Reinforcement material and reinforcement structure

Abstract

To provide reinforcing material enabling suppression of the occurrence of fatigue cracks in a weld zone between a deck plate and a longitudinal rib and a weld zone between the deck plate and a transverse rib.SOLUTION: The reinforcing material is reinforcing material reinforcing a steel deck that includes: a deck plate; transverse ribs extending perpendicular to the bridge axis and welded to the underside of the deck plate; and longitudinal ribs crossing the transverse ribs and extending along the bridge axis direction and welded to the underside of the deck plate. The reinforcing material includes: a first adhesion portion adhered to the underside of the deck plate; a second adhesion portion adhered to the transverse rib; and a third adhesion portion adhered to the longitudinal rib. The reinforcing material is formed from fiber-reinforced plastic.SELECTED DRAWING: Figure 3

Description

Technical Field

[0007]

[0001] The present invention relates to a reinforcing material for reinforcing a steel floor slab and a reinforcing structure using the reinforcing material.

Background Art

[0002] Conventionally, a bridge having a steel floor slab with a deck plate, transverse ribs, and longitudinal ribs has been known. The deck plate is a floor slab that supports a passing object (e.g., a vehicle, a person, etc.) passing through the bridge. The transverse ribs are ribs that extend along a direction perpendicular to the bridge axis and are welded to the lower surface of the deck plate. The longitudinal ribs are ribs that intersect the transverse ribs and extend along the bridge axis direction and are welded to the lower surface of the deck plate.

[0003] Note that the bridge axis direction is the extension direction of the bridge. The direction perpendicular to the bridge axis is a direction perpendicular to the bridge axis direction and the vertical direction.

[0004] In such a steel floor slab, due to the load of the passing object passing on the deck plate, stress concentrates on the welded portion between the deck plate and the longitudinal rib, etc., and it is an issue to suppress fatigue cracks generated at such welded portions.

[0005] Patent Document 1 discloses a reinforcing structure in which a substantially L-shaped carbon fiber resin plate is attached with an adhesive from the lower surface of the deck plate to the side surface of the longitudinal rib centering on the welded portion between the deck plate and the longitudinal rib.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] Incidentally, in steel decks, fatigue cracks can occur not only at the welds between the deck plates and longitudinal ribs, but also at the welds between the deck plates and transverse ribs, among other places.

[0008] In particular, in steel deck plates where scallops (notches) are formed on the transverse ribs at the intersections of transverse and longitudinal ribs, fatigue cracks are prone to occur from the edges of the scallops, at the welds between the deck plate and the transverse ribs, and in the surrounding areas. It should be noted that there are also steel deck plates without scallops.

[0009] Furthermore, since the carbon fiber resin plate described in Patent Document 1 is attached only to two surfaces, the underside of the deck plate and the side surface of the longitudinal rib, it can suppress fatigue cracks in the welded joint between the deck plate and the longitudinal rib, but it cannot suppress the occurrence of fatigue cracks in the welded joint between the deck plate and the transverse rib.

[0010] The present invention aims to provide a reinforcing material and a reinforcing structure that can suppress the occurrence of fatigue cracks in the welded joints between deck plates and longitudinal ribs, and between deck plates and transverse ribs. [Means for solving the problem]

[0011] The first embodiment of the reinforcing material is a reinforcing material for a steel deck plate having a deck plate, transverse ribs extending in a direction perpendicular to the bridge axis and welded to the lower surface of the deck plate, and longitudinal ribs intersecting the transverse ribs and extending in the direction of the bridge axis and welded to the lower surface of the deck plate, and comprises a first adhesive portion bonded to the lower surface of the deck plate, a second adhesive portion bonded to the transverse ribs, and a third adhesive portion bonded to the longitudinal ribs, and is made of fiber-reinforced plastic.

[0012] Thus, the reinforcing member of the first embodiment includes a first adhesive portion bonded to the lower surface of the deck plate, a second adhesive portion bonded to the transverse rib, and a third adhesive portion bonded to the longitudinal rib. As a result, the stress acting on the welds between the deck plate and the longitudinal rib, and between the deck plate and the transverse rib, can be reduced. Consequently, the occurrence of fatigue cracks in the welds between the deck plate and the longitudinal rib, and between the deck plate and the transverse rib can be suppressed.

[0013] In the reinforcing material of the second embodiment, the first adhesive portion, the second adhesive portion, and the third adhesive portion are formed in a plate shape, with one end of the first adhesive portion in the bridge axis direction connected to the upper end of the second adhesive portion, one end of the first adhesive portion perpendicular to the bridge axis connected to the upper end of the third adhesive portion, and one end of the third adhesive portion in the bridge axis direction connected to one end of the second adhesive portion perpendicular to the bridge axis.

[0014] Therefore, compared to a configuration in which the reinforcing material is formed in a block shape, it is possible to reduce the weight of the reinforcing material while maintaining its reinforcing performance.

[0015] In the reinforcing material of the third embodiment, each of the first adhesive portion, the second adhesive portion, and the third adhesive portion contains fibers oriented in two intersecting directions.

[0016] Therefore, even when loads are applied to the reinforcing material in the two intersecting directions, it can withstand those loads. As a result, compared to a configuration in which each of the first, second, and third bonding sections contains only fibers oriented in one direction, the stress acting on the welds between the deck plate and the longitudinal ribs, and between the deck plate and the transverse ribs, can be reduced. Consequently, the occurrence of fatigue cracks in the welds between the deck plate and the longitudinal ribs, and between the deck plate and the transverse ribs can be suppressed.

