Bridge high bearing capacity joint optimization structure

Abstract

The utility model belongs to bridge building technical field discloses a kind of bridge high bearing capacity node optimization structure, including H-shaped steel, H-shaped steel is connected with link steel by reinforcing bolt and reinforcing nut, first hinged seat is equipped on link steel, transverse I-beam is installed on link steel, second hinged seat is equipped on transverse I-beam;Link member is connected between first hinged seat and second hinged seat, link member includes core energy consumption section, transition section and elastic connecting section, first hinged seat, second hinged seat and link member form triangular force transmission mechanism, core energy consumption section is equal cross section steel plate, two end elastic connecting sections are connected with first hinged seat and second hinged seat, top angle angle of triangular force transmission mechanism is 45 °-60 °, and the axis of first hinged seat and H-shaped steel web center line present 10 °-15 ° angle of inclusion.The utility model not only can realize the multidirectional transmission of node area force, but also can avoid the stiffness mutation problem caused by traditional welding, and can inhibit the expansion of microcrack.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to an optimized structure for high load-bearing capacity bridge nodes. Background Technology

[0002] The high-load-bearing capacity optimized bridge node structure is a bridge structure form that significantly improves the load-bearing capacity and safety of key connection parts (nodes) through targeted design and improvement. Its core lies in the scientific reinforcement of the node area to ensure that it can efficiently transmit internal forces and avoid failure under complex loads.

[0003] Traditional bridge joints often use welding connections, which can lead to abrupt changes in stiffness in the joint area. This can cause microcracks to propagate, especially when subjected to dynamic loads. Therefore, we propose an optimized structure for high-load-bearing bridge joints. Utility Model Content

[0004] In view of the fact that most existing bridge nodes adopt welding connection, there is a sudden change in stiffness in the node area, which is prone to microcrack propagation, especially when subjected to dynamic loads. Therefore, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] An optimized structure for high load-bearing capacity bridge nodes includes an H-beam, which is connected to a connecting steel via reinforcing bolts and reinforcing nuts. The connecting steel is provided with a first hinge seat, a transverse I-beam is installed on the connecting steel, and a second hinge seat is provided on the transverse I-beam.

[0007] A connecting member is connected between the first hinge seat and the second hinge seat. The connecting member includes a core energy-consuming section, a transition section, and an elastic connecting section. The first hinge seat, the second hinge seat, and the connecting member form a triangular force transmission mechanism.

[0008] As a technical solution for the optimized structure of a high-bearing-capacity bridge node according to this utility model, the core energy-dissipating section is a steel plate with a uniform cross section, the transition section is a trapezoidal gradually changing steel plate, and the elastic connecting sections at both ends are connected to the first hinge seat and the second hinge seat.

[0009] As a technical solution for the optimized structure of a high-bearing-capacity bridge node according to the present invention, the apex angle of the triangular force transmission mechanism is 45°-60°, and the axis of the first hinge seat forms an angle of 10°-15° with the center line of the web of the H-shaped steel.

[0010] As a technical solution for the optimized structure of a high-bearing-capacity bridge node described in this utility model, the reinforcing bolt is a double-ended bolt, and the middle part of the double-ended bolt shaft is provided with an annular pressure-reducing groove, and the threaded part of the double-ended bolt adopts a sawtooth thread.

[0011] As a technical solution for the optimized structure of a high-bearing-capacity bridge node described in this utility model, the reinforcing nut is embedded with a nylon locking ring, and the end face of the reinforcing nut is provided with radial anti-loosening teeth.

[0012] As a technical solution for the optimized structure of a high-bearing-capacity bridge node according to this utility model, wherein: the contact surface between the connecting steel and the H-beam is provided with interlocking shear protrusions, and the height of the shear protrusions is one-third of the thickness of the connecting steel plate.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects:

[0014] 1. This utility model, through the bolt connection of H-beams and connecting steel with the triangular force transmission mechanism design, can realize the multi-directional transmission of force in the node area, avoiding the stiffness change problem caused by traditional welding. At the same time, the combination of the core energy-dissipating section and the elastic connection section allows the node to absorb energy through deformation under dynamic load, suppressing the propagation of microcracks.

