Corrugated steel web reinforced splicing structure of corrugated steel web composite beam and construction method

Abstract

The present application relates to corrugated steel web reinforcement, splicing structure and construction method of corrugated steel web composite beam, the reinforcement structure includes two rows of fixed FRP plate, a prefabricated profiled steel plate-concrete composite plate and a steel beam; the inner side of the fixed FRP plate is bonded to the corrugated steel web by adhesive; the prefabricated profiled steel plate-concrete composite plate is embedded between the two rows of fixed FRP plate; the upper and lower ends of the steel beam are respectively fixedly connected with the outer sides of the two fixed FRP plates vertically aligned. The reinforcement structure improves the shear overall buckling bearing capacity of the corrugated steel web by the prefabricated profiled steel plate-concrete composite plate, and reduces the influence of the prefabricated profiled steel plate-concrete composite plate on the corrugation effect by the low shear connection system composed of low modulus material and fixed FRP plate.

Description

Technical Field

[0001] This invention relates to the field of corrugated steel web reinforcement technology for corrugated steel web composite beams, and particularly to corrugated steel web reinforcement, splicing structures, and construction methods for corrugated steel web composite beams. Background Technology

[0002] Corrugated steel web composite beams are characterized by high prestressing efficiency and light structural weight, and are currently used in bridge engineering. In the early stages of bridge construction, due to issues in construction, design, and management, as well as changes in bridge loads, corrugated steel web composite beam bridges in operation require further reinforcement to meet future service requirements.

[0003] Corrugated steel webs bear most of the shear loads in composite beams. As the dimensions of the corrugated steel webs change, they may experience overall buckling failure, local buckling failure, and combined buckling failure.

[0004] For long-span corrugated steel web composite beam bridges, the overall shear buckling failure is more likely due to the height of the web. To improve the shear capacity of long-span corrugated steel web composite beam bridges, concrete can be poured on the outside of the corrugated steel web and firmly connected to it. However, this method is prone to concrete cracking and affects the wrinkling effect of the corrugated steel web in the poured concrete section. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a corrugated steel web reinforcement, splicing structure, and construction method for corrugated steel web composite beams, thereby improving the overall shear buckling bearing capacity of long-span corrugated steel web composite beam bridges.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This invention provides a corrugated steel web reinforcement structure for a composite beam with corrugated steel web, comprising two rows of fixed FRP plates arranged along the longitudinal direction of the corrugated steel web, a precast profiled steel sheet-concrete composite slab arranged along the longitudinal direction of the corrugated steel web, and a vertically arranged steel beam; each row of fixed FRP plates includes at least two fixed FRP plates spaced apart, the number of fixed FRP plates in the upper and lower rows is the same and they are vertically aligned, and the inner sides of the fixed FRP plates are bonded to the corrugated steel web by adhesive; the precast profiled steel sheet-concrete composite slab... The composite plate is embedded between two rows of fixed FRP plates. The profiled steel plate on the inner side of the precast profiled steel plate-concrete composite plate is tightly attached to the corrugated steel web. The steel beam is correspondingly set with two vertically aligned fixed FRP plates and the positions are aligned. The inner side of the steel beam is embedded in the reinforced concrete slab on the outer side of the precast profiled steel plate-concrete composite plate through a connecting plate. The part of the connecting plate embedded in the concrete is wrapped with a low elastic modulus material. The outer side of the fixed FRP plate extends to the top or bottom of the steel beam. The upper and lower ends of the steel beam are fixedly connected to the outer sides of the corresponding upper and lower fixed FRP plates, respectively.

[0008] As one specific implementation method, the profiled steel sheet and the reinforced concrete slab of the precast profiled steel sheet-concrete composite slab are fixedly connected by studs.

[0009] As one specific implementation method, the steel beam is a vertically arranged I-beam, the connecting plate is a T-shaped plate, the inner flange of the I-beam is welded with a T-shaped plate, and the web of the T-shaped plate is wrapped with a low-modulus material.

[0010] As one specific implementation, the fixed FRP plate is made by pultrusion process and includes a fixing head that matches the corrugated groove of the corrugated steel web and an extended rib plate connected to the fixing head. The fixing head is bonded in the corrugated groove, and the extended rib plate extends to the top or bottom of the steel beam.

