Prestress assembly type beam-column joint intelligent tensioning device

Abstract

The invention relates to the technical field of building supporting piece connection, in particular to a prestress assembly type beam-column joint intelligent tensioning device which comprises a tensioning anchorage device, an energy dissipation assembly and a conduction assembly. The tensioning anchorage device is connected with the steel strand; the energy dissipation assembly penetrates through the tensioning anchorage device to connect the prefabricated beam and the prefabricated column. The conduction assembly is connected between the tensioning anchorage device and the energy consumption assembly; when an earthquake occurs, extra tensioning force generated when the tensioning plate generates a trend of moving in the steel strand tensioning direction can be converted into vertical pulling force on the energy dissipation bar through rotation of the tension bar, and the rotation center of the tension bar can be changed along with movement of the tensioning plate, so that a steel strand tensioning force arm is increased, and a bending force arm of the energy dissipation bar is reduced; at the moment, the tension force is amplified through the tension bar, so that the bending tension force on the energy consumption bar is increased, and the energy consumption bar can stably consume energy; the problem that when an earthquake occurs, the steel strand is in a tensioned state, so that the energy consumption rod cannot enter a yield state, and the steel strand is fractured before the energy consumption rod is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of building support member connection, and in particular to a prestressed assembled beam-column node intelligent tensioning device. Background Art

[0002] Prestressed prefabricated beam-column nodes are key structural nodes that connect precast concrete beams and columns through post-tensioning prestressing. The use of prestressed prefabricated beam-column nodes can be quickly assembled through post-tensioning prestressed tendons, without the need for cast-in-place concrete curing, which can significantly shorten the construction period. Compared with cast-in-place nodes, they have good self-resetting ability and low residual deformation characteristics. At present, prestressed prefabricated beam-column nodes have become a new development trend in the construction industry.

[0003] At present, when connecting precast beams and columns, prestressed tendons are mostly arranged along the length of the precast beams. The prestressed tensile force is high, the workload of punching the prestressed tendons is large, and the post-tensioning prestress significantly affects the overall load-bearing performance of the precast beams. Due to the presence of prestressed tendons, although the structure has a high deformation recovery ability, its energy consumption capacity is relatively weak, so corresponding measures need to be taken to improve its energy consumption level. Traditional energy-absorbing elements can usually only be designed for a specific seismic resistance level. When facing earthquakes below this level, they often cannot play their due energy-absorbing role. The existing technology has proposed a good solution to this problem, such as a local prestressed assembled energy-absorbing beam-column node with patent publication number CN105525679A. By reserving prestressed tendon holes and corbels in the beam-column connection area of ​​the precast concrete column, the precast concrete beam is placed on the corbels and fixed by post-tensioned prestressed tendons. At the same time, removable energy-absorbing rods are installed in the node connection area to enhance the energy absorption capacity; thereby improving the seismic performance and recoverability of the structure, facilitating post-earthquake repair, and reducing costs and the workload of prestressed tendon perforation.

[0004] Although the existing technology has solved the problems of weak energy absorption capacity of prestressed assembled beam-column nodes, inability to effectively resist earthquakes in the face of non-specific earthquake resistance levels, and large workload of prestressed tendon punching, the following problems still exist: At present, the tensioning device of prestressed assembled beam-column nodes mainly applies tension to the steel strands through a jack and then uses a clip anchor to lock it, and energy-absorbing rods are arranged next to the steel strands. When an earthquake occurs, the energy-absorbing rods absorb the impact by deformation to prevent the beam-column node from being damaged; however, when an earthquake occurs, the steel strands will tighten the beams and columns, resulting in excessive rigidity of the beam-column node, and the energy-absorbing rods cannot enter the yield state and cannot dissipate energy normally. At this time, the vibration energy will be absorbed by the beam-column node, and the steel strands will break first, thereby causing the beam-column node to break, and it cannot effectively resist earthquakes.