[0015] 2. In this utility model, by setting up connecting components, under dynamic loads, the core energy-dissipating section of the uniform cross-section steel plate can uniformly distribute stress, the trapezoidal gradual transition section reduces stress concentration caused by abrupt changes in cross-section, and the flexible characteristics of the elastic connection section reduce the risk of brittle failure of the node. The three components work together to improve the fatigue life of the node. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0017] Figure 1 This is a schematic diagram of the overall main structure of this utility model.

[0018] Figure 2 This is a schematic side view of the overall structure of this utility model.

[0019] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0020] Explanation of reference numerals in the attached figures:

[0021] In the diagram: 1. H-beam; 2. Reinforcing bolt; 3. Reinforcing nut; 4. Connecting steel; 401. First hinge seat; 5. Transverse I-beam; 501. Second hinge seat; 601. Core energy-consuming section; 602. Transition section; 603. Elastic connection section. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Reference Figures 1-3 An optimized structure for high load-bearing capacity bridge nodes is provided. This optimized structure for high load-bearing capacity bridge nodes includes an H-beam 1, which is connected to a connecting steel 4 by reinforcing bolts 2 and reinforcing nuts 3. The connecting steel 4 is provided with a first hinge seat 401, and a transverse I-beam 5 is installed on the connecting steel 4. The transverse I-beam 5 is provided with a second hinge seat 501.

[0024] A connecting component is provided between the first hinge seat 401 and the second hinge seat 501. The connecting component includes a core energy-dissipating section 601, a transition section 602, and an elastic connecting section 603. The core energy-dissipating section 601 is made of LY160 low yield point steel, and the transition section 602 is made of Q345C steel, forming a stiffness gradient. The elastic connecting section 603 has an initial assembly gap of 3mm, allowing for 0.5rad plastic rotation energy dissipation. The first hinge seat 401, the second hinge seat 501, and the connecting component form a triangular force transmission mechanism. In application, the triangular force transmission mechanism design, combined with the bolt connection between the H-beam 1 and the connecting steel 4, enables multi-directional force transmission in the node area, avoiding the stiffness abrupt change problem caused by traditional welding. At the same time, the combination of the core energy-dissipating section 601 and the elastic connecting section 603 allows the node to absorb energy through deformation under dynamic loads, suppressing microcrack propagation.

[0025] Reference Figure 2 and Figure 3 The core energy-dissipating section 601 is a steel plate with a uniform cross-section, the transition section 602 is a trapezoidal gradually changing steel plate, and the elastic connection sections 603 at both ends are connected to the first hinge seat 401 and the second hinge seat 501. In application, the core energy-dissipating section 601 with a uniform cross-section can evenly distribute stress, the trapezoidal gradually changing transition section 602 reduces stress concentration caused by abrupt changes in cross-section, and the flexible characteristics of the elastic connection section 603 reduce the risk of brittle failure of the node. The three work together to improve the fatigue life of the node.

[0026] Reference Figure 2 and Figure 3The apex angle of the triangular force transmission mechanism is 45°-60°, and the axis of the first hinge seat 401 forms an angle of 10°-15° with the center line of the web of the H-beam 1. In application, the 45°-60° apex angle optimizes the force transmission path direction. Combined with the 10°-15° angle between the axis of the first hinge seat 401 and the web of the H-beam 1, an asymmetric force mode is formed, which significantly reduces the local stress peak in the node area.

[0027] Reference Figure 1 and Figure 2 The reinforcing bolt 2 is a double-ended bolt, and the middle of the shank of the double-ended bolt is provided with an annular pressure relief groove. The threaded part of the double-ended bolt adopts a sawtooth thread. In application, the annular pressure relief groove design of the double-ended bolt disperses the stress at the root of the thread, and the sawtooth thread can improve the shear strength, which is especially suitable for high-frequency vibration conditions.

