Steel concrete precast column and reinforced concrete precast beam connecting structure and reinforced concrete precast beam parametric modeling and demolding force calculation method

Abstract

The invention discloses a connecting structure of a steel concrete prefabricated column and a reinforced concrete prefabricated beam and a construction technology of the connecting structure in the technical field of prefabricated beam connection, the connecting structure comprises a first steel concrete prefabricated column and a second steel concrete prefabricated column, and a first reinforced concrete prefabricated beam is arranged between the first steel concrete prefabricated column and the second steel concrete prefabricated column; a drilling hole is drilled in the side edge of the first steel concrete prefabricated column, a chemical pipe is arranged in the drilling hole, a double-end stud is arranged in the chemical pipe in a matched mode, and the end, away from the chemical pipe, of the double-end stud is exposed to the outer side of the first steel concrete prefabricated column. The steel bar stabilizing and locking structures are arranged between the built-in steel bar structures in the steel concrete prefabricated column, each steel bar stabilizing and locking structure is composed of a lower limiting clamping plate, an upper limiting clamping plate, a middle limiting clamping plate, a fixing and locking connecting plate, a fixing screw and a locking nut, and the relative positions of four steel bars are limited and locked through the steel bar stabilizing and locking structures; and compared with binding wire fixation, the structural stability is better.

Description

Technical Field

[0001] The invention belongs to the technical field of precast beam connection, and specifically relates to a connection structure between a steel-concrete precast column and a reinforced concrete precast beam and its construction technology. Background Art

[0002] A steel-concrete column refers to a column made of reinforced concrete material, which is the most basic load-bearing member in various engineering structures such as buildings, bridges, and hydraulic structures. It is commonly used as a support column for floor slabs, bridge piers, foundation columns, struts of towers and trusses. A reinforced concrete beam is a beam made of reinforced concrete material. The reinforced concrete beam can be made into an independent beam, or can form an integral beam-slab floor with a reinforced concrete slab, or form an integral single-story or multi-story frame with reinforced concrete columns. During the prefabrication process of the steel-concrete column, a steel bar structure is usually tied. Four steel bars are locked through a square frame steel bar and binding wire. Then, a casting formwork is set outside the steel bar structure, and concrete slurry is poured. The steel bar structure and the concrete slurry are solidified into a whole to form a steel-concrete column. During the tying and fixing process of the steel bar structure, winding and fixing the binding wire need to be completely manual operations. The commonly used binding wire diameter is in the range of 0.8 - 1.2 mm. However, the load transfer performance of the steel bars relying on binding wire binding is not good, which will have a certain impact on the structural state and stability of the steel bar structure. In addition, when connecting the steel-concrete column and the reinforced concrete precast beam, the traditional connection method is to pre-embed bolts on the side of the steel-concrete column, and then use the bolts to fixedly connect with the reinforced concrete precast beam. Due to certain errors in the position of the pre-embedded bolts, when installing the reinforced concrete precast beam between two adjacent steel-concrete columns, the situation of not being on the same horizontal plane will occur, causing great inconvenience to the subsequent connection construction. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a connection structure between a steel-concrete precast column and a reinforced concrete precast beam and its construction technology. To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0004] Steel-concrete precast column and reinforced concrete precast beam connection structure and its construction technology, including steel-concrete precast column 1 and steel-concrete precast column 2. A reinforced concrete precast beam 1 is arranged between the steel-concrete precast column 1 and the steel-concrete precast column 2. Drilling holes are processed on the side of the steel-concrete precast column 1. A medicine tube is arranged in the drilling holes. A double-headed stud is arranged in the medicine tube in a matching manner. One end of the double-headed stud away from the medicine tube is exposed outside the steel-concrete precast column 1. A fixed connecting plate is fixedly installed outside the steel-concrete precast column 1 through the cooperation of the double-headed stud and a fixing nut. A fixed connecting sleeve box 1 is fixedly arranged on the outer side surface of the fixed connecting plate by welding. The fixed connecting sleeve box 1 is sleeved at the end position of the reinforced concrete precast beam 1. The reinforced concrete precast beam 1 and the fixed connecting sleeve box 1 are fixedly connected by expansion bolts;