[0005] In view of the above situation, in order to overcome the above technical problems, the present invention designs a prestressed assembled beam-column node intelligent tensioning device. Summary of the Invention

[0006] The present invention provides a prestressed assembled beam-column node intelligent tensioning device, which solves the problem that when an earthquake occurs, the steel strands are in a tensioned state, which will cause the energy-absorbing rods to be unable to enter the yield state, thereby causing the steel strands to break before the energy-absorbing rods. By setting a movable tensioning plate, the tensioning plate will apply pre-tensioning force to all steel strands when no earthquake occurs, and when an earthquake occurs, the tensioning plate will generate a movement trend in the tensioning direction of the steel strands. The generated additional tensioning force will be converted into a vertical tension on the energy-absorbing rods through the rotation of the tension rods, and after the tensioning plate moves, the rotation center of the tension rods will be changed, so that the tensioning arm of the steel strands increases, while the bending arm of the energy-absorbing rods decreases. At this time, the tensioning force will be amplified by the tension rods, thereby increasing the bending tension on the energy-absorbing rods, so that the energy-absorbing rods can smoothly enter the yield state and dissipate the earthquake energy, thereby avoiding the steel strands from being broken before the energy-absorbing rods.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A prestressed assembled beam-column node intelligent tensioning device; comprising a prefabricated beam, a prefabricated column, a pre-tensioning channel and a steel strand, and also comprising a tensioning anchor, an energy-absorbing component and a conduction component; the tensioning anchor is connected to the steel strand, and when an earthquake occurs, the steel strand is subjected to tensioning force, driving the tensioning anchor to slide in the tensioning direction; the energy-absorbing component connects the prefabricated beam and the prefabricated column through the tensioning anchor; the conduction component is connected between the tensioning anchor and the energy-absorbing component, and the sliding of the tensioning anchor changes the rotation center of the conduction component and drives the conduction component to rotate, and the rotation of the conduction component applies tension to the energy-absorbing component and applies a thrust to the tensioning anchor in the opposite direction of its movement.

[0009] Preferably, the tensioning anchor includes an anchor plate, a tensioning plate, a tensioning clip and a tensioning disc spring; the anchor plate is connected to the prefabricated column, and a sliding track is provided on the anchor plate; the tensioning plate is slidably installed in the sliding track, and a tensioning hole for the steel strand to pass through is provided on the tensioning plate; the tensioning clip is sleeved on the outside of the steel strand and installed in the tensioning hole through a threaded connection; the tensioning disc spring is connected between the tensioning plate and the anchor plate.

[0010] In the above scheme, the steel strands will maintain tension on the steel strands through the tensioning plates and tensioning clips under normal working conditions. At this time, the steel strands are in a taut state, which can provide good holding force for the beam-column joints. However, when an earthquake occurs, if the steel strands are still in a taut state, they will be subjected to the earthquake energy and break. Since the tensioning clips are improved to a structure that can slide with the reset ring, the tensioning plate will displace when an earthquake occurs. If the direction of displacement is the tensile direction of the steel strands, the tensioning plate will push the conductive component to pull the energy-absorbing component, and convert the displacement of the tensioning plate into a shear force on the energy-absorbing rod, so that the energy-absorbing rod can quickly enter the yield state.

[0011] Preferably, a sliding inclined surface is provided on the sliding track; self-locking inclined surfaces are provided on the upper and lower ends of the tensioning plate; and the angle between the sliding inclined surface and the horizontal plane is greater than the angle between the self-locking inclined surface and the horizontal plane.

[0012] In the above solution, the self-locking inclined surface and the sliding inclined surface can gradually increase the resistance of the tensioning plate to the tensioning direction when an earthquake occurs, forming a self-locking effect, thereby preventing the steel strands from breaking.

[0013] Preferably, the energy-absorbing component includes an energy-absorbing rod, a push-up slider, a tension rod and a self-locking spring; an energy-absorbing hole is provided on the anchor plate, and push-up slots are symmetrically provided on both sides of the anchor plate; the energy-absorbing rod is installed in the energy-absorbing hole; the push-up slider is slidably installed in the push-up slot; the tension rod is connected to the push-up slider; the self-locking spring is connected between the push-up slider and the push-up slot.

[0014] In the above scheme, when an earthquake occurs, if the steel strand is subjected to a greater tensioning force, causing the tensioning plate to move in the tensioning direction, the tensioning plate will cause the upper push-up slider to move upward, while the lower push-up slider will move downward. At this time, the push-up slider will generate a bending and deforming tension on the energy-absorbing rod through the tension rod, so that the energy-absorbing rod can bend and deform to consume earthquake energy, thereby avoiding breakage of the steel strand.

[0015] Preferably, there are two groups of energy-consuming holes, which are symmetrically arranged at the upper and lower parts of the anchor plate, and the upper energy-consuming holes are located at a higher height than the highest tensioning holes, while the lower energy-consuming holes are located at a lower height than the lowest tensioning holes.

