Anchoring type steel and concrete combined reinforcing structure
By combining anchored steel sections with concrete to reinforce the structure, and utilizing the design of grid-like cast-in-place slabs and spring steel plates, the problems of bonding failure and complex construction in traditional bridge deck reinforcement methods have been solved, achieving a highly efficient bridge deck reinforcement effect and improving the load-bearing capacity and fatigue resistance of the bridge deck structure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG UNIV OF SCI & TECH
- Filing Date
- 2025-05-26
- Publication Date
- 2026-04-24
AI Technical Summary
Traditional bridge deck reinforcement methods suffer from problems such as easy peeling of the bond interface, insufficient fatigue resistance, poor durability, complex construction and long cycle, making it difficult to meet the needs of rapid reinforcement. Furthermore, the risk of bond failure is high under dynamic loads, and the connection nodes of steel and concrete composite reinforcement structures are complex and lack stress buffering mechanisms.
An anchored steel and concrete composite reinforcement structure is adopted. By setting a grid-like casting plate on the inner side of the steel and pouring concrete, a composite structure is formed. The compressive strength of concrete and the tensile and shear strength of steel are utilized, combined with spring steel plates and reinforcing ribs to achieve complementary material properties. The dynamic load is buffered by cross-shaped connection nodes and elastic deformation.
It significantly improves the overall load-bearing capacity and fatigue resistance of the bridge deck structure, reduces stress concentration, is suitable for high-load-frequency traffic scenarios, simplifies the construction process, and improves durability.
Smart Images
Figure CN224160993U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of civil engineering technology, and in particular relates to a composite reinforcement structure of anchored steel and concrete. Background Technology
[0002] In bridge engineering, bridge deck structures are prone to deterioration such as reduced load-bearing capacity and cracking due to long-term exposure to vehicle loads and environmental erosion, requiring reinforcement techniques to restore or improve their performance. Traditional bridge deck reinforcement methods, such as bonding steel plates and carbon fiber reinforcement, mainly rely on bonding materials to achieve synergistic stress distribution between the old and new structures. However, these methods suffer from problems such as easy peeling of the bond interface, insufficient fatigue resistance, and poor durability, especially under dynamic loads, where the risk of bond failure increases significantly. Furthermore, traditional reinforcement methods involve complex construction processes, requiring strict surface treatment of the original structure, significant on-site wet work, and long construction periods, making it difficult to meet the needs of rapid reinforcement.
[0003] To address the aforementioned issues, existing technologies have gradually developed into steel-concrete composite reinforcement techniques. These techniques combine the high strength of steel with the structural integrity of concrete, thereby improving the reinforcement effect to some extent. In recent years, this technology has been continuously optimized and developed in practical applications. However, there are still some areas for improvement: for example, the connection node structure is relatively complex, and there is potential for improvement in stress transfer efficiency; furthermore, existing reinforcement structures lack a more robust stress buffering and adjustment mechanism when adapting to the complex stress conditions of bridge decks, which may lead to some degree of structural damage due to localized stress concentration. Utility Model Content
[0004] The purpose of this invention is to provide a composite reinforcement structure of anchored steel and concrete. This invention can effectively buffer dynamic loads and reduce stress concentration, and is suitable for bridge deck reinforcement applications with high requirements for fatigue performance and durability.
[0005] The technical solution of this utility model is as follows: A composite reinforcement structure of anchored steel and concrete is used to reinforce bridge decks. It includes a steel section with first connecting rods connected to its front and rear ends; the inner wall of the steel section has a cast-in-place plate with a grid-like skeleton, and multiple second connecting rods connect the cast-in-place plates; the first connecting rods pass through the second connecting rods; a clamping member is fitted onto the first connecting rod, and a spring steel plate is fixed to the clamping member; multiple casting holes are provided at the front and rear ends of the steel section, through which concrete is poured and filled.
[0006] In the aforementioned reinforced structure combining anchored steel and concrete, the second connecting rod is provided with a first connecting hole that mates with the first connecting rod; the first connecting rod passes through the first connecting hole.
[0007] In the aforementioned reinforced structure combining anchored steel and concrete, the front and rear ends of the steel are provided with second connecting holes, and the two ends of the first connecting rod pass through the second connecting holes and are threadedly connected to connecting seats; the connecting seats are connected to the steel by bolt groups.
