Combined structure of height difference concrete beam and steel pipe concrete column ring beam and construction method

Abstract

The invention discloses a combined structure of a height difference concrete beam and a steel pipe concrete column ring beam and a construction method.The combined structure comprises a circular steel pipe concrete column, an integrally-machined ring beam and a variable-height-difference concrete frame beam, the circular steel pipe concrete column comprises a circular steel pipe and self-compacting concrete, and the circular steel pipe is filled with the self-compacting concrete; two reinforcing outer ring plates which are vertically distributed at intervals are fixedly welded to the outer periphery of the circular steel pipe, the ring beam is fixedly connected with the reinforcing outer ring plates, and one end of the concrete frame beam is fixedly connected with the ring beam. According to the combined structure, the height or thickness of the component can be flexibly adjusted according to actual loads and topographic conditions, and the combined structure adapts to various complex working conditions; the stress state of the component can be optimized by changing the height or thickness, and the overall performance of the structure is improved; the component size can be reduced at the part with smaller stress, and the material and the construction cost are saved; complex load distribution and topographic conditions can be effectively adapted, and the bearing capacity and the anti-seismic property of the structure are improved.

Description

Technical Field

[0001] This invention belongs to the field of building engineering technology, and in particular relates to a combined structure and construction method of a concrete beam with elevation difference and a steel tube concrete column ring beam. Background Technology

[0002] The increasing construction of high-rise buildings and large public facilities has placed higher demands on structural design and construction technology. In particular, the combination of concrete structures and concrete-filled steel tubular columns (gravity columns) in structural systems is becoming increasingly widespread.

[0003] The combined application of concrete structures and steel-concrete composite columns allows the height or thickness of components to vary at different locations. This structural form can reduce component size in areas with lower stress, saving materials and reducing costs. While meeting the building's load-bearing capacity requirements, this structural form can not only effectively improve the building's load-bearing capacity and seismic performance, but also optimize space utilization.

[0004] Currently, the traditional methods and approaches for combining concrete structures with concrete-filled steel tubular columns have the following problems:

[0005] 1. The joint between the concrete beam with elevation difference and the circular steel tube concrete column ring beam is complex, and traditional construction methods are difficult to guarantee construction quality and accuracy.

[0006] 2. Differences in material properties: Concrete and steel have significant differences in material properties. How to effectively combine the two materials during construction to ensure the integrity and stability of the structure is a technical challenge.

[0007] 3. Low construction efficiency: Traditional construction methods often require multiple procedures, which take a long time and affect the overall construction progress.

[0008] 4. Difficulty in quality control: Due to the numerous construction stages and quality control points, traditional methods are insufficient to achieve full-process quality monitoring.

[0009] 5. High difficulty in concrete pouring: Concrete pouring in the sections of the elevation difference beam and the ring beam is difficult and is prone to quality defects such as honeycomb and pitting. Summary of the Invention

[0010] The purpose of this invention is to provide a combined structure and construction method of a concrete beam with elevation difference and a steel tube concrete column ring beam, which can ensure the construction quality of the combined structure and improve construction efficiency.

[0011] This invention is implemented as follows: a combined structure of a concrete beam with elevation difference and a steel tube concrete column ring beam, including a circular steel tube concrete column, an integrally fabricated ring beam, and a concrete frame beam with varying elevation difference. The circular steel tube concrete column includes a circular steel tube and self-compacting concrete filled inside the circular steel tube. Two reinforcing outer ring plates are fixedly welded to the outer periphery of the circular steel tube at intervals. The ring beam is fixedly connected to the reinforcing outer ring plates. One end of the concrete frame beam is fixedly connected to the ring beam.

[0012] In some implementations, the ring beam includes a ring beam reinforcement frame, which includes stirrups, ring beam web reinforcement, tie bars, top main reinforcement, and bottom main reinforcement. The stirrups are vertically arranged around the outer perimeter of the steel-concrete composite column, and the ring beam web reinforcement is horizontally arranged around the outer perimeter of the steel-concrete composite column and tied to the stirrups. Two layers of ring beam web reinforcement, separated by an inner and outer layer, are connected by the tie bars. The top main reinforcement is horizontally arranged at the top of the ring beam and tied to the stirrups. The bottom main reinforcement is horizontally arranged at the bottom of the ring beam and tied to the stirrups.

