Self-resetting assembled concrete shear wall device and construction method thereof

Abstract

The application discloses a self-resetting assembled concrete shear wall device, which comprises an assembled concrete shear wall I, an assembled concrete shear wall II, a shearing type energy dissipation section and a self-resetting connection; the assembled concrete shear wall I comprises end longitudinal reinforcement I, sleeve longitudinal reinforcement I, middle longitudinal reinforcement I, a grouting sleeve and a pre-buried component; and the assembled concrete shear wall II comprises end longitudinal reinforcement II, sleeve longitudinal reinforcement II, middle longitudinal reinforcement II and a pre-buried component. The self-resetting connection at the left and right sides of the bottom provides energy dissipation capacity and self-resetting capacity, and prevents the concrete at the left and right sides of the bottom from being damaged under the action of tension. Meanwhile, the shearing type energy dissipation section at the middle bottom can provide sufficient shearing bearing capacity for the assembled concrete beam force wall, so that the shear wall body at the left and right sides of the bottom will not be sheared and damaged after being weakened, and the device has the characteristics of reasonable force bearing, simple structure, good seismic performance, strong self-resetting capacity, small damage after earthquake and the like.

Description

Self-resetting prefabricated concrete shear wall device and its construction method Technical Field

[0001] This invention relates to the field of prefabricated concrete structure technology, and in particular to a self-resetting prefabricated concrete shear wall device and its construction method. Background Technology

[0002] Prefabricated concrete shear wall structures are the most widely used and fastest-growing structural system in prefabricated buildings in my country in recent years. Under seismic loading, prefabricated concrete shear walls exhibit good lateral stiffness and seismic performance; however, under repeated loads, concrete crushing occurs on both sides of the bottom of the shear wall. Furthermore, while the hysteresis curve of prefabricated concrete shear walls is full after seismic loading, its residual deformation is significant. In addition, recoverable functional structures are currently a research hotspot and future development trend in earthquake engineering. These structures utilize mechanisms such as self-resetting, replaceability, and energy dissipation to restore their functionality after an earthquake, requiring little or no repair while meeting seismic fortification objectives. The self-resetting mechanism reduces residual deformation caused by yielding of components, effectively improving the structure's recoverable functional capacity. Currently, prefabricated shear walls suffer from severe bottom damage, large residual deformation, poor seismic performance, and weak post-earthquake functional recovery capabilities. Summary of the Invention

[0003] The present invention aims to at least improve one of the technical problems existing in the prior art. To this end, the present invention proposes a self-resetting prefabricated concrete shear wall device and its construction method.

[0004] A self-resetting prefabricated concrete shear wall device according to a first aspect of the present invention is characterized in that it comprises: a prefabricated concrete shear wall I, a prefabricated concrete shear wall II, a shear-type energy dissipation section, and a self-resetting connector; wherein:

[0005] The prefabricated concrete shear wall I includes end longitudinal bars I, sleeve longitudinal bars I, intermediate longitudinal bars I, grouting sleeves, and embedded components; one end of the end longitudinal bars I is provided with thread I; one end of the sleeve longitudinal bars I is provided with thread III;

[0006] The prefabricated concrete shear wall II includes end longitudinal reinforcement II, sleeve longitudinal reinforcement II, intermediate longitudinal reinforcement II, and embedded components; one end of the end longitudinal reinforcement II is provided with thread III; one end of the sleeve longitudinal reinforcement II is provided with thread IV; the embedded components include end plate II, two cross-shaped shear connectors, four embedded single-sided sleeves, and four embedded mechanical sleeves; the end plate II has eight circular holes IV; the cross-shaped shear connectors, embedded single-sided sleeves, and embedded mechanical sleeves are all located on one side of the end plate II; one side of the cross-shaped shear connectors, the embedded single-sided sleeves, and the embedded mechanical sleeves are all welded to the end plate II; the cross-shaped shear connectors, embedded single-sided sleeves, and embedded mechanical sleeves in the embedded components are all located on the side close to the prefabricated concrete shear wall I and the prefabricated concrete shear wall II.

