A multi-directional beam-falling prevention device and construction method thereof

Abstract

The present invention discloses a multi-directional anti-falling beam device and a construction method thereof, wherein the multi-directional anti-falling beam device is composed of an anti-falling beam device body, a top longitudinal rotor, a top transverse rotor, a bottom transverse rotor, and a bottom longitudinal rotor, wherein the top of the anti-falling beam device body is connected to the top transverse rotor through a pin shaft, the bottom is connected to the bottom longitudinal rotor through a pin shaft, the top transverse rotor is connected to the top longitudinal rotor through a pin shaft, the bottom longitudinal rotor is connected to the bottom transverse rotor through a pin shaft, the top longitudinal rotor is connected to the bridge superstructure through an embedded steel plate, and the bottom transverse rotor is connected to the bridge substructure through an embedded steel plate. The multi-directional anti-falling beam device has a simple structure and clear force, is suitable for limiting the adverse relative displacement between the upper and lower structures of the bridge in all directions, has a multi-directional anti-falling beam function, and can reduce the risk of falling beams of the bridge under earthquake action.

Description

Technical Field

[0001] The invention relates to a bridge beam-falling prevention device, in particular to a multi-directional beam-falling prevention device and a construction method thereof. Background Art

[0002] Falling beams are the most frequent, most serious, and most difficult to repair form of bridge damage after an earthquake. my country's seismic design specifications for highway bridges, urban bridges, rail transit bridges, and railway bridges all require that bridges be designed to prevent falling beams.

[0003] The anti-falling beam device is the key to realizing the anti-falling beam function of the bridge. Commonly used anti-falling beam devices include cable anti-falling beam devices, chain anti-falling beam devices, anti-falling beam blocks, etc. Usually these anti-falling beam devices are used as seismic structural measures, and their design parameters cannot be determined by calculation. With the continuous advancement of seismic analysis methods, it is now possible to use the anti-falling beam device as part of the seismic calculation and obtain its mechanical indicators through quantitative calculation. In contrast, the commonly used anti-falling beam devices cannot be accurately simulated because of their unclear constitutive relations. At the same time, these anti-falling beam devices can often only limit the displacement of the bridge in a specific direction and do not have a multi-directional anti-falling beam function. However, earthquake action is non-directional, and a single-direction limit alone is not enough to achieve the anti-falling beam function. Therefore, the seismic design of bridges requires an anti-falling beam device with a clear constitutive relationship and a multi-directional anti-falling beam function.

[0004] In summary, it is necessary to develop an anti-falling beam device with a clear constitutive relationship and multi-directional anti-falling beam function, which can adapt to the uncertainty of the direction of earthquake action and meet the accuracy of seismic analysis. Summary of the invention

[0005] In view of the problems of unclear constitutive relationship and single limiting direction in the existing anti-beam falling device, the present invention discloses a multi-directional anti-beam falling device and a construction method thereof based on the mechanical behavior of the bridge structure, which can be widely applicable to the anti-beam falling design of bridges.

[0006] The earthquake damage revealed that the fundamental reason for the beam drop is the uncontrollable relative displacement between the bridge superstructure and the substructure. The relative displacement includes both the longitudinal and transverse relative displacements, as well as the vertical relative displacement. Therefore, the core of the anti-drop beam design is to limit the unfavorable relative displacement between the bridge superstructure and the substructure in all directions. The seismic analysis shows that the anti-drop beam device participates in the force for a very short time, and the instantaneous force is very large, which is unfavorable to the force of the substructure. Therefore, in order to reduce the above-mentioned forces and effectively realize the anti-drop beam function, it is necessary to appropriately reduce the stiffness of the anti-drop beam device. From the perspective of multi-directional limiting, the bridge superstructure and the substructure need to be connected, and the conventional anti-drop beam block is not applicable; from the perspective of reducing stiffness, the anti-drop beam device should use elastic materials. Therefore, a multi-directional anti-drop beam device based on a spring is proposed.

