Horizontal connecting structure of full-fabricated light ribbed wallboard with energy consumption function

Abstract

The invention relates to the technical field of building wall structures, in particular to a horizontal connecting structure of a full-assembly type light ribbed wallboard with an energy dissipation effect, which comprises a ribbed wallboard, a connecting column, an internal embedded part (a first L-shaped threaded sleeve, a T-shaped threaded sleeve and an SMA rib) and an external connecting part (a bolt, a gasket and a second L-shaped threaded sleeve). The T-shaped sleeve is pre-embedded in a wallboard, and upper and lower screw holes are flush with the beam end; the first L-shaped sleeve is pre-embedded in the connecting column, and the outer surface is flush with the first L-shaped sleeve. The SMA rib is a nickel-titanium alloy rod, the diameter of the SMA rib is 10-20 mm, threads at the two ends of the SMA rib are thickened, the SMA rib is arranged on the column top or the column foot, and the threaded end extends out of the column side and is detachably connected with an external second L-shaped sleeve. The T-shaped sleeve and the L-shaped sleeve are connected through bolts, and full-dry type horizontal splicing of the wall plate and the column is achieved. The gasket is used for dispersing pressure and protecting the surface. Limitation of ribbed beams is broken through, the energy dissipation anti-seismic function and the self-resetting function are achieved, assembling and disassembling are completed only by screwing or unscrewing bolts on site, and construction is efficient and convenient.

Description

Technical Field

[0001] This invention belongs to the field of building wall structure technology, specifically relating to a horizontal connection structure of a fully prefabricated lightweight ribbed wall panel with energy dissipation function. Background Technology

[0002] Lightweight ribbed wall panels consist of thin-walled panels and internal ribs, making them 30%-40% lighter than traditional wall panels. They offer excellent thermal insulation and seismic performance. However, their unique rib distribution structure makes existing connection technologies difficult to apply effectively. Existing precast wall panel connection technologies mainly include: 1. Reinforcement lap splicing with post-cast strip connection: This extends the construction period, has a low material recycling rate, and the concentrated reinforcement at the ribs makes post-cast strip construction difficult; 2. Embedded part welding connection: This results in large welding deformation, difficulty in matching embedded parts with the ribs, and reduced connection strength; 3. Steel plate bolt connection: The rib position limits the connection point placement, requiring excessive reinforcement components; 4. Tongue and groove connection: The thin-walled structure results in insufficient mortise and groove strength, significantly reducing shear resistance. The main problems in practical applications include: connection point layout restricted by the ribs; incompatibility between connecting components and the lightweight structure; low assembly efficiency; and the inability to achieve completely dry connections and recycling. For example, patent CN111764534B proposes a dry connection device for vertical joints of prefabricated composite walls, mainly composed of pre-embedded connecting sleeves, connecting boxes, and high-strength bolts. This device enables rapid dry splicing on one side, with no wet work throughout the process, offering advantages such as high construction efficiency and easy repair of concentrated vibration damage. However, the pre-embedded connecting boxes require a large space, which may interfere with the arrangement of structural reinforcement, and the nodes are rigid and lack energy dissipation capabilities. Patent CN112593644B proposes a precast shear wall vertical joint connection structure. It features opposing connecting grooves at the top of the left and right wall panels, embedding I-shaped steel plates and precast steel mesh within the grooves, and then forming the structure with cast-in-place concrete in one go. A sealing plate and tie bolts are also provided in the thickness direction to form a cast-in-place groove, completing the vertical joint connection after overall casting. On-site fabrication eliminates the need for steel reinforcement tying and formwork, simplifying the process. However, during on-site construction, it is necessary to wait for the post-poured concrete to cure, which is still a wet connection. Furthermore, the post-poured concrete cannot be disassembled without damage after curing, resulting in low recycling rate. In addition, there are no energy-consuming components, and the lateral stiffness is prone to sudden change, making it susceptible to brittle failure under strong earthquakes.

[0003] As prefabricated buildings develop towards "fully prefabricated, zero-wet construction, and recyclable," the market urgently needs a fully prefabricated horizontal connection structure specifically designed for lightweight ribbed wall panels. This invention solves the technical challenges of connecting lightweight ribbed wall panels by using an innovative T-shaped and L-shaped threaded sleeve pre-embedded system in conjunction with various types of connecting columns, achieving the technical goals of reliable connection, efficient assembly, and complete detachability. Summary of the Invention

[0004] The purpose of this invention is to provide a fully prefabricated horizontal connection structure suitable for lightweight ribbed wall panels. It adopts a fully dry bolt connection method, and the assembly and disassembly are completed on site by tightening or loosening the bolts. No post-concrete pouring is required, thereby improving assembly efficiency and reusability, and achieving energy dissipation and self-resetting under seismic action.