[0007] The self-resetting connector includes two I-beam connectors, an SMA rod, and a disc spring. The I-beam connector includes an upper flange, a lower flange, a web, and stiffening ribs I. The stiffening ribs I are symmetrically arranged on both sides of the web. The upper flange has four circular holes I. The lower flange has four circular holes II. The upper flange is welded to the web and stiffening ribs I. The lower flange is also welded to the web and stiffening ribs I. The SMA rod has threads V at both ends. The disc spring is fitted onto the SMA rod. The SMA rod and disc spring are positioned between the lower flanges of the two I-beam connectors.

[0008] The shear-type energy-dissipating section includes an upper flange, a lower flange, a web, stiffening ribs II, and end plates I. The stiffening ribs II are symmetrically arranged along the web. The end plates I are located at both ends of the shear-type energy-dissipating section. The end plates I have eight circular holes III. The upper flange of the energy-dissipating section is welded to the web and end plates I. The lower flange of the energy-dissipating section is welded to the web and end plates I.

[0009] According to an embodiment of the present invention, a self-resetting prefabricated concrete shear wall device is constructed by using prefabricated concrete shear wall I, prefabricated concrete shear wall II, a shear-type energy dissipation section, and a self-resetting connection in combination. A self-resetting connection is designed at the bottom connection points on both sides of prefabricated concrete shear wall I and prefabricated concrete shear wall II, and SMA rods and disc springs provide energy dissipation and self-resetting capabilities for the prefabricated concrete shear wall. A shear-type energy dissipation section is provided at the middle bottom connection point of prefabricated concrete shear wall I and prefabricated concrete shear wall II, and shear force is transferred to the shear wall through pre-embedded components at both ends of the energy dissipation section. Based on this, it can be effectively ensured that the concrete at the bottom of both sides of the prefabricated concrete shear wall does not crack or crush under tensile and compressive loads. At the same time, the shear bearing capacity after the bottom section is weakened is borne by the shear-type energy dissipation section, which ensures the joint use of prefabricated concrete shear wall I, prefabricated concrete shear wall II, shear-type energy dissipation section and self-resetting connection. This effectively improves the stress performance, self-resetting ability, seismic performance and post-earthquake functional recovery ability of prefabricated concrete shear wall, and achieves considerable economic benefits.

[0010] In one possible implementation of the first aspect, the prefabricated concrete shear wall I, prefabricated concrete shear wall II, upper flange of the I-beam, and lower flange of the I-beam are of equal width; the centers of the end longitudinal reinforcement I, thread I, and circular hole I coincide; the centers of the end longitudinal reinforcement II, thread III, circular hole I, washer, and nut coincide; and the centers of the SMA rod, disc spring, circular hole II, washer, and nut coincide, so that the SMA rod and disc spring can dissipate energy and return to their original position under tension and compression.

[0011] In one possible implementation of the first aspect, washers and nuts are respectively provided at both ends of the SMA bar from the inside out; washers and nuts are respectively provided at the ends of the end longitudinal reinforcement I and end longitudinal reinforcement II from the inside out; the web of the I-beam is perpendicular to the prefabricated concrete shear wall I, thereby realizing the assembly of the SMA bar and the disc spring.

[0012] In one possible implementation of the first aspect, the centers of the sleeve longitudinal reinforcement I, sleeve longitudinal reinforcement II, and grouting sleeve coincide; the grouting layer is disposed between the prefabricated concrete shear wall I and the prefabricated concrete shear wall II and is flush with the outer surface; cement-based grouting material is injected into the grouting sleeve to form a reliable connection between the prefabricated concrete shear wall I and the prefabricated concrete shear wall II.

