An externally extended and anchored segmented post-tensioned precast self-centering wall system

Abstract

The present invention relates to an externally extended and anchored segmented post-tensioned prefabricated self-centering wall system, which is composed of wall combinations spliced successively from bottom to top on a foundation (1). The system includes standard floors (2) and connection floors (8). Taking several standard floors (2) and one section of connection floor (8) as a group, within each group, the standard floors (2) and the connection floor (8) are spliced through post-tensioned prestressing tendons. Externally extended tensioning ends, namely protruding wedge-shaped bumps (9), are symmetrically arranged on both sides of the wall at the lower part of the connection floor (8), and anchoring ends (4) are arranged on the upper surface. Prestressing tendon ducts (3) are reserved inside both the standard floors (2) and the connection floors (8), and space is provided for the anchoring ends (4) of the upper prestressing tendons and the upper prestressing tendon ducts (3) through the curved lower prestressing tendon ducts (3). Compared with the prior art, the present invention has the advantages of controllable segmented prestress, low structural damage after earthquake, small residual displacement, and full prefabrication construction.

Description

Technical Field

[0001] The present invention belongs to the technical field of civil engineering and relates to an outrigger-anchored segmented post-tensioned precast self-centering wall system. Background Art

[0002] In recent years, the development of earthquake engineering research in China has shown a trend from earthquake resistance and seismic isolation to recoverable functionality. Earthquake recoverable functionality can be defined as the ability of a structure, system, or city to recover after being disturbed by earthquake ground motion input. For engineering structures, earthquake recoverable functionality structures not only require the structure to protect lives under earthquake action, but also require the structure to quickly recover after the earthquake and reduce the impact on normal use.

[0003] Among the existing research on earthquake recoverable functionality structures, the self-centering wall is a relatively typical structural system. Self-centering walls are usually precast in segments along the height, and the segmented precast wall panels are spliced vertically into a whole through unbonded post-tensioned prestressing tendons. The distribution steel bars in the wall panels are discontinuous at the joints. The prestressing tendons serve as devices for the structure or component to return to the initial position, thereby reducing the post-earthquake residual deformation of the structure or component.

[0004] The existing prestressing tendons of self-centering walls usually adopt a full-length arrangement and are directly tensioned from the top of the wall to the foundation part. However, for high-rise buildings, if the same arrangement form is adopted, the prestressing tendons will be too long, resulting in difficulties in one-time tensioning and construction. At the same time, due to the prestress loss problem, it is very difficult for the prestressing tendons to reach the required prestress strength. Moreover, for the walls on different floors, the required prestress magnitudes are also inconsistent. If the same strength is adopted, there will be a certain degree of resource waste.

[0005] Patent CN206053037U discloses a segmented prestressed self-centering damage-concentrated precast rocking shear wall, which includes a plurality of walls with damage-concentrated blocks at the corners arranged from bottom to top. Each wall is provided with unbonded prestressing tendons with one end anchored in the wall and the other end extending above the wall. Each wall is also provided with reserved prestressing tendon ducts, and anchors are provided at the upper ends of each reserved prestressing tendon duct. Among adjacent walls, the reserved prestressing tendon ducts in the upper wall correspond to the unbonded prestressing tendons arranged in the lower wall. After the unbonded prestressing tendons penetrate into the corresponding reserved prestressing tendon ducts, their upper ends are anchored by the anchors. However, this patent fails to fully consider the post-earthquake recoverability of the structure, and it is impossible to repair and re-tension the internal prestressing tendons after the earthquake. Moreover, since all its anchors are arranged inside the structure, it is inconvenient for on-site tensioning.

[0006] Patent CN212715656U discloses a prefabricated prestressed structure with curved reinforcement. The prefabricated prestressed structure includes a prestressed main frame beam, prestressed secondary frame beams, and prestressed secondary beams. The prestressed main frame beam and the prestressed secondary frame beams are arranged vertically and horizontally in a cross pattern. The prestressed secondary beams are parallel to the prestressed secondary frame beams and perpendicular to the prestressed main frame beam. Curved prestressing tendons are arranged in the prestressed main frame beam, the prestressed secondary frame beams, and the prestressed secondary beams. The prestressing tendons are arranged in single-span segments, serving as top reinforcement at the supports of the beams and as bottom reinforcement at the mid-spans. The prestressing tendons of each span extend into adjacent beams and are anchored. However, the arrangement form of the prestressing tendons in this patent is not applicable to vertical load-bearing members such as columns and walls, which does not conform to their force characteristics, and its segmented tensioning method is difficult to implement in vertical structures.

