Node with ring beam-UHPC prefabricated pipe concrete column and frame structure

Abstract

The invention discloses a joint with a ring beam-UHPC prefabricated pipe concrete column and a frame structure, and belongs to the technical field of building structures, the joint of the concrete column comprises a prefabricated UHPC formwork reinforced concrete frame column, a prefabricated UHPC formwork reinforced concrete frame beam and a prefabricated UHPC formwork reinforced concrete ring beam; each of the prefabricated UHPC formwork reinforced concrete frame columns and the prefabricated UHPC formwork reinforced concrete frame beams comprises a prefabricated UHPC formwork and cast-in-place concrete poured in a hollow structure of the prefabricated UHPC formwork, and a reinforcement cage is embedded in the prefabricated UHPC formwork; the prefabricated UHPC formwork reinforced concrete ring beams are connected with the prefabricated UHPC formwork reinforced concrete frame columns through shear keys, and the prefabricated UHPC formwork reinforced concrete frame beams are connected with the prefabricated UHPC formwork reinforced concrete ring beams through lap joint steel bars. Compared with a traditional concrete frame structure, the prefabricated UHPC formwork reinforced concrete frame structure has the advantages that the bearing capacity, the pressure resistance, the corrosion resistance and the abrasion resistance are remarkably improved, in addition, by means of UHPC, the durability of a building can be improved, and the service life of the building can be prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of building structures, in particular to a node and frame structure of a UHPC prefabricated tubular concrete column with a ring beam. Background Art

[0002] Building industrialization refers to the transformation and upgrading of building products and construction through standardization, mechanization, informatization, intelligence and greening by adopting modern industrialized production methods through technological innovation, management innovation and organizational innovation. It is the main direction of future building development. In recent years, steel structures and prefabricated concrete structures have been rapidly developed and applied due to their obvious advantages in building industrialization. It is true that steel structures and prefabricated concrete structures have many advantages, but the development of building industrialization cannot be limited to this. We also need to develop and promote the industrialization of cast-in-place concrete structure systems. Cast-in-place concrete structures have good seismic resistance, durability and plasticity, but traditional construction methods are usually labor-intensive, have a long construction period, and waste resources more seriously. Therefore, to promote the industrialization of cast-in-place concrete structures, we should fully combine the design concept of building industrialization, vigorously promote the application of "prefabricated cast-in-place concrete technology", realize the standardization and modular design of building structures, and reduce the workload of wet operations on site. In addition, in traditional cast-in-place concrete structures, although ordinary concrete has high compressive strength, its tensile strength is very low. Concrete components are usually in a working state with cracks. When the structure is exposed to acid, alkali, salt and extreme climatic conditions, the steel bars inside the structure are prone to corrosion and freeze-thaw damage, thereby reducing the service life of the structure.

[0003] Ultra-high performance concrete is a cement-based material with excellent performance, which has advantages that ordinary concrete cannot match. First of all, one of the main advantages of UHPC is its extremely high compressive strength, which can usually reach 150 MPa or even higher. Due to its high strength, it can reduce the weight and material consumption of the structure when used in the structure, saving resources while improving the structural stress performance. Secondly, UHPC's resistance to permeability, freeze-thaw resistance and chemical corrosion resistance are also far superior to ordinary concrete, which makes it have a long service life in harsh environments such as oceans, chemical plants, extreme climatic conditions and other places. However, UHPC also has some disadvantages. The first is its high cost. If UHPC completely replaces ordinary concrete, the high cost makes its application in traditional house construction less economical and practical than ordinary concrete, especially in projects with limited budgets. Secondly, UHPC has high construction control requirements, strict production processes and professional technical support, and it is difficult for traditional concrete construction processes to meet the requirements. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a node and frame structure with a ring beam-UHPC prefabricated tubular concrete column. By utilizing ultra-high performance concrete materials, the frame structure has significantly improved bearing capacity, compression resistance, corrosion resistance and wear resistance, which can effectively improve the durability of the building and extend its service life.

