A replaceable energy-dissipating connection device for self-resetting shear walls

Abstract

The present invention provides a replaceable energy-absorbing connection device for a self-resetting shear wall, comprising an energy-absorbing connection piece and prestressed tendons, wherein the energy-absorbing connection piece is symmetrically arranged at the bottom corners of both ends of a prefabricated wall panel; the energy-absorbing connection piece comprises a connection box and two U-shaped energy-absorbing plates; the upper end of the connection box is connected to the upper shear wall, and the lower end is flush with the bottom end of the upper shear wall; the two U-shaped energy-absorbing plates are symmetrically arranged on both sides of the connection box, one end of the U-shaped energy-absorbing plate is fixedly connected to the connection box, and the other end is connected to the lower shear wall; the prestressed tendons are arranged on the central axis of the prefabricated wall panel, and the upper shear wall and the lower shear wall are connected into a whole through the prestressed tendons; the present invention realizes the self-resetting function of the wall under the action of prestress and the gravity of the wall body when the energy-absorbing connection piece and the prestressed tendons are coordinated with each other; the energy consumption is concentrated on the U-shaped energy-absorbing plates, a large amount of earthquake energy is consumed, and crushing damage to the corner of the wall body and damage to the main structure are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of earthquake resistance and shock absorption in civil engineering, and in particular relates to a replaceable energy-dissipating connection device for a self-resetting shear wall. Background Art

[0002] Earthquakes cause serious damage to the safety of human society and property. They not only destroy existing buildings, but also cause serious direct economic losses and even temporarily interrupt economic activities. For economically developed countries and regions, the indirect economic losses of earthquake disasters often exceed the direct economic losses. According to the seismic design principle of "no damage in small earthquakes, repairable in medium earthquakes, and no collapse in large earthquakes", when medium or large earthquakes occur, the components dissipate most of the energy transmitted by the earthquake through plastic deformation, thereby ensuring the safety of the main structure. This design method can protect the lives of people in large earthquakes, but the structure is severely damaged after the earthquake and cannot be repaired or used again. It can only be demolished and rebuilt, causing immeasurable losses to economic activities such as production and life.

[0003] In the recoverable functional structure, the prestressed tendons are passed through from top to bottom and fixed with anchors after tensioning to enable them to have self-reset capability. At present, the energy dissipation method commonly used in recoverable shear walls is to bury unbonded steel bars inside the wall. The unbonded steel bars can resist lateral displacement and dissipate energy, thereby achieving good self-reset capability. However, during the stress process of the wall, the concrete at the corners is subjected to hard collisions and is prone to crushing and spalling. Once the unbonded steel bars are damaged, they are not easy to replace, which increases the repair cost. Summary of the invention

[0004] In view of the technical problems existing in the prior art, the present invention provides a replaceable energy-absorbing connection device for a self-resetting shear wall, so as to solve the technical problem that the concrete at the corner of the existing restorable shear wall is easily crushed and peeled off under pressure.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The invention provides a replaceable energy-absorbing connection device for a self-resetting shear wall, comprising an energy-absorbing connection piece and prestressed tendons, wherein the energy-absorbing connection piece is symmetrically arranged at the bottom corners of both ends of a prefabricated wall panel; the energy-absorbing connection piece comprises a connection box and two U-shaped energy-absorbing plates; the upper end of the connection box is connected to the upper shear wall, and the lower end is flush with the bottom end of the upper shear wall; the two U-shaped energy-absorbing plates are symmetrically arranged on both sides of the connection box, one end of the U-shaped energy-absorbing plate is detachably fixedly connected to the connection box, and the other end is detachably fixedly connected to the lower shear wall; the prestressed tendons are arranged through the central axis of the prefabricated wall panel, and the upper shear wall and the lower shear wall are connected into a whole through the prestressed tendons.

[0007] Furthermore, the connection box includes a cover plate, an outer flange plate, an inner flange plate and an intermediate web plate; the cover plate is horizontally fixed in the prefabricated wall panel, and the outer flange plate and the inner flange plate are vertically and parallelly arranged at the two ends below the cover plate; the outer flange plate is flush with the end of the prefabricated wall panel, and the inner flange plate is fixedly arranged in the prefabricated wall panel; the intermediate web plate is arranged between the outer flange plate and the inner flange plate, and the intermediate web plate is parallel to the prefabricated wall panel; two U-shaped energy absorption plates are symmetrically arranged on both sides of the intermediate web plate.

[0008] Furthermore, the connection box also includes longitudinal stiffening ribs and transverse stiffening ribs; the longitudinal stiffening ribs are vertically and parallelly arranged between the outer flange plate and the inner flange plate, and the longitudinal stiffening ribs are vertically fixedly connected to the middle web plate; a plurality of transverse stiffening ribs are arranged between the longitudinal stiffening ribs and the outer flange plate.