[0013] In one possible implementation of the first aspect, the thickness of the grouting layer is 20 mm to ensure that no overflow occurs when cement-based grout is injected into the grouting sleeve.

[0014] In one possible implementation of the first aspect, the dimensions of end plate I and end plate II are equal; the center of the shear-type energy dissipation section coincides with the center of end plate II; the two cross-shaped shear connectors in the pre-embedded components are arranged on the extension line of the side away from the upper flange and lower flange of the energy dissipation section, so as to ensure that the shear energy of the energy dissipation section is fully transferred to the two cross-shaped shear connectors.

[0015] In one possible implementation of the first aspect, in order for both ends of the single-sided flange of the energy-dissipating section to be connected to the embedded components via high-strength bolts, four embedded single-sided sleeves are disposed on both sides of the upper flange and the lower flange of the energy-dissipating section, and four embedded mechanical sleeves are disposed between the upper flange and the lower flange of the energy-dissipating section. The embedded mechanical sleeves are used to connect the high-strength steel bars to the embedded components, and the middle of the single-sided flange of the energy-dissipating section can be connected to the embedded components via high-strength bolts.

[0016] In one possible implementation of the first aspect, the centers of the pre-embedded single-sided sleeve, high-strength bolt, washer, and circular hole IV coincide; the centers of the pre-embedded mechanical sleeve, high-strength bolt, washer, circular hole IV, thread III, and thread IV coincide; and both thread III and thread IV need to be pre-screwed into the pre-embedded mechanical sleeve.

[0017] In one possible implementation of the first aspect, the self-resetting connector is at the same height as the shear-type energy dissipation section, so that the bottom shear-type energy dissipation section can better exert its shear resistance.

[0018] The construction method for a self-resetting prefabricated concrete shear wall device according to a second aspect of the present invention, applied to the preparation of the self-resetting prefabricated concrete shear wall device as described above, includes the following specific steps:

[0019] Step S1. Fabricate prefabricated concrete shear wall I, prefabricated concrete shear wall II, shear-type energy dissipation section, two I-beam connectors, SMA rods and disc springs in the factory;

[0020] Step S2. Transport all prefabricated components to the construction site and install the prefabricated concrete shear wall I and prefabricated concrete shear wall II on site;

[0021] Step S3. Set the shear-type energy dissipation section between the prefabricated concrete shear wall I and the prefabricated concrete shear wall II, and bolt it with high-strength bolts;

[0022] Step S4. Set a 20mm grouting layer at the connection between prefabricated concrete shear wall I and prefabricated concrete shear wall II, and inject cement-based grouting material into the grouting sleeve;

[0023] Step S5. Set the lower I-beam connector on the prefabricated concrete shear wall II, and fix the upper flange of the I-beam to thread II with washers and nuts;

[0024] Step S6. Insert the SMA rod and disc spring into the round hole II of the lower I-shaped connection, and then connect the upper flange of the upper I-shaped part to the thread I for fixation;

[0025] Step S7. Place the SMA rod and disc spring between the lower flanges of the two I-shaped connectors, and fix them at both ends with washers and nuts respectively.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 is a structural schematic diagram of a self-resetting prefabricated concrete shear wall device according to an embodiment of the present invention;

[0029] Figure 2 is a diagram of the prefabricated concrete shear wall I shown in Figure 1;

[0030] Figure 3 is a diagram of the prefabricated concrete shear wall II shown in Figure 1;

[0031] Figure 4 is a diagram of the shear-type energy consumption segment in Figure 1;

[0032] Figure 5 shows the self-resetting connection in Figure 1;

[0033] Figure 6 is a cross-sectional view of Figure 1 (AA section);

[0034] Figure 7 is a cross-sectional view of BB in Figure 1;

[0035] Figure 8 is a CC cross-sectional view of Figure 1;

[0036] Figure 9 is a cross-sectional view of DD in Figure 1;

[0037] Figure 10 is a cross-sectional view of the EE in Figure 1;