[0005] The technical solution of the present invention is as follows: The connection structure includes a ribbed wall plate, a connecting column, internal embedded parts, and external connectors; the ribbed beam portion of the ribbed wall plate extends to form a beam connection end, and the connecting column has protrusions at certain positions to form a column connection end; the internal embedded parts include a first L-shaped threaded sleeve, a T-shaped threaded sleeve, and an SMA rib, wherein the SMA rib is a rod-shaped shape memory alloy mainly composed of nickel-titanium alloy, with a diameter of 10–20 mm, and both ends are threaded with the threaded end diameter being 1.2–1.5 times the diameter of the middle non-threaded section, used for energy dissipation and self-resetting; the T-shaped threaded sleeve is embedded in the ribbed wall plate and its upper and lower threaded holes are flush with and vertical to the upper and lower surfaces of the beam connection end, and the first L-shaped threaded sleeve is embedded in the connecting column and... The outer surface of the connection end with the column is flush with and vertical; the SMA reinforcement is set at the top and / or base of the connecting column, with its two threaded ends fully extending from both sides of the connecting column, and one end connected to the first L-shaped threaded sleeve; the external connectors include bolts, washers, and the second L-shaped threaded sleeve, which is connected to the threaded end of the extended SMA reinforcement on site, and the T-shaped threaded sleeve is connected to the first L-shaped threaded sleeve and / or the second L-shaped threaded sleeve by bolts to achieve horizontal splicing of the ribbed wall panel and the connecting column; the washers are placed at the contact point between the bolts or the second L-shaped threaded sleeve and the concrete surface to distribute pressure and protect the surface; the splicing between different ribbed wall panels is achieved by the connecting column set at the connection point.

[0006] Preferably, the ribbed wall panel and the connecting column extend outwards by the same length, and the lengths of the beam connection end and the column connection end are both half the thickness of the ribbed wall panel.

[0007] Preferably, the longitudinal reinforcement bars of the rib beam are threaded at both ends and connected to T-shaped threaded sleeves to fix the T-shaped threaded sleeves to the steel reinforcement skeleton of the ribbed wall plate.

[0008] Preferably, the two threaded ends of the SMA rib extend fully beyond the two sides of the connecting column so that it can be detachably connected to the external second L-shaped threaded sleeve on site.

[0009] Preferably, the end face of the first L-shaped threaded sleeve is flush with the outer surface of the column connection end and remains vertical, and the center of its threaded hole is located at the midpoint of the length of the column connection end; the upper and lower threaded holes of the T-shaped threaded sleeve are flush with the upper and lower surfaces of the beam connection end and remain vertical, and the center of its threaded hole is located at the midpoint of the length of the beam connection end.

[0010] The beneficial effects of this invention are as follows: 1) The T-shaped and L-shaped threaded sleeve pre-embedded system is matched with the position and height of the rib beam of the lightweight ribbed wall panel. The SMA reinforcement in the connecting column realizes a reliable connection with the adjacent wall panel, which alleviates the restriction of the connection position by the rib beam and improves the shear resistance of the connection; 2) Based on the superelasticity and shape memory characteristics of nickel-titanium alloy, the SMA reinforcement dissipates energy under earthquake action and self-resets after the earthquake, which significantly improves the seismic toughness; 3) The fully dry and detachable connection is adopted. The construction process does not involve post-poured concrete, which is convenient for assembly and recycling. Attached Figure Description

[0011] Figure 1 A three-dimensional schematic diagram of a horizontal connection structure for a fully prefabricated lightweight ribbed wall panel with energy-dissipating function;

[0012] Figure 2 Figure 1 Detailed magnification of the local area Figure 1-1 ;

[0013] Figure 3 Figure 1 Detailed magnification of the local area Figure 2-2 ;

[0014] Figure 4 A schematic diagram showing the location of internal embedded parts in a horizontal connection structure;

[0015] Figure 5 for Figure 4 The enlarged detailed view shows the location of each internal embedded part in detail;

[0016] Figure 6 for Figure 4 The AA section view shows the structure of the connecting column along the AA section plane;

[0017] Figure 7 A three-dimensional schematic diagram of the internal embedded parts and external connectors in a horizontal connection structure;

[0018] The codes in the attached diagram are: 1-ribbed wall panel; 11-ribbed beam; 12-beam connection end; 13-ribbed beam longitudinal reinforcement; 2-connecting column; 21-column connection end; 3-internal embedded part; 31-first L-shaped threaded sleeve; 32-T-shaped threaded sleeve; 33-SMA reinforcement; 4-external connector; 41-bolt; 42-washer; 43-second L-shaped threaded sleeve; Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 3 As shown, the present invention discloses a horizontal connection structure of a fully prefabricated lightweight ribbed wall panel with energy dissipation function. The main structure includes a ribbed wall panel 1 and a connecting column 2.