[0009] Furthermore, the U-shaped energy absorption panel includes an upper U-shaped section and a horizontal connecting section; the upper U-shaped section opens downward, and one end of the upper U-shaped section is detachably fixedly connected to the connecting box; the horizontal connecting section is fixedly arranged at the other end of the upper U-shaped section, the horizontal connecting section is flush with the bottom end of the prefabricated wall panel, and the horizontal connecting section is detachably fixedly connected to the lower shear wall.

[0010] Furthermore, the horizontal connection section is connected to the lower shear wall by using a pre-embedded anchor; the upper end of the pre-embedded anchor is detachably fixedly connected to the horizontal connection section, and the lower end of the pre-embedded anchor is pre-embedded in the lower shear wall.

[0011] Furthermore, the embedded anchor comprises an embedded plate, a threaded sleeve and an anchor steel bar; the embedded plate is horizontally embedded at the top of the lower shear wall, and the threaded sleeve is vertically fixed below the embedded plate; the anchor steel bar is vertically arranged in the lower shear wall, and the upper end of the anchor steel bar is fixedly inserted into the threaded sleeve; the embedded plate and the horizontal connecting section are connected by high-strength bolts, and the lower end of the high-strength bolt passes through the embedded plate and then extends into and is fixed in the threaded sleeve.

[0012] Furthermore, the energy dissipation connector also includes a guard plate structure, which is arranged between the prefabricated wall panel and the connection box; the guard plate structure includes a guard plate outer plate, a guard plate inner plate, a guard plate end plate, a guard plate bottom plate, a connecting anchor and a plurality of anchor bars;

[0013] The outer plate of the guard plate is arranged vertically parallel to the inner plate of the guard plate, the outer plate of the guard plate is flush with the outer surface of the prefabricated wall panel, and the inner plate of the guard plate is flush with the inner surface of the prefabricated wall panel; the outer plate of the guard plate and the inner plate of the guard plate are both L-shaped plates, the horizontal end of the L-shaped plate is fixedly connected to the cover plate, and the vertical end of the L-shaped plate is fixedly connected to the inner flange plate; a number of anchor bars are evenly arranged vertically on the outer plate of the guard plate and the inner plate of the guard plate, the lower end of the anchor bar is fixedly connected to the outer plate of the guard plate and the inner plate of the guard plate, and the upper end is overlapped and fixed with the distributed steel bars of the prefabricated wall panel;

[0014] The guard plate end plate is vertically arranged between the guard plate outer plate and the guard plate inner plate, and the guard plate end plate is flush with the end of the prefabricated wall panel; the guard plate bottom plate is horizontally arranged between the guard plate outer plate and the guard plate inner plate, and the guard plate bottom plate is flush with the bottom end of the prefabricated wall panel; the connecting anchor nails are horizontally penetrated in the prefabricated wall panel, one end of the connecting anchor nails is fixedly connected to the guard plate outer plate, and the other end is fixedly connected to the guard plate outer plate.

[0015] Furthermore, the connection between the horizontal end and the vertical end of the L-shaped plate is rounded.

[0016] Furthermore, it also includes shear studs, which are symmetrically arranged on both sides of the prestressed tendons, with the upper ends of the shear studs connected to the upper shear wall and the lower ends connected to the lower shear wall.

[0017] Furthermore, the shear bolt includes a shear sleeve and a shear steel rod. The shear sleeve is arranged at the bottom end of the upper shear wall. The upper end of the shear steel rod is inserted into the shear sleeve, and the lower end is buried in the top of the lower shear wall.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides a replaceable energy-absorbing connection device for a self-resetting shear wall, wherein the upper and lower prefabricated wall panels are connected into a whole through energy-absorbing connection pieces and prestressed tendons, and the prefabricated wall panels are swayed and deformed in coordination under the action of an earthquake; the prestressed tendons are arranged on the central axis of the prefabricated wall panels, and the swaying of the wall is controlled by using prestress and the deadweight of the wall; by arranging energy-absorbing connection pieces at the bottom corners of the prefabricated wall panels, the prefabricated wall panels will sway around one corner of the wall under the action of an earthquake, and the corner of the wall on the other side will be lifted; when the corner of the wall sways, the U-shaped energy-absorbing plate and the connection box move relative to each other, and the swaying amplitude increases This will cause the U-shaped energy absorbing plate to partially enter plastic deformation, thereby exerting an energy absorbing function; when the earthquake effect decreases, the prefabricated wall panel returns to the initial position through its own gravity and the tension of the prestressed tendons, thereby realizing a self-resetting function; after the earthquake, the energy absorbing connection device is replaced and repaired by replacing the U-shaped energy absorbing plate; the present invention protects the main structure from less damage or even no damage through the damage energy consumption of the U-shaped energy absorbing plate, avoids brittle crushing damage at the corners of the wall concrete, expands the earthquake level range applicable to the structure, protects the main structure from damage, and has excellent structural performance.

