An earthquake-proof beam-dropping structure and plate-beam system suitable for multi-span plate-beam bridges

Abstract

The present invention provides an earthquake-proof beam-dropping structure suitable for a multi-span plate-girder bridge, comprising a plurality of plate-girders connected in sequence and a support arranged below the plate-girders, the earthquake-proof beam-dropping structure also comprising a connecting seat plate structure located at the connecting end of two adjacent plate-girders; the connecting seat plate structure comprises a lower seat plate and an upper seat plate located above the lower seat plate; a transverse limiting tooth is fixedly arranged on the upper surface of the lower seat plate bearing the upper seat plate, a buffer block is sleeved on the transverse limiting tooth, and a slide groove arranged along the bridge direction for installing the transverse limiting tooth and the buffer block is provided on the lower surface of the upper seat plate facing the lower seat plate; a buffer plate is filled between two adjacent plate-girders, and a mounting hole for the transverse limiting tooth and the buffer block to pass through is provided on the buffer plate. The present invention can significantly reduce the incidence of earthquake beam-dropping, and has the functions of shock absorption, energy dissipation, and deformation prevention.

Description

Technical Field

[0001] The invention relates to the field of beam bridges, and in particular to an earthquake-proof drop beam structure and a plate beam system suitable for multi-span plate beam bridges. Background Art

[0002] In recent years, there have been many destructive earthquakes across the country and even around the world, all of which have caused very heavy losses of life and property. Among them, bridge projects have been severely damaged in earthquakes, especially some beam-falling earthquake damage, which directly cuts off the transportation lifeline in the earthquake-stricken area, making it difficult to carry out disaster relief work in a timely manner after the earthquake. Especially in some high-intensity areas, bridges will experience large longitudinal displacements under the action of earthquakes. When the displacement exceeds the allowable value, it will cause the upper structure to collide or beam-falling earthquake damage.

[0003] In order to solve the above technical problems, the Chinese invention patent application with publication number CN106567325A discloses a combined anti-falling beam and collision device, including a cap beam, a plate rubber bearing and a bridge superstructure; the plate rubber bearing is fixed on the cap beam through a bearing pad and supported under the bridge superstructure; a plurality of rigidly connected diaphragms are arranged at the beam ends of the bridge superstructure, and the diaphragms at the adjacent beam ends of the two span bridge superstructures correspond to each other, and each group of corresponding diaphragms are connected by energy-absorbing components and cables. Although this patent can limit the relative deformation of the bridge superstructure to a certain extent and reduce the possibility of falling beams, it connects each group of corresponding diaphragms by energy-absorbing components and cables, which not only relies too much on the material, has low durability and poor earthquake resistance, but also cannot effectively deal with the earthquake deformation displacement in the transverse direction of the bridge. Therefore, it cannot significantly reduce the incidence of earthquake falling beams.

[0004] In view of this, it is necessary to provide an earthquake-proof beam-dropping structure suitable for multi-span slab girder bridges to solve or at least alleviate the above-mentioned defects. Summary of the invention

[0005] The main purpose of the present invention is to provide an anti-seismic beam-falling structure suitable for multi-span slab-girder bridges, aiming to solve the technical problem that the existing technology cannot significantly reduce the incidence of earthquake beam-falling.

[0006] To achieve the above object, the present invention provides an earthquake-proof beam drop structure suitable for a multi-span plate beam bridge, comprising a plurality of plate beams connected in sequence and a support arranged below the plate beams, the earthquake-proof beam drop structure also comprising a connecting seat plate structure located at the connecting ends of two adjacent plate beams;

[0007] Wherein, the connecting seat plate structure comprises a lower seat plate and an upper seat plate located above the lower seat plate, the lower seat plate is integrally formed and arranged at the lower part of the connecting end of one of the two adjacent plate beams, the upper seat plate is integrally formed and arranged at the upper part of the connecting end of the other of the two adjacent plate beams, and when the two adjacent plate beams are butt-jointed, the upper seat plate is placed above the lower seat plate to butt-join and fix the two adjacent plate beams;

[0008] A transverse limiting tooth is fixedly provided on the upper surface of the lower seat plate that supports the upper seat plate, a buffer block is sleeved on the transverse limiting tooth, and a sliding groove arranged along the bridge direction for installing the transverse limiting tooth and the buffer block is opened on the lower surface of the upper seat plate facing the lower seat plate;

[0009] A buffer plate is filled between two adjacent plate beams, and a mounting hole is provided on the buffer plate for the transverse limiting teeth and the buffer block to pass through.

