CN212077661U - To fatigue fracture steel bridge deck plate reinforced structure - Google Patents
To fatigue fracture steel bridge deck plate reinforced structure Download PDFInfo
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- CN212077661U CN212077661U CN201921319932.7U CN201921319932U CN212077661U CN 212077661 U CN212077661 U CN 212077661U CN 201921319932 U CN201921319932 U CN 201921319932U CN 212077661 U CN212077661 U CN 212077661U
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Abstract
The utility model provides a to fatigue fracture steel bridge deck plate reinforced structure, its technical scheme main points are: the steel bridge deck comprises a cracked steel bridge deck, carbon fiber reinforced battens, metal reinforced battens, shear connectors, a reinforcing mesh, an ultrahigh-performance concrete layer and an abrasion layer, wherein the carbon fiber reinforced battens are arranged on the cracked steel bridge deck, the shear connectors are welded on the metal reinforced battens, the metal reinforced battens with the shear connectors are arranged above the carbon fiber reinforced battens, the reinforcing mesh is placed on the cracked steel bridge deck, the ultrahigh-performance concrete layer is poured on the cracked steel bridge deck and is connected with the cracked steel bridge deck by covering the carbon fiber reinforced battens, the metal reinforced battens, the shear connectors and the reinforcing mesh, and the abrasion layer covers the top surface of the ultrahigh-performance concrete layer.
Description
Technical Field
The utility model relates to a be used for orthotropic steel bridge deck plate reinforced (rfd) bridge structures, especially a steel bridge deck plate reinforced structure to fatigue fracture.
Background
Since the advent of orthotropic steel bridge deck, the orthotropic steel bridge deck is favored by bridge designers due to the advantages of light dead weight, large ultimate bearing capacity, rapid construction, beautiful shape and the like, and is particularly suitable for large-span bridges. However, the local rigidity of the steel bridge deck is too low, and the problem of fatigue cracking is easy to occur in long-term operation. The bridge deck of the bridge is made of orthotropic steel bridge deck plates, and fatigue cracks appear in operation. Aiming at the above problems, various reinforcing schemes are proposed, wherein patent ZL201721470446.6 discloses a lightweight combined reinforcing structure without repairing fatigue-cracked steel bridge deck slab, which is characterized in that a steel plate with welded short studs is spot-welded on the cracked bridge deck slab, the short studs are welded on the bridge deck slab, and finally, ultra-high performance concrete is poured to form a combined reinforcing structure technology, so as to achieve the effect of reinforcing the cracked steel bridge deck slab.
However, the patent technology still has the following problems: 1. the steel plate strips are spot-welded on the cracked bridge deck slab and cannot be tightly combined with the cracked bridge deck slab, a gap is reserved between the steel plate strips and the cracked bridge deck slab, the corrosion risk exists, and the steel plate strips and the cracked bridge deck slab are difficult to bear force together; 2. the density of the steel plate strips is high, the dead weight of the bridge can be increased by adopting excessive steel plate strips, and the safe storage of the bridge is reduced; 3. a large number of studs are welded on the cracked steel bridge deck slab, welding residual stress is introduced, the risk of forming new cracks exists, and the bearing capacity of the steel bridge deck slab is further weakened.
SUMMERY OF THE UTILITY MODEL
Unlike direct application of ultra-high performance concrete to intact orthotropic steel deck slabs (or restoration to intact), the presence of fatigue cracks in fatigue-cracked steel deck slabs can greatly reduce the reinforcing effect of the steel deck slabs on the ultra-high performance concrete. If effective strengthening measures are not taken on the top surface of the cracked steel bridge deck slab, the tensile strength of the bottom surface of the ultrahigh-performance concrete layer is extremely low, and cracking is caused. Therefore, when the ultra-high performance concrete is applied to the cracked orthotropic steel bridge deck slab, the adverse effect of the steel plate cracks on the stress of the ultra-high performance concrete layer needs to be fully considered, reasonable strengthening measures are taken, and the key point is how to strengthen the bottom surface of the ultra-high performance concrete layer to prevent the concrete layer from cracking.