[0005] Four built-in steel bars are arranged in the steel-concrete precast column 1. The cross-section centers of the four built-in steel bars form a square structure. The built-in steel bars are fixedly connected by multiple groups of steel bar stable locking structures. The multiple groups of steel bar stable locking structures are arranged at equal intervals in the vertical direction on the built-in steel bars. The steel bar stable locking structure includes: a lower limit clamping plate, an upper limit clamping plate, an intermediate limit clamping plate, a fixed locking connecting plate, a fixed screw and a locking nut. Among them, the intermediate limit clamping plate is arranged above the lower limit plate, the upper limit clamping plate is arranged above the intermediate limit clamping plate, and the fixed locking connecting plate is arranged above the upper limit clamping plate.

[0006] As a further scheme of the present invention: the upper limit clamping plate and the lower limit clamping plate have the same structure. Installation cooperation slots are arranged on both the upper limit clamping plate and the lower limit clamping plate. One end of the installation cooperation slot is open, and the other end is a semi-circular structure. The size specifications of the installation cooperation slot are adapted to the size specifications of the built-in steel bar, which is convenient for the upper limit clamping plate and the lower limit clamping plate to be clamped and installed outside the built-in steel bar.

[0007] As a further scheme of the present invention: a connecting rib plate is arranged in the middle of the intermediate limit clamping plate, and limit clamping ends extend outward at the four corners. The limit clamping ends are arc-shaped structures. The size specifications of the inner arc of the limit clamping ends are adapted to the size specifications of the built-in steel bar. The built-in steel bar is clamped and fixed through the arc structure of the installation cooperation slot and the arc structure of the limit clamping end. Since transverse ribs are arranged on the outside of the built-in steel bar, the clamping effect is ensured.

[0008] As a further solution of the present invention: Fixing connection holes are correspondingly machined on both the upper limit clamping plate and the lower limit clamping plate. Through holes are machined at positions corresponding to the fixing connection holes on the fixing and locking connection plate. The fixing screws are installed in cooperation in the through holes and the fixing connection holes. Locking nuts are installed at the end positions of the fixing screws. The positions of the steel bar stable locking structure can be locked by using the fixing screws and the locking nuts, and the construction efficiency can be effectively improved with the help of power tools.

[0009] As a further solution of the present invention: One end of the medicine tube inserted into the drilling hole is provided with a matching tapered end adapted to the bottom of the drilling hole. A positioning center hole is provided at the center position of the other end face of the medicine tube. One end of the double-headed stud adapted to the matching tapered end is designed with a pointed head, which is convenient for effectively and accurately drilling into the center position of the medicine tube.

[0010] As a further solution of the present invention: A matching installation inner cavity one is arranged in the fixed connection sleeve box one. The size specification of the matching installation inner cavity one is mutually adapted to the size specification of one end of the reinforced concrete precast beam. A pressing and positioning sleeve is fixedly arranged on the joint surface of the fixed connection plate and the steel concrete precast column one, which is used to protect the medicine tube and the double-headed stud.

[0011] As a further solution of the present invention: A reinforced concrete precast beam two is arranged between the steel concrete precast column one and the steel concrete precast column two. Fixed connection sleeve boxes two are fixedly arranged at both ends of the reinforced concrete precast beam two. The cross section of the reinforced concrete precast beam two is of an I-shaped structure. A matching installation inner cavity two is arranged in the fixed connection sleeve box two. The size specification of the matching installation inner cavity two is mutually adapted to the size specification of the reinforced concrete precast beam two.

[0012] As a further solution of the present invention: The fixed connection sleeve box two is composed of two symmetrically arranged formed structures, and the two formed structures are welded and fixed to the fixed connection plate to form a stable structure of the fixed connection sleeve box two. Eight expansion bolt structures are arranged on the outside of the fixed connection sleeve box two to ensure the stability of the connection between the fixed connection sleeve box two and the reinforced concrete precast beam two.

[0013] After adopting the above technical solutions, the present invention has the following beneficial effects compared with the prior art.

