Concrete module wall body connecting component based on E-shaped and pi-shaped embedded connecting pieces and assembling method of concrete module wall body connecting component

Abstract

The invention provides a concrete module wall body connecting component based on E-shaped and pi-shaped embedded connecting pieces, the component is composed of an E-shaped perforated shear force connecting piece and a pi-shaped perforated shear force connecting piece, and the E-shaped perforated shear force connecting piece and the pi-shaped perforated shear force connecting piece are both provided with square bottom plates; three rib plates protruding in the thickness direction of the wall body are evenly arranged on the portion, on the basis of the square bottom plate, of the E-shaped holed shear connecting piece in the height direction of the wall body, and two rib plates protruding in the thickness direction of the wall body are evenly arranged on the portion, on the basis of the square bottom plate, of the pi-shaped holed shear connecting piece in the height direction of the wall body. The grooves between the rib plates are matched with the raised rib plates of the E-shaped opening shearing force connecting piece; the rib plate is provided with two symmetrically-arranged through round holes in the height direction of the wall body, and the two through round holes are connected in a through mode through vertical joint bars. Cooperative transmission of wall shearing force and bending moment is achieved through the component, and the shearing resistance and the shock resistance of the wall in the modular building system are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building structure engineering, and in particular to a concrete module wall connecting component based on E-shaped and π-shaped embedded connecting pieces and an assembling method thereof. BACKGROUND

[0002] With the higher requirements of the state on the industrialization, greenization and intelligent development of the construction industry, modular prefabricated buildings gradually become an important direction to promote the transformation and upgrading of the construction industry due to high construction efficiency and low resource consumption. In modular buildings, the connection mode between prefabricated units will directly affect the integrity, safety and construction efficiency of the structural system.

[0003] At present, the wall of the concrete modular prefabricated building is usually connected by tie members or counter-bolts, and the internal cavity is finally cast on site. The tie members or counter-bolts in the wall are the key components for connecting adjacent concrete modules and effectively transmitting the interaction between the wallboards to ensure the overall performance of the structure. The connection structure using tie members or counter-bolts as connecting pieces has the following assembly process: steel bars are bound and truss steel bars are placed in the adjacent concrete module walls, respectively, preset holes and embedded parts are set, concrete of the concrete module wall is poured and maintained, after maintenance is completed, it is transported to the site, uses inclined bracing to ensure that the adjacent concrete module walls are vertical, uses tie members or counter-bolts to constrain the two side walls before pouring the internal cavity, pours the internal cavity between the two side walls on site, and removes the external support after the wall is formed as a whole. This kind of scheme has the following defects in actual engineering: (1) insufficient shear and seismic performance: the connecting piece mainly bears axial tension and compression, and the shear force and bending moment are low in cooperative transmission efficiency, resulting in poor ductility of the wall as a whole, which cannot be applied to seismic building projects. (2) Complicated construction process: site bolt fastening and secondary grouting are required, which affects the assembly speed. Therefore, it is necessary to design a concrete module wall connecting component based on E-shaped and π-shaped embedded connecting pieces and an assembling method thereof. SUMMARY

[0004] The purpose of the present application is to provide a concrete module wall connecting component based on E-shaped and π-shaped embedded connecting pieces and an assembling method thereof, which realizes the cooperative transmission of wall shear force and bending moment by a kind of embedded combined connecting piece for the prefabricated wall between concrete modules and a method for assembling the concrete modular building using the connecting piece.

[0005] To achieve the above purpose, the present application provides the following solutions:

[0006] The application discloses a concrete module wall connecting component based on E-shaped and pi-shaped embedded connecting pieces, which comprises an E-shaped opening shear connecting piece and a pi-shaped opening shear connecting piece; the E-shaped opening shear connecting piece comprises a square bottom plate and three protruding E-shaped rib plates; the pi-shaped opening shear connecting piece comprises a square bottom plate and two protruding pi-shaped rib plates; the E-shaped rib plates and the pi-shaped rib plates are provided with two symmetrical through holes; the rib plate spacing between the E-shaped rib plates is the same as the thickness of the pi-shaped rib plates, and the rib plate spacing between the pi-shaped rib plates is the same as the thickness of the E-shaped rib plates; the two E-shaped rib plates are respectively aligned with the edges of the square bottom plate, the E-shaped rib plates are parallel to each other, and the pi-shaped rib plates are parallel to each other; the rib plate width of the E-shaped rib plates is the same as that of the pi-shaped rib plates and is greater than the internal cavity thickness between the two walls; the E-shaped opening shear connecting piece and the pi-shaped opening shear connecting piece are integrally processed and formed.