[0020] Furthermore, the connection box is formed into an I-shaped structure by splicing a cover plate, inner and outer flange plates and a web plate, thereby realizing the connection between the U-shaped energy absorption panel and the prefabricated wall panel. The connection box provides lateral stiffness to ensure that the U-shaped panel can play its energy absorption function. The connection box is embedded in the prefabricated wall panel without affecting the layout and decoration of the wall panel.

[0021] Furthermore, by arranging longitudinal stiffening ribs between the outer flange plate and the inner flange plate, and arranging transverse stiffening ribs between the outer flange plate and the longitudinal stiffening ribs, when the wall sways under the action of an earthquake, the outer flange plate is subjected to greater pressure, and the reinforcement effect of the stiffening ribs can avoid out-of-plane buckling of the outer flange, thereby improving the inherent strength of the energy-absorbing connector; at the same time, the U-shaped energy-absorbing plate is arranged in the space surrounded by the web, the inner flange and the longitudinal stiffening ribs, which can facilitate the replacement of the energy-absorbing device and does not occupy the building space for convenient decoration.

[0022] Furthermore, under the action of an earthquake, the wall sways. When the height of one side of the wall rises, one end of the U-shaped energy absorbing plate rises with the lifting of the wall, and the U-shaped energy absorbing plate gradually bends and deforms to consume energy. When the height of one side of the wall drops, the U-shaped energy absorbing plate gradually deforms and continues to consume energy. Unlike buckling energy dissipation and shear energy dissipation, which require a longer steel member to prevent fracture, the U-shaped energy dissipation plate dissipates energy by bending, has no strict requirements on height, and is not prone to fracture and damage. Preferably, the U-shaped energy dissipation plate is cut and bent by steel plate or cut by steel block, which effectively increases the integrity of the U-shaped energy dissipation plate and avoids fracture of the upper U-shaped end and the horizontal connecting section, which causes failure of the energy dissipation component.

[0023] Furthermore, the U-shaped energy absorbing plate is connected to the lower shear wall by using embedded anchors. The embedded anchors and the U-shaped energy absorbing plate are connected by high-strength bolts. The U-shaped energy absorbing plate can not only be installed and replaced more conveniently in a smaller space, but also can ensure that the U-shaped energy absorbing plate is firmly connected to the lower shear wall.

[0024] Furthermore, by providing a guard plate structure at the contact point between the connection box and the concrete, the crushing damage of the connection between the prefabricated wall panel and the connection box due to the sudden change of stiffness is avoided, the compressive strength of the concrete is improved, and the concrete is prevented from being crushed or the protective layer from falling off; the L-shaped guard plates are connected by connecting anchors. After the concrete is poured, the connecting anchors strengthen the connection between the guard plate structure and the concrete, and the connection box is prevented from being separated from the concrete due to excessive force during the swinging process.

[0025] Furthermore, the connection between the horizontal end and the vertical end of the L-shaped plate is rounded to avoid stress concentration at the contact point between the inner corner of the guard plate structure and the prefabricated wall panel.

[0026] Furthermore, by arranging shear studs on both sides of the prestressed tendons, the shear studs are utilized to effectively share the horizontal shear force at the joints, thereby improving the shear bearing capacity of the wall.

[0027] Furthermore, a shear stud is formed by combining a shear sleeve and a shear steel bar. The shear sleeve is pre-buried in the upper wall. The shear steel bar prevents the lateral movement of the wall through the shear sleeve, avoiding direct contact between the shear steel bar and the concrete, which may cause the concrete to be crushed. The shear steel bar mainly bears the shear force, and the U-shaped energy dissipation plate mainly bears the bending moment. The force at the bottom of the wall is clear, which facilitates the design and calculation of the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view of the replaceable energy-consuming connection device of the present invention;

[0029] Figure 2 It is a side view of the replaceable energy-consuming connection device of the present invention;

[0030] Figure 3 A top view of the replaceable energy-consuming connection device of the present invention;

[0031] Figure 4 It is a schematic diagram of the structure of the U-shaped energy-consuming plate in the energy-changing connection device described in the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the embedded anchor piece in the replaceable energy-consuming connection device of the present invention;

[0033] Figure 6 It is a schematic diagram of the assembly structure of the replaceable energy-consuming connecting device described in the present invention.

