Self-resetting assembled steel plate shear wall based on SMA and its construction and installation method

Abstract

The present invention provides a self-resetting assembled steel plate shear wall based on SMA and a construction and installation method thereof, wherein the shear wall comprises two structural columns, at least two I-beams are arranged in parallel between the two structural columns, an embedded steel plate having at least one set of parallel opposite sides is installed between any two adjacent I-beams, a set of parallel opposite sides of the embedded steel plate are respectively fixed on the two I-beams by bolts, and there is a spacing between the structural column and the embedded steel plate; an SMA strand unit is arranged on the embedded steel plate, the SMA strand unit comprises an SMA strand groove and an SMA strand, the SMA strand groove comprises two stiffening ribs arranged in parallel on the embedded steel plate, the SMA strand is located in the SMA strand groove, and both ends are respectively fixed on the embedded steel plate; the shear wall also comprises a plurality of auxiliary connection devices, and the two sides of each auxiliary connection device are respectively connected to the I-beam bolts and the embedded steel plate by bolts.

Description

Technical Field

[0001] The present invention relates to the technical field of assembled earthquake-resistant structural systems, and in particular to a self-resetting assembled steel plate shear wall based on SMA and a construction and installation method thereof. Background Art

[0002] Since the steel plate shear wall was proposed, the development of the steel plate shear wall system has gone through a process from thick steel plate shear wall to thin steel plate shear wall, and then to buckling-restrained steel plate shear wall. The existing steel plate shear wall system is divided into thick steel plate shear wall, thin steel plate shear wall, buckling-restrained steel plate shear wall (including stiffened steel plate shear wall and buckling-resistance plate shear wall), steel plate-concrete composite steel plate shear wall and other types of steel plate shear wall (including perforated steel plate shear wall, slotted steel plate shear wall and corrugated steel plate shear wall) according to the different stress performance of the embedded wall panels.

[0003] With the rise of prefabricated buildings, steel plate shear walls have also begun to transform from the initial full welding to the use of high-strength bolt connections to meet the needs of assembly. The use of bolt connections can not only improve construction efficiency, but also better ensure construction quality and avoid stress concentration and initial defects caused by a large number of welding. At the same time, the advantages of prefabricated steel plate shear walls are: the steel plate shear wall itself does not bear vertical loads, but it can serve as the first line of seismic defense, and it will be the first to yield and consume energy under the action of an earthquake, ensuring the integrity of the main structure of beams and columns and improving the ability of the structure to resist collapse; after the earthquake, the yielded prefabricated steel plate shear wall can be dismantled and replaced and repaired, so that the seismic performance of the structure can be restored to the pre-earthquake level. This advantage has a good effect on moderate and strong earthquakes, but for more frequent small earthquakes, non-stiffened thin steel plate shear walls may also buckle. At this time, the structure can still provide better energy dissipation capacity, but the initial stiffness decreases a lot, and it needs to be repaired, but it is not economical. At the same time, due to the good ductility of the steel plate shear wall, the residual displacement of the structure after the earthquake may be large, which further increases the difficulty of post-earthquake repair.

[0004] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies of the prior art and thus provide a self-resetting assembled steel plate shear wall based on SMA and a construction and installation method thereof.

[0006] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a self-resetting assembled steel plate shear wall based on SMA, comprising two structural columns, at least two I-beams are arranged in parallel between the two structural columns, an embedded steel plate having at least one set of parallel opposite sides is installed between any two adjacent I-beams, a set of parallel opposite sides of the embedded steel plate is respectively fixed on the two I-beams by bolts, and there is a spacing between the structural column and the embedded steel plate;

[0007] An SMA stranded wire unit is also provided on the embedded steel plate, and the SMA stranded wire unit includes an SMA stranded wire groove and an SMA stranded wire. The SMA stranded wire groove includes two stiffening ribs arranged in parallel on the embedded steel plate. The SMA stranded wire is located in the SMA stranded wire groove, and its two ends are respectively fixed on two sides of the embedded steel plate corresponding to the two ends of the SMA stranded wire groove.

