Positioning and connecting device for stiff column and frame beam and construction method of positioning and connecting device

Abstract

The invention relates to a stiff column and frame beam positioning and connecting device and a construction method thereof, and relates to the technical field of building structure construction. Comprising angle steel arranged in pairs, high-strength bolt assemblies and opposite-pull screw assemblies. One side face of the angle steel is connected with a profile steel flange plate of the stiff column through a high-strength bolt assembly, and a first long round hole is formed in the position, corresponding to the high-strength bolt assembly, of the angle steel so that fine adjustment in the horizontal direction can be achieved. The opposite-pull screw assembly is connected between the angle steel arranged in pairs and used for clamping and positioning a main rib of the frame beam. Precise positioning is achieved by oppositely pulling and fixing the main reinforcements of the frame beam through the high-strength bolts, the main reinforcements of the frame beam are anchored through the end embedded plates, the problems of main reinforcement height difference, perpendicularity deviation and the like caused by installation deviation can be effectively solved through adjustability of the device, it is guaranteed that the thickness of a reinforcement protection layer is uniform, meanwhile, the field welding procedure is omitted, and the production cost is reduced. The influence of space limitation on construction is greatly reduced, the construction efficiency is high, the connection is reliable, and the quality is easy to guarantee.

Description

Technical Field

[0001] This application relates to the field of building structure construction technology, and in particular to a positioning and connection device for stiffened columns and frame beams and its construction method. Background Technology

[0002] In modern high-rise buildings and long-span structures, reinforced concrete structures (rigid structures) are widely used due to their advantages such as high load-bearing capacity, high stiffness, and good seismic performance. Rigid structures are typically composed of steel sections (such as cross-shaped steel and H-shaped steel) combined with reinforced concrete. The connection points between the rigid columns and frame beams are critical components of the structure, and their construction quality directly affects the safety and reliability of the entire building structure.

[0003] In traditional construction methods for connecting stiffened columns and frame beams, the main reinforcement bars of the frame beam typically need to be welded to the steel sections of the stiffened column or fixed using complex mechanical connections. However, these traditional methods have several drawbacks: First, on-site welding involves a large workload, resulting in low efficiency and weld quality that is highly susceptible to variations in welder skill level and site conditions, making quality difficult to guarantee and posing safety hazards. Second, welding or connection operations are extremely difficult in confined spaces, as the dense steel sections and reinforcement bars within the stiffened column severely restrict space, impacting construction progress and connection accuracy. Third, due to unavoidable cumulative errors during component processing and installation, positional deviations often occur between the main reinforcement bars of the frame beam and the pre-set connection points, particularly in elevation and verticality, which are difficult to adjust. This ultimately affects the uniformity of the reinforcement protective layer thickness, sometimes requiring rework, leading to project delays and increased costs. Summary of the Invention

[0004] To address the technical problems in existing positioning and connection devices for stiffened columns and frame beams, such as large on-site welding workload, significant space constraints, difficulty in adjusting installation deviations, and difficulty in ensuring the thickness of the protective layer, this application provides a positioning and connection device for stiffened columns and frame beams.

[0005] The positioning and connection device for stiffened columns and frame beams provided in this application adopts the following technical solution: a steel flange plate for connecting stiffened columns and main reinforcement bars of frame beams, including: at least one pair of angle steels, respectively set at preset positions of the steel flange plate, each angle steel including a first side plate and a second side plate that are perpendicular to each other;

[0006] A high-strength bolt assembly is provided to fix the first side plate to the steel flange plate. The first side plate has a first elongated hole corresponding to the high-strength bolt assembly. The diameter of the first elongated hole is larger than the diameter of the bolt in the high-strength bolt assembly, which is used to adjust the position of the angle steel relative to the steel flange plate.