[0007] Optionally, when the E-shaped rib plates and the pi-shaped rib plates are spliced, the through holes of the E-shaped rib plates and the through holes of the pi-shaped rib plates are coaxial holes; the hole diameter D of the through holes is less than or equal to the internal cavity thickness and less than or equal to the rib plate width; the hole diameter ranges from 18 mm to 32 mm.

[0008] Optionally, the through holes are connected through vertical reinforcing bars, and the diameter d of the vertical reinforcing bars satisfies the condition 0.8D ≤ d ≤ 0.9D.

[0009] Optionally, the side length of the square bottom plate ranges from 120 mm to 260 mm, and the distance, which is greater than 20 mm, between the side length and the maximum spacing of the distribution steel bars of the prefabricated wall exceeds the maximum spacing of the distribution steel bars; the thickness of the square bottom plate ranges from 8 mm to 25 mm.

[0010] Optionally, the rib plate width b satisfies the condition 2t1 + b = t0 + c1 + c2, wherein t1 is the thickness of the square bottom plate, t0 is the internal cavity thickness, and c1 and c2 are the distances from the distribution steel bars of the two walls to the outer concrete edges.

[0011] The thickness of the E-shaped rib plates and the thickness of the pi-shaped rib plates range from 6 mm to 36 mm; and the rib plate spacing ranges from 10 mm to 80 mm.

[0012] A concrete module wall connecting component assembly method based on E-shaped and pi-shaped embedded connecting pieces is applied to the concrete module wall connecting component based on E-shaped and pi-shaped embedded connecting pieces.

[0013] Distribution steel bars are arranged in the first module wall formwork and the second module wall formwork, the E-shaped opening shear connecting piece and the pi-shaped opening shear connecting piece are respectively spot-welded and fixed on the distribution steel bars of the two walls, and first concrete module walls containing the E-shaped opening shear connecting pieces and second concrete module walls containing the pi-shaped opening shear connecting pieces are formed by pouring.

[0014] The E-shaped opening shear connector is embedded in the π-shaped opening shear connector to splice the first concrete module wall and the second concrete module wall;

[0015] The vertical reinforcing bar is penetrated through the through-hole to constrain the relative displacement between the two walls;

[0016] The internal cavity between the two walls is closed by using a strip-shaped wooden mold, and concrete is poured.

[0017] Optionally, the vertical reinforcing bar uses HRB400 grade steel bars.

[0018] According to the specific embodiments provided by the present application, the following technical effects are disclosed: the concrete module wall connecting component based on the E-shaped and π-shaped embedded connecting component provided by the present application is composed of an E-shaped opening shear connector fixedly connected with a first concrete module wall, a π-shaped opening shear connector fixedly connected with a second concrete module wall, and a vertical reinforcing bar penetrating through through-holes of the E-shaped opening shear connector and the π-shaped opening shear connector along the vertical direction of the wall. The E-shaped opening shear connector and the π-shaped opening shear connector both have a square base plate. The E-shaped opening shear connector is uniformly provided with three rib plates protruding in the thickness direction of the wall along the height direction of the wall based on the square base plate, and the π-shaped opening shear connector is uniformly provided with two rib plates protruding in the thickness direction of the wall along the height direction of the wall based on the square base plate, and the grooves between the rib plates match the protruding rib plates of the E-shaped opening shear connector. The rib plates are provided with two symmetrical through-holes in the height direction of the wall. Through the component, the shear force and the bending moment of the wall are cooperatively transmitted, and the shear performance and the seismic capacity of the wall in the modular building system are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described below only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0020] Fig. 1 The schematic diagram of the connecting component connecting the prefabricated wall of the concrete module of the embodiment of the present application;

[0021] Fig. 2 The structure diagram of the E-shaped opening shear connector of the embodiment of the present application;

[0022] Fig. 3 The structure diagram of the π-shaped opening shear connector of the embodiment of the present application;

[0023] Fig. 4A first concrete module wall structure diagram of the present application with an E-shaped opening shear connector;

[0024] Fig. 5 A second concrete module wall structure diagram of the present application with a π-shaped opening shear connector;

[0025] Fig. 6 A top view of the wall after splicing of the present application;

[0026] Fig. 7 A side view of the wall after splicing of the present application.

