ASSEMBLED CONCRETE SHEAR WALL JOINTS AND METHOD OF ASSEMBLY THEREOF

Abstract

A shear wall connector comprising a pre-built member and a connector, the pre-built member comprising a side plate, a peg, and a shear key, the side plate being provided with a first through hole, the peg and the shear key being provided on the inner and outer sides of the side plate respectively, the peg being provided with a threaded hole at the end connected to the side plate and having the threaded hole aligned with the first through hole wherein the connection member comprises an H-beam, the flange plate of the H-beam being provided with a second through-hole and a shear key adaptor hole matching the first through-hole and the shear key in the side plate. The pre-built elements are pre-built in the concrete wall surface and are assembled by means of the connectors. During installation, the shear key is inserted into the shear key adaptor hole.

Claims

1. A shear wall connection member, comprising a pre-built member and a connection member, the pre-built member comprising a side plate, pegs, and shear keys, the side plate being provided with a plurality of first through holes at intervals, the pegs and shear keys being provided at intervals on the inner and outer sides of the side plate respectively, each peg is provided with a threaded hole at the end where it is attached to the side plate and the threaded hole is aligned with the first through hole, and the connection member comprises an H-beam and a rib spaced between the two flange plates and the web of the H-beam, flange plate of the H-beam being provided with the same connection as the first through hole in the side plate, the connection member comprising an H-beam and a rib spaced between the two flange plates and the web of the H-beam, the flange plate of the H-beam being provided with the same connection as the first through hole in the side plate with a second through-hole and shear key adaptation holes matching the first through-hole and shear key on the side plate.

2. The shear wall connection member according to claim 1, wherein the first through holes and shear keys on the pre-built member are spaced alternately with each other.

3. The shear wall connection member according to claim 1, wherein the shear key is a conical table structure and the larger end is fixed to the side plate, and the shear key adaptor hole is an inverted conical hole adapted to the shear key.

4. The shear wall connection member according to claim 1, wherein the height of the shear key is 5-10 mm higher than the depth of the shear key adaptation hole.

5. The shear wall connection member according to claim 1, wherein the shear key adaptation hole is provided at the corner formed by the web and the ribs of the H-beam.

6. The shear wall connection member according to claim 1, wherein the peg is provided with a hemispherical top cap at one end away from the side plate, and the outer diameter of the hemispherical top cap being larger than the outer diameter of the peg.

7. An assembled shear wall, comprising a reinforced concrete precast wall panel and the shear wall connection member according to claim 1, wherein the side panels of a precast member are provided on the assembly surface of the precast wall panel, and the wall panel reinforcement in the precast wall panel is welded to the inner side of the side panels, the connection member being located between the assembly surfaces of two adjacent prefabricated wall panels, said prefabricated parts and the connection being matched and welded together by means of shear keys and shear key adaptation holes and being held together by bolts passing through second through holes, first through holes, and threaded holes in turn.

8. The assembled shear wall as claimed in claim 7, wherein for shear walls requiring a floor slab, a transverse connection is provided at the top of the shear wall, the floor slab comprising a prefabricated floor slab and a cast-in-place floor slab, the lapped end of the prefabricated floor slab being lapped to the lower flange plate of the H-beam by means of an exposed floor slab reinforcement with bending hooks, the cast-in-place floor slab is cast in place on the prefabricated floor slab and the end of a negative moment reinforcement is welded to the web of the H-beam.

9. The assembled shear wall as claimed in claim 8, wherein the side plate of the prefabricated member is located in the centre of the assembled face of the prefabricated wall slab and its sides are 8-12 mm from both sides of the prefabricated wall slab, and the width of the described connection being equal to the width of the side plate.

10. A method for assembling the assembled shear wall according to claim 9, comprising the following steps: a. making pre-built parts and connections according to the dimensions of the walls and floor slabs; b. forming a reinforcement mesh with a border by using the pre-built elements as a border and welding wall slab reinforcement on the inside thereof; c. prefabrication of precast wall panels with borders by pouring concrete inside the reinforcement mesh with borders and also prefabrication of precast floor slabs with exposed bent reinforcement; d. installation of multiple prefabricated wall panels by means of connectors to form one-, L-, T- and cross-shaped lower assembled shear walls, and ensuring that there are horizontal connectors in the areas where floor slabs are to be erected; e. installation of the prefabricated floor slab by lapping the exposed floor reinforcement with curved hooks of the prefabricated floor slab onto the lower flange plate of the horizontal connector H-beam; f. tying negative moment reinforcement to the prefabricated floor slab, with the ends of the negative moment reinforcement welded to the web of the H-beam and then pouring the cast-in-place floor slab; and g. installing the upper assembled shear wall in accordance with the installation method of the lower assembled shear wall; after the assembly is completed, the exposed connectors and pre-built connectors are treated with anti-rust paint for anti-rust treatment, and then the gaps in the connectors are filled with dry hard aerated concrete or rock wool, and finally painted with cement mortar.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG. 1 is a schematic diagram of the structure of the shear wall connection of the present invention.