[0007] Furthermore, the tie rod assembly, connected between the second side plates of the paired angle steels, is used to clamp and position the main reinforcement of the frame beam. By employing this technical solution, the main reinforcement of the frame beam can be flexibly installed and its position adjusted on the flange plate of the stiffened column steel through the cooperation of the angle steel and the high-strength bolt assembly. The design of the first elongated hole allows for fine-tuning of the horizontal position of the angle steel along its length, avoiding rework due to deviations between the main reinforcement and the preset connection point. Simultaneously, the tie rod assembly clamps and fixes the main reinforcement of the frame beam between the paired angle steels' second side plates, eliminating the need for on-site welding, significantly reducing welding workload, lowering reliance on welder skills, and minimizing on-site safety hazards. In addition, all components of this device are mechanically connected, making operation convenient, especially suitable for confined spaces with dense steel sections and reinforcement within stiffened columns. This effectively improves construction efficiency and connection accuracy, ensuring the accurate positioning of the main reinforcement of the frame beam, thereby guaranteeing the uniformity of the reinforcement protective layer thickness and improving the construction quality of structural connection nodes.

[0008] As a preferred embodiment, the tie rod assembly includes at least one set of upper tie rods and lower tie rods, both of which are horizontally arranged and their ends are respectively connected to the second side plates of the paired angle steels. A clamping space is formed between the upper tie rods and the lower tie rods to accommodate and limit the main reinforcement of the frame beam.

[0009] By adopting the above technical solution, the upper and lower tie rods are arranged parallel to each other, forming a stable clamping area. When the main reinforcement of the frame beam is placed in this clamping space, the upper and lower tie rods can effectively limit the main reinforcement from the top and bottom, preventing the main reinforcement from shifting in the height direction.

[0010] As a preferred embodiment, the second side plate is provided with a second elongated hole corresponding to the upper pull screw and the lower pull screw. The length direction of the second elongated hole is perpendicular to the length direction of the first elongated hole. The ends of the upper pull screw and the lower pull screw pass through the corresponding second elongated hole and are locked and fixed by a fixing nut.

[0011] By adopting the above technical solution, the setting of the second elongated hole provides vertical adjustment space for the tie rod assembly. When there is a deviation in the elevation of the main reinforcement of the frame beam, the construction workers can loosen the nut at the end of the tie rod assembly, move the tie rod up and down along the length of the second elongated hole until it is adjusted to the accurate elevation position required by the main reinforcement, and then retighten the nut to complete the fixation.

[0012] As a preferred embodiment, the ends of the main reinforcement bars of the frame beam are fixedly connected with end plates. The main reinforcement bars abut against and are fixed to the second side plate of the angle steel through the end plates. The area of ​​the end plates is larger than the cross-section of the main reinforcement bars.

[0013] By adopting the above technical solution and setting end embedded plates, the contact area between the main reinforcement and the second side plate of the angle steel is increased, making the stress on the main reinforcement more uniform and avoiding damage to the main reinforcement or loosening of the connection due to local stress concentration.

[0014] As a preferred embodiment, the diameter of the first elongated hole is one size larger than the diameter of the bolt in the high-strength bolt assembly.

[0015] By adopting the above technical solution, it is possible to ensure that the bolt has sufficient room to move within the hole for horizontal position adjustment, and to avoid unnecessary shaking of the angle steel after installation due to excessive hole diameter, thus ensuring the stability of the connection.

[0016] As a preferred embodiment, it also includes adjustable sleeves respectively fitted on the upper tie bolt and the lower tie bolt, and the smaller diameter main reinforcement bars installed at the same time are fixed by the adjustable sleeves;

[0017] The adjustable sleeve includes a first sleeve, a connecting post disposed at one end of the first sleeve, a second sleeve coaxially disposed with the first sleeve, and a connecting groove disposed on the inner wall of the second sleeve. The connecting post and the connecting groove are connected by a threaded structure, and the connecting groove is designed to be concave. The inner wall of the connecting post is equal to the inner wall of the first sleeve. With this design, when there are main reinforcement bars of different diameters in the frame beam, the main reinforcement bars with smaller diameters can be placed between the upper and lower tie rods. Thus, when the tie rod assembly is clamped, the outer circumference of the adjustable sleeve abuts against the main reinforcement bars with smaller diameters, preventing them from moving laterally or shaking in the clamping space. The main reinforcement bars with larger diameters are clamped by the upper and lower tie rods. The overall length is adjusted by rotating the first and second sleeves and utilizing the threaded engagement between the connecting post and the connecting groove.

