An assembled connecting structure of a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foam concrete wall body and a construction method thereof

Abstract

This invention discloses a prefabricated connection structure and construction method for a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foamed concrete wall. It includes: a PVC-FRP pipe reinforced concrete column, comprising PVC pipe, FRP strips, column stirrups, and column longitudinal reinforcement; a light steel keel steel mesh foamed concrete wall, comprising a light steel keel frame and a steel mesh; wall-side embedded connection components, including a vertical U-shaped connecting channel steel, an embedded connection box, an arc-shaped stiffening rib, and a wall-side arc-shaped connecting plate disposed outside the arc-shaped stiffening rib; and a column-side closed sleeve insertion assembly, comprising a closed-type round steel pipe sleeve connector and an open-box type column-side insertion connector. This prefabricated connection structure and construction method for a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foamed concrete wall can adapt to the outer contour of a round column, without damaging the PVC pipe and FRP strips, while simultaneously ensuring wall edge anchoring, insertion positioning, anti-slip properties, and reliable connection between the wall and the upper and lower beams.

Description

Technical Field

[0001] This invention relates to the field of building structure connection and seismic resistance technology, and more specifically to a prefabricated connection structure and construction method of a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foam concrete wall. Background Technology

[0002] Prefabricated structures offer advantages such as rapid construction speed, easy control of component quality, minimal on-site wet work, and short construction cycles, making them an important direction for the development of industrialized construction. Lightweight steel keel and steel mesh molded foamed concrete walls typically consist of a lightweight steel keel frame, steel mesh mold, and foamed concrete. They are characterized by their light weight, good thermal insulation performance, convenient construction, and ease of assembly, and can be used as lightweight infill walls in frame structures. PVC-FRP pipe reinforced concrete columns are a new type of composite column component formed by setting FRP strips on the outside of PVC pipes, placing a reinforcing cage inside the pipes, and then pouring concrete. They offer advantages such as good corrosion resistance and seismic performance. When the above lightweight walls are used in conjunction with PVC-FRP pipe reinforced concrete column frames, the connection methods between the walls and columns, and between the walls and beams, directly affect the cooperative load-bearing performance between the walls and the main structure.

[0003] The connection between existing frame infill walls and columns typically employs pre-embedded steel plates or nuts in conjunction with connecting bolts, tie bars, L-shaped angle steel, U-shaped clips, flat plate connectors, and lateral grooves. Wall panels near the column can also be bolted or welded together using wall edge studs, frame channel steel, or pre-embedded parts connecting the column to the column side. These connection methods are generally suitable for rectangular columns, shear walls, or other structures with straight boundaries, and the contact surface between the connector and the main structure is usually planar or polygonal. When used for circular PVC-FRP pipe reinforced concrete columns, ordinary flat plate connectors, L-shaped angle steel, or conventional channel connectors are difficult to fully conform to the outer contour of the circular column, easily leading to localized stress concentration. Directly drilling holes in the PVC pipe or FRP strip for connection may also weaken the external constraint system of the column.

[0004] Existing wall-to-beam or floor slab connections typically employ upper and lower U-shaped guide rails or C-shaped channel steel, L-shaped angle brackets, elongated hole adjusting connection plates, pre-embedded anchor bolts, self-drilling and self-tapping screws, inverted U-shaped connecting steel bars, and vertical grooves at the plate ends to achieve positioning, limiting, and connection between the top and bottom of the wall panel and the frame beam or floor slab. While these beam-wall connection methods can meet general installation and positioning requirements, for lightweight steel keel steel mesh molded foam concrete walls, due to the wall's light weight and limited local bonding capacity of the foam concrete, under seismic cyclic or out-of-plane forces, relying solely on local point connections or ordinary clamping for limiting can easily lead to problems such as loosening of connecting bolts, cracking of wall edges, local crushing of grooves, wall panel slippage, or separation of the wall and beam.

[0005] Therefore, how to provide a prefabricated connection structure and construction method for a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foam concrete wall that can adapt to the outer contour of a circular column, without damaging the PVC pipe and FRP strip, and at the same time take into account the wall edge anchoring, plug-in positioning, anti-slip, and reliable connection between the wall and the upper and lower beams is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides a prefabricated connection structure and construction method of PVC-FRP pipe reinforced concrete frame and light steel keel steel mesh foam concrete wall, which aims to solve one of the problems in the above-mentioned background technology, and can adapt to the outer contour of the circular column, without damaging the PVC pipe and FRP strip, while taking into account the wall edge anchoring, plug-in positioning, anti-slip, and reliable connection between the wall and the upper and lower beams.