[0013] In some implementations, the stirrups include a first stirrup and a second stirrup, the width of the second stirrup is less than the width of the first stirrup, the length of the second stirrup is greater than the length of the first stirrup, the second stirrup is located at the outer end of the first stirrup and forms a step opening at the inner bottom position, and the reinforcing outer ring plate extends into the step opening.

[0014] In some implementations, the concrete frame beam includes longitudinal reinforcement, stirrups, and web reinforcement. The longitudinal reinforcement at the top and bottom is tied to the top and bottom ends of the stirrups, and the web reinforcement is tied to the stirrups.

[0015] In some implementations, the inner ends of the longitudinal reinforcement bars of the beam extend into the ring beam and are bent near the steel-concrete composite column to form a longitudinal reinforcement bar bend anchor.

[0016] To achieve the above-mentioned objectives, the present invention also provides a construction method for the above-mentioned combined structure, the method comprising the following steps:

[0017] The round steel tube concrete columns are fabricated in the factory and then transported to the site.

[0018] Position the steel-concrete composite column according to the design drawings. After hoisting, connect the round steel-concrete composite column to the foundation and ensure its safety and stability.

[0019] According to the design height, the reinforcing outer ring plate is processed in the factory. According to the structural calculation, the stiffening plates are welded at equal intervals. The reinforcing outer ring plate and the round steel tube of the round steel tube concrete column adopt a first-class fillet weld.

[0020] Based on the drawings of the concrete frame beam with varying height, the ring beam steel reinforcement frame is fabricated according to the dimensions. The ring beam steel reinforcement frame is first fabricated as a whole in the steel reinforcement processing plant.

[0021] The location for processing the ring beam is reserved in the steel bar processing plant. The scaffolding is erected first, and the processing of the ring beam steel bar frame is completed through the scaffolding.

[0022] The bottom main reinforcement of the ring beam is placed at the bottom of the frame, and the top main reinforcement of the ring beam is placed on the frame. The bottom main reinforcement and the top main reinforcement of the ring beam are anchored together.

[0023] All reinforcing bars are welded together in accordance with the specifications. The main reinforcing bars at the bottom of the ring beam, the web reinforcing bars of the ring beam, and the main reinforcing bars at the top of the ring beam are placed at the location of the ring beam and tied to the stirrups.

[0024] The waist reinforcement of the ring beam is tied to the stirrups at equal intervals, and the tie bars are tied at equal intervals according to the drawing. The tie bar connection is a tying connection.

[0025] After the ring beam reinforcement frame is processed, it is hoisted to the elevation of the round steel pipe concrete column by tower crane. The concrete frame beam is then fabricated on site. First, the beam stirrups of the concrete frame beam are placed at the formwork, and concrete protective layer spacers are placed under the beam stirrups and beam longitudinal reinforcement. At the same time, the beam longitudinal reinforcement and beam stirrups are tied and connected, and the beam web reinforcement is tied. Then, tie hook reinforcement is set at equal intervals.

[0026] The longitudinal reinforcement of the beam is set according to the magnitude of the structural stress. The longitudinal reinforcement of the upper and lower parts of the concrete frame beam is bent and anchored near the circular steel tube concrete column, and anchored according to the specifications. It is placed tightly against the circular steel tube concrete column and tied.

[0027] After the steel reinforcement is completed, the formwork is reinforced and concrete is poured.

[0028] Furthermore, the above method also includes the following steps:

[0029] The first stirrup is made into two U-shaped stirrups during the forming process, and then the two U-shaped stirrups are tied on site.

[0030] Furthermore, the diameters of the main reinforcement bars at the top and bottom of the ring beam are equal to the diameters of the longitudinal reinforcement bars of the beam; the distance between the stirrups at the outer ring plate and the circular steel tube concrete column is equal to the concrete cover thickness.

[0031] The combined structure and construction method of the concrete beam with elevation difference and the steel-concrete composite column ring beam provided by this invention have the following advantages compared with the prior art:

[0032] Improve construction efficiency: The integrated construction method can reduce the number of steps and processes in the construction process, thereby increasing construction speed and efficiency.

