ECC semi-prefabricated shell regenerated brick-concrete aggregate concrete column with recoverable function

Abstract

The invention discloses a function-recoverable ECC semi-prefabricated shell regenerated brick-concrete composite column, the function-recoverable ECC semi-prefabricated shell regenerated brick-concrete composite column comprises a reinforcement cage, a template and a PVC pipe, the reinforcement cage comprises an annular shell, ultrahigh-strength longitudinal reinforcements and transverse reinforcements, the device is characterized in that through holes which are in an annular array and matched with the ultrahigh-strength longitudinal steel bars are formed in the top of the annular shell and penetrate through the bottom of a column body of the annular shell, and fastening assemblies which are distributed in an annular array and matched with the ultrahigh-strength longitudinal steel bars and the through holes are arranged on the bottom wall of an inner cavity of the annular shell; according to the device, the recoverable function of the combined column body can be enhanced, the stress performance of recycled aggregate concrete is effectively improved, reasonable utilization of construction waste is achieved on the technical path, and the problems that natural aggregate is in shortage and the prefabricating period of a reinforcement cage is long are solved.

Description

Technical Field

[0001] The invention relates to the technical field of structural engineering, in particular to a functionally recoverable ECC semi-prefabricated shell recycled brick-mixed aggregate concrete composite column and a manufacturing method thereof. Background Art

[0002] Buildings are the basic carriers of cities, and their earthquake resistance is directly related to the stability of urban functions. However, traditional building structures are difficult to meet the requirements of earthquake resistance in the current urbanization process, and new technologies are needed to improve the toughness of structures. The core of earthquake-resistant and tough structures is the recoverable function, so earthquake-resistant and tough structures are also called recoverable functional structures. The purpose of recoverable functional structures is to make the structural components and non-structural components of the building structure basically intact or slightly damaged under certain earthquake effects, and to quickly restore their use functions without repair or with a little repair. On this basis, the patent of this invention uses the longer elastic section of ultra-high-strength steel bars to ensure that the lateral resistance of the structure will not be significantly reduced in the case of large displacement. While selecting high-strength steel for engineering structures, the reasonable matching and use of high-ductility concrete can achieve the purpose of optimizing design and reducing construction costs. High-ductility cement-based composite materials are a new type of cement-based composite materials "designed" with the goal of ultra-high ductility and limiting crack development, which can provide elastic-plastic strain hardening behavior similar to steel and higher energy dissipation capacity. It can work better with ultra-high-strength steel bars.

[0003] Recycled concrete, with the development of old residential area renovation, shantytown renovation, rural village and town merger and other projects, most of the demolished buildings are brick-concrete structures. The coarse aggregates processed by crushing these brick-concrete structures contain a large amount of broken bricks, broken tiles and low-strength concrete, referred to as recycled brick-concrete aggregates. The concrete made of this aggregate is called recycled brick-concrete aggregate concrete. It can not only solve the problem of shortage of natural aggregate resources and protect the ecological environment of the aggregate production area, but also solve the problems of urban waste stacking, land occupation and environmental pollution. It has significant social, economic and environmental benefits. Therefore, recycled brick-concrete aggregate concrete technology is considered to be an effective measure to improve the recycling rate of construction waste.

[0004] Columns are the main vertical load-bearing components in high-rise buildings. Nowadays, the pollution problem on construction sites is becoming increasingly prominent. Semi-prefabricated structures have gradually become the focus of scholars' research because they can greatly reduce wet operations on site and reduce dust. Semi-prefabricated concrete columns are composed of two parts: a prefabricated shell and a core cast-in-place concrete. The factory prefabrication method is conducive to the development of building industrialization, while improving construction efficiency and concrete pouring quality. The prefabricated shell can serve as a core concrete template and also play a restraining role on the core concrete. After on-site hoisting and positioning, the core concrete is poured into the prefabricated shell and finally cured and formed. This type of construction method is conducive to reducing on-site wet operations, improving construction efficiency, and improving the integrity of the structure, achieving seismic performance similar to that of the overall cast-in-place structure.