The utility model aims at providing a reinforced structure for the steel bridge deck slab which has been fatigue cracked; on the basis of the existing light combined reinforced structure, the crack resistance of the bottom surface of the ultra-high performance concrete thin layer above the cracked steel bridge deck is reinforced by additionally arranging carbon fiber reinforced battens and/or metal battens and improving the arrangement mode of a reinforcing mesh; the direct shear connection between the light combined structure and the original cracked steel bridge deck is enhanced by adopting various shear connection piece forms; by adopting a new construction process, the construction process is simplified, meanwhile, the damage to the cracked steel bridge deck is reduced, and the structure thoroughly eliminates the fatigue cracking diseases of the orthotropic steel bridge deck.
The utility model provides a technical scheme that its technical problem adopted is: the steel bridge deck comprises a cracked steel bridge deck, carbon fiber reinforced battens, metal reinforced battens, shear connectors, reinforcing mesh, an ultrahigh-performance concrete layer and an abrasion layer, wherein the carbon fiber reinforced battens are arranged on the cracked steel bridge deck, the shear connectors are welded on the metal reinforced battens, the metal reinforced battens with the shear connectors are arranged above the carbon fiber reinforced battens, the reinforcing mesh is placed on the cracked steel bridge deck, the ultrahigh-performance concrete layer is poured on the cracked steel bridge deck and is connected with the cracked steel bridge deck by covering the carbon fiber reinforced battens, the metal reinforced battens, the shear connectors and the reinforcing mesh, and the abrasion layer covers the top surface of the ultrahigh-performance concrete layer.
The utility model discloses still provide another kind to fatigue fracture steel bridge deck plate reinforced structure, its technical scheme is: the steel bridge deck comprises a cracked steel bridge deck, carbon fiber reinforced battens, metal reinforced battens, shear connectors, reinforcing mesh, an ultrahigh-performance concrete layer and an abrasion layer, wherein the carbon fiber reinforced battens are arranged on the cracked steel bridge deck, the shear connectors are welded on the metal reinforced battens, the metal reinforced battens with the shear connectors are directly welded or glued on the cracked steel bridge deck and are arranged in parallel with the carbon fiber reinforced battens in an alternating mode, the reinforcing mesh is placed on the cracked steel bridge deck, the ultrahigh-performance concrete layer is poured on the cracked steel bridge deck and is connected with the cracked steel bridge deck in a covering mode, the carbon fiber reinforced battens, the metal reinforced battens, the shear connectors and the reinforcing mesh are covered on the top face of the ultrahigh-performance concrete layer, and the abrasion layer covers the top face of the.
The utility model discloses a shear connector includes peg, T shaped steel, L shaped steel, channel-section steel, PBL trompil steel sheet, curved reinforcing bar connecting piece.
The utility model discloses a carbon fiber lath bonds at the steel decking top surface that has already cracked through organic structure glue, along horizontal bridge to arranging.
The metal reinforcing lath with the shear connector of the utility model can be directly welded or glued on the cracked steel bridge deck and is parallel to and alternately arranged with the carbon fiber reinforcing lath.
The reinforcing bar net comprises vertically and horizontally staggered's vertical reinforcing bar and horizontal reinforcing bar, the even equidistance of vertical reinforcing bar and horizontal reinforcing bar lay between the shear force connecting piece on the steel decking that has already split.
The utility model discloses a shear force connecting piece and the connected mode of having split steel decking are including adopting organic binder to bond, heating fusion welding.
The utility model discloses a carbon fiber lath bonds at the steel decking top surface that has already cracked through organic structure glue, along horizontal bridge to arranging.
The utility model discloses a reinforcing bar net is two-layer including indulging, horizontal bridge, and wherein horizontal bridge is arranged at the upper strata to the reinforcing bar, indulges the bridge and arranges in the lower floor to the reinforcing bar, indulges, the cross position of horizontal bridge to the reinforcing bar can adopt thin steel wire ligature, reinforcing bar net is located the top of carbon fiber reinforced plate and metal reinforced plate, and the reinforcing bar diameter is preferred 6-16mm, reinforcing bar net interval is preferred 25-100 mm.