[0014] There is a steel bar stable locking structure between the built-in steel bar structures in the steel-concrete precast column of the present invention. The steel bar stable locking structure consists of a lower limit clamping plate, an upper limit clamping plate, an intermediate limit clamping plate, a fixed locking connecting plate, a fixed screw, and a locking nut. The relative positions of the four steel bars are defined and locked through the steel bar stable locking structure. Compared with the fixing by binding wire, the structural stability is better. At the same time, the lower limit clamping plate, the upper limit clamping plate, the intermediate limit clamping plate, and the fixed locking connection are fixedly connected by the fixed screw and the locking nut. When the fixed screw and the locking nut are fixed, electric tools can be used to achieve rapid fixation, effectively reducing the labor intensity and improving the prefabrication processing efficiency of the steel-concrete precast column.

[0015] When the steel-concrete precast column of the present invention is connected to the steel-concrete precast beam, a drilling hole is processed on the steel-concrete precast column by using a drilling device. A medicine tube filled with chemical agent is placed into the drilling hole. One end of a double-headed stud is screwed into the hole to break the medicine tube, and the chemical anchor bolt screw is firmly fixed in the drilling hole by the pre-tightening force generated by the agent. A fixed connecting plate is installed on the double-headed stud with a fixed nut. The fixed connecting plate and the fixed connecting sleeve box are prefabricated in advance to avoid the damage to the chemical agent caused by the high temperature of on-site welding. The reinforced concrete precast beam and the fixed connecting sleeve box of the corresponding specification are fixedly connected by collision bolts. The drilling hole is drilled and processed during assembly connection, minimizing the influence of the previous construction error on the connection between the steel-concrete precast column and the reinforced concrete precast beam, effectively improving the construction convenience of the connection structure, and at the same time improving the stability of the connection structure between the steel-concrete precast column and the reinforced concrete precast beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the connection structure of the first embodiment of the present invention;

[0017] Figure 2 It is a schematic diagram of the connection structure of the second embodiment of the present invention;

[0018] Figure 3 It is the front view of the connection of the first embodiment of the present invention;

[0019] Figure 4 It is the front view of the connection of the second embodiment of the present invention;

[0020] Figure 5 It is a schematic diagram of the connection between the steel-concrete precast column and the fixed connecting plate of the present invention;

[0021] Figure 6 It is a side view of the fixed connecting sleeve box of the present invention;

[0022] Figure 7 It is a second side view of the fixed connecting sleeve box of the present invention;

[0023] Figure 8Schematic diagram of the steel bar stable locking structure inside the steel - concrete precast column of the present invention;

[0024] Figure 9 Cross - sectional view of the steel - concrete precast column of the present invention;

[0025] Figure 10 Schematic diagram of the lower limit clamping plate of the present invention;

[0026] Figure 11 Schematic diagram of the middle limit clamping plate of the present invention;

[0027] Figure 12 Schematic diagram of the upper limit clamping plate of the present invention

[0028] Figure 13 Top - view of the steel bar stable locking structure of the present invention;

[0029] Figure 14 Cross - sectional view of the medicine tube of the present invention;

[0030] Figure 15 Flow chart of Embodiment 3 of the present invention.

[0031] In the figure: 1. Steel - concrete precast column one; 2. Steel - concrete precast column two; 3. Reinforced concrete precast beam one; 4. Fixed connecting plate; 5. Fixed connecting sleeve box one; 6. Stud; 7. Fixed nut; 8. Reinforced concrete precast beam two; 9. Fixed connecting sleeve box two; 10. Drilling hole; 11. Medicine tube; 12. Pressing and positioning sleeve; 13. Expansion bolt; 14. Fitting installation inner cavity one; 15. Fitting installation inner cavity two; 16. Built - in steel bar; 17. Steel bar stable locking structure; 18. Lower limit clamping plate; 19. Upper limit clamping plate; 20. Middle limit clamping plate; 21. Fixed locking connecting plate; 22. Fixed screw; 23. Locking nut; 24. Installation fitting slot; 25. Limit clamping end; 26. Connecting rib plate; 27. Fixed connecting hole; 28. Fitting taper end; 29. Positioning center hole. Detailed implementation method

