Prefabricated reinforced concrete combined damping column and construction method thereof

Abstract

This invention discloses a prefabricated reinforced concrete composite damping column and its construction method, belonging to the field of architectural structural design and manufacturing technology. It provides a prefabricated reinforced concrete composite damping column and its construction method that significantly improves seismic performance, increases material utilization, facilitates transportation, and enables industrialized construction. The prefabricated reinforced concrete composite damping column includes at least two reinforced concrete column bodies and an energy-dissipating and damping structure. Each reinforced concrete column body is detachably connected into a whole by the energy-dissipating and damping structure extending along its length. During fabrication, the reinforced concrete column bodies, the built-in damping energy-dissipating steel plate, and the damping energy-dissipating steel plate are fabricated separately. Then, the columns are transported to the site and connected into a whole using the built-in damping energy-dissipating steel plate, the damping energy-dissipating steel plate, and fixing bolts to form the prefabricated reinforced concrete composite damping column.

Description

Technical Field

[0001] This invention relates to a reinforced concrete damping column, and more particularly to a prefabricated reinforced concrete composite damping column, belonging to the field of architectural structural design and manufacturing technology. This invention also relates to a construction method for preparing the prefabricated reinforced concrete composite damping column. Background Technology

[0002] Traditional reinforced concrete columns suffer from poor seismic ductility, poor energy dissipation performance, low material utilization, and a tendency to become short columns in high-rise buildings. To address these shortcomings, domestic experts and scholars have proposed new types of columns, such as ordinary reinforced concrete split columns, which improve column ductility to some extent. However, these columns occupy a large space and have low material utilization and industrialization levels. In prefabricated structural systems, the excessively large cross-section of traditional concrete columns hinders transportation and on-site installation. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a prefabricated reinforced concrete composite damping column that can significantly improve seismic performance, increase material utilization, facilitate transportation and industrialized construction, and a construction method for preparing the prefabricated reinforced concrete composite damping column.

[0004] The technical solution adopted to solve the above-mentioned technical problems is: a prefabricated reinforced concrete composite damping column, including at least two reinforced concrete column bodies, and the prefabricated reinforced concrete composite damping column also includes an energy dissipation and vibration reduction damping structure. Each reinforced concrete column body is detachably connected into a whole through the energy dissipation and vibration reduction damping structure extending along the length direction.

[0005] Furthermore, each reinforced concrete column body includes a steel reinforcement cage and precast concrete, with the steel reinforcement cage embedded in the precast concrete.

[0006] The preferred embodiment of the above scheme is that the steel reinforcement cage includes longitudinal steel bars and stirrups. Each longitudinal steel bar embedded in the precast concrete along the length direction is connected into a whole by stirrups. The precast concrete is ordinary strength concrete or high strength concrete.

[0007] Furthermore, the energy-dissipating damping structure includes an internal energy-dissipating damping component and an external energy-dissipating damping component. The external energy-dissipating damping component covers the outside of each reinforced concrete column body, while the internal energy-dissipating damping component is padded between two adjacent reinforced concrete columns along the length direction.

[0008] The preferred embodiment of the above scheme is that the external energy dissipation and damping component includes an external damping energy dissipation component and a covering and fixing component. Fixing holes are provided on each reinforced concrete column body. Each reinforced concrete column body is detachably connected as a whole through the external damping energy dissipation component and the covering and fixing component in cooperation with the fixing holes.

[0009] Furthermore, the external damping energy dissipation component is composed of multiple sets of external damping energy dissipation steel plates, and the covering and fixing components are composed of fixing bolts. Each set of external damping energy dissipation steel plates is provided with multiple rows of energy dissipation strip holes extending along the length direction. Each set of external damping energy dissipation steel plates covers the outside of each reinforced concrete column body in sections through one end of the energy dissipation holes with the cooperation of the corresponding fixing bolts and the corresponding fixing strip holes.