The reinforcing mesh of the utility model can be three layers. The horizontal reinforcing bar of three-layer steel bar net structure is located steel bar net upper strata and lower floor, and vertical reinforcing bar is located steel bar net middle level, the horizontal reinforcing bar of upper strata and lower floor can increase the stretching resistance at same plumb line, the horizontal reinforcing bar of upper strata and lower floor is not at same plumb line, the ligature of the steel bar net crossing position of being convenient for.
The utility model has the advantages that the tensile capacity of the top surface of the upper layer of the transverse steel bar reinforced light composite structure concrete layer and the tensile capacity of the bottom surface of the lower layer of the transverse steel bar reinforced light composite structure concrete layer are improved; the upper layer of transverse steel bars can meet the structural requirement of overlarge tensile stress in the hogging moment area of the top surface of the concrete, and the lower layer of transverse steel bars can meet the requirement of protecting the bottom surface of the concrete by an original steel bridge deck with cracks; if the original steel bridge deck slab has no serious cracks, only upper-layer transverse steel bars can be arranged; if the tensile stress of the full-bridge hogging moment area is small, only the lower-layer transverse steel bars can be arranged.
The utility model discloses can adopt thin steel wire to carry out the ligature between the layer of reinforcing bar net and fix.
The utility model discloses an ultra high performance concrete layer is formed by ultra high performance concrete placement, ultra high performance concrete is that the water-cement ratio of steel fiber, no coarse aggregate, water-cement containing in the component is not more than 0.25, and compressive strength is greater than or equal to 100MPa, and the axial tension intensity is greater than or equal to 5 MPa's cement-based composite.
The utility model discloses a be equipped with wearing and tearing layer on the ultra high performance concrete layer, wearing and tearing layer includes that pitch class and resin class are two kinds.
The utility model discloses a characterized in that, including steel decking, shear connector, reinforcing bar net and the ultra high performance concrete layer of having split, the shear connector is fixed in on the steel decking of having split, reinforcing bar net vertically and horizontally staggered arrangement is on the steel decking of having split, the ultra high performance concrete layer is pour on the steel decking of having split, and covers shear connector, reinforcing bar net and steel decking, constitutes the light-duty combination bridge floor reinforced structure who solves the steel decking of having split and continue the fracture problem, eliminates the risk that the steel decking crack of having split continues to develop.
The utility model discloses whether the crack on the steel bridge deck board can be repaired according to actual conditions consideration, only need to adjust the arrangement of reinforcing bar net and the form of shear force connecting piece, can be three-layer reinforcing bar net or double-layer reinforcing bar net, can be the peg or T shaped steel or angle steel or L shaped steel or PBL (trompil steel plate connecting piece); the shear connector is fixed on a cracked steel bridge deck in advance, then the reinforcing mesh is laid and bound, and the ultrahigh-performance concrete layer is cast in place in situ, so that a complex construction process and high-investment construction equipment are not needed, the equipment investment is small, the operation is simple, the construction is easy, and the requirements on the quality of constructors and the construction process are low.
By changing the arrangement mode of the reinforcing steel bars, including the number of layers of the reinforcing steel bar mesh, the arrangement sequence of the transverse reinforcing steel bars and the longitudinal reinforcing steel bars and the thickness of the reinforcing steel bar protective layer, the transverse tensile stress of the bottom surface of the concrete layer cannot be reduced due to the cracks existing in the steel bridge deck, the concrete layer is prevented from cracking, and the stress condition of the combined bridge deck reinforcing structure is further improved; the improved light combined reinforced structure is adopted, the fatigue stress amplitude of the steel bridge deck is obviously reduced, the risk of continuous cracking of the steel bridge deck is further eliminated, and meanwhile, existing cracks can not be expanded and developed any more.
By adopting the light combined reinforcing structure for solving the problem of continuous cracking of the cracked steel bridge deck, the possibility of re-cracking of the cracked steel bridge deck is basically eliminated, the cracked steel bridge deck can still serve as a permanent component in the whole design period, the anti-fatigue life of the steel bridge deck is prolonged, and the durability of a bridge deck system is improved.