[0008] Based on the above, the SMA stranded wire units are arranged on both sides of the embedded steel plate, and the SMA stranded wire units located on one side of the embedded steel plate and the SMA stranded wire units located on the other side of the embedded steel plate form a spatial intersection.

[0009] Based on the above, the embedded steel plate is a hexagonal embedded steel plate or an octagonal embedded steel plate having at least one set of parallel opposite sides.

[0010] Based on the above, at least one transverse stiffening rib and / or vertical stiffening rib is arranged on the embedded steel plate, and edge stiffening ribs are also fixed on the edge of the embedded steel plate. Two parallel edge stiffening ribs are respectively fixed on two I-beams by bolts, and one end of the SMA stranded wire is respectively fixed on the edge stiffening ribs arranged at both ends of the SMA stranded wire groove.

[0011] Based on the above, it also includes multiple auxiliary connecting devices, the first side of the auxiliary connecting device is bolted to the I-beam, and the second side of the auxiliary connecting device is bolted to an edge stiffening rib of the embedded steel plate; the second side of the auxiliary connecting device is also fixed with one end of the SMA stranded wire.

[0012] Based on the above, the auxiliary connection device includes a triangular steel plate and a right-angled triangular frame formed by welding three steel plates, and the triangular steel plate is embedded in the right-angled triangular frame;

[0013] A right-angled steel plate on one side of the right-angled triangle frame is bolted to the I-beam;

[0014] The hypotenuse steel plate of the right-angled triangle frame is connected to an edge stiffening rib of the embedded steel plate with bolts;

[0015] One end of the SMA stranded wire is also fixed on the hypotenuse steel plate of the right-angled triangle frame of the auxiliary connecting device.

[0016] The present invention also provides a construction and installation method based on the aforementioned self-resetting assembled steel plate shear wall, which specifically includes the following steps:

[0017] Processing to form an I-beam, an embedded steel plate and an auxiliary connection device, wherein the embedded steel plate has at least one set of hexagonal embedded steel plates or octagonal embedded steel plates with parallel opposite sides; the auxiliary connection device comprises a triangular steel plate and a right-angled triangular frame formed by welding three steel plates, and the triangular steel plate is embedded in the right-angled triangular frame;

[0018] A plurality of bolt holes are provided on the flange of the I-beam;

[0019] Welding stiffening ribs at each edge of the embedded steel plate to form edge stiffening ribs, and opening a plurality of bolt holes on all edge stiffening ribs of the embedded steel plate;

[0020] A pair of parallel stiffening ribs are welded on both sides of the embedded steel plate to form an SMA stranded wire channel, and SMA stranded wire connection holes are opened on the edge stiffening ribs on the embedded steel plate corresponding to the two ends of the SMA stranded wire channel;

[0021] A plurality of bolt holes are provided on the three side steel plates of the right-angled triangle frame of the auxiliary connection device, and an SMA stranded wire connection hole is provided on the hypotenuse steel plate of the right-angled triangle frame;

[0022] After the above-mentioned I-beams, polygonal embedded steel plates and auxiliary connection devices are processed, they are transported to the site;

[0023] After the main structure is completed on site, at least two I-beams are fixed to the structural columns of the main structure;

[0024] Each auxiliary connection device is bolted to an I-beam through a right-angled steel plate of its right-angled triangle frame, and two auxiliary connection devices are bolted to each I-beam;

[0025] Insert the embedded steel plate, connect the two parallel edge stiffening ribs of the embedded steel plate to the I-beam bolts respectively, and then connect each auxiliary connection device to one edge stiffening rib of the embedded steel plate through the hypotenuse steel plate of its right-angled triangle frame bolts;

[0026] Install the SMA stranded wire in the SMA stranded wire groove of the embedded steel plate, and pass the two ends of the SMA stranded wire through the SMA stranded wire connection hole on the embedded steel plate and the SMA stranded wire connection hole on the auxiliary connection device respectively, and apply pre-tightening force according to the design to straighten and fix the SMA stranded wire.

[0027] Based on the above, during the processing of the embedded steel plate, the thickness of the embedded steel plate is determined by calculation based on the lateral resistance capacity of the preset self-resetting assembled steel plate shear wall.