[0007] In order to solve the above technical problems, the technical solution adopted in this application is:

[0008] A multi-directional anti-falling beam device, comprising: an anti-falling beam device body, a top longitudinal rotor, a top transverse rotor, a bottom transverse rotor and a bottom longitudinal rotor;

[0009] The anti-falling beam device body includes a spring, an upper stacked steel plate group, a lower stacked steel plate group, a steel rod, an anchor plate, a steel rod nut, a steel rod gasket, a sleeve and a sleeve sealing plate; the upper stacked steel plate group includes a tensile steel plate and a pressure steel plate stacked up and down, and the upper stacked steel plate group can be slidably arranged on the upper part of the sleeve; the lower stacked steel plate group includes a pressure steel plate and a tensile steel plate stacked up and down, and the lower stacked steel plate group can be slidably arranged on the lower part of the sleeve, and the steel rod passes through the tensile steel plate and the pressure steel plate of the upper / lower stacked steel plate group in sequence and is fixed on the pressure steel plate of the lower / upper stacked steel plate group; the spring is wound around the outside of the steel rod between the two pressure steel plates, and the two anchor plates are respectively fixed on the tensile steel plates of the upper stacked steel plate group and the lower stacked steel plate group;

[0010] The top of the anti-falling beam device body is connected to the top transverse rotor through a pin shaft B, and the bottom is connected to the bottom longitudinal rotor through a pin shaft D; the top transverse rotor is connected to the top longitudinal rotor through a pin shaft A; the bottom longitudinal rotor is connected to the bottom transverse rotor through a pin shaft C;

[0011] The top longitudinal rotor is connected to the upper structure of the bridge through a pre-embedded steel plate; the bottom transverse rotor is connected to the lower structure of the bridge through a pre-embedded steel plate.

[0012] Furthermore, the top transverse rotor includes an ear plate B1, a top conversion steel plate B, an ear plate B2, a pin B, a nut B and a gasket B; the upper anchor plate extends upward to the lower edge of the top conversion steel plate B, and the pin B passes through the downwardly extending ear plate B2 and the anchor plate and is fixed by the nut B and the gasket B; the top conversion steel plate B is vertically fixedly connected to the ear plate B1 and the ear plate B2 respectively.

[0013] Furthermore, the top longitudinal rotor includes a top fixed steel plate A, an ear plate A, a pin A, a nut A and a gasket A; the top fixed steel plate and the ear plate A are vertically fixed, and the pin A passes through the upwardly extending ear plate B1 and the ear plate A and is fixed by the nut A and the gasket A.

[0014] Furthermore, the bottom longitudinal rotor includes an ear plate D1, a bottom conversion steel plate, an ear plate D2, a pin D, a nut D and a gasket D; the lower anchor plate extends downward to the side edge of the bottom conversion steel plate, and the pin D passes through the ear plate D2 and the anchor plate extending to the right and is fixed by the nut D and the gasket D; the bottom conversion steel plate is vertically fixedly connected to the ear plate D1 and the ear plate D2 respectively.

[0015] Furthermore, the bottom transverse rotor includes a bottom fixed steel plate, an ear plate C, a pin C, a nut C and a gasket C; the bottom fixed steel plate and the ear plate C are vertically fixed, and the pin C passes through the ear plate D1 extending to the left and the ear plate C and is fixed by the nut C and the gasket C.

[0016] Furthermore, the steel rod is fixed to the corresponding pressure-bearing steel plate by welding, and is bolted to the corresponding tension-bearing steel plate by bolting.

[0017] Furthermore, the load-displacement curve of the multi-directional anti-falling beam device is:

[0018]

[0019] Among them, F is the axial force of the multi-directional anti-drop beam device, u is the axial displacement of the multi-directional anti-drop beam device, u0 is the initial distance between the spring and the two pressure-bearing steel plates, and k is the compression stiffness of the spring.

[0020] Furthermore, the sleeve is sleeved outside the spring, the pressure-bearing steel plate and the tension-bearing steel plate, and the sleeve sealing plate and the sleeve are welded.

