CN109138154B - Node connection method for fabric concrete prefabricated part - Google Patents
Node connection method for fabric concrete prefabricated part Download PDFInfo
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- CN109138154B CN109138154B CN201811218673.9A CN201811218673A CN109138154B CN 109138154 B CN109138154 B CN 109138154B CN 201811218673 A CN201811218673 A CN 201811218673A CN 109138154 B CN109138154 B CN 109138154B
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- 239000004744 fabric Substances 0.000 title claims abstract description 108
- 239000004567 concrete Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000004873 anchoring Methods 0.000 claims description 16
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000011265 semifinished product Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 239000000835 fiber Substances 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 238000009415 formwork Methods 0.000 description 5
- 239000011150 reinforced concrete Substances 0.000 description 5
- 210000002310 elbow joint Anatomy 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920002748 Basalt fiber Polymers 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The invention discloses a method for connecting nodes of fabric concrete prefabricated parts, which adopts the connection of the fabric concrete prefabricated parts and joint firmware as follows: and reserving positioning grooves in the end parts of the fabric concrete prefabricated parts to be connected in the production process, and inserting the positioning plates connected with the end parts of the fixing parts into the positioning grooves to realize connection. The invention has the advantages of firm and convenient connection and good performance.
Description
Technical Field
The invention relates to a method for connecting nodes of fabric concrete prefabricated parts.
Background
The traditional reinforced concrete material in the civil engineering structure often has steel bar corrosion, greatly reduces the interface bonding performance between the steel bars and the concrete, weakens the interface performance between the concrete and the steel bars, and influences the durability of the structure to a great extent. In particular, the generation of micro-cracks leads the steam and the water in the air to be directly contacted with the carbon dioxide in the atmosphere, thus accelerating the corrosion of the steel bar material and sometimes seriously improving the safety of the structure.
With the development and application of new materials, the development of fabric reinforced concrete by means of advanced textile technology is rapid. The fiber fabric reinforcing structure can arrange the yarn reinforcing direction according to the design requirement, and has great flexibility. The reinforcing effect of the fiber woven mesh is better than that of the chopped fiber, and the problem that the chopped fiber is difficult to disperse in the matrix can be avoided. The reinforcing effect of the fabric is obviously higher than that of chopped fibers, and the fabric can replace certain stressed steel bars under special use conditions.
In recent years, compared with basalt fiber and carbon fiber fabrics, the alkali-resistant glass fabric has wide sources and low price. The fabric material has stronger alkali resistance, better durability and corrosion resistance than the reinforcing steel bar, does not need to consider the thickness of a protective layer and the like, so a fiber fabric thin-wall structure of about 10mm appears, and the dead weight of the structure is greatly reduced. The fabric concrete has flexible manufacturing process, higher bearing capacity of components, good durability and fatigue resistance, greatly widens the application range of the concrete composite material, and is a great transformation of the history of cement-based composite materials.
However, many years of research and application are mainly limited to various single components of fabric concrete, and are rarely related to the connection problem of the components, and methods and measures for treating nodes when different components are connected are lacked. Although the tension of a single fabric in a fabric concrete member is far lower than that of a single steel bar in a reinforced concrete member, the fiber fabric is thin and does not have good rigidity of the steel bar, so that a certain shape cannot be easily maintained at a node point like the steel bar. If the concrete is poured according to the direct formwork support of the node of the common concrete member, the fabric is very easy to deviate from the due position seriously, the overlapping length and the anchoring effect of the fabric are difficult to control, and the reliability of the node is ensured.
Disclosure of Invention
The invention aims to provide a method for connecting fabric concrete prefabricated part nodes, which is firm and convenient to connect and has good performance.
