A shock-absorbing diaphragm component for a bridge structure

Abstract

The present invention discloses a shock-absorbing diaphragm component for a bridge structure, which belongs to the field of bridge seismic technology, and is used to solve the problems of poor integrity, weak energy absorption capacity, easy damage and difficult maintenance and replacement of rigid shock-absorbing diaphragms in multi-piece bridges. The shock-absorbing diaphragm component includes a diaphragm, energy-absorbing bolts and nuts arranged between connecting beams for shock absorption. The diaphragm includes an end plate, a main plate and a sub-plate connected in sequence laterally, and a number of sub-plates are arranged at intervals on one side of the main plate. The grouped diaphragms are plugged in and installed and fixed through energy-absorbing bolts, and nuts are installed on the top and bottom of the energy-absorbing bolts to achieve tight positioning. The present invention utilizes energy-absorbing bolts and matching energy-absorbing threaded tubes to form an energy-absorbing component, which consumes the energy input into the overall structure by external force through metal hysteresis deformation; achieves the purpose of energy absorption and shock absorption; is arranged between connecting beams to improve the integrity of the bridge, and greatly extends the service life of the bridge.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge earthquake resistance, and in particular relates to a shock-absorbing diaphragm component for a bridge structure. Background Art

[0002] In recent years, most of my country's existing simply supported beam bridges have been designed in accordance with JTJ / TB02-012008 "Detailed Rules for Seismic Design of Bridges". Before the promulgation of these rules, beam bridges had varying degrees of insufficient seismic resistance. Initially, these bridges were designed with little consideration for the current severe overload situation in highway transport, and lacked a comprehensive and systematic analysis of the overall mechanical performance of multi-beam bridges. This resulted in a greater risk of structural failure of single beams under the action of overloaded vehicles, leading to bridge collapse accidents.

[0003] There are two main reasons for bridge collapses. The superficial factor is overloaded vehicles; the underlying factor is the poor integrity of the multiple beams, which are unable to bear the load together and do not form a complete force-bearing system. This means that when overloaded trucks act, the vast majority of the load is borne by a single beam, and the synergy of the other beams is small, creating safety hazards for the bridge structure under the influence of overloaded vehicles. In order to simultaneously eliminate the two factors that cause accidents on multi-piece bridges, starting with strengthening the lateral connection of the multi-piece bridge and improving the structural force performance, studying the static characteristics and structural stability of the multi-piece bridge structure is of great significance to improving the reliability of the bridge structure and its durability after long-term use.

[0004] The shock-absorbing diaphragm is a special energy-dissipating and shock-absorbing component, which requires both sufficient bearing capacity and good energy-absorbing capacity. The existing shock-absorbing diaphragm is constructed of reinforced concrete and is installed between beams. This approach, based on the idea of "strong against strong", can indeed strengthen the integrity of multi-beam bridges. However, this will increase the deadweight and stiffness of the bridge structure, leading to increased seismic effects on the structure. In order to resist the impact of earthquakes on the structure, it is necessary to continue to increase the size of the structure and the reinforcement. This cycle continues, increasing the cost of the structure and the reliability of the structural safety performance. At the same time, the construction process is complex, its failure is usually brittle failure, and its energy-absorbing capacity is relatively weak.

[0005] Therefore, seeking a new type of diaphragm structure that can improve structural integrity, consume external force input into the bridge structure energy, and ensure structural safety is a technical problem that needs to be solved urgently in the study of the overall performance of bridge structures. Summary of the Invention

[0006] The purpose of the present invention is to provide a shock-absorbing diaphragm component for a bridge structure to solve the problems of poor integrity, weak energy dissipation capacity, susceptibility to damage and difficulty in maintenance and replacement of rigid shock-absorbing diaphragms in multi-piece bridges.