The utility model discloses adopt two kinds of materials of carbon fiber lath and metal lath to consolidate and strengthen the steel bridge deck that has ftractureed simultaneously. Compared with the prior art, the utility model has the advantages of it is following: 1) the carbon fiber lath has the advantages of low density, high tensile strength and the like, and compared with the pure metal lath strengthening technology, the technology of the utility model is helpful to reduce the dead weight of the bridge deck; 2) the carbon fiber lath and the steel plate have good bonding performance, and can be tightly bonded with a cracked steel bridge deck, so that a gap between the carbon fiber lath and the cracked steel bridge deck is avoided, and the combined effect of a reinforcing scheme is improved; 3) no matter the arrangement relation of the metal laths and the carbon fiber laths is superposition arrangement or parallel discontinuous arrangement, the steel bridge deck slab can be strengthened, so that the structural defect of the cracked steel bridge deck slab is overcome, and the cracking of the bottom surface of the ultra-high performance concrete layer is effectively prevented by the aid of the tension of the bottom surface of the ultra-high performance concrete layer.
The utility model discloses a shear force key form is various, can adopt the different grade type according to the design demand. Compared with the conventional stud, the shear keys such as T-shaped steel, L-shaped steel, channel steel, PBL perforated plates, bent steel bars and the like have the advantages of high shear strength, high rigidity, high efficiency and the like, and can be preferentially adopted. When the shear connector is used, the arrangement density of the shear connectors can be reduced, so that the workload of field welding can be reduced, and the interlaminar stress of the steel-ultrahigh-performance concrete can be effectively ensured. Therefore, compare with prior art, the utility model discloses reduced on-the-spot welding work volume, be favorable to the rapid construction that old bridge was consolidated.
The utility model discloses whether the crack on the steel bridge deck board can be considered to repair according to actual conditions. The utility model discloses adopt the carbon fiber lath and have the metal lath of welding shear force spare to consolidate the steel face board that has already cracked simultaneously, the structural defect that steel bridge face fatigue fracture brought can be overcome to two kinds of laths homoenergetic, improves the tensile strength of ultra high performance concrete layer bottom surface by a wide margin to prevent concrete layer bottom surface fracture. Meanwhile, longitudinal and transverse bridge-direction reinforcing meshes are arranged on the top surface of the ultra-high performance concrete layer, so that the tensile strength of the top surface of the concrete layer is improved, and the top surface of the concrete layer is prevented from cracking.
The utility model discloses a welding has shear force connecting piece on the lath, and the lath through welding or gluing with split the steel bridge deck board and be connected, can ensure that ultra high performance concrete layer and steel sheet are effectively combined to improve the local bending stiffness who splits the steel bridge deck board by a wide margin, showing and reducing the on-vehicle steel bridge face stress that arouses, eliminate the risk of steel bridge face fatigue fracture from the root, thereby prolong the life-span of steel bridge deck board.
The utility model has the advantages that: the utility model discloses basically, eliminated the possibility that the steel bridge deck that has cracked recracked, take cracked steel bridge deck still can regard as permanent component in the continued labour of whole design cycle, prolong its anti fatigue life, improve the durability of bridge floor system. The utility model discloses utilize two kinds of materials of carbon fiber lath, metal lath to consolidate the steel bridge face that has split, make full use of two kinds of building material's advantage, can consolidate the steel bridge face crack, can form the combined action with the ultra high performance concrete again, effectively prevent the fracture of ultra high performance concrete layer bottom surface. Therefore, the utility model has the advantages of link between the layer is reliable, fatigue resistance is good, the construction is simple and convenient, have very big use value and good economic benefits, have wide application prospect in the steel bridge construction field.
Drawings
Fig. 1 is a schematic structural diagram (one) of the present invention;
FIG. 2 is a side sectional view of FIG. 1;
fig. 3 is a schematic structural diagram (ii) of the present invention;
FIG. 4 is a side sectional view (one) of FIG. 3;
fig. 5 is a side sectional view (ii) of fig. 3.