[0017] In the reinforcing material of the fourth embodiment, the third adhesive portion is arranged along an inclination direction that is inclined with respect to the direction perpendicular to the bridge axis when viewed in the direction of the bridge axis, and the second adhesive portion contains fibers oriented in an orthogonal direction that is perpendicular to the inclination direction.

[0018] Thus, the second bonding portion contains fibers oriented in a direction perpendicular to the inclination direction. Therefore, even when a load is applied to the reinforcing material in a direction perpendicular to the inclination direction, it can resist the load, and the stress acting on the welds between the deck plate and the longitudinal ribs, and between the deck plate and the transverse ribs, can be reduced. As a result, the occurrence of fatigue cracks in the welds between the deck plate and the longitudinal ribs, and between the deck plate and the transverse ribs can be suppressed.

[0019] In the fifth embodiment of the reinforcing material, the third adhesive portion is arranged along an inclined direction that is inclined with respect to the direction perpendicular to the bridge axis when viewed in the bridge axis direction, and the second adhesive portion contains fibers oriented in the inclined direction.

[0020] Thus, the second bonding portion contains fibers oriented in the aforementioned inclined direction. Therefore, even when a load is applied to the reinforcing material in the inclined direction, it can resist the load, and the stress acting on the welds between the deck plate and the longitudinal ribs, and between the deck plate and the transverse ribs, can be reduced. As a result, the occurrence of fatigue cracks in the welds between the deck plate and the longitudinal ribs, and between the deck plate and the transverse ribs can be suppressed.

[0021] The sixth embodiment of the reinforcing structure comprises a reinforcing member according to any of the first to fifth embodiments, wherein the first adhesive portion of the reinforcing member is bonded to the lower surface of the deck plate of the steel deck, the second adhesive portion of the reinforcing member is bonded to the transverse rib of the steel deck, and the third adhesive portion of the reinforcing member is bonded to the longitudinal rib of the steel deck.

[0022] In the sixth embodiment of the reinforcing structure, the reinforcing material comprises a first adhesive portion bonded to the lower surface of the deck plate, a second adhesive portion bonded to the transverse rib, and a third adhesive portion bonded to the longitudinal rib. This reduces the stress acting at the welds between the deck plate and the longitudinal rib, and between the deck plate and the transverse rib. As a result, the occurrence of fatigue cracks at the welds between the deck plate and the longitudinal rib, and between the deck plate and the transverse rib can be suppressed.

[0023] In the reinforcing structure of the seventh aspect, a pair of the reinforcing members are disposed in a region between two of the vertical ribs adjacent to each other in a direction perpendicular to the bridge axis, the third bonding portion on one of the pair of the reinforcing members is bonded to one of the two vertical ribs, and the third bonding portion on the other of the pair of the reinforcing members is bonded to the other of the two vertical ribs.

[0024] Therefore, compared with a configuration in which only one reinforcing member is disposed in a region between two vertical ribs adjacent to each other in a direction perpendicular to the bridge axis, in the region between the two vertical ribs, the stress acting on the welded portion between the deck plate and the vertical rib and the welded portion between the deck plate and the horizontal rib can be reduced. As a result, the occurrence of fatigue cracks in the welded portion between the deck plate and the vertical rib and the welded portion between the deck plate and the horizontal rib can be suppressed.

[0025] In the reinforcing structure of the eighth aspect, the pair of the reinforcing members are disposed in the region existing in a first range through which the wheels of a vehicle traveling on the deck plate pass, and the reinforcing members are not disposed in a second range in which the wheels of a vehicle traveling on the deck plate do not pass or the passing frequency of the wheels is lower than the first range.

[0026] Therefore, compared with a configuration in which the reinforcing members are disposed in all regions between the two vertical ribs, the wheel load of a vehicle traveling on the deck plate can be efficiently supported.

[0027] In the reinforcing structure of the ninth aspect, at least one bonding portion of the first bonding portion, the second bonding portion, and the third bonding portion is bonded in a state in which a high-elongation material having a higher elongation than the reinforcing member is sandwiched between the at least one bonding portion and the steel floor slab.

[0028] Therefore, compared with a configuration in which all of the first bonding portion, the second bonding portion, and the third bonding portion are bonded in a state of directly contacting the steel floor slab, the reinforcing member follows the deformation of the steel floor slab and the peeling of the reinforcing member is suppressed.

Advantages of the Invention

[0029] Because of the above configuration, the present invention has the excellent effect of suppressing the occurrence of fatigue cracks in the welded joints between the deck plate and the longitudinal ribs, and between the deck plate and the transverse ribs. [Brief explanation of the drawing]

[0030] [Figure 1] This is a schematic diagram showing a portion of a bridge reinforced by the reinforcing structure according to this embodiment. [Figure 2] Figure 1 is a perspective view of a portion of the steel deck of the bridge shown, taken from a diagonal downward angle. [Figure 3] This is a partially enlarged view of a portion of the bridge shown in Figure 1. [Figure 4] This is a front view of the reinforcing member according to this embodiment, as seen from one side in the bridge axis direction (specifically, the front side of the paper in Figures 1 and 3). [Figure 5] This is a side view of the reinforcing material according to this embodiment, as seen from the direction of arrow X1 in Figure 4. [Figure 6] This is a bottom view of the reinforcing material according to this embodiment, as seen from the direction of arrow Z1 in Figure 4. [Figure 7] This figure shows a configuration (comparative example) in which no reinforcing material is provided according to this embodiment. [Figure 8] This figure shows a modified example in which a high-elongation material is sandwiched between the reinforcing material and the steel deck slab according to this embodiment. [Modes for carrying out the invention]

[0031] An example of an embodiment of the present invention will be described below with reference to the drawings.