[0027] Reference signs: 1, first concrete module wall; 2, second concrete module wall; 3, E-shaped opening shear connector; 4, π-shaped opening shear connector; 5, square base plate; 6, rib plate; 7, vertical dowel; 8, strip-shaped wood mold; 9, vertical distribution steel bar; 10, horizontal distribution steel bar. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0029] The above purposes, features and advantages of the present application will be more obvious and easy to understand. The present application will be described in further detail below with reference to the drawings and specific embodiments.

[0030] As Figs. 1-3As shown, the present application provides a concrete module wall connecting component based on E-shaped and π-shaped embedded connectors, which is composed of an E-shaped open-hole shear connector 3 fixedly connected with a first concrete module wall 1, a π-shaped open-hole shear connector 4 fixedly connected with a second concrete module wall 2, and a vertical reinforcing bar 7 vertically penetrating through the through-hole of the E-shaped open-hole shear connector 3 and the π-shaped open-hole shear connector 4. The E-shaped open-hole shear connector 3 and the π-shaped open-hole shear connector 4 both have a square base plate. The E-shaped open-hole shear connector 3 is uniformly provided with three rib plates 6 protruding in the thickness direction of the wall along the height direction of the wall based on the square base plate, and the π-shaped open-hole shear connector 4 is uniformly provided with two rib plates 6 protruding in the thickness direction of the wall along the height direction of the wall based on the square base plate, and the grooves between the rib plates 6 match the protruding rib plates 6 of the E-shaped open-hole shear connector 3. The rib plates 6 are provided with two symmetrically arranged through-holes in the height direction of the wall. The square base plates of the E-shaped open-hole shear connector 3 and the π-shaped open-hole shear connector 4 are welded with the horizontal distribution steel bars 10 or the vertical distribution steel bars 9 of the prefabricated wall, and are specifically welded between the distribution steel bar spacing apertures, that is, are placed between the adjacent horizontal distribution steel bars 10 or vertical distribution steel bars 9.

[0031] The rib plates 6 of the E-shaped open-hole shear connector 3 can be self-positioned and docked by being embedded in the grooves of the rib plates 6 of the π-shaped open-hole shear connector 4, and then the vertical reinforcing bar 7 penetrates through the through-hole to transfer shear force and constrain the relative displacement of the two side concrete module prefabricated walls. Finally, a strip-shaped wood mold 8 is used to close the internal cavity between the two side concrete module prefabricated walls and to pour and fill concrete.

[0032] Specifically, the hole diameter D of the through-hole is less than or equal to the thickness of the internal cavity and less than or equal to the width of the rib plate 6, and the range of the hole diameter is 18mm-32mm. The through-hole is connected through the vertical reinforcing bar 7, and the diameter d of the vertical reinforcing bar 7 satisfies the condition 0.8D≤d≤0.9D. The side length of the square base plate ranges from 120mm to 260mm, and the side length exceeds the maximum spacing of the internal distribution steel bars of the prefabricated wall by more than 20mm; the thickness of the square base plate ranges from 8mm to 25mm. The thickness of the rib plate 6 ranges from 6mm to 36mm; and the rib plate spacing ranges from 10mm to 80mm.

[0033] In some embodiments, the horizontal distribution steel bars 10 in the prefabricated wall have a spacing s h The same as the vertical steel bar spacing s v Both use HRB400 grade steel bars. Wherein s v is determined according to the minimum cross-sectional area, and the cross-sectional area A s is: A s ≥[N-(F cr H / M w -f t )Ac -n cc (F cr H / M w -f t )A cc ] / n sc (F cr H / M w -f t ), wherein N is the axial pressure of the wall, F cr is the expected cracking load of the wall, H is the height of the wall, M w is the bending moment of the wall, f t is the axial tensile strength of the concrete, A c is the net sectional area of the wall concrete, n cc is the ratio of the Young's modulus of the prefabricated concrete to the post-cast concrete, A cc is the sectional area of the prefabricated wall, n sc is the ratio of the Young's modulus of the vertical reinforcing bar 7 to the post-cast concrete. The side length a of the square base plate is: a ≥ s h + 20 mm. The width b of the rib plate 6 is: b ≥ t0, wherein t0 is the thickness of the internal cavity between the two walls. The thickness t1 of the square base plate is:

