Reinforcing steel bar fixed connection test device of component reinforcing steel bar joint
By designing a test device including transverse constraint plates and longitudinal constraint rods, the problems of high cost and long cycle in the existing technology of steel bar joint performance testing were solved, and efficient performance evaluation was achieved under simulated actual working conditions.
Patent Information
- Application Number
- CN202423031026.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Existing technologies cannot effectively simulate the actual working conditions of component steel bars during hoisting and connection, resulting in large differences between joint performance test results and actual conditions. In addition, existing test equipment is costly and time-consuming, and cannot meet the requirements of component steel bar connection technology.
A test device is designed, which includes a transverse constraint plate, a longitudinal constraint rod, a transverse constraint rod, a transverse constraint nut, a longitudinal fixing nut and a steel bar fixing nut. The device can simulate the actual working conditions of steel bar components during lifting and connection, adjust the longitudinal deviation and eccentric distance of the longitudinal steel bar, and increase the free section distance of the longitudinal steel bar.
It realizes the effective testing of the performance of component steel bar joints under the simulation of actual connection conditions, reduces the test cost, improves the test efficiency, and meets the performance evaluation requirements of the component steel bar connection process.
Smart Images
Figure CN223426244U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a steel bar fixed connection test device for component steel bar joints. Background Art
[0002] In recent years, with the development of building industrialization, the use of componentized and modularized steel reinforcement processes has become increasingly popular. This process involves prefabricating a steel reinforcement skeleton at the construction site to form component reinforcements, which are then hoisted to the structural installation site for connection. This significantly reduces the workload of on-site reinforcement work and can effectively increase the number of on-site workers and the construction speed of large concrete structures. However, when the component reinforcements are connected at the installation site, there is a certain amount of axial clearance and radial deviation between the ends of the connecting reinforcements. When the reinforcements are connected using mechanical joints, this eccentric connection with gapped reinforcements at the ends needs to be completed under the rigid constraints of the reinforcement skeleton. During connection, the reinforcement cannot rotate or move longitudinally. Current industry standards specify the performance of mechanical joints and joint performance test methods. However, when preparing joint specimens for performance testing, the reinforcement is allowed to be in a free state, without any constraints, and can rotate and move arbitrarily. Therefore, the joint performance reflected in the test results is also the performance of the specimen connected with free reinforcement. Partial steel bars connect the steel bars under a constrained state, and the eccentricity of the butt steel bars needs to be corrected before they can be connected. The gaps at the ends of the steel bars are also eliminated by the compensation function of the connector design. Therefore, the connection state of the mechanical joints of the partial steel bars is very different from that of the free steel bars. The existing method of making free steel bars for joint specimens cannot represent the mechanical joints of steel bars completed under the condition of partial steel bar connection. In order to study the performance of mechanical connection joints of partial steel bars, some construction units make test units that simulate physical structures to conduct steel bar connection tests. However, test units that simulate physical structures not only waste materials and have high production costs, but also have a long production cycle, and cannot meet the increasing demand for the performance of mechanical connection joints of partial steel bars. Therefore, a test device with strong versatility, ease of use, and low cost is urgently needed to develop more and more convenient test devices for the connection process and joint performance of partial steel bars. Utility Model Content
[0003] The utility model provides a steel bar fixed connection test device for component steel bar joints, which can simulate the actual working conditions of steel bar components during hoisting connection, can adjust the longitudinal deviation and eccentric distance of the longitudinal steel bars, and can simulate the free section distance of the longitudinal steel bars that needs to be removed during actual connection to increase the degree of freedom of the longitudinal steel bars.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] A steel bar fixed connection test device for a component steel bar joint comprises: a transverse restraint plate, a longitudinal restraint rod, a transverse restraint rod, a transverse restraint nut, a longitudinal fixing nut and a steel bar fixing nut, and is characterized in that:
[0006] The structures of the pair of transverse restraint plates are mirror images of each other. A pair of restraint rod mounting holes are respectively provided at the same position at both ends of the transverse restraint plates for inserting the longitudinal restraint rods. The restraint rod mounting holes on the same side are arranged along the width direction of the transverse restraint plates. Two rows of steel bar mounting holes are longitudinally and parallelly provided between the restraint rod mounting holes on both sides for inserting the steel bars of the joint specimens.