[0005] Publication No. CN114991386A proposes a high-seismic reinforced concrete column with main reinforcement anchorage, including: ultra-high strength steel bars, stirrups, steel sleeves, annular steel plates, high-pressure nuts, high-pressure nut gaskets and concrete layers; the ultra-high strength steel bars are connected through steel sleeves and high-pressure nuts and annular steel plates, the ultra-high strength steel bars are combined to form a steel cage and are radially tied and fixed through stirrups, high-pressure nut gaskets are set between the steel sleeve annular steel plate and the high-pressure nut, and the whole is poured with concrete. The present invention uses ultra-high strength steel bars with low bonding strength with concrete as main bars. In order to give full play to the high strength and high resilience of the steel bars in the elastic domain, the main bars are now disconnected in the middle of the column, and the upper and lower sections of the main bars are combined and fixed with sleeves and annular steel plates. The main bars at the ends of the column are connected with high-pressure nuts and annular steel plates to form an anchoring system, and then concrete is poured to form a column component.

[0006] During the prefabrication process of the steel cage, workers are required to tighten the high-pressure nuts one by one. However, the gaps between the ultra-high-strength steel bars are limited, making it inconvenient to use electric tools. They then need to be tightened manually, which prolongs the production cycle, reduces production efficiency, and affects the construction progress.

[0007] In summary, a functionally recoverable ECC semi-prefabricated shell recycled brick-concrete aggregate concrete composite column is proposed, which can save consumables and shorten the prefabrication period of the steel cage. Summary of the invention

[0008] 1. Technical issues to be resolved

[0009] In view of the shortcomings of the prior art, the present invention provides a restorable ECC semi-prefabricated shell recycled brick-concrete aggregate concrete composite column and a manufacturing method thereof, which has the advantages of restorable function, saving consumables and shortening the prefabrication period of the steel cage, and solves the problems of shortage of natural aggregate resources, stacking of demolition waste, land occupation and environmental pollution, and long prefabrication period of the steel cage.

[0010] (II) Technical solution

[0011] The technical solution of the present invention to solve the above technical problems is as follows: a functionally restorable ECC semi-prefabricated shell recycled brick-concrete aggregate concrete composite column, comprising a steel cage, a formwork and a PVC pipe, the steel cage comprising an annular shell, ultra-high-strength longitudinal steel bars and transverse steel bars, the top of the annular shell is provided with through holes in an annular array and penetrating to its bottom and adapted to the ultra-high-strength longitudinal steel bars, the inner cavity bottom wall of the annular shell is provided with fastening components distributed in an annular array and adapted to the ultra-high-strength longitudinal steel bars and the through holes, the inner cavity top wall of the annular shell is rotatably connected with a sleeve slidably connected to the fastening component, the outer side of the sleeve is fixedly connected with a gear cylinder, the inner cavity side wall of the annular shell is provided with a transmission component meshed with the gear cylinder, the inside of the annular shell is rotatably connected with a bolt head worm extending to its front side and meshing with the transmission component, and the outer side of the ultra-high-strength longitudinal steel bars is sleeved with transverse steel bars distributed at equal distances in the longitudinal direction.

[0012] The beneficial effects of the present invention are:

[0013] The recoverable functional ECC semi-prefabricated shell recycled brick-concrete aggregate concrete composite column passes the ultra-high-strength longitudinal steel bars through the through holes in turn through the fastening components, and the bolt head worm is rotated by an electric wrench, thereby driving the transmission component to rotate in the annular shell. Since the transmission component and the gear cylinder are meshed, the sleeve is driven to rotate synchronously, and the fastening components are driven to rotate synchronously, so that the fastening components are tightly fitted to the outer sides of the corresponding ultra-high-strength longitudinal steel bars, the annular shell and the ultra-high-strength longitudinal steel bars are fixedly connected, and the transverse steel bars are tied to the outer sides of the ultra-high-strength longitudinal steel bars by wire, so that the prefabrication of the steel cage can be completed, which has the advantages of greatly reducing the time used for tightening the high-pressure nuts in turn, thereby shortening the prefabrication period of the steel cage.

[0014] Based on the above technical solution, the present invention can also be improved as follows.