[0005] The present invention is achieved through the following technical solutions: A node with a ring beam-UHPC prefabricated tubular concrete column, comprising a prefabricated UHPC formwork reinforced concrete frame column, a prefabricated UHPC formwork reinforced concrete frame beam and a prefabricated UHPC formwork reinforced concrete ring beam; The prefabricated UHPC formwork reinforced concrete frame column and the prefabricated UHPC formwork reinforced concrete frame beam both include a prefabricated UHPC formwork and cast-in-place concrete poured inside the cavity of the prefabricated UHPC formwork, wherein a steel cage is embedded in the prefabricated UHPC formwork; The prefabricated UHPC formwork reinforced concrete ring beam is sleeved on the prefabricated UHPC formwork reinforced concrete frame column and fixedly connected through a shear key, and the prefabricated UHPC formwork reinforced concrete frame beam is connected to the prefabricated UHPC formwork reinforced concrete ring beam through overlapping steel bars.

[0006] Preferably, the prefabricated UHPC formwork reinforced concrete ring beam comprises a prefabricated UHPC ring beam formwork, cast-in-place concrete and a ring beam reinforcement cage; The cast-in-place concrete is poured in the prefabricated UHPC ring beam formwork, the ring beam reinforcement cage is embedded in the cast-in-place concrete, and the reinforcement cage of the prefabricated UHPC formwork reinforced concrete frame beam is connected with the ring beam reinforcement cage through overlapping steel bars.

[0007] Preferably, there are a plurality of shear keys, and the plurality of shear keys are circumferentially spaced apart and arranged on the side wall of the prefabricated UHPC formwork of the prefabricated UHPC formwork reinforced concrete frame column.

[0008] Preferably, the width and height of the shear key are greater than 1 / 5h, where h is the side length of the cross section of the prefabricated UHPC formwork reinforced concrete frame column, and the thickness is equal to the thickness of the prefabricated UHPC formwork of the prefabricated UHPC formwork reinforced concrete frame column.

[0009] Preferably, the prefabricated UHPC formwork reinforced concrete frame column is a rectangular column, and the cross-section of the external prefabricated UHPC formwork is square outside and circular inside, and the cast-in-place concrete is poured in the circular cavity of the prefabricated UHPC column formwork.

[0010] Preferably, the cross-section of the prefabricated UHPC formwork of the prefabricated UHPC formwork reinforced concrete frame beam is U-shaped, and cast-in-place concrete is filled in the prefabricated UHPC formwork of the frame beam.

[0011] Preferably, the ends of the prefabricated UHPC formwork reinforced concrete frame columns are provided with column end steel plates for connecting the upper and lower prefabricated UHPC formwork reinforced concrete frame columns.

[0012] Preferably, the ends of the prefabricated UHPC formwork reinforced concrete frame columns are provided with air-avoiding grooves for installing bolts.

[0013] Preferably, the column end steel plate is connected to the steel cage in the prefabricated UHPC formwork reinforced concrete frame column, and a plurality of bolt holes are arranged on the column end steel plate, and the bolt holes correspond to the positions of the air avoidance grooves.