[0032] (Bridge 10) First, the bridge 10, which is the object of reinforcement to be reinforced by the reinforcement structure 19 according to this embodiment, will be described. Figure 1 is a schematic diagram showing a part of the bridge 10. Figure 2 is a perspective view of a part of the steel deck 12 provided on the bridge 10, viewed from diagonally below. Figure 3 is a partially enlarged view of the part of the bridge 10 shown in Figure 1.

[0033] In each diagram, the X direction indicates the bridge axis direction, the Y direction indicates the direction perpendicular to the bridge axis, and the Z direction indicates the vertical direction. The bridge axis direction is the direction of extension of bridge 10. The direction perpendicular to the bridge axis is the direction perpendicular to the bridge axis direction and the vertical direction. The X, Y, and Z directions are mutually orthogonal directions. In the following explanation, the bridge axis direction may be referred to as the front-to-back direction, and the direction perpendicular to the bridge axis may be referred to as the left-to-right direction.

[0034] The bridge 10 shown in Figure 1 is a bridge used, for example, as an elevated bridge on which an expressway is laid. As shown in Figure 1, the bridge 10 comprises pavement material 11 and a steel deck 12. The steel deck 12 has a deck plate 14, a plurality of main girders 16, transverse ribs 18, and a plurality of U-ribs 20. Each of the deck plate 14, main girders 16, transverse ribs 18, and U-ribs 20 is made of steel. The U-ribs 20 are an example of longitudinal ribs.

[0035] The deck plate 14 is a floor slab that supports objects (e.g., vehicles 100, people, etc.) that travel across the bridge 10. This deck plate 14 is formed in a flat plate shape with the vertical direction as the thickness direction. The upper surface 14A of the deck plate 14 is paved with paving material 11. Various materials such as asphalt or concrete can be used as the paving material 11.

[0036] The main girder 16 extends along the bridge axis direction. The cross-sectional shape of the main girder 16, when viewed in the bridge axis direction, is, for example, I-shaped. The upper end of the main girder 16 is welded, for example, to the lower surface 14B of the deck plate 14.

[0037] The transverse rib 18 extends along the direction perpendicular to the bridge axis and is welded to the lower surface 14B of the deck plate 14. The cross-sectional shape of this transverse rib 18, when viewed perpendicular to the bridge axis, is, for example, an inverted T shape (see Figure 2). One end and the other end of the transverse rib 18 perpendicular to the bridge axis are welded to the main girder 16, for example, as shown in Figure 1.

[0038] Specifically, the transverse rib 18, as shown in Figure 2, has a web 18A formed in a plate shape with the bridge axis direction as the thickness direction, and a flange 18B that protrudes from the lower end of the web 18A in the front-rear direction (i.e., one side and the other side in the bridge axis direction). The flange 18B is plate-shaped with the vertical direction as the thickness direction. The upper end of the web 18A is welded, for example, to the lower surface 14B of the deck plate 14.

[0039] Furthermore, a recess 18C is formed at the upper end of the web 18A, where the U-rib 20 is positioned. Multiple recesses 18C are arranged at predetermined intervals in a direction perpendicular to the bridge axis. Each of the recesses 18C opens upward (i.e., toward the deck plate 14).

[0040] The U-rib 20 intersects the transverse rib 18 and extends along the bridge axis direction, and is welded to the lower surface 14B of the deck plate 14. Specifically, the U-rib 20 passes through the recess 18C of the transverse rib 18. In other words, the U-rib 20 extends along the bridge axis direction so as to penetrate the transverse rib 18.

[0041] Furthermore, as shown in Figure 3, the U-rib 20 is formed in a U-shaped cross-section with an opening on the upper side (i.e., the deck plate 14 side) when viewed in the direction of the bridge axis. Specifically, the U-rib 20 has a bottom wall portion 22 that extends perpendicular to the bridge axis when viewed in the direction of the bridge axis, and a pair of side wall portions 23 and 25 that extend upward from the left end and right end (i.e., one end and the other end perpendicular to the bridge axis) of the bottom wall portion 22. The bottom wall portion 22 is formed in a plate shape with the vertical direction as the thickness direction.

[0042] As shown in Figure 3, the side walls 23 and 25 are inclined with respect to the bottom wall 22 such that the distance between them increases towards the upper end (i.e., the deck plate 14 side). Specifically, the side wall 23 is arranged along an inclination direction M1 perpendicular to the bridge axis when viewed in the bridge axis direction. The side wall 25 is arranged along an inclination direction M2 perpendicular to the bridge axis when viewed in the bridge axis direction.

[0043] The side wall portion 23 is formed in a plate shape with a thickness direction of N1 perpendicular to the inclination direction M1. The side wall portion 25 is formed in a plate shape with a thickness direction of N2 perpendicular to the inclination direction M2. The upper ends of the side wall portions 23 and 25 are welded to the lower surface 14B of the deck plate 14. As a result, the U-rib 20 forms a closed cross section with the deck plate 14. The outer circumferential surface of the U-rib 20 (i.e., the lower surface of the bottom wall portion 22 and the outer surfaces of the side wall portions 23 and 25) are welded to the edge portion of the recess 18C in the web 18A of the transverse rib 18.