[0007] To achieve the above objectives, in one respect, the present invention discloses a prefabricated connection structure between a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foam concrete wall, comprising: A PVC-FRP pipe reinforced concrete column includes a PVC pipe, FRP strips, column stirrups, and column longitudinal bars. Multiple FRP strips are arranged and wound circumferentially around the outer wall of the PVC pipe at intervals in the vertical direction. The column stirrups are arranged at the ends of the inner wall of the PVC pipe. Multiple column longitudinal bars are evenly distributed circumferentially on the inner wall of the PVC pipe. The PVC pipe is filled with concrete. Two PVC pipes are arranged at intervals. Frame beams are provided at the top and bottom of the two PVC pipes. A light steel keel steel mesh mold foam concrete wall includes a light steel keel frame and a steel mesh mold. The steel mesh mold is fixed on both sides of the light steel keel frame, and foam concrete is poured in the space enclosed by the steel mesh mold and the light steel keel frame. The wall-side pre-embedded connection assembly includes a vertical U-shaped connecting channel steel, multiple pre-embedded connection boxes welded vertically at intervals to one side of the U-shaped connecting channel steel, multiple arc-shaped stiffening ribs welded vertically at intervals to the other side of the U-shaped connecting channel steel, and a wall-side arc-shaped connecting plate disposed outside the arc-shaped stiffening ribs. The pre-embedded connection boxes extend into the space enclosed by the light steel keel frame and the steel mesh mold. Multiple steel strip through holes are opened vertically at intervals on the side wall of the vertical U-shaped connecting channel steel away from the pre-embedded connection boxes. The column-side closed sleeve coupling assembly includes a closed round steel pipe sleeve connector and an open box-type column-side coupling. The closed round steel pipe sleeve connector is sleeved on the outside of the PVC-FRP pipe reinforced concrete column. The open box-type column-side coupling is welded to the side wall of the closed round steel pipe sleeve connector. The open box-type column-side coupling is adapted to the wall-side arc connecting plate.

[0008] Furthermore, the pre-embedded connection box is provided with through bolt holes, and the light steel keel steel mesh mold foam concrete wall is provided with through tie bolts. The tie bolts pass through the through bolt holes and connect the pre-embedded connection box, the light steel keel frame, and the steel mesh mold into a whole. After the foam concrete is poured, it fills the interior of the pre-embedded connection box.

[0009] Furthermore, the arc-shaped stiffening rib divides the grouting cavity between the wall-side pre-embedded connection component and the column-side closed sleeve plug-in component into several grouting cavities. The grouting cavities are filled with grouting material, and the grouting material solidifies to form an integral connection between the wall and the column.

[0010] Furthermore, the vertical U-shaped connecting channel steel is provided with grouting holes and grouting discharge holes, both of which are connected to the grouting cavity; The grouting cavity includes at least the grouting cavity located in the upper connection area and the lower connection area of ​​the wall-column integral connection, and the upper connection area and the lower connection area are provided with the grouting hole and the grout discharge hole.

[0011] Furthermore, the arc-shaped contour of the wall-side arc-shaped connecting plate is adapted to the outer contour of the PVC-FRP pipe reinforced concrete column, and the wall-side arc-shaped connecting plate is provided with a plug hole for the insertion of the open box-type column-side plug-in.

[0012] Furthermore, the open-box column-side connector is configured as a box-shaped steel component with at least one side open, the interior of the open-box column-side connector is connected to the grouting cavity, and the grouting material forms a grouting tenon key inside the open-box column-side connector after solidification.

[0013] Furthermore, it also includes a prestressed steel strip, which passes through a steel strip through hole opened on the vertical U-shaped connecting channel steel and is arranged around the PVC-FRP pipe reinforced concrete column. The number of prestressed steel strips corresponds to the number of steel strip through holes on the vertical U-shaped connecting channel steel, the width of the prestressed steel strip is adapted to the net width of the steel strip through holes, and the thickness of the prestressed steel strip is adapted to the net thickness of the steel strip through holes.

[0014] Furthermore, it also includes a wall-beam connection assembly, including a T-shaped beam-wall integrated connector. The T-shaped beam-wall integrated connector is provided with a vertical T-shaped snap-fit ​​part, an upper beam connecting plate, and a lower beam connecting plate. The T-shaped snap-fit ​​part is used to snap the edge of the wall panel. The upper beam connecting plate and the lower beam connecting plate are used to connect the frame beams located at the upper and lower parts. Both the upper beam connecting plate and the lower beam connecting plate are provided with beam connecting bolt holes. The T-shaped beam-wall integrated connector is connected to the upper frame beam and the lower frame beam respectively by passing beam-wall connecting bolts through the bolt holes.

[0015] Furthermore, the light steel keel frame includes vertical keels, horizontal keels, and edge keels. The vertical keels are arranged along the height direction of the light steel keel steel mesh molded foam concrete wall, the horizontal keels are arranged along the width direction of the light steel keel steel mesh molded foam concrete wall, and the edge keels are arranged at the four edges of the light steel keel steel mesh molded foam concrete wall.