[0014] A prefabricated UHPC formwork reinforced concrete frame structure, the nodes of which adopt the nodes of the ring beam-UHPC prefabricated tubular concrete column.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: The present application provides a node with a ring beam-UHPC prefabricated tubular concrete column. First, a UHPC formwork with a steel cage is prefabricated in a factory, and then the prefabricated UHPC formwork is transported to the construction site for installation. After the installation is completed, concrete is poured inside the prefabricated UHPC formwork. The factory prefabrication method not only improves the quality and precision of the components, but also reduces the energy consumption and waste of on-site construction. In addition, after the prefabricated UHPC formwork is transported to the construction site, it only needs to be assembled and connected, which eliminates the complicated steel bar binding and formwork disassembly work in the traditional construction process, and significantly shortens the construction period. The beam-column node adopts a ring beam connection, which simplifies the steel bar structure at the traditional node and improves the construction quality; and the double-layer protection at the node (the UHPC formwork of the prefabricated UHPC formwork reinforced concrete frame column and the prefabricated UHPC formwork reinforced concrete ring beam) effectively improves the shear resistance of the node and the seismic performance of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a structural schematic diagram of the framework structure of the present invention; Figure 2 This is a schematic diagram of the prefabricated UHPC formwork reinforced concrete frame column of the present invention; Figure 3 This is a schematic diagram of the prefabricated UHPC formwork reinforced concrete frame beam of the present invention; Figure 4This is a schematic diagram of the prefabricated UHPC formwork reinforced concrete ring beam of the present invention; Figure 5 It is a schematic diagram of the steel bar overlap at the connection between the prefabricated UHPC formwork reinforced concrete ring beam and the prefabricated UHPC formwork reinforced concrete frame beam of the present invention; Figure 6 This is a schematic diagram of the structure of the upper and lower layers of the prefabricated UHPC formwork reinforced concrete frame column of the present invention; In the figure, 1 is a precast UHPC formwork reinforced concrete frame column, 2 is a precast UHPC formwork reinforced concrete frame beam, 3 is a precast UHPC formwork reinforced concrete ring beam, 11 is a precast UHPC column formwork, 12 is cast-in-place concrete, 13 is a shear key, 14 is a column reinforcement cage, 15 is a column end steel plate, 21 is a precast UHPC beam formwork, 22 is cast-in-place concrete, 23 is a beam reinforcement cage, 31 is a precast UHPC ring beam formwork, 32 is cast-in-place concrete, 33 is a ring beam reinforcement cage, and 3301 is a lap reinforcement. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0020] UHPC, the full name of which is Ultra-High Performance Concrete, is a new type of cement-based composite material with ultra-high strength, high toughness, high durability and high density.

[0021] A node with a ring beam-UHPC prefabricated tubular concrete column, comprising a prefabricated UHPC formwork reinforced concrete frame column 1, a prefabricated UHPC formwork reinforced concrete frame beam 2 and a prefabricated UHPC formwork reinforced concrete ring beam 3; The prefabricated UHPC formwork reinforced concrete frame column 1 and the prefabricated UHPC formwork reinforced concrete frame beam 2 both include a prefabricated UHPC column formwork, and cast-in-place concrete filled inside the prefabricated UHPC column formwork, wherein a steel cage is embedded in the prefabricated UHPC column formwork; The prefabricated UHPC formwork reinforced concrete ring beam 3 is fixed on the prefabricated UHPC formwork reinforced concrete frame column 1 through a shear key 13, and the prefabricated UHPC formwork reinforced concrete frame beam 2 is connected to the prefabricated UHPC formwork reinforced concrete ring beam 3 through overlapping steel bars.

[0022] The prefabricated UHPC column formwork of the prefabricated UHPC formwork reinforced concrete frame column 1 and the prefabricated UHPC formwork reinforced concrete frame beam 2 adopts prefabricated forming technology, and the prefabricated UHPC column formwork of the prefabricated UHPC formwork reinforced concrete frame column 1 and the prefabricated UHPC formwork reinforced concrete frame beam 2 are manufactured in advance in the factory, and then the prefabricated UHPC formwork reinforced concrete frame column 1 and the prefabricated UHPC formwork reinforced concrete frame beam 2 are assembled and spliced ​​with the prefabricated UHPC formwork reinforced concrete ring beam 3 at the construction site, which significantly shortens the construction period; at the same time, the prefabricated UHPC formwork reinforced concrete frame column 1, the prefabricated UHPC formwork reinforced concrete frame beam 2 and the prefabricated UHPC formwork reinforced concrete ring beam 3 provide effective constraints on the nodes, improve the shear resistance of the nodes, and thus improve the seismic performance of the overall structure.

[0023] See also Figure 2 The prefabricated UHPC formwork reinforced concrete frame column 1 includes a prefabricated UHPC column formwork 11, cast-in-place concrete 12, a column reinforcement cage 14 and a column end steel plate 15.