[0015] Further, the fastening assembly includes a conical tightening cylinder, a shrinkage groove and a conical compression cylinder, the inner cavity bottom wall of the annular shell is fixedly connected with a conical tightening cylinder distributed in an annular array and adapted to the ultra-high-strength longitudinal steel bars and the through holes, the outer side of the conical tightening cylinder is provided with a shrinkage groove distributed in an annular array and extending to the top thereof, and the outer side of the conical tightening cylinder is threadedly connected with a conical compression cylinder slidably connected to the corresponding sleeve;

[0016] Furthermore, the transmission assembly includes an inner gear ring and an outer worm wheel ring. The inner cavity side wall of the annular shell is rotatably connected to the inner gear ring meshing with the gear cylinder, and the outer side of the inner gear ring is fixedly connected to the outer worm wheel ring meshing with the bolt head worm.

[0017] The beneficial effect of adopting the above further scheme is that the bolt head worm is rotated by an electric wrench, and the bolt head worm is meshed with the outer worm wheel ring, and then driven by the internal gear ring, and because the internal gear ring and the gear tube are meshed, the sleeve is driven to rotate synchronously, and the sleeve drives the conical compression tube to rotate. The force generated by the rotation of the thread causes the conical compression tubes to move downward at the same time, and the conical compression tube slides downward in the sleeve, and the conical compression tube causes the shrinkage groove on the outside of the conical tightening tube to deform, and then the inner side of the upper end of the conical tightening tube gradually fits tightly with the outer side of the ultra-high-strength longitudinal steel bar, so that the ultra-high-strength longitudinal steel bar and the annular shell can be fixedly connected at the same time, which greatly shortens the time required compared to the traditional method of tightening the high-pressure nuts one by one.

[0018] The present invention also provides a method for manufacturing a functionally restorable ECC semi-prefabricated shell recycled brick-mixed aggregate concrete composite column, comprising the following steps:

[0019] Step S1: prefabricate the steel cage in the factory, and insert the prefabricated steel cage into the foundation for anchoring;

[0020] Step S2: placing a formwork outside the steel cage and fixing it thereto;

[0021] Step S3: placing a PVC pipe inside the steel cage and fixing it to the steel cage;

[0022] Step S4: pouring high-ductility cement-based composite material between the PVC pipe and the formwork and curing it according to regulations;

[0023] Step S5: until the high-ductility cement-based composite material between the PVC pipe and the template is dried to meet the demolding strength, the PVC pipe is pulled out, and the template is separated from the high-ductility cement-based composite material to form a cavity inside, that is, the ECC semi-prefabricated shell is completed;

[0024] Step S6: transport the ECC semi-prefabricated shell to the construction site, bury its base in the foundation, and then pour recycled brick-concrete aggregate concrete in the central cavity of the ECC semi-prefabricated shell, and maintain it in accordance with regulations to form a restorable functional ECC semi-prefabricated shell recycled brick-concrete aggregate concrete composite column.

[0025] The method for making the restorable functional ECC semi-prefabricated shell recycled brick-concrete aggregate concrete composite column has a high-ductility cement-based composite material that can provide elastic-plastic strain hardening behavior similar to that of steel and a higher energy consumption capacity, and can work better with ultra-high-strength steel bars. Casting recycled brick-concrete aggregate concrete in the cavity can solve the problem of shortage of natural aggregate resources, protect the ecological environment of the aggregate production area, and solve the problems of stacking, land occupation and environmental pollution of demolition waste, and has significant social, economic and environmental benefits. The prefabricated shell can be used as a core concrete template and also play a restraining role on the core concrete. The use of this type of construction method is conducive to reducing on-site wet operations, improving construction efficiency, and at the same time improving the integrity of the structure, achieving the advantages of seismic performance similar to that of the overall cast-in-place structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the steel cage structure of the present invention;

[0028] Figure 3 It is a cross-sectional view of the annular shell structure of the present invention;

[0029] Figure 4 It is a partial cross-sectional view of the annular housing of the present invention from top view;

[0030] Figure 5 It is a top view of the conical tightening tube structure of the present invention;

[0031] Figure 6 This is an enlarged schematic diagram of the structure at a of the present invention;

[0032] Figure 7 This is an enlarged schematic diagram of the structure at position b of the present invention;

[0033] Figure 8 This is an enlarged schematic diagram of the structure at c of the present invention.