[0011] As one specific implementation method, bolt holes are opened on the outer side of the extended rib plate, and bolt holes are opened at the upper and lower ends of the middle web of the I-beam. The extended rib plate and the I-beam are fixedly connected by connecting steel plates and bolts.

[0012] In one specific implementation, the fixing head is formed by connecting an inner edge plate near the corrugated groove, an outer edge plate away from the corrugated groove, and a side edge plate located between the inner edge plate and the outer edge plate to form a trapezoidal frame. The extended rib plate is connected to the middle of the outer edge plate and extends into the trapezoidal frame to connect with the middle of the inner edge plate. The trapezoidal frame is provided with two oblique inner rib plates that connect the two ends of the inner edge plate and the intersection of the extended rib plate and the outer edge plate.

[0013] In one specific implementation, the height of the trapezoidal frame is equal to the wave height of the corrugated steel web. The inner edge plate and the side edge plates on both sides combine to form a shape consistent with the corrugated groove shape of the corrugated steel web. The length of the inner edge plate is equal to the length of the straight section of the corrugated groove of the corrugated steel web, and the length of the side edge plate is equal to the length of the inclined section of the corrugated groove of the corrugated steel web.

[0014] The present invention also provides a corrugated steel web reinforcement splicing structure for corrugated steel web composite beams, characterized in that: it includes two or more corrugated steel web reinforcement structures for corrugated steel web composite beams, at least one end of the profiled steel sheet extends beyond the corresponding end of the reinforced concrete slab, at least one end of the reinforcing steel in the reinforced concrete slab extends beyond the corresponding end of the reinforced concrete slab, the protruding profiled steel sheets of adjacent precast profiled steel sheet-concrete composite slabs are welded together to form a whole, the reinforcing steel in the reinforced concrete slabs of adjacent precast profiled steel sheet-concrete composite slabs are staggered, and the connection is achieved by casting UHPC in place at the crest and straight section of the corrugated steel web.

[0015] The profiled steel sheet extends 0.5 times the length of the corrugated steel web along the length of the reinforced concrete slab, forming a straight section. The reinforcing bar extends 0.8 times the length of the corrugated steel web along the length of the reinforced concrete slab, forming a straight section.

[0016] This invention also provides a construction method for a corrugated steel web reinforcement splicing structure for a corrugated steel web composite beam. The corrugated steel web reinforcement splicing structure for the corrugated steel web composite beam includes two or more corrugated steel web reinforcement structures for the corrugated steel web composite beam. The end of the profiled steel sheet extends to the end of the corresponding end of the reinforced concrete slab. The end of the reinforcing bar in the reinforced concrete slab extends to the end of the corresponding end of the reinforced concrete slab. The protruding profiled steel sheets of adjacent precast profiled steel sheet-concrete composite slabs are welded together to form a whole. The reinforcing bars of the reinforced concrete slabs of adjacent precast profiled steel sheet-concrete composite slabs are staggered and connected by casting UHPC in place at the crest and straight section of the corrugated steel web.

[0017] The construction method includes the following steps:

[0018] S1. Produce profiled steel sheets, I-beams with bolt holes, fixed FRP sheets and T-shaped sheets in the factory, weld the I-beams and T-shaped sheets, wrap the outside of the T-shaped sheets with low elastic modulus material, place the welded I-beams and T-shaped sheets into the mold frame, lay the reinforcing bars, pour concrete on the outside of the profiled steel sheets, and form precast components after the concrete reaches the design strength.

[0019] S2. Apply adhesive to the fixing head of the lower row of fixed FRP plates, and before the adhesive hardens, stick the lower row of fixed FRP plates to the designed position in the corrugated groove of the corrugated steel web.

[0020] S3. Hoist the precast profiled steel sheet-concrete composite slab onto the lower row of fixed FRP slabs. Use temporary supports to tighten the precast profiled steel sheet-concrete composite slabs to the corrugated steel web. Apply adhesive to the fixing heads of the upper row of fixed FRP slabs. Before the adhesive hardens, paste the upper row of fixed FRP slabs into the designed positions in the corrugated grooves of the corrugated steel web. Drill bolt holes at the extended ribs, install the connecting steel plates, install bolts through the extended ribs, connecting steel plates, and I-beams, tighten the bolts to connect the I-beams and fixed FRP slabs together, and remove the temporary supports.