[0016] In the above scheme, among the upper and lower groups of energy-absorbing rods, the height of the energy-absorbing rods on the upper side is higher than the height of the steel strands at the highest position, while the height of the energy-absorbing rods on the lower side is lower than the height of the steel strands at the lowest position. When an earthquake occurs and relative displacement occurs between the prefabricated beams and prefabricated columns, the energy-absorbing rods will be subjected to force before the steel strands, thereby preventing the steel strands from being broken.

[0017] Preferably, the conduction assembly includes a transverse push block, a fulcrum seat and a conduction pull rod; the transverse push block is arranged on both sides of the tensioning plate; a sliding support groove is provided on the tension rod; one end of the fulcrum seat is connected to the transverse push block, and the other end is installed in the sliding support groove; one end of the conduction pull rod is connected to the tension rod, and the other end is connected to the energy dissipation rod.

[0018] In the above scheme, when the transverse push block moves in the tensioning direction, it will drive the fulcrum seat to move in the tensioning direction (that is, move in the direction of the conductive pull rod). At this time, the distance between the fulcrum seat and the conductive pull rod gradually decreases, and the distance between the fulcrum seat and the transverse push block gradually increases, which will form a large tensioning arm of the steel strand and a small bending arm of the energy-absorbing rod. The increase in the tensioning force on the steel strand can be regarded as the displacement distance of the tensioning plate in the tensioning direction. At this time, due to the large tensioning arm, the steel strand can generate a larger bending tension on the energy-absorbing rod when subjected to a smaller excess tension (exceeding the tensioning force of the initial pre-tensioning tension), so that the energy-absorbing rod quickly enters the yield state and consumes seismic energy.

[0019] Preferably, the lifting slide block is provided with a lifting inclined surface; the transverse inclined surfaces are symmetrically provided on the upper and lower sides of the transverse push block; and the angle between the lifting inclined surface and the horizontal plane is greater than 45 degrees.

[0020] In the above scheme, the angle between the pushing slope and the horizontal plane is greater than 45 degrees. On the one hand, the rising distance of the pushing slope when it is squeezed is greater than the horizontal movement distance of the transverse push block, so that when the tensioning plate is displaced for a short distance, the vertical displacement distance of the pushing slider can be amplified, so that the tension rod can be flipped at a large angle, thereby increasing the pulling force on the end of the energy-absorbing rod, so that the energy-absorbing rod can enhance its energy absorption capacity and help the steel strand to bear the seismic energy; on the other hand, when no earthquake occurs in normal times, the angle greater than 45 degrees can enhance the self-locking ability, and a larger tensioning force is required to enable the tensioning plate to move in the tensioning direction, so that it can remain in the initial pre-tightened position to avoid the steel strand from breaking.

[0021] Preferably, the stiffness of the conductive pull rod and the tension rod is greater than the stiffness of the energy dissipation rod.

[0022] In the above scheme, in order to prevent the conductive pull rod and the tension rod from breaking before the energy dissipation rod during the force process during an earthquake, their stiffness is increased to exceed the stiffness of the energy dissipation rod, ensuring that the energy dissipation work can proceed normally when an earthquake occurs.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Compared with the existing beam-column node tensioning device, the present invention provides a tensioning plate that can move in the horizontal direction. When an earthquake does not occur, the tensioning plate will keep the steel strand in a pre-tightened state under the elastic force of the tensioning disc spring. When an earthquake occurs, when the tensioning plate displaces in the tensioning direction of the steel strand, it will squeeze the push-up slider, causing the push-up slider to displace radially. At this time, the push-up slider will cause the tension rod to rotate. When the tension rod rotates, it generates a vertical tension on the energy-absorbing rod through the transmission pull rod, thereby converting the tension force on the steel strand into the breaking force of the energy-absorbing rod, so that the energy-absorbing rod can smoothly enter the yield state, withstand the earthquake energy, and avoid the steel strand from breaking before the energy-absorbing rod.