[0007] The two ends of the longitudinal restraint rod and the transverse restraint rod are respectively provided with straight threads, the transverse restraint plates are respectively provided at the two ends of the longitudinal restraint rod, the straight threads at the two ends of the longitudinal restraint rod are respectively inserted into the restraint rod mounting holes corresponding to the mirror images of the transverse restraint plates, and the straight threads at the two ends of the longitudinal restraint rod are respectively provided with a pair of longitudinal fixing nuts on the inner side and the outer side of the transverse restraint plate for fixed connection between the transverse restraint plate and the longitudinal restraint rod;
[0008] The non-joint connection end of the joint specimen steel bar is provided with a straight thread for fixing, and is inserted into the steel bar installation hole. The straight thread for fixing the joint specimen steel bar is provided with a pair of steel bar fixing nuts on the inner side and the outer side of the transverse constraint plate, respectively, for fixing the joint specimen steel bar to the test installation position of the transverse constraint plate;
[0009] The transverse constraint rod is arranged parallel to the plate surface of the transverse constraint plate and overlapped on the longitudinal constraint rod. The transverse constraint nuts are respectively provided at both ends of the transverse constraint rod. The inner end face of the transverse constraint nut is fastened against the outer side of the longitudinal constraint rod. The transverse constraint rod is also fixed to the steel bar of the joint specimen by tying steel wire.
[0010] The steel bar fixing connection test device of the component steel bar joint, wherein: the steel bar installation hole is a round hole or a long hole, and the minimum hole diameter of the steel bar installation hole is slightly larger than the outer diameter of the fixing straight thread of the joint specimen steel bar.
[0011] The steel bar fixed connection test device of the component steel bar joint, wherein: the length of the exposed part of the straight thread of the longitudinal restraint rod in the restraint rod mounting hole is not less than the thickness of the longitudinal fixing nut.
[0012] The steel bar fixing connection test device of the component steel bar joint, wherein: the outer diameter of the steel bar fixing nut is at least 5 mm larger than the diameter of the steel bar installation hole.
[0013] The steel bar fixed connection test device of the component steel bar joint, wherein: the diameter of the longitudinal restraint rod is the same as or similar to the diameter of the steel bar of the joint specimen.
[0014] The steel bar fixed connection test device of the component steel bar joint is characterized in that the restraint rod installation hole is an open long hole.
[0015] The beneficial effects of the present invention are as follows: it can simulate the actual working conditions of steel bar components during hoisting and connection, can adjust the longitudinal deviation and eccentric distance of the longitudinal steel bars, and can simulate the need to remove stirrups during actual connection to increase the free section distance of the longitudinal steel bars. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a structural diagram of the steel bar fixed connection test device for component steel bar joints.
[0017] Figure 2 This is the structural diagram of the transverse restraint plate.
[0018] Explanation of the reference numerals: 1-transverse constraint plate; 2-longitudinal constraint rod; 3-transverse constraint rod; 4-transverse constraint nut; 5-longitudinal fixing nut; 6-rebar fixing nut; 7-binding steel wire; 8-joint specimen steel bar; 11-constraint rod mounting hole; 12-rebar mounting hole. DETAILED DESCRIPTION
[0019] like Figures 1 to 2 As shown, a steel bar fixed connection test device for a component steel bar joint includes: a transverse constraint plate 1, a longitudinal constraint rod 2, a transverse constraint rod 3, a transverse constraint nut 4, a longitudinal fixing nut 5 and a steel bar fixing nut 6.
[0020] A pair of transverse constraint plates 1 have mirror-image structures, and a pair of constraint rod mounting holes 11 are respectively provided at the same position at both ends of the transverse constraint plate 1. The constraint rod mounting holes 11 are open long holes for the longitudinal constraint rod 2 to be inserted. The constraint rod mounting holes 11 on the same side are arranged along the width direction of the transverse constraint plate 1, and two rows of steel bar mounting holes 12 are longitudinally and parallelly provided between the constraint rod mounting holes 11 on both sides for the joint specimen steel bars 8 to be inserted. The steel bar mounting holes 12 are round holes or long holes, and the minimum aperture of the steel bar mounting holes 12 is slightly larger than the outer diameter of the fixing straight thread of the joint specimen steel bar 8. The diameter of the longitudinal constraint rod 2 is the same as or similar to the diameter of the joint specimen steel bar 8.