[0034] Among them, 1 energy-absorbing connector, 2 prestressed tendons, 3 shear studs, 4 upper shear wall, 5 lower shear wall; 11 connection box, 12 U-type energy-absorbing plate, 13 guard plate structure, 14 embedded anchor; 31 shear sleeve, 32 shear steel bar; 111 cover plate, 112 outer flange plate, 113 inner flange plate, 114 middle web plate, 115 longitudinal stiffening rib, 116 transverse stiffening rib; 121 upper U-shaped section, 122 horizontal connection section, 123 first bolt hole, 124 second bolt hole; 131 guard plate outer plate, 132 guard plate inner plate, 133 guard plate end plate, 134 guard plate bottom plate, 135 connecting anchor, 136 anchor bar; 141 embedded plate, 142 threaded sleeve, 143 anchor steel bar; 31 shear sleeve, 32 shear steel bar. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] As attached Figure 1-6As shown, the present invention provides a replaceable energy-absorbing connection device for a self-resetting shear wall, comprising an energy-absorbing connection member 1, a prestressed tendon 2 and a shear-resistant stud 3; the energy-absorbing connection member 1 is symmetrically arranged at the bottom corners of both ends of the prefabricated wall panel, the upper end of the energy-absorbing connection member 1 is connected to the upper shear wall 4, and the lower end is connected to the lower shear wall 5; the prestressed tendon 2 is arranged on the central axis of the prefabricated wall panel, and the prestressed tendon 2 passes through the upper shear wall 4 and the lower shear wall 5, and the upper shear wall 4 is connected to the lower shear wall 5 by the prestressed tendon 2. As a whole, the energy-absorbing connector 1 is arranged at the tension-compression corner of the prefabricated wall panel, and the energy-absorbing connector 1 and the prestressed tendons 2 are jointly stressed and deformed in a coordinated manner, thereby avoiding compression and crushing of the wall structure; wherein, the energy-absorbing connector 1 provides energy-absorbing capacity, and the prestressed tendons 2 provide self-resetting capacity. When the two are coordinated with each other, under the action of prestress and the wall's own gravity, when the wall returns to its initial position, there is only little or even no residual deformation, and at the same time, the energy consumption is concentrated on the U-shaped energy-absorbing plate, consuming a large amount of earthquake energy, thereby avoiding damage to the main structure.

[0037] The shear studs 3 are symmetrically arranged on both sides of the prestressed tendons 2, and the shear studs 3 are placed at the horizontal joints between the upper shear wall 4 and the lower shear wall 5; the upper ends of the shear studs 3 are connected to the upper shear wall 4, and the lower ends are connected to the lower shear wall 5; by arranging the shear studs 3 between the upper and lower shear walls, the horizontal shear force at the horizontal joints is shared, the prestressed tendons 2 are prevented from being sheared when subjected to excessive force, and shear failure of the wall is avoided.

[0038] The energy-absorbing connector 1 includes a connection box 11, two U-shaped energy-absorbing plates 12, a guard plate structure 13 and a pre-embedded anchor 14. The upper end of the connection box 11 is connected to the upper shear wall 4 through the guard plate structure 13, and the lower end of the connection box 11 is flush with the bottom end of the upper shear wall 4; the two U-shaped energy-absorbing plates 12 are symmetrically arranged on both sides of the connection box 11, and the two U-shaped energy-absorbing plates 12 are symmetrically arranged along the thickness plane of the prefabricated wall panel; one end of the U-shaped energy-absorbing plate 12 is connected to the connection box 11, and the other end is fixedly connected to the lower shear wall 5 through the pre-embedded anchor 14.

[0039] The connection box 11 includes a cover plate 111, an outer flange plate 112, an inner flange plate 113, an intermediate web plate 114, a longitudinal stiffening rib 115 and a transverse stiffening rib 116. The cover plate 111 is fixed horizontally in the prefabricated wall panel, and the outer flange plate 112 and the inner flange plate 113 are vertically and parallelly arranged at the two ends below the cover plate 111; the outer flange plate 112 is flush with the end of the prefabricated wall panel, and the inner flange plate 113 is fixedly arranged in the prefabricated wall panel; the intermediate web plate 114 is arranged between the outer flange plate 112 and the inner flange plate 113, and the intermediate web plate 114 is parallel to the prefabricated wall panel and is located on the thickness center line of the prefabricated wall panel; the upper ends of the outer flange plate 112, the inner flange plate 113 and the intermediate web plate 114 are connected to the cover plate 111. 11 is fixedly connected; the longitudinal stiffening ribs 115 are vertically and parallelly arranged between the outer flange plate 112 and the inner flange plate 113, and the upper ends of the longitudinal stiffening ribs 115 are fixedly connected to the cover plate 111; transverse stiffening ribs 116 are evenly arranged between the longitudinal stiffening ribs 115 and the outer flange plate 112, one end of the transverse stiffening ribs 116 is fixedly connected to the outer flange plate 112, and the other end is fixedly connected to the longitudinal stiffening ribs 115; the middle web 114 is perpendicular to the longitudinal stiffening ribs 115, the cover plate 111 and the inner flange plate 113, and the connection box is symmetrical about the central axis in the thickness direction of the prefabricated wall, providing sufficient rigidity for resisting lateral forces; the connection box 11 and the guard plate structure 13 are connected by welding to form a steel foot connector.