[0025] 2. The present invention connects the fulcrum seat and the tensioning plate through a transverse push block. When the transverse push block moves in the tensioning direction, it will drive the fulcrum seat to move in the direction of the conductive pull rod. At this time, the distance between the fulcrum seat and the conductive pull rod gradually decreases, while the distance between the fulcrum seat and the transverse push block gradually increases, forming a state where the tensioning force arm of the steel strand is large and the bending force arm of the energy dissipation rod is small. At this time, under the lever effect, the energy dissipation rod will be able to smoothly enter the yield state, and the energy dissipation rod will withstand more seismic energy than the steel strand, and the force arm will change slowly and dynamically, rather than being in a fixed position with the maximum amplification ratio at the beginning, which can effectively avoid the energy dissipation rod from being directly brittlely broken due to excessive instantaneous tension. At the same time, since the moving speed of the fulcrum will decrease with the gradual bending of the energy dissipation rod, and the friction between the self-locking inclined surface and the sliding inclined surface increases, the tensioning force required for the tensioning plate to move in the tensioning direction can be further doubled, thereby gradually reducing the increasing speed of the tension amplification ratio and achieving stable energy dissipation.

[0026] 3. The present invention provides a lifting slope on the lifting slider, and symmetrically provides transverse inclined planes on the upper and lower sides of the transverse push block, and the angle between the lifting slope and the horizontal plane is greater than 45 degrees, so that the lifting slope rises when it is squeezed. The distance that the lifting slope moves is greater than the horizontal distance of the transverse push block, so that when the tensioning plate is displaced for a short distance, the vertical displacement distance of the lifting slider can be amplified, so that the tension rod can be flipped at a large angle, thereby increasing the tension on the end of the energy-absorbing rod, so that the energy-absorbing rod can enhance its energy absorption capacity and help the steel strand to bear the seismic energy; on the other hand, when there is no earthquake in normal times, the angle greater than 45 degrees can enhance the self-locking ability, and a larger tensioning force is required to make the tensioning plate move in the tensioning direction, so that it can remain in the initial pre-tightened position to avoid the steel strand from being broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is the overall structural diagram of the present invention;

[0029] Figure 2 This is a cross-sectional view of the steel strand installation structure of the present invention;

[0030] Figure 3 for Figure 2 A magnified view of the structure at center A;

[0031] Figure 4 A cross-sectional view of the sliding track of the present invention;

[0032] Figure 5 for Figure 4 A magnified view of the structure at point B in the middle;

[0033] Figure 6 This is a schematic diagram of the internal structure of the push-up chute of the present invention;

[0034] Figure 7 A cross-sectional view showing the connection relationship between the energy dissipation component and the conduction component of the present invention;

[0035] Figure 8 for Figure 7 A magnified view of the structure at point C in the middle;

[0036] Figure 9 A diagram showing the movement trends of the components of the present invention when an earthquake occurs;

[0037] In the figure: 1. Precast beam; 2. Precast column; 3. Pre-tightening channel; 4. Steel strand; 5. Tensioning anchor; 51. Anchor plate; 511. Sliding track; 5111. Sliding slope; 512. Energy dissipation hole; 513. Push-up slide; 52. Tensioning plate; 521. Tensioning hole; 522. Self-locking slope; 53. Tensioning clip; 54. Tensioning disc spring; 6. Energy dissipation component; 61. Energy dissipation rod; 62. Push-up slider; 621. Push-up slope; 63. Tension rod; 631. Sliding support groove; 64. Self-locking spring; 7. Transmission component; 71. Transverse push block; 711. Transverse slope; 72. Support seat; 73. Transmission rod. DETAILED DESCRIPTION

[0038] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0039] See also Figures 1 to 9 The present invention provides a prestressed assembled beam-column node intelligent tensioning device, the technical solution is as follows:

[0040] As a specific embodiment of the present invention, refer to Figure 1 and Figure 2 , a prestressed assembled beam-column node intelligent tensioning device; it includes a prefabricated beam 1, a prefabricated column 2, a prestressing channel 3 and a steel strand 4, the prestressing channel 3 is opened on the prefabricated column 2, and the steel strand 4 is arranged through the prestressing channel 3, and also includes a tensioning anchor 5, an energy dissipation component 6 and a conduction component 7; the tensioning anchor 5 is connected to the steel strand 4, and the tensioning anchor 5 is connected to the prefabricated beam 1. When an earthquake occurs, the steel strand 4 is subjected to the tensioning force and drives the tensioning anchor 5 to slide in the tensioning direction; the energy dissipation component 6 passes through the tensioning anchor 5 to connect the prefabricated beam 1 and the prefabricated column 2; the conduction component 7 is connected between the tensioning anchor 5 and the energy dissipation component 6, the sliding of the tensioning anchor 5 changes the rotation center of the conduction component 7 and drives the conduction component 7 to rotate, and the rotation of the conduction component 7 applies tension to the energy dissipation component 6 and applies a thrust to the tensioning anchor 5 in the opposite direction of its movement.