[0021] Specifically, the ribbed wall panel 1 and the connecting column 2 have the same thickness. The ribs 11 of the ribbed wall panel 1 extend out and serve as beam connection ends 12. The connecting column 2 has protrusions at certain positions and serves as column connection ends 21.

[0022] Specifically, the lengths of the outwardly extending portions of the ribbed wall panel 1 and the connecting column 2 are equal, that is, the length of the beam connection end 12 is equal to the length of the column connection end 21.

[0023] Specifically, the height of the column connection end 21 is equal to the net distance between the two adjacent beam connection ends 12 to be connected;

[0024] like Figures 4 to 7 As shown, the internal embedded parts include a first L-shaped threaded sleeve 31, a T-shaped threaded sleeve 32, and an SMA rib 33; the external connecting parts include a bolt 41, a washer 42, and a second L-shaped threaded sleeve 43.

[0025] Specifically, the materials of the first L-shaped threaded sleeve 31, the T-shaped threaded sleeve 32, the bolt 41, the washer 42, and the second L-shaped threaded sleeve 43 are all Q235 steel. The diameter of the threaded hole of the first L-shaped threaded sleeve 31, the T-shaped threaded sleeve 32, and the second L-shaped threaded sleeve 43 is determined according to the cross-sectional dimensions of the components to be connected.

[0026] Specifically, the T-shaped threaded sleeve 32 is pre-embedded in the ribbed wall panel 1 by connecting with the threaded end of the longitudinal reinforcement 13 of the ribbed wall panel 1.

[0027] Specifically, the upper and lower threaded holes of the T-shaped threaded sleeve 32 are flush with the upper and lower surfaces of the beam connection end 12 and remain vertical, with the center of the threaded hole being the midpoint of the length of the beam connection end 12.

[0028] Specifically, SMA 33 is a rod-shaped shape memory alloy mainly composed of nickel-titanium alloy, with threads at both ends, a diameter of 10–20 mm, and has good shape memory effect and superelasticity, used for energy dissipation and self-resetting.

[0029] Specifically, the diameter of the threaded end section of the SMA rib 33 is 1.2–1.5 times the diameter of the unthreaded section in the middle, so that when deformation occurs and energy is consumed, the middle section will deform first and the connection between the two ends will be stable.

[0030] Specifically, the SMA reinforcement 33 is tied and fixed to the steel reinforcement skeleton inside the connecting column 2; the two threaded ends of the SMA reinforcement 33, which are pre-installed at the top and / or bottom of the connecting column 2, must extend out of both sides of the connecting column 2. The end face of the end that is connected to the first L-shaped threaded sleeve 31 is flush with the outer surface of the column connecting end 21 and remains vertical, and the center of the threaded hole is located at the midpoint of the length of the column connecting end 21.

[0031] Specifically, the length and cross-sectional dimensions of the SMA ribs 33 at different positions in the connecting column 2 are the same. The surface of the screw hole of the first L-shaped threaded sleeve 31 connected to both ends of the SMA rib 33 is flush with the surface of the column connecting end 21 and remains vertical. The center position of its screw hole is half the length of the column connecting end 21.

[0032] Specifically, when the ribbed wall panel 1 and the connecting column 2 are hoisted to the construction site for assembly, the screw hole of the T-shaped threaded sleeve 32 pre-embedded in the ribbed wall panel 1 is aligned with the screw hole of the first L-shaped threaded sleeve 31 pre-embedded in the connecting column 2 so that the connection can be achieved by bolts 41.

[0033] Specifically, the second L-shaped threaded sleeve 43 needs to be detachably connected on-site to the threaded end of the SMA rib 33 extending from the connecting column 2 after the prefabricated ribbed wall panel 1 and connecting column 2 are hoisted to the designated position.

[0034] Specifically, bolt 41 is used to connect T-shaped threaded sleeve 32 with first L-shaped threaded sleeve 31 and T-shaped threaded sleeve 32 with second L-shaped threaded sleeve 43, thereby realizing the horizontal splicing between ribbed wall panel 1 and connecting column 2.

