steel 6 and the steel plate belt 2 is realized, and the relative sliding of the angle steel 6 relative to the steel plate belt 2 is also realized.
According to the self-resetting method, the node stress generated by inconsistent temperature deformation of the skin plate 1 and the internal steel frame 7, even the node deformation, is externalized into the relative sliding of the angle steel 6 relative to the steel plate strip 2, so that the temperature stress generated by inconsistent deformation is released.
In step S1, since the shape of the copper plate of the skin plate 1 is not necessarily a regular plate structure in the actual working condition, the structural shape of the skin plate 1 also affects the direction of the stress that the node structure is predicted to bear when the skin plate is deformed at a high temperature, and the structural shape and specific parameters of the two-way memory shape memory alloy 3 are determined according to the actual conditions.
In steps S5 and S6, due to the shape memory function of the shape memory alloy, the sliding displacement of the angle steel 6 is the same as the deformation displacement of the skin plate 1 relative to the internal steel frame 7, and after the temperature is recovered, the double-pass memory function of the shape memory alloy 3 between the angle steel 6 and the bolt rod 5 ensures that the angle steel has the self-resetting function.
Meanwhile, the relative displacement on the self-resetting node structure is completed through the shape memory alloy and is limited by the shape memory alloy, so that the self-resetting node structure is not influenced by other loads such as wind load and the like, does not deform under the wind load condition, and ensures the connection tightness and the structural stability of the whole structure.
In another aspect, an embodiment of the invention discloses a frame-skin structure temperature self-resetting node, which is shown in fig. 1-2 and comprises a steel plate strip 2, a shape memory alloy 3, a bolt cap 4, a bolt rod 5 and angle steel 6.
One side of the steel plate strip 2 is connected with the skin plate 1, and the other side is connected with the bolt rod 5.
The angle steel 6 is provided with a sliding groove 8, one end of the angle steel 6 is sleeved on the bolt rod 5 through the sliding groove 8 and fixed on the steel plate strip 2 through the bolt cap 4, and the other end of the angle steel is connected with the internal steel frame 7.
The shape memory alloy 3 is arranged between one end of the angle steel 6, connected with the internal steel frame 7, and the bolt rod 5, and the shape memory alloy 3 is used for adjusting the stress distribution of the node to realize the self-resetting function.
The existing fixed node is in a high-temperature state, because the temperature of an external skin is higher and is heated to generate expansion, the temperature of an internal steel frame 7 is lower, the material deformation coefficients are different, and at the joint of the skin plate 1 and a steel support, larger temperature stress can appear, so that the colloid between the skin plate 1 and the steel plate belt 2 is easily sheared and damaged, and even the deformation of the skin plate 1 and the node structure is caused.
According to the temperature self-resetting node, the skin plate 1, the steel plate belt 2 and the bolt column 5 are fixedly connected into a whole, and the angle steel 6 is clamped between the steel plate belt 2 and the bolt cap 4 through the bolt cap 4, so that the angle steel 6 can slide relative to the whole formed by the bolt column 5, the steel plate belt 2 and the skin plate 1. And the shape memory alloy 3 is matched with the relative displacement of the angle steel 6, and the displacement of the angle steel 6 is limited within a proper range.
The temperature self-reset node changes the form of the node from a fixed node into the temperature self-reset node with the sliding groove 8 matched with the shape memory alloy 3, and when the structure of the skin plate 1 is changed under the condition of high temperature or low temperature, the external skin plate 1 can move along the sliding groove 8 of the node in a single direction. The smooth dislocation between the skin plate 1 and the inner steel frame 7 can be realized to provide a space for temperature deformation, and the deformation inconsistency is avoided to generate temperature stress or the deformation and the damage of the structure.
Specifically, the angle steel 6 is fixedly connected with the internal steel frame 7 through bolts, when the structure of the skin plate 1 is changed at high temperature or low temperature, the bolt columns 5 slide relatively in the sliding grooves 8, that is, the angle steel 6 slides relative to the steel plate strip 2, and through the relative sliding of the angle steel 6 relative to the steel plate strip 2, the temperature stress caused by inconsistent temperature deformation among the skin plate 1, the node structure and the internal steel frame 7 is avoided. Further, the shearing damage of the colloid between the skin plate 1 and the steel plate strip 2 is avoided, and the node structure is not deformed or damaged.
Considering that the structure is subject to wind loads and the like, it is not possible to put the structure in an unlimited deformation, it is necessary to limit the displacement between the skin panels 1 with respect to the internal steel frame 7.
Therefore, the shape memory alloy 3 is additionally arranged between the bolt column 5 and the angle steel 6, the structural shape of the shape memory alloy 3 under different temperature conditions is determined according to the deformation condition of the skin plate 1 under different temperature conditions, and the sliding displacement of the angle steel 6 relative to the bolt rod 5 and the skin plate 1 is limited to be in an appropriate size. When the temperature returns to the normal temperature, the shape memory alloy 3 also returns to the structural shape of the normal temperature state, and further drives the angle steel 6 to reset, so that the node structure returns to the normal temperature state, and the self-resetting function is realized.