[0034] In the figure: 1. steel cage; 2. formwork; 3. PVC pipe; 4. annular shell; 5. ultra-high strength longitudinal steel bars; 6. transverse steel bars; 7. through hole; 8. fastening assembly; 801. conical tightening cylinder; 802. shrinkage groove; 803. conical compression cylinder; 9. sleeve; 10. gear cylinder; 11. transmission assembly; 111. internal gear ring; 112. external worm wheel ring; 12. bolt head worm. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1, by Figure 1-8 Provided is a functionally restorable ECC semi-prefabricated shell recycled brick-concrete aggregate concrete composite column, the invention comprises a steel cage 1, a formwork 2 and a PVC pipe 3, the steel cage 1 comprises an annular shell 4, ultra-high-strength longitudinal steel bars 5 and transverse steel bars 6, the top of the annular shell 4 is provided with through holes 7 which are arranged in an annular array and penetrate to its bottom and are adapted to the ultra-high-strength longitudinal steel bars 5, the inner cavity bottom wall of the annular shell 4 is provided with fastening components 8 which are distributed in an annular array and are adapted to the ultra-high-strength longitudinal steel bars 5 and the through holes 7, the inner cavity top wall of the annular shell 4 is rotatably connected with a sleeve 9 which is slidably connected with the fastening component 8, the outer side of the sleeve 9 is fixedly connected with a gear cylinder 10, the inner cavity side wall of the annular shell 4 is provided with a transmission component 11 which is meshed with the gear cylinder 10, the inner side wall of the annular shell 4 is rotatably connected with a bolt head worm 12 which extends to its front side and meshes with the transmission component 11, and the outer side of the ultra-high-strength longitudinal steel bars 5 is sleeved with transverse steel bars 6 which are distributed in the longitudinal direction at equal distances;

[0037] The fastening assembly 8 includes a conical tightening cylinder 801, a shrinkage groove 802 and a conical compression cylinder 803. The inner cavity bottom wall of the annular shell 4 is fixedly connected with a conical tightening cylinder 801 distributed in an annular array and adapted to the ultra-high-strength longitudinal steel bar 5 and the through hole 7. The outer side of the conical tightening cylinder 801 is provided with a shrinkage groove 802 distributed in an annular array and extending to the top thereof. The outer side of the conical tightening cylinder 801 is threadedly connected with a conical compression cylinder 803 slidably connected to the corresponding sleeve 9.

[0038] The transmission assembly 11 includes an inner gear ring 111 and an outer worm wheel ring 112. The inner cavity side wall of the annular housing 4 is rotatably connected to the inner gear ring 111 meshing with the gear cylinder 10. The outer side of the inner gear ring 111 is fixedly connected to the outer side of the outer worm wheel ring 112 meshing with the bolt head worm 12.

[0039] The bolt head worm 12 is rotated by an electric wrench. Since the bolt head worm 12 is meshed with the outer worm wheel ring 112, it is driven by the internal gear ring 111. Since the internal gear ring 111 is meshed with the gear tube 10, the sleeve 9 is driven to rotate synchronously. The sleeve 9 drives the conical pressing tube 803 to rotate. The force generated by the rotation of the thread causes the conical pressing tube 803 to move downward at the same time. At the same time, the conical pressing tube 803 slides downward in the sleeve 9. The conical pressing tube 803 causes the shrinkage groove 802 on the outside of the conical tightening tube 801 to deform, and then the inner side of the upper end of the conical tightening tube 801 gradually fits tightly with the outer side of the ultra-high strength longitudinal steel bar 5, so that the ultra-high strength longitudinal steel bar 5 and the annular shell 4 can be fixedly connected at the same time, which greatly shortens the time required compared to the traditional method of tightening the high-pressure nuts in sequence.