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0033] Embodiment 1:

[0034] As Figures 1 to 14As shown in the figure, a connecting structure and its construction technology for a precast steel-concrete column and a precast reinforced-concrete beam, including a precast steel-concrete column 1 and a precast steel-concrete column 2. A precast reinforced-concrete beam 1 is arranged between the precast steel-concrete column 1 and the precast steel-concrete column 2. A drilling hole 10 is drilled and processed on the side of the precast steel-concrete column 1. A medicine tube 11 is arranged in the drilling hole 10. A double-headed stud 6 is arranged in the medicine tube 11 in a matching manner. One end of the double-headed stud 6 far from the medicine tube 11 is exposed outside the precast steel-concrete column 1. A fixed connecting plate 4 is fixedly installed outside the precast steel-concrete column 1 through the cooperation of the double-headed stud 6 and a fixing nut 7. A fixed connecting sleeve box 1 5 is fixedly arranged on the outer side surface of the fixed connecting plate 4 by welding. The fixed connecting sleeve box 1 5 is sleeved at the end position of the precast reinforced-concrete beam 1. The precast reinforced-concrete beam 1 and the fixed connecting sleeve box 1 5 are fixedly connected by an expansion bolt 13;

[0035] Four built-in steel bars 16 are arranged in the precast steel-concrete column 1. The cross-section centers of the four built-in steel bars 16 form a square structure. The built-in steel bars 16 are fixedly connected by multiple groups of steel bar stable locking structures 17. The multiple groups of steel bar stable locking structures 17 are arranged at equal intervals along the vertical direction on the built-in steel bars 16. The steel bar stable locking structure 17 includes: a lower limit clamping plate 18, an upper limit clamping plate 19, an intermediate limit clamping plate 20, a fixed locking connecting plate 21, a fixed screw 22 and a locking nut 23. Among them, an intermediate limit clamping plate 20 is arranged above the lower limit plate, an upper limit clamping plate 19 is arranged above the intermediate limit clamping plate 20, and a fixed locking connecting plate 21 is arranged above the upper limit clamping plate 19.

[0036] Among them, as shown in the appendix Figures 10 - 13 As shown in the figure, the upper limit clamping plate 19 and the lower limit clamping plate 18 have the same structure. Installation and cooperation clamping grooves 24 are arranged on both the upper limit clamping plate 19 and the lower limit clamping plate 18. One end of the installation and cooperation clamping groove 24 is open, and the other end is a semi-circular arc structure. The size specifications of the installation and cooperation clamping groove 24 are mutually adapted to the size specifications of the built-in steel bar 16, which is convenient for the upper limit clamping plate 19 and the lower limit clamping plate 18 to be clamped and installed outside the built-in steel bar 16.

[0037] As Figure 11 As shown in the figure, a connecting rib plate 26 is arranged at the middle position of the intermediate limit clamping plate 20. Limit clamping ends 25 extend outward from the four corners. The limit clamping ends 25 are arc-shaped structures. The size specifications of the inner arc of the limit clamping ends 25 are mutually adapted to the size specifications of the built-in steel bar 16. The built-in steel bar 16 is clamped and fixed through the arc structure of the installation and cooperation clamping groove 24 and the arc structure of the limit clamping ends 25. Since transverse ribs are arranged on the outside of the built-in steel bar 16, the clamping effect is ensured.

[0038] As shown in the appendix Figure 12As shown, fixing connection holes 27 are correspondingly machined on both the upper limit clamping plate 19 and the lower limit clamping plate 18. Through holes are machined at positions corresponding to the fixing connection holes 27 on the fixing and locking connection plate 21. Fixing screws 22 are fitted and installed in the through holes and the fixing connection holes 27. Locking nuts 23 are installed at the end positions of the fixing screws 22. By using the fixing screws 22 and the locking nuts 23 to lock the position of the steel bar stable locking structure 17, the construction efficiency can be effectively improved with the help of power tools.