Because the structural shape of the shape memory alloy 3 is only related to the temperature and is not influenced by wind load, the change of the distance between the angle steel 6 and the bolt column 5 can be always matched with the deformation of the external skin plate 1 in different temperature environments.
The temperature self-reset node of the invention enables the sliding distance of the angle steel 6 and the length change of the shape memory alloy 3 to be always matched with the temperature deformation of the skin plate 1, provides a buffer space for the temperature deformation difference of the skin plate 1 and the internal steel frame 7, and simultaneously prevents the skin plate 1 from losing the fastening connection with the internal steel frame 7 under the wind load condition.
Specifically, the shape memory alloy 3 is a cuboid strip-shaped structure, and two ends of the longest edge of the shape memory alloy 3 are respectively connected with the bolt rod 5 and the angle steel 6, so that the length is convenient to adjust, and the node self-resetting function is realized.
Specifically, when the ambient temperature exceeds the deformation temperature of the skin sheet 1, the length of the shape memory alloy 3 is 1.5 cm; when the ambient temperature is lower than the deformation temperature of the skin sheet 1, the length of the shape memory alloy 3 is 1 cm.
Specifically, because angle steel 6 is fixed on steel sheet area 2, simultaneously, again with inside steel framework 7 fixed connection, for the convenience of installation is fixed, angle steel 6 is the plate structure of bending, and the angle cooperation skin board 1 of specifically bending is decided for the angle of inside steel framework 7.
Specifically, one end of the angle steel 6, which is provided with the sliding groove 8, is tightly attached to the steel plate belt 2 and is clamped and fixed through the bolt cap 4, so that relative displacement between the angle steel 6 and the steel plate belt 2 is facilitated.
Specifically, the other end of the angle steel 6 is connected with the inner steel frame 7 by a bolt.
Specifically, the steel plate strip 2 is of a rectangular flat plate structure, and the outer side of the steel plate strip is bonded with the skin plate 1 through structural adhesive.
Specifically, the inner side of the steel plate strip 2 is connected with the bolt bar 5 by welding. The bolt shank 5 is screwed to the bolt cap 4.
Specifically, in order to ensure that the angle steel 6 of the temperature self-resetting node can smoothly slide relative to the steel plate strip 2 (or can enable the bolt rod 5 to slide in the sliding groove 8) and is stably fixed between the bolt cap 4 and the steel plate strip 2, the sliding groove 8 is a rectangular through hole, and the width of the sliding groove 8 is larger than the diameter of the bolt rod 5 and smaller than the diameter of the bolt cap 4.
In particular, the stress release and self-reset functions of the temperature self-reset node are realized conveniently through the sliding groove 8. The length of the sliding groove 8 is greater than the sum of the maximum length of the shape memory alloy 3 and the diameter of the bolt cap 4.
Compared with the prior art, the technical scheme provided by the embodiment has at least one of the following technical effects:
1. avoiding the shearing damage of the colloid. According to the temperature self-reset node, the form of the node is changed from a fixed node into the temperature self-reset node with the sliding groove matched with the shape memory alloy, and when the structure of the skin plate 1 is changed under the condition of high temperature or low temperature, the outer skin plate 1 can move in a single direction along the sliding groove of the node, so that stress release is realized. Smooth dislocation between the skin plate 1 and the inner steel frame 7 can be realized, and the phenomenon that the deformation is inconsistent to generate temperature stress to enable the colloid between the skin plate 1 and the steel plate belt 2 to be sheared and damaged is avoided.
2. Avoiding node deformation. According to the invention, the angle steel 6 is fixedly connected with the internal steel frame 7, and when the skin plate 1 deforms at a temperature, the temperature stress formed by inconsistent temperature deformation among the skin plate 1, the node structure and the internal steel frame is avoided through relative sliding of the angle steel 6 relative to the steel plate strip 2. Further, it is avoided that the node structure is not deformed or destroyed.
3. Temperature self-reset function. According to the invention, the shape memory alloy 3 is additionally arranged between the bolt column 5 and the angle steel 6, the structural shape of the shape memory alloy 3 under different temperature conditions is determined according to the deformation conditions of the skin plate 1 under different temperature conditions, and the sliding displacement of the angle steel 6 relative to the bolt rod 5 and the skin plate 1 is limited to be in a proper size. When the temperature returns to the normal temperature, the shape memory alloy 3 also returns to the structural shape of the normal temperature state, and further drives the angle steel 6 to reset, so that the node structure returns to the normal temperature state, and the self-resetting function is realized.