[0010] Furthermore, a fixing groove is concavely provided on the upper surface of the lower seat plate, and the bottom end of the transverse limiting tooth is fixed in the fixing groove.

[0011] Furthermore, the transverse limiting tooth is cylindrical, and the buffer block is provided with a cylindrical through hole for the transverse limiting tooth to pass through vertically.

[0012] Furthermore, the buffer plate is in a broken line shape, and the broken line-shaped buffer plate includes a first vertical buffer portion, a horizontal buffer portion, and a second vertical buffer portion which are arranged in sequence; wherein the first vertical buffer portion is filled between the upper seat plate and the connecting end portion, the horizontal buffer portion is filled between the upper seat plate and the lower seat plate, and the second vertical buffer portion is filled between the lower seat plate and the connecting end portion.

[0013] Furthermore, the second vertical buffer portion of the buffer plate is fixedly connected to the lower seat plate by means of an adhesive material.

[0014] Furthermore, the buffer plate is provided with the mounting hole in the horizontal buffer portion, and the cross section of the mounting hole is not smaller than the cross section of the slide groove.

[0015] Furthermore, the sliding groove provided on the upper seat plate extends to an extending end of the upper seat plate.

[0016] Furthermore, the buffer plate and the buffer block are both made of rubber.

[0017] Further, when the plate beam is a starting beam, the starting end of the starting beam is a vertical section, and the other end is the connecting end integrally formed with the lower seat plate;

[0018] When the plate beam is the last frame beam, the last frame end of the last frame beam is a vertical section, and the other end is the connecting end portion integrally formed with the upper seat plate;

[0019] When the plate beam is an intermediate beam, one end of the intermediate beam is the connecting end portion integrally formed with the upper seat plate, and the other end is the connecting end portion integrally formed with the lower seat plate;

[0020] When the middle beam is a folded beam, both ends of the folded beam are the connecting ends integrally formed with the upper seat plate.

[0021] The present invention also provides a plate-beam system, comprising the earthquake-proof drop-beam structure as described in any one of the above items.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] The present invention can significantly reduce the incidence of beam falling due to earthquakes, and has the functions of shock absorption, energy dissipation, and deformation prevention; by arranging the connecting seat plate structure, not only can the deformation and displacement of the plate beam in the longitudinal and transverse directions of the bridge be effectively avoided, and the dependence on materials is low, but also the durability is very good, which is equivalent to the service life of the plate beam body; by arranging the supports, under normal conditions, the supports can be used to bear the loads of multi-span plate beam bridges in the horizontal and vertical directions; by arranging the upper and lower seat plates, it is possible to cope with earthquake deformation and displacement in the longitudinal direction of the bridge. When the bridge deck is displaced as a whole, one end of the plate beam bridge is separated from the support. Since the upper and lower seat plates at the adjacent plate beam ends are matched, To form a temporary support to prevent the beam from falling, and when the bridge deck is displaced and cracked as a whole, the upper seat plate and the lower seat plate can provide a certain amount of deformation; by arranging the transverse limit teeth, the buffer blocks, and the slide grooves, it is possible to cope with earthquake deformation and displacement in the transverse direction of the bridge, ensure that the adjacent beam ends are hinged, and play a buffering role, providing a certain deflection amplitude; by arranging the buffer plates, it is possible to further prevent the plate beam from being squeezed and deformed; in addition, the structure provided by the present invention can be used for the design of multi-span hollow slabs and small box girder bridges in areas with high seismic intensity, as well as the design of multi-span hollow slabs and small box girder bridges in active fault zones, and there are no special requirements for construction equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of an earthquake-proof falling beam structure in one embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the three-dimensional structure of the earthquake-proof beam-dropping structure in a disassembled state in one embodiment of the present invention (the support is not shown);

[0027] Figure 3 Schematic diagram of the three-dimensional structure of the lower seat plate in one embodiment of the present invention (the buffer block is not shown);