[0041] As a specific embodiment of the present invention, refer to Figure 1 、 Figure 2 and Figure 3 The tensioning anchor 5 includes an anchor plate 51, a tensioning plate 52, a tensioning clip 53 and a tensioning disc spring 54; the anchor plate 51 is connected to the prefabricated column 2, and a sliding track 511 is provided on the anchor plate 51; the tensioning plate 52 is slidably installed in the sliding track 511, and a tensioning hole 521 for the steel strand 4 to pass through is provided on the tensioning plate 52; the tensioning clip 53 is sleeved on the outside of the steel strand 4 and is installed in the tensioning hole 521 through a threaded connection; the tensioning disc spring 54 is connected between the tensioning plate 52 and the anchor plate 51. The steel strand 4 will maintain tension on the steel strand 4 under normal working conditions through the tensioning plate 52 and the tensioning clip 53, and the elastic tensioning force provided by the tensioning disc spring 54 can ensure that the steel strand 4 is in a taut state under normal working conditions, and can provide good holding force for the beam-column node. However, when an earthquake occurs, if the steel strand 4 still remains in a taut state, it will be subjected to the earthquake energy and break. Since the tensioning clip 53 is improved to a structure that can slide with the reset ring, the tensioning plate 52 will be displaced when an earthquake occurs. If the direction of displacement is the tensile direction of the steel strand 4, the tensioning plate 52 will push the conductive component 7 to pull the energy dissipation component 6, and convert the displacement of the tensioning plate 52 into a shear force on the energy dissipation rod 61, so that the energy dissipation rod 61 can quickly enter the yield state.

[0042] As a specific embodiment of the present invention, refer to Figure 3 、 Figure 4 and Figure 5The sliding rail 511 is provided with a sliding inclined surface 5111; the tensioning plate 52 is provided with self-locking inclined surfaces 522 at the upper and lower ends; the angle between the sliding inclined surface 5111 and the horizontal plane is greater than the angle between the self-locking inclined surface 522 and the horizontal plane. The self-locking inclined surface 522 and the sliding inclined surface 5111 gradually increase the resistance of the tensioning plate 52 in the tensioning direction during an earthquake, forming a self-locking effect, thereby preventing the steel strand 4 from breaking; the surface roughness of the self-locking inclined surface 522 and the sliding inclined surface 5111 can be set as large as possible to enhance the self-locking effect. After the steel strand 4 reaches the initial tension state, it becomes difficult to continue tensioning. Continuing tensioning requires additional friction between the self-locking inclined surface 522 and the sliding inclined surface 5111.

[0043] As a specific embodiment of the present invention, refer to Figure 1 、 Figure 4 、 Figure 6 and Figure 7 The energy dissipation assembly 6 includes an energy dissipation rod 61, a lifting slider 62, a tension rod 63, and a self-locking spring 64. The anchor plate 51 is provided with an energy dissipation hole 512, and lifting grooves 513 are symmetrically provided on both sides of the anchor plate 51. The energy dissipation rod 61 is installed in the energy dissipation hole 512. The lifting slider 62 is slidably installed in the lifting groove 513. The tension rod 63 is connected to the lifting slider 62. The self-locking spring 64 is connected between the lifting slider 62 and the lifting groove 513. When an earthquake occurs, if the steel strand 4 is subjected to an increased tensioning force, causing the tensioning plate 52 to move in the tensioning direction, the tensioning plate 52 will cause the upper lifting slider 62 to move upward, while the lower lifting slider 62 will move downward. At this time, the lifting slider 62 will generate a bending and deformation tension on the energy dissipation rod 61 through the tension rod 63, so that the energy dissipation rod 61 can bend and deform to consume earthquake energy, thereby preventing the steel strand 4 from breaking.