[0021] Furthermore, the axes of the pin A and the pin D are parallel to each other and in a vertical plane; the axis of the pin B is perpendicular to the vertical plane; and the axis of the pin C is parallel to the vertical plane and perpendicular to the axis of the pin B.

[0022] On the other hand, the present application also seeks to protect a construction method of a multi-directional beam-falling prevention device as described in one of the aforementioned aspects, comprising the following steps:

[0023] Step 1: Prefabricate the multi-directional anti-drop beam device in the factory; first, weld the two groups of steel bars to the corresponding pressure-bearing steel plates, and weld the two groups of anchor plates to the corresponding tension-bearing steel plates; second, pass the two groups of steel bars through the spring, the other group of pressure-bearing steel plates, and the tension-bearing steel plates of this group in sequence, and then anchor them with the steel bar nuts and steel bar washers of this group; third, install the sleeve and fix it with the same group of pressure-bearing steel plates and tension-bearing steel plates through rivets, and weld the two ends to the sleeve sealing plates to form the anti-drop beam device body; finally, connect the anti-drop beam device body with the top longitudinal rotor, the top transverse rotor, the bottom transverse rotor, and the bottom longitudinal rotor through corresponding pins, nuts, and washers as a whole to form a multi-directional anti-drop beam device;

[0024] Step 2: Install the multi-directional anti-falling beam device on site; first, embed steel plates at the bottom of the bridge superstructure and the sides of the bridge substructure; second, connect the top longitudinal rotor to the embedded steel plate at the bottom of the bridge superstructure by welding or anchor bolts; finally, connect the bottom transverse rotor to the embedded steel plate on the side of the bridge substructure by welding or anchor bolts to complete the installation of the multi-directional anti-falling beam device.

[0025] The invention has a simple structure and clear force, is suitable for limiting the adverse relative displacement between the upper and lower structures of the bridge in various directions, has a multi-directional beam-falling prevention function, and can reduce the beam-falling risk of the bridge under earthquake action. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a large-scale installation drawing of a multi-directional anti-falling beam device.

[0028] Figure 2 The figure is a structural layout diagram of a multi-directional anti-falling beam device.

[0029] Figure 3 This is an AA cross-sectional view of a multi-directional beam-falling prevention device.

[0030] Figure 4 It is a BB cross-sectional view of a multi-directional anti-falling beam device.

[0031] Figure 5 It is a CC cross-sectional view of a multi-directional anti-falling beam device.

[0032] Figure 6 It is a DD cross-sectional view of a multi-directional anti-falling beam device.

[0033] Figure 7 This is an EE cross-sectional view of a multi-directional beam-falling prevention device. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution 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 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 creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-7 , a multi-directional anti-falling beam device of the present invention comprises: an anti-falling beam device body, a top longitudinal rotor, a top transverse rotor, a bottom transverse rotor and a bottom longitudinal rotor;

[0036] The anti-falling beam device body includes a spring 11, an upper stacked steel plate group, a lower stacked steel plate group, a steel rod 14, an anchor plate 15, a steel rod nut 16, a steel rod gasket 17, a sleeve 18 and a sleeve sealing plate 19; the upper stacked steel plate group includes a tensile steel plate 13 and a pressure steel plate 12 stacked up and down, and the upper stacked steel plate group can be slidably arranged on the upper part of the sleeve 18; the lower stacked steel plate group includes a pressure steel plate 12 and a tensile steel plate 13 stacked up and down, and the lower stacked steel plate group can be slidably arranged on the lower part of the sleeve 18, and the steel rod 14 passes through the tensile steel plate 13 and the pressure steel plate 12 of the upper / lower stacked steel plate group in sequence and is fixed on the pressure steel plate 12 of the lower / upper stacked steel plate group; the spring 11 is wound around the outside of the steel rod 14 between the two pressure steel plates 12, and the two anchor plates 15 are respectively fixed on the tensile steel plates 13 of the upper stacked steel plate group and the lower stacked steel plate group;

[0037] The top of the anti-falling beam device body is connected to the top transverse rotor through a pin shaft B34, and the bottom is connected to the bottom longitudinal rotor through a pin shaft D54; the top transverse rotor is connected to the top longitudinal rotor through a pin shaft A23; the bottom longitudinal rotor is connected to the bottom transverse rotor through a pin shaft C43;

[0038] The top longitudinal rotor is connected to the bridge superstructure 2 through a pre-embedded steel plate; the bottom transverse rotor is connected to the bridge substructure 4 through a pre-embedded steel plate.