[0030] FIG. 2 is a schematic diagram of the structure of the pegs of the present invention.

[0031] FIG. 3 is a schematic diagram of the shear key installation structure of the present invention.

[0032] FIG. 4 is a schematic diagram of the structure of the assembled shear wall of the present invention.

[0033] FIG. 5 is a schematic diagram of the structure of the assembled shear wall reinforcement network of the present invention.

[0034] FIG. 6 is a schematic diagram of the floor slab installation structure of the present invention.

[0035] The drawings are marked as, 1—pre-built, 2—connection, 3—prefabricated wall slab, 4—prefabricated floor slab, 5—cast-in-place floor slab, 11—side slab, 12—peg, 13—shear key, 14—first through-hole, 15—threaded hole, 16—hemispherical top cap, 21—H-beam, 22—flange plate, 23—shear key adaptation hole, 24—second through-hole, 25—ribbed plate, 26—web, 31—wall slab reinforcement, 41—floor slab reinforcement, 51—negative moment reinforcement.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The present invention is further described below in conjunction with the accompanying drawings.

[0037] As shown in FIGS. 1-3, the shear wall connection of the present invention comprises a pre-built member 1 and a connection member 2, the described pre-built member 1 comprising a side plate 11, a peg 12 and a shear key 13, the described side plate 11 having a plurality of first through-holes 14 set at intervals, the described peg 12 and shear key 13 also comprising a plurality and set at intervals on the inner and outer sides of the side plate 11 respectively, the described peg 12 being connected to the side plate 11 at one end with described connecting member 2 comprises an H-beam 21 and a rib 25 spaced between two flange plates 22 of the H-beam 21, described flange plates 22 of the H-beam 21 being provided with a second through-hole 24 and a shear key adaptor hole 23 matching the first through-hole 14 and the shear key 13 in the side plate 11.

[0038] The described pre-buried parts 1 are pre-buried on the surface of the concrete wall to facilitate the assembly of the concrete wall by means of the connecting parts 2. During installation the shear key 13 on the pre-buried member 1 is inserted into the shear key adaptation hole 23 to provide shear resistance, which is then fixed by means of bolts passing through the second through hole 24, the first through hole 14 and the peg 12. Compared with the existing assembly methods, the shear wall connectors of the present application do not require temporary support and can achieve dry modular construction, ensuring safe and reliable transmission of tension and shear between the connectors and the prefabricated wall panels, enhancing the integrity of the shear wall; at the same time, the adaptability of the pre-buried parts and connectors has been verified in the factory, which can ensure precise seating of the pre-buried parts and connectors during on-site installation, speeding up the This speeds up the construction process, helps to save costs and has better economic benefits.

[0039] To facilitate construction and to ensure the reliability of the assembly, the present application provides some preferred ways of doing so as follows:

[0040] To provide a good connection, said first through-hole 14 and shear-resistant key 13 on the described pre-embedded member 1 are alternately spaced apart from each other.

[0041] To facilitate alignment of the anti-shear key 13 with the anti-shear key adaptation hole 23 during assembly, the described anti-shear key 13 is a conical table structure and the larger end is fixed to the side plate 11, and the described anti-shear key adaptation hole 23 is an inverted conical hole adapted to the anti-shear key 13.

[0042] In the installation process, in order to play a good shear and tensile effect, it is necessary to weld the anti-shear key 13 with the anti-shear key adaptation hole 23 after the docking is completed, therefore, in order to facilitate welding, the height of the described anti-shear key 13 is preferably 5-10 mm higher than the depth of the anti-shear key adaptation hole 23 to ensure that the anti-shear key 13 can pass through the anti-shear key adaptation hole 23 during installation, so as to facilitate subsequent welding around the anti-shear key 13.