[0008] In the aforementioned reinforced structure combining anchored steel and concrete, the clamping member includes a pair of U-shaped bars and a top plate, with the top plate threadedly connected to the U-shaped bars; the second connecting rod is provided with a connecting part, and the U-shaped bars are sleeved on the first connecting rod and located on both sides of the connecting part; the top plate and the spring steel plate are fixed by bolts, and the bottom surface of the spring steel plate is in contact with the top surface of the connecting part.
[0009] In the aforementioned reinforced structure combining anchored steel and concrete, the outer wall of the steel is provided with multiple sets of reinforcing ribs.
[0010] In the aforementioned reinforced structure combining anchored steel and concrete, multiple sets of expansion bolts are provided along both sides of the steel section, and the steel section is connected to the bridge deck via the expansion bolts.
[0011] In the aforementioned anchored steel and concrete composite reinforcement structure, the spring steel plate includes a first steel plate, a second steel plate, and a third steel plate, which are curved and sequentially welded together.
[0012] In the aforementioned reinforced structure combining anchored steel and concrete, the bending angles of the first, second, and third steel plates are 120°-140°.
[0013] In the aforementioned reinforced structure combining anchored steel and concrete, the grid-like skeleton of the cast-in-place slab is rectangular with a short side dimension of 5-20 cm, and the spacing between the cast-in-place slabs is 10-50 cm.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] This invention utilizes a grid-like skeleton casting plate set on the inner side of the steel profile to form a steel-concrete composite structure after concrete is poured. By leveraging the compressive strength of concrete and the tensile and shear strength of the steel profile, complementary material properties are achieved, significantly improving the overall load-bearing capacity. The invention uses a first connecting rod passing through the first connecting hole of a second connecting rod, and fixed to the steel profile with bolts at both ends, forming a "cross-shaped" connection node. This simple structure and clear force transmission path ensure effective shear force transfer between the steel profile and concrete, preventing interface bonding failure. The spring steel plate (composed of a first steel plate, a second steel plate, and a third steel plate bent and welded) has elastic deformation capability, effectively buffering dynamic loads on the bridge deck (such as vibrations from vehicle traffic), reducing stress concentration, and significantly improving the structure's fatigue resistance, making it suitable for high-load-frequency traffic scenarios. Furthermore, the reinforcing ribs on the outer side of the steel profile enhance its rigidity and deformation resistance, preventing buckling caused by long-term loads. Attached Figure Description
[0016] Figure 1 This is the front view of this utility model;
[0017] Figure 2 This is an exploded view of the structure of this utility model;
[0018] Figure 3 This is a schematic diagram of the bridge deck installation of this utility model.
[0019] The markings in the attached diagram are as follows: 1. Structural steel; 2. First connecting rod; 3. Second connecting rod; 4. Casting plate; 5. Spring steel plate; 501. First steel plate; 502. Second steel plate; 503. Third steel plate; 6. Hoop; 601. U-shaped rib; 602. Top plate; 7. Casting hole; 8. Connecting seat; 9. Connecting part; 10. First connecting hole; 11. Second connecting hole; 12. Reinforcing rib. Detailed Implementation
[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.
[0021] Example: A composite reinforcement structure of anchored steel and concrete, such as Figure 1-3As shown, this structure, used to reinforce the bridge deck, includes a steel section 1, with first connecting rods 2 connected to its front and rear ends. The inner wall of the steel section 1 has a grid-like skeleton of cast-in-place plates 4. The cast-in-place plates 4 have a rectangular structure, with the shorter side typically ranging from 5 to 20 centimeters. Smaller dimensions better constrain the concrete, enhancing adhesion and improving structural integrity; larger dimensions reduce the amount of skeleton material used, lowering costs. The spacing of the cast-in-place plates 4 is determined based on the site conditions, typically between 10 and 50 centimeters, depending on the steel section dimensions, concrete pouring requirements, and structural stress. A reasonable spacing ensures that the concrete fully fills the grid while maintaining sufficient constraint on the concrete from the skeleton. Two second connecting rods 3 connect the cast-in-place plates 4. Each second connecting rod 3 has a first connecting hole 10 that mates with the first connecting rod 2. The first connecting rod 2 passes through the first connecting hole 10. The steel section 