[0039] In an embodiment of the present application, the top transverse rotor includes an ear plate B1 31, a top conversion steel plate B32, an ear plate B2 33, a pin B34, a nut B35 and a gasket B36; the upper anchor plate 15 extends upward to the lower edge of the top conversion steel plate B32, and the pin B34 passes through the downwardly extending ear plate B2 33 and the anchor plate 15 and is fixed by a nut B35 and a gasket B36; the top conversion steel plate B32 is vertically fixedly connected to the ear plate B1 31 and the ear plate B2 33 respectively.

[0040] In an embodiment of the present application, the top longitudinal rotor includes a top fixed steel plate A21, an ear plate A22, a pin A23, a nut A24 and a gasket A25; the top fixed steel plate 21 and the ear plate A22 are vertically fixed, and the pin A23 passes through the upwardly extending ear plate B131 and the ear plate A22 and is fixed by a nut A24 and a gasket A25.

[0041] In an embodiment of the present application, the bottom longitudinal rotor includes an ear plate D1 51, a bottom conversion steel plate 52, an ear plate D2 53, a pin D54, a nut D55 and a gasket D56; the lower anchor plate 15 extends downward to the side edge of the bottom conversion steel plate 52, and the pin D54 passes through the ear plate D2 53 extending to the right and the anchor plate 15 and is fixed by a nut D55 and a gasket D56; the bottom conversion steel plate 52 is vertically fixedly connected to the ear plate D1 51 and the ear plate D2 53 respectively.

[0042] In an embodiment of the present application, the bottom transverse rotor includes a bottom fixed steel plate 41, an ear plate C42, a pin C43, a nut C44 and a gasket C45; the bottom fixed steel plate 41 and the ear plate C42 are vertically fixed, and the pin C43 passes through the ear plate D1 51 extending to the left and the ear plate C42 and is fixed by the nut C44 and the gasket C45.

[0043] In the embodiments of the present application, the steel rod is welded to the corresponding pressure steel plate and bolted to the corresponding tension steel plate; the anchor plate is welded to the corresponding tension steel plate; the sleeve is sleeved outside the spring, pressure steel plate and tension steel plate; the sleeve sealing plate and the sleeve are welded.

[0044] In the embodiments of the present application, the pressure-bearing steel plates and the tension-bearing steel plates are all perforated steel plates for the steel rods to pass through; the anchor plate, ear plate A, ear plate B1, ear plate B2, ear plate C, ear plate D1, and ear plate D2 are all perforated steel plates for the pins to pass through; the sleeve sealing plate is a perforated steel plate for the anchor plate to pass through.

[0045] In the embodiment of the present application, the load displacement curve of the multi-directional anti-falling beam device is Among them, F is the axial force of the multi-directional anti-drop beam device, u is the axial displacement of the multi-directional anti-drop beam device, u0 is the initial distance between the spring and the two pressure-bearing steel plates, and k is the compression stiffness of the spring.

[0046] In an embodiment of the present application, a construction method of a multi-directional anti-falling beam device is also included, and the steps are as follows:

[0047] Step 1: Prefabricate the multi-directional anti-drop beam device in the factory. First, weld the two groups of steel bars to the corresponding pressure-bearing steel plates, and weld the two groups of anchor plates to the corresponding tension-bearing steel plates; second, pass the two groups of steel bars through the spring, the other group of pressure-bearing steel plates, and the tension-bearing steel plates of this group in turn, and then anchor them with the steel bar nuts and steel bar washers of this group; third, install the sleeve and fix it with the same group of pressure-bearing steel plates and tension-bearing steel plates through rivets, and weld the two ends to the sleeve sealing plate to form the main body of the anti-drop beam device; finally, connect the main body of the anti-drop beam device with the top longitudinal rotor, the top transverse rotor, the bottom transverse rotor, and the bottom longitudinal rotor through the corresponding pins, nuts, and washers to form a multi-directional anti-drop beam device.