4. Is not affected by wind load. The temperature self-reset node of the invention enables the sliding distance of the angle steel 6 and the length change of the shape memory alloy 3 to be always matched with the temperature deformation of the skin plate 1, provides a buffer space for the temperature deformation difference of the skin plate 1 and the internal steel frame, and simultaneously prevents the skin plate 1 from losing the fastening connection with the internal steel frame under the wind load condition.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (8)
1. A self-resetting method for a frame-skin structure temperature self-resetting node is characterized by comprising the following steps:
s1, determining relative deformation displacement generated by inconsistent structural deformation of a skin plate (1) and an internal steel frame (7) under different temperature conditions;
s2, setting the structural shapes of the shape memory alloy (3) at different temperatures according to the deformation displacement of the skin plate (1) and the internal steel frame (7);
s3, connecting an internal steel frame (7) through angle steel (6), connecting a steel plate belt (2) with an external skin plate (1), welding a bolt rod (5) on the steel plate belt (2), and connecting the bolt rod (5) and the angle steel (6) through shape memory alloy (3); the angle steel (6) can slide relative to the steel plate strip (2), and the displacement range of the angle steel (6) is limited through the shape memory alloy (3);
s4, realizing the temperature stress release and self-reset functions of the nodes through the two-way memory function of the shape memory alloy (3);
in the step S4, when the ambient temperature is a certain temperature, the shape memory alloy (3) recovers the shape corresponding to the temperature, and at the same time, the angle steel (6) is driven to slide relative to the bolt bar (5) or the steel plate strip (2); the sliding displacement of the angle steel (6) is the same as the deformation displacement of the skin plate (1) relative to the internal steel frame (7), and the structural stress generated by inconsistent temperature deformation is released;
in the step S4, when the ambient temperature returns to the initial temperature, the shape memory alloy (3) also returns to the initial shape, and at the same time, the angle steel (6) is driven to return to the initial position, thereby realizing the self-resetting function.
2. The frame-skin structure temperature self-reset method of claim 1, wherein the temperature self-reset node comprises: the steel plate comprises a steel plate strip (2), shape memory alloy (3), a bolt cap (4), a bolt rod (5) and angle steel (6);
one side of the steel plate strip (2) is fixedly connected with the skin plate (1), and the other side of the steel plate strip is fixedly connected with the bolt rod (5);
the angle steel (6) is provided with a sliding groove (8), sleeved on the bolt rod (5) through the sliding groove (8) and fixed between the steel plate strip (2) and the bolt cap (4) through the bolt cap (4);
two ends of the shape memory alloy (3) are respectively and fixedly connected with the bolt rod (5) and the angle steel (6).
3. The self-resetting method of the frame-skin structure temperature self-resetting node according to claim 2, characterized in that the steel plate strip (2) is adhered to the skin plate (1) by structural glue.
4. The self-resetting method of a frame-skin structure temperature self-resetting node according to claim 3, characterized in that the bolt bar (5) is welded on the steel plate strip (2).
5. The self-resetting method of the temperature self-resetting node of the frame-skin structure according to claim 2, characterized in that the shape memory alloy (3) is a rectangular parallelepiped strip structure.
6. The self-resetting method of a frame-skin structure temperature self-resetting node according to claim 4, characterized in that the angle steel (6) is a bent plate structure; the angle steel (6) is connected with the internal steel frame (7) through bolts.
7. The frame-skin structure temperature self-resetting method of a node according to claim 4, characterized in that the sliding groove (8) is a rectangular through hole, and the width of the sliding groove (8) is larger than the diameter of the bolt shank (5) and smaller than the diameter of the bolt cap (4).
8. The self-resetting method of a frame-skin structure temperature self-resetting node according to claim 4, characterized in that the length of the sliding groove (8) is greater than the sum of the maximum length of the shape memory alloy (3) and the diameter of the bolt cap (4).
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| CN103821265A (en) * | 2014-02-28 | 2014-05-28 | 北京建筑大学 | Self-resetting energy dissipation node for externally hung aerated concrete wallboard and construction method thereof |
| CN206971804U (en) * | 2017-05-09 | 2018-02-06 | 西安建筑科技大学 | A kind of ouble bar link is hinged automatic runback device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201334727Y (en) * | 2008-12-02 | 2009-10-28 | 中冶东方工程技术有限公司 | Plant framework |
| JP2012002009A (en) * | 2010-06-18 | 2012-01-05 | Shimizu Corp | Sealing device for tunnel boring machine and tunnel boring machine equipped with the same |
| CN103821265A (en) * | 2014-02-28 | 2014-05-28 | 北京建筑大学 | Self-resetting energy dissipation node for externally hung aerated concrete wallboard and construction method thereof |
| CN206971804U (en) * | 2017-05-09 | 2018-02-06 | 西安建筑科技大学 | A kind of ouble bar link is hinged automatic runback device |
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