[0007] In order to solve the above problems, the technical solution of the present invention is:

[0008] A shock-absorbing diaphragm component for a bridge structure includes a diaphragm, energy-absorbing bolts, and nuts for shock absorption, which are arranged between connecting beams. The diaphragm includes an end plate, a main plate, and a sub-plate connected in sequence laterally. Several sub-plates are spaced apart on one side of the main plate. The diaphragms are installed in groups and fixed by energy-absorbing bolts. Nuts are installed at the top and bottom of the energy-absorbing bolts to ensure they are tightly fixed in place.

[0009] Furthermore, a circle of energy-dissipating threaded tubes is provided on the periphery of the energy-dissipating bolts, and the energy-dissipating threaded tubes are clamped between the groups of nuts.

[0010] Furthermore, a plurality of energy-absorbing bolt holes are provided on the split plate, and the energy-absorbing bolt holes on the split plates at the upper and lower positions correspond to each other, and the energy-absorbing bolts pass through them.

[0011] Furthermore, a plurality of anchor bolt holes are provided on the end plate, and the anchor bolts pass through the anchor bolt holes to fix the end plate to the connecting beam.

[0012] Furthermore, the energy-dissipating bolt is made of a first soft steel material, and the energy-dissipating threaded pipe is made of a second soft steel material. The stiffness of the first soft steel material is greater than that of the second soft steel material.

[0013] Furthermore, the diaphragm is made of structural steel used in bridges.

[0014] Furthermore, the energy-dissipating bolts are made of low-alloy high-strength structural steel, and the energy-dissipating threaded pipes are made of carbon structural steel.

[0015] Furthermore, when the strength of the reinforced concrete beam of the superstructure of the bridge structure is C40: the diaphragm is configured with Q370q steel plate, whose tensile strength is 510MPa; the energy-dissipating bolt is configured with Q355 steel plate, whose yield strength is 355MPa; the energy-dissipating threaded pipe is configured with Q215 steel plate, whose yield strength is 215MPa.

[0016] Furthermore, when the strength of the reinforced concrete beam of the superstructure of the bridge structure is C50: the diaphragm is configured with Q500q steel plate, whose tensile strength is 630MPa; the energy-dissipating bolt is configured with Q390 steel plate, whose yield strength is 390MPa; the energy-dissipating threaded pipe is configured with Q235 steel plate, whose yield strength is 235MPa.

[0017] Furthermore, when the strength of the reinforced concrete beam of the superstructure of the bridge structure is C60: the cross diaphragm is configured with Q620q steel plate, whose tensile strength is 720MPa; the energy-dissipating bolt is configured with Q420 steel plate, whose yield strength is 420MPa; the energy-dissipating threaded pipe is configured with Q275 steel plate, whose yield strength is 275MPa.

[0018] The beneficial effects of the present invention are as follows:

[0019] (1) In the present invention, the energy-dissipating bolts, on the one hand, connect the grouped diaphragms, limiting the load on a single beam. Under the design load of the reinforced concrete diaphragms, they are less likely to be damaged and have strong deformation resistance. On the other hand, they consume the energy input into the structure by external forces. When the structure is subjected to a load greater than the design load of the reinforced concrete diaphragms, shear deformation occurs first, consuming the energy input into the structure and preventing structural damage. The energy-dissipating threaded tube is made of metal, and its good metal hysteresis deformation performance can dissipate the energy input into the diaphragms by external forces.

[0020] (2) The present invention introduces the shock absorption concept of energy dissipation and shock absorption technology (i.e., a passive control method that consumes input structural energy through energy dissipation components or energy dissipation devices, effectively reducing the seismic response of the structure and improving the safety factor of the main structure) into the diaphragm components of the bridge structure, solving the problems of poor overall performance and insufficient bearing capacity of the bridge structure when facing overload in the existing technology. Based on this principle, the bridge structure consumes external forces input to the bridge deck such as vehicle loads and deadweight, thereby reducing the damage to the structural components caused by external forces.