[0007] Patent CN109594652A discloses a prestressed assembled frame structure tensioned and anchored to a column corbel. The horizontal connection between the frame beam and the frame column is achieved through the frame column corbel in the middle of the frame column, and the vertical connection between the frame columns is achieved through the column end corbels at the ends of the frame columns; it is applicable to a more simplified and superior connection structure between beams and columns, columns and columns. Among them, the beam and the column are connected by the corbels protruding around the middle of the column, and prestressing tendons are tensioned and anchored on the corbels to achieve mutual connection; the columns are connected near the middle of the floor height, and corbels protrude around the upper and lower ends, and diagonal prestressed connecting steel bars are tensioned and anchored on the corbels. However, the arrangement form of this patent is not applicable to members with a small cross-sectional width such as walls, and problems such as steel bar collision are likely to occur. Summary of the Invention

[0008] The purpose of the present invention is to overcome the defects of the above-mentioned existing technologies and provide an externally extended anchored segmented post-tensioned prefabricated self-centering wall system with reasonable force, easy repair after earthquake, and convenient construction. The prestress of the present invention is post-tensioned in segments and adopts an externally extended anchoring method, which can achieve different post-tensioned prestresses along the height of the wall.

[0009] The purpose of the present invention can be achieved through the following technical solutions:

[0010] The present invention provides an externally extended anchored segmented post-tensioned prefabricated self-centering wall system, which is composed of wall combinations spliced sequentially from bottom to top from the foundation. The system includes standard floors and connection floors that are all prefabricated and assembled. Taking several standard floors and one connection floor as a group, the standard floors and the connection floor are spliced within each group through post-tensioned prestressing tendons;

[0011] On both sides of the wall at the lower part of the connection floor, externally extended tensioning ends are symmetrically arranged. The externally extended tensioning ends are protruding wedge-shaped convex blocks, and an anchoring end is arranged on the upper surface of the wedge-shaped convex block. The number of externally extended tensioning ends is determined according to the number of prestressing tendons in the specific wall.

[0012] Both the standard floor and the connection floor are reserved with prestressed tendon ducts inside. Among them, the form of the prestressed tendon duct in the standard floor is a straight line arranged vertically through the whole length, and the layout in the duct plane adopts a double-axisymmetric form; the line type of the lower prestressed tendon duct in the connection floor is an arc, and the lower prestressed tendon extends from the bottom of the connection floor to the two-sided extended tension ends on both sides and is anchored at the anchorage end; the form of the upper prestressed tendon duct in the connection floor is a straight line arranged vertically, and the upper prestressed tendon is anchored inside the connection floor. The curved lower prestressed tendon duct provides space for the anchorage end of the upper prestressed tendon and the upper prestressed tendon duct to prevent steel bar collision.

[0013] Furthermore, spiral stirrups are arranged near the top of the prestressed tendon duct of the wedge-shaped convex block to enhance the local stress requirements of the anchorage end.

[0014] Furthermore, a joint that sways and lifts is provided at the connection between the standard floor and the connection floor.

[0015] Furthermore, joint mortar is provided for the joint that sways and lifts, and energy-dissipating steel bars are arranged in the middle of the upper and lower walls of the joint that sways and lifts.

[0016] Furthermore, a joint with a non-sway interface is provided at the connection between the standard floor and the connection floor.

[0017] Furthermore, connecting steel bars are arranged at both ends of the joint with a non-sway interface to prevent the floor joint from lifting, and a corner restraint zone is arranged at the corner of the upper wall of the joint with a non-sway interface, and closely spaced stirrups are arranged.

[0018] Furthermore, a joint is provided at the connection between the wall and the foundation. Joint mortar is provided for this joint, energy-dissipating steel bars are arranged in the middle of the upper and lower walls of the joint, and a corner restraint zone is arranged at the corner of the upper wall of the joint, and closely spaced stirrups are arranged.

[0019] Furthermore, the thickness of the joint mortar is 10 - 30 mm.