[0044] A scallop 18E, which is a fan-shaped notch, is formed at the upper edge of the recess 18C of the transverse rib 18. The scallop 18E prevents the welds 71 ​​(see Figure 7) between the deck plate 14 and the upper end of the U-rib 20, 72 (see Figure 7) between the deck plate 14 and the transverse rib 18, and 73 (see Figure 7) between the side walls 23 and 25 of the U-rib 20 and the transverse rib 18 from overlapping.

[0045] As shown in Figure 3, a scallop 18F, which is a notch, is formed at the lower end of the recess 18C of the transverse rib 18. The scallop 18F is formed along the lower portion of the bottom wall 22 and side wall portions 23 and 25 of the U-rib 20 when viewed in the bridge axis direction.

[0046] (Reinforcement structure 19) The reinforcing structure 19 comprises multiple pairs of reinforcing members 50 and 51, as shown in Figure 1. In this reinforcing structure 19, each pair of reinforcing members 50 and 51 is bonded to the steel deck slab 12. The reinforcing members 50 and 51 will be described in detail below. Figure 4 is a front view of the reinforcing member 50 as seen from one side in the bridge axis direction (specifically, the front side of the paper in Figures 1 and 3). Figure 4 can also be considered an enlarged view of the reinforcing member shown in Figure 3. Figure 5 is a side view of the reinforcing member 50 as seen from the direction of arrow X1 in Figure 4. Figure 6 is a bottom view of the reinforcing member 50 as seen from the direction of arrow Z1 in Figure 4.

[0047] (Reinforcement materials 50, 51) The pair of reinforcing members 50 and 51 are positioned in region 29R between two adjacent U-ribs 20(A) and 20(B) perpendicular to the bridge axis, as shown in Figure 1. In this embodiment, region 29R is the region located in the first range 61 through which the wheels 102 of a vehicle 100 traveling on the deck plate 14 pass. That is, the reinforcing members 50 and 51 are positioned in region 29R located in the first range 61 through which the wheels 102 of a vehicle 100 traveling on the deck plate 14 pass.

[0048] In areas 29S where the wheels 102 of a vehicle 100 traveling on the deck plate 14 do not pass, or where the frequency of the wheels 102 passing is lower than in the first area 61, the pair of reinforcing members 50 and 51 are not placed. In Figure 1, one of the multiple areas 29S is labeled with a reference numeral.

[0049] In this embodiment, among the regions between the two U-ribs 20, the region that overlaps with the first region 61 in a vertical view can be identified as region 29R located in the first region 61. Furthermore, among the regions between the two U-ribs 20, the region that completely overlaps with the second region 62 in a vertical view can be identified as region 29S located in the second region 62. Note that the first region 61 and the second region 62 are regions aligned perpendicular to the bridge axis. For example, the lane on which a vehicle 100 travels can be identified as the first region 61, and the shoulder and roadside can be identified as the second region 62. Additionally, for example, within a lane, the position where the wheels pass (i.e., the wheel load position) can be identified as the first region 61, and the remaining region can be identified as the second region 62.

[0050] Reinforcement members 50 and 51 are formed similarly, except that they are formed symmetrically, as shown in Figure 3. Therefore, in the following description, reinforcement member 50 will be described, and for reinforcement member 51, the same reference numerals will be used for parts that have the same function as reinforcement member 50, and their descriptions will be omitted as appropriate.

[0051] The reinforcing material 50 is made of fiber-reinforced plastic. The fibers used in the reinforcing material 50 can be, for example, one or more types of organic fibers such as aramid, PBO (poly(p-phenylenebenzbisoxazole)), polyamide, polyarylate, and polyester, or metal fibers such as basalt fibers, carbon fibers, glass fibers, and steel fibers.

[0052] As shown in Figures 2, 3, and 4, the reinforcing member 50 has a plate bonding portion 54 that is bonded to the lower surface 14B of the deck plate 14, a transverse rib bonding portion 58 that is bonded to the transverse rib 18, and a U-rib bonding portion 52 that is bonded to the U-rib 20. The plate bonding portion 54 is an example of a first bonding portion, the transverse rib bonding portion 58 is an example of a second bonding portion, and the U-rib bonding portion 52 is an example of a third bonding portion.

[0053] The plate bonding portion 54 constitutes the upper end portion of the reinforcing material 50 and is formed in a plate shape with the vertical direction as the thickness direction. The upper surface 54A of the plate bonding portion 54 is bonded to the lower surface 14B of the deck plate 14. In other words, the upper surface 54A of the plate bonding portion 54 functions as the bonding surface to the deck plate 14.