[0021] (3) The present invention utilizes energy-absorbing bolts and matching energy-absorbing threaded tubes to form energy-absorbing components, which dissipate the energy inputted into the overall structure by external forces through metal hysteresis deformation, thereby achieving the purpose of energy dissipation and shock absorption. At the same time, each component has a simple structure and is easy to process and replace. Compared with the traditional reinforced concrete diaphragm structure, it has a strong energy dissipation and shock absorption effect, and is installed between connecting beams to improve the integrity of the bridge. Even if a single beam fails structurally under overload, the purpose of maintaining the safety and stability of the overall structure of the bridge can be achieved by replacing the components of the present invention, which can greatly extend the service life of the bridge and has significant engineering significance with significant economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a shock-absorbing diaphragm component for a bridge structure;

[0023] Figure 2 for Figure 1 A top view of

[0024] Figure 3 A top view of a diaphragm in a shock-absorbing diaphragm member for a bridge structure;

[0025] Figure 4 A schematic top view of a diaphragm in a shock-absorbing diaphragm member for a bridge structure;

[0026] Figure 5 A front view of a single diaphragm in a shock-absorbing diaphragm member for a bridge structure;

[0027] Figure 6A side view of a single diaphragm in a shock-absorbing diaphragm member for a bridge structure;

[0028] Figure 7 The figure is a schematic diagram of the installation of energy-absorbing bolts in a shock-absorbing diaphragm member of a bridge structure;

[0029] Figure 8 The diagram is a structural diagram of energy-absorbing bolts and nuts used in a shock-absorbing diaphragm component of a bridge structure.

[0030] The figures are marked as follows: 1-cross partition; 11-end plate; 12-main plate; 13-dividing plate; 14-energy-absorbing bolt hole; 15-anchor bolt hole; 2-energy-absorbing bolt; 21-energy-absorbing threaded pipe; 3-nut; 4-anchor bolt; 5-connecting beam. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention but is merely representative of selected embodiments of the present invention.

[0033] Example

[0034] like Figure 1-8 As shown, a shock-absorbing diaphragm component for a bridge structure includes a diaphragm 1, an energy-absorbing bolt 2, and a nut 3 arranged between connecting beams 5 for shock absorption.

[0035] The diaphragm 1 comprises end plates 11, a main plate 12, and sub-plates 13, which are sequentially connected transversely. Several sub-plates 13 are spaced apart on either side of the main plate 12. The grouped diaphragms 1 are installed by plugging and secured with energy-dissipating bolts 2. Specifically, the sub-plates 13 are provided with several energy-dissipating bolt holes 14, which correspond to each other on the upper and lower sub-plates 13 and pass through them. The end plates 11 are provided with several anchor bolt holes 15, which pass through the anchor bolts to secure the end plates 11 to the coupling beam 5.

[0036] A circle of energy-dissipating threaded tubes 21 are provided around the energy-dissipating bolt 2 . Nuts 3 are installed on the top and bottom of the energy-dissipating bolt 2 to achieve tight positioning. The energy-dissipating threaded tubes 21 are clamped between the groups of nuts 3 .

[0037] In the preparation of components:

[0038] The diaphragm 1 is made of structural steel for bridges.

[0039] The energy dissipation bolt 2 is made of mild steel material 1, and the energy dissipation threaded tube 21 is made of mild steel material 2. The stiffness of mild steel material 1 is greater than that of mild steel material 2. Specifically, the energy dissipation bolt 2 is made of low alloy steel strength structural steel, and the energy dissipation threaded tube 21 is made of carbon structural steel.

[0040] The specific steel plate selection is determined by the strength of the reinforced concrete beams of the bridge superstructure.