[0010] The preferred embodiment of the above scheme is that the internal energy dissipation damping component includes at least one built-in damping energy dissipation steel plate, each built-in damping energy dissipation steel plate is provided with energy dissipation strip holes extending along the length direction, and each pair of adjacent reinforced concrete column bodies is respectively padded with one built-in damping energy dissipation steel plate.

[0011] Furthermore, a prefabricated reinforced concrete composite damping column includes four reinforced concrete column bodies. The projection of the internal energy dissipation and vibration damping component in its cross-section includes a long built-in damping energy dissipation steel plate and two short built-in damping energy dissipation steel plates. The two short built-in damping energy dissipation steel plates and the long built-in damping energy dissipation steel plate are cross-shaped and padded on the joint surface of the four reinforced concrete column bodies.

[0012] The preferred embodiment of the above scheme is that the shape of the energy dissipation holes is rectangular or rhomboid, and multiple sets of energy dissipation holes are arranged in each external damping energy dissipation steel plate and each internal damping energy dissipation steel plate along the length direction; multiple prefabricated reinforced concrete composite damping columns can be connected into prefabricated reinforced concrete composite damping column units of the required length through external damping energy dissipation steel plates and fixing bolts.

[0013] A construction method for preparing the prefabricated reinforced concrete composite damping column includes the following steps.

[0014] First, according to the actual requirements of the project, the longitudinal steel bars and stirrups are tied into a steel reinforcement cage, then concrete is poured to form the reinforced concrete column body, and finally it is cured for 28 days under standard conditions.

[0015] 2. Ordinary mild steel is drilled and welded according to design requirements to form a built-in damping energy-dissipating steel plate and a damping energy-dissipating steel plate.

[0016] 3. Transport the internal damping energy dissipation steel plate, reinforced concrete column body and external damping energy dissipation steel plate processed in steps 1 and 2 to the construction site. Then connect the internal damping energy dissipation steel plate, reinforced concrete column body and external damping energy dissipation steel plate together with high-strength bolts to form a prefabricated reinforced concrete composite damping column.

[0017] The beneficial effects of this invention are as follows: The technical solution provided in this application is based on at least two existing reinforced concrete column bodies. By adding energy-dissipating and shock-absorbing damping structures, the prefabricated reinforced concrete composite damping column of this application is constructed. Each reinforced concrete column body is detachably connected into a whole by the energy-dissipating and shock-absorbing damping structures extending along the length direction. In the manufacturing process, longitudinal steel bars and stirrups are first tied into a steel skeleton according to the actual requirements of the project. Then, concrete is poured to form the reinforced concrete column body. Finally, it is cured for 28 days under standard conditions. Then, ordinary mild steel is drilled and welded according to the design requirements to form an internal damping energy-dissipating steel plate and an external damping energy-dissipating steel plate. Then, the processed internal damping energy-dissipating steel plate, the reinforced concrete column body and the external damping energy-dissipating steel plate are transported to the construction site. Then, the internal damping energy-dissipating steel plate, the reinforced concrete column body and the external damping energy-dissipating steel plate are connected together by high-strength bolts to form a prefabricated reinforced concrete composite damping column. Thus, the prefabricated reinforced concrete composite damping column of this application adds an energy-dissipating and vibration-damping structure, and the reinforced concrete column body is detachably assembled into a whole through the energy-dissipating and vibration-damping structure. This effectively reduces the cross-sectional area of ​​a single damping column and improves its seismic energy dissipation capacity. At the same time, the prefabricated structure can be easily manufactured in a factory in a standardized manner, and then transported to the site for assembly and use. As a result, the energy-dissipating and vibration-damping composite damping column of this application can significantly improve seismic performance, increase material utilization, facilitate transportation, and realize industrialized construction. Furthermore, since this application improves the energy dissipation and damping structure by setting it into an internal energy dissipation and damping component and an external energy dissipation and damping component, with the external energy dissipation and damping component covering the outside of each reinforced concrete column body and the internal energy dissipation and damping component being padded between two adjacent reinforced concrete columns along the length direction, it can also achieve the following: 1. Full assembly is possible, enabling modular design and assembly, shortening on-site construction time; 2. Dual-stage energy dissipation, with external perforated steel for energy dissipation, followed by perforated soft steel in the middle for energy dissipation, achieving dual-stage yielding and multiple seismic defense lines at the component level; 3. The embedded steel plate can be set with different types of perforations, achieving controllable stiffness and strength. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the prefabricated reinforced concrete composite damping column of the present invention;

