CN210032335U - Adopt trompil steel sheet to strengthen UHPC-NC interface bonding's device - Google Patents
Adopt trompil steel sheet to strengthen UHPC-NC interface bonding's device Download PDFInfo
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- CN210032335U CN210032335U CN201920517112.2U CN201920517112U CN210032335U CN 210032335 U CN210032335 U CN 210032335U CN 201920517112 U CN201920517112 U CN 201920517112U CN 210032335 U CN210032335 U CN 210032335U
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Abstract
The utility model belongs to the technical field of structural engineering, concretely relates to adopt trompil steel sheet to strengthen device that UHPC-NC interface bonds. Firstly, selecting a high-quality steel plate as a raw material of the connecting piece, and then manufacturing an open pore steel plate (3) as the connecting piece. When a UHPC-NC superposed beam is poured, 20-30 cm of UHPC (1) is poured, when the lower part of UHPC (1) is not completely solidified, two rows of perforated steel plates (3) are inserted along the length direction of the beam, the length of each perforated steel plate (3) is 10-20 cm shorter than that of the beam, the transverse distance between the two rows of perforated steel plates is 1/3-1/2 of the width of the superposed beam, and the insertion depth is half of the depth of each perforated steel plate (3). And when the UHPC (1) at the lower part is completely solidified, pouring the NC (2) at the upper part to form a superposed beam, and finally maintaining the UHPC-NC superposed beam. The utility model discloses in through insert trompil steel sheet (3) between UHPC-NC connection interface, improved the cohesive strength at UHPC-NC interface, be favorable to the collaborative work of two kinds of materials of UHPC-NC superposed beam, the good characteristic of full play UHPC-NC superposed beam.
Description
Technical Field
The utility model belongs to the technical field of structural engineering, concretely relates to adopt trompil steel sheet to strengthen UHPC-NC (Ultra-High Performance Concrete and Normal Concrete, Ultra-High Performance Concrete is called UHPC for short, Normal Concrete is called NC for short) interface bonding's device.
Background
Concrete structures have very wide application, and the first concrete building Martin Tang built in China at the university of Zhongshan in Guangzhou in 1906 has been for over one hundred years. Due to the influence of physical, chemical and human factors, the damage of various concrete structures to different degrees becomes more obvious as time goes on. Under the influence of the factors, the structure has diseases such as breakage, cracking, exposed ribs, deformation and the like, and the safety and the durability of the structure are seriously influenced.
The ultra-high performance concrete, referred to as UHPC for short, has ultra-high durability and ultra-high mechanical properties, so that the ultra-high performance concrete becomes a research hotspot in the field of civil engineering, particularly in the technical field of structural engineering. UHPC can be said to be the best engineering material of durability at present stage, if the arrangement of reinforcement is suitable, its mechanical properties can infinitely approach steel construction, very big improvement structure's life. Furthermore, UHPC has excellent wear resistance, excellent corrosion resistance, excellent antiknock properties, and the like. However, the materials for UHPC are currently too expensive to be used on a large scale. Therefore, the UHPC and NC overlay method is currently widely used in the field of structural engineering. Therefore, the excellent tensile property of UHPC can be fully exerted, the stronger compression resistance of NC is utilized, and a certain economic effect is achieved.
In order to ensure the effective bonding of the UHPC-NC interface, treatment modes such as roughening and grooving on a connecting surface are adopted at present, the mode causes the UHPC to generate micro cracks, the bonding strength of the UHPC-NC interface cannot be ensured to be enough, and when a UHPC-NC superposed beam bears a large load, a bonding surface is easy to generate shearing damage.
SUMMERY OF THE UTILITY MODEL
The utility model relates to an adopt trompil steel sheet to strengthen device that UHPC-NC interface bonded at first selects high-quality steel sheet as connecting piece raw and other materials, then regards this preparation trompil steel sheet as the connecting piece. When the UHPC-NC superposed beam is poured, pouring 20-30 cm UHPC, inserting two rows of perforated steel plates along the length direction of the beam when the lower part UHPC is not completely solidified, pouring the upper NC to form the superposed beam when the lower part UHPC is completely solidified, and finally curing the UHPC-NC superposed beam. The utility model discloses in through insert the trompil steel sheet between UHPC-NC connection interface, improved the cohesive strength at UHPC-NC interface, be favorable to the collaborative work of two kinds of materials of UHPC-NC superposed beam, the good characteristic of full play UHPC-NC superposed beam. The problem of insufficient adhesion of the existing UHPC-NC interface is solved, and the mechanical property of the UHPC-NC superposed beam can be better researched.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a device for strengthening UHPC-NC interface bonding by adopting perforated steel plates is characterized in that the perforated steel plates are manufactured to be used as connecting pieces between the UHPC and the NC interface, the height of each steel plate is set to be 8-12 cm, holes are formed in the axis of each steel plate in the length direction, the hole diameter is half of the height of the steel plate, the distance between the edge of the hole diameter and the edge of the steel plate is not less than 2cm, the length of the steel plate is 10-20 cm smaller than the length of a beam, and the thickness of a concrete protective layer between the longitudinal edge of the steel plate and the edge of the.