[0024] The prefabricated UHPC column formwork 11 is prefabricated with UHPC concrete. The prefabricated UHPC column formwork 11 is a hollow structure. The column reinforcement cage 14 is buried in the prefabricated UHPC column formwork 11. The cast-in-place concrete 12 is poured in the prefabricated UHPC column formwork 11. The column end steel plate 15 is fixed to the end of the column reinforcement cage 14. The column end steel plate 15 is used to connect the upper and lower prefabricated UHPC formwork reinforced concrete frame columns 1.

[0025] When making the prefabricated UHPC column formwork 11, firstly, the bound column inner reinforcement cage 14 is placed in a specific mold, and at the same time, the column end steel plate 15 is welded and fixed to the column reinforcement cage 14, and then UHPC is poured in the mold, and finally the prefabricated UHPC column formwork 11 is formed by a centrifugal process. After the prefabricated UHPC column formwork 11 is formed, high-temperature steam curing can be used to fully ensure the strength and quality of the UHPC formwork. The cast-in-place concrete 12 of the prefabricated UHPC column formwork 11 can adopt ordinary concrete commonly used in existing projects.

[0026] Optionally, the cross-section of the prefabricated UHPC column formwork 11 is square outside and circular inside, and ordinary concrete is cast in the circular cavity.

[0027] Optionally, the cross-sectional dimensions of the column end steel plate are the same as those of the UHPC formwork, and the cross-sectional dimensions are also square outside and circular inside.

[0028] Optionally, the column end steel plate is welded and fixed to the longitudinal reinforcement of the column reinforcement cage 14. The thickness of the column end steel plate should not be less than 10 mm. Bolt holes are provided on the column end steel plate, and the diameter of the bolt holes is not less than the diameter of the longitudinal reinforcement in the prefabricated UHPC formwork reinforced concrete frame column. The spacing between the bolt holes on the column end steel plate should not be greater than 100 mm.

[0029] In some embodiments, the number of the shear keys is multiple, and the multiple shear keys 13 are circumferentially spaced apart on the side wall of the prefabricated UHPC formwork reinforced concrete frame column 1 and form a protruding structure on the side wall.

[0030] Optionally, the shear key 13 is a circular protrusion structure, a polygonal protrusion structure or a rectangular protrusion structure, and the shapes of the plurality of shear keys 13 may be the same or different; preferably, the plurality of shear keys 13 adopt a rectangular protrusion structure.

[0031] Optionally, the shear key is formed together with the prefabricated UHPC column formwork 11. During the manufacturing process, the mold of the prefabricated UHPC column formwork has a plurality of grooves. When the UHPC is poured, the UHPC will flow into the grooves. After the prefabricated UHPC column formwork 11 is formed, a shear key can be formed on each side wall of the prefabricated UHPC column formwork 11.

[0032] It should be noted that a shear groove cooperating with a shear key is formed on the inner wall of the prefabricated UHPC formwork reinforced concrete ring beam 3, and the shear key is arranged in the shear groove, so that the prefabricated UHPC formwork reinforced concrete ring beam 3 and the prefabricated UHPC formwork reinforced concrete frame column form a stable connection.

[0033] Optionally, the shear keys 13 are arranged at four contact surfaces between the precast UHPC column formwork 11 and the precast UHPC formwork reinforced concrete ring beam 3, and their main function is to improve the bonding performance and shear performance of the contact surface between the precast UHPC column formwork 11 and the precast UHPC formwork reinforced concrete ring beam 3.

[0034] Optionally, the width and height of the shear key on the prefabricated UHPC shell reinforced concrete frame column 1 should be greater than 1 / 5 h The thickness should be equal to the thickness of the prefabricated UHPC column formwork.

[0035] See also Figure 3 The prefabricated UHPC formwork reinforced concrete frame beam 2 includes a prefabricated UHPC beam formwork 21, cast-in-place concrete 22 and a beam reinforcement cage 23. The prefabricated UHPC beam formwork 21 is a hollow structure. The beam reinforcement cage 23 is buried in the side wall of the prefabricated UHPC beam formwork 21. The concrete 22 is poured into the prefabricated UHPC beam formwork 21 by cast-in-place.