[0054] As shown in Figure 5, the transverse rib bonding portion 58 constitutes one end portion of the reinforcing member 50 in the bridge axis direction and is formed in a plate shape with the bridge axis direction as the thickness direction. One end face 58A of the transverse rib bonding portion 58 in the bridge axis direction is bonded to the web 18A of the transverse rib 18. That is, one end face 58A of the transverse rib bonding portion 58 in the bridge axis direction functions as the bonding surface to the transverse rib 18. In this embodiment, as shown in Figure 3, the transverse rib bonding portion 58 is bonded to the transverse rib 18 such that it overlaps (covers) at least a portion of the scallop 18E of the transverse rib 18 when viewed in the bridge axis direction. Also, the transverse rib bonding portion 58 is formed in a substantially pentagonal shape when viewed in the bridge axis direction. Furthermore, as shown in Figures 4 and 5, the lower end of the transverse rib bonding portion 58 protrudes downward from the lower end of the U-rib bonding portion 52. Also, as shown in Figure 4, the lower end of the transverse rib bonding portion 58 is positioned along the orthogonal direction N2 and is inclined with respect to the direction perpendicular to the bridge axis.

[0055] As shown in Figure 4, the U-rib adhesive portion 52 constitutes one end portion of the reinforcing member 50 in the direction perpendicular to the bridge axis and is arranged along the inclination direction M2. The U-rib adhesive portion 52 is formed in a plate shape with the direction perpendicular to the bridge axis (specifically, the orthogonal direction N2) as the thickness direction. One end face 52A of the U-rib adhesive portion 52 in the direction perpendicular to the bridge axis (specifically, the orthogonal direction N2) is bonded to the outer surface of the side wall portion 25 of the U-rib 20(A). That is, one end face 52A of the U-rib adhesive portion 52 in the direction perpendicular to the bridge axis functions as the bonding surface to the U-rib 20(A). In the reinforcing member 51, the U-rib adhesive portion 52 is arranged along the inclination direction M1 and is bonded to the outer surface of the side wall portion 23 of the U-rib 20(B).

[0056] In this embodiment, as shown in Figure 3, the plate bonding portion 54, the transverse rib bonding portion 58, and the U-rib bonding portion 52 are each directly bonded to, for example, the respective parts of the steel deck 12. As the adhesive used to bond the reinforcing materials 50 and 51 to the steel deck 12, for example, a room-temperature curing epoxy resin, epoxy acrylate resin, acrylic resin, MMA resin, vinyl ester resin, unsaturated polyester resin, and a photocuring resin can be used. Furthermore, when bonding the reinforcing materials 50 and 51 to the steel deck 12, the reinforcing materials 50 and 51 may be held in place by retaining members 98, such as rivets or magnets, until the adhesive hardens.

[0057] The reinforcing member 50 further comprises connecting parts 53 (see Figure 5), 55 (see Figure 4), and 57 (see Figure 6). As shown in Figure 5, connecting part 53 connects one end of the plate bonding part 54 in the bridge axis direction to the upper end of the transverse rib bonding part 58. As shown in Figure 4, connecting part 55 connects one end of the plate bonding part 54 perpendicular to the bridge axis to the upper end of the U-rib bonding part 52. As shown in Figure 6, connecting part 57 connects one end of the U-rib bonding part 52 in the bridge axis direction to one end of the transverse rib bonding part 58 perpendicular to the bridge axis. Each of the connecting parts 53 (see Figure 5), 55 (see Figure 4), and 57 (see Figure 6) is formed in an arc shape (R shape) when viewed in the bridge axis direction.

[0058] In the reinforcing material 50, each of the plate bonding portion 54, the transverse rib bonding portion 58, and the U-rib bonding portion 52 contains fibers oriented in two intersecting directions. Specifically, in each of the plate bonding portion 54, the transverse rib bonding portion 58, and the U-rib bonding portion 52, the fibers are oriented in two orthogonal directions along the plate surface direction of each bonding portion. More specifically, in the plate bonding portion 54, the fibers are oriented in two directions: in the bridge axis direction and perpendicular to the bridge axis. In the U-rib bonding portion 52, the fibers are oriented in two directions: in the bridge axis direction and in the inclination direction M2 (vertical direction when viewed perpendicular to the bridge axis). In the transverse rib bonding portion 58, the fibers are oriented in two directions: in the inclination direction M2 and perpendicular to the bridge axis N2.

[0059] In the reinforcing member 50, the width W1 (see Figure 4) of the plate bonding portion 54 (including the portion from the center 55P in the circumferential direction S1 of the connecting portion 55 to the plate bonding portion 54 side) perpendicular to the bridge axis is, for example, 100 mm or more and 200 mm or less.

[0060] The length H1 (see Figure 4) of the inclination direction M2 of the U-rib bonding portion 52 (including the portion from the center 55P in the circumferential direction S1 of the connecting portion 55 to the U-rib bonding portion 52 side) is, for example, 70 mm or more and 170 mm or less. The length H1 is shorter than the width W1.

[0061] The length L1 (see Figure 5) of the plate bonding portion 54 (including the connecting portion 53) in the bridge axis direction is set to, for example, 50 mm or more and 150 mm or less. Length L1 is shorter than length H1.

[0062] The length L2 (see Figure 6) of the U-rib bonding section 52 (including the connecting section 57) in the bridge axis direction is set to, for example, 50 mm or more and 150 mm or less. Length L2 is set to be the same as length L1.

[0063] The thickness T1 of each of the plate bonding portion 54, the transverse rib bonding portion 58, and the U-rib bonding portion 52 (see Figures 4, 5, and 6) is, for example, 6 mm or more and 12 mm or less.

[0064] The radii 53R, 55R, and 57R of the connecting portion 53 (see Figure 5), connecting portion 55 (see Figure 4), and connecting portion 57 (see Figure 6) are, for example, set to 20 mm or more and 40 mm or less. In addition, the angle θ1 (see Figure 4) of the U-rib bonding portion 52 with respect to the plate bonding portion 54 in the bridge axis direction is, for example, set to 95 degrees or more and 115 degrees or less.