[0041] Based on the fact that the strength of reinforced concrete beams in the current bridge superstructure is usually C40, C50 and C60, the material scheme for configuring the shock-absorbing diaphragm components is shown in Table 1:

[0042] Table 1 Material combination of shock-absorbing diaphragm components

[0043]

[0044] Examples 1-3 were respectively processed into components of the present invention according to the steel materials selected in Table 1, and the rest of the structures were the same.

[0045] When installing:

[0046] First, use the anchor bolt holes 15 on the end plate 11 to secure the end plate 11 to the coupling beam 5 by inserting the anchor bolts 4 through the holes 15. This completes the installation of the diaphragm 1 on one side. When installing the diaphragm 1 on the other coupling beam 5, pay attention to the interlocking of the sub-plates 13 and the corresponding position of the energy dissipation bolt holes 14 to facilitate the installation of the energy dissipation component.

[0047] The energy dissipation threaded tube 21 is sleeved on the outer periphery of the energy dissipation bolt 2 by means of threads, and then screwed into the energy dissipation bolt hole 14, and fixed in place with nuts 3 at the top and bottom.

[0048] That completes the overall installation of the present invention.

[0049] In use:

[0050] The seismic energy is mainly consumed by the energy-absorbing bolts 2 . The two sub-plates 13 are relatively displaced under the internal force transmitted by the beam. Since the energy-absorbing bolts 2 connect the two sub-plates 13 , the relative movement of the sub-plates 13 is restricted.

[0051] When the external force is relatively small, the rigidity of the energy-absorbing bolt 2 is sufficient to support the split plate 13 without displacement, and the energy-absorbing bolt 2 itself does not undergo plastic deformation.

[0052] When the bridge deck is subjected to general vehicle loads, the split plate 13 moves up and down, and the threads on the surface of the energy-absorbing bolt 2 are squeezed and deformed under the extrusion of the split plate 13. First, the energy-absorbing threaded tube 21 consumes energy in the process of hysteresis deformation, and then the energy-absorbing bolt 2 consumes energy.

[0053] During earthquakes, overloads or large external forces, the displacement of the two sub-plates 13 is too large, and the deformation of the energy-absorbing threaded tube 21 and the thread deformation on the surface of the energy-absorbing bolt 2 are insufficient to reduce the large deformation of the coupling beam. Under the action of the connecting plate, the energy-absorbing bolt undergoes shear deformation, further consuming energy and achieving the purpose of shock absorption.

[0054] As can be seen from the above different engineering application scenarios, when the present invention is subjected to external force, there are three layers of deformation to resist the external force and dissipate energy, namely: energy-dissipating threaded pipe 21, energy-dissipating bolt 2, and plug-in splitter plate 13. Therefore, the shock absorption performance of the overall structure is greatly enhanced.

[0055] In engineering applications:

[0056] The shock-absorbing diaphragm is installed between the box beams or T beams, connecting the individual beams transversely, playing the role of transverse connection of the beams, making the bridge superstructure a whole, and avoiding the bridge collapse accident caused by the stress of a single plate.

[0057] The shock-absorbing diaphragm of the present invention can be installed on the following two types of bridges:

[0058] 1. For the reinforcement of existing bridges, for areas where reinforced concrete diaphragms are already damaged, shock-absorbing diaphragms can be installed in their place. The huge lateral forces between the beams are consumed by the shock-absorbing diaphragms, making the beams a whole without causing stress on a single plate. At the same time, the energy dissipation and shock-absorbing technology is applied to prevent the diaphragms from suffering brittle failure.

[0059] 2. For newly built bridges, the diaphragm can be installed at the designed location. The lateral forces between the beams can be analyzed using bridge structure calculation and analysis software to select the appropriate size of the shock-absorbing diaphragm for installation. The diaphragm is connected to the beams via anchor bolts using the connecting plate.

[0060] The bridge connected by the structure of the present invention has greatly enhanced integrity due to its elastic connection method. When subjected to external force, not only a single beam bridge is subjected to the force, but the load capacity of adjacent or even nearby beam bridges can be mobilized to bear the load together, thereby greatly enhancing the load capacity of the bridge structure.