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the lower seat plate in one embodiment of the present invention;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the upper seat plate in one embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the three-dimensional structure of a buffer plate in one embodiment of the present invention;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of a buffer plate in another embodiment of the present invention;

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the initial beam in one embodiment of the present invention;

[0033] Fig. 9 It is a schematic diagram of the three-dimensional structure of the last frame beam in one embodiment of the present invention;

[0034] Fig.10 This is a schematic diagram of the three-dimensional structure of the middle beam in one embodiment of the present invention;

[0035] Fig.11 It is a schematic diagram of the three-dimensional structure of a folded beam in one embodiment of the present invention;

[0036] Fig.12 Schematic diagram of the three-dimensional structure of the plate beam system in one embodiment of the present invention (supports and buffer plates are not shown);

[0037] Fig.13 It is a schematic diagram of the three-dimensional structure of the plate beam system in another embodiment of the present invention (the support and the buffer plate are not shown);

[0038] Explanation of the accompanying drawings: plate beam 1, support 2, lower seat plate 3, fixing groove 31, transverse limit tooth 32, buffer block 33, upper seat plate 4, slide groove 41, buffer plate 5, first vertical buffer part 51, horizontal buffer part 52, second vertical buffer part 53, mounting hole 54, starting beam 6, last beam 7, middle beam 8, closing beam 9.

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 creative work are within the scope of protection of the present invention.

[0041] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0043] Furthermore, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] like Figure 1-Figure 11 As shown, in order to prevent the phenomenon of beam falling in multi-span slab girder bridges caused by natural disasters such as earthquakes, the present invention provides an anti-seismic beam falling structure suitable for multi-span slab girder bridges, including a plurality of slab girder 1 connected in sequence and a support 2 arranged under the slab girder 1, the support 2 can generally be arranged near the adjacent parts of the slab girder 1 and the anti-seismic beam falling structure also includes a connecting seat plate structure located at the connecting ends of two adjacent slab girder 1.

[0045] It should be known that the beam drop of a multi-span slab girder bridge is mainly caused by the deformation and displacement of the slab girder 1 driven by an earthquake, so it is necessary to perform specific treatment on the connection between the slab girder 1 and the slab girder 1. In this embodiment, by providing the connection seat plate structure at the connection ends of two adjacent slab girder 1, it can not only effectively prevent the slab girder 1 from deforming and displacing in the longitudinal and transverse directions of the bridge, but also has low dependence on materials and good durability, which is equivalent to the service life of the slab girder 1 body.

[0046] In order to make the connecting seat plate structure fit with the plate beam 1 and improve the deformation resistance of the plate beam 1, the connecting seat plate structure includes a lower seat plate 3 and an upper seat plate 4 located above the lower seat plate 3, wherein the lower seat plate 3 is integrally formed and arranged at the lower part of the connecting end of one of the two adjacent plate beams 1, and the upper seat plate 4 is integrally formed and arranged at the upper part of the connecting end of the other of the two adjacent plate beams 1. Therefore, at the connection between the two adjacent plate beams 1, one of the plate beams 1 is integrated with the upper seat plate 4, and the other plate beam 1 is integrated with the lower seat plate 3. By performing the above-mentioned integrated arrangement, the integrity of the earthquake-proof falling beam structure can be improved.

[0047] In addition, it should be noted that when the two adjacent plate beams 1 are butt-jointed, the upper seat plate 4 is placed above the lower seat plate 3 to butt-join and fix the two adjacent plate beams 1, thereby ensuring the connection between the plate beams 1 and 1, and the upper seat plate 4 and the lower seat plate 3 are arranged up and down, which can also cope with the three-dimensional earthquake deformation displacement in the direction of the bridge. When the bridge deck has a tendency to displace as a whole in the direction of the bridge, one end of the plate beam 1 will tend to break away from the support 2. However, since the upper and lower seat plates 3 at the ends of the adjacent plate beams 1 are matched, a temporary support can be formed to prevent the beam from falling.