[0020] Furthermore, a joint with a non-sway interface is provided at the connection between the standard floors, and connecting steel bars are arranged at both ends of the joint with a non-sway interface to prevent the floor joint from lifting.

[0021] Furthermore, the prestressed tendon ducts in a group of wall combinations are aligned vertically. After hoisting, prestressed tendons are threaded through the prestressed tendon ducts. The tensioning section of the prestressed tendon is the extended tension end at the connection floor of the highest layer inside the combination, and the anchorage section is set at the bottom position of the connection floor in the previous combination. Among them, for the first combination, the anchorage section is set inside the foundation; for the top combination, no additional connection floor is added, and the tensioning section is directly arranged at the top of the highest standard floor.

[0022] The swinging wall body forms multiple swinging nodes from bottom to top. During the swinging process of the wall, deformation is concentrated through the swinging nodes, reducing the plastic deformation of the wall, effectively reducing the internal force of the wall, and avoiding the premature yield of the longitudinal reinforcement in the middle of the wall due to excessive internal force, which may cause the wall to fail.

[0023] The main purposes of arranging the wedge-shaped protrusions in the present invention are as follows:

[0024] (1) Facilitate the repair and re-tensioning operations of the prestressed tendons in the damaged wall during the post-earthquake repair stage;

[0025] (2) Increase the cross-sectional area at the same horizontal height, reduce the possibility of collision between the upper and lower prestressed tendon ducts and the anchorage ends, and can be applied to walls with a smaller width;

[0026] (3) Facilitate on-site construction operations and improve project efficiency;

[0027] (4) The arrangement of the wedge-shaped protrusions conforms to the curved arrangement of the prestressed tendon ducts. Under the condition of retaining sufficient duct space, materials are saved as much as possible to achieve the maximum economic benefit; at the same time, it also conforms to the vertical force characteristics of the wall, and realizes functions such as post-earthquake repair, segmented tensioning, and prestressed tendon lapping under the condition of ensuring structural stability.

[0028] Meanwhile, the present invention also provides a construction method for an extended anchorage type segmented post-tensioned precast self-centering wall system, and the construction method includes the following steps:

[0029] (1) In the factory, precast the wall body by dividing it into standard layers and connection layers respectively, and reserve prestressed tendon ducts and energy-dissipating steel bar ducts;

[0030] (2) At the construction site, arrange the precast wall bodies in groups of three from bottom to top on the foundation to ensure that the ducts are aligned;

[0031] (3) Set the prestressed tendon anchorage section of the first group at the lower part of the foundation, pass the prestressed tendons through the preset tensioning section of the connection layer, and complete the tensioning; meanwhile, set the upper prestressed tendon anchorage section at the lower part of the wall body of the connection layer;

[0032] (4) After completing the tensioning operation, pour joint mortar at the wall joints; pour mortar into the prestressed tendon ducts to enhance the integrity of the structure;

[0033] (5) After the lower part of the operation is completed, take another group of three wall bodies and arrange them from bottom to top, repeating the previous steps;

[0034] (6) When the height of the wall reaches the requirement, the topmost wall body can directly adopt the standard layer, and use its top as the tensioning section to complete the tensioning operation.

[0035] This construction method prefabricates the wall to reduce a large amount of on-site wet work during construction and improve construction efficiency.

[0036] The main innovation of the present invention lies in:

[0037] (1) An extended tension end is proposed and based on this, a curved prestressed tendon layout is adopted, and prestress lap joint is realized through the connection layer. For high-rise buildings, it can be divided into multiple groups of wall combinations according to the actual prestress segmentation requirements. Each combination is provided with a connection layer, and the internal prestress size of each combination can be controlled according to the actual situation. The main significance of the connection layer is that an extended anchorage end is provided in the middle thereof, which can quickly complete re-tensioning during post-earthquake repair. If a connection layer with an extended anchorage section is not provided, then the segmented tension end can only be buried inside the wall, and it is impossible to re-tension the prestressed tendon after the earthquake, and the concept of a recoverable building cannot be realized. At the same time, the connection layer also serves as the prestressed tendon lap joint section, which is specially adjusted according to specific lap joint requirements to achieve standard prefabrication for standard floors and special prefabrication for the connection layer. Greatly improve the factory production efficiency. For the part of the damage concentration block, this configuration uses the corner restraint area instead, that is, stirrups are densely arranged at the corner part. And through the wedge-shaped convex block, the linear type of the lower prestressed tendon is deflected to both sides to make room for the upper prestressed tendon duct and the anchorage end, avoiding steel bar collision. This enables this technical solution to be applied to walls with a smaller width, realizing the segmentation and lap joint of prestressed tendons. In the post-earthquake repair stage, the extended tension end can be used to more conveniently complete the re-tensioning of the prestress, assisted by other post-earthquake repair technologies and recoverable design, to enable the post-earthquake building to quickly resume use. Avoid the demolition and reconstruction links for post-earthquake buildings, and achieve greater economic benefits.