[0038] Figure 11 is a cross-sectional view of FF in Figure 1;

[0039] Figure 12 is a cross-sectional view of GG in Figure 2;

[0040] Figure 13 is a cross-sectional view of HH in Figure 2;

[0041] Figure 14 is a cross-sectional view of Figure 2 (section II);

[0042] Figure 15 is a cross-sectional view of JJ in Figure 2;

[0043] Figure 16 is a cross-sectional view of KK in Figure 3;

[0044] Figure 17 shows the embedded components in Figure 3;

[0045] Figure 18 is a cross-sectional view of LL in Figure 4;

[0046] Figure 19 shows the I-shaped connector from Figure 5.

[0047] Figure label:

[0048] 1. Precast concrete shear wall I; 2. Precast concrete shear wall II; 3. Upper flange of energy dissipation section; 4. End longitudinal reinforcement I; 5. Sleeve longitudinal reinforcement I; 6. Intermediate longitudinal reinforcement I; 7. End longitudinal reinforcement II; 8. Sleeve longitudinal reinforcement II; 9. Intermediate longitudinal reinforcement II; 10. Upper flange of I-beam; 11. Stiffening rib I; 12. SMA bar; 13. Disc spring; 14. Grouting sleeve; 15. Cement-based grouting material; 16. Stiffening rib II; 17. End plate I; 18. End plate II; 19. 20. Cross-shaped shear connector; 21. Embedded single-sided sleeve; 22. Embedded mechanical sleeve; 23. High-strength bolt; 24. Mortar bedding layer; 25. Gasket; 26. Nut; 27. Circular hole I; 28. Circular hole II; 29. ​​Circular hole III; 30. Thread I; 31. Thread II; 32. Thread III; 33. Thread IV; 34. Thread V; 101. Lower flange of I-beam; 102. Web of I-beam; 301. Lower flange of energy dissipation section; 302. Web of energy dissipation section. Detailed Implementation

[0049] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0050] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0051] Example 1

[0052] Referring to Figures 1 to 19, this embodiment provides a self-resetting prefabricated concrete shear wall device, including: a prefabricated concrete shear wall I1, a prefabricated concrete shear wall II2, a shear-type energy dissipation section, and a self-resetting connector; wherein:

[0053] The prefabricated concrete shear wall I1 includes end longitudinal bars I4, sleeve longitudinal bars I5, intermediate longitudinal bars I6, grouting sleeves 14, and embedded components; one end of the end longitudinal bar I4 is provided with thread I30; one end of the sleeve longitudinal bar I5 is provided with thread III32.

[0054] The prefabricated concrete shear wall II2 includes end longitudinal reinforcement II7, sleeve longitudinal reinforcement II8, intermediate longitudinal reinforcement II9, and embedded components; one end of the end longitudinal reinforcement II7 is provided with thread III31; one end of the sleeve longitudinal reinforcement II8 is provided with thread IV33; the embedded components include end plate II18, two cross-shaped shear connectors 19, four embedded single-sided sleeves 20, and four embedded mechanical sleeves 21; the end plate II18 has eight circular holes IV29; the cross-shaped shear connectors 19, embedded single-sided sleeves 20, and embedded mechanical sleeves 21 are all located on one side of the end plate II18; one side of the cross-shaped shear connectors 19, the embedded single-sided sleeves 20, and the embedded mechanical sleeves 21 are all welded to the end plate II18; the cross-shaped shear connectors 19, embedded single-sided sleeves 20, and embedded mechanical sleeves 21 in the embedded components are all located on the side close to the prefabricated concrete shear wall I1 and the prefabricated concrete shear wall II2.