The technical solution of the invention is as follows:
a method for connecting fabric concrete prefabricated part nodes is characterized in that: adopting a fabric concrete prefabricated part to connect with the joint firmware: reserving positioning grooves in the end parts of the fabric concrete prefabricated parts to be connected in the production process, and inserting the positioning plates connected with the end parts of the firmware into the positioning grooves to realize connection;
the joint firmware comprises a supporting plate, a plurality of anchor guide plates are sequentially distributed along the length direction of the supporting plate, and the upper half part and the lower half part of each anchor guide plate are respectively distributed on the upper side and the lower side of the supporting plate; the anchor guiding plates are uniformly distributed with anchor guiding holes penetrating through the fabric, and the anchor guiding hole of at least one anchor guiding plate is internally provided with an anchoring component for fastening the fabric; the strip-shaped fabric at least penetrates through two adjacent anchor guide plates and has certain pretension; the anchoring assembly comprises a tightening ring in threaded connection with the anchor guiding hole, and an inner hole of the tightening ring is in a taper hole form with a small front end and a large rear end; the fastening ring is plugged in an inner hole of the adjusting ring, the outer surface of the fastening ring is matched with the inner hole of the adjusting ring, the inner hole of the fastening ring is in a front conical shape and a rear cylindrical shape, and the inner wall of the rear cylindrical part is provided with internal threads; the tapered clamping block is plugged in an inner hole of the fastening ring, the outer surface of the tapered clamping block is matched with the inner hole of the fastening ring, the tapered clamping block is formed by movably splicing a plurality of sections, the center of the movably spliced sections is a central hole penetrating through the fabric, and the diameter of the central hole is smaller than the outer diameter of the fabric so as to clamp the fabric; a guide protection cover is arranged behind the conical clamping block, external threads matched with the internal threads on the fastening ring are arranged on the peripheral surface of the guide protection cover, and the fastening of the fabric is realized by adjusting the screwing-in depth of the guide protection cover; and placing a template on the semi-finished product of the joint firmware with the fabric, pouring concrete, and removing the template after the design strength is reached to form the joint firmware for connecting the fabric concrete prefabricated part.
The guide anchor plate comprises five guide anchor plates, namely a first guide anchor plate, a second guide anchor plate, a third guide anchor plate, a fourth guide anchor plate and a fifth guide anchor plate from left to right; the fabric at the left end enters from the anchor guiding hole on the first anchor guiding plate and passes through the anchor guiding holes on the second, third and fourth anchor guiding plates; the fabric at the right end enters from the anchor guiding hole on the fifth anchor guiding plate and passes through the anchor guiding holes on the fourth, third and second anchor guiding plates; and an anchoring assembly is arranged in the anchor guiding hole of the second anchor guiding plate and the anchor guiding hole of the fourth anchor guiding plate.
A pouring groove is formed in the supporting plate, and part of fabric, coming out of one anchor guide plate, on the upper portion of the supporting plate penetrates through the pouring groove to enter the lower portion of the supporting plate and enter the adjacent anchor guide plate.
The guide anchor plate comprises four guide anchor plates, namely a first guide anchor plate, a second guide anchor plate, a third guide anchor plate and a fourth guide anchor plate from left to right; the fabric at the left end enters from the anchor guiding hole on the first anchor guiding plate and passes through the anchor guiding holes on the second anchor guiding plate and the third anchor guiding plate; the fabric at the right end enters from the anchor guiding hole on the fourth anchor guiding plate and passes through the anchor guiding holes on the fourth anchor guiding plate and the third anchor guiding plate; and an anchoring assembly is arranged in the anchor guiding holes of the second anchor guiding plate and the third anchor guiding plate.
The guide anchor plate comprises five guide anchor plates, namely a first guide anchor plate, a second guide anchor plate, a third guide anchor plate, a fourth guide anchor plate and a fifth guide anchor plate from left to right; the fabric at the left end enters from the anchor guiding hole on the first anchor guiding plate and passes through the anchor guiding hole on the second anchor guiding plate; the fabric at the right end enters from the anchor guiding hole on the fifth anchor guiding plate and passes through the anchor guiding hole on the fourth anchor guiding plate; arranging an anchoring component in the anchor guiding holes of the second anchor guiding plate and the fourth anchor guiding plate; the supporting plate is in a bending form.
The invention has the advantages that: fabric concrete is currently mainly at the level of a single element, and there is a lack of treatment and measures for the joint joints of elements, especially for fabric precast concrete elements. Because the fiber fabric is thin and does not have good rigidity of the steel bars, the fiber fabric can not easily keep a certain shape at the node position like the steel bars in the traditional reinforced concrete. If the concrete is directly cast according to the node of the common concrete member, the fabric is very easy to deviate from the required position seriously, and the lapping and anchoring lengths of the fabric and the reliability of the node are difficult to control. However, the tension force possibly existing in a single fabric in the fabric concrete prefabricated part is far lower than that of a single steel bar in the reinforced concrete member, and the possibility of solving the problem in a limited space in a node is provided. The invention provides a joint firmware, which solves the problems of positioning, lapping and anchoring of low-rigidity fabrics in a narrow node space, can purposefully design the internal force of the fabrics in a concrete node according to needs, optimizes the internal force state of the node, meets the requirements of different types of nodes, and has firm and convenient connection and good performance.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a schematic view of a fabric concrete knuckle.