[0048] In order to further improve the anti-deformation and displacement capability between the plate beams 1 and the plate beams 1, especially to improve the effect of anti-seismic deformation and displacement in the transverse direction of the bridge, the upper surface of the lower seat plate 3 that supports the upper seat plate 4 is fixedly provided with a transverse limiting tooth 32, and a buffer block 33 is sleeved on the transverse limiting tooth 32. The upper seat plate 4 is provided with a slide groove 41 arranged along the bridge direction for installing the transverse limiting tooth 32 and the buffer block 33 on the lower surface facing the lower seat plate 3. The slide groove 41 cooperates with the transverse limiting tooth 32 and the buffer block 33 to reduce vibration and dissipate energy, and prevent the plate beam 1 from deforming. Through the action of the transverse limiting tooth 32 and the slide groove 41, the beam ends of the adjacent plate beams 1 are hinged, which can resist the displacement and deformation in the transverse direction. Moreover, the buffer block 33 can play a buffering role and provide a certain deflection amplitude.

[0049] In addition, in order to increase the anti-deformation capacity of the earthquake-proof beam structure, a buffer plate 5 is filled between two adjacent plate beams 1. Compared with the gap filling between the two adjacent plate beams 1, in order to fit the buffer plate 5 with the connecting seat plate structure, facilitate the installation of the buffer plate 5, and avoid the interference of the buffer plate 5 on the installation of the connecting seat plate structure, the buffer plate 5 is provided with a mounting hole 54 for the transverse limit teeth 32 and the buffer block 33 to pass through. It should be known that although the lower seat plate 3 can bear the upper seat plate 4, the two are not necessarily in direct contact, and can also be indirectly stressed through the buffer plate 5; in order to fill the buffer plate 5 between the two adjacent plate beams 1, since the upper seat plate 4 and the lower seat plate 3 are also part of their respective plate beams 1, the height of the upper seat plate 4 and the lower seat plate 3 can be less than half of the height of the plate beam 1, so as to facilitate the filling of the buffer plate 5 between the upper seat plate 4 and the lower seat plate 3.

[0050] It should be noted that since the upper seat plate 4 and the lower seat plate 3 do not exist in isolation but are integrally formed with the corresponding plate beam 1, the upper seat plate 4 and the lower seat plate 3 can also be regarded as part of the corresponding plate beam 1. When the connecting seat plate structure is not provided at the connection between two adjacent plate beams 1 or when the concept of temporary use is needed for description purposes, the connecting end of the plate beam 1 may only represent the ends of the two adjacent plate beams 1 at the connecting position. However, when the two adjacent plate beams 1 are respectively integrally formed with the upper seat plate 4 and the lower seat plate 3, the connection of the plate beam 1 will be adjusted with the existence of the upper seat plate 4 and the lower seat plate 3.

[0051] The workflow of the above embodiment can be: in the actual construction process, the buffer block 33 is mounted on the transverse limiting teeth 32 on the lower seat plate 3, and then the buffer plate 5 is placed close to the lower seat plate 3 and the plate beam 1 integrally formed with the lower seat plate 3, and finally, the lower seat plate 3 is matched and installed with the upper seat plate 4, so that the bridge deck has the ability to resist deformation and displacement in the longitudinal direction of the bridge, and in the matching process of the upper seat plate 4 and the lower seat plate 3, the transverse limiting teeth 32 and the buffer block 33 on the lower seat plate 3 need to be installed in the slide groove 41 of the upper seat plate 4, so that the plate beams 1 and 1 can have the ability to resist deformation and displacement in the transverse direction of the bridge, and increase the buffering performance between the upper seat plate 4 and the lower seat plate 3.

[0052] Under normal conditions: the multi-span slab girder bridge is subjected to horizontal and vertical loads by the support 2 .

[0053] When dealing with earthquake deformation and displacement along the bridge:

[0054] (1) The entire bridge deck is displaced, and one end of the slab beam 1 is separated from the support 2. Since the upper and lower seat plates 3 of the adjacent slab beams 1 coincide with each other, a temporary support can be formed to prevent the beam from falling;

[0055] (2) The bridge deck is displaced and cracked as a whole, and the upper and lower seat plates 3 can provide a certain amount of deformation.

[0056] When dealing with earthquake deformation and displacement in the transverse direction of the bridge: the transverse limit teeth 32 and the buffer blocks 33 not only ensure the hinge at the connecting ends of the adjacent plate beams 1, but also resist the force in the transverse direction of the bridge and provide a certain deflection angle.