[0055] The self-resetting connector includes two I-beam connectors, an SMA rod 12, and a disc spring 13. The I-beam connector includes an upper flange 10, a lower flange 101, a web 102, and stiffening ribs I11. The stiffening ribs I11 are symmetrically arranged on both sides of the web 102. The upper flange 10 has four circular holes I26. The lower flange 101 has four circular holes II27. The upper flange 10 is welded to the web 102 and stiffening ribs I11. The lower flange 101 is also welded to the web 102 and stiffening ribs I11. The SMA rod has threads V34 at both ends. The disc spring 13 is fitted onto the SMA rod 12. The SMA rod 12 and disc spring 13 are positioned between the lower flanges 101 of the two I-beam connectors.

[0056] The shear-type energy-dissipating section includes an upper flange 3, a lower flange 301, a web 302, stiffening ribs II 16, and end plates I 17. The stiffening ribs II 16 are symmetrically arranged along the web 302. The end plates I 17 are located at both ends of the shear-type energy-dissipating section. The end plates I 17 have eight circular holes III 28. The upper flange 3 is welded to the web 302 and end plates I 17. The lower flange 301 is welded to the web 302 and end plates I 17.

[0057] According to an embodiment of the present invention, a self-resetting prefabricated concrete shear wall device is constructed by using prefabricated concrete shear wall I, prefabricated concrete shear wall II, a shear-type energy dissipation section, and a self-resetting connection in combination. A self-resetting connection is designed at the bottom connection points on both sides of prefabricated concrete shear wall I and prefabricated concrete shear wall II, and SMA rods and disc springs provide energy dissipation and self-resetting capabilities for the prefabricated concrete shear wall. A shear-type energy dissipation section is provided at the middle bottom connection point of prefabricated concrete shear wall I and prefabricated concrete shear wall II, and shear force is transferred to the shear wall through pre-embedded components at both ends of the energy dissipation section. Based on this, it can be effectively ensured that the concrete at the bottom of both sides of the prefabricated concrete shear wall does not crack or crush under tensile and compressive loads. At the same time, the shear bearing capacity after the bottom section is weakened is borne by the shear-type energy dissipation section, which ensures the joint use of prefabricated concrete shear wall I, prefabricated concrete shear wall II, shear-type energy dissipation section and self-resetting connection. This effectively improves the stress performance, self-resetting ability, seismic performance and post-earthquake functional recovery ability of prefabricated concrete shear wall, and achieves considerable economic benefits.

[0058] It should be noted that the widths of the prefabricated concrete shear wall I1, prefabricated concrete shear wall II2, upper flange 10 of the I-beam, and lower flange 101 of the I-beam are equal; the centers of the end longitudinal reinforcement I4, thread I30, and round hole I26 coincide; the centers of the end longitudinal reinforcement II7, thread III32, round hole I26, washer 24, and nut 25 coincide; and the centers of the SMA rod 12, disc spring 13, round hole II27, washer 24, and nut 25 coincide, so that the SMA rod and disc spring can dissipate energy and return to their original position under tension and compression.

[0059] It should be noted that the SMA rod 12 is provided with a washer 24 and a nut 25 from the inside to the outside at both ends; the end longitudinal ribs I4 and II7 are provided with a washer 24 and a nut 25 from the inside to the outside at their ends; the web plate 102 of the I-beam is perpendicular to the prefabricated concrete shear wall I1, thereby realizing the assembly of the SMA rod and the disc spring.

[0060] It should be noted that the centers of the sleeve longitudinal reinforcement I5, sleeve longitudinal reinforcement II8, and grouting sleeve 14 coincide; the grouting layer 23 is set between the prefabricated concrete shear wall I1 and the prefabricated concrete shear wall II2 and is flush with the outer surface; cement-based grouting material 15 is injected into the grouting sleeve 14 to form a reliable connection between the prefabricated concrete shear wall I1 and the prefabricated concrete shear wall II2.

[0061] It should be noted that the thickness of the grouting layer 23 is 20mm, which ensures that the cement-based grouting material will not overflow when it is injected into the grouting sleeve.

