Bridge reinforced concrete T-beam reinforced concrete combination performance improving device
By installing a steel structure under the bridge T-beam, the problem that existing reinforcement methods cannot fully improve the load-bearing capacity and increase the dead load is solved, and efficient reinforcement of the bridge reinforced concrete T-beam is achieved, improving the load-bearing capacity and stiffness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUASHE TESTING TECH CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-05-01
AI Technical Summary
Existing reinforced concrete T-beams of bridges are prone to defects and reduced load-bearing capacity under heavy-load transportation conditions. Existing reinforcement methods cannot fully improve the load-bearing capacity and increase the dead load, resulting in high structural complexity and poor construction feasibility.
A steel structure, including a base steel structure and a reinforcing steel structure, is installed under the bridge T-beam. The structure is fixedly connected by anchor bolts and structural adhesive to form a U-shaped outer steel plate, making full use of the tensile properties of the steel.
While reducing dead load, it significantly improves the performance of steel-concrete composite concrete T-beams. The structure is simple, easy to install, low in cost, and the strength is increased by 41.5%, the stiffness is increased by 54.9%, and the live load effect is reduced by 37.6%.
Smart Images
Figure CN224186628U_ABST
Abstract
Description
A device for improving the performance of reinforced concrete T-beams in bridges Technical Fields
[0001] This utility model belongs to the field of bridge engineering technology, specifically relating to a device for improving the performance of reinforced concrete T-beams in bridges. Background Technology:
[0002] With technological advancements, bridge structures and construction techniques have become increasingly sophisticated. Early bridges, however, featured lower load standards in their reinforced concrete T-beam designs, lower beam heights, and weaker transverse connections, resulting in insufficient strength to meet requirements. Furthermore, early bridges are prone to defects and reduced load-bearing capacity under heavy transport conditions, necessitating reinforcement of their reinforced concrete T-beams.
[0003] Current reinforcement methods mainly include bonding steel plates, bonding carbon fiber plates, increasing the cross-section, or adding truss structures. However, the size of the bonded steel plates or prestressed carbon fiber plates is limited, resulting in a limited increase in load-bearing capacity, which cannot comprehensively solve the service conditions of aging T-beams. While increasing the cross-section or using truss structures can improve the stiffness of the T-beams, it leads to a significant increase in dead load, which is detrimental to the original structure, and the structure is complex with poor construction feasibility. Therefore, there is a need to design a reinforcement device that can reduce the dead load of T-beams, improve the performance of steel-concrete composite concrete T-beams, and has a simple structure to solve the above problems. Invention content:
[0004] The purpose of this invention is to address the problems existing in the prior art by providing a device for improving the performance of reinforced concrete T-beam steel-concrete composite structures for bridges.
[0005] The present invention adopts the following technical solution:
[0006] This utility model provides a device for improving the performance of reinforced concrete T-beams in bridges, comprising a steel structure, which is fixedly installed under the T-beams of the bridge.
[0007] As a further preferred embodiment of this utility model, it also has the following features: the steel structure includes a base steel structure and a reinforcing steel structure; the base steel structure is fixedly connected to the lower end of the bridge's T-beam, and the reinforcing steel structure is distributed below the base steel structure and is fixedly connected to the base steel structure.
[0008] As a further preferred embodiment of this utility model, it also has the following features: the base steel structure includes a horizontal steel plate, a first vertical steel plate, and a second vertical steel plate; the horizontal steel plate is fixedly connected to the lower surface of the web of the bridge T-beam, and the width of the horizontal steel plate is greater than the width of the bridge T-beam; the first vertical steel plate and the second vertical steel plate are respectively disposed on both sides of the bridge T-beam and fixedly connected to the two sides of the bridge T-beam, and the lower ends of the first vertical steel plate and the second vertical steel plate are respectively fixedly connected to the horizontal steel plate.
[0009] As a further preferred embodiment of this utility model, it also has the following features: the horizontal steel plates are distributed along the extension direction of the bridge T-beam; the first vertical steel plate and the second vertical steel plate are parallel and distributed along the extension direction of the bridge T-beam; the width of the horizontal steel plate is greater than the distance between the first vertical steel plate and the second vertical steel plate.