[0043] Further, as shown in FIG. 3, the described shear key adaptation hole 23 is preferably set at the corner formed by the web 26 and the rib 25 of the H-beam 21, so that both the web 26 and the rib 25 of the connection 2 can play a certain limiting and fixing role against the shear key 23, thus improving the shear and tensile strength.

[0044] For the peg 12, in order to facilitate the processing of the threaded hole 15, a threaded sleeve structure can be used, but in order to avoid concrete entering the threaded hole during the production of the precast wall panel, a hemispherical top cap 16 can be set at the end of the peg 12 away from the side plate 11, as shown in FIG. 2, the outer diameter of the hemispherical top cap 16 is larger than the outer diameter of the peg 12 by about 5 mm, which can avoid concrete entering the threaded hole 15, and at the same time can avoid The prefabricated concrete wall can also be prevented from being loosened by the prefabricated concrete wall.

[0045] The assembled shear wall made with the above-mentioned shear wall connectors, as shown in FIGS. 4 and 5, comprises a reinforced concrete precast wall panel 3, and also comprises a shear wall connector, wherein the side plate 11 of the pre-buried member 1 is set on the assembly surface of the precast wall panel 3, and the wall plate reinforcement 31 in the precast wall panel 3 is welded to the inner side of the side plate 11, and said connector 2 is located between the assembly surfaces of two adjacent precast wall panels 3. The described pre-embedded member 1 and the connection member 2 are matched and welded together by means of shear keys 13 and shear key adaptation holes 23 and are fixed together by bolts passing through the second through-hole 24, the first through-hole 14 and the threaded hole 15 in that order. The installation of shear wall panels in one-piece, L-shaped, T-shaped or continuous-beam sections can be achieved by rationalising the position of pre-built parts 1 and connectors 2, which is highly versatile.

[0046] Further, in order to accommodate the construction of the floor slab, a transverse connection 2 is provided at the top of the shear wall where the floor slab is to be erected. according to the Technical Specification for Assembled Concrete Structures (JGJ 1-2014), the floor slab of an assembled concrete frame structure is to be provided with a cast-in-place layer to ensure structural integrity, so that the described floor slab comprises a prefabricated floor slab 4 and a cast-in-place floor slab 5, the said prefabricated floor slab 4 having The lap end of the described prefabricated floor slab 4 is lapped on the lower flange of the H-beam 21 by means of exposed floor bars 41 with bending hooks, and the said cast-in-place floor slab 5 is cast-in-place on the prefabricated floor slab 4 and the end of its negative moment bars 51 are welded to the web 26 of the H-beam 21.

[0047] In order to avoid rusting of the exposed steel structure, the side plates 11 of the described prefabricated part 1 are located in the centre of the assembly surface of the prefabricated wall panel 3, and their sides are 8-12 mm away from the two sides of the prefabricated wall panel 3. The width of the described connection 2 is comparable to the width of the side plates 11. This leaves a gap after the assembly is completed, which facilitates subsequent painting with cement mortar and ensures a flat wall surface.

[0048] For the specific assembly method of assembled shear walls, as shown in FIGS. 5 and 6, the following steps are included. [0049] a. Making pre-buried parts and connections according to the dimensions of the walls and floor slabs; [0050] b. Using the pre-built elements as borders and welding wall slab reinforcement on the inside of them to form a reinforcement mesh with borders; [0051] c. Prefabrication of precast wall panels with borders by pouring concrete inside the reinforcement mesh with borders and also prefabrication of precast floor slabs with exposed bent reinforcement; [0052] d. Installation of multiple prefabricated wall panels by means of connectors to form one-, L-, T- and cross-shaped lower assembled shear walls, and ensuring that there are horizontal connectors in the areas where floor slabs are to be erected; [0053] e. Installation of the prefabricated floor slab by lapping the exposed floor reinforcement with curved hooks of the prefabricated floor slab onto the lower flange plate of the horizontal connector H-beam; [0054] f Tying negative moment reinforcement to the prefabricated floor slab, with the ends of the negative moment reinforcement welded to the web of the H-beam and then pouring the cast-in-place floor slab; [0055] g. Install the upper assembled shear wall according to the installation method of the lower assembled shear wall, and after the assembly is completed, rustproof the exposed connections and pre-built connections with anti-rust paint, then fill the gaps in the connections with dry hard aerated concrete or rock wool, and finally paint them with cement mortar.

[0056] Using the shear wall connectors and assembly method of the present invention, dry modular construction of assembled shear walls can be achieved, which enhances the integrity of the shear walls, helps to speed up the construction progress, saves costs and has better economic benefits.