[0034] t1 = (t0 + c1 + c2 - b) / 2, wherein c1 and c2 are the distances from the two internal distribution steels to the outer concrete edge. The vertical reinforcing bar 7 uses HRB400 grade steel with the same length as the wall height, and the single nominal sectional area A in is: A in ≥ (V u - 0.8N - 0.6f y A s ) / 0.6nf y,in , wherein V u is the shear force of the sectional shear wall bottom reinforcement zone, f y is the yield strength design value of the vertical distribution steel 9, A s is the total area of the vertical distribution steel 9, n is the number of vertical reinforcing bars 7, f y,in is the yield strength design value of the vertical reinforcing bar 7. The diameter D of the through-hole is: 1.25d ≥ D ≥ 1.1d, wherein d is the diameter of the vertical reinforcing bar 7, and D ≤ t0 and D ≤ b. The square base plate, the rib plate 6 and the vertical reinforcing bar 7 all use structural steel materials that meet the force requirements. The E-shaped opening shear connector 3 and the π-shaped opening shear connector 4 are integrally formed, and the square base plate and the rib plate 6 cannot be connected by welding.

[0035] The application also provides an assembly method of a concrete module wall connecting component based on E-shaped and π-shaped embedded connectors, which is applied to the concrete module wall connecting component based on E-shaped and π-shaped embedded connectors described above, and comprises:

[0036] Firstly, the distribution steel bars are arranged in the first module wall formwork and the second module wall formwork respectively, the E-shaped opening shear connectors 3 and the π-shaped opening shear connectors 4 are respectively spot-welded and fixed on the distribution steel bars of the two walls, and the first concrete module wall 1 containing the E-shaped opening shear connectors 3 and the second concrete module wall 2 containing the π-shaped opening shear connectors 4 are formed by pouring.

[0037] Specifically, as shown in Fig. 4 and 5 , when the vertical distribution steel bars 9 and the horizontal distribution steel bars 10 of the concrete module prefabricated wall are arranged in the strip-shaped wood form 8, a certain number (determined according to the seismic fortification requirements of the building area) of E-shaped opening shear connectors 3 are placed at the predetermined positions in the first concrete module wall 1 formwork according to the requirements; the same number of π-shaped opening shear connectors 4 are placed at the positions corresponding to the E-shaped opening shear connectors 3 in the second concrete module wall 2 formwork; and then the prefabricated walls are poured respectively.

[0038] Then, the prefabricated walls are transported to the construction site, the first concrete module wall 1 with the E-shaped opening shear connectors 3 is hoisted to the predetermined position, then the second concrete module wall 2 with the π-shaped opening shear connectors 4 is hoisted to the side of the first concrete module wall 1, then the second concrete module wall 2 is slowly lowered, and after being lowered to the same height, each E-shaped opening shear connector 3 is aligned with the ribbed groove between the corresponding π-shaped opening shear connector 4; all the opening shear connectors are fitted and connected, and the vertical dowel bars 7 are inserted into the through round holes of the rib plates 6, so as to realize the connection between the walls, and the plan view and the side view of the walls after the connection are shown in Fig. 6 and 7 .

[0039] Finally, the strip-shaped wood form 8 is used to pour concrete in the internal cavities between the two side walls, and after the concrete solidifies, the strip-shaped wood form 8 is removed, and the assembly of the adjacent concrete module prefabricated walls is completed.

[0040] The beneficial effects of the present application are as follows:

[0041] 1) The two components of the fitted and combined connector adopt E-shaped and π-shaped structures respectively, have good self-positioning accuracy, so that the alignment error after the rib groove fitting is ≤2mm, the assembly efficiency is improved, and the construction is more convenient;

[0042] 2) The E-shaped opening shear connector and the π-shaped opening shear connector can realize the cooperative transmission of shear force and bending moment through the rib groove cooperation, so as to ensure that the two walls can work cooperatively and improve the overall seismic performance of the building;

[0043] 3) The insertion of the reinforcing rib through the through-hole improves the connection reliability and the transmission capacity of the shear force generated by the superimposed surface.