[0010] As a further preferred embodiment of this utility model, it also has the following features: the first vertical steel plate, the second vertical steel plate, and the bridge T-beam are fixedly connected by horizontal anchor bolts; the first vertical steel plate and the second vertical steel plate are respectively provided with first through holes at corresponding positions, the bridge T-beam is provided with a horizontal through hole, and the horizontal anchor bolt passes through the first through hole and the horizontal through hole and is fixedly connected to a nut; the horizontal steel plate and the bridge T-beam are fixedly connected by vertical anchor bolts; the horizontal steel plate is provided with a second through hole, the bottom of the bridge T-beam is provided with a vertical through hole, and the vertical anchor bolt passes through the second through hole and the vertical through hole and is fixedly connected to a nut.
[0011] As a further preferred embodiment of this utility model, it also has the following features: the central axis of the bridge T-beam and the central axis of the horizontal steel plate are distributed in the same plane, and the vertical anchor bolts are distributed on the central axis of the bridge T-beam.
[0012] As a further preferred embodiment of this utility model, it also has the following features: the reinforced steel structure includes a first channel steel, a second channel steel, and a connecting plate; the upper flanges of the first channel steel and the second channel steel are respectively fixedly connected to the lower surface of the horizontal steel plate; the connecting plate is distributed below the first channel steel and the second channel steel, and is also fixedly connected to the lower flanges of the first channel steel and the second channel steel.
[0013] As a further preferred embodiment of this utility model, it also has the following features: the openings of the first channel steel and the second channel steel face outwards and are mirror-symmetrical about the central axis of the bridge T-beam; the distance between the first channel steel and the second channel steel is less than the width of the bridge T-beam.
[0014] As a further preferred embodiment of this utility model, it also has the following feature: the gusset plates are equidistantly distributed along the extension direction of the bridge T-beam.
[0015] The beneficial effects of this utility model are:
[0016] (1) This utility model fully utilizes the tensile properties of steel by setting a steel structure under the existing reinforced concrete T-beam structure, greatly improving the steel-concrete composite performance of the concrete T-beam. It is simple in structure, easy to install, and low in cost, and can be used to improve the strength of old reinforced concrete T-beams.
[0017] (2) In this utility model, the steel structure only includes horizontal steel plates, two vertical steel plates, two channel steels and several gusset plates. Compared with the existing reinforced concrete T-beam reinforcement structure, it greatly reduces the structural complexity and the dead load of the reinforced concrete T-beam. The reinforcement device is lightweight and accounts for less than 2.3% of the original T-beam dead load. After the addition of the steel composite structure system, the live load effect borne by the original T-beam structure is reduced by more than 37.6%. The overall strength can be increased by 41.5% and the stiffness can be increased by 54.9%, which greatly improves the performance of old bridges. Figure description:
[0018] Figure 1 is a schematic diagram of the structure of an embodiment of the present utility model;
[0019] Figure 2 is a cross-sectional view of the structure of an embodiment of the present utility model;
[0020] Figure 3 is a partial enlarged view of an embodiment of the present invention;
[0021] The labels in the attached diagram are:
[0022] 1. Horizontal steel plate; 2. First vertical steel plate; 3. Second vertical steel plate; 4. First channel steel; 5. Second channel steel; 6. Connecting plate; 7. Horizontal anchor bolt; 8. Vertical anchor bolt. Detailed implementation method:
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0024] Referring to Figures 1 and 2, this embodiment of the present invention provides a performance enhancement device for reinforced concrete T-beams of bridges, comprising a steel structure fixedly installed below the T-beams of the bridge. The steel structure includes a base steel structure and a reinforcing steel structure. The base steel structure is fixedly connected to the lower end of the T-beams of the bridge, and the reinforcing steel structure is distributed below the base steel structure and fixedly connected to the base steel structure.