[0016] On the other hand, this invention discloses a construction method for a prefabricated connection structure of a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foamed concrete wall, used for installing the aforementioned prefabricated connection structure of a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foamed concrete wall, specifically including the following steps: S1: Construct a light steel keel frame and reserve an installation area for pre-embedded connection components on the wall edge; S2: Fabricate wall-side embedded connection components, weld embedded connection boxes on one side of the vertical U-shaped connecting channel steel, weld arc-shaped stiffening ribs and wall-side arc connecting plates on the other side, and open grouting holes, grout discharge holes and steel strip through holes on the vertical U-shaped connecting channel steel; S3: Set the wall-side pre-embedded connection components at the edge of the wall, so that the pre-embedded connection box extends into the light steel keel frame. The three are connected as a whole by passing through the through bolt holes on the steel mesh mold, the light steel keel frame and the pre-embedded connection box through the through bolts in the wall. S4: Pour foamed concrete to fill the internal space of the wall and enter the pre-embedded connection box. After hardening, it forms an integral wall. S5: The closed round steel pipe sleeve connector of the column-side closed sleeve plug-in assembly is pre-fitted onto the outside of the PVC-FRP pipe reinforced concrete column, and the open box-type column-side plug-in connector is welded onto it. S6: Insert the open box-type column-side connector into the insertion hole of the wall-side arc-shaped connecting plate to complete the insertion and positioning; S7: Pass the prestressed steel strip through the steel strip insertion hole and arrange it around the PVC-FRP pipe reinforced concrete column for tensioning and pre-tightening; S8: Inject grout into the grouting cavities of the upper and lower connecting areas through the grouting holes respectively, and stop grouting after the grout flows out from the discharge hole; S9: Install the wall beam connection assembly, place the vertical T-shaped snap-fit ​​part of the T-shaped beam wall integrated connector between adjacent wall panels or at the edge of the middle wall panel, and connect the upper beam connection plate and the lower beam connection plate to the upper frame beam and the lower frame beam respectively through beam wall connection bolts.

[0017] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a prefabricated connection structure and construction method of PVC-FRP pipe reinforced concrete frame and light steel keel steel mesh foam concrete wall, the beneficial effects of which are: 1) By setting the wall-side arc connecting plate to match the outer contour of the circular PVC-FRP pipe column, and combining it with arc-shaped stiffening ribs, the wall-side connecting components can smoothly fit the column surface, effectively avoiding point and line contact and local stress concentration caused by traditional flat plate connectors, and improving the stress state of the connection area. 2) Closed-type round steel pipe sleeve connectors are directly fitted onto the outside of the PVC-FRP pipe column, eliminating the need for drilling or welding on the PVC pipe or FRP strip. This fully preserves the circumferential restraint of the FRP strip and the corrosion resistance of the PVC pipe, ensuring the integrity and seismic bearing capacity of the column itself. 3) The insertion holes on the arc-shaped connecting plate on the wall side and the open box-type column side insertion parts form an insertion fit. During installation, the insertion parts only need to be pushed into the insertion holes to complete the rough positioning. There is no need for complicated measurement and adjustment, which greatly improves the efficiency of on-site assembly and is suitable for prefabrication and assembly construction. 4) The wall-side pre-embedded connection components, light steel keel, steel mesh mold, and foam concrete can be prefabricated in the factory as a whole; on site, only the prestressed steel strips need to be inserted, tensioned, grouted, and bolted to connect the wall beam connectors, which effectively reduces wet operations such as on-site formwork, reinforcement binding, and pouring, and is in line with the green and efficient development direction of prefabricated buildings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 A schematic diagram of the connection structure between the vertical U-shaped connecting channel steel and the pre-embedded connecting box provided by the present invention; Figure 2 This is a schematic diagram of the structure of the pre-embedded connection box provided by the present invention; Figure 3 A schematic diagram of the structure provided by the present invention showing the connection between the pre-embedded connecting box and the light steel keel steel mesh foam concrete wall through bolts. Figure 4 A schematic diagram of the structure provided by the present invention, showing the addition of arc-shaped stiffening ribs on the vertical U-shaped connecting channel steel; Figure 5 A schematic diagram of the structure of the arc-shaped connecting plate on the outer side of the vertical U-shaped connecting channel steel welded to the wall side provided by the present invention; Figure 6 A schematic diagram of the structure of the column-side closed sleeve plug-in assembly provided by the present invention; Figure 7 This is a structural schematic diagram of a PVC-FRP pipe reinforced concrete column provided by the present invention; Figure 8 A schematic diagram of the structure of the closed-type round steel pipe sleeve connector provided by the present invention after being sleeved on the outside of a PVC-FRP pipe reinforced concrete column; Figure 9 A schematic diagram showing the structure for preparing to connect the wall-side pre-embedded connection component and the column-side closed sleeve plug-in component provided by the present invention; Figure 10 This is a schematic diagram of the structure after the wall-side pre-embedded connection component and the column-side closed sleeve plug-in component provided by the present invention are connected; Figure 11 This is a structural schematic diagram of the T-shaped beam-wall integrated connector provided by the present invention; Figure 12 A structural schematic diagram of the integrated T-beam-wall connector provided by the present invention (from another perspective); Figure 13 This is an overall schematic diagram of the prefabricated connection structure of the PVC-FRP pipe reinforced concrete frame and the light steel keel steel mesh foam concrete wall provided by the present invention.