[0062] It should be noted that the dimensions of end plate I 17 and end plate II 18 are equal; the center of the shear-type energy dissipation section coincides with the center of end plate II 18; the two cross-shaped shear connectors 19 in the pre-embedded components are set on the extension line away from the upper flange 3 and the lower flange 301 of the energy dissipation section, so as to ensure that the shear force of the energy dissipation section is fully transferred to the two cross-shaped shear connectors.

[0063] It should be noted that, in order to enable the two ends of the energy-dissipating section's single-sided flange to be connected to the embedded components via high-strength bolts, the four embedded single-sided sleeves 20 are positioned on both sides of the upper flange 3 and the lower flange 301 of the energy-dissipating section; the four embedded mechanical sleeves 21 are positioned between the upper flange 3 and the lower flange 301 of the energy-dissipating section. The embedded mechanical sleeves are used to connect the high-strength steel bars to the embedded components, and the middle of the energy-dissipating section's single-sided flange can be connected to the embedded components via high-strength bolts.

[0064] It should be noted that the centers of the pre-embedded single-sided sleeve 20, high-strength bolt 22, washer 24, and round hole IV 29 coincide; the centers of the pre-embedded mechanical sleeve 21, high-strength bolt 22, washer 24, round hole IV 29, thread III 32, and thread IV 33 coincide; and the threads III 32 and IV 33 must be pre-screwed into the pre-embedded mechanical sleeve 21.

[0065] It should be noted that the self-resetting connector is at the same height as the shear-type energy dissipation section so that the bottom shear-type energy dissipation section can better exert its shear resistance.

[0066] Example 2

[0067] The construction method for a self-resetting prefabricated concrete shear wall device according to a second aspect of the present invention, applied to the preparation of the self-resetting prefabricated concrete shear wall device as described above, includes the following specific steps:

[0068] Step S1. Fabricate prefabricated concrete shear wall I1, prefabricated concrete shear wall II2, shear-type energy dissipation section, two I-beam connectors, SMA rod 12 and disc spring 13 in the factory;

[0069] Step S2. Transport all prefabricated components to the construction site and install the prefabricated concrete shear wall I1 and prefabricated concrete shear wall II2 on site;

[0070] Step S3. Set the shear-type energy dissipation section between the prefabricated concrete shear wall I1 and the prefabricated concrete shear wall II2, and use high-strength bolts 22.

[0071] Step S4. Set a 20mm grouting layer 23 at the connection between the prefabricated concrete shear wall I1 and the prefabricated concrete shear wall II2, and inject cement-based grouting material 15 into the grouting sleeve 14.

[0072] Step S5. Set the lower I-beam connector on the prefabricated concrete shear wall II2, and fix the upper flange 10 of the I-beam to the thread II31 with a washer 24 and a nut 25.

[0073] Step S6. Insert the SMA rod 12 and disc spring 13 into the round hole II 27 of the lower I-shaped connection, and then connect the upper flange 10 of the upper I-shaped part to the thread I 30 for fixation;

[0074] Step S7. Place the SMA rod 12 and disc spring 13 between the lower flanges 101 of the two I-shaped connectors, and fix them at both ends with washers 24 and nuts 25 respectively, to obtain a self-resetting prefabricated concrete shear wall device.

[0075] The self-resetting prefabricated concrete shear wall device manufactured using the construction method described in this embodiment features reasonable stress distribution, simple structure, good seismic performance, strong self-resetting ability, and minimal post-earthquake damage. It is anticipated that under seismic action, the shear-type energy-dissipating section at the bottom center will bear the shear force of the prefabricated concrete shear wall, ensuring sufficient shear bearing capacity even after the bottom section is weakened. The SMA rods and disc springs in the self-resetting connectors at both ends of the bottom enhance the reset and energy dissipation capabilities of the prefabricated concrete shear wall, preventing crushing of the bottom concrete and effectively reducing component damage. In the embedded components at both ends of the shear-type energy-dissipating section, the cross-shaped shear connectors effectively transfer the shear force generated by the energy-dissipating section, ensuring that shear failure does not occur at the connection point.