Fig. 2 is a schematic view of a fabric concrete straight node.
Fig. 3 is a schematic view of an anchor assembly.
Fig. 4 is a schematic view of the anchor device in a row.
Fig. 5 is a schematic view of a fabric concrete precast element.
Fig. 6 is a schematic view of a fiber-less splice fastener.
FIG. 7 is a schematic view of the joint fastener when the fabric is anchored.
Fig. 8 is a schematic view of a tightening ring.
Figure 9 is a schematic view of a fastening ring.
FIG. 10 is a schematic view of a tapered clamp block.
Fig. 11 is a schematic view of the guard cover.
Fig. 12 is a schematic diagram of a fabric concrete knuckle formwork panel to be cast.
FIG. 13 is a schematic view of the upper 60% fiber fabric of the support plate anchored to the lower anchor guide plate engagement fixture 4 of the support plate.
FIG. 14 is a schematic view of the linear fastener when the fabric is anchored.
Fig. 15 is a schematic diagram of a fabric concrete straight node formwork ready for casting.
Figure 16 is a schematic view of the weak bend nodal fiber fabric in the joint fastener arrangement.
Figure number notes
1-a fabric concrete prefabricated part; 2, template; 3-a fabric; 4-joining the firmware; 5, tightening the ring; 6, a fastening ring; 7-a conical clamping block; 8, a guide protective cover; 9-concrete poured in the node area; 10-a support plate; 11-anchor guiding plate; 12-a positioning plate; 13-positioning groove.
Detailed Description
Example 1: elbow joint connection method with certain rigidity
A fabric concrete prefabricated part node connecting method adopts a fabric concrete prefabricated part and a joint fastener to connect: reserving positioning grooves in the end parts of the fabric concrete prefabricated parts to be connected in the production process, and inserting the positioning plates connected with the end parts of the firmware into the positioning grooves to realize connection;
the joint firmware comprises a supporting plate, a plurality of anchor guide plates are sequentially distributed along the length direction of the supporting plate, and the upper half part and the lower half part of each anchor guide plate are respectively distributed on the upper side and the lower side of the supporting plate; the anchor guiding plates are uniformly distributed with anchor guiding holes penetrating through the fabric, and the anchor guiding hole of at least one anchor guiding plate is internally provided with an anchoring component for fastening the fabric; the strip-shaped fabric at least passes through two adjacent anchor guide plates and has certain pretension (for example: pretension which gives 15% of ultimate bearing capacity to each fabric); the anchoring assembly comprises a tightening ring in threaded connection with the anchor guiding hole, and an inner hole of the tightening ring is in a taper hole form with a small front end and a large rear end; the fastening ring is plugged in an inner hole of the adjusting ring, the outer surface of the fastening ring is matched with the inner hole of the adjusting ring, the inner hole of the fastening ring is in a front conical shape and a rear cylindrical shape, and the inner wall of the rear cylindrical part is provided with internal threads; the tapered clamping block is plugged in an inner hole of the fastening ring, the outer surface of the tapered clamping block is matched with the inner hole of the fastening ring, the tapered clamping block is formed by movably splicing a plurality of sections, the center of the movably spliced sections is a central hole penetrating through the fabric, and the diameter of the central hole is smaller than the outer diameter of the fabric so as to clamp the fabric; a fabric passing hole is formed in the center of the guide and protection cover, external threads matched with the internal threads on the fastening ring are arranged on the peripheral surface of the guide and protection cover, and the fastening of the fabric is realized by adjusting the screwing-in depth of the guide and protection cover; and placing a template on the semi-finished product of the joint firmware with the fabric, pouring concrete, and removing the template after the design strength is reached to form the joint firmware for connecting the fabric concrete prefabricated part.