[0038] (2) The concept of segmented prestress is proposed. Through the segmented tension design of the prestress, the application of the self-centering wall system in high-rise buildings is realized, breaking the current limitations. At the same time, according to the specific floor requirements, appropriate prestress can be adopted, greatly reducing the waste of materials and the corresponding construction difficulty, and increasing the flexibility and rationality of the design. The existing self-centering precast concrete shear wall forms a whole by splicing segmented precast wall panels along the vertical direction through prestressed tendons. The prestressed tendons are usually arranged along the wall height, which is difficult to implement for higher buildings, and at the same time, it does not have the ability to adjust the prestress of different floors.

[0039] Compared with the prior art, the present invention has the following advantages:

[0040] (1) The present invention adopts a fully assembled design, and all components are prefabricated in the factory, meeting the requirements of building industrialization. Prestress is applied in segments, reducing the construction difficulty, increasing redundancy, and avoiding the overall failure of the structure caused by the failure of prestress at a certain place;

[0041] (2) The present invention is provided with an extended tension end, which can more conveniently complete the re-tensioning of prestress after an earthquake, assist other post-earthquake repair technologies, and enable the building to be quickly put back into use after the earthquake.

[0042] (3) The prestressed tendons of the present invention are tensioned in segments, breaking through the limitations of the use of prestressed tendons in high-rise buildings; at the same time, different prestress magnitudes can be adopted according to the requirements of different floors, improving the material utilization efficiency.

[0043] (4) The present invention is provided with joints that can swing and lift at key floors, which can reduce the seismic response of the overall structure, effectively reduce the internal forces of the self-centering walls during an earthquake, and avoid premature failure of the walls at the locations with large forces, thus losing the effectiveness of the walls. Brief Description of the Drawings

[0044] Figure 1 It is a front view schematic diagram of the connection between the wall and the foundation in the embodiment of the present invention.

[0045] Figure 2 It is a front view schematic diagram of the connection between the standard floor and the connection floor in the embodiment of the present invention.

[0046] Figure 3 It is a side view schematic diagram of the connection between the standard floor and the connection floor in the embodiment of the present invention.

[0047] Description of the Marks in the Drawings:

[0048] 1 - Foundation, 2 - Standard Floor, 3 - Prestressed Tendon Duct, 4 - Anchorage End, 5 - Energy Dissipation Steel Bar, 6 - Joint Mortar, 7 - Connecting Steel Bar, 8 - Connection Floor, 9 - Wedge-shaped Protrusion, 10 - Corner Constraint Area, 11 - Spiral Stirrup. Detailed Embodiment

[0049] The present invention will be described in detail below with reference to specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and the detailed implementation manner and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0050] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Embodiment:

[0053] An extended-anchorage segmented post-tensioned precast self-centering wall system includes a foundation 1, standard floors 2, prestressing tendon ducts 3, anchorage ends 4, energy-dissipating steel bars 5, joint mortar 6, connecting steel bars 7, connection floors 8, wedge-shaped protrusions 9, corner restraint zones 10, and spiral stirrups 11. The self-centering wall is composed of a combination of walls spliced successively from the foundation 1 from bottom to top. The wall combination consists of two standard floors 2 and one connection floor 8 as a group. In each group, the standard floors 2 and the connection floor 8 are spliced by post-tensioned prestressing tendons. The lower prestressing tendons are anchored at the wedge-shaped protrusions 9 of the connection floor 8, and the upper prestressing tendons are anchored inside the connection floor 8.