[0076] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0077] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0078] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0079] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A self-resetting prefabricated concrete shear wall device, characterized in that, include: Prefabricated concrete shear wall I (1), prefabricated concrete shear wall II (2), shear-type energy dissipation section and self-resetting connector; wherein: the prefabricated concrete shear wall I (1) includes end longitudinal reinforcement I (4), sleeve longitudinal reinforcement I (5), intermediate longitudinal reinforcement I (6), grouting sleeve (14) and embedded components; one end of the end longitudinal reinforcement I (4) is provided with thread I (30); one end of the intermediate longitudinal reinforcement I (6) is provided with thread III (32); the prefabricated concrete shear wall II (2) includes end longitudinal reinforcement II (7), sleeve longitudinal reinforcement II (8), intermediate longitudinal reinforcement II (9) and embedded components; one end of the end longitudinal reinforcement II (7) is provided with thread II (31); one end of the intermediate longitudinal reinforcement II (9) is provided with thread IV (33). The embedded components include end plate II (18), two cross-shaped shear connectors (19), four embedded single-sided sleeves (20), and four embedded mechanical sleeves (21); the end plate II (18) has eight circular holes IV (29); the cross-shaped shear connectors (19), embedded single-sided sleeves (20), and embedded mechanical sleeves (21) are all located on one side of the end plate II (18); the cross-shaped shear connectors (19), embedded single-sided sleeves (20), and embedded mechanical sleeves (21) are all welded to the end plate II (18); the cross-shaped shear connectors (19), embedded single-sided sleeves (20), and embedded mechanical sleeves (21) in the embedded components are all located near the prefabricated concrete shear wall I ( 1) One side of the prefabricated concrete shear wall II (2); the self-resetting connector includes two I-beam connectors, an SMA rod (12), and a disc spring (13); the I-beam connector includes an upper flange (10), a lower flange (101), a web (102), and stiffening rib I (11); the stiffening rib I (11) is symmetrically arranged on both sides of the web (102); the upper flange (10) of the I-beam has four round holes I (26); the lower flange (101) of the I-beam has four round holes II (27); the upper flange (10) of the I-beam is welded to the web (102) and stiffening rib I (11); the lower flange (101) of the I-beam is welded to the web (102) and stiffening rib I (11). The web plate (102) and stiffening rib I (11) of the I-beam are welded together; both ends of the SMA bar are provided with threaded V (34); the disc spring (13) is sleeved on the SMA bar (12); the SMA bar (12) and disc spring (13) are arranged between the lower flanges (101) of the I-beams in the two I-beam connectors; the shear-type energy dissipation section includes the upper flange (3) of the energy dissipation section, the lower flange (301) of the energy dissipation section, the web plate (302) of the energy dissipation section, stiffening rib II (16) and end plate I (17); the stiffening rib II (16) is symmetrically arranged along the web plate (302) of the energy dissipation section; the end plate I (17) is arranged at both ends of the shear-type energy dissipation section; the end plate I (17) has eight round holes III (28) opened on it.The upper flange (3) of the energy-dissipating section is welded to the web (302) and end plate I (17) of the energy-dissipating section; the lower flange (301) of the energy-dissipating section is welded to the web (302) and end plate I (17) of the energy-dissipating section.

2. The self-resetting prefabricated concrete shear wall device according to claim 1, characterized in that, The SMA rod (12) has gaskets (24) and nuts (25) installed at both ends from the inside out; the end longitudinal reinforcement I (4) and end longitudinal reinforcement II (7) have gaskets (24) and nuts (25) installed at their ends from the inside out; the web of the I-beam (102) is perpendicular to the prefabricated concrete shear wall I (1).