[0020] Wherein: 1 is a PVC-FRP pipe reinforced concrete column; 11 is a PVC pipe; 12 is an FRP strip; 13 is a column stirrup; 14 is a column longitudinal reinforcement; 15 is concrete; 2 is a light steel keel steel mesh mold foamed concrete wall; 21 is a light steel keel frame; 211 is a vertical keel; 212 is a horizontal keel; 213 is a frame keel; 22 is a steel mesh mold; 23 is foamed concrete; 24 is a through-bolt; 3 is a wall-side embedded connection component; 31 is a vertical U-shaped connecting channel steel; 32 is an embedded connection box; 33 is a through-bolt hole; 3 4 is an arc-shaped stiffening rib; 35 is a circular arc connecting plate on the wall side; 36 is a grouting hole; 37 is a grout discharge hole; 38 is a steel strip through hole; 4 is a closed sleeve plug-in assembly on the column side; 41 is a closed round steel pipe sleeve connector; 42 is an open box-type column side plug-in assembly; 5 is a prestressed steel strip; 6 is grouting material; 7 is a wall-beam connection assembly; 71 is a T-shaped beam-wall integrated connector; 711 is a vertical T-shaped snap-fit ​​part; 712 is an upper beam connection plate; 713 is a lower beam connection plate; 714 is a beam connection bolt hole; 715 is a beam-wall connection bolt; 8 is a frame beam. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] See Figure 1-13 This invention discloses a prefabricated connection structure and construction method of a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foam concrete wall, including: A PVC-FRP pipe reinforced concrete column 1 includes a PVC pipe 11, FRP strips 12, column stirrups 13, and column longitudinal bars 14. Multiple FRP strips 12 are arranged and are wound around the outer wall of the PVC pipe 11 at intervals in the vertical direction. The column stirrups 13 are arranged at the ends of the inner wall of the PVC pipe 11. Multiple column longitudinal bars 14 are evenly distributed on the inner wall of the PVC pipe 11. The PVC pipe 11 is filled with concrete 15. Two PVC pipes 11 are arranged at intervals. Frame beams 8 are provided at the top and bottom of the two PVC pipes 11. The light steel keel steel mesh molded foamed concrete wall 2 includes a light steel keel frame 21 and a steel mesh mold 22. The steel mesh mold 22 is fixed on both sides of the light steel keel frame 21. Foamed concrete 23 is poured into the space enclosed by the steel mesh mold 22 and the light steel keel frame 21. The steel mesh mold 22 is set as one or more of expanded steel mesh, perforated steel mesh, ribbed steel mesh or wire mesh. The steel mesh mold 22 is fixed to the light steel keel frame 21 by self-tapping screws, rivets, binding parts or welding, and serves as a template that can be removed during the pouring of foamed concrete. The wall-side embedded connection component 3 includes a vertical U-shaped connecting channel steel 31, multiple embedded connection boxes 32 welded vertically at intervals to one side of the U-shaped connecting channel steel 31, multiple arc-shaped stiffening ribs 34 welded vertically at intervals to the other side of the U-shaped connecting channel steel 31, and a wall-side arc-shaped connecting plate 35 disposed outside the arc-shaped stiffening ribs 34. The embedded connection boxes 32 extend into the space enclosed by the light steel keel frame 21 and the steel mesh mold 22. Multiple steel strip through holes 38 are opened vertically at intervals on the side wall of the vertical U-shaped connecting channel steel 31 away from the embedded connection boxes 32. The embedded connection boxes 32, arc-shaped stiffening ribs 34, and wall-side arc-shaped connecting plates 35 are all made of steel components. The embedded connection boxes 32 pass through the light steel keel. The through bolts of the skeleton 21 and the steel mesh mold 22 form an integral anchor to the light steel keel steel mesh mold foam concrete wall 2. The arc-shaped stiffening rib 34 divides the grouting cavity between the wall-side pre-embedded connection component 3 and the column-side closed sleeve plug-in component 4 into several grouting cavities. The grouting material 6 is filled into the grouting cavity. The pre-embedded connection box 32 is provided with an opening for the foam concrete 23 to flow in. After the foam concrete 23 is poured, it fills the interior of the pre-embedded connection box 32. The arc-shaped stiffening rib 34 divides the grouting cavity at the connection into several grouting cavities. In particular, the upper and lower key stress areas are provided with grouting holes 36 and grout discharge holes 37, which can be injected with grouting material 6 independently and fully, avoiding the sinking of grout or the accumulation of air bubbles during continuous grouting, which would cause local non-compactness. The number of embedded connection boxes 32 is determined based on the wall height, the design shear force to be transmitted in the wall-column connection area, and the design shear bearing capacity of a single embedded connection box 32. The number of embedded connection boxes 32, n, is... b Satisfy: n b V b ≥V α Among them, V b For the design shear capacity of a single embedded connection box 32, V α n represents the design shear force that needs to be transmitted in the wall-column connection area. b Take the integer value that is not less than the calculated value.