In the figure: 1-cracked steel bridge deck, 2-carbon fiber reinforced laths, 3-metal reinforced laths, 4-shear connectors, 5-reinforcing mesh, 6-ultra-high performance concrete layer and 7-wearing layer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1, the present invention comprises a cracked steel deck, carbon fiber reinforced laths, metal reinforced laths, shear connectors, reinforcing mesh, ultra-high performance concrete layer, and wearing layer, the carbon fiber reinforced lath is bonded on the cracked steel panel through organic structural adhesive, the metal reinforced lath is welded with a shear connector, the metal reinforced lath with the shear connector is bonded above the carbon fiber reinforced lath by organic structural adhesive, the reinforcing mesh is placed on the cracked steel bridge deck slab and consists of longitudinal reinforcing steel bars and transverse reinforcing steel bars which are criss-cross, the ultrahigh-performance concrete layer is poured on the cracked steel bridge deck slab, and the carbon fiber reinforced laths, the metal reinforced laths, the shearing connectors and the reinforcing mesh are covered to be connected with the cracked steel bridge deck, and the wearing layer is covered on the top surface of the ultra-high performance concrete layer, as shown in fig. 1 to 5.
Embodiment 8, the carbon fiber lath of the present invention is adhered to the top surface of the cracked steel bridge deck by organic structural adhesive, and is arranged along the transverse bridge direction, referring to fig. 1 to 5, and the rest is the same as any one of the above embodiments or a combination of 2 above embodiments.
Embodiment 9, the utility model discloses a reinforcing bar net is including indulging, horizontal bridge to two-layer, and wherein horizontal bridge is arranged at the upper strata to the reinforcing bar, is arranged in the lower floor to the reinforcing bar, and the crossing position of indulging, horizontal bridge to the reinforcing bar can adopt thin steel wire ligature, and reinforcing bar net is located the top of carbon fiber reinforced plastic board and metal reinforcing plate, and the reinforcing bar diameter is preferred 6-16mm, and reinforcing bar net interval is preferred 25-100mm, refer to fig. 1-5, the combination of any one above or 2 above embodiments remains.
Embodiment 10, the utility model discloses three-layer steel reinforcement net structure's horizontal reinforcing bar is located steel reinforcement net upper strata and lower floor, and longitudinal reinforcement is located the steel reinforcement net middle level, the horizontal reinforcing bar of upper strata and lower floor can increase the stretching resistance at same plumb line, the horizontal reinforcing bar of upper strata and lower floor is not at same plumb line, increases moment of flexure district tensile stress, refer to fig. 1 to 5, the combination of any embodiment or 2 above the remaining same.
Embodiment 11, the utility model discloses the tensile strength of the top surface of the upper layer of the transverse steel bar reinforced light composite structure concrete layer, and the tensile strength of the bottom surface of the lower layer of the transverse steel bar reinforced light composite structure concrete layer; the upper layer of transverse steel bars can meet the structural requirement of overlarge tensile stress in the hogging moment area of the top surface of the concrete, and the lower layer of transverse steel bars can meet the requirement of protecting the bottom surface of the concrete by an original steel bridge deck with cracks; if the original steel bridge deck slab has no serious cracks, only upper-layer transverse steel bars can be arranged; if the full-bridge hogging moment region has a small tensile stress, only the lower layer of transverse steel bars can be arranged, as shown in fig. 1 to 5, and the rest is the same as any one of the above embodiments or a combination of 2 above embodiments.
Example 12, the layers of the steel bar net of the present invention can be bound and fixed by thin steel wires, as shown in fig. 1 to 5, which is the same as any of the above embodiments or a combination of 2 or more embodiments.
Embodiment 13, the utility model discloses an ultra high performance concrete layer is formed by ultra high performance concrete pouring, ultra high performance concrete is the cement-based composite material that contains steel fiber in the component, does not have coarse aggregate, the water-cement ratio is not more than 0.25, compressive strength is not less than 100MPa, axial tensile strength is not less than 5MPa, refer to fig. 1 to fig. 5, the combination of any preceding embodiment or 2 above embodiments is the rest.
