Fabricated shear wall energy dissipation and vibration reduction joint connecting structure and construction method thereof

Abstract

The application provides an assembled shear wall energy dissipation and vibration reduction joint connecting structure and a construction method thereof. The joint connecting structure comprises a plurality of assembled shear walls. A vertical slit connecting node area in the shape of a Chinese character "yi" is formed between two left and right adjacent assembled shear walls. A horizontal slit connecting node area is formed between two upper and lower adjacent assembled shear walls. A corner L-shaped vertical slit connecting node area is formed between two vertically adjacent assembled shear walls. At least three groups of pre-buried connecting pieces are arranged between any two adjacent assembled shear walls. The pre-buried connecting pieces are installed at prefabricated notches on four edges of the assembled shear walls. A prefabricated floor slab is hoisted between the upper assembled shear wall and the lower assembled shear wall. The pre-buried connecting pieces of the application play the role of energy dissipation and vibration reduction while serving as connecting pieces. Most of the pre-buried connecting pieces are pre-buried in the wall body and coincide with the wall section, avoiding out-of-plane distortion of the energy dissipation device, preventing eccentric bending moments from being generated, and having better bearing capacity, stiffness and energy dissipation capacity.

Description

Technical Field

[0001] This invention relates to the field of precast shear wall technology, and in particular to a prefabricated shear wall energy dissipation and vibration reduction joint connection structure and its construction method. Background Technology

[0002] The most critical aspect of prefabricated assembly structure systems is the joint connection technology of prefabricated components. The bearing capacity, stiffness, and stability of prefabricated shear walls are affected by the strength of the joint connections.

[0003] Currently, research on horizontal joints in shear walls is relatively mature. Vertical joints are generally connected directly using wet-type methods such as stirrup pin connections, grouting sleeve connections, and grout-anchored lap joints. The load-bearing capacity of shear walls using this connection method is basically equivalent to that of cast-in-place shear walls, but it has problems such as cumbersome on-site construction, long construction period, and large amount of wet work.

[0004] Dry connection methods for shear walls include flexible cable connections, anchor bolt connections, pre-embedded steel welding, and pre-embedded steel bolt connections. These methods avoid extensive on-site wet work, reduce exposed rebar for easier transportation, and construction is unaffected by weather. However, flexible cable connections and anchor bolt connections are only suitable for areas with low to moderate earthquakes; while the performance of welded joints is related to welding quality, and residual stress is easily generated in the weld, making it difficult to guarantee construction quality. Bolted connections are unaffected by weather, are convenient to construct, and reduce environmental pollution; compared with welding, bolted connections are more ductile, have stronger energy dissipation capacity, and are easy to install.

[0005] Chinese patent CN109183983B discloses a method for assembling upper and lower interior walls and floor slabs, including the following steps: S1, prefabrication of interior shear walls and floor slabs; S2, hoisting and installation: hoisting and positioning the first interior shear wall, hoisting the first and second floor slabs and placing them on the top two ends of the first interior shear wall, then hoisting the second interior shear wall and placing it on the top side of the first interior shear wall, with the bottom two ends of the second interior shear wall pressed against the support ribs on the top sides of the first and second floor slabs respectively; a cavity is formed between the floor slab and the first and second interior shear walls, and longitudinal reinforcement, tie bars, and anchors are cleverly arranged in different ways; S3, pouring and connecting: pouring concrete into the cavity to form a double-overlapping post-cast beam or a double-anchored horizontal post-cast strip, connecting the floor slab and the interior shear wall into one unit. This connection node requires less on-site construction, reduces costs, saves construction time, and greatly improves the integrity and seismic strength of the building. However, this technology requires setting up formwork before pouring concrete, which results in a long construction period and affects the integrity and load-bearing performance of the shear wall connection. Furthermore, the transportation of exposed steel bars is cumbersome, and there is a lot of wet work on site, making it highly susceptible to weather conditions. Summary of the Invention

[0006] The purpose of this invention is to provide a prefabricated shear wall energy dissipation and vibration reduction joint connection structure and its construction method. By pre-embedding corresponding interface shear-resistant connectors that are welded to the internal shear-resistant steel bars of the prefabricated shear wall on both sides of the prefabricated shear wall, and setting prefabricated slots at the connection points on both sides of each prefabricated shear wall, the prefabricated shear walls are connected into a whole through the prefabricated slots and steel shear-resistant connectors during on-site assembly construction. This solves the problems of complex shear wall assembly construction process, numerous safety measures, long construction period, and difficulty in ensuring quality.