[0040] Two U-shaped energy absorbing plates 12 are symmetrically arranged on both sides of the middle web 114, one end of the U-shaped energy absorbing plate 12 is fixedly connected to the longitudinal stiffening rib 115, and the other end is fixedly connected to the lower shear wall 5; the U-shaped energy absorbing plate 12 includes an upper U-shaped section 121 and a horizontal connecting section 122; the upper U-shaped section 121 opens downward, and one end of the upper U-shaped section 121 is fixedly connected to the longitudinal stiffening rib 115 by a first bolt; the upper U-shaped section 121 is provided with a first bolt hole 123, and the first bolt hole 123 is arranged on the connecting section between the upper U-shaped section 121 and the longitudinal stiffening rib 115, and the longitudinal stiffening rib 115 is provided with a bolt fixing hole, and the first bolt hole 123 is arranged corresponding to the bolt fixing hole, and the first bolt passes through the first bolt hole 123 and the bolt fixing hole in sequence to fix the upper U-shaped section 121 and the longitudinal stiffening rib 115 together.

[0041] The horizontal connecting section 122 is horizontally fixed to the other end of the upper U-shaped section 121, and the horizontal connecting section 122 is fixedly connected to the embedded anchor 14 through a second bolt; the embedded anchor 14 is embedded in the top of the lower shear wall 5; the embedded anchor 14 includes an embedded plate 141, a threaded sleeve 142 and an anchoring steel bar 143; the embedded plate 141 is fixedly arranged at the top of the lower shear wall 5, the threaded sleeve 142 is vertically fixed below the embedded plate 141, the anchoring steel bar 143 is longitudinally arranged in the lower shear wall 5, the upper end of the anchoring steel bar 143 is fixedly penetrated in the threaded sleeve 142, and the anchoring steel bar 143 and the threaded sleeve 142 are connected by threads; the horizontal connecting section 122 is fixedly connected to the upper end of the upper U-shaped section 121, and the anchoring steel bar 143 and the threaded sleeve 142 are connected by threads; A second bolt hole 124 is provided on the connecting section 122, and a bolt through hole is provided on the embedded plate 141. The second bolt hole 124, the bolt through hole and the threaded sleeve 142 are centrally arranged. The lower end of the second bolt successively penetrates the second bolt hole 124 and the bolt through hole and then extends into the threaded sleeve 142. The horizontal connecting section 122, the embedded plate 141 and the threaded sleeve 142 are fixedly connected together by the second bolt; a thread matching the threaded sleeve is provided on the top of the anchor steel bar 143, and a firm connection is achieved by tightening, thereby realizing reliable stress transfer between the upper and lower shear walls; preferably, the connecting box and the guard plate structure adopt one or more of Q345 steel and Q420 steel.

[0042] Bolt holes are arranged in the middle and lower parts of the contact between the upper U-shaped section and the longitudinal stiffening rib in the U-shaped energy absorption plate, and corresponding bolt holes are also arranged at the corresponding positions of the longitudinal stiffening ribs, and the two are connected by bolts; an elliptical connecting bolt hole is arranged in the middle of the horizontal connecting section, which is connected as a whole with the embedded sleeve of the lower shear wall through connecting bolts; the U-shaped energy absorption plate is located on both sides of the middle web; preferably, the U-shaped energy absorption plate adopts Q235 low yield steel, which deforms under the action of earthquake to achieve energy absorption.

[0043] The guard plate structure 13 includes a guard plate outer plate 131, a guard plate inner plate 132, a guard plate end plate 133, a guard plate bottom plate 134, a connecting anchor 135 and a plurality of anchor bars 136; the guard plate outer plate 131 and the guard plate inner plate 132 are vertically parallel, the guard plate outer plate 131 is flush with the outer surface of the prefabricated wall panel, and the guard plate inner plate 132 is flush with the inner surface of the prefabricated wall panel; the guard plate outer plate 131 and the guard plate inner plate 132 are both L-shaped plates, the horizontal end of the L-shaped plate is fixedly connected to the cover plate 111, and the vertical end of the L-shaped plate is fixedly connected to the inner flange plate 113; preferably, in order to avoid Stress concentration occurs at the contact point between the guard plate-free structure and the prefabricated wall panel. The connection between the horizontal end and the vertical end of the L-shaped plate adopts a rounded corner setting, and the rounded corner structure is set close to the side of the prefabricated wall. A number of anchor bars 136 are evenly arranged vertically on the outer plate 131 and the inner plate 132 of the guard plate. The lower end of the anchor bar 136 is welded and fixed to the outer plate 131 and the inner plate 132 of the guard plate, and the upper end is overlapped and fixed to the distributed steel bars of the prefabricated wall panel. The outer plate and the inner plate of the guard plate in the guard plate structure are respectively arranged along the thickness direction of the prefabricated wall panel to form an L-shaped internal protective steel sleeve for protecting the concrete.