[0021] S4. Weld the protruding parts of the profiled steel sheets of adjacent precast profiled steel sheet-concrete composite slabs, set up formwork at the joint between adjacent precast profiled steel sheet-concrete composite slabs, pour UHPC, connect the adjacent precast profiled steel sheet-concrete composite slabs together, and complete the shear reinforcement of the corrugated steel web composite beam.

[0022] The present invention has the following beneficial effects:

[0023] This invention improves the overall shear buckling bearing capacity of the corrugated steel web by constraining the out-of-plane deformation of the corrugated steel web through a prefabricated profiled steel sheet-concrete composite slab, and reduces the amount of concrete used by utilizing the profiled steel sheet, thereby reducing the weight of the newly added reinforcement.

[0024] Compared to traditional connections between concrete and corrugated steel webs with strong shear resistance, this low-shear connection stiffness system, composed of a low-modulus material and a fixed FRP plate, reduces the reinforcement of the axial stiffness of the corrugated steel web by the precast profiled steel sheet-concrete composite slab, thus minimizing the impact of the reinforced structure on the wrinkling effect of the corrugated steel web. Simultaneously, it reduces the load borne by the precast profiled steel sheet-concrete composite slab, improving the crack resistance of the newly added concrete portion of the reinforced structure.

[0025] The fixed FRP sheet is connected to the corrugated steel web via epoxy resin, avoiding damage to the reinforced corrugated steel web caused by drilling or welding. Compared to pre-drilling bolt holes for both the I-beams and the fixed FRP sheet before on-site splicing, the method of drilling bolt holes for the I-beams in the factory and drilling bolt holes for the fixed FRP sheet on-site during construction reduces the accuracy requirements for splicing. FRP sheets produced using the pultrusion process are easy to manufacture in factories. The resulting FRP sheets are anisotropic materials, with fibers primarily distributed in one direction. In the reinforced structure, the vertical direction is the fiber direction, resulting in a high modulus of elasticity, while the longitudinal direction of the beam is the non-fiber direction, resulting in a low modulus of elasticity.

[0026] The steel and FRP components in the reinforcement structure use standardized dimensions, facilitating industrial production and assembly. The use of prefabricated components manufactured in the factory and joined on-site accelerates the work on the bridge. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the reinforcement device of the present invention in conjunction with the composite beam;

[0028] Figure 2 This is a structural diagram of the reinforced structure;

[0029] Figure 3 Schematic diagram of a reinforced FRP component;

[0030] Figure 4 A schematic diagram of the structure connecting precast profiled steel sheet-concrete composite slab and steel beam;

[0031] Figure 5 This is a structural schematic diagram of a steel beam. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0033] Example 1

[0034] See Figures 1 to 5 A corrugated steel web reinforcement structure for corrugated steel web composite beams includes two rows of fixed FRP plates 11 arranged along the longitudinal direction of the corrugated steel web 100, at least one precast profiled steel plate-concrete composite slab 2 arranged along the longitudinal direction of the corrugated steel web 100, and a vertically arranged steel beam 23 connecting the fixed FRP plates 11 and the precast profiled steel plate-concrete composite slab 2.

[0035] Each row of fixed FRP plates 11 includes at least two fixed FRP plates 11 formed by pultrusion process and spaced apart. The number of fixed FRP plates 11 in the upper and lower rows is the same and they are vertically aligned. The fixed FRP plate 11 includes a fixing head 110 that matches the shape and size of the corrugated groove of the corrugated steel web 100 and a transversely arranged extended rib plate 111 that is located outside the fixing head 110 and preferably integrally formed with the fixing head 110. In this embodiment, the fixing head 110 is formed by connecting an inner edge plate 112 near the corrugated groove side, an outer edge plate 113 away from the corrugated groove side, and a side edge plate 114 located between the inner edge plate 112 and the outer edge plate 113 to form a trapezoidal frame. The extended rib plate 111 is connected to the middle of the outer edge plate 113 and extends into the trapezoidal frame to connect with the middle of the inner edge plate 112. The trapezoidal frame is provided with two oblique inner ribs 115 that connect the two ends of the inner edge plate 112 and the intersection of the extended rib plate 111 and the outer edge plate 113. The extended rib plate 111 has bolt holes on its outer side outside the trapezoidal frame.