[0054] As Figure 2 and 3 shown, four pairs of wedge-shaped protrusions 9 are symmetrically arranged at the middle and lower positions on both sides of the wall for the connection floor 8. Prestressing tendon ducts 3 are reserved in both the standard floors 2 and the connection floor 8. Among them, the prestressing tendon ducts 3 of the standard floors 2 are arranged longitudinally through the upper and lower parts, and the layout in the duct plane adopts a double-axisymmetric form. The lower prestressing tendon ducts 3 in the connection floor 8 are in an arc shape, extending from the bottom to the wedge-shaped protrusions 9 on both sides and being anchored at the wedge-shaped protrusions 9. Spiral stirrups 11 are arranged at the top; the upper prestressing tendon ducts 3 in the connection floor 8 are arranged vertically and are anchored in the middle of the wall of the connection floor 8. The segmented post-tensioned self-centering wall can swing during an earthquake above the bottom, and the prestressing tendons provide the restoring force after the lateral deformation of the wall. A joint where the floor can swing and lift is provided at the connection between the standard floors 2 and the connection floor 8. A 20-mm-thick joint mortar 6 is provided for the joint where the floor can swing and lift. Energy-dissipating steel bars 5 are arranged in the middle of the upper and lower walls of the joint where the floor can swing and lift. A joint for the non-swing interface floor is provided at the connection between the standard floors 2 and the connection floor 8. Connecting steel bars 7 are arranged at both ends of the joint for the non-swing interface floor to prevent the floor joint from lifting. Dense stirrups are provided at the corners of the upper wall of the joint for the non-swing interface floor to form a corner restraint zone 10.

[0055] As Figure 1As shown in the figure, a joint is provided at the connection between the wall body and the foundation 1. A joint mortar 6 with a thickness of 20 mm is provided at the joint. Energy-dissipating steel bars 5 are provided in the middle of the upper and lower walls of the joint. Stirrups are encrypted at the corners of the upper wall of the joint to form a corner restraint area 10. A joint of a non-sway interface floor is provided at the connection between the standard floors 2. Connecting steel bars 7 are provided at both ends of the joint of the non-sway interface floor to prevent the floor joint from lifting.

[0056] The internal prestressed tendon ducts 3 of a group of wall bodies are aligned vertically. After hoisting is completed, prestressed tendons are threaded into the prestressed tendon ducts 3. The tensioning section of the prestressed tendon is the wedge-shaped convex block 9 at the connection layer 8 of the highest layer within the combination. The anchoring section is set at the bottom position of the connection layer 8 in the previous combination. Among them, for the first combination, the anchoring section is set inside the foundation 1; for the top combination, no additional connection layer 8 is provided, and the tensioning section is directly arranged at the top of the highest standard floor 2.

[0057] A construction method for an externally extended and anchored post-tensioned precast self-centering wall system, the construction method comprising the following steps:

[0058] (1) In the factory, the wall body is divided into standard floors 2 and connection layers 8 for prefabrication respectively, and prestressed tendon ducts 3 and energy-dissipating steel bar ducts are reserved;

[0059] (2) At the construction site, the precast wall bodies are arranged from bottom to top on the foundation in the form of three in a group to ensure that the ducts are aligned;

[0060] (3) Set the anchoring section of the prestressed tendon of the first group at the lower part of the foundation 1, thread the prestressed tendon from the preset tensioning section of the connection layer 8, and complete the tensioning; at the same time, set the upper prestressed tendon anchoring section at the lower part of the wall body of the connection layer 8;

[0061] (4) After the tensioning operation is completed, pour joint mortar 6 at the wall joint; pour mortar into the prestressed tendon ducts 3 to enhance the integrity of the structure;

[0062] (5) After the lower operation is completed, take another group of three wall bodies and arrange them from bottom to top, repeating the previous steps;

[0063] (6) When the height of the wall body reaches the requirement, the topmost wall body can directly use the standard floor 2, and its top is directly used as the tensioning section to complete the tensioning operation.

[0064] This construction method prefabricates the wall body, reduces a large amount of on-site wet operations during construction, and improves construction efficiency.