[0036] When manufacturing the prefabricated UHPC formwork reinforced concrete frame beam 2, first put the tied beam reinforcement cage 23 into the mold, and then cast the UHPC to form the prefabricated UHPC beam form 21. In addition, during the manufacturing process, the end of the beam reinforcement cage 23 is flush with the end of the prefabricated UHPC beam form 21, which can facilitate the hoisting and transportation of the form. Concrete 22 is poured in the prefabricated UHPC beam form 21, and ordinary concrete commonly used in existing projects can be used.

[0037] Optionally, the cross-section of the prefabricated UHPC beam formwork 21 is "U"-shaped, and ordinary concrete is cast in the formwork.

[0038] See also Figure 4 The prefabricated UHPC formwork reinforced concrete ring beam 3 includes a prefabricated UHPC ring beam formwork 31, cast-in-place concrete 32 and a ring beam reinforcement cage 33; the concrete 32 is cast in the prefabricated UHPC ring beam formwork 31, and the ring beam reinforcement cage 33 is embedded in the concrete 32.

[0039] The prefabricated UHPC ring beam formwork 31 is a hollow ring structure, and the ring beam reinforcement cage 33 is arranged in the hollow ring structure of the prefabricated UHPC ring beam formwork 31. Concrete is cast in the prefabricated UHPC ring beam formwork 31, and the prefabricated UHPC formwork reinforced concrete ring beam 3 is formed after solidification.

[0040] It should be noted that there is no steel cage in the prefabricated UHPC formwork reinforced concrete ring beam formwork 31, and the prefabricated UHPC ring beam formwork 31 is only composed of UHPC. The ring beam steel cage 33 in the prefabricated UHPC formwork reinforced concrete ring beam 3 is tied at the construction site, and after the tying is completed, it is placed in the prefabricated UHPC ring beam formwork 31, and then the concrete 32 is cast in the prefabricated UHPC ring beam formwork.

[0041] In some embodiments, the prefabricated UHPC formwork reinforced concrete ring beam 3 and the prefabricated UHPC formwork reinforced concrete frame beam are connected by overlapping steel bars 3301.

[0042] See also Figure 5 The diameter of the lap steel bar 3301 should be the same as the steel bar diameter of the precast UHPC shell reinforced concrete frame beam. In addition, the anchorage length of the lap steel bar 3301 in the precast UHPC shell reinforced concrete ring beam 3 and the precast UHPC shell reinforced concrete frame beam 2 can be arranged according to the requirements of the current specifications.

[0043] In some embodiments, the end of the prefabricated UHPC formwork reinforced concrete frame column is provided with an air avoidance groove for installing bolts. The air avoidance groove is formed on the end surface side wall of the prefabricated UHPC column formwork, and the air avoidance groove is an operating space for installing bolts.

[0044] See also Figure 6When the prefabricated UHPC column formwork 11 is produced in the factory, an air avoidance groove is provided at the end of the column. The number and position of the air avoidance groove are the same as the bolt holes to facilitate the installation of the bolts. The cross-sectional size of the air avoidance groove should be at least larger than the cross-sectional size of the bolt nut, and the height should not be less than 50mm. After the lower-layer prefabricated UHPC formwork reinforced concrete frame column 1 is cast, the prefabricated UHPC column formwork 11 of the upper-layer prefabricated UHPC formwork reinforced concrete frame column 1 is aligned with the prefabricated UHPC column formwork 11 of the lower layer, and connected through the column end steel plate 15 at the end of the prefabricated UHPC column formwork. When connecting, use bolts to fix the upper-layer prefabricated UHPC column formwork 11. The diameter of the bolts should be at least equal to the diameter of the longitudinal reinforcement in the column, and the spacing between the two bolts should not be greater than 100mm.

[0045] Optionally, the cross-sectional dimension of the air avoidance groove should be at least larger than the cross-sectional dimension of the bolt and nut, and the height should not be less than 50 mm.