[0018] A method for positioning and connecting a stiffened column and a frame beam based on the above-mentioned device includes the following steps:

[0019] Step 1: Construction preparation and measurement, including the hoisting of steel columns for the stiffened columns, verticality correction and temporary fixing;

[0020] Step 2: Tie the reinforcing bars of the stiffening columns and complete the installation of the bottom formwork of the beam;

[0021] Step 3: Install the positioning and connecting device. According to the position of the reserved hole on the steel flange, install the angle steel and tighten it initially by inserting the high-strength bolt assembly into the first elongated hole.

[0022] Step 4: Elevation and position adjustment. Install the lower tie rod. According to the design elevation, adjust the position of the angle steel through the first elongated hole and adjust the position of the tie rod assembly through the second elongated hole to match the installation height and horizontal position of the main reinforcement of the frame beam.

[0023] Step 5: Install the main reinforcement bars of the frame beam. Hoist the main reinforcement bars of the frame beam, connect the ends of the main reinforcement bars to the angle steel, and temporarily fix them.

[0024] Step 6: Lock the main rib, install the upper tie rod to form a tie system with the lower tie rod, clamp and lock the main rib, and fix the two ends of the upper tie rod and the lower tie rod with fixing nuts;

[0025] Step 7: Pour concrete.

[0026] In step three, the initial tightening torque is 40%-60% of the final tightening torque to ensure that the angle steel can be slightly adjusted in position along the first elongated hole.

[0027] In step four, the elevation deviation is controlled within ±5mm.

[0028] In step five, the end embedded plate of the main reinforcement of the frame beam is precisely connected with the second side plate of the angle steel to ensure that the axis of the main reinforcement is consistent with the design axis of the beam, and the spacing of the main reinforcement and the thickness of the protective layer are checked.

[0029] In step six, the high-strength bolt assembly is finally tightened, and the nuts of the upper and lower tie rods are tightened to complete the positioning and locking of the main rib.

[0030] In summary, this application includes the following beneficial technical effects:

[0031] 1. This invention achieves all connections using high-strength bolt assemblies and tie rod assemblies, completely replacing traditional on-site welding procedures. This not only avoids structural safety hazards caused by unstable welding quality, but also eliminates safety risks and environmental pollution caused by welding sparks and fumes, making the construction process greener and safer.

[0032] 2. By creating a first and a second elongated oval hole in the angle steel, the connection between the angle steel and the flange of the structural steel, as well as the connection between the tie rod assembly and the angle steel, becomes positionally adjustable. During construction, the planar position, verticality, and elevation of the connection device can be finely adjusted to the millimeter level based on actual measurement data. This precisely compensates for accumulated errors generated during component processing and installation, effectively solving common problems such as main reinforcement height difference and axial offset, ensuring that the main reinforcement can be accurately positioned in the design location.

[0033] 3. Because the position of the main reinforcement bars can be adjusted and locked, the relative position between the main reinforcement bars and the formwork can be controlled according to the actual situation, thus ensuring a uniform thickness of the reinforcement protective layer. This is crucial for preventing reinforcement corrosion and improving structural durability and service life.

[0034] 4. This device has a compact structure, and all operations are completed in the beam end node area by bolt fastening. There is no need to reserve a large operating space for welding. It is especially suitable for the node area of ​​rigid structures with dense steel sections and reinforcing bars, effectively solving the problem of construction difficulties in narrow spaces and improving the convenience and efficiency of construction.

[0035] 5. Using angle steel as a force-transmitting component, the tie rod assembly forms a closed tie system, reliably transferring the tensile force of the main reinforcement of the frame beam to the steel flange plate of the stiffened column. The design of the end embedded plate increases the bearing area at the end of the main reinforcement, prevents stress concentration, and ensures that the mechanical properties of the connection node are equal to or better than those of traditional welded nodes. Attached Figure Description

[0036] Figure 1 This is a structural schematic diagram of a positioning connection device for a stiffened column and a frame beam according to this application;

[0037] Figure 2 This application relates to a positioning connection device for a stiffened column and a frame beam. Figure 1 A structural schematic diagram of the side view;

[0038] Figure 3 This is a schematic diagram of the structure of a positioning connection device for a stiffened column and a frame beam in this application when the connecting device is separated from the steel flange plate;

[0039] Figure 4 This is a structural schematic diagram of the angle steel and tie rod assembly in the positioning connection device of the stiffened column and frame beam of this application;

[0040] Figure 5 This is a structural schematic diagram of the main reinforcement and end embedded plate in a positioning connection device for a stiffened column and a frame beam according to this application.