[0021] Straight threads are respectively provided at both ends of the longitudinal restraint rod 2 and the transverse restraint rod 3, and the transverse restraint plates 1 are respectively provided at both ends of the longitudinal restraint rod 2. The straight threads at both ends of the longitudinal restraint rod 2 are respectively inserted into the restraint rod mounting holes 11 corresponding to the mirror images of the transverse restraint plates 1. The straight threads at both ends of the longitudinal restraint rod 2 are respectively provided with a pair of longitudinal fixing nuts 5 on the inner and outer sides of the transverse restraint plate 1 for fixed connection between the transverse restraint plate 1 and the longitudinal restraint rod 2. The length of the exposed part of the straight threads of the longitudinal restraint rod 2 in the restraint rod mounting hole 11 is not less than the thickness of the longitudinal fixing nuts 5.
[0022] The non-joint connection end of the joint specimen steel bar 8 is provided with a straight thread for fixing and is inserted into the steel bar mounting hole 12. The straight thread for fixing of the joint specimen steel bar 8 is respectively provided with a pair of steel bar fixing nuts 6 on the inner and outer sides of the transverse constraint plate 1 for fixing the joint specimen steel bar 8 to the test installation position of the transverse constraint plate 1. The outer diameter of the steel bar fixing nut 6 is at least 5 mm larger than the diameter of the steel bar mounting hole 12.
[0023] The transverse constraint rod 3 is arranged parallel to the plate surface of the transverse constraint plate 1 and overlapped on the longitudinal constraint rod 2. The transverse constraint nuts 4 are respectively provided at both ends of the transverse constraint rod 3. The inner end face of the transverse constraint nut 4 is fastened against the outer side of the longitudinal constraint rod 2. The transverse constraint rod 3 is also fixed to the joint specimen steel bar 8 by tying steel wire 7.
[0024] In the embodiment, a pair of longitudinal fixing nuts 5 are respectively provided at both ends of the longitudinal constraint rod 2, and the straight thread of the longitudinal constraint rod 2 is inserted into the constraint rod mounting hole 11 of the transverse constraint plate 1. A rectangle is formed by the pair of longitudinal constraint rods 2 and the pair of transverse constraint plates 1. The pair of longitudinal fixing nuts 5 are respectively located on the inner and outer sides of the transverse constraint plate 1, and the transverse constraint plate 1 is fixedly connected to the longitudinal constraint rod 2 by the longitudinal fixing nuts 5. After the joint specimen steel bars 8 to be connected are pre-installed and fixed through the joint connector in a pair as a group, a steel bar fixing nut 6 is respectively provided at both ends of the joint specimen steel bars 8. The joint specimen steel bars 8 are inserted into the steel bar mounting hole 12 of the transverse constraint plate 1. The straight thread of the joint specimen steel bar 8 is fixed on the exposed part of the steel bar mounting hole 12 and another steel bar fixing nut 6 is provided. At this time, the joint specimen steel bar 8 is preliminarily fixed to the transverse constraint plate 1. Then, according to the steel bar axial gap and axis eccentricity value of the test design, the longitudinal position and transverse position of each joint specimen steel bar 8 are adjusted. The longitudinal position is achieved by adjusting the steel bar located at the transverse constraint The steel bar fixing lock nut 6 on the inner and outer sides of the plate 1 is carried out, and the transverse position is carried out by adjusting the position of the joint specimen steel bar 8 in the steel bar mounting hole 12. According to the transverse constraint position requirements of the designed joint specimen steel bar 8, the transverse constraint rod 3 is overlapped with the longitudinal constraint rod 2 and the joint specimen steel bar 8. Transverse constraint nuts 4 are respectively provided at both ends of the transverse constraint rod 3. The transverse constraint rod 3 is also fixed to the joint specimen steel bar 8 by tying steel wire 7, and the transverse constraint nut 4 is tightened. The inner end face of the transverse constraint nut 4 is aligned with the longitudinal constraint rod 2 and the joint specimen steel bar 8. The outer sides of the longitudinal restraint rod 2 are tightened against each other. If necessary, the longitudinal restraint rod 2 and the transverse restraint rod 3 can be tied and fixed by the binding wire 7. At this time, the steel bar fixed connection test device is fixed, and the subsequent connection test of the joint connector can be carried out. After the connection test of the joint connector is completed, the longitudinal fixing nut 5 and the steel bar fixing lock nut 6 located on the outer side of the transverse restraint plate 1 are first removed, and the longitudinal restraint rod 2 and the joint specimen steel bar 8 are separated from the transverse restraint plate 1. Finally, the joint connector on the joint specimen steel bar 8 is separated and removed.