[0028] Based on the above, in the process of processing the embedded steel plate, transverse stiffening ribs and longitudinal stiffening ribs can also be arranged on both sides of the embedded steel plate, wherein the number and thickness of the transverse stiffening ribs and longitudinal stiffening ribs are calculated and determined based on the preset self-resetting prefabricated steel plate shear wall bearing capacity.

[0029] Based on the above, when replacing the embedded steel plate, loosen all the connecting bolts, remove the SMA strands from the embedded steel plate, and remove the embedded steel plate from the I-beam and the auxiliary connecting device; after the embedded steel plate is replaced, the embedded steel plate is fixedly connected to the I-beam and the auxiliary connecting device through the connecting bolts, and the SMA strands are reinstalled on the embedded steel plate as required.

[0030] The present invention has outstanding substantive features and significant progress compared to the prior art. Specifically,

[0031] (1) The present invention implants SMA strands in the assembled steel plate shear wall and utilizes the shape memory function of the SMA strands to realize the self-resetting ability of the structure. Under the action of small and medium earthquakes, the SMA strands can provide additional lateral stiffness and participate in energy dissipation, and enable the structure to achieve self-resetting without dismantling and repairing; under the action of larger earthquakes, the self-resetting ability of the SMA strands can be utilized to reduce the inter-layer displacement of the structure after the earthquake, prevent the destructive collapse of the structure, and achieve post-earthquake repairability and easy repair.

[0032] (2) The overall structure of the present invention is connected on-site by fully assembled high-strength bolts, without on-site welding operations. This allows the structure to be effectively used for seismic reinforcement and reconstruction of existing buildings.

[0033] (3) The steel plate shear wall of the present invention adopts a stiffening steel plate as the embedded steel plate, and utilizes longitudinal and transverse stiffening ribs to suppress the overall buckling of the wall panel and improve the initial stiffness of the wall panel.

[0034] (4) The present invention uses oblique stiffening ribs to form SMA stranded wire grooves to prevent the out-of-plane buckling of the wall panel under strong earthquake action from interfering with the work of the SMA stranded wires, while facilitating subsequent maintenance.

[0035] (5) The oblique stiffening grooves of the SMA strands of the present invention are arranged on both sides of the embedded steel plate, forming cross stiffening ribs in disguise, further improving the lateral stiffness of the embedded steel plate, while allowing the SMA strands on both sides to be alternately pulled and compressed without interfering with each other.

[0036] (6) Except for the SMA stranded wire, all other components of the present invention are steel products. Even if they are damaged, they can be replaced and then recycled, thereby achieving recycling. This structure belongs to the category of green building structure.

[0037] (7) The embedded steel plate of the present invention is not connected to the column, so that the size, stiffness and layout of the steel plate can be freely adjusted, which is convenient for the reasonable realization of the building function. And the self-resetting steel plate shear wall can be designed and arranged in a single layer or multiple layers according to the design requirements of the structural lateral resistance capacity. In the case of multi-layer design, the thickness of each embedded steel plate is related to its own preset lateral resistance capacity, so as to achieve the purpose of reasonably controlling the lateral resistance stiffness of each floor.

[0038] (8) The pre-tensioning force required for the SMA stranded wire of the present invention during installation is relatively small, and only the SMA stranded wire needs to be straightened and tightened. The structure is simple, the construction is convenient and fast, and the repair difficulty is relatively low.

[0039] (9) In the present invention, since the SMA material has good durability, the SMA strands can be reused during the post-earthquake repair process, and only the embedded steel plate part needs to be replaced, so the later repair cost is also low. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the main structure of Example 1 of the present invention.

[0041] Figure 2 It is a schematic diagram of the main structure of Example 2 of the present invention.

[0042] Figure 3 It is a schematic diagram of the three-dimensional structure of Example 2 of the present invention.

[0043] Figure 4 It is a schematic diagram of the main structure of Example 3 of the present invention.