[0023] The pre-embedded connection box 32 is anchored to the wall as a whole by the through bolts that pass through the light steel keel frame 21 and the steel mesh mold 22. The arc-shaped stiffening rib 34 divides the grouting cavity between the wall-side pre-embedded connection component 3 and the column-side closed sleeve plug-in component 4 into several grouting cavities, and the grouting material 6 is filled into the grouting cavity. The column-side closed sleeve coupling assembly 4 includes a closed round steel pipe sleeve connector 41 and an open box-type column-side coupling 42. The closed round steel pipe sleeve connector 41 is sleeved on the outside of the PVC-FRP pipe reinforced concrete column 1, and the open box-type column-side coupling 42 is welded to the side wall of the closed round steel pipe sleeve connector 41. The open box-type column-side coupling 42 is inserted and adapted to the wall-side arc connecting plate 35. The open box-type column-side coupling 42 is set as a steel component and welded to the outer wall of the closed round steel pipe sleeve connector 41. By directly sleeved on the outside of the PVC-FRP pipe reinforced concrete column 1, the closed round steel pipe sleeve connector 41 is used, eliminating the need to drill holes or weld on the PVC pipe 11 or FRP strip 12. This fully preserves the circumferential restraint of the FRP strip 12 and the corrosion resistance of the PVC pipe, ensuring the integrity and seismic bearing capacity of the PVC-FRP pipe reinforced concrete column 1 itself.

[0024] In this embodiment, the pre-embedded connection box 32 is provided with through bolt holes 33, and the light steel keel steel mesh mold foam concrete wall 2 is provided with through tie bolts 24. The tie bolts 24 pass through the through bolt holes 33 and connect the pre-embedded connection box 32, the light steel keel frame 21, and the steel mesh mold 22 into a whole. When the foam concrete 23 is poured, it fills the space enclosed by the light steel keel frame 21 and the steel mesh mold 22, and partially passes through the gaps in the steel mesh mold 22. After hardening, it forms an integral wall with the light steel keel frame 21 and the steel mesh mold 22. The pre-embedded connection box 32 on the wall side is mechanically tied to the light steel keel frame 21 and the steel mesh mold 22 by through bolts, and the foam concrete 23 is filled into the interior of the pre-embedded connection box 32 after pouring, forming a composite anchoring system of "light steel keel frame 21, steel mesh mold 22, foam concrete 23 and pre-embedded connection box 32", which overcomes the problem of insufficient pull-out and shear resistance caused by the traditional connectors relying solely on lightweight foam concrete for bonding.

[0025] In this embodiment, the arc-shaped stiffening rib 34 divides the grouting cavity between the wall-side pre-embedded connection component 3 and the column-side closed sleeve insertion component 4 into several grouting cavities. The grouting cavities are filled with grouting material 6, and after the grouting material 6 solidifies, it forms an integral connection between the wall and the column.

[0026] In this embodiment, the vertical U-shaped connecting channel steel 31 is provided with grouting holes 36 and grout discharge holes 37, both of which are connected to the grouting cavity; The grouting cavity includes at least the grouting cavity located in the upper connection area and the lower connection area of ​​the wall-column integral connection. Both the upper connection area and the lower connection area are provided with grouting holes 36 and grout discharge holes 37.

[0027] In this embodiment, the arc-shaped contour of the wall-side arc connecting plate 35 is adapted to the outer contour of the PVC-FRP pipe reinforced concrete column 1. The wall-side arc connecting plate 35 is provided with a plug hole for the insertion of the open box-type column-side plug-in piece 42. The plug hole on the wall-side arc connecting plate 35 and the open box-type column-side plug-in piece 42 form a plug-in fit. During installation, it is only necessary to push the open box-type column-side plug-in piece 42 into the plug hole to complete the rough positioning. There is no need for complicated measurement and adjustment, which greatly improves the on-site assembly efficiency and is suitable for prefabrication and assembly construction.

[0028] In this embodiment, the open box-type column side connector 42 is configured as a box-shaped steel component with at least one side open. The interior of the open box-type column side connector 42 is connected to the grouting cavity. After the grouting material 6 solidifies, a grouting tenon is formed inside the open box-type column side connector 42.