[0044] As a specific embodiment of the present invention, refer to Figure 1 and Figure 6 There are two groups of energy-dissipating holes 512, symmetrically located at the upper and lower portions of the anchor plate 51. The upper energy-dissipating holes 512 are located at a higher height than the highest tensioning holes 521, while the lower energy-dissipating holes 512 are located at a lower height than the lowest tensioning holes 521. Of the upper and lower groups of energy-dissipating rods 61, the upper energy-dissipating rods 61 are located at a higher height than the highest steel strands 4, while the lower energy-dissipating rods 61 are located at a lower height than the lowest steel strands 4. When relative displacement occurs between the precast beam 1 and the precast column 2 during an earthquake, the energy-dissipating rods 61 will be stressed before the steel strands 4, preventing them from breaking.

[0045] As a specific embodiment of the present invention, refer to Figure 4 、 Figure 6 and Figure 7 The conduction assembly 7 includes a transverse push block 71, a fulcrum seat 72 and a conduction pull rod 73; the transverse push block 71 is arranged on both sides of the tensioning plate 52; a sliding support groove 631 is provided on the tension rod 63; one end of the fulcrum seat 72 is connected to the transverse push block 71, and the other end is installed in the sliding support groove 631; one end of the conduction pull rod 73 is connected to the tension rod 63, and the other end is connected to the energy dissipation rod 61. When the transverse push block 71 moves in the tensioning direction, it will drive the fulcrum seat 72 to move in the tensioning direction (that is, move in the direction of the conductive pull rod 73). At this time, the distance between the fulcrum seat 72 and the conductive pull rod 73 gradually decreases, while the distance between the fulcrum seat 72 and the transverse push block 71 gradually increases. At this time, the steel strand 4 will form a large tensioning force arm, while the energy dissipation rod 61 will have a small bending force arm. The increase in the tensioning force on the steel strand 4 can be regarded as the displacement distance of the tensioning plate 52 in the tensioning direction. At this time, due to the large tensioning force arm, the steel strand 4 can be subjected to a smaller excess tensioning force (exceeding the tensioning force of the initial pre-tensioning tension part) when the energy dissipation rod 61 is bent. A greater bending tension is generated, so that the energy-absorbing rod 61 quickly enters the yield state and consumes the seismic energy; the fulcrum seat 72 can slide with the tensioning plate 52 instead of being set at the maximum amplification point at the beginning, so that the bending tension on the energy-absorbing rod 61 is gradually increased, thereby avoiding the energy-absorbing rod 61 from being subjected to excessive force instantaneously, resulting in direct brittle fracture, and in the process of movement of the tensioning plate 52, since the self-locking force between the self-locking inclined surface 522 and the sliding inclined surface 5111 is gradually increasing, the moving speed of the tensioning plate 52 can be slowed down, and then the increase rate of the tension amplification ratio is gradually reduced, thereby achieving smooth energy dissipation.

[0046] As a specific embodiment of the present invention, refer to Figure 6 、 Figure 7 、 Figure 8 and Figure 9The lifting slider 62 is provided with a lifting inclined surface 621; the transverse sliding block 71 is symmetrically provided with transverse sliding inclined surfaces 711 on the upper and lower sides; the angle between the lifting inclined surface 621 and the horizontal plane is greater than 45 degrees. The included angle between the pushing inclined surface 621 and the horizontal plane is greater than 45 degrees. On the one hand, the rising distance of the pushing inclined surface 621 when squeezed is greater than the horizontal movement distance of the transverse push block 71, so that when the tensioning plate 52 is displaced for a short distance, the vertical displacement distance of the pushing slider 62 can be amplified, so that the tension rod 63 can be flipped at a large angle, thereby increasing the tension on the end of the energy-absorbing rod 61, so that the energy-absorbing rod 61 can enhance the energy absorption capacity and help the steel strand 4 to bear the earthquake energy; on the other hand, when there is no earthquake in normal times, the included angle greater than 45 degrees can enhance the self-locking ability, and a greater tensioning force is required to make the tensioning plate 52 move in the tensioning direction, so that it can maintain the initial pre-tightening position to avoid the steel strand 4 from being broken; and the included angle between the pushing inclined surface 621 and the horizontal plane also needs to be less than 70 degrees. When the inclined surface approaches the vertical state, the allowed distance of horizontal displacement will be excessively shortened, and the structure will become unstable.