[0057] In order to enhance the fixation of the fixing groove 31, a fixing groove 31 is recessed on the upper surface of the lower seat plate 3, and the bottom end of the lateral limiting tooth 32 is fixed in the fixing groove 31, thereby increasing the resistance of the lateral limiting tooth 32 and enabling it to withstand greater force.

[0058] In order to expand the force direction and action direction of the transverse limiting tooth 32, the transverse limiting tooth 32 is cylindrical; and, in order to facilitate the buffer block 33 to be mounted on the transverse limiting tooth 32, the buffer block 33 is provided with a cylindrical through hole for the transverse limiting tooth 32 to pass through up and down, and the shape and size of the cylindrical through hole are consistent with the shape and size of the transverse limiting tooth 32.

[0059] In order to completely fill the gap between the plate beams 1 and the plate beams 1 and increase the buffering effect of the buffer plate 5, the buffer plate 5 is in a broken line shape, and the broken line-shaped buffer plate 5 includes a first vertical buffer portion 51, a horizontal buffer portion 52, and a second vertical buffer portion 53 which are arranged in sequence, and the first vertical buffer portion 51, the horizontal buffer portion 52, and the second vertical buffer portion 53 are usually integrally formed; wherein the first vertical buffer portion 51 is filled between the upper seat plate 4 and the connecting end portion, so that the buffer plate 5 is filled between the upper seat plate 4 of one of the plate beams 1 and the connecting end portion of the other plate beam 1; the horizontal buffer portion 52 is filled between the upper seat plate 4 and the lower seat plate 3, so that the buffer plate 5 is filled between the upper seat plate 4 and the lower seat plate 3; the second vertical buffer portion 53 is filled between the lower seat plate 3 and the connecting end portion, so that the buffer plate 5 is filled between the lower seat plate 3 of the other plate beam 1 and the connecting end portion of one of the plate beams 1. Therefore, the zigzag-shaped buffer plate 5 can fit with the connecting seat plate structure, thereby increasing the buffering performance of the connecting seat plate and thus improving the anti-deformation capability.

[0060] In order to increase the firmness of the buffer plate 5 , the second vertical buffer portion 53 of the buffer plate 5 is fixedly connected to the lower seat plate 3 by means of an adhesive material, that is, the zigzag-shaped buffer plate 5 can be fixed to the surface of the lower seat plate 3 by means of glue.

[0061] In order to fill the buffer plate 5 between two adjacent plate beams 1, especially between the upper seat plate 4 and the lower seat plate 3, the buffer plate 5 is provided with the mounting hole 54 in the horizontal buffer portion 52, so as to facilitate the installation of the broken line-shaped buffer plate 5; in addition, the cross-section of the mounting hole 54 should not be smaller than the cross-section of the slide groove 41, so as to prevent the buffer plate 5 from interfering with the sliding of the transverse limit tooth 32 in the slide groove 41.

[0062] In addition, those skilled in the art should know that since the buffer block 33 and the buffer plate 5 have buffering properties, they should have a certain degree of elasticity. Therefore, in the actual construction process, reference should be made to Figure 6 The mounting hole 54 may be provided only in the horizontal buffer portion 52. Of course, for the convenience of construction, refer to Figure 7 A mounting hole 54 may also be provided in the first vertical buffer portion 51 , and the two mounting holes 54 may be integrally formed to form a large mounting hole 54 .

[0063] In order to facilitate the matching installation of the upper seat plate 4 and the lower seat plate 3, the slide groove 41 provided on the upper seat plate 4 extends to the extended end of the upper seat plate 4, so that the transverse limit teeth 32 and the buffer block 33 can be quickly installed in the slide groove 41. It should be noted that the extended end of the upper seat plate 4 refers to the end of the upper seat plate 4 facing the connection between the two adjacent plate beams 1.

[0064] As a choice of buffer material, taking into account both practical applicability and cost, the buffer plate 5 and the buffer block 33 are both made of rubber.

[0065] As one of the design examples of the above implementation:

[0066] The height of the lower seat plate 3 may be beam height / 2 minus 0.5 cm, and the length of the lower seat plate 3 may be 20 cm.

