Steel-concrete column and prestressed steel-concrete beam large-span frame structure

Abstract

The invention discloses a steel-concrete column and prestressed steel-concrete beam large-span frame structure which is characterized in that a prefabricated column is arranged, the prefabricated column is made of a steel pipe-steel reinforced concrete column, the prefabricated column is composed of a cross beam section and a vertical section, the cross beam section comprises a column framework and an outer flange, and concrete is poured for forming; the prefabricated prestressed beam comprises a beam framework and an inner flange, the prefabricated column and the prefabricated beam are connected through a flange plate and a high-strength bolt, a PVC corrugated pipe is arranged in the column beam, and the prestressed tendon has various structural forms. Connection is reliable and stable, and structural integrity is guaranteed; in a large-span building, the structure can effectively solve the problems of self weight and crack resistance of a traditional reinforced concrete structure and the problem of high cost of the traditional reinforced concrete structure, can meet the requirements of the large-span building for the space without stand columns and the beam column bearing capacity, and has wide application prospects.

Description

Technical Field

[0001] The invention relates to the field of construction engineering, in particular to a dry connection frame structure. Background Art

[0002] In the field of modern architecture, the development of large-span building structures faces many challenges and opportunities. Large-span buildings usually refer to buildings that span more than 30 meters, such as stadiums, auditoriums, exhibition halls and other public and industrial buildings. Their functional requirements determine that columns are not allowed in the space, which places extremely high demands on the bearing capacity of beams, columns and connection nodes.

[0003] Traditional reinforced concrete structures have the defects of poor crack resistance and heavy weight due to the inherent characteristics of concrete and steel. When the structure span is large, the performance of the component can be improved by increasing the cross-sectional area and the number of steel bars, but the deadweight of the concrete component will cause a large deflection of the component, which not only affects the performance of the building, but also causes material waste and low economic benefits.

[0004] The emergence of prestressed concrete structures provides a good solution for large-span buildings. Prestressed concrete can effectively reduce the cross-sectional area of ​​beams. While meeting the structural strength requirements, it also has good economy, aesthetics and space utilization, making it one of the ideal choices for large-span beam structure design. However, prestressed concrete structures require the use of high-quality prestressed tendons, such as high-strength steel wires, steel strands, etc. The prices of these materials are relatively high compared to ordinary steel bars. At the same time, in order to ensure the performance of the structure, the quality requirements for concrete are also relatively high, and high-strength grade concrete is usually required, which also increases the material cost. For example, in the comparison between ordinary reinforced concrete beams and prestressed concrete beams of the same span, the material cost of prestressed concrete beams may be higher than that of ordinary reinforced concrete beams due to the use of higher-priced prestressed tendons and high-performance concrete, and labor costs will also increase accordingly. Summary of the invention

[0005] In order to solve the above problems, the present invention discloses a large-span frame structure of steel-concrete columns and prestressed steel-concrete beams.

[0006] The specific technical solutions are as follows:

[0007] A large-span frame structure of steel-concrete columns and prestressed steel-concrete beams, wherein the material of the prefabricated columns is a steel tube-steel concrete column, a prefabricated prestressed beam is arranged on one side of the prefabricated column, and the prefabricated column and the prefabricated beam are vertically connected and connected together through a flange.

[0008] The prefabricated column is composed of a crossbeam section and a vertical section. A column skeleton and an outer flange are arranged in the crossbeam section. The prefabricated column is formed after pouring concrete of the vertical section and the crossbeam section. The column skeleton includes steel sections.

[0009] The prefabricated prestressed beam comprises a beam skeleton and an inner flange. The beam skeleton comprises prestressed tendons. The beam skeleton forms a prefabricated beam after pouring concrete.

[0010] In the column frame, the steel section and the longitudinal reinforcement and stirrups around the steel section are tied together to form the column frame, and the outer flange is welded to the embedded anchor bars inside the column frame at the end of the cross beam section to form a whole.