[0036] In a preferred embodiment, the height of the trapezoidal frame (i.e., the length of the extended rib 111 located within the trapezoidal frame) is equal to the wave height of the corrugated steel web 100. The inner edge plate 112 and the side edge plates 114 on both sides combine to form a shape consistent with the corrugated groove shape of the corrugated steel web 100. The length of the inner edge plate 112 is equal to the length of the straight section of the corrugated groove of the corrugated steel web 100, and the length of the side edge plate 114 is equal to the length of the inclined section of the corrugated groove of the corrugated steel web 100.

[0037] The fixed FRP sheet 11 is laterally bonded to the corrugated groove of the corrugated steel web 100 using an adhesive such as epoxy resin applied to the inner edge plate 112 and the two side edge plates 114 of the fixing head 110. Two fixed FRP sheets 11 are bonded to the upper and lower positions within the same corrugated groove of the corrugated steel web 100 using adhesive. After bonding, the fixed FRP sheet 11 is perpendicular to the approximate plane formed by the corrugated steel web 100. A space is reserved between the upper and lower rows of fixed FRP sheets 11 to accommodate the precast profiled steel sheet-concrete composite slab 2.

[0038] The precast profiled steel sheet-concrete composite slab 2 includes a profiled steel sheet 21 and a reinforced concrete slab 22 arranged sequentially from the inner side near the corrugated steel web 100 to the outer side. The profiled steel sheet 21 and the reinforced concrete slab 22 are connected together by bolts, studs, or other fasteners. In this embodiment, the length of the precast profiled steel sheet-concrete composite slab 2 is 2 to 3 wavelengths of the corrugated steel web 100. Preferably, at least one end of the profiled steel sheet 21 extends beyond the corresponding end of the reinforced concrete slab 22, and at least one end of the reinforcing bar 221 in the reinforced concrete slab 22 extends beyond the corresponding end of the reinforced concrete slab 22. As a preferred embodiment, the profiled steel sheet 21 extends 0.5 times the length of the crest of the corrugated steel web 100 along the length direction of the reinforced concrete slab 22, and the reinforcing bar 221 extends 0.8 times the length of the crest of the corrugated steel web 100 along the length direction of the reinforced concrete slab 22.

[0039] The steel beam 23 is correspondingly and aligned with two vertically aligned fixed FRP plates. In this embodiment, the steel beam 23 is a vertically arranged I-beam 231. The inner flange of the I-beam 231 is attached to the outer surface of the reinforced concrete slab 22. Bolt holes are respectively opened at the upper and lower ends of the middle web of the I-beam 231. Two or more preferred T-shaped plates 232 are welded to the inner flange of the I-beam 231 at intervals. The web ends of the T-shaped plates 232 are connected to the inner plates of the I-beam 231. The web of the T-shaped plates 232 is wrapped with a low-modulus material 233 such as foam adhesive. The T-shaped plates 232 and the low-modulus material 233 are embedded in the reinforced concrete slab 22 by on-site casting, so that each steel beam 23 and the reinforced concrete slab 22 are integrated.

[0040] The precast profiled steel sheet-concrete composite slab 2 is embedded between two rows of fixed FRP sheets 11. The profiled steel sheet 21 of the precast profiled steel sheet-concrete composite slab 2 is tightly attached to the corrugated steel web 100. The extended ribs 111 of the fixed FRP sheets 11 are located directly above or below the middle web of the I-beam 231, and the outer side of the extended ribs 111 is flush with the outer flange of the I-beam 231. The extended ribs 111 and the I-beam 231 are fixedly connected by bolts through connecting steel plates 234.