The device for strengthening UHPC-NC interface bonding by adopting the perforated steel plate is characterized in that the perforated steel plate is made of high-quality high-strength alloy steel.
The device for strengthening UHPC-NC interface bonding by adopting the perforated steel plate is characterized in that the distance between every two holes of the perforated steel plate is 5-10 cm.
The device for strengthening UHPC-NC interface bonding by adopting the perforated steel plates is provided with two rows of perforated steel plates, wherein the transverse distance between the two rows of perforated steel plates is 1/3-1/2 of the width of a beam.
The device for strengthening UHPC-NC interface bonding by adopting the perforated steel plate has the advantages that the perforated shape of the perforated steel plate can be one of circular, oval, square, rectangular, rhombic and pentagonal.
According to the device for reinforcing UHPC-NC interface bonding by adopting the perforated steel plates, when UHPC is not condensed, two rows of perforated steel plates are vertically inserted in the length direction of a beam, the height of each perforated steel plate is vertical to the horizontal plane of the poured UHPC, the insertion depth is half of the height of each perforated steel plate, the two rows of steel plates are parallel to each other, and the positions of the holes are in one-to-one correspondence.
The utility model discloses following beneficial effect has:
the utility model relates to an adopt trompil steel sheet to strengthen device that UHPC-NC interface bonded, for guaranteeing the effective bonding at UHPC-NC interface, adopt at present connecting processing modes such as face chisel hair, grooving, this kind of mode causes UHPC to produce the microcrack, also can't guarantee to do enough UHPC-NC interface bonding strength, when UHPC-NC superposed beam bears great load, easily causes the faying face to produce and cuts the destruction. The utility model discloses a set up the trompil steel sheet at UHPC-NC interface, changed past bonding mode, also do not destroy original concrete structure. Meanwhile, the perforated steel plate and the concrete are poured together, so that the perforated steel plate can be well connected with the concrete to work together. The problem of insufficient adhesion of the existing UHPC-NC interface is solved, and the mechanical property of the UHPC-NC superposed beam can be better researched.
Drawings
FIG. 1 is a schematic longitudinal cross-sectional profile of a UHPC-NC composite beam cast using open-hole steel plates;
fig. 2 is a cross-sectional view schematically illustrating a UHPC-NC composite beam cast using an open-hole steel plate.
In the drawings, 1 is UHPC; 2 is NC; and 3, perforated steel plates.
Detailed Description
In order to understand the technical features, objects, and effects of the present invention more deeply, the present invention will now be described with reference to the accompanying drawings.
A device for strengthening UHPC-NC interface bonding by adopting perforated steel plates is characterized in that the perforated steel plate 3 is manufactured to be used as a connecting piece between the UHPC1 interface and the NC1 interface, the height of each steel plate is set to be 8 cm-12 cm, holes are formed in the axis of each steel plate in the length direction, the hole diameter is half of the height of the steel plate, the distance between the edge of the hole diameter and the edge of the steel plate is not less than 2cm, the length of the steel plate is 10 cm-20 cm smaller than the length of a beam, and the thickness of a concrete protective layer between the longitudinal edge of the steel plate and.
According to the device for strengthening the UHPC-NC interface bonding by adopting the perforated steel plate, the perforated steel plate 3 is made of high-quality high-strength alloy steel.
The device for strengthening UHPC-NC interface bonding by adopting the perforated steel plate is characterized in that the distance between every two holes of the perforated steel plate 3 is 5 cm-10 cm.
The device for strengthening UHPC-NC interface bonding by adopting the perforated steel plates is provided with two rows of perforated steel plates 3, and the transverse distance between the two rows of perforated steel plates 3 is 1/3-1/2 of the width of a beam.
According to the device for strengthening UHPC-NC interface bonding by adopting the perforated steel plate, the perforated shape of the perforated steel plate 3 can be one of a circle, an ellipse, a square, a rectangle, a diamond and a pentagon.
According to the device for reinforcing UHPC-NC interface bonding by adopting the perforated steel plates, when UHPC1 is not condensed, two rows of perforated steel plates 3 are vertically inserted in the length direction of a beam, the height of each perforated steel plate 3 is vertical to the horizontal plane of UHPC1 poured, the insertion depth is half of the height of each perforated steel plate 3, the two rows of steel plates are parallel to each other, and the positions of the holes are in one-to-one correspondence.