[0041] Figure 6 This is a flowchart of the construction method for positioning and connecting stiffened columns and frame beams in the positioning and connection device of the stiffened column and frame beam of this application.

[0042] Figure 7 This is a structural schematic diagram of the tie bolt assembly for main reinforcing bars of different diameters in a positioning connection device for stiffened columns and frame beams according to this application.

[0043] Figure 8 This is a structural schematic diagram of the assembly of the adjustable sleeve and tie bolt assembly in a positioning connection device for a stiffened column and a frame beam according to this application.

[0044] Figure 9 This is a schematic diagram of the adjustable sleeve in a positioning connection device for a stiffened column and a frame beam, as described in this application.

[0045] Explanation of reference numerals in the attached drawings: 1. Steel flange plate; 2. Main reinforcement; 3. Angle steel; 31. First side plate; 311. First oblong hole; 32. Second side plate; 321. Second oblong hole; 4. High-strength bolt assembly; 41. Reserved hole; 5. Tie rod assembly; 51. Upper tie rod; 52. Lower tie rod; 53. Fixing nut; 6. End embedded plate; 7. Adjustable sleeve; 71. First sleeve; 711. Connecting column; 72. Second sleeve; 721. Connecting groove. Detailed Implementation

[0046] The present application will be further described in detail below with reference to the accompanying drawings.

[0047] Example 1:

[0048] This embodiment is applicable to standard working conditions where the diameter of the main reinforcement bars 2 in the frame beam is relatively uniform. Horizontal position adjustment is achieved through the first elongated hole 311, and vertical elevation adjustment is achieved through the second elongated hole 321, effectively eliminating construction deviations within ±10mm. The end embedded plate 6 increases the contact area between the main reinforcement bars 2 and the angle steel 3, resulting in more uniform stress distribution and a clear and reliable force transmission path. The entire installation process requires no on-site welding, making it convenient to operate and particularly suitable for confined spaces with dense steel sections and reinforcement bars within stiffened columns.

[0049] Please refer to details. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 It includes a steel flange plate 1 for connecting the stiffened column and the main reinforcement 2 of the frame beam, and also includes at least one pair of angle steels 3, which are respectively set at the preset positions of the steel flange plate 1, and each angle steel 3 includes a first side plate 31 and a second side plate 32 that are perpendicular to each other.

[0050] Please refer to details. Figure 3 , Figure 4 and Figure 5 The high-strength bolt assembly 4 fixes the first side plate 31 to the steel flange plate 1. The first side plate 31 has a first elongated hole 311 corresponding to the high-strength bolt assembly 4. The diameter of the first elongated hole 311 is larger than the diameter of the bolt in the high-strength bolt assembly 4, and is used to adjust the position of the angle steel 3 relative to the steel flange plate 1.

[0051] Please refer to details. Figure 4 and Figure 5The device includes a tie rod assembly 5, connected between the second side plates 32 of the paired angle steels 3, used to clamp and position the main reinforcement 2 of the frame beam. By adopting the above technical solution, the main reinforcement 2 of the frame beam can be flexibly installed and its position adjusted on the flange plate 1 of the stiffened column steel through the cooperation of the angle steels 3 and the high-strength bolt assembly 4. The design of the first elongated hole 311 allows for fine-tuning of the horizontal position of the angle steels 3 along their length, avoiding rework due to deviations between the main reinforcement 2 and the preset connection point. Simultaneously, the tie rod assembly 5 clamps and fixes the main reinforcement 2 of the frame beam between the paired angle steels 3 and the second side plates 32, eliminating the need for on-site welding, significantly reducing welding workload, lowering reliance on welder skills, and mitigating on-site safety hazards. Furthermore, all components of the device are mechanically connected, making operation convenient, especially suitable for confined spaces with dense steel sections and reinforcement bars within the stiffened column. This effectively improves construction efficiency and connection accuracy, ensuring the accurate positioning of the main reinforcement 2 of the frame beam, thereby guaranteeing the uniformity of the reinforcement protective layer thickness and improving the construction quality of structural connection nodes.