[0011] In the beam frame, the prestressed tendons and the longitudinal reinforcements and stirrups around the prestressed tendons are tied together to form a beam frame. The inner flange is set at the end of the prefabricated beam and corresponds to the outer flange. The embedded anchor bars are set in the beam frame and fixed and welded to the inner flange to form a whole.

[0012] The outer flange and the inner flange are connected together by high-strength bolts.

[0013] The prefabricated column also includes a PVC corrugated pipe arranged in the prefabricated column.

[0014] The prefabricated prestressed beam also includes a PVC corrugated pipe reserved in the prefabricated beam or directly tensioning prestressed tendons.

[0015] The structural form of the prestressed tendons is:

[0016] a) Column end curve tensioning:

[0017] The prestressed tendons start from the precast beam, pass through the PVC corrugated pipe in the precast column, and are connected to the inside of the precast column in a curved form;

[0018] b) Linear tensioning at column end:

[0019] The prestressed tendons start from the precast beam, pass through the PVC corrugated pipe in the precast column, and are connected to the inside of the precast column in a straight line;

[0020] c) Beam internal curve tensioning:

[0021] The prestressed tendons are arranged in the precast beam and extend in a curved form from the bottom end to the upper end of the precast beam;

[0022] d) Mixed tension at column end:

[0023] The prestressed tendons are arranged in the precast beam and extend from the bottom to the upper end of the precast beam in a curved form. Another set of prestressed tendons starts from the precast beam, passes through the PVC corrugated pipe in the precast column, and is connected to the inside of the precast column in a straight line.

[0024] e) Beam end curve tensioning:

[0025] The prestressed tendons start from the precast beam, are connected to the precast beam in a straight line, and extend upward in a curve inside the PVC corrugated tube in the precast beam.

[0026] The advantages of the present invention are: convenient and efficient construction, no need for on-site wet operations (such as pouring concrete connections, etc.), reliable and stable connections, reduced production costs, and reduced labor input on the construction site. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 for Figure 1 2-2 section view;

[0029] Figure 3 for Figure 1 1-1 cross-sectional view;

[0030] Figure 4 This is a schematic diagram of flange connection;

[0031] Figure 5 for Figure 4 2-2 cross-sectional view;

[0032] Figure 6 for Figure 4 3-3 cross-sectional view;

[0033] Figure 7 This is a schematic diagram of the column end curve tensioning;

[0034] Figure 8 This is a schematic diagram of the straight line tensioning of the column end;

[0035] Fig. 9 This is a schematic diagram of the tensioning of the inner curve of the beam;

[0036] Fig.10 This is a schematic diagram of mixed tensioning at the column end;

[0037] Fig.11 Schematic diagram of curve tensioning at beam end. DETAILED DESCRIPTION

[0038] 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.

[0039] A large-span frame structure of steel-concrete columns and prestressed steel-concrete beams, wherein the material of the precast column 1 is a steel tube-steel concrete column, a precast prestressed beam 2 is arranged on one side of the precast column 1, and the precast column 1 and the precast beam 2 are vertically connected and connected together by a flange 3.

[0040] The prefabricated column 1 is composed of a cross beam section 1a and a vertical section 1b. A column skeleton 1c and an outer flange 31 are provided in the cross beam section 1a. The prefabricated column 1 is formed after pouring concrete 8 of the vertical section 1b and the cross beam section 1a. The column skeleton 1c includes steel sections 6.

[0041] The precast beam 2 includes a beam skeleton 2 a and an inner flange 32 . The beam skeleton 2 a includes prestressed tendons 7 . The prestressed beam skeleton 2 a forms the precast beam 2 after concrete 8 is poured.

[0042] In the column skeleton 1c, the steel section 6 and the longitudinal reinforcement and stirrups around the steel section 6 are tied together to form the column skeleton 1c. The outer flange 31 is welded to the embedded anchor bar 5 inside the column skeleton at the end of the cross beam section to form a whole. The steel section 6 is included in the column skeleton, which enhances the overall bearing capacity of the prefabricated column 1.