[0044] The guard plate end plate 133 is vertically arranged between the guard plate outer plate 131 and the guard plate inner plate 132, and the guard plate end plate 133 is flush with the end of the prefabricated wall panel; the two ends of the guard plate end plate 133 are respectively fixedly connected to the guard plate outer plate 131 and the guard plate inner plate 132, and the bottom of the guard plate end plate 133 is fixedly connected to the cover plate 111; the guard plate bottom plate 134 is horizontally arranged between the guard plate outer plate 131 and the guard plate inner plate 132, and the guard plate bottom plate 134 is flush with the bottom end of the prefabricated wall panel; the two ends of the guard plate bottom plate 134 are respectively fixedly connected to the guard plate outer plate 131 and the guard plate inner plate 1 32 is fixedly connected, and the side of the guard plate bottom plate 134 is fixedly connected to the inner flange plate 113; the connecting anchor 135 is horizontally penetrated in the prefabricated wall panel, one end of the connecting anchor 135 is fixedly connected to the guard plate outer plate 131, and the other end is fixedly connected to the guard plate inner plate 132; the connecting anchor 135 is arranged throughout the length, and the two ends of the connecting anchor 135 are respectively welded and fixed to the guard plate outer plate 131 and the guard plate inner plate 132; the guard plate structure 13 is provided with a double structural measure of the connecting anchor 135 and the anchor 136 to ensure the reliable connection between the guard plate structure and the prefabricated wall.

[0045] The cover plate 111, the outer flange plate 112, the inner flange plate 113, the middle web plate 114, the longitudinal stiffening ribs 115 and the transverse stiffening ribs 116 in the connection box 11 are fixed by welding or integrally formed, and the connection box 11 and the guard plate structure 13 are fixed by welding or integrally formed.

[0046] The prestressed tendon 2 includes two anchors and prestressed steel bars. The two anchors are respectively arranged at the upper and lower ends of the prestressed steel bars. The prestressed steel bars are longitudinally arranged on the central axis of the prefabricated wall panel. Prestressed tendon channels are arranged at the central axis of the upper shear wall 4 and the lower shear wall 5, and the prestressed steel bars are arranged through the prestressed tendon channels.

[0047] The shear studs 3 are symmetrically arranged on both sides of the prestressed tendons 2, the upper ends of the shear studs 3 are connected to the upper shear wall 4, and the lower ends are connected to the lower shear wall 5. The shear studs 3 include a shear sleeve 31 and a shear steel bar 32, the shear sleeve 31 is arranged at the bottom end of the upper shear wall 4, the upper end of the shear steel bar 32 is inserted into the shear sleeve 31, and the lower end is buried in the top of the lower shear wall 5; preferably, the shear sleeve adopts a PVC sleeve;

[0048] The replaceable energy dissipation connection device for a self-resetting shear wall described in the present invention specifically comprises the following steps in its assembly process:

[0049] Step 1: Processing of connection box, U-shaped energy dissipation plate and guard plate structure

[0050] First, the outer flange plate, inner flange plate and web plate are welded into an H-shaped or I-shaped structure, and then the cut transverse stiffening ribs and longitudinal stiffening ribs are welded and fixed on one side of the outer flange plate, and then the cover plate is welded to form a connection box;

[0051] The outer plate of the guard plate, the inner plate of the guard plate, the end plate of the guard plate and the bottom plate of the guard plate are welded and fixed together, and the two ends of the connecting bolts are respectively welded and fixed to the outer plate of the guard plate and the inner plate of the guard plate to form a guard plate structure; the processed guard plate structure is welded and fixed to the connection box together; the U-shaped energy absorption plate is formed by cutting and bending steel plates or cutting steel blocks, and the U-shaped energy absorption plate is symmetrically arranged in the connection box to form an energy absorption connection piece.

[0052] Step 2: Fabrication of prefabricated shear walls

[0053] For the upper shear wall, first assemble the special steel formwork, put the processed steel skeleton and distribution steel bars into the formwork, and tie the distribution steel bars to the steel skeleton; put the energy-absorbing connector at the corner of the steel formwork, and firmly tie the anchor bars in the energy-absorbing connector to the wall distribution steel bars; fix the embedded anchors to the bottom of the steel formwork, and bury the shear steel bars at the top of the steel formwork. Pour C40 fine stone concrete while vibrating, then level and plaster, and perform standard maintenance. When the strength reaches the requirements, remove the formwork to form the upper shear wall; the production of the lower shear wall is roughly the same as that of the upper shear wall, except that the embedded anchors are placed at the top connection of the prefabricated wall panels.