[0052] Please refer to details. Figure 4 The tie rod assembly 5 includes at least one set of upper tie rods 51 and lower tie rods 52. Both upper and lower tie rods 51 and 52 are horizontally arranged, and their ends are respectively connected to the second side plates 32 of the paired angle steels 3. A clamping space is formed between the upper and lower tie rods 51 and 52 to accommodate and limit the main reinforcement 2 of the frame beam. By adopting the above technical solution, the upper and lower tie rods 51 and 52 are arranged parallel vertically, forming a stable clamping area. When the main reinforcement 2 of the frame beam is placed in this clamping space, the upper and lower tie rods can effectively limit it from the top and bottom of the main reinforcement 2, preventing displacement of the main reinforcement 2 in the height direction. Simultaneously, the paired second side plates 32 of the angle steels 3 provide lateral restraint from both sides of the main reinforcement 2, forming a three-dimensional positioning system in conjunction with the upper and lower tie rods, ensuring that the main reinforcement 2 does not shift or rotate horizontally during installation. This structural design allows for more precise and reliable positioning of the main reinforcement bar 2, enabling strict control over its spatial position at the stiffened column joint, thus providing a strong guarantee for the uniformity of the reinforcement protective layer thickness during subsequent concrete pouring. Furthermore, by adjusting the tightness of the upper tie rod 51 and the lower tie rod 52, the clamping requirements of the main reinforcement bar 2 for frame beams of different diameters can be accommodated, enhancing the versatility and applicability of the device.

[0053] Please refer to details. Figure 4 and Figure 5The second side plate 32 has a second elongated hole 321 corresponding to the upper tie rod 51 and the lower tie rod 52. The length direction of the second elongated hole 321 is perpendicular to the length direction of the first elongated hole 311. The ends of the upper tie rod 51 and the lower tie rod 52 pass through the corresponding second elongated hole 321 and are locked in place by a fixing nut 53. By adopting the above technical solution, the setting of the second elongated hole 321 provides the tie rod assembly 5 with adjustment space in the vertical direction. When there is a deviation in the elevation of the main reinforcement 2 of the frame beam, the construction personnel can loosen the nut at the end of the tie rod assembly 5, move the tie rod up and down along the length direction of the second elongated hole 321 until it is adjusted to the accurate elevation position required by the main reinforcement 2, and then tighten the nut to complete the fixation. Specifically, when the elevation of the main reinforcement 2 needs to be adjusted, simply loosen the fixing nuts 53 at both ends of the tie rod assembly 5, move the tie rod up and down along the length of the second elongated hole 321 to the appropriate position, and then retighten the nuts. This vertical adjustment function allows the device to better adapt to the actual working conditions on site, effectively solving the construction problems caused by the difficulty in adjusting elevation deviations in traditional connection methods, further improving the accuracy of the positioning of the main reinforcement 2 of the frame beam and the convenience of construction, and ensuring that the thickness of the reinforcement protective layer meets the design requirements.

[0054] Please refer to details. Figure 5 The main reinforcement 2 of the frame beam is fixedly connected to the end of the end plate 6. The main reinforcement 2 abuts against and is fixed to the second side plate 32 of the angle steel 3 through the end plate 6. The area of ​​the end plate 6 is larger than the cross-sectional area of ​​the main reinforcement 2. By setting the end plate 6, the contact area between the main reinforcement 2 and the second side plate 32 of the angle steel 3 is increased, making the stress on the main reinforcement 2 more uniform and avoiding damage to the main reinforcement 2 or loosening of the connection due to local stress concentration.

[0055] Please refer to details. Figure 2 The diameter of the first elongated hole 311 is one size larger than the diameter of the bolt in the high-strength bolt assembly 4. This ensures that the bolt has sufficient room to move within the hole for horizontal position adjustment, and also prevents unnecessary shaking of the angle steel 3 after installation due to excessive hole diameter, thus ensuring the stability of the connection.

[0056] Construction methods

[0057] Please refer to details. Figure 6 This embodiment also provides a construction method for positioning and connecting the stiffening column and the frame beam based on the above-mentioned device, which specifically includes the following steps:

[0058] Step 1: Construction Preparation and Measurement. First, conduct all necessary preparatory work before construction, including material inspection and equipment preparation. Then, perform precise measurements to determine the location of the connection points on the steel flange plate 1 of the stiffened column, and pre-drill holes for installing the high-strength bolt assembly 4.