[0041] The precast profiled steel sheet-concrete composite slab 2 is connected to the corrugated steel web 100 via I-beams 231. The I-beams 231 serve both as a connector and as a means to increase the out-of-plane stiffness of the precast profiled steel sheet-concrete composite slab 2. Because the precast profiled steel sheet-concrete composite slab 2 constrains the out-of-plane deformation of the corrugated steel web 100, it reduces the calculated height of the overall buckling of the corrugated steel web 100 and increases its overall buckling bearing capacity. Furthermore, the low-modulus elastic material 233 between the I-beams 231 and the reinforced concrete slab 22 reduces the shear stiffness between the precast profiled steel sheet-concrete composite slab 2 and the corrugated steel web 100. Simultaneously, the fixed FRP plate 11, produced using a pultrusion process, has a lower modulus of elasticity in the longitudinal direction of the beam, which also reduces the shear stiffness between the precast profiled steel sheet-concrete composite slab 2 and the corrugated steel web 100. By using the low shear stiffness connection between the precast profiled steel sheet-concrete composite slab 2 and the corrugated steel web 100, the stress on the precast profiled steel sheet-concrete composite slab 2 under axial and bending loads is reduced, the crack resistance of the newly added concrete part is enhanced, and the influence of the precast profiled steel sheet-concrete composite slab on the wrinkling effect of the corrugated steel web composite beam 1 is reduced.

[0042] Example 2

[0043] See Figure 5 The corrugated steel web reinforcement splicing structure for corrugated steel web composite beams includes two or more corrugated steel web reinforcement structures as shown in Example 1. The protruding corrugated steel sheets 21 of adjacent precast corrugated steel sheet-concrete composite slabs 2 are welded together to form a whole. The reinforcing bars 221 of the reinforced concrete slabs 22 of adjacent precast corrugated steel sheet-concrete composite slabs 2 are staggered and connected by casting UHPC (ultra-high performance concrete) in place at the crest and straight section of the corrugated steel web 100.

[0044] This embodiment also provides a construction method for a corrugated steel web reinforcement device for corrugated steel web composite beams, including the following steps:

[0045] S1. In the factory, profiled steel sheet 21, I-beam 231 with bolt holes, fixed FRP sheet 11 and T-shaped plate 232 are manufactured. The I-beam 231 and T-shaped plate 232 are welded together, and low elastic modulus material 233 is wrapped around the outside of T-shaped plate 232. The welded I-beam 231 and T-shaped plate 232 are placed in the mold frame, and steel bars 221 are laid. Concrete is poured on the outside of profiled steel sheet 21. After the concrete reaches the design strength, a precast component is formed.

[0046] S2. Apply adhesive to the inner edge plate 112 and side edge plate 114 of the lower row of fixed FRP plate 11, and paste the lower row of fixed FRP plate 11 into the designed position in the corrugated groove of the corrugated steel web 100 before the adhesive solidifies.

[0047] S3. Hoist the precast profiled steel sheet-concrete composite slab 2 onto the bottom row of fixed FRP slabs 11. Use temporary supports to tighten the precast profiled steel sheet-concrete composite slab 2 against the corrugated steel web 100. Apply adhesive to the fixing head of the upper row of fixed FRP slabs 11. Before the adhesive solidifies, paste the upper row of fixed FRP slabs 11 into the designed position in the corrugated groove of the corrugated steel web 100. Drill bolt holes at the extended ribs 111, install the connecting steel plate 234, install bolts through the extended ribs 111, connecting steel plate 234 and I-beam 231, tighten the bolts to connect the I-beam 231 and the fixed FRP slab 11 together, and remove the temporary supports.

[0048] S4. Weld the protruding parts of the profiled steel sheet 21 of the adjacent precast profiled steel sheet-concrete composite slab 2, set up a template at the joint between the adjacent precast profiled steel sheet-concrete composite slab 2, pour UHPC, connect the adjacent precast profiled steel sheet-concrete composite slab 2 together, and complete the shear reinforcement of the corrugated steel web 100 composite beam.