[0044] In the figure: 1. Structural column; 2. I-beam; 3. Embedded steel plate; 4. SMA stranded wire channel; 5. SMA stranded wire; 6. Transverse stiffening ribs; 7. Vertical stiffening ribs; 8. Edge stiffening ribs; 9. Auxiliary connection device. DETAILED DESCRIPTION

[0045] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0046] Example 1

[0047] The present embodiment provides a self-resetting assembled steel plate shear wall based on SMA, comprising two structural columns 1, at least two I-beams 2 are arranged in parallel between the two structural columns 1, an embedded steel plate 3 is installed between any two adjacent I-beams 2, and the embedded steel plate 3 has at least one set of parallel opposite sides; a set of parallel opposite sides of the embedded steel plate 3 are respectively fixed on the two I-beams 2 by bolts, and there is a spacing between the structural column 1 and the embedded steel plate 3;

[0048] An SMA stranded wire unit is also provided on the embedded steel plate 3, and the SMA stranded wire unit includes an SMA stranded wire groove 4 and an SMA stranded wire 5. The SMA stranded wire groove 4 includes two stiffening ribs arranged in parallel on the embedded steel plate 3. The SMA stranded wire 5 is located in the SMA stranded wire groove 4, and its two ends are respectively fixed on two edges of the embedded steel plate 3 corresponding to the two ends of the SMA stranded wire groove 4.

[0049] In a specific implementation, the embedded steel plate 3 is a hexagonal embedded steel plate or an octagonal embedded steel plate having at least one set of parallel opposite sides. Figure 1 It is a schematic structural diagram of the shear wall when the embedded steel plate 3 is a regular octagonal embedded steel plate.

[0050] In specific implementation, since there is a gap between the polygonal embedded steel plate 3 and the structural column 1, the size, stiffness and layout of the polygonal embedded steel plate 3 can be freely adjusted, which is convenient for the reasonable realization of the building function. And the self-resetting steel plate shear wall can be designed and arranged in a single layer according to the design requirements of the structural lateral resistance capacity, so as to achieve the purpose of reasonably controlling the lateral stiffness of the self-resetting assembled steel plate shear wall.

[0051] In specific implementation, since the present invention implants the SMA strands 5 in the assembled steel plate shear wall, the self-resetting capability of the structure can be achieved by utilizing the shape memory function of the SMA strands 5. In the case of small and medium earthquakes, the SMA strands 5 can provide additional lateral stiffness and participate in energy dissipation, and the structure can be self-reset without dismantling and repairing; in the case of a larger earthquake, the self-resetting capability of the SMA strands 5 can be utilized to reduce the inter-layer displacement of the structure after the earthquake, prevent the destructive collapse of the structure, and achieve post-earthquake repairability and easy repair.

[0052] Specifically, the stress conditions of the assembled steel plate shear wall described in this embodiment are as follows:

[0053] (1) Horizontal earthquake action often acts on the structural column 1 in the form of horizontal force. When the structural column 1 is subjected to horizontal force, the horizontal force is transmitted from the I-beam 2 to the embedded steel plate 3 through high-strength bolts.

[0054] (2) In the initial stage of stress, when the external force does not reach the buckling load of the embedded steel plate 3, the embedded steel plate 3 does not buckle, and the embedded steel plate 3 is subjected to shear force, the shear stiffness of the embedded steel plate 3 and the lateral stiffness provided by the SMA strand 5 are the initial lateral stiffness of the steel plate shear wall (excluding the structural column 1), which is very large. Theoretically, the SMA strand 5 can also provide a certain lateral stiffness at this stage, but it is almost negligible compared with the shear stiffness of the embedded steel plate 3.

[0055] (3) When the external force reaches the buckling load of the embedded steel plate 3, the embedded steel plate 3 begins to buckle. At this time, the oblique tension band of the embedded steel plate gradually forms, and the force mode of the embedded steel plate 3 gradually changes from shear resistance to oblique tension along the tension band. When the steel plate buckles and the tension band has not yet been fully formed, the lateral stiffness of the structural column 1 will decrease significantly. At this time, the lateral stiffness of the SMA strand 5 plays a major role, so that the lateral stiffness of the structural column 1 will not suddenly decrease; then the tension band will be formed soon, and the lateral stiffness of the structural column 1 will recover.