[0065] (Effects of this embodiment) The effects and advantages of this embodiment will now be explained.

[0066] In the reinforcing structure 19 according to this embodiment, the pair of reinforcing members 50 and 51 have a plate bonding portion 54 that is bonded to the lower surface 14B of the deck plate 14, a transverse rib bonding portion 58 that is bonded to the transverse rib 18, and a U-rib bonding portion 52 that is bonded to the U-rib 20, as shown in Figures 2, 3 and 4.

[0067] Here, as shown in Figure 7, in a configuration where reinforcing members 50 and 51 are not provided to the steel deck 12, fatigue cracks may occur in various parts of the steel deck 12 when loads from objects (e.g., vehicles 100, people, etc.) passing over the bridge 10 are repeatedly applied. Fatigue cracks occur, for example, at the welds 71 ​​between the deck plate 14 and the U-rib 20, the welds 72 between the deck plate 14 and the transverse rib 18, and the welds 73 between the transverse rib 18 and the U-rib 20.

[0068] In particular, when a scallop 18E, which is a notch, is formed in the transverse rib 18 at the intersection of the transverse rib 18 and the U-rib 20, fatigue cracks are likely to occur from the edge of the scallop 18E in the welded portion 72, the welded portion 73, and their surrounding areas.

[0069] In contrast, in the reinforcing structure 19, as described above, the pair of reinforcing members 50 and 51 have adhesive portions (i.e., plate adhesive portion 54, transverse rib adhesive portion 58, and U-rib adhesive portion 52) that are bonded to the deck plate 14, transverse rib 18, and U-rib 20, respectively, as shown in Figures 2, 3, and 4, so that the stress acting on the welded portions 71, 72, and 73 can be reduced. As a result, the occurrence of fatigue cracks in the welded portions 71, 72, and 73 can be suppressed.

[0070] Furthermore, in the reinforcing structure 19, each individual member of the reinforcing material 50, 51 has a plate bonding portion 54, a transverse rib bonding portion 58, and a U-rib bonding portion 52. Therefore, multiple welded portions (specifically welded portions 71, 72, and 73) can be reinforced simultaneously by a single member (specifically, reinforcing material 50 or reinforcing material 51). As a result, compared to reinforcing each of the multiple welded portions with separate members, this leads to a reduction in the number of parts and a reduction in the number of steps required to attach the reinforcing materials 50, 51 to the steel deck plate 12.

[0071] Furthermore, in the reinforcing members 50 and 51, the plate bonding portion 54, the transverse rib bonding portion 58, and the U-rib bonding portion 52 are formed in a plate shape, and each of the plate bonding portion 54, transverse rib bonding portion 58, and U-rib bonding portion 52 is connected to each other by connecting portion 53 (see Figure 5), connecting portion 55 (see Figure 4), and connecting portion 57 (see Figure 6). Therefore, compared to a configuration in which the reinforcing members 50 and 51 are formed in a block shape (for example, a polygonal prism shape), it is possible to reduce the weight of the reinforcing members 50 and 51 while maintaining their reinforcing performance.

[0072] In the reinforcing materials 50 and 51, the plate bonding portion 54, the transverse rib bonding portion 58, and the U-rib bonding portion 52 each contain fibers oriented in two intersecting directions. Therefore, even when a load is applied to the reinforcing materials 50 and 51 in these two intersecting directions, the load can be resisted. As a result, the stress acting on the welded portions 71, 72, and 73 can be reduced compared to a configuration in which the plate bonding portion 54, the transverse rib bonding portion 58, and the U-rib bonding portion 52 each contain fibers oriented in only one direction. Consequently, the occurrence of fatigue cracks in the welded portions 71, 72, and 73 can be suppressed.

[0073] Furthermore, in the reinforcing members 50 and 51, the transverse rib bonding portion 58 contains fibers oriented in the orthogonal direction N2. Therefore, even when a load is applied to the reinforcing members 50 and 51 in the orthogonal direction N2, the reinforcing members can withstand the load, and the stress acting on the welded portions 71, 72, and 73 can be reduced. As a result, the occurrence of fatigue cracks in the welded portions 71, 72, and 73 can be suppressed.

[0074] Furthermore, in the reinforcing members 50 and 51, the transverse rib bonding portion 58 contains fibers oriented in the inclined direction M2. Therefore, even when a load is applied to the reinforcing members 50 and 51 in the inclined direction M2, the reinforcing members 50 and 51 can withstand the load, and the stress acting on the welded portions 71, 72, and 73 can be reduced. As a result, the occurrence of fatigue cracks in the welded portions 71, 72, and 73 can be suppressed.

[0075] Furthermore, in the reinforcing structure 19, the pair of reinforcing members 50 and 51 are positioned in the region 29R between the two U-ribs 20(A) and 20(B), as shown in Figure 1. In addition, the U-rib bonding portion 52 of reinforcing member 50 is bonded to the side wall portion 25 of U-rib 20(A), and the U-rib bonding portion 52 of reinforcing member 51 is bonded to U-rib 20(B).