[0028] Reference Figure 1 and Figure 2 The reinforcing nut 3 has an embedded nylon locking ring, and the end face of the reinforcing nut 3 is provided with radial anti-loosening teeth. In application, the nylon locking ring compensates for the loss of preload through plastic deformation, and the radial anti-loosening teeth keep the nut self-locking during vibration. The double anti-loosening mechanism makes the connection of the reinforcing bolt 2 more reliable.

[0029] Reference Figure 1 and Figure 2 The contact surface between the connecting steel 4 and the H-beam 1 is provided with interlocking shear protrusions. The height of the shear protrusions is one-third of the thickness of the connecting steel 4 plate. In application, the interlocking shear protrusions provide additional shear bearing capacity through mechanical interlocking, reducing the compressive stress on the bolt hole wall. The design of its height being 1 / 3 of the plate thickness balances the processing difficulty and shear performance requirements.

[0030] The working principle of this utility model is as follows: Under dynamic load, the H-beam 1 and connecting steel 4, connected by reinforcing bolts 2 and reinforcing nuts 3, cooperate with the triangular force transmission mechanism to realize multi-directional force transmission in the node area, avoiding the stiffness abruptness problem caused by traditional welding. At the same time, the core energy-dissipating section 601 of the uniform cross-section steel plate of the connecting component can evenly disperse stress, the trapezoidal gradual transition section 602 can reduce stress concentration caused by cross-sectional abruptness, and the flexible characteristics of the elastic connection section 603 can reduce the risk of brittle failure of the node. The three work together to improve the fatigue life of the node. At the same time, the node can absorb energy through deformation under dynamic load, suppress the propagation of microcracks, thereby realizing multi-directional force transmission in the node area, avoiding the stiffness abruptness problem caused by traditional welding, and suppressing the propagation of microcracks.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An optimized structure for high load-bearing capacity bridge nodes, characterized in that: Includes H-beam (1), the H-beam (1) is connected to connecting steel (4) by reinforcing bolts (2) and reinforcing nuts (3), the connecting steel (4) is provided with a first hinge seat (401), the connecting steel (4) is installed with a transverse I-beam (5), and the transverse I-beam (5) is provided with a second hinge seat (501). A connecting member is connected between the first hinge seat (401) and the second hinge seat (501). The connecting member includes a core energy-consuming section (601), a transition section (602), and an elastic connecting section (603). The first hinge seat (401), the second hinge seat (501), and the connecting member form a triangular force transmission mechanism.

2. The optimized structure for high-bearing-capacity bridge nodes according to claim 1, characterized in that: The core energy-consuming section (601) is a steel plate with a uniform cross section, the transition section (602) is a trapezoidal gradient steel plate, and the elastic connecting sections (603) at both ends are connected to the first hinge seat (401) and the second hinge seat (501).

3. The optimized structure for high-bearing-capacity bridge nodes according to claim 1, characterized in that: The apex angle of the triangular force transmission mechanism is 45°-60°, and the axis of the first hinge seat (401) forms an angle of 10°-15° with the center line of the web of the H-beam (1).

4. The optimized structure for high-bearing-capacity bridge nodes according to claim 1, characterized in that: The reinforcing bolt (2) is a double-ended bolt, and the middle part of the shank of the double-ended bolt is provided with an annular pressure relief groove. The threaded part of the double-ended bolt adopts a sawtooth thread.

5. The optimized structure for high-bearing-capacity bridge nodes according to claim 1, characterized in that: The reinforcing nut (3) has a nylon locking ring embedded in it, and the end face of the reinforcing nut (3) is provided with radial anti-loosening teeth.

6. The optimized structure for high-bearing-capacity bridge nodes according to claim 1, characterized in that: The contact surface between the connecting steel (4) and the H-beam (1) is provided with interlocking shear protrusions, the height of which is one-third of the thickness of the connecting steel (4) plate.

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