[0059] Step Two: Steel Column and Reinforcing Bar Installation. The steel columns for the stiffening structures are hoisted, and their verticality is corrected and temporarily secured. The column stirrups and other materials are placed inside the stiffening columns before the reinforcing bars are tied. Next, the bottom formwork and scaffolding for the frame beams are erected.

[0060] Step 3: Installation of Positioning and Connecting Devices. After the bottom formwork of the beam is installed, the positioning and connecting devices are installed on-site according to the positions of the reserved holes 41 on the steel flange plate 1. The first side plate 31 of the angle steel 3 is attached to the steel flange plate 1, the high-strength bolt assembly 4 is inserted, and an initial tightening torque is applied. The initial tightening torque value is set to about 50% of the final tightening value. For example, if the final tightening value is 500 N·m, then the initial tightening value is 250 N·m. At this stage, the high-strength bolt assembly 4 is not tightened completely. The purpose is to allow the angle steel 3 to slide slightly along the first elongated hole 311 to cope with possible installation deviations later.

[0061] Step 4: Elevation and Position Adjustment. Install the lower tie rod 52. At this point, based on the beam design elevation, precisely adjust the installation height of the angle steel 3 and the tie rod assembly 5 by adjusting the relative position of the first elongated hole 311 of the angle steel 3 and the high-strength bolt, and the position of the lower tie rod 52 in the second elongated hole 321. Simultaneously, the verticality of the angle steel 3 can be finely adjusted to ensure that its second side plate 32 is in an ideal vertical plane, so as to tightly fit with the end embedded plate 6 of the main reinforcement 2. Through repeated measurement and adjustment, the deviation of the installation elevation of the main reinforcement 2 of the frame beam is strictly controlled within ±5mm. After adjustment, initially lock the fixing nut 53 of the lower tie rod 52.

[0062] Step 5: Installation of the main reinforcement bars 2 of the frame beam. Using hoisting equipment, hoist the main reinforcement bars 2 of the frame beam, which have end plates 6 pre-welded to their ends, into place. Place the end plates 6 of the main reinforcement bars 2 stably and abut them against the second side plates 32 of the two angle steels 3. At this time, it is necessary to ensure that the axis of the main reinforcement bars 2 is completely aligned with the design axis of the beam. Verify the spacing, protective layer thickness, and other parameters of the main reinforcement bars 2 using a total station or a string line. After confirming that everything is correct, temporarily fix the main reinforcement bars 2 with temporary supports or simple clamps to prevent them from shaking.

[0063] Step Six: Locking the Main Reinforcing Bar 2. Install the upper tie rod 51. Pass the upper tie rod 51 through the second elongated hole 321 on the second side plate 32 of the two angle steels 3, and install the fixing nut 53. Then, symmetrically and alternately tighten the fixing nuts 53 of the upper tie rod 51 and the lower tie rod 52 to ensure tight contact with the end embedded plate 6, forming a strong tie system to clamp the main reinforcing bar 2. Next, use a torque wrench to finally tighten the high-strength bolt assembly 4 to the design-required final tightening torque value, and simultaneously tighten the nuts of the upper tie bolt 51 and the lower tie rod 52 again to complete the final positioning and locking of the main reinforcing bar 2. This step ensures that the main reinforcing bar 2 will not shift during the subsequent concrete pouring process.

[0064] Step Seven: Concrete Pouring. After inspecting and accepting all reinforcement and installations, concrete pouring shall commence. During pouring, the concrete should be poured slowly from both ends of the beam towards the joint, avoiding direct impact of the concrete hopper on the positioning device and main reinforcement 2 to prevent loosening of the connection. In the core area of ​​the joint, due to the denser reinforcement and installations, vibration should be intensified, but the vibrator must be operated with caution, avoiding components such as bolts and angle steel 3, to ensure the concrete is dense without damaging the connection. After the concrete pouring is completed, moist curing shall be carried out according to the specifications, with a curing time of not less than 14 days.