[0065] The post-tensioning design of the prestressed tendons in segments divides the entire wall into multiple wall combinations. In each combination, the prestress can be freely adjusted according to actual needs by changing the diameter, number of prestressed tendons, and tension control stress within the combination. At the same time, the number of standard floors 2 within the combination can also be selected according to the actual situation, effectively reducing the construction difficulty and material loss.

[0066] The above description of the embodiments is to enable those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present invention is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. An externally extended and anchored segmented post-tensioned prefabricated self-centering wall system, characterized in that, it is composed of wall combinations spliced successively from the foundation (1) from bottom to top. The system includes standard floors (2) and connection floors (8). Taking several standard floors (2) and one section of connection floor (8) as a group, within each group, the standard floors (2) and the connection floor (8) are spliced through post-tensioned prestressing tendons; at the lower part of the connection floor (8), externally extended tensioning ends are symmetrically arranged on both sides of the wall. The externally extended tensioning end is a protruding wedge-shaped convex block (9), and an anchoring end (4) is arranged on the upper surface of the wedge-shaped convex block (9); prestressing tendon ducts (3) are reserved inside both the standard floor (2) and the connection floor (8). Among them, the form of the prestressing tendon duct (3) of the standard floor (2) is a straight line arranged longitudinally up and down; the line type of the lower prestressing tendon duct (3) of the connection floor (8) is an arc. The lower prestressing tendons extend from the bottom of the connection floor (8) to the externally extended tensioning ends on both sides and are anchored at the anchoring end (4); the form of the upper prestressing tendon duct (3) of the connection floor (8) is a straight line arranged vertically, and the upper prestressing tendons are anchored inside the connection floor (8).

2. The externally extended and anchored segmented post-tensioned prefabricated self-centering wall system according to claim 1, characterized in that, the wedge-shaped convex block (9) is provided with spiral stirrups (11) at the top of the prestressing tendon duct (3).

3. The externally extended and anchored segmented post-tensioned prefabricated self-centering wall system according to claim 1, characterized in that, a joint for swinging and lifting is provided at the connection between the standard floor (2) and the connection floor (8).

4. The externally extended and anchored segmented post-tensioned prefabricated self-centering wall system according to claim 3, characterized in that, joint mortar (6) is provided at the joint for swinging and lifting, and energy-dissipating steel bars (5) are provided in the middle of the upper and lower walls of the joint for swinging and lifting.

5. The externally extended and anchored segmented post-tensioned prefabricated self-centering wall system according to claim 1, characterized in that, a joint with a non-swinging interface is provided at the connection between the standard floor (2) and the connection floor (8).

6. The externally extended and anchored segmented post-tensioned prefabricated self-centering wall system according to claim 5, characterized in that, connection steel bars (7) are provided at both ends of the joint with a non-swinging interface, and a corner restraint zone (10) is provided at the corner of the upper wall of the joint with a non-swinging interface, and closely spaced stirrups are arranged.

7. The externally extended and anchored segmented post-tensioned prefabricated self-centering wall system according to claim 1, characterized in that, a joint is provided at the connection between the wall and the foundation (1). Joint mortar (6) is provided at the joint, energy-dissipating steel bars (5) are provided in the middle of the upper and lower walls of the joint, and a corner restraint zone (10) is provided at the corner of the upper wall of the joint, and closely spaced stirrups are arranged.

8. The externally extended and anchored segmented post-tensioned prefabricated self-centering wall system according to claim 4 or 7, characterized in that, the thickness of the joint mortar is 10 - 30 mm.

9. The externally extended and anchored segmented post-tensioned prefabricated self-centering wall system according to claim 1, characterized in that, A joint is provided at the connection between the standard floors (2), and connecting steel bars (7) are provided at both ends of the joint of the non-sway interface.

10. A cantilever-anchored segmented post-tensioned prefabricated self-centering wall system according to claim 1, wherein, The internal prestressing tendon ducts (3) of a group of wall combinations are aligned vertically. After hoisting, prestressing tendons are threaded through the prestressing tendon ducts (3). The tensioning section of the prestressing tendon is the cantilever tensioning end at the connection layer (8) of the highest layer within the combination, and the anchoring section is arranged at the bottom position of the connection layer (8) of the previous combination. Among them, for the first combination, the anchoring section is arranged inside the foundation (1); for the top combination, no additional connection layer (8) is provided, and the tensioning section is directly arranged at the top of the highest standard floor (2).

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