[0039] As shown in the appendix Figure 14 As shown, one end of the medicine tube 11 inserted into the drilling hole 10 is provided with a mating taper end 28 adapted to the bottom of the drilling hole 10. A positioning center hole 29 is provided at the center position of the other end face of the medicine tube 11. One end of the double-headed stud 6 adapted to the mating taper end 28 is designed with a pointed head, which is convenient for effectively and accurately drilling into the center position of the medicine tube 11.

[0040] A mating installation inner cavity 14 is provided in the fixed connection sleeve box one 5. The size specifications of the mating installation inner cavity 14 are mutually adapted to the size specifications of the end of the reinforced concrete precast beam one 3. A pressing and positioning sleeve 12 is fixedly provided on the joint surface of the fixed connection plate 4 and the steel concrete precast column one 1, which is used to protect the medicine tube 11 and the double-headed stud 6.

[0041] A reinforced concrete precast beam two 8 is provided between the steel concrete precast column one 1 and the steel concrete precast column two 2. Fixed connection sleeve boxes two 9 are fixedly provided at both ends of the reinforced concrete precast beam two 8. The cross section of the reinforced concrete precast beam two 8 is of an I-shaped structure. A mating installation inner cavity 15 is provided in the fixed connection sleeve box two 9. The size specifications of the mating installation inner cavity 15 are mutually adapted to the size specifications of the reinforced concrete precast beam two 8.

[0042] The fixed connection sleeve box two 9 is symmetrically arranged with two formed structures. The two formed structures are welded and fixed to the fixed connection plate 4 to form a stable structure of the fixed connection sleeve box two 9. Eight expansion bolt 13 structures are provided on the outside of the fixed connection sleeve box two 9 to ensure the stability of the connection between the fixed connection sleeve box two 9 and the reinforced concrete precast beam two 8.

[0043] The working principle of the present invention is as follows: When casting and processing the first precast steel-concrete column 1 and the second precast steel-concrete column 2, it is first necessary to fixedly arrange the steel bar structure. Select the built-in steel bars 16 with appropriate diameter specifications according to the specifications of the first precast steel-concrete column 1 and the second precast steel-concrete column 2. Arrange the four built-in steel bars 16 in a square layout, and the center of the built-in steel bars 16 is located at 1 / 2 - 2 / 3 of half the side length of the first precast steel-concrete column 1 and the second precast steel-concrete column 2. Install the lower limit clamping plate 18 on one side of the built-in steel bars 16. The arc end of the installation fitting groove of the lower limit clamping plate 18 is clamped on the outside of the built-in steel bars 16. Then, set the middle limit clamping plate 20 above the lower limit clamping plate 18. The four limit clamping ends 25 at both ends of the middle limit clamping plate 20 are clamped inside the four built-in steel bars 16 for limiting. Then, install the upper limit clamping plate 19 above the middle limit clamping plate 20. The upper limit clamping plate 19 cooperates with the two built-in steel bars 16 away from the lower limit clamping plate 18. Then, use the fixed locking connecting plate 21, fixed screws 22 and locking nuts 23 to lock and fix the upper limit clamping plate 19, lower limit clamping plate 18 and middle limit clamping plate 20 between the four built-in steel bars 16. During the locking process, the cooperation of the fixed screws 22 and the locking nuts 23 can be completed with the help of power tools, effectively improving the efficiency. Transverse ribs are arranged on the outside of the built-in steel bars 16, so that the steel bar stable locking structure 17 has good fixing stability. A plurality of groups of steel bar stable locking structures 17 are evenly arranged along the length direction of the steel bars on the built-in steel bars 16 to ensure the stability of the built-in steel bar 16 structure. Then, pour concrete slurry into the mold cavity of the precast steel-concrete column to complete the casting of the precast steel-concrete column;

[0044] The precast beam is a square structure similar to the first reinforced concrete precast beam 3. First, according to the installation position of the first reinforced concrete precast beam 3, use drilling equipment to process drilling holes 10 on the sides of the first precast steel-concrete column 1, the first precast steel-concrete column 1, and the second precast steel-concrete column 2. Then, insert the end of the medicine tube 11 with the mating taper end 28 into the drilling hole 10;