[0046] The node of the concrete column of the present application is provided with a shear key at the connection between the precast UHPC formwork reinforced concrete frame column and the precast UHPC formwork reinforced concrete ring beam, which is used to improve the bonding performance and shear performance of the joint surface between the precast UHPC formwork reinforced concrete frame column and the precast UHPC formwork reinforced concrete ring beam. The joint between the precast UHPC formwork reinforced concrete ring beam and the precast UHPC formwork reinforced concrete frame beam is provided with lap steel bars, and then ordinary concrete is poured to form a complete beam-column node.

[0047] See also Figure 1 Based on the above-mentioned node of the UHPC prefabricated tubular concrete column with a ring beam, the present application also provides a prefabricated UHPC formwork reinforced concrete frame structure accordingly. The node of the frame structure includes a prefabricated UHPC formwork reinforced concrete frame column 1, a prefabricated UHPC formwork reinforced concrete frame beam 2 and a prefabricated UHPC formwork reinforced concrete ring beam 3. The prefabricated UHPC formwork reinforced concrete ring beam 3 is sleeved on the prefabricated UHPC formwork reinforced concrete frame column 1 and fixed by a shear key. The prefabricated UHPC formwork reinforced concrete frame beam 2 is connected to the prefabricated UHPC formwork reinforced concrete ring beam 3 by overlapping steel bars, and the prefabricated UHPC formwork reinforced concrete frame columns 1 at two adjacent nodes above and below are connected by multiple bolts.

[0048] The node with ring beam-UHPC prefabricated tubular concrete column has the following beneficial technical effects: 1. Due to the use of prefabrication technology, UHPC formwork can be produced in advance in the factory, and only assembly and connection are required during on-site construction. Compared with cast-in-place concrete structures, the quality and precision of prefabricated components are significantly higher. In addition, since UHPC formwork is prefabricated in the factory, it can reduce energy consumption and waste generation during on-site construction, improve material utilization, and meet the trend of energy conservation and environmental protection in modern buildings.

[0049] 2. The steel cage is arranged inside the UHPC formwork, and complicated steel bar binding work is no longer required during on-site construction. In addition, when pouring the core concrete, the UHPC formwork can be used as a building template, and it does not need to be disassembled after the concrete hardens, so the construction period can be significantly shortened.

[0050] 3. Due to the higher strength of UHPC, the size of the components can be appropriately reduced, further improving the utilization efficiency of the building space. In addition, the reduction in structural size means that the overall structure has a lighter weight, which can reduce the burden on the foundation and support system.

[0051] 4. Since the steel skeletons of beams and columns are arranged inside the UHPC formwork, and the beam-column nodes are connected by ring beams, the complex steel bar structure at the traditional concrete beam-column nodes can be avoided, thereby improving the construction quality at the nodes.

[0052] 5. Compared with the traditional concrete frame structure, the prefabricated UHPC column formwork concrete frame structure has two layers of protection at the nodes. One is the UHPC formwork of the column, and the other is the UHPC formwork reinforced concrete ring beam. Both can provide effective constraints on the nodes, thereby improving the shear resistance of the nodes and further improving the seismic performance of the overall structure.

[0053] The present invention proposes a frame structure with a ring beam-UHPC prefabricated tubular concrete column. The prefabricated UHPC formwork part of the frame structure adopts prefabrication technology and can be produced in the factory, and only needs to be assembled on site. In addition, the use of prefabricated UHPC formwork can reduce on-site construction procedures, especially the installation and disassembly procedures of traditional building formwork. This reduces labor costs and speeds up construction progress. The high density of UHPC materials reduces the impact on the environment, and its long service life reduces the maintenance and repair costs of buildings. At the same time, prefabricated construction can reduce the disturbance of the environment caused by on-site construction. In addition, by using ultra-high performance concrete materials, the frame structure has a significant improvement in bearing capacity, compression resistance, corrosion resistance and wear resistance, which can effectively improve the durability of the building and extend its service life.