[0061] Whether the present invention is applied to a new bridge or to repair a structural failure site of an existing single-piece beam, regular inspections are performed during the later maintenance process to observe the status of the energy-consuming threaded pipe 21 and the energy-consuming bolt 2, and corresponding components are replaced when damage occurs.

[0062] Since the cost of the energy-consuming threaded pipe 21 and the energy-consuming bolt 2 is extremely low and the maintenance and replacement are convenient, the service life of the bridge can be greatly extended. Therefore, in engineering practice, it has a very significant economic value.

Claims

1. A shock-absorbing diaphragm member for a bridge structure, comprising a diaphragm (1) disposed between connecting beams (5) for shock absorption, characterized in that: The transverse diaphragm (1) comprises an end plate (11), a main plate (12), and a sub-plate (13) which are connected in sequence transversely. The sub-plates (13) are in plurality and are arranged at intervals on one side of the main plate (12). The transverse diaphragms (1) are installed in groups by plugging and penetrated by energy-dissipating bolts (2). The top and bottom of the energy-dissipating bolts (2) are both provided with nuts (3) for positioning. The periphery of the energy-dissipating bolts (2) is provided with a circle of energy-dissipating threaded tubes (21), and the energy-dissipating threaded tubes (21) are clamped between the nuts (3) in the group. The energy-dissipating bolts (2) are made of a first soft steel material, and the energy-dissipating threaded tubes (21) are made of a second soft steel material. The stiffness of the first soft steel material is greater than the stiffness of the second soft steel material. The split plate (13) is provided with a plurality of energy-absorbing bolt holes (14), and the energy-absorbing bolt holes (14) on the split plates (13) at the upper and lower positions correspond to each other, and energy-absorbing bolts (2) pass through them; the end plate (11) is provided with a plurality of anchor bolt holes (15), and the anchor bolts pass through the anchor bolt holes (15) to fix the end plate (11) to the connecting beam (5).

2. The shock-absorbing diaphragm member for a bridge structure according to claim 1, characterized in that: The transverse diaphragm (1) is made of structural steel for bridges.

3. A shock-absorbing diaphragm member for a bridge structure according to claim 1 or 2, characterized in that: The energy-dissipating bolt (2) is made of low-alloy high-strength structural steel, and the energy-dissipating threaded tube (21) is made of carbon structural steel.

4. The shock-absorbing diaphragm member for a bridge structure according to claim 3, characterized in that: When the strength of the reinforced concrete beam of the upper structure of the bridge structure is C40: the diaphragm (1) is configured with a Q370q steel plate, whose tensile strength is 510 MPa; the energy-absorbing bolt (2) is configured with a Q355 steel plate, whose yield strength is 355 MPa; and the energy-absorbing threaded pipe (21) is configured with a Q215 steel plate, whose yield strength is 215 MPa.

5. The shock-absorbing diaphragm member for a bridge structure according to claim 3, characterized in that: When the strength of the reinforced concrete beam of the upper structure of the bridge structure is C50: the diaphragm (1) is configured with a Q500q steel plate, whose tensile strength is 630 MPa; the energy-absorbing bolt (2) is configured with a Q390 steel plate, whose yield strength is 390 MPa; and the energy-absorbing threaded pipe (21) is configured with a Q235 steel plate, whose yield strength is 235 MPa.

6. The shock-absorbing diaphragm member for a bridge structure according to claim 3, characterized in that: When the strength of the reinforced concrete beam of the upper structure of the bridge structure is C60: the transverse diaphragm (1) is configured with a Q620q steel plate, whose tensile strength is 720 MPa; the energy-absorbing bolt (2) is configured with a Q420 steel plate, whose yield strength is 420 MPa; and the energy-absorbing threaded pipe (21) is configured with a Q275 steel plate, whose yield strength is 275 MPa.

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