[0054] Step 3: Horizontal seam connection of upper and lower shear walls

[0055] When the concrete strength of the prefabricated wall panel reaches 75% of the design value, the formwork is removed, hoisted, positioned and installed. When hoisting the upper shear wall, a 20mm thick high-strength non-shrinkage mortar is laid on the top of the lower shear wall. The second bolt hole of the U-shaped energy absorption plate is aligned with the bolt through hole on the embedded plate, and the bolts are passed through the bolt holes of both to be tightened and fixed. The threaded sleeve of the lower prefabricated wall panel is aligned with the second bolt hole, and the bolts are inserted into the bolt holes and tightened to fix.

[0056] Step 4: Tensioning prestressed tendons

[0057] The prestressed steel bars are passed through the holes left in the middle of the upper and lower walls. The bottom of the prestressed steel bars are fixed by anchors. The upper protruding ends of the prestressed steel bars are tensioned to the designed strength by jacks, and the tensioning length of the prestressed steel bars is fixed by anchors.

[0058] The replaceable energy-absorbing connection device for self-resetting shear walls described in the present invention is that when an earthquake occurs, the upper shear wall will swing around one corner due to the earthquake, and the other corner will rise; the U-shaped energy-absorbing plate and the connection box will move on the side of the bolt connection, and the increase in the swing amplitude will cause the U-shaped energy-absorbing plate to partially enter plasticity, thereby achieving the energy-absorbing function. When the earthquake effect decreases, the upper shear wall returns to the initial position through its own gravity and the tension of the prestressed tendons, thereby achieving the self-resetting function; after a major earthquake, the U-shaped energy-absorbing plate is severely deformed and can be easily replaced; through the damage energy consumption of the U-shaped energy-absorbing plate, the main structure is protected from less damage or even no damage; the assembled shear wall and the energy-absorbing connector determine their respective geometric dimensions according to the actual needs of the project.

[0059] The replaceable energy-absorbing connection device for a self-resetting shear wall described in the present invention is a self-resetting shear wall based on a U-shaped energy-absorbing plate. It can realize efficient energy consumption while realizing the self-resetting swing of the wall, and the U-shaped energy-absorbing plate is easy to replace after yielding and failure. By setting the connection box, the compressive bearing capacity of the corner is effectively improved and the damage of concrete is reduced; by setting the guard plate structure, the strength of the internal concrete is improved and the damage of concrete is reduced; the corner of the guard plate structure is set to an arc shape to avoid stress concentration in the concrete at the contact part; the energy dissipation connection device is connected with the upper shear wall by setting the top anchor bar anchor connection and the anchor nails in the protection guard plate structure, and the embedded anchors of the U-shaped energy dissipation plate and the lower shear wall ensure the realization of the energy dissipation mechanism and the reliable force transmission between the upper and lower prefabricated walls; the U-shaped energy dissipation plate is set in the connection box to avoid occupying the building space; by setting the shear bolts between the upper shear wall and the lower shear wall, the horizontal shear force at the joint is shared to improve the shear bearing capacity of the wall; the replaceable energy dissipation connection device described in the present invention is preferably suitable for seismic shock absorption of shear walls of medium and low-rise structures.

[0060] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. A replaceable energy-dissipating connection device for a self-resetting shear wall, characterized in that: The energy-absorbing connector (1) comprises an energy-absorbing connector (1) and a prestressed tendon (2), wherein the energy-absorbing connector (1) is symmetrically arranged at the bottom corners of both ends of the prefabricated wall panel; the energy-absorbing connector (1) comprises a connection box (11) and two U-shaped energy-absorbing plates (12); the upper end of the connection box (11) is connected to the upper shear wall (4), and the lower end is flush with the bottom end of the upper shear wall (4); the two U-shaped energy-absorbing plates (12) are symmetrically arranged on both sides of the connection box (11), one end of the U-shaped energy-absorbing plate (12) is detachably fixedly connected to the connection box (11), and the other end is detachably fixedly connected to the lower shear wall (5); the prestressed tendon (2) is arranged through the central axis of the prefabricated wall panel, and the upper shear wall (4) and the lower shear wall (5) are connected into a whole through the prestressed tendon (2); The connection box (11) comprises a cover plate (111), an outer flange plate (112), an inner flange plate (113) and an intermediate web plate (114); the cover plate (111) is fixed horizontally in the prefabricated wall panel, and the outer flange plate (112) and the inner flange plate (113) are arranged vertically and in parallel at two ends below the cover plate (111); the outer flange plate (112) is flush with the end of the prefabricated wall panel, and the inner flange plate (113) is fixedly arranged in the prefabricated wall panel; the intermediate web plate (114) is arranged between the outer flange plate (112) and the inner flange plate (113), and the intermediate web plate (114) is parallel to the prefabricated wall panel; and two U-shaped energy dissipation plates (12) are symmetrically arranged on both sides of the intermediate web plate (114); The connection box (11) further comprises longitudinal stiffening ribs (115) and transverse stiffening ribs (116); the longitudinal stiffening ribs (115) are arranged vertically and parallelly between the outer flange plate (112) and the inner flange plate (113), and the longitudinal stiffening ribs (115) are vertically fixedly connected to the middle web plate (114); a plurality of transverse stiffening ribs (116) are arranged between the longitudinal stiffening ribs (115) and the outer flange plate (112); The U-shaped energy dissipation plate (12) comprises an upper U-shaped section (121) and a horizontal connection section (122); the upper U-shaped section (121) opens downward, and one end of the upper U-shaped section (121) is detachably fixedly connected to the connection box (11); the horizontal connection section (122) is fixedly arranged at the other end of the upper U-shaped section (121), the horizontal connection section (122) is flush with the bottom end of the prefabricated wall panel, and the horizontal connection section (122) is detachably fixedly connected to the lower shear wall (5).