Embodiment 14, the utility model discloses an be equipped with wearing layer on the ultra high performance concrete layer, wearing layer includes two kinds of asphalts class and resin class, refer to fig. 1 to 5, the combination of any above embodiment or 2 above embodiments is the rest.
Embodiment 15, the utility model discloses a characterized in that, including cracked steel decking, shear connector, reinforcing bar net and ultra high performance concrete layer, the shear connector is fixed in on the cracked steel decking, reinforcing bar net vertically and horizontally staggered arrangement is on the cracked steel decking, ultra high performance concrete layer is pour on the cracked steel decking, and covers shear connector, reinforcing bar net and steel decking, constitutes the light-duty combination bridge floor reinforced structure who solves the cracked steel decking and continue the fracture problem, eliminates the risk that the cracked steel decking crack continues to develop.
The utility model discloses whether the crack on the steel bridge deck board can be repaired according to actual conditions consideration, only need adjust the arrangement of reinforcing bar net and the form of shear force connecting piece, can be three-layer reinforcing bar net or double-layer reinforcing bar net, can be the peg or T shaped steel or angle steel or L shaped steel or PBL trompil steel sheet or curved steel bar connecting piece; the shear connector is fixed on a cracked steel bridge deck in advance, then the reinforcing mesh is laid and bound, and the ultrahigh-performance concrete layer is cast in place in situ, so that a complex construction process and high-investment construction equipment are not needed, the equipment investment is small, the operation is simple, the construction is easy, and the requirements on the quality of constructors and the construction process are low.
By changing the arrangement mode of the reinforcing steel bars, including the number of layers of the reinforcing steel bar mesh, the arrangement sequence of the transverse reinforcing steel bars and the longitudinal reinforcing steel bars and the thickness of the reinforcing steel bar protective layer, the transverse tensile stress of the bottom surface of the concrete layer cannot be reduced due to the cracks existing in the steel bridge deck, the concrete layer is prevented from cracking, and the stress condition of the combined bridge deck reinforcing structure is further improved; the improved light combined reinforced structure is adopted, the fatigue stress amplitude of the steel bridge deck is obviously reduced, the risk of continuous cracking of the steel bridge deck is further eliminated, and meanwhile, existing cracks can not be expanded and developed any more.
By adopting a light combined reinforcing structure for solving the problem of continuous cracking of the cracked steel bridge deck, the possibility of re-cracking of the cracked steel bridge deck is basically eliminated, the cracked steel bridge deck can still serve as a permanent component in the whole design period, the anti-fatigue life of the steel bridge deck is prolonged, and the durability of a bridge deck system is improved, which is shown in fig. 1 to 5 and is the same as any one of the embodiments or the combination of 2 embodiments.
Embodiment 16, the utility model discloses adopt two kinds of materials of carbon fiber lath and metal lath simultaneously to consolidate and strengthen the steel decking that has ftractureed. Compared with the prior art, the utility model has the advantages of it is following: 1) the carbon fiber lath has the advantages of low density, high tensile strength and the like, and compared with the pure metal lath strengthening technology, the technology of the utility model is helpful to reduce the dead weight of the bridge deck; 2) the carbon fiber lath and the steel plate have good bonding performance, and can be tightly bonded with a cracked steel bridge deck, so that a gap between the carbon fiber lath and the cracked steel bridge deck is avoided, and the combined effect of a reinforcing scheme is improved; 3) no matter the arrangement relationship of the metal laths and the carbon fiber laths is the overlapping arrangement or the parallel intermittent arrangement, the steel bridge deck with the cracked structure can be strengthened, so that the structural defects of the steel bridge deck with the cracked structure are overcome, and the cracking of the bottom surface of the ultra-high performance concrete layer is effectively prevented by cooperating with the tension of the bottom surface of the ultra-high performance concrete layer, as shown in fig. 1 to 5, the rest is the same as any one of the above embodiments or the combination of 2 above embodiments.