[0019] Figure 2This is a three-dimensional structural schematic diagram of the built-in damping energy-dissipating steel plate involved in the prefabricated reinforced concrete composite damping column of the present invention.

[0020] Figure 3 This is a three-dimensional structural diagram of the reinforced concrete column body involved in the prefabricated reinforced concrete composite damping column of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of the steel reinforcement cage involved in the prefabricated reinforced concrete composite damping column of the present invention.

[0022] Figure 5 This is a three-dimensional structural diagram of the external damping energy-dissipating steel plate involved in the prefabricated reinforced concrete composite damping column of the present invention.

[0023] The markings in the diagram are: 1. Reinforced concrete column body; 2. Reinforcing steel cage; 3. Longitudinal reinforcement; 4. Stirrups; 5. External damping energy dissipation steel plate; 6. Fixing bolts; 7. Fixing holes; 8. Energy dissipation strip holes; 9. Internal damping energy dissipation steel plate. Detailed Implementation

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5The invention illustrates a prefabricated reinforced concrete composite damping column that significantly improves seismic performance, increases material utilization, facilitates transportation, and enables industrialized construction, along with a construction method for preparing the prefabricated reinforced concrete composite damping column. The prefabricated reinforced concrete composite damping column comprises at least two reinforced concrete column bodies 1, and further includes an energy-dissipating and vibration-damping structure. Each reinforced concrete column body 1 is detachably connected as a whole through the energy-dissipating and vibration-damping structure extending along its length. The technical solution provided in this application is based on at least two existing reinforced concrete columns. By adding energy-dissipating and damping structures, a prefabricated reinforced concrete composite damping column is constructed. The reinforced concrete columns are detachably connected as a whole through the energy-dissipating and damping structures extending along the length direction. In the manufacturing process, longitudinal steel bars and stirrups are first tied into a steel skeleton according to the actual engineering requirements, and then concrete is poured to form the reinforced concrete column body. Finally, it is cured for 28 days under standard conditions. Then, ordinary mild steel is drilled and welded according to the design requirements to form an internal damping energy-dissipating steel plate and an external damping energy-dissipating steel plate. The processed internal damping energy-dissipating steel plate, reinforced concrete column body, and external damping energy-dissipating steel plate are then transported to the construction site. Finally, the internal damping energy-dissipating steel plate, reinforced concrete column body, and external damping energy-dissipating steel plate are connected together with high-strength bolts to form the prefabricated reinforced concrete composite damping column. Thus, the prefabricated reinforced concrete composite damping column of this application adds an energy-dissipating and vibration-damping structure, and the reinforced concrete column body is detachably assembled into a whole through the energy-dissipating and vibration-damping structure. This effectively reduces the cross-sectional area of ​​a single damping column and improves its seismic energy dissipation capacity. At the same time, the prefabricated structure can be easily manufactured in a factory in a standardized manner, and then transported to the site for assembly and use. As a result, the energy-dissipating and vibration-damping composite damping column of this application can significantly improve seismic performance, increase material utilization, facilitate transportation, and realize industrialized construction.