[0043] In the prestressed beam skeleton 2a, the prestressed tendons 7 are tied together with the longitudinal beam bars and stirrups around the prestressed tendons to form the beam skeleton 2a. The inner flange 32 is arranged at the end of the prefabricated beam and corresponds to the outer flange 31. The embedded anchor bar 5 is arranged in the beam skeleton and fixedly welded to the inner flange to form a whole.

[0044] The outer flange and the inner flange are connected together by high-strength bolts 4 .

[0045] The prefabricated column 1 also includes a PVC corrugated pipe 9 provided in the prefabricated column to reserve a channel for subsequent operations such as threading prestressed tendons.

[0046] The prefabricated prestressed beam also includes a PVC corrugated tube 9 reserved in the prefabricated beam or directly tensioning prestressed tendons.

[0047] The structural form of the prestressed tendons is:

[0048] a) Column end curve tensioning:

[0049] The prestressed tendons start from the precast beam, pass through the PVC corrugated pipe in the precast column, and are connected to the inside of the precast column in a curved form;

[0050] b) Linear tensioning at column end:

[0051] The prestressed tendons start from the precast beam, pass through the PVC corrugated pipe in the precast column, and are connected to the inside of the precast column in a straight line;

[0052] c) Beam internal curve tensioning:

[0053] The prestressed tendons are arranged in the precast beam and extend in a curved form from the bottom end to the upper end of the precast beam;

[0054] d) Mixed tension at column end:

[0055] The prestressed tendons are arranged in the precast beam and extend from the bottom to the upper end of the precast beam in a curved form. Another set of prestressed tendons starts from the precast beam, passes through the PVC corrugated pipe in the precast column, and is connected to the inside of the precast column in a straight line.

[0056] e) Beam end curve tensioning:

[0057] The prestressed tendons start from the precast beam, are connected to the precast beam in a straight line, and extend upward in a curve inside the PVC corrugated tube in the precast beam.

[0058] The working principle of the present invention is:

[0059] Field assembly connection:

[0060] The prefabricated columns and beams are hoisted to the designated location, and the outer flange and inner flange are connected together by high-strength bolts to realize the connection of the prefabricated columns and beams, forming the basic skeleton of the frame structure. This connection method is a dry connection, which is convenient and efficient in construction, does not require on-site wet work (such as pouring concrete connection, etc.), and the connection is reliable and stable.

[0061] In the case of prestressed tendons, the prestressed tendons are tensioned through the PVC corrugated tubes reserved in the beams and columns to generate pre-compressive stress in the structure. During the tensioning process, the arrangement and tensioning paths of the prestressed tendons in the prefabricated beams and columns are different according to the different structural forms of the prestressed tendons, so that the entire structure is in a favorable stress state before bearing the load, improving the mechanical properties of the structure such as bearing capacity and crack resistance, and at the same time making the various parts of the structure work together to bear the external load together.

[0062] Principle of structural performance improvement:

[0063] The steel tube-steel concrete column and the prestressed concrete beam bear the load synergistically.

[0064] In the steel tube-steel concrete column, the steel and concrete work together. The steel bears part of the load, improving the bearing capacity of the column. At the same time, the concrete restrains the steel, preventing its local buckling and enhancing the stability of the column. When bearing vertical loads, the concrete mainly bears the pressure, while the steel can better resist possible bending moments.

[0065] Prestressed concrete beams effectively control the development of concrete cracks and improve the crack resistance of beams through the compressive stress pre-applied by prestressed tendons. When the beam is subjected to vertical loads, the tensile stress generated by the load first offsets the pre-compressive stress, reducing the actual tensile stress of the beam, thereby delaying the appearance of cracks and improving the durability of the structure. At the same time, the presence of prestress increases the stiffness of the beam during normal use, reduces the deformation of the beam, and improves the overall performance of the structure.