Embodiment 17, the utility model discloses a shear force key form is various, can adopt the different grade type according to the design demand. The shear keys such as the T-shaped steel, the L-shaped steel, the channel steel, the PBL perforated plate, the bent steel bars and the like have the advantages of high shear strength, high rigidity, high efficiency and the like, and the arrangement density of the shear keys can be reduced when the shear keys are used, so that the field welding workload can be reduced, and the interlaminar stress of the steel-ultrahigh-performance concrete can be effectively ensured. Therefore, compare with prior art, the utility model discloses reduced on-the-spot welding work volume, be favorable to the rapid construction that old bridge was consolidated.
The utility model discloses whether the crack on the steel bridge deck board can be considered to repair according to actual conditions. The utility model discloses adopt the carbon fiber lath and have the metal lath of welding shear force spare to consolidate the steel face board that has already cracked simultaneously, the structural defect that steel bridge face fatigue fracture brought can be overcome to two kinds of laths homoenergetic, improves the tensile strength of ultra high performance concrete layer bottom surface by a wide margin to prevent concrete layer bottom surface fracture. Meanwhile, longitudinal and transverse bridge-direction reinforcing meshes are arranged on the top surface of the ultra-high performance concrete layer, so that the tensile strength of the top surface of the concrete layer is improved, and the top surface of the concrete layer is prevented from cracking.
The utility model discloses a welding has shear force connecting piece on the lath, and the lath through welding or gluing with split the steel bridge deck board and be connected, can ensure super high performance concrete layer and steel sheet effective combination, thereby improve the local bending stiffness who splits the steel bridge deck board by a wide margin, show and reduce the on-vehicle steel bridge deck stress that arouses, eliminate the risk of steel bridge deck fatigue fracture from the root, thereby prolong the life-span of steel bridge deck board, refer to figure 1 to 5, the combination of any embodiment above the remaining with or 2 above embodiments.
Example 18, a metal lath with a welded shear key in this example was bonded to the top surface of a carbon fiber lath. The specific implementation steps are as follows:
1) preparing a carbon fiber lath and a metal lath in a factory, welding a stud on the metal lath, and then bonding the metal lath with the stud on the top surface of the carbon fiber lath through an organic structural adhesive to form a composite lath;
2) bonding the composite reinforced lath on the top surface of the cracked steel bridge deck plate, wherein the reinforced lath extends along the transverse bridge direction;
3) longitudinal bridge-direction reinforcing steel bars and transverse bridge-direction reinforcing steel bars are sequentially distributed, and the crossed positions of the reinforcing steel bar nets can be bound by thin steel wires;
4) pouring an ultrahigh-performance concrete layer, and maintaining;
the top surface of the ultra-high performance concrete layer is roughened and a wearing layer is poured, as shown in fig. 1 to 5, the rest of the above embodiments is the same as any one of the above embodiments or a combination of 2 above embodiments.
Example 19 metal strips with welded shear bonds in this example were bonded directly to the top surface of a cracked steel deck slab in parallel, alternating arrangement with carbon fibre strips bonded to the top surface of the cracked steel deck slab. The specific implementation steps are as follows:
1) preparing a carbon fiber strip and a metal strip in a factory, and welding studs on the metal strip; firstly, bonding a carbon fiber lath on the top surface of a cracked steel bridge deck plate through organic structural adhesive, and then bonding a metal lath with a stud nail on the top surface of the cracked steel bridge deck plate through the organic structural adhesive, wherein the metal lath and the carbon fiber lath are arranged in parallel and alternately; both the two types of battens extend along the transverse bridge direction;
2) longitudinal bridge-direction reinforcing steel bars and transverse bridge-direction reinforcing steel bars are sequentially distributed, and the crossed positions of the reinforcing steel bar nets can be bound by thin steel wires;
3) pouring an ultrahigh-performance concrete layer, and maintaining;
the top surface of the ultra-high performance concrete layer is roughened and a wearing layer is poured, as shown in fig. 1 to 5, the rest of the above embodiments is the same as any one of the above embodiments or a combination of 2 above embodiments.