[0007] On one hand, the present invention provides a prefabricated shear wall energy dissipation and vibration reduction joint connection structure, comprising multiple prefabricated shear walls, wherein a vertical joint connection node area is formed between two adjacent prefabricated shear walls on the left and right, a horizontal joint connection node area is formed between two adjacent prefabricated shear walls on the top and bottom, and a corner L-shaped vertical joint connection node area is formed between two vertically adjacent prefabricated shear walls; at least three sets of pre-embedded connectors are provided between any two adjacent prefabricated shear walls, and the pre-embedded connectors are installed at the prefabricated slots on the four sides of the prefabricated shear walls; a prefabricated floor slab is hoisted between the upper prefabricated shear wall and the lower prefabricated shear wall.

[0008] Furthermore, the pre-embedded connector includes a snap-fit ​​part, a fixing part with a snap-fit ​​groove, a high-strength bolt, and an anchoring connector. The snap-fit ​​part is adapted to be installed with the fixing part. Bolt holes are provided on the mating parts of the snap-fit ​​part and the fixing part. The high-strength bolt passes through the bolt holes for locking and fixing. Several anchoring connectors are provided and are evenly distributed on the sides of the snap-fit ​​part and the fixing part that are far apart from each other.

[0009] Furthermore, both the snap-fit ​​part and the fixing part adopt T-type shear soft steel dampers.

[0010] Furthermore, the number of anchoring connectors is 4-8.

[0011] Furthermore, the anchoring connector includes a straight anchoring connector and a hook-type anchoring connector.

[0012] The straight anchoring connector is welded to the back of the flange of the pre-embedded connector on both sides of the vertical seam connection node area.

[0013] The pre-embedded connectors on both sides of the L-shaped vertical seam connection node area at the corner are provided with straight anchor connectors on one side and hook-shaped anchor connectors on the other side.

[0014] The straight anchoring connector is welded to the back of the flange of the pre-embedded connector on both sides of the transverse seam connection node area.

[0015] Furthermore, the top of the prefabricated shear wall is reserved with several positioning bars, and the bottom of the prefabricated shear wall is provided with the same number of riser reserved holes as the positioning bars.

[0016] Furthermore, the flange width of the pre-embedded connector is less than the length of the internal tie rod of the prefabricated shear wall.

[0017] Furthermore, the exposed length of the pre-embedded connector in the transverse joint connection node area is the sum of the depth of the precast groove and the thickness of the precast floor slab.

[0018] Furthermore, the anchoring connector is made of welded steel bars or shear studs.

[0019] On the other hand, the present invention also provides a construction method for a prefabricated shear wall energy dissipation and vibration reduction joint connection structure, applicable to the above-mentioned prefabricated shear wall energy dissipation and vibration reduction joint connection structure, comprising the following steps:

[0020] S1. Fix the anchoring connector to the snap-fit ​​part and the fixing part with the snap-fit ​​joint;

[0021] S2. After the prefabricated shear wall is completed, the snap-fit ​​part is positioned and contacted with the fixing part through the snap-fit ​​joint to form the first layer of connection;

[0022] S3. A second layer of connection is formed by bolting with high-strength bolts.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the pre-embedded connector of the present invention serves as a connector while also playing the role of energy dissipation and vibration reduction. Most of them are pre-embedded inside the wall and coincide with the wall cross section, which avoids out-of-plane distortion of the energy dissipation device, prevents the generation of eccentric bending moment, and has better load-bearing capacity, stiffness and energy dissipation capacity. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the prefabricated shear wall energy dissipation and vibration reduction joint connection structure according to an embodiment of the present invention;

[0026] Figure 2 For located Figure 1 Enlarged view of the vertical seam connection node area in the image;

[0027] Figure 3 For located Figure 1 Enlarged view of the L-shaped vertical seam connection node area at the corner;

[0028] Figure 4 For located Figure 1 Enlarged view of the transverse seam connection node area;

[0029] Figure 5 This is a schematic diagram of the structure of the pre-embedded connector in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of a precast floor slab according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1: Prefabricated shear wall; 2: Straight vertical joint connection area; 3: Corner L-shaped vertical joint connection area; 4: Horizontal joint connection area; 5: Precast floor slab; 6: Embedded connectors; 6-1: Clip-on part; 6-2: Fixing part; 7: Anchor connectors; 7-1: Straight anchor connectors; 7-2: Hook-type anchor connectors; 8: Precast grooves; 9: Bolt holes; 10: Clip-on joints; 11: High-strength bolts; 12: Riser reserved holes; 13: Positioning bars. Detailed Implementation

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] 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," and "counterclockwise," etc., 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 limiting this invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] like Figures 1 to 6 As shown, the present invention provides a prefabricated shear wall energy dissipation and vibration reduction joint connection structure, including multiple prefabricated shear walls 1. A straight vertical joint connection node area 2 is formed between two adjacent prefabricated shear walls 1 on the left and right, a horizontal joint connection node area 4 is formed between two adjacent prefabricated shear walls 1 on the top and bottom, and a corner L-shaped vertical joint connection node area 3 is formed between two vertically adjacent prefabricated shear walls 1. At least three sets of pre-embedded connectors 6 are provided between any two adjacent prefabricated shear walls 1. The pre-embedded connectors 6 are installed at the prefabricated slots 8 on the four sides of the prefabricated shear wall 1. A prefabricated floor slab 5 is hoisted between the upper prefabricated shear wall 1 and the lower prefabricated shear wall 1.