[0049] The above description is merely a specific embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A corrugated steel web reinforcement structure for a corrugated steel web composite beam, characterized by: The application relates to a wave-shaped steel web (100) and a vertical steel beam (23), and comprises two rows of fixed FRP plates (11) arranged along the longitudinal direction of the wave-shaped steel web (100), a prefabricated profiled steel plate-concrete composite plate (2) arranged along the longitudinal direction of the wave-shaped steel web (100), and the vertical steel beam (23); each row of fixed FRP plates (11) comprises at least two fixed FRP plates (11) arranged at intervals, the number of the fixed FRP plates (11) in the two rows is the same and the fixed FRP plates (11) in the two rows are vertically aligned, the inner side of the fixed FRP plate (11) is bonded to the wave-shaped steel web (100) through an adhesive; the prefabricated profiled steel plate-concrete composite plate (2) is embedded between the two rows of fixed FRP plates (11), and the profiled steel plate (21) on the inner side of the prefabricated profiled steel plate-concrete composite plate (2) is tightly attached to the wave-shaped steel web (100); the vertical steel beam (23) is arranged in correspondence with the two fixed FRP plates (11) vertically aligned and is positionally aligned, the inner side of the vertical steel beam (23) is embedded in a reinforced concrete plate (22) on the outer side of the prefabricated profiled steel plate-concrete composite plate (2) through a connecting plate, the part of the connecting plate embedded in the concrete is wrapped with a low-elastic modulus material (233), the outer side of the fixed FRP plate (11) extends above or below the vertical steel beam (23), and the upper and lower ends of the vertical steel beam (23) are fixedly connected to the outer sides of the corresponding upper and lower fixed FRP plates (11) respectively.

2. Corrugated steel web reinforcing structure for a corrugated steel web composite beam according to claim 1, characterized in that: The profiled steel plate (21) of the prefabricated profiled steel plate-concrete composite plate (2) is fixedly connected to the reinforced concrete plate (22) through a stud.

3. Corrugated steel web reinforcing structure for a corrugated steel web composite beam according to claim 1, characterized in that: The vertical steel beam (23) is a vertical I-shaped steel (231), the connecting plate is a T-shaped plate (232), the inner side flange plate of the I-shaped steel (231) is welded with the T-shaped plate (232), and the web of the T-shaped plate (232) is wrapped with the low-elastic modulus material (233).

4. Corrugated steel web reinforcing structure for a corrugated steel web composite beam according to claim 3, characterized in that: The fixed FRP plate (11) is made of a pultrusion process and comprises a fixed head (110) matched with the wave-shaped groove of the wave-shaped steel web (100) and an outer extension rib plate (111) connected with the fixed head (110), the fixed head (110) is bonded in the wave-shaped groove, and the outer side of the outer extension rib plate (111) extends above or below the vertical steel beam (23).

5. Corrugated steel web reinforcing structure for a corrugated steel web composite beam according to claim 4, characterized in that: The outer side of the outer extension rib plate (111) is provided with bolt holes, the upper and lower ends of the middle web of the I-shaped steel (231) are respectively provided with bolt holes, and the outer extension rib plate (111) and the I-shaped steel (231) are fixedly connected through a connecting steel plate (234) and bolts.

6. Corrugated steel web reinforcing structure for corrugated steel web composite beams according to claim 4, characterized in that: The fixed head (110) is connected to form a trapezoidal frame by an inner edge plate (112) close to the side of the wave-shaped groove, an outer edge plate (113) away from the side of the wave-shaped groove and a side edge plate (114) between the inner edge plate (112) and the outer edge plate (113), the outer extension rib plate (111) is connected with the middle part of the outer edge plate (113) and extends into the trapezoidal frame to be connected with the middle part of the inner edge plate (112), and two inclined inner rib plates (115) are arranged in the trapezoidal frame and connected with the ends of the inner edge plate (112) and the intersection position of the outer extension rib plate (111) and the outer edge plate (113).

7. Corrugated steel web reinforcing structure for a corrugated steel web composite beam according to claim 6, characterized in that: The height of the trapezoidal frame is equal to the wave height of the corrugated steel web (100), the inner edge plate (112) and the side edge plates (114) on both sides combine to form a shape consistent with the shape of the corrugated groove of the corrugated steel web (100), the length of the inner edge plate (112) is equal to the length of the straight amplitude section of the corrugated groove of the corrugated steel web (100), and the length of the side edge plate (114) is equal to the length of the inclined amplitude section of the corrugated groove of the corrugated steel web (100).