[0040] Embodiment 2, based on embodiment 1, a method for manufacturing a functionally restorable ECC semi-prefabricated shell recycled brick-mixed aggregate concrete composite column comprises the following steps:

[0041] Step S1: prefabricate the steel cage 1 in the factory, and insert the prefabricated steel cage 1 into the foundation for anchoring;

[0042] Step S2: placing a template 2 outside the steel cage 1 and fixing it thereto;

[0043] Step S3: placing the PVC pipe 3 inside the steel cage 1 and fixing it to the steel cage 1;

[0044] Step S4: pouring high-ductility cement-based composite material between the PVC pipe 3 and the formwork 2 and curing it according to regulations;

[0045] Step S5: until the high-ductility cement-based composite material between the PVC tube 3 and the template 2 is dried to meet the demolding strength, the PVC tube 3 is pulled out, and the template 2 is separated from the high-ductility cement-based composite material to form a cavity inside, that is, the ECC semi-prefabricated shell is completed;

[0046] Step S6: transport the ECC semi-prefabricated shell to the construction site, bury its base in the foundation, and then pour recycled brick-concrete aggregate concrete in the central cavity of the ECC semi-prefabricated shell, and maintain it in accordance with regulations to form a restorable functional ECC semi-prefabricated shell recycled brick-concrete aggregate concrete composite column.

[0047] The method for making the restorable functional ECC semi-prefabricated shell recycled brick-concrete aggregate concrete composite column has a high-ductility cement-based composite material that can provide elastic-plastic strain hardening behavior similar to that of steel and a higher energy consumption capacity, and can work better with ultra-high-strength steel bars. Casting recycled brick-concrete aggregate concrete in the cavity can solve the problem of shortage of natural aggregate resources, protect the ecological environment of the aggregate production area, and solve the problems of stacking, land occupation and environmental pollution of demolition waste, and has significant social, economic and environmental benefits. The prefabricated shell can be used as a core concrete template and also play a restraining role on the core concrete. The use of this type of construction method is conducive to reducing on-site wet operations, improving construction efficiency, and at the same time improving the integrity of the structure, achieving the advantages of seismic performance similar to that of the overall cast-in-place structure.

[0048] Working principle:

[0049] The first step to implement the innovation point:

[0050] Step 1: Pass the ultra-high strength longitudinal steel bars 5 through the through holes 7 in sequence through the conical tightening cylinder 801, and rotate the bolt head worm 12 with an electric wrench;

[0051] Step 2: Since the bolt head worm 12 is meshed with the outer worm wheel ring 112, and then driven by the inner gear ring 111, and since the inner gear ring 111 is meshed with the gear cylinder 10, the sleeve 9 is driven to rotate synchronously, and the sleeve 9 drives the conical pressing cylinder 803 to rotate. The force generated by the rotation of the thread causes the conical pressing cylinder 803 to move downward at the same time. At the same time, the conical pressing cylinder 803 slides downward in the sleeve 9, and the conical pressing cylinder 803 causes the shrinkage groove 802 on the outer side of the conical tightening cylinder 801 to deform, and then the inner side of the upper end of the conical tightening cylinder 801 gradually fits tightly with the outer side of the ultra-high-strength longitudinal steel bar 5, so that the ultra-high-strength longitudinal steel bar 5 and the annular shell 4 can be fixedly connected at the same time;

[0052] Step 3: The transverse reinforcement 6 is tied to the outer side of the ultra-high-strength longitudinal reinforcement 5 by wire, and the prefabrication of the reinforcement cage 1 is completed, which has the advantage of greatly reducing the time used to tighten the high-pressure nuts in sequence, thereby shortening the reinforcement cage prefabrication period.

[0053] The second innovation point implementation steps:

[0054] Step 1: prefabricate the steel cage 1 in the factory, insert the prefabricated steel cage 1 into the foundation and anchor it, place the template 2 outside the steel cage 1 and fix it to it, place the PVC pipe 3 inside the steel cage 1 and fix it to the steel cage 1;

[0055] Step 2: pour high-ductility cement-based composite material between the PVC pipe 3 and the formwork 2 and cure it according to regulations until the high-ductility cement-based composite material between the PVC pipe 3 and the formwork 2 is dried to meet the demolding strength, and then the PVC pipe 3 is pulled out, and the formwork 2 is separated from the high-ductility cement-based composite material to form a cavity inside, thus completing the ECC semi-prefabricated shell;