The guide anchor plate comprises five guide anchor plates, namely a first guide anchor plate, a second guide anchor plate, a third guide anchor plate, a fourth guide anchor plate and a fifth guide anchor plate from left to right; the fabric at the left end enters from the anchor guiding hole on the first anchor guiding plate and passes through the anchor guiding holes on the second, third and fourth anchor guiding plates; the fabric at the right end enters from the anchor guiding hole on the fifth anchor guiding plate and passes through the anchor guiding holes on the fourth, third and second anchor guiding plates; and an anchoring assembly is arranged in the anchor guiding hole of the second anchor guiding plate and the anchor guiding hole of the fourth anchor guiding plate.
The application of the pre-tensioning force to the fabric can be applied by means of an external pulling device, also rotating the holes in the tightening ring 5, by mechanically moving the tightening ring by means of a screw.
Example 2: node connection method for bearing vertical static downward load
The distribution design of the fabric: by taking the support plate of the joint fastener 4 as a middle reference position, 60% of the fabric on the upper part of the support plate is guided to the anchor guiding plate on the lower part of the support plate through the pouring groove on the support plate to be lapped and anchored, so that the tensile and anti-cracking performance of the fabric concrete on the lower part is enhanced. The rest is the same as example 1.
Example 3: linear type node connection method with certain rigidity
The joint fastener 4 is in the form of a straight line, and the intermediate anchor guiding plate 3 may be omitted as shown in fig. 14. The rest is the same as example 1.
Example 4: weak elbow joint connection method
The intermediate support plate of the joint fixture 4 may be suitably thinned to weaken the rigidity.
The fiber fabric is only properly and slightly tightened, the fabric on each side does not pass through the middle anchor guiding plate 3, but only passes through the anchor guiding plates 1, 2 and 4, 5 respectively, and the middle part of the combined fastener is not overlapped by the fabric; the weak elbow joint is formed after formwork supporting and formwork stripping, and the weak elbow joint is designed to be firstly damaged under the reciprocating load action of earthquake and the like. The rest is the same as example 1.
Claims (5)
1. A method for connecting fabric concrete prefabricated part nodes is characterized in that: adopting a fabric concrete prefabricated part to connect with the joint firmware: reserving positioning grooves in the end parts of the fabric concrete prefabricated parts to be connected in the production process, and inserting the positioning plates connected with the end parts of the firmware into the positioning grooves to realize connection;
the joint firmware comprises a supporting plate, a plurality of anchor guide plates are sequentially distributed along the length direction of the supporting plate, and the upper half part and the lower half part of each anchor guide plate are respectively distributed on the upper side and the lower side of the supporting plate; the anchor guiding plates are uniformly distributed with anchor guiding holes penetrating through the fabric, and the anchor guiding hole of at least one anchor guiding plate is internally provided with an anchoring component for fastening the fabric; the strip-shaped fabric at least penetrates through two adjacent anchor guide plates and has certain pretension; the anchoring assembly comprises a tightening ring in threaded connection with the anchor guiding hole, and an inner hole of the tightening ring is in a taper hole form with a small front end and a large rear end; the fastening ring is plugged in an inner hole of the adjusting ring, the outer surface of the fastening ring is matched with the inner hole of the adjusting ring, the inner hole of the fastening ring is in a front conical shape and a rear cylindrical shape, and the inner wall of the rear cylindrical part is provided with internal threads; the tapered clamping block is plugged in an inner hole of the fastening ring, the outer surface of the tapered clamping block is matched with the inner hole of the fastening ring, the tapered clamping block is formed by movably splicing a plurality of sections, the center of the movably spliced sections is a central hole penetrating through the fabric, and the diameter of the central hole is smaller than the outer diameter of the fabric so as to clamp the fabric; a guide protection cover is arranged behind the conical clamping block, external threads matched with the internal threads on the fastening ring are arranged on the peripheral surface of the guide protection cover, and the fastening of the fabric is realized by adjusting the screwing-in depth of the guide protection cover; and placing a template on the semi-finished product of the joint firmware with the fabric, pouring concrete, and removing the template after the design strength is reached to form the joint firmware for connecting the fabric concrete prefabricated part.