[0029] In this embodiment, a prestressed steel strip 5 is also included. The prestressed steel strip 5 passes through the steel strip through hole 38 opened on the vertical U-shaped connecting channel steel 31 and is arranged around the PVC-FRP pipe reinforced concrete column 1. The number of prestressed steel strips 5 corresponds to the number of steel strip through holes 38 on the vertical U-shaped connecting channel steel 31, the width of the prestressed steel strip 5 is adapted to the net width of the steel strip through holes 38, and the thickness of the prestressed steel strip 5 is adapted to the net thickness of the steel strip through holes 38. The width, thickness, and quantity of the prestressed steel strip 5 are determined based on the required design tie force in the wall-column connection area; let the quantity of the prestressed steel strip 5 be n. s The width of a single prestressed steel strip 5 is b. s The thickness of a single prestressed steel strip 5 is t. s The allowable tensile stress of prestressed steel strip 5 is σ. sa If the required design tie force in the wall-column connection area is Nd, then the prestressed steel strip 5 satisfies: n s b s t s σ sa ≥N d Among them, the required design tie force N in the wall-column connection area d Determined based on the design shear force transmitted from the wall to the wall-column connection area, the anti-slip requirements of the connection area, and the prestressed steel strip tension control requirements; When the anti-slip condition is the control condition for the wall-column connection area, the required design tie force N for the wall-column connection area is... d Satisfy: N d ≥V d / μ Among them, V d The design shear force to be transmitted in the wall-column connection area is μ, which is the equivalent friction coefficient of the connection interface after the prestressed steel strip is tightened by 5 bundles.

[0030] In this embodiment, a wall-beam connection assembly 7 is also included, comprising a T-shaped beam-wall integrated connector 71. The T-shaped beam-wall integrated connector 71 is provided with a vertical T-shaped snap-fit ​​part 711, an upper beam connecting plate 712, and a lower beam connecting plate 713. The T-shaped snap-fit ​​part 711 is used to snap onto the edge of the wall panel. The upper beam connecting plate 712 and the lower beam connecting plate 713 are used to connect the frame beams 8 located at the upper and lower parts. Both the upper beam connecting plate 712 and the lower beam connecting plate 713 are provided with beam connection bolt holes 714. The T-shaped beam-wall integrated connector 71 is connected to the upper frame beam 8 and the lower frame beam 8 respectively by passing the beam-wall connecting bolts 715 through the bolt holes. The T-shaped beam-wall integrated connector 71 integrates three functions: wall panel clamping, upper frame beam 8 connection, and lower frame beam 8 connection. It not only restricts the in-plane offset and out-of-plane loosening of the middle wall panel or adjacent wall panel, but also reliably connects the middle part of the wall to the upper and lower beams, which significantly improves the integrity and overturning resistance of the infill wall under the action of lateral forces (wind, earthquake).

[0031] In this embodiment, the light steel keel frame includes vertical keels 211, horizontal keels 212, and edge keels 213. The vertical keels 211 are arranged along the height direction of the light steel keel steel mesh foam concrete wall 2, the horizontal keels 212 are arranged along the width direction of the light steel keel steel mesh foam concrete wall 2, and the edge keels 213 are arranged at the four edges of the light steel keel steel mesh foam concrete wall 2. The light steel keel frame 21 is formed by connecting cold-formed thin-walled steel components.

[0032] On the other hand, this invention discloses a construction method for a prefabricated connection structure of a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foam concrete wall, used for installing the above-mentioned prefabricated connection structure of a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foam concrete wall, specifically including the following steps: S1: Fabricate a light steel keel frame 21, and reserve an installation area for the wall-side pre-embedded connection component 3 at the edge of the light steel keel steel mesh foam concrete wall 2. S2: Fabricate the wall-side embedded connection component 3, weld the embedded connection box 32 on one side of the vertical U-shaped connecting channel steel 31, weld the arc-shaped stiffening rib 34 and the wall-side arc connecting plate 35 on the other side, and open the grouting hole 36, grout discharge hole 37 and steel strip through hole 38 on the vertical U-shaped connecting channel steel 31. S3: Set the wall-side pre-embedded connection component 3 at the edge of the light steel keel steel mesh mold foam concrete wall 2, so that the pre-embedded connection box 32 extends into the interior of the light steel keel frame 21, and the through-bolts on the light steel keel steel mesh mold foam concrete wall 2 pass through the through bolt holes 33 on the steel mesh mold 22, the light steel keel frame 21 and the pre-embedded connection box 32 to tie the three into a whole; S4: Pour foamed concrete 23 to fill the internal space of the light steel keel steel mesh foamed concrete wall 2 and enter the pre-embedded connection box 32. After hardening, it forms an integral wall. S5: The closed round steel pipe sleeve connector 41 of the column-side closed sleeve plug assembly 4 is pre-fitted onto the outside of the PVC-FRP pipe reinforced concrete column 1, and the open box-type column-side plug connector 42 is welded onto the closed round steel pipe sleeve connector 41. S6: Insert the open box-type column-side connector 42 into the insertion hole 35 of the wall-side arc connecting plate to complete the insertion and positioning. S7: Pass the prestressed steel strip 5 through the steel strip through hole 38 and arrange it around the PVC-FRP pipe reinforced concrete column 1 for tensioning and pre-tightening. S8: Inject grout 6 into the grouting cavities of the upper and lower connecting areas through the grouting hole 36 respectively, and stop grouting after the grout 6 flows out from the discharge hole 37; S9: Install the wall beam connection assembly 7, set the vertical T-shaped snap-fit ​​part 711 of the T-shaped beam wall integral connector 71 between adjacent wall panels or at the edge of the middle wall panel, and connect the upper beam connection plate 712 and the lower beam connection plate 713 to the upper frame beam 8 and the lower frame beam 8 respectively through the beam wall connection bolts 715.