[0076] Therefore, compared to a configuration in which only one reinforcing member 50 is placed in region 29R between the two U-ribs 20(A) and 20(B), the stress acting on the welds 71, 72, and 73 in region 29R can be reduced. As a result, the occurrence of fatigue cracks in the welds 71, 72, and 73 can be suppressed.

[0077] Region 29R is the region located in the first range 61 through which the wheels 102 of the vehicle 100 traveling on the deck plate 14 pass. That is, the pair of reinforcing members 50 and 51 are positioned in region 29R, which is located in the first range 61 through which the wheels 102 of the vehicle 100 traveling on the deck plate 14 pass, as shown in Figure 1.

[0078] In areas 29S where the wheels 102 of a vehicle 100 traveling on the deck plate 14 do not pass, or where the frequency of the wheels 102 passing is lower than in the first area 61, the pair of reinforcing members 50 and 51 are not placed.

[0079] Therefore, compared to a configuration in which a pair of reinforcing members 50 and 51 are placed in all of the regions 29R and 29S between the two U-ribs 20(A) and 20(B), this configuration can efficiently support the wheel load of the wheels 102 of the vehicle 100 running on the deck plate 14.

[0080] (First modified example of reinforcement structure 19) In this embodiment, the plate bonding portion 54, the transverse rib bonding portion 58, and the U-rib bonding portion 52 were directly bonded to each part of the steel deck 12, for example, but are not limited to this. For example, as shown in Figure 8, the plate bonding portion 54, the transverse rib bonding portion 58, and the U-rib bonding portion 52 may be bonded to the steel deck 12 with a high-elongation material 90 having a higher elongation than the reinforcing materials 50 and 51 sandwiched between each of the plate bonding portion 54, the transverse rib bonding portion 58, and the U-rib bonding portion 52.

[0081] For example, resin materials such as polyurea resin, urethane resin, or epoxy resin can be used as the high-stretch material 90. The high-stretch material 90 is applied directly to each part of the steel deck slab 12 as a putty material and then hardened.

[0082] In the first modified example, compared to a configuration in which the plate bonding portion 54, the transverse rib bonding portion 58, and the U-rib bonding portion 52 are all bonded in direct contact with the steel deck plate 12, the reinforcing members 50 and 51 follow the deformation of the steel deck plate 12, and peeling of the reinforcing members 50 and 51 is suppressed.

[0083] In the first modified example, the high-strength material 90 was sandwiched between each of the plate bonding section 54, the transverse rib bonding section 58, and the U-rib bonding section 52 and each part of the steel deck 12, but it is not limited to this. The high-strength material 90 may be sandwiched between a part of the plate bonding section 54, the transverse rib bonding section 58, and the U-rib bonding section 52 and each part of the steel deck 12, or it is sufficient that the high-strength material 90 is sandwiched between at least a part of the plate bonding section 54, the transverse rib bonding section 58, and the U-rib bonding section 52 and each part of the steel deck 12.

[0084] (Other variations of the reinforcement structure 19) In the reinforcing structure 19, the pair of reinforcing members 50, 51 were not placed in the region 29S where the wheels 102 of the vehicle 100 traveling on the deck plate 14 do not pass, or where the frequency of the wheels 102 passing is lower than in the first region 61, in the second region 62. However, this is not limited to this. For example, the pair of reinforcing members 50, 51 may be placed in all of the regions 29R, 29S between the two U-ribs 20(A), 20(B).

[0085] Furthermore, in the reinforcing structure 19, the pair of reinforcing members 50 and 51 were arranged in the region 29R between the two U-ribs 20(A) and 20(B), as shown in Figure 1, but this is not limited to this configuration. For example, the configuration may consist of only one reinforcing member 50 or one reinforcing member 51 being arranged in the region 29R between the two U-ribs 20(A) and 20(B). In other words, the reinforcing structure of the present invention only requires that at least one reinforcing member be arranged in the region 29R between the two U-ribs 20(A) and 20(B).

[0086] (Modified example of reinforcing material 50) In the reinforcing members 50 and 51, the plate bonding portion 54, the transverse rib bonding portion 58, and the U-rib bonding portion 52 were formed in a plate shape, but are not limited to this. For example, the reinforcing members 50 and 51 may be formed in a block shape (for example, a polygonal prism shape), and the reinforcing members 50 and 51 only need to have bonding portions that are bonded to the deck plate 14, the transverse rib 18, and the U-rib 20, respectively.

[0087] Furthermore, in the reinforcing members 50 and 51, the plate bonding portion 54, the transverse rib bonding portion 58, and the U-rib bonding portion 52 were each connected to one another by connecting portions 53 (see Figure 5), 55 (see Figure 4), and 57 (see Figure 6), respectively, but this is not limited to this. For example, in the reinforcing members 50 and 51, the plate bonding portion 54, the transverse rib bonding portion 58, and the U-rib bonding portion 52 may each be connected without using connecting portions 53, 55, and 57 (i.e., R-shaped portions).

[0088] Furthermore, in the reinforcing materials 50 and 51, the fibers in the plate bonding portion 54 were oriented in two directions: in the direction of the bridge axis and in the direction perpendicular to the bridge axis, but this is not limited to this. The fibers may be oriented in two intersecting directions, including directions other than the direction of the bridge axis and the direction perpendicular to the bridge axis, or they may be oriented in only one direction.