[0045] According to the specification model of the precast reinforced concrete steel beam 1, select the matching fixed connection sleeve box 1 5, fix the fixed connection sleeve box 1 5 and the fixed connection plate 4 by welding. On the other side of the fixed connection plate 4, a pressing positioning sleeve 12 is arranged at a position corresponding to the drilling hole 10. After cooling down, fix and install the fixed connection sleeve box 1 5 at the end position of the precast reinforced concrete steel beam 1 of the corresponding specification through the expansion bolt 13. Use the hoisting equipment to adjust the precast reinforced concrete beam 1 3 to the connection position, align the position of the through hole on the fixed connection plate 4 with the position of the drilling hole 10, and then match the pointed end of the stud 6 with the medicine tube 11. The other end of the stud 6 is exposed outside the steel concrete precast column. Use the cooperation of the stud 6 and the fixed nut 7 to realize the fixed connection between the precast reinforced concrete column and the precast reinforced concrete beam. One hoisting can realize the fixed connection between the precast concrete beam of the steel beam and the steel concrete precast column 1 and the steel concrete precast column 2;

[0046] Example 2:

[0047] The precast beam is an I-shaped structure of the precast reinforced concrete beam 2 8. First, according to the installation position of the precast reinforced concrete beam 2 8, use drilling equipment to process drilling holes 10 on the sides of the steel concrete precast column 1, the steel concrete precast column 1, and the steel concrete precast column 2. Then insert the end of the medicine tube 11 with the mating taper end 28 into the drilling hole 10;

[0048] According to the specification model of the precast reinforced concrete steel beam 2, select the matching fixed connection sleeve box 2 9, fix the fixed connection sleeve box 2 9 and the fixed connection plate 4 by welding. On the other side of the fixed connection plate 4, a pressing positioning sleeve 12 is arranged at a position corresponding to the drilling hole 10. After cooling down, fix and install the fixed connection sleeve box 1 5 at the end position of the precast reinforced concrete steel beam 2 of the corresponding specification through the expansion bolt 13. Use the hoisting equipment to adjust the precast reinforced concrete beam 2 8 to the connection position, align the position of the through hole on the fixed connection plate 4 with the position of the drilling hole 10, and then match the pointed end of the stud 6 with the medicine tube 11. The other end of the stud 6 is exposed outside the steel concrete precast column. Use the cooperation of the stud 6 and the fixed nut 7 to realize the fixed connection between the precast reinforced concrete column and the precast reinforced concrete beam. One hoisting can realize the fixed connection between the precast concrete beam of the steel beam and the steel concrete precast column 1 and the steel concrete precast column 2;

[0049] There is a steel bar stable locking structure 17 between the built-in steel bars 16 in the precast steel-concrete column of the present invention. The steel bar stable locking structure 17 consists of a lower limit clamping plate 18, an upper limit clamping plate 19, an intermediate limit clamping plate 20, a fixed locking connecting plate 21, a fixed screw 22, and a locking nut 23. The relative positions of the four steel bars are limited and locked by the steel bar stable locking structure 17. Compared with fixing by binding wire, the structural stability is better. At the same time, the lower limit clamping plate 18, the upper limit clamping plate 19, the intermediate limit clamping plate 20, and the fixed locking connection are fixedly connected by the fixed screw 22 and the locking nut 23. When the fixed screw 22 and the locking nut 23 are fixed, electric tools can be used to achieve rapid fixation, effectively reducing the labor intensity and improving the prefabrication efficiency of the precast steel-concrete column. When the precast steel-concrete column is connected to the precast steel-concrete beam, a drilling hole 10 is machined on the precast steel-concrete column by using a drilling device, a medicine tube 11 filled with chemical agent is placed into the drilling hole 10, one end of the double-headed stud 6 is screwed into the hole, bursting the medicine tube 11, and the chemical anchor bolt screw is firmly fixed in the drilling hole 10 by the pre-tightening force generated by the agent. The fixed connecting plate 4 is installed on the double-headed stud 6 with a fixed nut 7. The fixed connecting plate 4 and the fixed connecting sleeve box are prefabricated in advance to avoid the damage to the chemical agent caused by the high temperature of on-site welding. The precast reinforced concrete beam and the fixed connecting sleeve box of the corresponding specification are fixedly connected by impact bolts. The drilling hole 10 is drilled and machined during assembly connection, minimizing the influence of the previous construction error on the connection between the precast steel-concrete column and the precast reinforced concrete beam, effectively improving the construction convenience of the connection structure, and at the same time improving the stability of the connection structure between the precast steel-concrete column and the precast reinforced concrete beam.