1 has second connecting holes 11 at both ends. The two ends of the first connecting rod 2 pass through the second connecting holes 11 and are threadedly connected to connecting seats 8. The connecting seats 8 are connected to the steel section 1 by bolts. The first connecting rod 2 passes through the second connecting holes 11 at both ends of the steel section 1 and is fixed to the steel section 1 by bolts through the connecting seats 8 at both ends, forming a longitudinal force channel to transfer the longitudinal load of the bridge deck. The first connecting rod 2 passes through the first connecting hole 10 of the second connecting rod 3, forming a "cross" grid structure with the second connecting rod 3, connecting the steel section 1 and the concrete as a whole, ensuring that the shear force is effectively transferred between the steel section 1 and the concrete. A clamping member 6 is fitted on the first connecting rod 2, and a spring steel plate 5 is fixed on the clamping member 6. The clamping member 6 includes a pair of U-shaped bars 601 and a top plate 602. The top plate 602 is threadedly connected to the U-shaped bars 601. The threaded connection of the clamping member 6 achieves pre-tightening, always maintaining a compressed state, ensuring the continuity of stress transfer, and avoiding failure caused by relaxation of the traditional bonding interface. The second connecting rod 3 is provided with a connecting part 9. U-shaped ribs 601 are sleeved on the first connecting rod 2 and are located on both sides of the connecting part 9. The top plate 602 is fixed to the spring steel plate 5 with bolts, and the bottom surface of the spring steel plate 5 is in contact with the top surface of the connecting part 9. The stress caused by dynamic load is transferred to the spring steel plate 5 through mechanical connection, realizing stress buffering. The spring steel plate 5 includes a first steel plate 501, a second steel plate 502, and a third steel plate 503. The first steel plate 501, the second steel plate 502, and the third steel plate 503 are curved and are welded together in sequence. They absorb the energy generated by the dynamic load of the bridge deck (such as vehicle vibration) by elastic deformation, reduce the stress peak, and avoid structural fatigue cracking. Since the spring steel plate 5 is made of three curved steel plates welded together, its curved shape can be arc-shaped. Based on the function of buffering dynamic load and reducing stress concentration, the arc design allows the spring steel plate to undergo more uniform elastic deformation when under force. Its bending angle can be between 120° and 140°. The angle can be determined and set according to the load of the product.Two pouring holes 7 are provided at the front and rear ends of the steel section 1. Concrete is poured and filled into the steel section 1 through the pouring holes 7 to bear the compressive stress and form a composite section with the steel section 1, which greatly improves the compressive bearing capacity of the structure. Five sets of reinforcing ribs 12 are provided on the outer wall of the steel section 1 to enhance the buckling resistance of the steel section 1, prevent local instability of the steel section 1 due to long-term load, and ensure its stability as a load-bearing skeleton. Ten sets of expansion bolts are provided on both sides of the steel section 1. The steel section 1 is connected to the bridge deck through the expansion bolts to provide reliable anchoring force and transfer the self-weight of the structure and external loads to the original bridge deck.
[0022] This invention utilizes a grid-like skeleton casting plate 4 set on the inner side of the steel section 1 to form a composite structure of steel and concrete after concrete is poured. By leveraging the compressive strength of the concrete and the tensile and shear strength of the steel section 1, complementary material properties are achieved, significantly improving the overall load-bearing capacity. The invention uses a first connecting rod 2 that passes through the first connecting hole 10 of the second connecting rod 3 and is bolted to the steel section 1 via connecting seats 8 at both ends, forming a "cross-shaped" connection node. This simple structure and clear force transmission path ensure effective shear force transfer between the steel section 1 and the concrete, preventing interface bonding failure. The spring steel plate 5 (formed by bending and welding the first steel plate 501, the second steel plate 502, and the third steel plate 503) has elastic deformation capability, effectively buffering dynamic loads on the bridge deck (such as vibrations generated by vehicle movement), reducing stress concentration, and significantly improving the structure's fatigue resistance, making it suitable for high-load-frequency traffic scenarios. Furthermore, the reinforcing ribs 12 set on the outer side of the steel section 1 enhance its rigidity and deformation resistance, preventing buckling of the steel section 1 due to long-term load.