[0033] Enhanced structural stability: The integrated structure of concrete frame beams with varying elevation differences, circular steel tube concrete columns, and ring beams can better transfer and distribute loads, improving the stability and load-bearing capacity of the entire structure.

[0034] Improving structural seismic performance: Integrated structural design can effectively improve the seismic performance of buildings and reduce the damage caused by earthquakes.

[0035] Construction safety: Integrated construction can reduce the complexity of the construction site and reduce safety hazards during the construction process.

[0036] Save on material costs: Reduce the size of components in areas with less stress to save on material and construction costs. Attached Figure Description

[0037] Figure 1 This is a three-dimensional structural diagram of a combined structure of a concrete beam with elevation difference and a steel-concrete composite column ring beam provided in an embodiment of the present invention;

[0038] Figure 2 yes Figure 1 A top view of the combined structure shown;

[0039] Figure 3 yes Figure 1 A cross-sectional schematic diagram of the combined structure shown. Detailed Implementation

[0040] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0041] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] Please see Figure 1 and Figure 2 This embodiment illustrates a combined structure of a concrete beam with elevation difference and a steel tube concrete column ring beam, including a circular steel tube concrete column 1, an integrally fabricated ring beam 2, and a concrete frame beam with varying elevation difference 3. The circular steel tube concrete column 1 includes a circular steel tube 11 and self-compacting concrete filled within the circular steel tube 12. Two reinforcing outer ring plates 13, spaced vertically, are fixedly welded to the outer periphery of the circular steel tube 11. The ring beam 2 is fixedly connected to the reinforcing outer ring plates 13, and one end of the concrete frame beam 3 is fixedly connected to the ring beam 2.

[0044] For details, please refer to Figure 3 The ring beam 2 includes a ring beam reinforcement frame, which includes stirrups 21, ring beam web reinforcement 22, tie bars 23, top main reinforcement 24, and bottom main reinforcement 25. The stirrups 21 are vertically positioned around the outer perimeter of the steel-concrete composite column 1, and the ring beam web reinforcement 22 is horizontally positioned around the outer perimeter of the steel-concrete composite column 1 and tied to the stirrups 21. Two layers of ring beam web reinforcement 22, separated by an inner and outer layer, are connected by tie bars 23. The top main reinforcement 24 is horizontally positioned at the top of the ring beam 2 and tied to the stirrups 21. The bottom main reinforcement 25 is horizontally positioned at the bottom of the ring beam 2 and tied to the stirrups 21.

[0045] Furthermore, the stirrup 21 includes a first stirrup 21a and a second stirrup 21b. The width of the second stirrup 21b is smaller than the width of the first stirrup 21a, and the length of the second stirrup 21b is greater than the length of the first stirrup 21a. The second stirrup 21b is located at the outer end of the first stirrup 21a and forms a step opening at the bottom of the inner side, and the reinforcing outer ring plate 12 extends into the step opening.

[0046] The concrete frame beam 3 includes longitudinal reinforcement 31, stirrups 32 and web reinforcement 33. The longitudinal reinforcement 31 at the top and bottom is tied to the top and bottom of the stirrups 32, and the web reinforcement 33 is tied to the stirrups 32.

[0047] The inner end of the longitudinal reinforcement 31 extends into the ring beam 2 and is bent near the steel-concrete composite column 1 to form the longitudinal reinforcement bent anchor 311.

[0048] This embodiment also provides a construction method for the above-mentioned combined structure, including the following steps:

[0049] After the circular steel tube concrete column 1 is processed in the factory, it is transported to the site.

[0050] Position the steel-concrete composite column 1 according to the design drawings. After hoisting, connect the round steel-concrete composite column 1 to the foundation and ensure its safety and stability.

[0051] According to the design height, the reinforcing outer ring plate 13 is processed in the factory, and the stiffening plate 14 is welded at equal intervals according to the structural calculation. The reinforcing outer ring plate 13 and the round steel pipe of the round steel pipe concrete column 1 adopt a first-level fillet weld.

[0052] Based on the drawings of the concrete frame beam with varying height difference, the ring beam steel reinforcement frame is fabricated according to the dimensions. The ring beam steel reinforcement frame is first fabricated as a whole in the steel reinforcement processing plant.