[0037] Preferably, 3-5 sets of pre-embedded connectors 6 are provided between any two adjacent prefabricated shear walls 1. The pre-embedded connectors 6 include a snap-fit ​​part 6-1, a fixing part 6-2 with a snap-fit ​​joint 10, a high-strength bolt 11, and an anchoring connector 7. The snap-fit ​​part 6-1 is fitted to the fixing part 6-2, and bolt holes 9 are provided on the mating parts of the snap-fit ​​part 6-1 and the fixing part 6-2. The high-strength bolt 11 passes through the bolt holes 9 for locking and fixing. Several anchoring connectors 7 are provided, evenly distributed on the mutually distant sides of the snap-fit ​​part 6-1 and the fixing part 6-2. Both the snap-fit ​​part 6-1 and the fixing part 6-2 use T-type shear soft steel dampers.

[0038] The pre-embedded connector 6 is assembled inside the wall and coincides with the wall section to ensure the wall is in a balanced stress state and will not generate an eccentric bending moment during the stress process of the pre-embedded connector 6.

[0039] During an earthquake, the flanges of the pre-embedded connector 6 provide tensile, shear, and limiting functions, and the concrete enclosed by the two flanges also enhances the strength of the shear wall at the connection point due to the pressure.

[0040] The exposed part of the pre-embedded connector 6 has 6 bolt holes 9, which are connected by the slot 10. After the connection is made, the bolt holes 9 of the pre-embedded connector 6 on both sides correspond to each other. Then, the high-strength bolt 11 passes through the bolt holes 9 to lock and fix the slot 6-1 and the fixing part 6-2.

[0041] Preferably, the number of anchoring connectors 7 is 4-8. The anchoring connectors 7 include straight anchoring connectors 7-1 and hook-type anchoring connectors 7-2. Straight anchoring connectors 7-1 are welded to the back of the flanges of the embedded connectors 6 on both sides of the straight vertical seam connection node area 2. For the embedded connectors 6 on both sides of the corner L-shaped vertical seam connection node area 3, one side uses a straight anchoring connector 7-1, and the other side uses a hook-type anchoring connector 7-2. Straight anchoring connectors 7-1 are welded to the back of the flanges of the embedded connectors 6 on both sides of the horizontal seam connection node area 4.

[0042] The anchoring connector 7 transfers the energy at the joint to the interior of the prefabricated shear wall 1, moderately reducing the load on the joint, strengthening the tensile and shear resistance of the embedded connector 6, and enhancing the overall integrity of the component connection.

[0043] Several positioning bars 13 are pre-reserved at the top of the prefabricated shear wall 1, and the bottom of the prefabricated shear wall 1 has the same number of riser holes 12 as the positioning bars 13. The flange width of the embedded connector 6 is less than the length of the internal tie bars of the prefabricated shear wall 1. The exposed length of the embedded connector 6 in the transverse joint connection node area 4 is the sum of the depth of the precast groove 8 and the thickness of the precast floor slab 5. The anchoring connector 7 uses welded steel bars or shear studs.

[0044] Combination Figure 2 and Figure 3 When the prefabricated shear wall 1 is connected laterally, the left prefabricated shear wall 1 is positioned first, the right prefabricated shear wall 1 is lifted, and the snap-fit ​​part 6-1 of the right prefabricated shear wall 1 is aligned with the snap-fit ​​joint 10 of the fixing part 6-2 of the left prefabricated shear wall 1. After being fixed by high-strength bolts 11, concrete is poured in the prefabricated groove 8.

[0045] like Figure 4 As shown, similar to the horizontal assembly connection of the precast shear wall, when performing the vertical assembly connection, the precast floor slab is hoisted and positioned onto the lower precast shear wall 1 through the pre-reserved hole 12 of the riser and the positioning bar 13, and then the upper precast shear wall 1 is hoisted and positioned through the clamp 10. After being fixed by the high-strength bolts 11, concrete is poured into the precast groove 8.