[0054] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A node with a ring beam and a UHPC prefabricated tubular concrete column, characterized in that: It comprises a prefabricated UHPC formwork reinforced concrete frame column (1), a prefabricated UHPC formwork reinforced concrete frame beam (2) and a prefabricated UHPC formwork reinforced concrete ring beam (3); The prefabricated UHPC formwork reinforced concrete frame column (1) and the prefabricated UHPC formwork reinforced concrete frame beam (2) both comprise a prefabricated UHPC formwork and cast-in-place concrete poured inside the cavity of the prefabricated UHPC formwork, wherein a steel cage is embedded in the prefabricated UHPC formwork; The prefabricated UHPC formwork reinforced concrete ring beam (3) is sleeved on the prefabricated UHPC formwork reinforced concrete frame column (1) and fixedly connected via a shear key; the prefabricated UHPC formwork reinforced concrete frame beam (2) is connected to the prefabricated UHPC formwork reinforced concrete ring beam (3) via lap steel bars (3301).

2. A node of a UHPC prefabricated tubular concrete column with a ring beam according to claim 1, characterized in that: The prefabricated UHPC formwork reinforced concrete ring beam (3) comprises a prefabricated UHPC ring beam formwork (31), cast-in-place concrete and a ring beam reinforcement cage (33); The cast-in-place concrete is poured into the prefabricated UHPC ring beam formwork (31), the ring beam reinforcement cage (33) is embedded in the cast-in-place concrete (32), and the reinforcement cage of the prefabricated UHPC formwork reinforced concrete frame beam (2) is connected to the ring beam reinforcement cage (33) via overlapping reinforcement bars.

3. A node of a UHPC prefabricated tubular concrete column with a ring beam according to claim 1, characterized in that: The number of the shear keys is multiple, and the multiple shear keys are arranged circumferentially at intervals on the side wall of the prefabricated UHPC formwork of the prefabricated UHPC formwork reinforced concrete frame column (1).

4. A node of a UHPC prefabricated tubular concrete column with a ring beam according to claim 3, characterized in that: The width and height of the shear key are greater than 1 / 5h, where h is the side length of the cross section of the prefabricated UHPC formwork reinforced concrete frame column (1), and the thickness is equal to the thickness of the prefabricated UHPC formwork of the prefabricated UHPC formwork reinforced concrete frame column (1).

5. The node of the UHPC prefabricated tubular concrete column with ring beam according to claim 1, characterized in that: The prefabricated UHPC formwork reinforced concrete frame column (1) is a rectangular column, the cross section of the external prefabricated UHPC formwork of which is square outside and circular inside, and cast-in-place concrete is poured in the circular cavity of the prefabricated UHPC column formwork.

6. The node of the UHPC prefabricated tubular concrete column with ring beam according to claim 1, characterized in that: The cross section of the prefabricated UHPC formwork reinforced concrete frame beam (2) is U-shaped, and cast-in-place concrete is filled in the prefabricated UHPC formwork of the frame beam.

7. The node of the UHPC prefabricated tubular concrete column with ring beam according to claim 1, characterized in that: The end of the prefabricated UHPC formwork reinforced concrete frame column (1) is provided with a column end steel plate for connecting the upper and lower prefabricated UHPC formwork reinforced concrete frame columns (1).

8. A node of a UHPC prefabricated tubular concrete column with a ring beam according to claim 7, characterized in that: The end of the prefabricated UHPC formwork reinforced concrete frame column (1) is provided with a clearance groove for installing bolts.

9. A node of a UHPC prefabricated tubular concrete column with a ring beam according to claim 8, characterized in that: The column end steel plate is connected to the steel cage in the prefabricated UHPC formwork reinforced concrete frame column (1), and a plurality of bolt holes are arranged on the column end steel plate, wherein the bolt holes correspond to the positions of the air avoidance grooves.

10. A prefabricated UHPC formwork reinforced concrete frame structure, characterized in that: The nodes of the frame structure adopt the nodes of the UHPC prefabricated tubular concrete columns with ring beams as described in any one of claims 1 to 9.

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