[0025] Considering the structural characteristics of reinforced concrete columns commonly used in current engineering projects, and in order to make full use of existing technologies and structures, this application reduces the cross-sectional dimensions of a single reinforced concrete column body based on the existing large cross-section. However, the single reinforced concrete column body still structurally includes a steel reinforcement cage 2 and precast concrete, with the steel reinforcement cage 2 embedded within the precast concrete. More specifically, the steel reinforcement cage 2 includes longitudinal steel bars 3 and stirrups 4. The longitudinal steel bars 3 embedded in the precast concrete along the length direction are connected as a whole by the stirrups 4. The precast concrete can be ordinary strength concrete or high strength concrete.

[0026] As a key component of this application's improvement, to facilitate production, manufacturing, and assembly, while maximizing the seismic energy dissipation capacity of the combined damping column, the energy-dissipating and damping structure of this application includes an internal energy-dissipating and damping component and an external energy-dissipating and damping component. The external energy-dissipating and damping component covers the outer side of each reinforced concrete column body 1, while the internal energy-dissipating and damping component is spaced between two adjacent reinforced concrete column bodies 1 along its length. More specifically, the external energy-dissipating and damping component of this application includes an external damping energy-dissipating element and a covering fixing element. Each reinforced concrete column body 1 is provided with a fixing hole 7, and each reinforced concrete column body 1 is detachably connected as a whole through the cooperation of the external damping energy-dissipating element and the covering fixing element in the fixing hole 7. The preferred structure is that the external damping energy dissipation component is composed of multiple sets of external damping energy dissipation steel plates 5, and the covering and fixing components are composed of fixing bolts 6. Each set of external damping energy dissipation steel plates 5 is provided with multiple rows of energy dissipation holes 8 extending along the length direction. Each set of external damping energy dissipation steel plates 5, through one end of the energy dissipation holes 8, is segmentally covered on the outside of each reinforced concrete column body 1 with the cooperation of the corresponding fixing bolts 6 and corresponding fixing holes 7. In this case, the internal energy dissipation and vibration damping assembly includes at least one internal damping energy dissipation steel plate 9. Each internal damping energy dissipation steel plate 9 is provided with energy dissipation holes 8 extending along the length direction, and each pair of adjacent reinforced concrete column bodies 1 is respectively supported by an internal damping energy dissipation steel plate 9. At this time, the shape of the energy dissipation hole 8 can be rectangular, rhomboid or other shapes. The size of the energy dissipation hole 8 can be determined by the form and magnitude of the external load. By setting the energy dissipation hole 8, the effective cross-sectional area of ​​the external damping energy dissipation steel plate 5 can be controlled, thereby achieving the goal of controllable stiffness of the entire prefabricated reinforced concrete composite damping column. The energy dissipation hole 8 divides the external damping energy dissipation steel plate 5 into slender strip columns. The slenderness ratio can be determined by the specific external load value and type to achieve the purpose of controllable strength of the entire prefabricated reinforced concrete composite damping column. During assembly, the external damping energy dissipation steel plate 5 is discontinuously set in segments along the length direction on the outside of the reinforced concrete column body 1. This setting makes the external damping energy dissipation steel plate 5 not bear vertical loads, which can avoid premature yielding and achieve the purpose of full energy dissipation. It works in conjunction with the internal damping energy dissipation steel plate 9, allowing the internal damping energy dissipation steel plate 9 to enter the yielding energy dissipation state first, followed by the external damping energy dissipation steel plate 5 entering the plastic energy dissipation state, and finally the reinforced concrete column body 1 yields, thus achieving multi-stage yielding and realizing multiple seismic defense lines at the component level. In light of the actual engineering situation, the prefabricated reinforced concrete composite damping column of this application includes four reinforced concrete column bodies 1. The projection of the internal energy dissipation and vibration damping component in its cross-section includes a long built-in damping energy dissipation steel plate and two short built-in damping energy dissipation steel plates. The two short built-in damping energy dissipation steel plates and the long built-in damping energy dissipation steel plate are cross-shaped and padded on the joint surface of the four reinforced concrete column bodies 1.Of course, when the cross-section of the composite damping column needs to be rectangular, it can also be composed of two reinforced concrete column bodies 1 or six reinforced concrete column bodies 1. That is, any combination of cross-sectional shapes can be made as needed to achieve different load-bearing capacity requirements. Of course, according to design needs, multiple prefabricated reinforced concrete composite damping columns of this application can also be connected into prefabricated reinforced concrete composite damping column units of the required length through external damping energy dissipation steel plates 5 and fixing bolts 6.