[0048] Step 2: Install the multi-directional anti-falling beam device on site. First, embed steel plates at the bottom of the bridge superstructure and the sides of the bridge substructure; second, connect the top longitudinal rotor to the embedded steel plate at the bottom of the bridge superstructure by welding or anchor bolts; finally, connect the bottom transverse rotor to the embedded steel plate on the side of the bridge substructure by welding or anchor bolts to complete the installation of the multi-directional anti-falling beam device.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-directional beam-falling prevention device, characterized in that: include: The anti-fall beam device body, the top longitudinal rotor, the top transverse rotor, the bottom transverse rotor and the bottom longitudinal rotor; The anti-falling beam device body comprises a spring (11), an upper stacked steel plate group, a lower stacked steel plate group, a steel rod (14), an anchor plate (15), a steel rod nut (16), a steel rod gasket (17), a sleeve (18) and a sleeve sealing plate (19); the upper stacked steel plate group comprises a first tensile steel plate (13) and a first pressure steel plate (12) stacked up and down, and the upper stacked steel plate group is slidably arranged on the upper part of the sleeve (18); the lower stacked steel plate group comprises a second pressure steel plate (12A) and a second tensile steel plate (13A) stacked up and down, and the lower stacked steel plate group is slidably arranged on the lower part of the sleeve (18), and the steel rod (14) passes through the upper stacked steel plate group in sequence. The first tensile steel plate (13) and the first pressure-bearing steel plate (12) of the steel plate group are fixed to the second pressure-bearing steel plate (12A) of the lower stacked steel plate group, and another group of steel rods (14) are successively passed through the second tensile steel plate (13A) and the second pressure-bearing steel plate (12A) of the lower stacked steel plate group and then fixed to the first pressure-bearing steel plate (12) of the upper stacked steel plate group; the spring (11) is wound around the outside of the steel rod (14) between the first pressure-bearing steel plate (12) and the second pressure-bearing steel plate (12A), and two anchor plates (15) are respectively fixed to the first tensile steel plate (13) and the second tensile steel plate (13A) of the upper stacked steel plate group and the lower stacked steel plate group; The top of the anti-falling beam device body is connected to the top transverse rotor via a pin shaft B (34), and the bottom is connected to the bottom longitudinal rotor via a pin shaft D (54); the top transverse rotor is connected to the top longitudinal rotor via a pin shaft A (23); and the bottom longitudinal rotor is connected to the bottom transverse rotor via a pin shaft C (43); The top longitudinal rotor is connected to the bridge superstructure (2) via a pre-embedded steel plate; the bottom transverse rotor is connected to the bridge substructure (4) via a pre-embedded steel plate; The load-displacement curve of the multi-directional anti-falling beam device (1) is: ； in, is the axial force of the multi-directional anti-falling beam device (1), is the axial displacement of the multi-directional anti-falling beam device (1), is the initial distance between the spring (11) and the two pressure-bearing steel plates, is the compression stiffness of the spring (11).

2. A multi-directional beam-falling prevention device according to claim 1, characterized in that: The top transverse rotor comprises an ear plate B1 (31), a top conversion steel plate B (32), an ear plate B2 (33), a pin B (34), a nut B (35) and a gasket B (36); the upper anchor plate (15) extends upward to the lower edge of the top conversion steel plate B (32); the pin B (34) passes through the downwardly extending ear plate B2 (33) and the anchor plate (15) and is fixed by the nut B (35) and the gasket B (36); the top conversion steel plate B (32) is vertically fixedly connected to the ear plate B1 (31) and the ear plate B2 (33) respectively.