[0025] Specifically, as shown in Figure 2, the base steel structure includes a horizontal steel plate 1, a first vertical steel plate 2, and a second vertical steel plate 3, both of which have the same specifications. The horizontal steel plate 1 is fixedly connected to the lower surface of the web of the bridge T-beam, and the width of the horizontal steel plate 1 is greater than the width of the bridge T-beam. The first vertical steel plate 2 and the second vertical steel plate 3 are respectively located on both sides of the bridge T-beam and fixedly connected to the two sides of the bridge T-beam. The lower ends of the first vertical steel plate 2 and the second vertical steel plate 3 are fixedly connected to the horizontal steel plate 1, forming a U-shaped structure with the horizontal steel plate 1.
[0026] As shown in Figure 1, horizontal steel plates 1 are distributed along the extension direction of the bridge T-beams. First vertical steel plates 2 and second vertical steel plates 3 are parallel and distributed along the extension direction of the bridge T-beams. The width of the horizontal steel plates 1 is greater than the distance between the first vertical steel plates 2 and the second vertical steel plates 3.
[0027] As shown in Figure 1, the reinforcing steel structure includes a first channel steel 4, a second channel steel 5, and connecting plates 6. The first channel steel 4 and the second channel steel 5 have outward openings and are mirror-symmetrical about the central axis of the bridge T-beam. The distance between the first channel steel 4 and the second channel steel 5 is less than the width of the bridge T-beam. The upper surfaces of the upper flanges of the first channel steel 4 and the second channel steel 5 are fixedly connected (welded) to the lower surface of the horizontal steel plate 1. The connecting plates 6 are distributed below the first channel steel 4 and the second channel steel 5, and are also fixedly connected (welded) to the lower surfaces of the lower flanges of the first channel steel 4 and the second channel steel 5. The connecting plates 6 are equidistantly distributed along the extension direction of the bridge T-beam.
[0028] In a preferred embodiment of this utility model, the first vertical steel plate 2, the second vertical steel plate 3, and the bridge T-beam are fixedly connected by horizontal anchor bolts 7 and structural adhesive, and the horizontal steel plate 1 and the bridge T-beam are fixedly connected by vertical anchor bolts 8 and structural adhesive.
[0029] As shown in Figure 1, the lower edges of the web of the bridge T-beam are bonded to the first vertical steel plate 2 and the second vertical steel plate 3 using structural adhesive. Furthermore, the first vertical steel plate 2 and the second vertical steel plate 3 each have corresponding first through holes. Correspondingly, the bridge T-beam has horizontal through holes. Horizontal anchor bolts 7 pass through the first through holes and the horizontal through holes and are fixedly connected to nuts, thus achieving a fixed connection between the first vertical steel plate 2, the second vertical steel plate 3, and the bridge T-beam. The bottom surface of the bridge T-beam web is bonded to the horizontal steel plate 1 using structural adhesive. Furthermore, the horizontal steel plate 1 has a second through hole. Correspondingly, the bottom of the bridge T-beam web has a vertical through hole at a corresponding position. Vertical anchor bolts 8 pass through the second through hole and the vertical through hole and are fixedly connected to nuts, thus achieving a fixed connection between the horizontal steel plate 1 and the bridge T-beam. This embodiment forms a U-shaped outer steel plate through structural adhesive and anchor bolt anchoring technology.
[0030] As shown in Figure 1, the central axis of the cross-section of the bridge T-beam and the central axis of the horizontal steel plate 1 are distributed in the same plane, and the vertical anchor bolts 8 are distributed on the central axis of the bridge T-beam.
[0031] A typical 20m span reinforced concrete T-beam bridge was selected, and the superstructure 20m T-beam was modified and reinforced using this scheme. The results were verified on a real bridge. Under the same vehicle load conditions, the deflection value was smaller after adding the steel structure of this scheme, as shown in Table 1.
[0032] Table 1: Deflection values of a 20m T-beam under loading conditions
[0033] Beam No. Unreinforced (mm) Steel Plate Reinforced (mm) Steel Structure Reinforced (mm) 6# (Inner Beam) -2.23 -4.31 -2.61 5# -6.83 -6.37 -3.74 4# -9.54 -6.85 -4.19 3# -12.21 -8.64 -4.94 2# -10.80 -9.66 -5.77 1# (Outer Beam) -6.61 -10.07 -6.02 surface
[0034] This invention, by setting a steel structure under the reinforced concrete T-beam, can greatly improve the performance of the steel-concrete composite of the T-beam while reducing the dead load of the T-beam. It is simple in structure, easy to install, and low in cost. It can be used to improve the strength of old reinforced concrete T-beams and improve the service performance of bridges.