[0035] In this invention, adjacent ribbed wall panels 1 are horizontally spliced ​​together by connecting columns 2. Shims 42 are placed at the contact points between the bolt head 41 or the second L-shaped threaded sleeve 43 and the concrete surface, serving to distribute pressure and protect the surface. Before pouring concrete between the ribbed wall panel 1 and the connecting column 2, protective sleeves are inserted into the threaded holes of the T-shaped threaded sleeve 32 and the first L-shaped threaded sleeve 31, and positioning devices such as plastic clips are used to fix the first L-shaped threaded sleeve 31, the T-shaped threaded sleeve 32, and the SMA reinforcement 33 in their designed positions.

[0036] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of this invention.

Claims

1. A horizontal connection structure for a fully prefabricated lightweight ribbed wall panel with energy-dissipating function, comprising ribbed wall panels, connecting columns, internal embedded parts, and external connectors; wherein: The ribbed beams with ribbed wall panels (partially extending to form beam connection ends, and connecting columns with protrusions at certain locations to form column connection ends); the internal embedded parts include a first L-shaped threaded sleeve, a T-shaped threaded sleeve, and SMA ribs. The SMA ribs are rod-shaped shape memory alloys mainly composed of nickel-titanium alloy, with a diameter of 10–20 mm, possessing good shape memory effect and superelasticity, and having threads at both ends. The diameter of each threaded end is 1.2–1.5 times the diameter of the unthreaded section in the middle, used for energy dissipation and self-resetting; the T-shaped threaded sleeves are embedded in the ribbed wall panels, with their through-holes flush with the upper and lower surfaces of the beam connection ends and kept vertical, and the center of the threaded holes located at the midpoint of the beam connection end length; the first L-shaped threaded sleeves are embedded in the connecting columns, with their end faces flush with the outer surface of the column connection end and kept vertical, and the threaded holes are located at the midpoint of the beam connection end length; The core is located at the midpoint of the column connection length. The SMA reinforcement is set at the top and / or base of the connecting column, with both threaded ends fully extending beyond the two sides of the connecting column. The external connectors include bolts, washers, and a second L-shaped threaded sleeve. The second L-shaped threaded sleeve is connected to the threaded end of the extended SMA reinforcement at the wall panel installation site. The bolts are used to detachably connect the T-shaped threaded sleeve to the first L-shaped threaded sleeve and / or the second L-shaped threaded sleeve, thereby achieving horizontal splicing between the ribbed wall panel and the connecting column. The washers are set at the position where the bolt head or the second L-shaped threaded sleeve contacts the concrete surface to distribute pressure and protect the surface. The splicing between different ribbed wall panels is achieved through the connecting column set at the connection point, and assembly and disassembly are completed on-site by tightening or loosening the bolts, without the need for post-poured concrete.

2. The connection structure according to claim 1, characterized in that, The ribbed wall panel and the connecting column extend outwards by the same length, and the lengths of the beam connection end and the column connection end are both half the thickness of the ribbed wall panel.

3. The connection structure according to claim 1, characterized in that, The height of the column connection end is equal to the net distance between the connection ends of the two adjacent beams to be connected.

4. The connection structure according to claim 1, characterized in that, The longitudinal reinforcement bars of the ribbed wall panel have threads at both ends, and the T-shaped threaded sleeve is fixed to the steel reinforcement skeleton of the ribbed wall panel by connecting with the threaded ends of the longitudinal reinforcement bars of the ribbed wall panel.

5. The connection structure according to claim 1, characterized in that, After the precast components are hoisted into place, the second L-shaped threaded sleeve is detachably connected to the threaded end of the SMA reinforcement extending from the connecting column on site, and is connected to the T-shaped threaded sleeve by bolts to form a force transmission path.

6. The connection structure according to claim 1, characterized in that, The first L-shaped threaded sleeve, the T-shaped threaded sleeve, the second L-shaped threaded sleeve, the bolt, and the washer are made of Q235 steel.

7. The connection structure according to claim 1, characterized in that, Before pouring concrete for the ribbed wall panel and connecting column, insert protective sleeves into the screw holes of the T-shaped threaded sleeve and the first L-shaped threaded sleeve, and set up positioning devices such as plastic clips to fix the first L-shaped threaded sleeve, T-shaped threaded sleeve and SMA reinforcement in the designed position.

8. The connection structure according to claim 1, characterized in that, The gasket is placed between the bolt head and the surface of the exposed component and / or between the second L-shaped threaded sleeve and the surface of the exposed component.

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