3. A multi-directional beam-falling prevention device according to claim 2, characterized in that: The top longitudinal rotor comprises a top fixed steel plate A (21), an ear plate A (22), a pin shaft A (23), a nut A (24) and a gasket A (25); the top fixed steel plate A (21) and the ear plate A (22) are vertically fixed, and the pin shaft A (23) passes through the ear plate B1 (31) and the ear plate A (22) extending upward and is then fixed by the nut A (24) and the gasket A (25).

4. A multi-directional beam-falling prevention device according to claim 3, characterized in that: The bottom longitudinal rotor comprises an ear plate D1 (51), a bottom conversion steel plate (52), an ear plate D2 (53), a pin shaft D (54), a nut D (55) and a gasket D (56); the lower anchor plate (15) extends downward to the side edge of the bottom conversion steel plate (52); the pin shaft D (54) passes through the ear plate D2 (53) and the anchor plate (15) extending to the right and is fixed by the nut D (55) and the gasket D (56); the bottom conversion steel plate (52) is respectively vertically fixedly connected to the ear plate D1 (51) and the ear plate D2 (53).

5. A multi-directional beam-falling prevention device according to claim 4, characterized in that: The bottom transverse rotor comprises a bottom fixing steel plate (41), an ear plate C (42), a pin C (43), a nut C (44) and a gasket C (45); the bottom fixing steel plate (41) and the ear plate C (42) are fixed vertically, and the pin C (43) passes through the ear plate D1 (51) extending to the left and the ear plate C (42) and is fixed by the nut C (44) and the gasket C (45).

6. A multi-directional beam-falling prevention device according to any one of claims 1 to 5, characterized in that: The steel rod (14) is fixed to the corresponding pressure-bearing steel plate by welding, and is bolted to the corresponding tension-bearing steel plate by bolting.

7. A multi-directional beam-falling prevention device according to any one of claims 1 to 5, characterized in that: The sleeve (18) is sleeved outside the spring (11), the pressure-bearing steel plate, and the tension-bearing steel plate, and the sleeve sealing plate (19) and the sleeve (18) are welded.

8. A multi-directional beam-falling prevention device according to any one of claims 1 to 5, characterized in that: The axes of the pin A (23) and the pin D (54) are parallel to each other and are in a vertical plane; the axis of the pin B (34) is perpendicular to the vertical plane; and the axis of the pin C (43) is parallel to the vertical plane and perpendicular to the axis of the pin B (34).

9. The construction method of a multi-directional beam-falling prevention device according to claim 5, characterized in that: The following steps are involved: The first step: prefabricate the multi-directional anti-falling beam device (1) in the factory; first, weld the two groups of steel bars (14) to the corresponding pressure-bearing steel plates, and weld the two groups of anchor plates (15) to the corresponding tension-bearing steel plates; second, pass the two groups of steel bars (14) through the spring (11), the other group of pressure-bearing steel plates, and the tension-bearing steel plates of the current group in sequence, and then anchor them with the steel bar nuts (16) and steel bar washers (17) of the current group; third, install the sleeve (18) and fix it with the same group of pressure-bearing steel plates and tension-bearing steel plates by rivets, and weld the two ends to the sleeve sealing plates (19) to form the anti-falling beam device body; finally, connect the anti-falling beam device body with the top longitudinal rotor, the top transverse rotor, the bottom transverse rotor, and the bottom longitudinal rotor by corresponding pins, nuts, and washers to form a whole, so as to form the multi-directional anti-falling beam device (1); Step 2: Install the multi-directional anti-falling beam device (1) on site; first, pre-embed steel plates at the bottom of the bridge superstructure (2) and the side of the bridge substructure (4); second, connect the top longitudinal rotor to the pre-embedded steel plate at the bottom of the bridge superstructure (2) by welding or anchor bolts; finally, connect the bottom transverse rotor to the pre-embedded steel plate at the side of the bridge substructure (4) by welding or anchor bolts, and complete the installation of the multi-directional anti-falling beam device (1).

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