Claims (7)
1. The utility model provides a to fatigue fracture steel bridge deck plate reinforced structure, characterized by: the steel bridge deck comprises a cracked steel bridge deck, carbon fiber reinforced battens, metal reinforced battens, shear connectors, reinforcing mesh, an ultrahigh-performance concrete layer and an abrasion layer, wherein the carbon fiber reinforced battens are arranged on the cracked steel bridge deck, the shear connectors are welded on the metal reinforced battens, the metal reinforced battens are arranged above the carbon fiber reinforced battens, the reinforcing mesh is placed on the cracked steel bridge deck, the ultrahigh-performance concrete layer is poured on the cracked steel bridge deck and covers the carbon fiber reinforced battens, the metal reinforced battens, the shear connectors and the reinforcing mesh to be connected with the cracked steel bridge deck, and the abrasion layer covers the top surface of the ultrahigh-performance concrete layer.
2. The utility model provides a to fatigue fracture steel bridge deck plate reinforced structure, characterized by: the steel bridge comprises a cracked steel bridge deck, carbon fiber reinforced battens, metal reinforced battens, shear connectors, reinforcing mesh, an ultrahigh-performance concrete layer and an abrasion layer, wherein the carbon fiber reinforced battens are arranged on the cracked steel bridge deck, the shear connectors are welded on the metal reinforced battens, the metal reinforced battens with the shear connectors are directly welded or glued on the cracked steel bridge deck and are arranged in parallel with the carbon fiber reinforced battens in an alternating mode, the reinforcing mesh is placed on the cracked steel bridge deck, the ultrahigh-performance concrete layer is poured on the cracked steel bridge deck and is connected with the cracked steel bridge deck in a covering mode, the carbon fiber reinforced battens, the metal reinforced battens, the reinforcing mesh and the reinforcing mesh are covered on the top surface of the ultrahigh-performance concrete layer.
3. A reinforcing arrangement for a fatigue cracked steel deck slab as claimed in claim 1 or 2, wherein: the reinforcing mesh consists of longitudinal reinforcing steel bars and transverse reinforcing steel bars which are crisscrossed, and the longitudinal reinforcing steel bars and the transverse reinforcing steel bars are uniformly and equidistantly arranged between the shear connectors on the cracked steel bridge deck.
4. A reinforcing arrangement for a fatigue cracked steel deck slab as claimed in claim 1 or 2, wherein: the carbon fiber reinforced lath is bonded on the top surface of the cracked steel bridge deck plate through organic structural adhesive and is arranged along the transverse bridge direction.
5. A reinforcing arrangement for a fatigue cracked steel deck slab as claimed in claim 1 or 2, wherein: the reinforcing mesh comprises two layers of longitudinal and transverse bridge directions, wherein the transverse bridge direction reinforcing steel bars are arranged on the upper layer, the longitudinal bridge direction reinforcing steel bars are arranged on the lower layer, the crossed positions of the longitudinal and transverse bridge direction reinforcing steel bars can be bound by thin steel wires, the reinforcing mesh is positioned above the carbon fiber reinforced plate and the metal reinforced plate, the diameter of each reinforcing steel bar is 6-16mm, and the interval between the reinforcing meshes is 25-100 mm.
6. A reinforcing arrangement for a fatigue cracked steel deck slab as claimed in claim 1 or 2, wherein: and the ultra-high performance concrete layer is provided with an abrasion layer, and the abrasion layer comprises two types of asphalt and resin.
7. A reinforcing arrangement for a fatigue cracked steel deck slab as claimed in claim 1 or 2, wherein: the shear connector comprises a stud, T-shaped steel, L-shaped steel, channel steel, a PBL perforated steel plate and a bent steel bar connector.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821608736 | 2018-09-30 | ||
| CN2018216087367 | 2018-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212077661U true CN212077661U (en) | 2020-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921319932.7U Active CN212077661U (en) | 2018-09-30 | 2019-08-15 | To fatigue fracture steel bridge deck plate reinforced structure |
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| Country | Link |
|---|---|
| CN (1) | CN212077661U (en) |
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2019
- 2019-08-15 CN CN201921319932.7U patent/CN212077661U/en active Active
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