[0056] Step 3: Transport the ECC semi-prefabricated shell to the construction site, bury its foundation into the foundation, and then pour recycled brick-concrete aggregate concrete in the central cavity of the ECC semi-prefabricated shell, and maintain it in accordance with regulations to form a restorable functional ECC semi-prefabricated shell recycled brick-concrete aggregate concrete composite column.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A functionally restorable ECC semi-prefabricated shell recycled brick-concrete aggregate concrete column, comprising a steel cage (1), a formwork (2) and a PVC pipe (3); a steel cage (1) is arranged inside the formwork (2), and a PVC pipe (3) is arranged in the middle of the steel cage (1); a high-ductility cement-based composite material is filled between the steel cage (1) and the formwork (2); and the interior of the PVC pipe (3) is filled with recycled brick-concrete aggregate concrete; The steel cage (1) comprises an annular shell (4), ultra-high-strength longitudinal steel bars (5) and transverse steel bars (6); Features: The top of the annular shell (4) is provided with through holes (7) in an annular array and extending to the bottom thereof and adapted to the ultra-high-strength longitudinal steel bars (5); the inner cavity bottom wall of the annular shell (4) is provided with fastening components (8) distributed in an annular array and adapted to the ultra-high-strength longitudinal steel bars (5) and the through holes (7); the inner cavity top wall of the annular shell (4) is rotatably connected to a sleeve (9) slidably connected to the fastening component (8); the outer side of the sleeve (9) is fixedly connected to a gear cylinder (10); the inner cavity side wall of the annular shell (4) is provided with a transmission component (11) meshing with the gear cylinder (10); the inside of the annular shell (4) is rotatably connected to a bolt head worm (12) extending to the front side thereof and meshing with the transmission component (11); the outer side of the ultra-high-strength longitudinal steel bars (5) is sleeved with transverse steel bars (6) distributed in a longitudinal equidistant manner.

2. The functionally restorable ECC semi-prefabricated shell recycled brick-mixed aggregate concrete column according to claim 1 is characterized by: The fastening assembly (8) comprises a conical tightening cylinder (801), a shrinkage groove (802) and a conical compression cylinder (803); the inner cavity bottom wall of the annular shell (4) is fixedly connected with a conical tightening cylinder (801) distributed in an annular array and adapted to the ultra-high-strength longitudinal steel bars (5) and the through hole (7); the outer side of the conical tightening cylinder (801) is provided with shrinkage grooves (802) distributed in an annular array and extending to the top thereof; the outer side of the conical tightening cylinder (801) is threadedly connected with a conical compression cylinder (803) slidably connected to the corresponding sleeve (9).

3. The functionally restorable ECC semi-prefabricated shell recycled brick-mixed aggregate concrete column according to claim 1 is characterized by: The transmission assembly (11) comprises an inner gear ring (111) and an outer worm wheel ring (112); the inner cavity side wall of the annular housing (4) is rotatably connected to the inner gear ring (111) meshing with the gear cylinder (10); the outer side of the inner gear ring (111) is fixedly connected to the outer side of the inner gear ring (112) meshing with the bolt head worm (12).

4. A method for manufacturing a semi-prefabricated ECC shell recycled brick-mixed aggregate concrete column with recoverable function as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: Step S1: prefabricate the steel cage (1) in a factory, and insert the prefabricated steel cage (1) into the foundation for anchoring; Step S2: placing a template (2) outside the steel cage (1) and fixing it thereto; Step S3: placing a PVC pipe (3) inside the steel cage (1) and fixing it to the steel cage (1); Step S4: pouring high-ductility cement-based composite material between the PVC pipe (3) and the formwork (2) and curing it according to regulations; Step S5: until the high-ductility cement-based composite material between the PVC tube (3) and the template (2) is dried to meet the demolding strength, the PVC tube (3) is pulled out, and the template (2) is separated from the high-ductility cement-based composite material to form a cavity inside, thus completing the ECC semi-prefabricated shell; Step S6: transport the ECC semi-prefabricated shell to the construction site, bury its base in the foundation, and then pour recycled brick-concrete aggregate concrete in the central cavity of the ECC semi-prefabricated shell, and maintain it in accordance with regulations to form a restorable functional ECC semi-prefabricated shell recycled brick-concrete aggregate concrete composite column.

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