UHPC-RC laminated slab interface connecting piece
By installing open-hole slot steel and high-strength bolts through the UHPC-RC overlapping board interface, the problem of poor durability and lattice resistance of the RC structure and poor cracking resistance is solved, and the mechanical performance and the mechanical properties and of the UHPC-RC overlapping board are improved. Carrier capacity.
Patent Information
- Application Number
- CN202310923047.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-25
- Publication Date
- 2025-01-28
AI Technical Summary
The RC structure has disadvantages in terms of large structural self-weight, poor durability, and poor crack resistance. Under the influence of material characteristics and curing conditions, the full structure internal force of the component directly affects the crack resistance and ultimate bearing capacity. The combined interface is the weak link in the structure's stress.
UHPC-RC overlap interface connector is used, including open-hole groove steel, penetrating steel bars and high-strength bolts. By exciting grooves and installing connectors at the UHPC-RC overlap plate interface, the strength and mechanical performance of the UHPC-RC overlap plate are improved Essence
Improve the bearing capacity, crack resistance and mechanical properties of the UHPC-RC overlap plate, ensure the adhesion between the UHPC concrete plate and the RC concrete board, and ensure the strength, stiffness and stability of the combined structure.
Smart Images
Figure CN119372996A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a UHPC-RC laminated plate interface connector Background Art
[0002] RC structures have disadvantages such as heavy weight, poor durability, and poor crack resistance. UHPC-RC composite panels make full use of UHPC as a new type of cement-based composite material with high strength, high toughness, and high volume stability, which not only improves the durability of components, but also improves the ultimate bearing capacity of composite components. When RC and UHPC are well bonded, due to the differences in material properties, different curing conditions, and the interface conditions between new and old concrete, the structural internal forces of the components are fully distributed, which directly affects the crack resistance and ultimate bearing capacity of the components. The combined interface is the weak link in the structural stress. The bonding interface is often destroyed first under the action of shrinkage difference or load. Whether the two materials can work together is a key issue that needs to be solved. Therefore, it is of great significance to enhance the mechanical properties of the combined interface.
[0003] Therefore, in view of these problems, the present invention proposes a UHPC-RC laminated plate interface connector. Summary of the invention
[0004] Aiming at the influence of the combined structure interface, the present invention proposes a UHPC-RC composite plate interface connector, which can improve the mechanical properties of the UHPC-RC interface and make the mechanical properties of the UHPC-RC composite plate have sufficient reliability.
[0005] The present invention is achieved through the following technical solutions:
[0006] A UHPC-RC composite plate interface connector includes a perforated channel steel, a through steel bar, and a high-strength bolt. A groove is cut at the interface of the UHPC-RC composite plate and a connector is installed, thereby improving the strength and bearing capacity of the UHPC-RC composite plate and the mechanical properties of the UHPC-RC composite plate interface.
[0007] As a preferred solution, the high-strength bolts are made of high-strength steel, have high structural strength, strong stress resistance, and are durable.
[0008] As a preferred solution, the RC concrete slab surface is chiseled with grooves for installing interface connectors.
[0009] As a preferred solution, the diameter of the through-steel bar needs to be smaller than the diameter of the hole of the hole-opening channel steel, while ensuring that the through-steel bar 2 is implanted into the RC concrete slab 4 and embedded in the UHPC concrete slab 5.
[0010] The implementation of the present invention has the following beneficial effects:
[0011] 1. High bearing capacity, good crack resistance and good mechanical properties.
[0012] 2. Simple structure, less steel consumption and controllable cost.
[0013] 3. Under the premise of ensuring the strength, rigidity and stability of the composite structure, the bonding between the UHPC concrete slab and the RC concrete slab is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the installation of the UHPC-RC composite plate interface connector of the present invention.
[0015] Figure 2 It is an overall three-dimensional model diagram of the UHPC-RC composite plate interface connector of the present invention.
[0016] Figure 3 It is a three-dimensional model diagram of the perforated channel steel of the UHPC-RC composite plate interface connector of the present invention. DETAILED DESCRIPTION
[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings.
[0018] like Figure 1-3 As shown, a UHPC-RC composite plate interface connector includes a perforated channel steel 1, a through steel bar 2, and a high-strength bolt 3. The interface connector is installed on the groove of the RC concrete plate 4, and the UHPC concrete plate 5 covers the RC concrete plate 4 to form a UHPC-RC composite plate, wherein the high-strength bolt 3 is embedded in the RC concrete plate, and the RC concrete plate steel bar 6 and the UHPC concrete plate steel bar 7 are arranged in the RC concrete plate 4 and the UHPC concrete plate 5 respectively.
[0019] The UHPC concrete slab 5 is specifically of RPC120 strength grade in the "Reactive Powder Concrete" (GB / T 31387-2015) specification.
[0020] The RC concrete slab 4 has a groove on its surface for installing the interface connector, and the width of the perforated channel steel 1 is consistent with the width of the groove.
[0021] The high-strength bolts 3 at the bottom of the perforated channel steel 1 of the interface connector are directly implanted into the RC concrete slab 4 .
[0022] Among them, high-strength bolts are made of high-strength steel, with high structural strength, strong stress resistance and durability.
[0023] The diameter of the through steel bar 2 needs to be smaller than the diameter of the hole of the hole channel steel 1, and at the same time, it is ensured that the through steel bar 2 is embedded in the RC concrete slab 4 and the UHPC concrete slab 5 that is cast after embedding.
[0024] It should be noted that the present invention is a UHPC-RC composite plate interface connector. When it is used in bridge engineering, the internal structural parameters used in different projects are different. The size of the perforated channel steel 1 and the groove width of the RC concrete plate 4, the size of the through steel bar 2, the size of the high-strength bolt 3, etc. can be determined according to the specific project.
[0025] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A UHPC-RC composite plate interface connector, comprising a perforated channel steel 1, a through steel bar 2, and a high-strength bolt 3. The interface connector is installed on a groove on a RC concrete plate 4, and a UHPC concrete plate 5 is covered on the RC concrete plate 4 to form a UHPC-RC composite plate, wherein the high-strength bolt 3 is embedded in the RC concrete plate, and the RC concrete plate steel bar 6 and the UHPC concrete plate steel bar 7 are arranged in the RC concrete plate 4 and the UHPC concrete plate 5, respectively.
2. The UHPC-RC laminated plate interface connector according to claim 1, characterized in that: A groove for installing the interface connector is chiseled on the surface of the RC concrete slab 4, and the width of the hole channel steel 1 is consistent with the width of the groove.
3. The UHPC-RC laminated plate interface connector according to claim 1, characterized in that: The diameter of the through steel bar 2 must be smaller than the diameter of the hole of the hole channel steel 1, while ensuring that the through steel bar 2 is embedded in the RC concrete slab 4 and the UHPC concrete slab 5.
4. The UHPC-RC laminated plate interface connector according to claim 1, characterized in that: The screw rod of the high-strength bolt 3 is implanted in the RC concrete slab 4 .
5. The UHPC-RC laminated plate interface connector according to claim 1, characterized in that: High-strength bolts are made of high-strength steel, with high structural strength, strong stress resistance and durability.
6. The UHPC-RC laminated plate interface connector according to claim 1, characterized in that: The UHPC concrete slab 5 is specifically of RPC120 strength grade in the specification of Reactive Powder Concrete (GB / T 31387-2015).
7. The UHPC-RC laminated plate interface connector according to claim 1, characterized in that: The RC concrete slab 4 and the UHPC concrete slab 5 have a reinforcement system formed by the RC concrete slab reinforcement 6 and the UHPC concrete slab reinforcement 7 .