[0066] The overall structure works together:

[0067] In the entire frame structure, precast columns and precast beams are reliably connected through flanges and high-strength bolts, and the prestressed tendons make the structure a whole. Under the action of horizontal loads (such as wind loads, earthquake loads, etc.), the bending deformation of the components resists the horizontal force, and the components work together to transfer and distribute the load. The stiffness and bearing capacity of the precast columns provide vertical support for the structure, and the precast beams mainly bear the floor load and transfer it to the columns. The entire structural system can effectively transfer various loads to the foundation, ensuring the safety and stability of the structure under different working conditions.

[0068] Through the above working principle, the steel-concrete column-beam large-span frame structure achieves the advantages of convenient construction, reliable connection, and excellent structural performance, and can meet the requirements of large-span buildings for space and bearing capacity.

Claims

1. A long-span frame structure of steel-concrete columns and prestressed steel-concrete beams, characterized in that: A prefabricated column is provided, the material of the prefabricated column is a steel tube-steel concrete column, a prefabricated prestressed beam is provided on one side of the prefabricated column, the prefabricated column and the prefabricated prestressed beam are vertically connected and connected together through a flange. The prefabricated column is composed of a cross beam section and a vertical section, a column skeleton and an outer flange are arranged in the cross beam section, and the prefabricated column is formed after pouring concrete of the vertical section and the cross beam section, the column skeleton includes steel sections, and the vertical section is composed of a steel pipe; The prefabricated prestressed beam comprises a beam skeleton and an inner flange. The beam skeleton comprises prestressed tendons. The beam skeleton forms a prefabricated beam after pouring concrete.

2. The long-span frame structure of steel-concrete columns and prestressed steel-concrete beams according to claim 1 is characterized in that: In the column frame, the steel section and the longitudinal reinforcement and stirrups around the steel section are tied together to form the column frame, and the outer flange is welded to the embedded anchor bars inside the column frame at the end of the cross beam section to form a whole.

3. The long-span frame structure of steel-concrete columns and prestressed steel-concrete beams according to claim 1 is characterized in that: In the beam frame, the prestressed tendons and the longitudinal reinforcements and stirrups around the prestressed tendons are tied together to form a beam frame. The inner flange is set at the end of the prefabricated beam and corresponds to the outer flange. The embedded anchor bars are set in the beam frame and fixed and welded to the inner flange to form a whole.

4. The long-span frame structure of steel-concrete columns and prestressed steel-concrete beams according to claim 1 is characterized in that: The outer flange and the inner flange are connected together by high-strength bolts.

5. The long-span frame structure of steel-concrete columns and prestressed steel-concrete beams according to claim 1 is characterized in that: The prefabricated column also includes a PVC corrugated pipe arranged in the prefabricated column.

6. The long-span frame structure of steel-concrete columns and prestressed steel-concrete beams according to claim 1 is characterized in that: The prefabricated beam also includes a PVC corrugated pipe reserved in the prefabricated beam or directly tensioning prestressed tendons.

7. The long-span frame structure of steel-concrete columns and prestressed steel-concrete beams according to claim 6 is characterized in that: The structural form of the tensioned prestressed tendons is: a) Column end curve tensioning: The prestressed tendons start from the precast beam, pass through the PVC corrugated pipe in the precast column, and are connected to the inside of the precast column in a curved form; b) Linear tensioning at column end: The prestressed tendons start from the precast beam, pass through the PVC corrugated pipe in the precast column, and are connected to the inside of the precast column in a straight line; c) Beam internal curve tensioning: The prestressed tendons are arranged in the precast beam and extend in a curved form from the bottom end to the upper end of the precast beam; d) Mixed tension at column end: The prestressed tendons are arranged in the precast beam and extend from the bottom to the upper end of the precast beam in a curved form. Another set of prestressed tendons starts from the precast beam, passes through the PVC corrugated pipe in the precast column, and is connected to the inside of the precast column in a straight line. e) Beam end curve tensioning: The prestressed tendons start from the precast beam, are connected to the precast beam in a straight line, and extend upward in a curve inside the PVC corrugated tube in the precast beam.

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