The device for strengthening UHPC-NC interface bonding by adopting the perforated steel plate comprises the following specific using mode:
A. determining the length of the perforated steel plate 3 according to the length of the manufactured UHPC-NC superposed beam;
B. setting a template, and pouring 20-30 cm UHPC 1;
C. when the lower part UHPC1 is not condensed, the perforated steel plate 3 of the connecting piece is inserted into the lower part UHPC1 which is not condensed according to the requirement;
D. and after the UHPC1 on the lower part is solidified and hardened, pouring the NC2 on the upper part to form the superposed beam, and curing the UHPC-NC superposed beam.
Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The device for reinforcing UHPC-NC interface bonding by adopting the perforated steel plate is characterized in that the perforated steel plate (3) is manufactured to be used as a connecting piece between the UHPC (1) and the NC (2) interface, the height of each steel plate is set to be 8 cm-12 cm, a hole is formed in the axis of each steel plate in the length direction, the aperture is half of the height of the steel plate, the distance between the edge of the aperture and the edge of the steel plate is not less than 2cm, the length of the steel plate is 10 cm-20 cm smaller than the length of a beam, and the thickness of the concrete protective layer between the longitudinal edge of the steel plate and the edge of the beam.
2. The device for strengthening UHPC-NC interface bonding by using the open-hole steel plate as claimed in claim 1, characterized in that the open-hole steel plate (3) is made of high-quality high-strength alloy steel.
3. A device for strengthening UHPC-NC interfacial bonding using perforated steel sheets according to claim 1, characterized in that the perforated steel sheets (3) have a pitch of 5cm to 10cm per hole.
4. The device for strengthening UHPC-NC interfacial bonding by using the perforated steel plate as claimed in claim 1, characterized in that two rows of perforated steel plates (3) are provided, and the transverse spacing between the two rows of perforated steel plates (3) is 1/3-1/2 of the beam width.
5. A device for UHPC-NC interface bonding using perforated steel sheet according to claim 1 characterized in that the perforated shape of the perforated steel sheet (3) can be one of circular, oval, square, rectangular, diamond, pentagonal.
6. The device for strengthening UHPC-NC interface bonding by using the perforated steel plates is characterized in that two rows of perforated steel plates (3) are vertically inserted in the length direction of the beam when the lower part UHPC (1) is not condensed, the height of the perforated steel plates (3) is vertical to the horizontal plane of the poured lower part UHPC (1), the insertion depth is half of the height of the perforated steel plates (3), the two rows of steel plates are parallel to each other, and the perforating positions correspond to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920517112.2U CN210032335U (en) | 2019-04-16 | 2019-04-16 | Adopt trompil steel sheet to strengthen UHPC-NC interface bonding's device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920517112.2U CN210032335U (en) | 2019-04-16 | 2019-04-16 | Adopt trompil steel sheet to strengthen UHPC-NC interface bonding's device |
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| Publication Number | Publication Date |
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| CN210032335U true CN210032335U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920517112.2U Expired - Fee Related CN210032335U (en) | 2019-04-16 | 2019-04-16 | Adopt trompil steel sheet to strengthen UHPC-NC interface bonding's device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111424525A (en) * | 2020-03-31 | 2020-07-17 | 成都市路桥经营管理有限责任公司 | Large-span superposed beam of high-speed railway and construction method thereof |
-
2019
- 2019-04-16 CN CN201920517112.2U patent/CN210032335U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111424525A (en) * | 2020-03-31 | 2020-07-17 | 成都市路桥经营管理有限责任公司 | Large-span superposed beam of high-speed railway and construction method thereof |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Qingrui Concrete Construction Engineering Co.,Ltd. Assignor: NANJING FORESTRY University Contract record no.: X2020980002969 Denomination of utility model: Device for reinforcing UHPC-NC interface bonding by adopting perforated steel plate Granted publication date: 20200207 License type: Common License Record date: 20200611 |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Nanjing daocolt Information Technology Co., Ltd Assignor: NANJING FORESTRY University Contract record no.: X2020980007798 Denomination of utility model: A device for strengthening uhpc-nc interface bonding with perforated steel plate Granted publication date: 20200207 License type: Common License Record date: 20201112 |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: JIANGSU POLAR STAR TRAFFIC INDUSTRY GROUP Co.,Ltd. Assignor: NANJING FORESTRY University Contract record no.: X2020980008250 Denomination of utility model: A device for strengthening uhpc-nc interface bonding with perforated steel plate Granted publication date: 20200207 License type: Common License Record date: 20201119 |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200207 Termination date: 20210416 |
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| CF01 | Termination of patent right due to non-payment of annual fee |