[0089] Furthermore, in the reinforcing members 50 and 51, the fibers in the U-rib bonding portion 52 were oriented in two directions: the bridge axis direction and the inclination direction M2 (vertical direction when viewed perpendicular to the bridge axis), but this is not limited to this. The fibers may be oriented in two intersecting directions, including directions other than the bridge axis direction and the inclination direction M2, or they may be oriented in only one direction.

[0090] Furthermore, in the reinforcing members 50 and 51, the fibers in the transverse rib bonding portion 58 were oriented in two directions: the inclined direction M2 and the orthogonal direction N2, but this is not limited to this. The fibers may be oriented in two intersecting directions, including directions other than the inclined direction M2 and the orthogonal direction N2, or they may be oriented in only one direction. Examples of directions other than the inclined direction M2 and the orthogonal direction N2 include the direction perpendicular to the bridge axis or the vertical direction. Therefore, the fibers may be oriented in two directions, for example, the inclined direction M2 or the orthogonal direction N2 and the direction perpendicular to the bridge axis or the vertical direction.

[0091] The present invention is not limited to the embodiments described above, and various modifications, changes, and improvements are possible without departing from the spirit of the invention. [Explanation of symbols]

[0092] 10 Bridges 11 Paving materials 12 Steel deck slab 14 Deck Plates 14A Top 14B Bottom 16 Main digit 18 Transverse Ribs 18A Web 18B flange 18C recess 18E Scallop 18F Scallop 19 Reinforcement structure 20 U-rib 22 Bottom wall section 23 Side wall section 25 Side wall section 29R area 29S area 50 Reinforcement material 51 Reinforcement material 52 U-rib bonding section 52A One end 53 Connecting part 54 Plate bonding area 54A Top 55 Connecting part 55P Center 57 Connecting part 58 Transverse rib bonding section 58A One end face 61 First Range 62 Second Range 71 Welded section 72 Welded parts 73 Welded section 90 High elongation material 100 vehicles 102 wheels

Claims

1. A reinforcing member for a steel deck plate having a deck plate, transverse ribs extending perpendicular to the bridge axis and welded to the lower surface of the deck plate, and longitudinal ribs intersecting the transverse ribs and extending in the direction of the bridge axis, and welded to the lower surface of the deck plate, A first adhesive portion is bonded to the lower surface of the deck plate, A second bonding portion bonded to the aforementioned transverse rib, A third adhesive portion is bonded to the aforementioned longitudinal rib, Equipped with, The second adhesive portion is formed in a plate shape with the bridge axis direction as the thickness direction, A reinforcing material made of fiber-reinforced plastic.

2. A reinforcing member for a steel deck plate having a deck plate, transverse ribs extending in a direction perpendicular to the bridge axis and welded to the lower surface of the deck plate, and longitudinal ribs intersecting the transverse ribs and extending in a direction in the bridge axis direction and welded to the lower surface of the deck plate, A first adhesive portion is bonded to the lower surface of the deck plate, A second bonding portion bonded to the aforementioned transverse rib, A third adhesive portion is bonded to the aforementioned longitudinal rib, Equipped with, The first adhesive portion, the second adhesive portion, and the third adhesive portion are formed in a plate shape. The first adhesive portion is connected to one end in the bridge axis direction to the upper end of the second adhesive portion. The first adhesive portion is connected to one end perpendicular to the bridge axis and the upper end of the third adhesive portion. One end of the third adhesive portion in the direction of the bridge axis and one end of the second adhesive portion in the direction perpendicular to the bridge axis are connected. Reinforcement material.

3. Each of the first adhesive portion, the second adhesive portion, and the third adhesive portion contains fibers oriented in two intersecting directions. The reinforcing material according to claim 2.

4. The third bonding portion is arranged along an inclined direction that is inclined with respect to the direction perpendicular to the bridge axis when viewed in the direction of the bridge axis. The second adhesive portion contains fibers oriented in a direction perpendicular to the inclination direction. The reinforcing material according to claim 2 or 3.

5. The third bonding portion is arranged along an inclined direction that is inclined with respect to the direction perpendicular to the bridge axis when viewed in the direction of the bridge axis. The second adhesive portion contains fibers oriented in the inclined direction. The reinforcing material according to any one of claims 2 to 4.

6. The reinforcing material is provided according to any one of claims 1 to 5, The first adhesive portion of the reinforcing material is bonded to the underside of the deck plate of the steel deck. The second adhesive portion of the reinforcing material is bonded to the transverse rib of the steel deck plate. The third adhesive portion of the reinforcing material is bonded to the longitudinal rib of the steel deck. Reinforcement structure.

7. The reinforcing members are arranged in pairs in the region between two adjacent longitudinal ribs perpendicular to the bridge axis. The third adhesive portion on one of the pair of reinforcing members is bonded to one of the two longitudinal ribs. The third adhesive portion of the other of the pair of reinforcing members is bonded to the other of the two longitudinal ribs. The reinforcing structure according to claim 6.

8. The pair of reinforcing members are arranged in the region that is located in the first range over which the wheels of a vehicle traveling on the deck plate pass. The reinforcing material is not placed in the area where the wheels of a vehicle traveling on the deck plate do not pass, or in the area where the frequency of such wheel passage is lower than in the first area, which is located in the second area. The reinforcing structure according to claim 7.

9. At least one of the first adhesive portion, the second adhesive portion, and the third adhesive portion is bonded to the steel deck plate with a high-elongation material having a higher elongation than the reinforcing material sandwiched between them. The reinforcing structure according to any one of claims 6 to 8.

Images