[0056] (4) After the tension band is formed, under the reciprocating action of earthquake, the buckling energy dissipation of the embedded steel plate 3 and the yielding energy dissipation of the SMA strand 5 work together to provide a better energy dissipation capacity for the structural column 1 and reduce the seismic response of the structure.

[0057] (5) In the above stage, the horizontal force is inputted from one side to the structural column 1, causing the structural column 1 to deform. At this time, the SMA strand 5 will use the shape memory function of the material to form a reaction force to resist the horizontal action of the earthquake and prevent the structural column 1 from deforming. This is why the SMA strand 5 can provide lateral stiffness and energy dissipation capacity.

[0058] (6) After the earthquake, the structural column 1 will have a certain residual displacement. At this time, the SMA strands 5 will again use the shape memory function of the material to provide self-restoring force for the structural column 1, thereby achieving the self-reset of the structural column 1 after the earthquake.

[0059] In the present invention, since the SMA material has good durability, the SMA strands 5 can be reused in the post-earthquake repair process, and only the embedded steel plate 3 is replaced, so the later repair cost is also low. In addition, except for the SMA strands 5, the remaining components of the present invention are all steel products. Even if they are damaged, they can be replaced and re-smelted, thereby achieving recycling. This structure belongs to the category of green building structure.

[0060] Furthermore, the present invention utilizes oblique stiffening ribs to form SMA stranded wire grooves 4, thereby preventing out-of-plane buckling of the wall panel under strong earthquakes from interfering with the operation of the SMA stranded wires 5, and facilitating later maintenance.

[0061] Furthermore, at least one transverse stiffening rib 6 and / or vertical stiffening rib 7 is arranged on the embedded steel plate 3, and an edge stiffening rib 8 is also fixed to the edge of the embedded steel plate 3; two parallel edge stiffening ribs 8 are respectively fixed to the two I-beams 2 by bolts; one end of the SMA stranded wire 5 is respectively fixed to the edge stiffening ribs 8 arranged at the two ends of the SMA stranded wire groove 4.

[0062] In specific implementation, the transverse stiffening ribs 6 and the vertical stiffening ribs 7 are used to suppress the overall buckling of the wall panel, thereby improving the initial stiffness of the self-resetting assembled steel plate shear wall.

[0063] Example 2

[0064] The difference between this embodiment and Embodiment 1 is that the SMA stranded wire units are provided on both sides of the embedded steel plate 3, and the SMA stranded wire units located on one side of the embedded steel plate 3 and the SMA stranded wire units located on the other side of the embedded steel plate 3 are spatially crossed.

[0065] The SMA stranded wire grooves 4 are arranged on both sides of the embedded steel plate 3 to form cross stiffening ribs in disguise, further improving the lateral stiffness of the embedded steel plate 3, while allowing the SMA stranded wires 5 on both sides to be alternately pulled and compressed without interfering with each other.

[0066] Example 3

[0067] The difference between this embodiment and embodiment 2 is that: Figure 2 and Figure 3 As shown, the self-resetting assembled steel plate shear wall also includes a plurality of auxiliary connecting devices 9, a first side of the auxiliary connecting device 9 is bolted to the I-beam 2, and a second side of the auxiliary connecting device 9 is bolted to an edge stiffening rib 8 of the embedded steel plate 3; one end of the SMA strand 5 is also fixed to the second side of the auxiliary connecting device 9.

[0068] Due to the provision of the auxiliary connection device 9, the contact area between the polygonal embedded steel plate 3 and the I-beam 2 is wider, and the connection between the polygonal embedded steel plate 3 and the I-beam 2 is more reliable.