[0053] The location for processing ring beam 2 is reserved in the steel bar processing plant. The frame is erected first, and the processing of the ring beam steel bar frame is completed through the frame.

[0054] The bottom main reinforcement 25 of the ring beam is placed at the bottom of the frame, and the top main reinforcement 24 of the ring beam is placed on the frame. The bottom main reinforcement 25 and the top main reinforcement 24 of the ring beam are anchored together.

[0055] All reinforcing bars are welded and connected according to specifications. The main reinforcing bars 25 at the bottom of the ring beam, the web reinforcing bars 22, and the main reinforcing bars 24 at the top of the ring beam are placed at the location of the ring beam 2 and tied to the stirrups 21. Among them, since the spacing of the circular beam stirrups 32 is relatively close during the tying process, if the first stirrup 21a on the inner side of the ring beam 2 is made as a whole, it will be inconvenient to carry out the tying construction of the circular beam stirrups 32. In order to ensure the design and construction performance requirements of the steel-concrete composite column ring beam joint, the first stirrup 21a is made into two U-shaped stirrups during the forming process, and then the two U-shaped stirrups are tied on site.

[0056] The waist reinforcement 22 of the ring beam is tied to the stirrups 21 at equal intervals, and the tie bars 26 are tied at equal intervals as shown in the figure. The tie bars 26 are connected by tying.

[0057] Among them, the diameter of the main reinforcement 24 at the top of the ring beam and the main reinforcement 25 at the bottom of the ring beam are equal to the diameter of the longitudinal reinforcement 31 of the beam; the distance between the stirrup 21 at the outer ring plate 13 and the circular steel tube concrete column 1 is equal to the thickness of the concrete retaining layer.

[0058] After the ring beam reinforcement frame is processed, it is hoisted to the elevation of the round steel pipe concrete column 1 by a tower crane. The concrete frame beam 2 is then fabricated on site. First, the beam stirrups 32 of the concrete frame beam 2 are placed at the formwork. Concrete protective layer pads are placed under the beam stirrups 32 and beam longitudinal reinforcement 31. At the same time, the beam longitudinal reinforcement 31 and beam stirrups 32 are tied together, as well as the beam web reinforcement 33. Then, tie bars are set at equal intervals.

[0059] The longitudinal reinforcement 31 of the beam is set according to the magnitude of the structural stress. The longitudinal reinforcement 31 of the upper and lower parts of the concrete frame beam 3 is bent and anchored near the circular steel pipe concrete column 1, and anchored according to the specifications. It is placed tightly against the circular steel pipe concrete column 1 and tied.

[0060] After the steel reinforcement is completed, the formwork is reinforced and concrete is poured.

[0061] In summary, compared with existing technologies, this embodiment has at least the following technical advantages:

[0062] Improve construction efficiency: The integrated construction method can reduce the number of steps and processes in the construction process, thereby increasing construction speed and efficiency.

[0063] Enhanced structural stability: The integrated structure of the circular steel tube concrete column 1, the ring beam 2, and the concrete frame beam with varying height difference 3 can better transfer and distribute the load, thereby improving the stability and load-bearing capacity of the entire structure.

[0064] Improving structural seismic performance: Integrated structural design can effectively improve the seismic performance of buildings and reduce the damage caused by earthquakes.

[0065] Construction safety: Integrated construction can reduce the complexity of the construction site and reduce safety hazards during the construction process.

[0066] Save on material costs: Reduce the size of components in areas with less stress to save on material and construction costs.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite structure of a concrete beam with elevation difference and a steel-concrete composite column ring beam, characterized in that, The system includes a circular steel tube concrete column, an integrally fabricated ring beam, and a concrete frame beam with varying height. The circular steel tube concrete column consists of a circular steel tube and self-compacting concrete filled inside the circular steel tube. Two reinforcing outer ring plates are fixedly welded to the outer periphery of the circular steel tube at intervals. The ring beam is fixedly connected to the reinforcing outer ring plates. One end of the concrete frame beam is fixedly connected to the ring beam.