[0067] A fixing groove 31 with a width of 20 cm, a length of 20 cm and a depth of 1 cm is arranged in the middle of the lower seat plate 3. A cylindrical transverse limiting tooth 32 with a height of 11 cm and a radius of 9 cm is fixed in the fixing groove 31. A buffer block 33 made of rubber is arranged on the outer cover of the cylindrical transverse limiting tooth 32.

[0068] The rubber buffer block 33 has a height of 11 cm, a length and a width of 20 cm, and a cylindrical through hole with a radius of 9 cm is arranged in the middle of the book-searching buffer block 33 .

[0069] The height of the upper seat plate 4 is the beam height / 2 minus 0.5 cm, and the length is 20 cm.

[0070] The upper seat plate 4 is provided with a slide groove 41 with a width of 20 cm, a length of 20 cm, and a depth of 10 cm. The position of the slide groove 41 corresponds to the position of the transverse limiting tooth 32 in the upper and lower directions.

[0071] The seam width between the upper seat plate 4 and the connecting end, and the joint seam width between the lower seat plate 3 and the connecting end are both 2 to 4 cm. The zigzag buffer plate 5 made of rubber is arranged at the gap between the two plate beams 1. The buffer plate 5 has holes corresponding to the transverse limit teeth 32, the buffer block 33 and the slide groove 41. The horizontal part of the zigzag buffer plate 5 is 1 cm thick, and the vertical part is the same as the seam width. The zigzag buffer plate 5 is fixed to the surface of the lower seat plate 3 by glue.

[0072] In addition, as a deepening of the earthquake-proof drop beam structure, since the specific structure in the above-mentioned embodiments needs to be present between each of the two plate beams 1, when the position of the plate beam 1 on the entire beam bridge is different, the position and setting method of the earthquake-proof drop beam structure need to be adapted to the position of the plate beam 1.

[0073] Specifically, when the plate beam 1 is a starting beam 6, one end of the starting beam 6 is a vertical section, and the other end is integrally formed with the lower seat plate 3; when the plate beam 1 is a final beam 7, one end of the final beam 7 is a vertical section, and the other end is integrally formed with the upper seat plate 4; when the plate beam 1 is an intermediate beam 8, one end of the intermediate beam 8 is integrally formed with the upper seat plate 4, and the other end is integrally formed with the lower seat plate 3; when the intermediate beam 8 is a closing beam 9, both ends of the closing beam 9 are integrally formed with the upper seat plate 4.

[0074] That is, when the plate beam is the initial frame beam 6, the initial frame end of the initial frame beam 6 is a vertical section, and the other end is the connecting end integrally formed with the lower seat plate 3;

[0075] When the plate beam is the last frame beam 7, the last frame end of the last frame beam 7 is a vertical section, and the other end is the connecting end integrally formed with the upper seat plate 4;

[0076] When the plate beam is an intermediate beam 8, one end of the intermediate beam 8 is the connecting end portion integrally formed with the upper seat plate 4, and the other end is the connecting end portion integrally formed with the lower seat plate 3;

[0077] When the middle beam is a folding beam 9 , both ends of the folding beam 9 are the connecting ends integrally formed with the upper seat plate 4 .

[0078] Among them, the initial beam 6 and the final beam 7 are arranged at the two ends of the beam bridge. Usually, the initial beam 6 is arranged at one end of the beam bridge, and the final beam 7 is arranged at the other end. However, in some cases, the initial beam 6 can be arranged at both ends of the beam bridge.

[0079] In order to improve the anti-seismic beam drop performance of the plate beam 1 as a whole, the present invention further provides a plate beam system, including the anti-seismic beam drop structure as described in any of the above embodiments. That is, the plate beam system is constructed by multiple plate beams 1 according to the anti-seismic beam drop structure.

[0080] The relationship between the plate beams 1 and the plate beams 1 can be specifically that when the first frame beam 6 is provided at one end of the beam bridge and the last frame beam 7 is provided at the other end, Fig.12 The middle beam 8 is usually arranged between the first beam 6 and the last beam 7 to form a plurality of plate beams 1 into a whole; for example: the first beam 6, the middle beam 8, ..., the last beam 7.