[0033] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A kind of PVC-FRP pipe reinforced concrete frame and light steel keel steel mesh mould foam concrete wall body's assembly type connecting structure, it is characterized in that, include: A PVC-FRP pipe reinforced concrete column (1) includes a PVC pipe (11), FRP strips (12), column stirrups (13) and column longitudinal bars (14). Multiple FRP strips (12) are arranged and are wound around the outer wall of the PVC pipe (11) at intervals in the vertical direction. The column stirrups (13) are arranged at the ends of the inner wall of the PVC pipe (11). Multiple column longitudinal bars (14) are evenly distributed in a circle on the inner wall of the PVC pipe (11). The PVC pipe (11) is filled with concrete (15). Two PVC pipes (11) are arranged at intervals. Frame beams (8) are provided at the top and bottom of the two PVC pipes (11). The light steel keel steel mesh mold foam concrete wall (2) includes a light steel keel frame (21) and a steel mesh mold (22). The steel mesh mold (22) is fixed on both sides of the light steel keel frame (21). Foam concrete (23) is poured in the space enclosed by the steel mesh mold (22) and the light steel keel frame (21). The wall-side pre-embedded connection assembly (3) includes a vertical U-shaped connecting channel steel (31), a plurality of pre-embedded connection boxes (32) welded vertically at intervals to one side of the U-shaped connecting channel steel (31), a plurality of arc-shaped stiffening ribs (34) welded vertically at intervals to the other side of the U-shaped connecting channel steel (31), and a wall-side arc connecting plate (35) disposed outside the arc-shaped stiffening ribs (34). The pre-embedded connection boxes (32) extend into the space enclosed by the light steel keel frame (21) and the steel mesh mold (22). A plurality of steel strip through holes (38) are opened vertically at intervals on the side wall of the vertical U-shaped connecting channel steel (31) away from the pre-embedded connection boxes (32). The column-side closed sleeve plug-in assembly (4) includes a closed round steel pipe sleeve connector (41) and an open box-type column-side plug-in component (42). The closed round steel pipe sleeve connector (41) is sleeved on the outside of the PVC-FRP pipe reinforced concrete column (1). The open box-type column-side plug-in component (42) is welded to the side wall of the closed round steel pipe sleeve connector (41). The open box-type column-side plug-in component (42) is plugged into and adapted to the wall-side arc connecting plate (35).

2. The prefabricated connecting structure of PVC-FRP pipe reinforced concrete frame and light steel stud steel mesh form foam concrete wall according to claim 1, characterized in that, The pre-embedded connection box (32) is provided with through bolt holes (33), and the light steel keel steel mesh mold foam concrete wall (2) is provided with through tie bolts (24). The through tie bolts (24) pass through the through bolt holes (33) and connect the pre-embedded connection box (32), light steel keel frame (21), and steel mesh mold (22) into a whole. After the foam concrete (23) is poured, it fills the interior of the pre-embedded connection box (32).

3. The prefabricated connecting structure of PVC-FRP pipe reinforced concrete frame and light steel stud steel mesh form foam concrete wall according to claim 1, characterized in that, The arc-shaped stiffening rib (34) divides the grouting cavity between the wall-side pre-embedded connection component (3) and the column-side closed sleeve plug-in component (4) into several grouting cavities. The grouting cavity is filled with grouting material (6), and the grouting material (6) solidifies to form an integral connection between the wall and the column.

4. The prefabricated connecting structure of PVC-FRP pipe reinforced concrete frame and light steel stud steel mesh form foam concrete wall according to claim 3, characterized in that, The vertical U-shaped connecting channel steel (31) is provided with grouting holes (36) and grout discharge holes (37), and the grouting holes (36) and grout discharge holes (37) are both connected to the grouting cavity; The grouting cavity includes at least the grouting cavity located in the upper connection area and the lower connection area of ​​the wall column integral connection, and the upper connection area and the lower connection area are provided with the grouting hole (36) and the grout discharge hole (37).