[0027] In summary, the technical solution provided in this application solves the problems of traditional reinforced concrete columns, such as poor seismic ductility, poor energy dissipation performance, low material utilization, and the tendency for short columns in high-rise buildings, large building space occupation, low material utilization, inconvenience in transportation, and low level of construction site and industrialization. The prefabricated reinforced concrete composite damping column of this application has reasonable stress distribution, superior seismic resistance and energy dissipation performance, and is easy to transport and construct. It is suitable for high-rise buildings, wind power generation in high-intensity seismic zones, photovoltaic power generation and other new energy power plants.

[0028] Example 1

[0029] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] An embodiment of the present invention: The structure of a prefabricated reinforced concrete composite damping column comprises three parts: an internal damping energy-dissipating steel plate, a precast reinforced concrete column, and an external damping energy-dissipating steel plate. The internal damping energy-dissipating steel plate is machined from a soft steel plate with holes. The precast reinforced concrete column is cast using traditional methods with longitudinal reinforcing bars, stirrups, and concrete. The external damping energy-dissipating steel plate is also machined from a soft steel plate with holes. The internal damping energy-dissipating steel plate, the precast reinforced concrete column, and the external damping energy-dissipating steel plate are connected together with high-strength bolts to form the prefabricated reinforced concrete composite damping column. The internal damping energy-dissipating steel plate is machined from soft steel with holes; the thickness of the steel plate and the size and shape of the holes are designed and determined according to the actual stress conditions. The precast reinforced concrete column is formed by binding ordinary longitudinal reinforcing bars and stirrups to form a reinforcing steel skeleton, then cast with concrete and pre-drilling a certain number of bolt holes for high-strength bolt connection. The external damping energy-dissipating steel plate can be in the form of a closed frame or a single steel plate can be arranged in the required parts of the column component. Its thickness, the shape and size of the opening are determined by the actual design.

[0031] The method for constructing the above-mentioned prefabricated reinforced concrete composite damping column can be implemented by the following steps:

[0032] 1) First, arrange the longitudinal steel bars and stirrups according to the actual requirements of the project, then form a steel cage by binding, then pour concrete, and finally form a precast reinforced concrete column and cure it for 28 days under standard conditions.

[0033] 2) Ordinary mild steel is processed into built-in damping energy dissipation steel plates and damping energy dissipation steel plates by drilling, welding and other methods according to the actual engineering needs.

[0034] 3) Transport the processed built-in damping energy dissipation steel plate, precast reinforced concrete column and external damping energy dissipation steel plate to the construction site, and then connect the built-in damping energy dissipation steel plate, precast reinforced concrete column and external damping energy dissipation steel plate together with high-strength bolts to form a prefabricated reinforced concrete composite damping column.

[0035] 4) Multiple prefabricated reinforced concrete composite damping column units are connected by external damping energy dissipation steel plates to form prefabricated reinforced concrete composite damping columns of different lengths according to actual engineering needs.

[0036] It should be understood that the above description of specific embodiments of the present invention is only for illustrating the technical approach and features of the present invention, and is intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of the present invention should be covered within the protection scope of the present invention.