[0081] When the initial beam 6 can be provided at both ends of the beam bridge, refer to Fig.13 , it is necessary to arrange the closing beam 9 between the middle beam 8 and the middle beam 8 or between the two initial beams 6 to build the plate beam 1 as a whole. For example: initial beam 6, middle beam 8, ..., closing beam, middle beam 8, initial beam 6.

[0082] In addition, it should be noted that the earthquake-proof drop beam structure or the plate beam system described in any of the above-mentioned embodiments can also be used with the entire beam bridge, thereby obtaining a multi-span plate beam bridge and improving the seismic performance of the beam bridge.

[0083] The above technical solutions of the present invention are only preferred embodiments of the present invention, and the patent scope of the present invention is not limited thereto. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An earthquake-proof beam-dropping structure suitable for a multi-span slab-beam bridge, comprising a plurality of slab beams connected in sequence and supports arranged below the slab beams, characterized in that: The earthquake-proof beam-dropping structure further comprises a connecting seat plate structure located at the connecting ends of two adjacent plate beams; Wherein, the connecting seat plate structure comprises a lower seat plate and an upper seat plate located above the lower seat plate, the lower seat plate is integrally formed and arranged at the lower part of the connecting end of one of the two adjacent plate beams, the upper seat plate is integrally formed and arranged at the upper part of the connecting end of the other of the two adjacent plate beams, and when the two adjacent plate beams are butt-jointed, the upper seat plate is placed above the lower seat plate to butt-join and fix the two adjacent plate beams; A transverse limiting tooth is fixedly provided on the upper surface of the lower seat plate that supports the upper seat plate, a buffer block is sleeved on the transverse limiting tooth, and a sliding groove arranged along the bridge direction for installing the transverse limiting tooth and the buffer block is opened on the lower surface of the upper seat plate facing the lower seat plate; A fixing groove is concavely provided on the upper surface of the lower seat plate, and the bottom end of the transverse limiting tooth is fixed in the fixing groove; A buffer plate is filled between two adjacent plate beams, and a mounting hole is provided on the buffer plate for the transverse limiting teeth and the buffer block to pass through; The buffer plate is in a zigzag shape, and the zigzag-shaped buffer plate includes a first vertical buffer portion, a horizontal buffer portion, and a second vertical buffer portion which are arranged in sequence; wherein the first vertical buffer portion is filled between the upper seat plate and the connecting end portion, the horizontal buffer portion is filled between the upper seat plate and the lower seat plate, and the second vertical buffer portion is filled between the lower seat plate and the connecting end portion.

2. The earthquake-proof beam-dropping structure according to claim 1, characterized in that: The transverse limiting tooth is cylindrical, and the buffer block is provided with a cylindrical through hole for the transverse limiting tooth to pass through up and down.

3. The earthquake-proof beam-dropping structure according to claim 1, characterized in that: The second vertical buffer portion of the buffer plate is fixedly connected to the lower seat plate through an adhesive material.

4. The earthquake-proof beam-dropping structure according to claim 1, characterized in that: The buffer plate is provided with the mounting hole in the horizontal buffer portion, and the cross section of the mounting hole is not smaller than the cross section of the slide groove.

5. The earthquake-proof beam-dropping structure according to claim 1, characterized in that: The sliding groove formed on the upper seat plate extends to an extending end of the upper seat plate.

6. The earthquake-proof beam-dropping structure according to claim 1, characterized in that: The buffer plate and the buffer block are both made of rubber.

7. The earthquake-proof falling beam structure according to any one of claims 1 to 6, characterized in that: When the plate beam is a starting beam, the starting end of the starting beam is a vertical section, and the other end is the connecting end integrally formed with the lower seat plate; When the plate beam is the last frame beam, the last frame end of the last frame beam is a vertical section, and the other end is the connecting end portion integrally formed with the upper seat plate; When the plate beam is an intermediate beam, one end of the intermediate beam is the connecting end portion integrally formed with the upper seat plate, and the other end is the connecting end portion integrally formed with the lower seat plate; When the middle beam is a folded beam, both ends of the folded beam are the connecting ends integrally formed with the upper seat plate.

8. A plate beam system, characterized in that: It comprises the earthquake-proof falling beam structure as described in any one of claims 1-7.

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