[0035] The above are merely preferred embodiments of this utility model. The scope of protection of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model are within the scope of protection of this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should be considered within the scope of protection of this utility model.
Claims
1. A device for improving the performance of reinforced concrete T-beams in bridges, characterized in that, The system includes a steel profile structure, which is fixedly installed below the T-beams of the bridge. The steel profile structure includes a base steel structure and a reinforcing steel structure. The base steel structure is fixedly connected to the lower end of the T-beams of the bridge, and the reinforcing steel structure is distributed below the base steel structure and fixedly connected to the base steel structure.
2. The performance enhancement device for reinforced concrete T-beams of bridges according to claim 1, characterized in that, The base steel structure includes a horizontal steel plate (1), a first vertical steel plate (2), and a second vertical steel plate (3); the horizontal steel plate (1) is fixedly connected to the lower surface of the web of the bridge T-beam, and the width of the horizontal steel plate (1) is greater than the width of the bridge T-beam; the first vertical steel plate (2) and the second vertical steel plate (3) are respectively set on both sides of the bridge T-beam and fixedly connected to the two sides of the bridge T-beam, and the lower ends of the first vertical steel plate (2) and the second vertical steel plate (3) are respectively fixedly connected to the horizontal steel plate (1).
3. The performance enhancement device for reinforced concrete T-beam steel-concrete composite bridges according to claim 2, characterized in that, The horizontal steel plate (1) is distributed along the extension direction of the bridge T-beam; the first vertical steel plate (2) and the second vertical steel plate (3) are parallel and distributed along the extension direction of the bridge T-beam; the width of the horizontal steel plate (1) is greater than the distance between the first vertical steel plate (2) and the second vertical steel plate (3).
4. The performance enhancement device for reinforced concrete T-beams of bridges according to claim 2, characterized in that, The first vertical steel plate (2) and the second vertical steel plate (3) are fixedly connected to the bridge T-beam by horizontal anchor bolts (7); the first vertical steel plate (2) and the second vertical steel plate (3) are respectively provided with first through holes corresponding to their positions, the bridge T-beam is provided with horizontal through holes, and the horizontal anchor bolts (7) pass through the first through holes and the horizontal through holes and are fixedly connected with nuts; the horizontal steel plate (1) is fixedly connected to the bridge T-beam by vertical anchor bolts (8); the horizontal steel plate (1) is provided with second through holes, the bottom of the bridge T-beam is provided with vertical through holes, and the vertical anchor bolts (8) pass through the second through holes and the vertical through holes and are fixedly connected with nuts.
5. The performance enhancement device for reinforced concrete T-beams of bridges according to claim 4, characterized in that, The central axis of the bridge T-beam and the central axis of the horizontal steel plate (1) are distributed in the same plane, and the vertical anchor bolts (8) are distributed on the central axis of the bridge T-beam.
6. The performance enhancement device for reinforced concrete T-beams of bridges according to claim 2, characterized in that, The reinforced steel structure includes a first channel steel (4), a second channel steel (5), and a gusset plate (6); the upper flanges of the first channel steel (4) and the second channel steel (5) are fixedly connected to the lower surface of the horizontal steel plate (1); the gusset plate (6) is distributed below the first channel steel (4) and the second channel steel (5), and is fixedly connected to the lower flanges of the first channel steel (4) and the second channel steel (5).
7. The performance enhancement device for reinforced concrete T-beams of bridges according to claim 6, characterized in that, The first channel steel (4) and the second channel steel (5) have outward openings and are mirror-symmetrical about the central axis of the bridge T-beam; the distance between the first channel steel (4) and the second channel steel (5) is less than the width of the bridge T-beam.
8. The performance enhancement device for reinforced concrete T-beams of bridges according to claim 6, characterized in that, The gusset plates (6) are equidistantly distributed along the extension direction of the bridge T-beam.