[0046] This invention also provides a construction method for a prefabricated shear wall energy dissipation and vibration reduction joint connection structure, applicable to the aforementioned prefabricated shear wall energy dissipation and vibration reduction joint connection structure, comprising the following steps:

[0047] S1. Weld the anchoring connector 7 to the snap-fit ​​part 6-1 and the fixing part 6-2 with the snap-fit ​​10;

[0048] S2. After the prefabricated shear wall 1 is completed, the snap-fit ​​part 6-1 is positioned and contacted with the fixing part 6-2 through the snap-fit ​​joint 10 to form the first layer of connection;

[0049] S3. A second layer of connection is formed by bolting with high-strength bolts 11.

[0050] The construction method of this invention adopts a double-layer connection, which enhances the out-of-plane torsional strength, integrity, and stress performance between adjacent prefabricated shear walls 1. It can provide sufficient initial stiffness at the joint of the prefabricated shear wall 1 under minor earthquakes, and can absorb seismic energy and enhance structural ductility through pre-embedded connectors 6 under major earthquakes.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A prefabricated shear wall energy dissipation and vibration reduction joint connection structure, characterized in that, It includes multiple prefabricated shear walls (1), with a vertical joint connection area (2) formed between two adjacent prefabricated shear walls (1) on the left and right, a horizontal joint connection area (4) formed between two adjacent prefabricated shear walls (1) on the top and bottom, and a corner L-shaped vertical joint connection area (3) formed between two vertically adjacent prefabricated shear walls (1); at least 3 sets of pre-embedded connectors (6) are provided between any two adjacent prefabricated shear walls (1), and the pre-embedded connectors (6) are installed at the prefabricated slots (8) on the four sides of the prefabricated shear wall (1); the prefabricated floor slab (5) is hoisted between the upper prefabricated shear wall (1) and the lower prefabricated shear wall (1); The pre-embedded connector (6) includes a snap-fit ​​part (6-1), a fixing part (6-2) with a snap-fit ​​slot (10), a high-strength bolt (11), and an anchoring connector (7). The snap-fit ​​part (6-1) is adapted to the fixing part (6-2). Bolt holes (9) are provided on the mating parts of the snap-fit ​​part (6-1) and the fixing part (6-2). The high-strength bolt (11) passes through the bolt holes (9) for locking and fixing. Several anchoring connectors (7) are provided and are evenly distributed on the sides of the snap-fit ​​part (6-1) and the fixing part (6-2) that are far apart from each other. Both the snap-fit ​​part (6-1) and the fixing part (6-2) adopt T-type shear soft steel dampers; The anchoring connector (7) includes a straight anchoring connector (7-1) and a hook anchoring connector (7-2). The back of the flanges of the embedded connectors (6) on both sides of the straight vertical seam connection node area (2) are all welded with the straight anchoring connector (7-1). The embedded connectors (6) on both sides of the corner L-shaped vertical seam connection node area (3) use the straight anchoring connector (7-1) on one side and the hook anchoring connector (7-2) on the other side. The back of the flanges of the embedded connectors (6) on both sides of the horizontal seam connection node area (4) are all welded with the straight anchoring connector (7-1).

2. The prefabricated shear wall energy dissipation and vibration reduction joint connection structure according to claim 1, characterized in that, The number of anchoring connectors (7) is 4-8.

3. The prefabricated shear wall energy dissipation and vibration reduction joint connection structure according to claim 1, characterized in that, The top of the prefabricated shear wall (1) has several positioning bars (13), and the bottom of the prefabricated shear wall (1) has the same number of riser reserved holes (12) as the positioning bars (13).

4. The prefabricated shear wall energy dissipation and vibration reduction joint connection structure according to claim 1, characterized in that, The flange width of the pre-embedded connector (6) is less than the length of the internal tie rod of the prefabricated shear wall (1).

5. The prefabricated shear wall energy dissipation and vibration reduction joint connection structure according to claim 1, characterized in that, The exposed length of the pre-embedded connector (6) in the transverse joint connection node area (4) is the sum of the depth of the precast groove (8) and the thickness of the precast floor slab (5).

6. The prefabricated shear wall energy dissipation and vibration reduction joint connection structure according to claim 1, characterized in that, The anchoring connector (7) is made of welded steel bars or shear studs.

7. A construction method for a prefabricated shear wall energy dissipation and vibration reduction joint connection structure, characterized in that, The method applied to the prefabricated shear wall energy dissipation and vibration reduction joint connection structure according to any one of claims 1-6 includes the following steps: S1. Fix the anchoring connector (7) to the snap-fit ​​part (6-1) and the fixing part (6-2) with the snap-fit ​​slot (10); S2. After the prefabricated shear wall (1) is prefabricated, the snap-fit ​​part (6-1) is positioned and contacted with the fixing part (6-2) through the snap-fit ​​joint (10) to form the first layer of connection; S3. A second layer of connection is formed by bolting with high-strength bolts (11).

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