2. A replaceable energy dissipation connection device for a self-resetting shear wall according to claim 1, characterized in that: The horizontal connection section (122) and the lower shear wall (5) are connected by means of a pre-embedded anchor piece (14); the upper end of the pre-embedded anchor piece (14) is detachably fixedly connected to the horizontal connection section (122), and the lower end of the pre-embedded anchor piece (14) is pre-embedded in the lower shear wall (5).

3. A replaceable energy dissipation connection device for a self-resetting shear wall according to claim 2, characterized in that: The embedded anchor (14) comprises an embedded plate (141), a threaded sleeve (142) and an anchoring steel bar (143); the embedded plate (141) is horizontally embedded at the top of the lower shear wall (5), and the threaded sleeve (142) is vertically fixed below the embedded plate (141); the anchoring steel bar (143) is vertically arranged in the lower shear wall (5), and the upper end of the anchoring steel bar (143) is fixedly inserted into the threaded sleeve (142); the embedded plate (141) and the horizontal connecting section (122) are connected by high-strength bolts, and the lower end of the high-strength bolt passes through the embedded plate (141) and then extends into the threaded sleeve (142) and is fixed therein.

4. A replaceable energy dissipation connection device for a self-resetting shear wall according to claim 1, characterized in that: The energy dissipation connection member (1) further comprises a guard plate structure (13), the guard plate structure (13) being arranged between the prefabricated wall panel and the connection box (11); the guard plate structure (13) comprising a guard plate outer plate (131), a guard plate inner plate (132), a guard plate end plate (133), a guard plate bottom plate (134), connecting anchor nails (135) and a plurality of anchor bars (136); The outer plate (131) of the guard plate is vertically arranged in parallel with the inner plate (132) of the guard plate. The outer plate (131) of the guard plate is flush with the outer surface of the prefabricated wall panel, and the inner plate (132) of the guard plate is flush with the inner surface of the prefabricated wall panel. The outer plate (131) of the guard plate and the inner plate (132) of the guard plate are both L-shaped plates. The horizontal end of the L-shaped plate is fixedly connected to the cover plate (111), and the vertical end of the L-shaped plate is fixedly connected to the inner flange plate (113). A plurality of anchor bars (136) are vertically evenly arranged on the outer plate (131) of the guard plate and the inner plate (132). The lower end of the anchor bar (136) is fixedly connected to the outer plate (131) of the guard plate and the inner plate (132), and the upper end is overlapped and fixed to the distributed steel bars of the prefabricated wall panel. The guard plate end plate (133) is vertically arranged between the guard plate outer plate (131) and the guard plate inner plate (132), and the guard plate end plate (133) is flush with the end of the prefabricated wall panel; the guard plate bottom plate (134) is horizontally arranged between the guard plate outer plate (131) and the guard plate inner plate (132), and the guard plate bottom plate (134) is flush with the bottom end of the prefabricated wall panel; the connecting anchor nail (135) is horizontally penetrated in the prefabricated wall panel, one end of the connecting anchor nail (135) is fixedly connected to the guard plate outer plate (131), and the other end is fixedly connected to the guard plate inner plate (132).

5. A replaceable energy dissipation connection device for a self-resetting shear wall according to claim 4, characterized in that: The connection between the horizontal end and the vertical end of the L-shaped plate is rounded.

6. A replaceable energy dissipation connection device for a self-resetting shear wall according to claim 1, characterized in that: It also includes shear studs (3) which are symmetrically arranged on both sides of the prestressed tendons (2), the upper ends of the shear studs (3) being connected to the upper shear wall (4) and the lower ends being connected to the lower shear wall (5).

7. A replaceable energy dissipation connection device for a self-resetting shear wall according to claim 6, characterized in that: The shear bolt (3) comprises a shear sleeve (31) and a shear steel rod (32). The shear sleeve (31) is arranged at the bottom end of the upper shear wall (4). The upper end of the shear steel rod (32) is inserted into the shear sleeve (31) and the lower end is buried in the top end of the lower shear wall (5).

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