5. The prefabricated connecting structure of PVC-FRP pipe reinforced concrete frame and light steel stud steel mesh form foam concrete wall according to claim 4, characterized in that, The arc-shaped contour of the wall-side arc connecting plate (35) is adapted to the outer contour of the PVC-FRP pipe reinforced concrete column (1), and the wall-side arc connecting plate (35) is provided with a plug hole for the open box-type column side plug-in (42) to be inserted.

6. The prefabricated connecting structure of PVC-FRP pipe reinforced concrete frame and light steel stud steel mesh form foam concrete wall according to claim 5, characterized in that, The open box-type column side connector (42) is configured as a box-shaped steel component with at least one side open. The interior of the open box-type column side connector (42) is connected to the grouting cavity. After the grouting material (6) solidifies, it forms a grouting tenon key inside the open box-type column side connector (42).

7. The prefabricated connection structure of a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foam concrete wall according to claim 1, characterized in that, It also includes a prestressed steel strip (5), which passes through a steel strip through hole (38) opened on the vertical U-shaped connecting channel steel (31) and is arranged around the PVC-FRP pipe reinforced concrete column (1). The number of prestressed steel strips (5) corresponds to the number of steel strip through holes (38) on the vertical U-shaped connecting channel steel (31), the width of the prestressed steel strip (5) is adapted to the net width of the steel strip through hole (38), and the thickness of the prestressed steel strip (5) is adapted to the net thickness of the steel strip through hole (38).

8. The prefabricated connection structure of a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foam concrete wall according to claim 1, characterized in that, It also includes a wall beam connection assembly (7), including a T-shaped beam-wall integrated connector (71). The T-shaped beam-wall integrated connector (71) is provided with a vertical T-shaped snap-fit ​​part (711), an upper beam connecting plate (712) and a lower beam connecting plate (713). The T-shaped snap-fit ​​part (711) is used to snap the edge of the wall panel. The upper beam connecting plate (712) and the lower beam connecting plate (713) are used to connect the frame beams (8) located at the upper and lower parts. The upper beam connecting plate (712) and the lower beam connecting plate (713) are both provided with beam connecting bolt holes (714). The T-shaped beam-wall integrated connector (71) is connected to the upper frame beam (8) and the lower frame beam (8) respectively by passing the beam-wall connecting bolts (715) through the bolt holes.

9. The prefabricated connection structure of a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foam concrete wall according to claim 1, characterized in that, The light steel keel frame includes vertical keels (211), horizontal keels (212), and edge keels (213). The vertical keels (211) are set along the height direction of the light steel keel steel mesh foam concrete wall (2), the horizontal keels (212) are set along the width direction of the light steel keel steel mesh foam concrete wall (2), and the edge keels (213) are set at the four edges of the light steel keel steel mesh foam concrete wall (2).

10. A construction method for a prefabricated connection structure of a PVC-FRP pipe reinforced concrete frame and a light steel keel steel mesh foamed concrete wall, as described in any one of claims 1-9, characterized in that... Specifically, the following steps are included: S1: Construct a light steel keel frame and reserve an installation area for pre-embedded connection components on the wall edge; S2: Fabricate wall-side embedded connection components, weld embedded connection boxes on one side of the vertical U-shaped connecting channel steel, weld arc-shaped stiffening ribs and wall-side arc connecting plates on the other side, and open grouting holes, grout discharge holes and steel strip through holes on the vertical U-shaped connecting channel steel; S3: Set the wall-side pre-embedded connection components at the edge of the wall, so that the pre-embedded connection box extends into the light steel keel frame. The three are connected as a whole by passing through the through bolt holes on the steel mesh mold, the light steel keel frame and the pre-embedded connection box through the through bolts in the wall. S4: Pour foamed concrete to fill the internal space of the wall and enter the pre-embedded connection box. After hardening, it forms an integral wall. S5: The closed round steel pipe sleeve connector of the column-side closed sleeve plug-in assembly is pre-fitted onto the outside of the PVC-FRP pipe reinforced concrete column, and the open box-type column-side plug-in connector is welded onto it. S6: Insert the open box-type column-side connector into the insertion hole of the wall-side arc-shaped connecting plate to complete the insertion and positioning; S7: Pass the prestressed steel strip through the steel strip insertion hole and arrange it around the PVC-FRP pipe reinforced concrete column for tensioning and pre-tightening; S8: Inject grout into the grouting cavities of the upper and lower connecting areas through the grouting holes respectively, and stop grouting after the grout flows out from the discharge hole; S9: Install the wall beam connection assembly, place the vertical T-shaped snap-fit ​​part of the T-shaped beam wall integrated connector between adjacent wall panels or at the edge of the middle wall panel, and connect the upper beam connection plate and the lower beam connection plate to the upper frame beam and the lower frame beam respectively through beam wall connection bolts.

Images