[0069] In a specific implementation, the auxiliary connection device 9 includes a triangular steel plate and a right-angled triangular frame formed by welding three steel plates, and the triangular steel plate is embedded in the right-angled triangular frame;

[0070] The auxiliary connection device 9 is connected to an obliquely arranged edge stiffening rib 8 by bolts through the hypotenuse steel plate of the right-angled triangle frame, and the obliquely arranged edge stiffening rib 8 is connected to an edge stiffening rib 8 of the embedded steel plate 3 by bolts;

[0071] The auxiliary connection devices 9 are all connected to the I-beam 2 with bolts through a right-angled steel plate on one side of the right-angled triangle frame;

[0072] One end of the SMA stranded wire 5 is also fixed to the hypotenuse steel plate of the right-angled triangle frame of the auxiliary connecting device 9 .

[0073] In further implementation, the size of the auxiliary connection device can be designed as required so that the four auxiliary connection devices 9 and the embedded steel plate 3 form a rectangle after being combined, thereby improving the rigidity of the shear wall.

[0074] In a specific implementation, the auxiliary connection device 9 can also be an angle steel structure, which is welded to two I-beams 2 , and then the stranded wire connection device is connected to the embedded steel plate 3 .

[0075] Example 4

[0076] The difference between this embodiment and embodiment 1 is that: Figure 4 As shown, more than three I-beams 2 are arranged in parallel between the two structural columns 1, and an embedded steel plate 3 is installed between any two adjacent I-beams 2. A group of parallel opposite sides of the embedded steel plate 3 are respectively fixed on the two I-beams 2 by bolts, and there is a spacing between the structural column 1 and the embedded steel plate 3.

[0077] Since the embedded steel plate 3 of the present invention is not connected to the column, the size, rigidity and layout of the steel plate can be freely adjusted, which is convenient for the reasonable realization of the building function. In addition, the self-resetting steel plate shear wall can be designed and arranged in multiple layers according to the design requirements of the structural lateral resistance capacity.

[0078] Among them, different polygonal embedded steel plates 3 can have different steel plate thicknesses or the same steel plate thickness. The thickness of the polygonal embedded steel plate 3 should be calculated and determined based on the preset lateral resistance capacity of the self-resetting prefabricated steel plate shear wall to achieve the purpose of reasonably controlling the lateral resistance stiffness of each floor.

[0079] Example 5

[0080] The present embodiment also provides a construction and installation method based on the aforementioned self-resetting assembled steel plate shear wall, which specifically includes the following steps: processing to form an I-beam 2, an embedded steel plate 3 and an auxiliary connection device 9; wherein the embedded steel plate 3 has at least one set of hexagonal embedded steel plates or octagonal embedded steel plates with parallel opposite sides; the auxiliary connection device 9 includes a triangular steel plate and a right-angled triangular frame formed by welding three steel plates, and the triangular steel plate is embedded in the right-angled triangular frame;

[0081] A plurality of bolt holes are provided on the flange of the I-beam 2;

[0082] Welding stiffening ribs on each edge of the embedded steel plate 3 to form edge stiffening ribs 8, and opening a plurality of bolt holes on all edge stiffening ribs 8 of the embedded steel plate 3;

[0083] A pair of parallel oblique stiffening ribs are welded on both sides of the embedded steel plate to form an SMA stranded wire groove 4, and SMA stranded wire connection holes are opened on the edge stiffening ribs 8 on the embedded steel plate corresponding to the two ends of the SMA stranded wire groove 4, and the SMA stranded wire connection holes correspond to the SMA stranded wire groove 4;

[0084] A plurality of bolt holes are provided on three steel plates of the right-angled triangle frame of the auxiliary connection device 9, and an SMA stranded wire connection hole is provided on the hypotenuse steel plate of the right-angled triangle frame;

[0085] After the above-mentioned I-beam 2, polygonal embedded steel plate 3 and auxiliary connecting device 9 are processed, they are transported to the site;

[0086] After the main structure is completed on site, at least two I-beams 2 are fixed to the structural columns 1 of the main structure;

[0087] Each auxiliary connection device 9 is bolted to an I-beam 2 through a right-angled steel plate of its right-angled triangle frame, and two auxiliary connection devices 9 are bolted to each I-beam 2;

[0088] Insert the embedded steel plate, bolt the two parallel edge stiffening ribs 8 of the embedded steel plate 3 to the two I-beams 2 respectively, and then bolt each auxiliary connection device 9 to one edge stiffening rib 8 of the embedded steel plate 3 through the hypotenuse steel plate of its right-angled triangle frame;

[0089] The SMA stranded wire 5 is installed in the SMA stranded wire groove 4 of the embedded steel plate, and the two ends of the SMA stranded wire 5 are respectively passed through the SMA stranded wire connection hole on the embedded steel plate and the SMA stranded wire connection hole on the auxiliary connection device 9, and a pre-tightening force is applied according to the design to straighten and fix the SMA stranded wire 5.