[0044] The various embodiments are described in the specification by way of progression, each building on the last to facilitate ease of understanding. The same reference numerals are used throughout the drawings and like structure are denoted with like reference numerals.

[0045] The principles and implementations of the present application are described in the specification by using specific examples, and the above description of the examples is only used to help understand the method and core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation and application range will be changed. In view of the above, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A concrete modular wall connecting member based on E- and π-shaped chimeric connectors, characterized in that, Comprise: E-shaped open-hole shear connectors and π-shaped open-hole shear connectors; The E-shaped open-hole shear connectors comprise a square bottom plate and 3 protruding E-shaped rib plates; the π-shaped open-hole shear connectors comprise the square bottom plate and 2 protruding π-shaped rib plates; the E-shaped rib plates and the π-shaped rib plates are provided with 2 symmetrical through-holes; the rib plate spacing between the E-shaped rib plates is the same as the thickness of the π-shaped rib plates, and the rib plate spacing between the π-shaped rib plates is the same as the thickness of the E-shaped rib plates; the 2 E-shaped rib plates are respectively aligned with the edges of the square bottom plate, the E-shaped rib plates are parallel to each other, and the π-shaped rib plates are parallel to each other; the rib plate width of the E-shaped rib plates and the π-shaped rib plates is the same and greater than the internal cavity thickness between the two walls; the E-shaped open-hole shear connectors and the π-shaped open-hole shear connectors are integrally processed and formed.

2. The E- and pi-shaped mortise-tenon connector-based concrete modular wall connecting member according to claim 1, characterized in that, When the E-shaped rib plates and the π-shaped rib plates are spliced, the through-holes of the E-shaped rib plates and the through-holes of the π-shaped rib plates are coaxial holes; the diameter D of the through-holes is less than or equal to the internal cavity thickness and less than or equal to the rib plate width; the diameter D is in the range of 18mm-32mm.

3. The E- and pi-shaped mortise-tenon connector-based concrete modular wall connecting member according to claim 2, characterized in that, The through-holes are connected by vertical reinforcing bars, and the diameter d of the vertical reinforcing bars satisfies the condition 0.8D≤d≤0.9D.

4. The E- and pi-shaped mortise-tenon connector-based concrete modular wall connecting member according to claim 1, characterized in that, The side length of the square bottom plate is in the range of 120mm-260mm, and the distance beyond the maximum spacing of the distribution steel bars of the prefabricated wall is greater than 20mm; the thickness of the square bottom plate is in the range of 8mm-25mm.

5. The E- and pi-shaped mortise-tenon connector-based concrete modular wall connecting member according to claim 1, wherein The rib plate width b satisfies the condition 2t1+b=t0+c1+c2, where t1 is the thickness of the square bottom plate, t0 is the internal cavity thickness, and c1 and c2 are the distances of the distribution steel bars of the two walls to the outer concrete edge; The thickness of the E-shaped rib plates and the π-shaped rib plates is in the range of 6mm-36mm; the rib plate spacing is in the range of 10mm-80mm.

6. An assembly method of a concrete module wall connecting member based on an E-shaped and π-shaped fitting connecting piece, applied to the concrete module wall connecting member based on the E-shaped and π-shaped fitting connecting piece according to any one of claims 1-5, characterized in that, Comprise: Arranging distribution steel bars in the first module wall formwork and the second module wall formwork, respectively, point welding the E-shaped open-hole shear connectors and the π-shaped open-hole shear connectors to the distribution steel bars of the two walls, respectively, and pouring to form a first concrete module wall containing the E-shaped open-hole shear connectors and a second concrete module wall containing the π-shaped open-hole shear connectors; Embedding the E-shaped open-hole shear connectors in the π-shaped open-hole shear connectors to realize splicing of the first concrete module wall and the second concrete module wall; Piercing the vertical reinforcing bars through the through-holes to constrain the relative displacement between the two walls; Using a strip-shaped wooden mold to close the internal cavity between the two walls and pouring concrete.

7. The E-shape and π-shape chimeric connector based concrete modular wall connection member assembly method according to claim 6, wherein, The vertical reinforcing bars use HRB400 grade steel bars.

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