Claims

1. A fabricated reinforced concrete composite damper column comprising at least two reinforced concrete column bodies (1), characterized in that: The prefabricated reinforced concrete composite damping column also includes an energy-dissipating and vibration-damping structure. Each reinforced concrete column body (1) is detachably connected as a whole through the energy-dissipating and vibration-damping structure extending along the length direction. The energy-dissipating and damping structure includes an internal energy-dissipating and damping component and an external energy-dissipating and damping component. The external energy-dissipating and damping component covers the outside of each reinforced concrete column body (1), and the internal energy-dissipating and damping component is padded between two adjacent reinforced concrete column bodies (1) along the length direction. The external energy dissipation and damping assembly includes an external damping energy dissipation component and a covering and fixing component. Each reinforced concrete column body (1) is provided with a fixing hole (7). Each reinforced concrete column body (1) is detachably connected as a whole through the cooperation of the external damping energy dissipation component and the covering and fixing component in the fixing hole (7). The external damping energy dissipation component is composed of multiple sets of external damping energy dissipation steel plates (5), and the covering and fixing components are composed of fixing bolts (6). Multiple rows of energy dissipation holes (8) are provided on each set of external damping energy dissipation steel plates (5). Each set of external damping energy dissipation steel plates (5) covers the outside of each reinforced concrete column body (1) in sections along the length direction through one end of the corresponding energy dissipation hole (8) with the cooperation of the corresponding fixing bolts (6) and the corresponding fixing holes (7). The internal energy dissipation damping component includes at least one built-in damping energy dissipation steel plate (9), and each built-in damping energy dissipation steel plate (9) is provided with an energy dissipation hole (8). Each pair of adjacent reinforced concrete column bodies (1) is supported by a built-in damping energy dissipation steel plate (9).

2. The fabricated reinforced concrete composite damper column according to claim 1, wherein: Each reinforced concrete column body includes a steel reinforcement cage (2) and precast concrete, with the steel reinforcement cage (2) embedded in the precast concrete.

3. The fabricated reinforced concrete composite damper column according to claim 2, wherein: The steel reinforcement cage (2) includes longitudinal steel bars (3) and stirrups (4). Each longitudinal steel bar (3) embedded in the precast concrete along the length direction is connected into a whole by stirrups (4). The precast concrete is ordinary strength concrete or high strength concrete.

4. The fabricated reinforced concrete composite damper column according to claim 1, 2 or 3, wherein: A prefabricated reinforced concrete composite damping column includes four reinforced concrete column bodies (1). The projection of the internal energy dissipation and damping component in its cross-section includes a long built-in damping energy dissipation steel plate and two short built-in damping energy dissipation steel plates. The two short built-in damping energy dissipation steel plates and the long built-in damping energy dissipation steel plate are cross-shaped and padded on the joint surface of the four reinforced concrete column bodies (1).

5. The fabricated reinforced concrete composite damper column according to claim 4, wherein: The shape of the energy dissipation hole (8) is rectangular or rhomboid. Along the length direction, there are multiple sets of energy dissipation holes (8) arranged in each external damping energy dissipation steel plate (5) and each internal damping energy dissipation steel plate (9). Multiple prefabricated reinforced concrete composite damping columns can be connected into prefabricated reinforced concrete composite damping column units of the required length through external damping energy dissipation steel plates (5) and fixing bolts (6).

6. A construction method for preparing the fabricated reinforced concrete combined damping column according to claim 5, characterized in that: The construction method includes the following steps: 1) First, tie the longitudinal steel bars (3) and stirrups (4) into a steel reinforcement cage (2) according to the actual requirements of the project, then pour concrete to form the reinforced concrete column body (1), and finally cure it for 28 days under standard conditions. 2) Ordinary mild steel is drilled and welded according to design requirements to form an internal damping energy dissipation steel plate (9) and an external damping energy dissipation steel plate (5). 3) Transport the internal damping energy dissipation steel plate (9), reinforced concrete column body (1) and external damping energy dissipation steel plate (5) processed in steps 1) and 2) to the construction site, and then connect the internal damping energy dissipation steel plate (9), reinforced concrete column body (1) and external damping energy dissipation steel plate (5) together with high-strength bolts to form a prefabricated reinforced concrete composite damping column.

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