[0025] The steel bar installation holes 12 on the transverse restraint plate 1 can all be used to install the joint specimen steel bars 8, or the longitudinal restraint rods 2, and the specific use can be selected according to needs.
[0026] The above embodiments are merely illustrative of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art may make simple changes or substitutions based on the above embodiments without departing from the technical concept of the present invention, and these changes still fall within the scope of protection of the present invention.
Claims
1. A steel bar fixed connection test device for a component steel bar joint, comprising: The transverse restraining plate (1), the longitudinal restraining rod (2), the transverse restraining rod (3), the transverse restraining nut (4), the longitudinal fixing nut (5) and the steel bar fixing nut (6) are characterized by: The structures of the pair of transverse constraint plates (1) are mirror images of each other. A pair of constraint rod mounting holes (11) are respectively provided at the same position at both ends of the transverse constraint plate (1) for inserting the longitudinal constraint rod (2). The constraint rod mounting holes (11) on the same side are arranged along the width direction of the transverse constraint plate (1). Two rows of steel bar mounting holes (12) are longitudinally and parallelly provided between the constraint rod mounting holes (11) on both sides for inserting the joint specimen steel bars (8). The two ends of the longitudinal restraint rod (2) and the transverse restraint rod (3) are respectively provided with straight threads, the transverse restraint plates (1) are respectively provided at the two ends of the longitudinal restraint rod (2), the straight threads at the two ends of the longitudinal restraint rod (2) are respectively inserted into the restraint rod mounting holes (11) mirror-imaged to the transverse restraint plates (1), and the straight threads at the two ends of the longitudinal restraint rod (2) are respectively provided with a pair of longitudinal fixing nuts (5) on the inner side and the outer side of the transverse restraint plate (1) for fixed connection between the transverse restraint plate (1) and the longitudinal restraint rod (2); The non-joint connection end of the joint specimen steel bar (8) is provided with a fixing straight thread and is inserted into the steel bar installation hole (12). The fixing straight thread of the joint specimen steel bar (8) is provided with a pair of steel bar fixing nuts (6) on the inner side and the outer side of the transverse constraint plate (1) respectively, so as to fix the joint specimen steel bar (8) on the test installation position of the transverse constraint plate (1); The transverse restraint rod (3) is arranged parallel to the plate surface of the transverse restraint plate (1) and overlapped on the longitudinal restraint rod (2). The transverse restraint nuts (4) are respectively arranged at both ends of the transverse restraint rod (3). The inner end surface of the transverse restraint nut (4) is abutted and fastened against the outer side of the longitudinal restraint rod (2). The transverse restraint rod (3) is also tied and fixed to the joint specimen steel bar (8) by tying steel wire (7).
2. The steel bar fixed connection test device for a component steel bar joint according to claim 1, characterized in that: The steel bar installation hole (12) is a circular hole or a long hole, and the minimum hole diameter of the steel bar installation hole (12) is slightly larger than the outer diameter of the fixing straight thread of the joint test piece steel bar (8).
3. The steel bar fixed connection test device for a component steel bar joint according to claim 1, characterized in that: The length of the exposed portion of the straight thread of the longitudinal restraining rod (2) in the restraining rod mounting hole (11) is not less than the thickness of the longitudinal fixing nut (5).
4. The steel bar fixed connection test device for a component steel bar joint according to claim 1, characterized in that: The outer diameter of the steel bar fixing nut (6) is at least 5 mm greater than the diameter of the steel bar mounting hole (12).
5. The steel bar fixed connection test device for a component steel bar joint according to claim 1, characterized in that: The diameter of the longitudinal restraining rod (2) is the same as or similar to the diameter of the joint specimen steel bar (8).
6. The steel bar fixed connection test device for a component steel bar joint according to claim 1, characterized in that: The restraining rod mounting hole (11) is an open long hole.