[0065] Example 2

[0066] This embodiment is applicable to situations where the diameters of the main reinforcement bars 2 in the frame beam are inconsistent. By adding an adjustable sleeve 7 to the first embodiment, the same tie rod assembly 5 can simultaneously accommodate the positioning requirements of multiple main reinforcement bars 2 with different diameters, eliminating the need for separate connection devices for main reinforcement bars 2 with different diameters, thus greatly improving the versatility of the device and construction efficiency.

[0067] like Figure 7 , Figure 8 and Figure 9 As shown, this embodiment, based on the structure of Embodiment 1, further includes adjustable sleeves 7 respectively fitted onto the upper tie rod 51 and the lower tie rod 52. The adjustable sleeves 7 are used to fix the smaller diameter main reinforcing bars 2 installed simultaneously.

[0068] Specifically, please refer to Figure 8 and Figure 9 The adjustable sleeve 7 has a first sleeve 71, a connecting post 711 disposed at one end of the first sleeve 71, a second sleeve 72 disposed coaxially with the first sleeve 71, and a connecting groove 721 disposed on the inner wall of the second sleeve 72. The connecting post 711 and the connecting groove 721 are connected by a threaded structure, and the connecting groove 721 is set to be concave. The inner wall of the connecting post 711 is flush with the inner wall of the first sleeve 71, ensuring that the inner wall of the adjustable sleeve 7 can remain smooth when it is sleeved on the tie rod assembly 5, so as not to affect the insertion of the tie rod assembly 5.

[0069] The working principle and adjustment method of this embodiment are as follows:

[0070] When there are main reinforcement bars 2 of different diameters in the frame beam, the main reinforcement bars with larger diameters can be directly clamped and fixed by the upper tie rod 51 and the lower tie rod 52. The fixing method is the same as in Example 1.

[0071] For the main rib with a smaller diameter, it is placed between the upper tie rod 51 and the lower tie rod 52. During the clamping process of the tie rod assembly 5, the outer periphery of the adjustable sleeve 7 abuts against the main rib with a smaller diameter to prevent it from moving laterally or swaying within the clamping space.

[0072] During adjustment, the overall length of the adjustable sleeve 7 is adjusted by rotating the first sleeve 71 and the second sleeve 72, utilizing the threaded engagement between the connecting post 711 and the connecting groove 721. Operators can precisely adjust the length of the adjustable sleeve 7 according to the actual deviation of the main reinforcement diameter, ensuring that the adjustable sleeves 7 on both sides can make tight contact with the adjacent main reinforcements on both sides of the main reinforcement to be fixed.

[0073] For example, if the diameter of a main reinforcing bar is 10mm smaller than the standard diameter, the length of each adjustable sleeve 7 can be increased by 5mm by rotating and adjusting the two sides, so that the adjustable sleeves 7 on both sides can be in close contact with the two sides of the main reinforcing bar, and form a stable clamping with the upper and lower tie rods.

[0074] Through the above design, this embodiment can simultaneously fix multiple main ribs of different diameters on the same tie rod assembly 5. Each main rib can obtain stable positioning and reliable clamping force in the clamping space, effectively solving the problems of unstable clamping and inaccurate positioning caused by different diameters of main ribs in traditional connection methods.

[0075] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A positioning and connection device for a stiffened column and a frame beam, used to connect the steel flange plate (1) of the stiffened column and the main reinforcement (2) of the frame beam, characterized in that: include: At least one pair of angle steels (3) are respectively set at the preset positions of the steel flange plate (1), and each angle steel (3) includes a first side plate (31) and a second side plate (32) that are perpendicular to each other. The high-strength bolt assembly (4) fixes the first side plate (31) to the steel flange plate (1). The first side plate (31) has a first elongated hole (311) corresponding to the high-strength bolt assembly (4). The diameter of the first elongated hole (311) is larger than the diameter of the bolt in the high-strength bolt assembly (4) and is used to adjust the position of the angle steel (3) relative to the steel flange plate (1). And, a tie rod assembly (5) is connected between the second side plates (32) of the paired angle steels (3) for clamping and positioning the main reinforcement (2) of the frame beam.