[0090] It should be noted that the self-righting steel plate shear wall should be installed after the main structure is completed, because the self-righting steel plate shear wall theoretically does not bear any vertical gravity load.

[0091] The pre-tensioning force required to be applied to the SMA stranded wire 5 during installation is relatively small, and the SMA stranded wire 5 only needs to be straightened and tightened. The structure is simple, the construction is convenient and quick, and the repair difficulty is relatively small.

[0092] Furthermore, during the process of forming the embedded steel plate, the thickness of the embedded steel plate is determined by calculation based on the lateral resistance capacity of the preset self-resetting assembled steel plate shear wall.

[0093] Furthermore, during the processing of the embedded steel plate, transverse stiffening ribs and longitudinal stiffening ribs can also be arranged on both sides of the embedded steel plate, wherein the number and thickness of the transverse stiffening ribs and longitudinal stiffening ribs are calculated and determined based on the preset self-resetting prefabricated steel plate shear wall bearing capacity.

[0094] Except for the SMA stranded wire 5, the other components of the present invention are all steel products. Even if they are damaged, they can be replaced and then returned to the furnace for refining, thereby achieving recycling. This structure belongs to the category of green building structure.

[0095] In the present invention, since the SMA material has good durability, the SMA strands 5 can be reused during the post-earthquake repair process, and only the embedded steel plate 3 is replaced, so the later repair cost is also low.

[0096] Specifically, when replacing the embedded steel plate, loosen all connecting bolts, remove the SMA strands 5 from the embedded steel plate, and remove the embedded steel plate from the I-beam 2 and the auxiliary connecting device 9; after the embedded steel plate is replaced, the embedded steel plate is fixedly connected to the I-beam 2 and the auxiliary connecting device 9 through connecting bolts, and the SMA strands 5 are reinstalled on the embedded steel plate as required.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A self-resetting assembled steel plate shear wall based on SMA, characterized by: The invention comprises two structural columns, at least two I-beams are arranged in parallel between the two structural columns, an embedded steel plate having at least one set of parallel opposite sides is installed between any two adjacent I-beams, a set of parallel opposite sides of the embedded steel plate is respectively fixed on the two I-beams by bolts, and there is a distance between the structural columns and the embedded steel plate; wherein the embedded steel plate is a hexagonal embedded steel plate or an octagonal embedded steel plate having at least one set of parallel opposite sides; SMA stranded wire units are provided on both sides of the embedded steel plate, and the SMA stranded wire unit located on one side of the embedded steel plate is spatially crossed with the SMA stranded wire unit located on the other side of the embedded steel plate; the SMA stranded wire unit includes an SMA stranded wire groove and an SMA stranded wire, the SMA stranded wire groove includes two stiffening ribs arranged in parallel on the embedded steel plate, the SMA stranded wire is located in the SMA stranded wire groove, and the two ends are respectively fixed on the two edges of the embedded steel plate corresponding to the two ends of the SMA stranded wire groove.

2. The SMA-based self-resetting assembled steel plate shear wall according to claim 1 is characterized in that: At least one transverse stiffening rib and / or vertical stiffening rib is arranged on the embedded steel plate, and an edge stiffening rib is also fixedly installed on the edge of the embedded steel plate. Two parallel edge stiffening ribs are respectively fixedly installed on two I-beams by bolts, and one end of the SMA stranded wire is respectively fixedly installed on the edge stiffening ribs arranged at both ends of the SMA stranded wire groove.