[0050] Example 3:

[0051] A parametric modeling and calculation method for precast reinforced concrete beams and formworks based on secondary development of Python and ABAQUS, which solves problems such as difficult analysis of the lifting load and demolding force of precast concrete beams.

[0052] The using process of the present invention is as follows:

[0053] (1) According to the preliminary design requirements, establish the geometric components of the precast concrete components and the geometric components of the precast formwork;

[0054] (2) Assemble the concrete, steel bars and formwork system to form a finite element calculation model;

[0055] (3) Divide the units of all components, and establish a unit node set on the contact surface between the precast component and the formwork;

[0056] (4) Rewrite the.rpy file, call objects such as Sketch, Part, Material, Assembly, Step, and Mesh in ABAQUS Mdb, define the key parameters for finite element modeling, and form a Python script;

[0057] (5) Calculate the bonding force per unit area between the concrete and the formwork, determine the mechanical constitutive relation of the connector element, write a Python script, use a for loop statement to calculate the distance between the node sets of the contact surface elements, and batch establish connector elements at the contact points;

[0058] (6) After the model is established, perform model data checking and calculation;

[0059] (7) After the calculation is completed, output the finite element analysis results.

[0060] The method for parameterized modeling and demolding force calculation of reinforced concrete precast beams based on the Python language according to the present invention can quickly establish a finite element model of the precast beam and the steel formwork. It can effectively solve technical problems such as the difficulty in calculating the lifting load of concrete precast components and the inaccurate calculation of the bonding force between the steel formwork and the concrete.

[0061] The above are only preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications using the technical content prompted above as equivalent embodiments with equivalent changes, but any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A connection structure of a precast steel concrete column and a precast reinforced concrete beam, comprising a first precast steel concrete column and a second precast steel concrete column, characterized in that: A reinforced concrete prefabricated beam 1 is arranged between the steel concrete prefabricated column 1 and the steel concrete prefabricated column 2, a drilling hole is drilled on the side of the steel concrete prefabricated column 1, a drug tube is arranged in the drilled hole, a stud is arranged in the drug tube, one end of the stud away from the drug tube is exposed on the outside of the steel concrete prefabricated column 1, a fixed connecting plate is fixedly installed on the outside of the steel concrete prefabricated column 1 through the stud and the fixing nut, a fixed connecting sleeve box 1 is fixedly arranged on the outer surface of the fixed connecting plate through welding, and a set of the fixed connecting sleeve box is arranged at the end position of the reinforced concrete prefabricated beam 1, and the reinforced concrete prefabricated beam 1 and the fixed connecting sleeve box 1 are fixedly connected by expansion bolts; Built-in steel bars are arranged in the reinforced concrete prefabricated column, and there are four built-in steel bars. The cross-sectional centroids of the four built-in steel bars form a square structure. The built-in steel bars are fixedly connected by multiple groups of steel bar stable locking structures. The multiple groups of steel bar stable locking structures are arranged on the built-in steel bars at equal intervals along the vertical direction. The steel bar stable locking structure includes: a lower limit card plate, an upper limit card plate, an intermediate limit card plate, a fixed locking connecting plate, a fixing screw and a locking nut, wherein an intermediate limit card plate is arranged above the lower limit plate, an upper limit card plate is arranged above the intermediate limit card plate, and a fixed locking connecting plate is arranged on the upper limit card plate.

2. The connection structure of the precast steel concrete column and the precast reinforced concrete beam according to claim 1 is characterized in that: The upper limit card plate and the lower limit card plate have the same structure, and are both provided with installation matching slots, one end of the installation matching slot is open, and the other end is a semicircular arc structure, and the size specifications of the installation matching slot are compatible with the size specifications of the built-in steel bars.