2. The positioning and connection device for a stiffening column and a frame beam according to claim 1, characterized in that: The tie rod assembly (5) includes at least one set of upper tie rods (51) and lower tie rods (52). The upper tie rods (51) and lower tie rods (52) are both horizontally arranged, and their two ends are respectively connected to the second side plate (32) of the paired angle steel (3). A clamping space is formed between the upper tie rods (51) and lower tie rods (52) to accommodate and limit the main reinforcement (2) of the frame beam.

3. The positioning and connection device for a stiffening column and a frame beam according to claim 2, characterized in that: The second side plate (32) is provided with a second elongated hole (321) corresponding to the upper pull screw (51) and the lower pull screw (52). The length direction of the second elongated hole (321) is perpendicular to the length direction of the first elongated hole (311). The ends of the upper pull screw (51) and the lower pull screw (52) pass through the corresponding second elongated hole (321) and are locked and fixed by a fixing nut (53).

4. The positioning and connection device for a stiffening column and a frame beam according to claim 3, characterized in that: The end of the main reinforcement (2) of the frame beam is fixedly connected to an end embedded plate (6). The main reinforcement (2) abuts against and is fixed to the second side plate (32) of the angle steel (3) through the end embedded plate (6). The area of ​​the end embedded plate (6) is larger than the cross-sectional area of ​​the main reinforcement (2).

5. The positioning and connection device for a stiffening column and a frame beam according to claim 4, characterized in that: It also includes adjustable sleeves (7) respectively fitted on the upper tie rod (51) and the lower tie rod (52). The adjustable sleeve (7) includes a first sleeve (71), a connecting post (711) disposed at one end of the first sleeve (71), a second sleeve (72) coaxially disposed with the first sleeve (71), and a connecting groove (721) disposed on the inner wall of the second sleeve (72). The connecting post (711) and the connecting groove (721) are connected by a threaded structure, and the connecting groove (721) is set to be concave.

6. A method for positioning and connecting a stiffening column and a frame beam based on the device described in claim 5, characterized in that, Includes the following steps: Step 1: Construction preparation and measurement, including the hoisting of steel columns for the stiffened columns, verticality correction and temporary fixing; Step 2: Tie the reinforcing bars of the stiffening columns and complete the installation of the bottom formwork of the beam; Step 3: Install the positioning and connecting device. According to the position of the reserved hole (41) on the steel flange plate (1), install the angle steel (3) and use the high-strength bolt assembly (4) to pass through the first elongated hole (311) for initial tightening and fixing. Step 4: Elevation and position adjustment. Install the lower tie rod (52). According to the design elevation, adjust the position of the angle steel (3) through the first elongated hole (311) and adjust the position of the tie rod assembly (5) through the second elongated hole (321) to match the installation height and horizontal position of the main reinforcement (2) of the frame beam. Step 5: Install the main reinforcement (2) of the frame beam. Hoist the main reinforcement (2) of the frame beam, connect the end of the main reinforcement (2) to the angle steel (3), and temporarily fix it. Step 6: Lock the main rib (2), install the upper tie rod (51) to form a tie system with the lower tie rod (52), clamp and lock the main rib (2), and fix the two ends of the upper tie rod (51) and the lower tie rod (52) with the fixing nut (53); Step 7: Pour concrete.

7. The construction method of the positioning connection device for stiffened columns and frame beams according to claim 6, characterized in that: In step three, the initial tightening torque is 40%-60% of the final tightening torque to ensure that the angle steel (3) can be slightly adjusted along the first elongated hole (311).

8. The construction method of the positioning connection device for stiffened columns and frame beams according to claim 7, characterized in that: In step four, the elevation deviation is controlled within ±5mm.

9. A construction method for a positioning connection device between a stiffened column and a frame beam according to claim 8, characterized in that: In step five, the end embedded plate (6) of the main reinforcement (2) of the frame beam is precisely connected with the second side plate (32) of the angle steel (3) to ensure that the axis of the main reinforcement (2) is consistent with the design axis of the beam, and to verify the spacing of the main reinforcement (2) and the thickness of the protective layer.

10. A construction method for a positioning connection device between a stiffened column and a frame beam according to claim 9, characterized in that: In step six, the high-strength bolt assembly (4) is finally tightened, and the nuts of the upper tie rod (51) and the lower tie rod (52) are tightened to complete the positioning and locking of the main rib (2).

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