2. The combined structure according to claim 1, characterized in that, The ring beam includes a ring beam reinforcement frame, which includes stirrups, ring beam web reinforcement, tie bars, top main reinforcement, and bottom main reinforcement. The stirrups are vertically arranged around the outer perimeter of the steel-concrete composite column, and the ring beam web reinforcement is horizontally arranged around the outer perimeter of the steel-concrete composite column and tied to the stirrups. Two layers of ring beam web reinforcement, separated by an inner and outer layer, are connected by the tie bars. The top main reinforcement is horizontally arranged at the top of the ring beam and tied to the stirrups. The bottom main reinforcement is horizontally arranged at the bottom of the ring beam and tied to the stirrups.

3. The combined structure according to claim 2, characterized in that, The stirrups include a first stirrup and a second stirrup. The width of the second stirrup is less than the width of the first stirrup, and the length of the second stirrup is greater than the length of the first stirrup. The second stirrup is located at the outer end of the first stirrup and forms a step at the bottom of the inner side. The reinforcing outer ring plate extends into the step.

4. The combined structure according to claim 3, characterized in that, The concrete frame beam includes longitudinal reinforcement, stirrups, and web reinforcement. The longitudinal reinforcement at the top and bottom is tied to the top and bottom of the stirrups, and the web reinforcement is tied to the stirrups.

5. The combined structure according to claim 4, characterized in that, The inner end of the longitudinal reinforcement of the beam extends into the ring beam and bends near the steel-concrete composite column to form a longitudinal reinforcement bend anchor.

6. A construction method for the composite structure as described in claim 5, characterized in that, Includes the following steps: The round steel tube concrete columns are fabricated in the factory and then transported to the site. Position the steel-concrete composite column according to the design drawings. After hoisting, connect the round steel-concrete composite column to the foundation and ensure its safety and stability. According to the design height, the reinforcing outer ring plate is processed in the factory. According to the structural calculation, the stiffening plates are welded at equal intervals. The reinforcing outer ring plate and the round steel tube of the round steel tube concrete column adopt a first-class fillet weld. Based on the drawings of the concrete frame beam with varying height, the ring beam steel reinforcement frame is fabricated according to the dimensions. The ring beam steel reinforcement frame is first fabricated as a whole in the steel reinforcement processing plant. The location for processing the ring beam is reserved in the steel bar processing plant. The scaffolding is erected first, and the processing of the ring beam steel bar frame is completed through the scaffolding. The bottom main reinforcement of the ring beam is placed at the bottom of the frame, and the top main reinforcement of the ring beam is placed on the frame. The bottom main reinforcement and the top main reinforcement of the ring beam are anchored together. All reinforcing bars are welded together in accordance with the specifications. The main reinforcing bars at the bottom of the ring beam, the web reinforcing bars of the ring beam, and the main reinforcing bars at the top of the ring beam are placed at the location of the ring beam and tied to the stirrups. The waist reinforcement of the ring beam is tied to the stirrups at equal intervals, and the tie bars are tied at equal intervals according to the drawing. The tie bar connection is a tying connection. After the ring beam reinforcement frame is processed, it is hoisted to the elevation of the round steel pipe concrete column by tower crane. The concrete frame beam is then fabricated on site. First, the beam stirrups of the concrete frame beam are placed at the formwork, and concrete protective layer spacers are placed under the beam stirrups and beam longitudinal reinforcement. At the same time, the beam longitudinal reinforcement and beam stirrups are tied and connected, and the beam web reinforcement is tied. Then, tie hook reinforcement is set at equal intervals. The longitudinal reinforcement of the beam is set according to the magnitude of the structural stress. The longitudinal reinforcement of the upper and lower parts of the concrete frame beam is bent and anchored near the circular steel tube concrete column, and anchored according to the specifications. It is placed tightly against the circular steel tube concrete column and tied. After the steel reinforcement is completed, the formwork is reinforced and concrete is poured.

7. The construction method according to claim 6, characterized in that, It also includes the following steps: The first stirrup is made into two U-shaped stirrups during the forming process, and then the two U-shaped stirrups are tied on site.

8. The construction method according to claim 6, characterized in that, The diameters of the main reinforcement bars at the top and bottom of the ring beam are equal to the diameters of the longitudinal reinforcement bars of the beam; the distance between the stirrups at the outer ring plate and the circular steel tube concrete column is equal to the thickness of the concrete retaining layer.

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