3. The connection structure of the precast steel concrete column and the precast reinforced concrete beam according to claim 2 is characterized in that: A connecting rib plate is arranged in the middle position of the middle limit clamping plate, and limit clamping ends are extended outward at the four corners. The limit clamping ends are arc-shaped structures, and the size specifications of the inner arc of the limit clamping ends are mutually adapted to the size specifications of the built-in steel bars. The built-in steel bars are clamped and fixed by the arc structure of the mounting matching clamping groove and the arc structure of the limit clamping ends.

4. The connection structure of the precast steel concrete column and the precast reinforced concrete beam according to claim 3 is characterized in that: The upper limit clamping plate and the lower limit clamping plate are both processed with corresponding fixed connection holes, and the fixed locking connection plate is processed with through holes at positions corresponding to the fixed connection holes. The fixing screws are installed in the through holes and the fixed connection holes, and a locking nut is installed at the end position of the fixing screw. The fixing screw and the locking nut lock the position of the steel bar stable locking structure.

5. The connection structure of the precast steel concrete column and the precast reinforced concrete beam according to claim 4 is characterized in that: One end of the medicine tube inserted into the drilled hole is provided with a matching cone end matched with the bottom of the drilled hole, and the center position of the other end surface of the medicine tube is provided with a positioning center hole, and the end of the stud bolt matched with the matching cone end is designed with a pointed head.

6. The connection structure of the precast steel concrete column and the precast reinforced concrete beam according to claim 5, characterized in that: The fixed connection sleeve box is provided with a matching installation inner cavity, the size of which is compatible with the size of the end of the reinforced concrete precast beam, and a compression positioning sleeve is fixedly provided on the fitting surface between the fixed connection plate and the steel concrete precast column.

7. The connection structure of the precast steel concrete column and the precast reinforced concrete beam according to claim 1, characterized in that: A second reinforced concrete prefabricated beam is arranged between the first steel concrete prefabricated column and the second steel concrete prefabricated column. Two fixed connection sleeves are fixedly arranged at both ends of the second reinforced concrete prefabricated beam. The cross-section of the second reinforced concrete prefabricated beam is an I-shaped structure. A second matching installation inner cavity is arranged in the second fixed connection sleeve. The size specification of the second matching installation inner cavity is mutually compatible with the size specification of the second reinforced concrete prefabricated beam.

8. The connection structure of the precast steel concrete column and the precast reinforced concrete beam according to claim 7, characterized in that: The second fixed connection sleeve is symmetrically arranged with two forming structures, and the two forming structures are welded and fixed to the fixed connection plate to form a stable structure of the second fixed connection sleeve. Eight expansion bolt structures are arranged on the outside of the second fixed connection sleeve.

9. A construction process, using the connection structure of precast steel concrete columns and precast reinforced concrete beams in claims 1 to 8, characterized in that: First, according to the installation position of the reinforced concrete prefabricated steel beam, the drilling hole is processed on the side of the reinforced concrete prefabricated column by using a drilling device, and then the end of the drug tube with the matching cone end is inserted into the drilling hole; According to the specifications and models of the reinforced concrete prefabricated steel beam used, a matching fixed connection sleeve is selected, and the fixed connection sleeve is fixed to the fixed connection plate by welding. The position on the other side of the fixed connection plate corresponding to the drilled hole is provided with the clamping positioning sleeve. After cooling, the fixed connection sleeve is installed at the end position of the reinforced concrete prefabricated steel beam of corresponding specifications through the expansion bolt fixing sleeve. The reinforced concrete prefabricated beam is adjusted to the connection position by using the lifting equipment, and the position of the through hole on the fixed connection plate is made to correspond to the position of the drilled hole. Then, the pointed end of the stud is matched with the medicine tube, and the other end of the stud is exposed on the outside of the steel concrete prefabricated column. The stud is matched with the fixing nut to realize the fixed connection between the reinforced concrete prefabricated column and the reinforced concrete prefabricated beam.

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