8. A corrugated steel web reinforcement splice structure for a corrugated steel web composite beam, characterized by: The corrugated steel web reinforcing structure for the corrugated steel web composite beam comprises two or more corrugated steel web reinforcing structures according to any one of claims 1-7, the end of the profiled steel sheet (21) extends beyond the end of the corresponding end of the reinforced concrete slab (22), at least one end of the reinforcing steel bar (221) in the reinforced concrete slab (22) extends beyond the end of the corresponding end of the reinforced concrete slab (22), the protruding profiled steel sheets (21) of adjacent prefabricated profiled steel sheet-concrete composite slabs (2) are connected into a whole by welding, the reinforcing steel bars (221) of the reinforced concrete slabs (22) of adjacent prefabricated profiled steel sheet-concrete composite slabs (2) are arranged staggered, and the connection is achieved by casting UHPC at the straight amplitude section of the wave crest of the corrugated steel web (100).

9. Corrugated steel web stiffening splice structure for a corrugated steel web composite beam according to claim 8, characterized in that: The profiled steel sheet (21) protrudes along the length direction of the reinforced concrete slab (22) by 0.5 times the length of the straight amplitude section of the wave crest of the corrugated steel web (100), and the reinforcing steel bar (221) protrudes along the length direction of the reinforced concrete slab (22) by 0.8 times the length of the straight amplitude section of the wave crest of the corrugated steel web (100).

10. A construction method for a corrugated steel web reinforcing splicing structure for a corrugated steel web composite beam, the corrugated steel web reinforcing splicing structure for the corrugated steel web composite beam comprising two or more corrugated steel web reinforcing structures according to claim 5, the end of the profiled steel sheet (21) extending beyond the end of the corresponding end of the reinforced concrete slab (22), at least one end of the reinforcing steel bar (221) in the reinforced concrete slab (22) extending beyond the end of the corresponding end of the reinforced concrete slab (22), the protruding profiled steel sheets (21) of adjacent prefabricated profiled steel sheet-concrete composite slabs (2) being connected into a whole by welding, the reinforcing steel bars (221) of the reinforced concrete slabs (22) of adjacent prefabricated profiled steel sheet-concrete composite slabs (2) being arranged staggered, and the connection being achieved by casting UHPC at the straight amplitude section of the wave crest of the corrugated steel web (100). The construction method comprises the following steps: S1, producing the profiled steel sheet (21), the I-shaped steel (231) with bolt holes, the fixed FRP plate (11), and the T-shaped plate (232) in a factory, welding the I-shaped steel (231) and the T-shaped plate (232), wrapping the low-elastic-module material (233) outside the T-shaped plate (232), placing the welded I-shaped steel (231) and the T-shaped plate (232) into a mold frame, laying the reinforcing steel bar (221), pouring concrete outside the profiled steel sheet (21), and forming a prefabricated component after the concrete reaches the design strength. S2, smearing adhesive at the fixing head of the lower row of fixed FRP plates (11), and pasting the lower row of fixed FRP plates (11) in the designed position in the corrugated groove of the corrugated steel web (100) before the adhesive solidifies; S3, hoisting the prefabricated profiled steel plate-concrete composite slab (2) to the upper row of fixed FRP plates (11), using temporary supports to tightly top the prefabricated profiled steel plate-concrete composite slab (2) and the corrugated steel web (100), smearing adhesive at the fixing head of the upper row of fixed FRP plates (11), pasting the upper row of fixed FRP plates (11) in the designed position in the corrugated groove of the corrugated steel web (100) before the adhesive solidifies, drilling bolt holes at the outer rib slabs (111), installing connecting steel plates (234), installing bolts penetrating the outer rib slabs (111), the connecting steel plates (234) and the I-shaped steel (231), and tightly screwing the bolts to connect the I-shaped steel (231) and the fixed FRP plates (11) together, and removing the temporary supports; S4, welding the protruding parts of the profiled steel plates (21) of adjacent prefabricated profiled steel plate-concrete composite slabs (2), erecting a formwork at the joint between the adjacent prefabricated profiled steel plate-concrete composite slabs (2), pouring UHPC, connecting the adjacent prefabricated profiled steel plate-concrete composite slabs (2) together, and completing the shear reinforcement of the corrugated steel web (100) composite beam.

Images