3. The SMA-based self-resetting assembled steel plate shear wall according to claim 2 is characterized in that: It also includes multiple auxiliary connecting devices, the first side of the auxiliary connecting device is bolted to the I-beam, and the second side of the auxiliary connecting device is bolted to an edge stiffening rib of the embedded steel plate; one end of the SMA strand is also fixed to the second side of the auxiliary connecting device.

4. The SMA-based self-resetting assembled steel plate shear wall according to claim 3 is characterized in that: The auxiliary connection device comprises a triangular steel plate and a right-angled triangular frame formed by welding three steel plates, wherein the triangular steel plate is embedded in the right-angled triangular frame; A right-angled steel plate on one side of the right-angled triangle frame is bolted to the I-beam; The hypotenuse steel plate of the right-angled triangle frame is connected to an edge stiffening rib of the embedded steel plate with bolts; One end of the SMA stranded wire is also fixed on the hypotenuse steel plate of the right triangle frame.

5. A construction and installation method for a self-resetting assembled steel plate shear wall, characterized in that: The specific steps include: Processing to form an I-beam, an embedded steel plate and an auxiliary connection device, wherein the embedded steel plate has at least one set of hexagonal embedded steel plates or octagonal embedded steel plates with parallel opposite sides; the auxiliary connection device comprises a triangular steel plate and a right-angled triangular frame formed by welding three steel plates, and the triangular steel plate is embedded in the right-angled triangular frame; A plurality of bolt holes are provided on the flange of the I-beam; Welding stiffening ribs at each edge of the embedded steel plate to form edge stiffening ribs, and opening a plurality of bolt holes on all edge stiffening ribs of the embedded steel plate; A pair of parallel stiffening ribs are welded on both sides of the embedded steel plate to form an SMA stranded wire channel, and SMA stranded wire connection holes are opened on the edge stiffening ribs on the embedded steel plate corresponding to the two ends of the SMA stranded wire channel; A plurality of bolt holes are provided on the three side steel plates of the right-angled triangle frame of the auxiliary connection device, and an SMA stranded wire connection hole is provided on the hypotenuse steel plate of the right-angled triangle frame; After the above-mentioned I-beams, polygonal embedded steel plates and auxiliary connection devices are processed, they are transported to the site; After the main structure is completed on site, at least two I-beams are fixed to the structural columns of the main structure; Each auxiliary connection device is bolted to an I-beam through a right-angled steel plate of its right-angled triangle frame, and two auxiliary connection devices are bolted to each I-beam; Insert the embedded steel plate, connect the two parallel edge stiffening ribs of the embedded steel plate to the I-beam bolts respectively, and then connect each auxiliary connection device to one edge stiffening rib of the embedded steel plate through the hypotenuse steel plate of its right-angled triangle frame bolts; Install the SMA stranded wire in the SMA stranded wire groove of the embedded steel plate, and pass the two ends of the SMA stranded wire through the SMA stranded wire connection hole on the embedded steel plate and the SMA stranded wire connection hole on the auxiliary connection device respectively, and apply pre-tightening force according to the design to straighten and fix the SMA stranded wire.

6. The construction and installation method according to claim 5, characterized in that: During the processing and forming process of the embedded steel plate, the thickness of the embedded steel plate is determined by calculation based on the lateral resistance capacity of the preset self-resetting assembled steel plate shear wall.

7. The construction and installation method according to claim 5, characterized in that: During the processing of the embedded steel plate, transverse stiffening ribs and longitudinal stiffening ribs are arranged on both sides of the embedded steel plate, wherein the number and thickness of the transverse stiffening ribs and longitudinal stiffening ribs are calculated and determined based on the preset bearing capacity of the self-resetting assembled steel plate shear wall.

8. The construction and installation method according to claim 5, characterized in that ； When replacing the embedded steel plate, loosen all the connecting bolts, remove the SMA strands from the embedded steel plate, and remove the embedded steel plate from the I-beam and the auxiliary connecting device; after the embedded steel plate is replaced, fix the embedded steel plate to the I-beam and the auxiliary connecting device with the connecting bolts, and reinstall the SMA strands on the embedded steel plate as required.

Images