[0023] Work process
[0024] A second connecting rod 3 is installed between the casting plates 4 on the inner wall of the steel section 1, aligning the first connecting hole 10 of the second connecting rod 3 with the first connecting rod 2. The first connecting rod 2 is then inserted into the first connecting hole 10, forming a "cross" grid structure to provide a support frame for subsequent concrete pouring. The first connecting rod 2 is passed through the second connecting holes 11 at the front and rear ends of the steel section 1, and both ends are threaded to connecting seats 8. The connecting seats 8 are fixed to the steel section 1 using bolts to form a longitudinal main force rod. A pair of U-shaped ribs 601 are fitted onto the first connecting rod 2, positioned on both sides of the connecting part 9 of the second connecting rod 3. The top plate 602 is then threaded to the U-shaped ribs 601, initially fixed to the first connecting rod 2. The top plate 602 is fixed to the spring steel plate 5 using bolts. Tightening the threads compresses the spring steel plate 5, generating a preload. The reaction force of the spring steel plate 5 is transmitted to the first connecting rod 2 and the second connecting rod 3 through the U-shaped ribs 601 and the top plate 602, forming a stress buffer node. Spring steel plate 5 is placed on the top surface of connecting part 9, and top plate 602 is fixed to spring steel plate 5 with bolts. Tightening the threads compresses spring steel plate 5 to generate preload. The reaction force of spring steel plate 5 is transferred to first connecting rod 2 and second connecting rod 3 through U-shaped rib 601 and top plate 602, forming a stress buffer node. The installation position of steel section 1 is marked on the bridge deck, and expansion bolts are used to fix steel section 1 to the bridge deck to form a basic support frame. The mechanical anchoring effect of expansion bolts ensures reliable connection between steel section 1 and bridge deck, transferring the self-weight of the reinforced structure and external loads. Then, concrete is poured into the pouring hole 7 to form a composite structure of steel section and concrete. By utilizing the compressive strength of concrete and the tensile and shear strength of steel section 1, the material properties are complementary, significantly improving the overall load-bearing capacity.
[0025] In summary, this invention can effectively buffer dynamic loads and reduce stress concentration, making it suitable for bridge deck reinforcement applications where fatigue performance and durability requirements are high.
Claims
1. A composite reinforcement structure of anchored steel and concrete for reinforcing bridge decks, characterized in that: The steel section (1) includes a steel section (1) with a first connecting rod (2) connected to its front and rear ends; the inner wall of the steel section (1) has a cast-in-place plate (4) with a grid-like skeleton, and multiple second connecting rods (3) are connected between the cast-in-place plates (4); the first connecting rod (2) passes through the second connecting rod (3); a clamping member (6) is fitted on the first connecting rod (2), and a spring steel plate (5) is fixed on the clamping member (6); multiple casting holes (7) are provided at the front and rear ends of the steel section (1), and concrete is poured and filled into the steel section (1) through the casting holes (7).
2. The anchorage type steel and concrete combined reinforcement structure according to claim 1, characterized in that: The second connecting rod (3) is provided with a first connecting hole (10) that mates with the first connecting rod (2); the first connecting rod (2) passes through the first connecting hole (10).
3. The anchorage type steel-concrete composite reinforced structure according to claim 1, wherein: The front and rear ends of the steel section (1) are provided with second connecting holes (11), and the two ends of the first connecting rod (2) pass through the second connecting holes (11) and are threadedly connected to the connecting seat (8); the connecting seat (8) is connected to the steel section (1) by bolt group.
4. The anchorage type steel and concrete composite reinforced structure according to claim 1, characterized in that: The clamping member (6) includes a pair of U-shaped ribs (601) and a top plate (602), the top plate (602) being threadedly connected to the U-shaped ribs (601); the second connecting rod (3) is provided with a connecting part (9), the U-shaped ribs (601) being sleeved on the first connecting rod (2) and located on both sides of the connecting part (9); the top plate (602) is fixed to the spring steel plate (5) by bolts, and the bottom surface of the spring steel plate (5) is in contact with the top surface of the connecting part (9).
5. The anchorage type steel and concrete combined reinforcement structure according to claim 1, characterized in that: The outer wall of the steel section (1) is provided with multiple sets of reinforcing ribs (12).
6. The composite reinforcement structure of anchored steel and concrete according to claim 1, characterized in that: Multiple sets of expansion bolts are provided on both sides of the steel section (1), and the steel section (1) is connected to the bridge deck through the expansion bolts.
7. The composite reinforcement structure of anchored steel and concrete according to claim 1, characterized in that: The spring steel plate (5) includes a first steel plate (501), a second steel plate (502) and a third steel plate (503), which are bent and welded together in sequence.
8. The anchorage type steel-concrete composite reinforced structure according to claim 7, characterized in that: The bending angles of the first steel plate (501), the second steel plate (502), and the third steel plate (503) are 120°-140°.
9. The composite reinforcement structure of anchored steel and concrete according to claim 1, characterized in that: The grid-like skeleton of the casting plate (4) is rectangular, with a short side dimension of 5-20 cm, and the spacing between the casting plates (4) is 10-50 cm.