3. The self-resetting prefabricated concrete shear wall device according to claim 2, characterized in that, The widths of the prefabricated concrete shear wall I (1), prefabricated concrete shear wall II (2), upper flange (10) of the I-beam, and lower flange (101) of the I-beam are equal; the centers of the end longitudinal reinforcement I (4), thread I (30), and round hole I (26) coincide; the centers of the end longitudinal reinforcement II (7), round hole I (26), washer (24), and nut (25) coincide; the centers of the SMA rod (12), disc spring (13), round hole II (27), washer (24), and nut (25) coincide.

4. The self-resetting prefabricated concrete shear wall device according to claim 1, characterized in that, The centers of the sleeve longitudinal reinforcement I (5), sleeve longitudinal reinforcement II (8), and grouting sleeve (14) coincide; the grouting layer (23) is set between the prefabricated concrete shear wall I (1) and the prefabricated concrete shear wall II (2) and is flush with the outer surface; cement-based grouting material (15) is injected into the grouting sleeve (14).

5. The self-resetting prefabricated concrete shear wall device according to claim 4, characterized in that, The thickness of the grout layer (23) is 20 mm.

6. The self-resetting prefabricated concrete shear wall device according to claim 1, characterized in that, The dimensions of end plate I (17) and end plate II (18) are equal; the center of the shear-type energy dissipation section coincides with the center of end plate II (18); the two cross-shaped shear connectors (19) in the pre-embedded components are set on the extension line on the side away from the upper flange (3) and lower flange (301) of the energy dissipation section.

7. The self-resetting prefabricated concrete shear wall device according to claim 1, characterized in that, The four pre-embedded single-sided sleeves (20) are set on both sides of the upper flange (3) and the lower flange (301) of the energy-consuming section; the four pre-embedded mechanical sleeves (21) are set between the upper flange (3) and the lower flange (301) of the energy-consuming section.

8. The self-resetting prefabricated concrete shear wall device according to claim 2, characterized in that, The centers of the pre-embedded single-sided sleeve (20), high-strength bolt (22), washer (24), and round hole IV (29) are coincident; the centers of the pre-embedded mechanical sleeve (21), high-strength bolt (22), washer (24), round hole IV (29), thread III (32), and thread IV (33) are coincident; the threads III (32) and IV (33) must be pre-screwed into the pre-embedded mechanical sleeve (21).

9. The self-resetting prefabricated concrete shear wall device according to claim 1, characterized in that, The self-resetting connector is at the same height as the shear-type energy-dissipating section.

10. A construction method for a self-resetting prefabricated concrete shear wall device, applied to the preparation of a self-resetting prefabricated concrete shear wall device as described in any one of claims 1-9, comprising the following specific steps: Step S1. Fabricate prefabricated concrete shear wall I (1), prefabricated concrete shear wall II (2), shear-type energy dissipation section, two I-beam connectors, SMA rod (12), and disc spring (13) in the factory; Step S2. Transport the prefabricated components to the construction site and install prefabricated concrete shear wall I (1) and prefabricated concrete shear wall II (2) on site; Step S3. Set the shear-type energy dissipation section between prefabricated concrete shear wall I (1) and prefabricated concrete shear wall II (2) and bolt it with high-strength bolts (22); Step S4. Set a 20mm grouting layer (23) at the connection between prefabricated concrete shear wall I (1) and prefabricated concrete shear wall II (2) and inject cement-based grouting material (15) into the grouting sleeve (14); Step S5. Set the lower I-shaped connector on the prefabricated concrete shear wall II (2), and fix the upper flange (10) of the I-beam to the thread II (31) with a washer (24) and a nut (25); Step S6. Insert the SMA rod (12) and the disc spring (13) into the round hole II (27) of the lower I-shaped connector, and then fix the upper flange (10) of the upper I-shaped connector to the thread I (30); Step S7. Set the SMA rod (12) and the disc spring (13) between the lower flanges (101) of the two I-shaped connectors, and fix them at both ends with a washer (24) and a nut (25).

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