2. The method for connecting the nodes of the fabric concrete prefabricated parts according to claim 1, wherein the method comprises the following steps: the guide anchor plate comprises five guide anchor plates, namely a first guide anchor plate, a second guide anchor plate, a third guide anchor plate, a fourth guide anchor plate and a fifth guide anchor plate from left to right; the fabric at the left end enters from the anchor guiding hole on the first anchor guiding plate and passes through the anchor guiding holes on the second, third and fourth anchor guiding plates; the fabric at the right end enters from the anchor guiding hole on the fifth anchor guiding plate and passes through the anchor guiding holes on the fourth, third and second anchor guiding plates; and an anchoring assembly is arranged in the anchor guiding hole of the second anchor guiding plate and the anchor guiding hole of the fourth anchor guiding plate.
3. The method for connecting the nodes of the fabric concrete prefabricated parts according to claim 2, wherein the method comprises the following steps: a pouring groove is formed in the supporting plate, and part of fabric, coming out of one anchor guide plate, on the upper portion of the supporting plate penetrates through the pouring groove to enter the lower portion of the supporting plate and enter the adjacent anchor guide plate.
4. The method for connecting the nodes of the fabric concrete prefabricated parts according to claim 1, wherein the method comprises the following steps: the guide anchor plate comprises four guide anchor plates, namely a first guide anchor plate, a second guide anchor plate, a third guide anchor plate and a fourth guide anchor plate from left to right; the fabric at the left end enters from the anchor guiding hole on the first anchor guiding plate and passes through the anchor guiding holes on the second anchor guiding plate and the third anchor guiding plate; the fabric at the right end enters from the anchor guiding hole on the fourth anchor guiding plate and passes through the anchor guiding holes on the fourth anchor guiding plate and the third anchor guiding plate; and an anchoring assembly is arranged in the anchor guiding holes of the second anchor guiding plate and the third anchor guiding plate.
5. The method for connecting the nodes of the fabric concrete prefabricated parts according to claim 1, wherein the method comprises the following steps: the guide anchor plate comprises five guide anchor plates, namely a first guide anchor plate, a second guide anchor plate, a third guide anchor plate, a fourth guide anchor plate and a fifth guide anchor plate from left to right; the fabric at the left end enters from the anchor guiding hole on the first anchor guiding plate and passes through the anchor guiding hole on the second anchor guiding plate; the fabric at the right end enters from the anchor guiding hole on the fifth anchor guiding plate and passes through the anchor guiding hole on the fourth anchor guiding plate; arranging an anchoring component in the anchor guiding holes of the second anchor guiding plate and the fourth anchor guiding plate; the supporting plate is in a bending form.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811218673.9A CN109138154B (en) | 2018-10-19 | 2018-10-19 | Node connection method for fabric concrete prefabricated part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811218673.9A CN109138154B (en) | 2018-10-19 | 2018-10-19 | Node connection method for fabric concrete prefabricated part |
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| CN109138154B true CN109138154B (en) | 2020-05-12 |
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| JPH08277584A (en) * | 1995-04-07 | 1996-10-22 | Toru Kajita | Reinforced continuous footing with under floor ventilating hole |
| CN101476390A (en) * | 2008-12-29 | 2009-07-08 | 大连阿尔滨集团有限公司 | Large-template drawing steel stranded wire |
| CN102808465B (en) * | 2012-08-08 | 2014-07-09 | 沈阳建筑大学 | Assembly connecting structure and assembly connecting method of assembled concrete frame and shear wall combination |
| CN203361345U (en) * | 2013-07-08 | 2013-12-25 | 同济大学 | Rubber ring perforated plate recombination connecting piece |
| CN206752675U (en) * | 2017-04-26 | 2017-12-15 | 北京建筑大学 | A kind of concrete frame node |
| CN108035255B (en) * | 2017-12-26 | 2024-03-01 | 浙锚科技股份有限公司 | Carbon fiber stay cable system |
| CN207904700U (en) * | 2018-01-31 | 2018-09-25 | 广州大学 | A kind of prestressing force conductive concrete structures |
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Effective date of registration: 20230105 Address after: No. 1, Yanjiang Road, Dantu District, Zhenjiang City, Jiangsu Province, 212000 Patentee after: Jiangsu Zhenjiang Sijian Construction Group Co.,Ltd. Address before: 226019 Jiangsu city of Nantong province sik Road No. 9 Patentee before: NANTONG University |
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