[0047] As a specific embodiment of the present invention, refer to Figure 7 and Figure 9 The stiffness of the conductive rod 73 and the tension rod 63 is greater than that of the energy dissipation rod 61. To prevent the conductive rod 73 and the tension rod 63 from breaking before the energy dissipation rod 61 during an earthquake, their stiffness is increased to exceed that of the energy dissipation rod 61. Furthermore, each connection location can be thickened, and both sides of the sliding support groove 631 of the tension rod 63 are also thickened to ensure that energy dissipation can function normally during an earthquake.

[0048] Working process: During installation, the steel strand 4 is passed through the pre-tensioning channel 3, and the tensioning clip 53 is installed on the tensioning plate 52. After the steel strand 4 passes through the anchor plate 51, the tensioning plate 52 and the tensioning clip 53, a jack is used to tension the steel strand 4 to a pre-tensioned state; when an earthquake occurs, the steel strand 4 is subjected to additional tensioning force, and the tensioning plate 52 moves toward the conductive pull rod 73. At this time, the tensioning plate 52 will drive the conductive component 7 to rotate and convert the additional tensioning force on the steel strand 4 into a bending tension on the energy dissipation rod 61.

[0049] Specifically, after the prefabricated column 2 and the prefabricated beam 1 are relatively fixed, the steel strand 4 is passed through the pre-tensioning channel 3, and the tensioning clip 53 is installed on the tensioning plate 52. After the steel strand 4 passes through the anchor plate 51, the tensioning plate 52 and the tensioning clip 53, the steel strand 4 is tensioned to a pre-tensioned state using a jack, completing the installation process of the beam-column node;

[0050] When an earthquake occurs, since the height of the upper energy-absorbing rod 61 in the upper and lower groups of energy-absorbing rods 61 is higher than the height of the highest steel strand 4, and the height of the lower energy-absorbing rod 61 is lower than the height of the lowest steel strand 4, when a relative displacement occurs between the precast beam 1 and the precast column 2 during an earthquake, the energy-absorbing rod 61 will be subjected to shear force before the steel strand 4. When the steel strand 4 is subjected to the tensioning force generated by the earthquake energy, the tensioning plate 52 will tend to move toward the conductive rod 73. At this time, the horizontal The pushing block 71 will squeeze the pushing inclined surface 621 of the pushing slider 62 through the transverse inclined surface 711, and the pushing slider 62 will move vertically to make the tension rod 63 rotate around the fulcrum on the fulcrum seat 72. At this time, the transmission pull rod 73 will generate a bending tension on the energy dissipation rod 61, so that the energy dissipation rod 61 is bent, helping the energy dissipation rod 61 to smoothly enter the yield state. The bending deformation of the energy dissipation rod 61 will generate a thrust on the tensioning plate 52 through the tension rod 63, and the thrust direction is the relaxation direction of the steel strand 4, preventing the steel strand 4 from being broken before the energy dissipation rod 61.

[0051] In the process of the transverse push block 71 moving toward the conductive pull rod 73, the fulcrum seat 72 will be driven to move in the tensioning direction (i.e., move toward the conductive pull rod 73). At this time, the distance between the fulcrum seat 72 and the conductive pull rod 73 gradually decreases, while the distance between the fulcrum seat 72 and the transverse push block 71 gradually increases. At this time, a large tensioning arm of the steel strand 4 will be formed, while a small bending arm of the energy dissipation rod 61 will be formed, so that the steel strand 4 can generate a larger bending tension on the energy dissipation rod 61 when subjected to a smaller excess tension (exceeding the tension of the initial pre-tensioning tension), so that the energy dissipation rod 61 quickly enters a yield state and consumes seismic energy; in the process of the movement of the tensioning plate 52, due to the angle setting of the self-locking inclined surface 522 and the sliding inclined surface 5111, the resistance of the tensioning plate 52 to the tensioning direction will gradually increase when an earthquake occurs, thereby slowing down the movement speed of the tensioning plate 52, and then gradually reducing the increase rate of the tension amplification ratio, to achieve smooth energy dissipation.

[0052] The basic principles, main features, and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A prestressed assembled beam-column joint intelligent tensioning device; comprising a prefabricated beam (1), a prefabricated column (2), a prestressing channel (3) and a steel strand (4), characterized in that: The invention also includes a tensioning anchor (5), an energy-absorbing component (6) and a conduction component (7); the tensioning anchor (5) is connected to the steel strand (4); when an earthquake occurs, the steel strand (4) is subjected to tensioning force, which drives the tensioning anchor (5) to slide in the tensioning direction; the energy-absorbing component (6) passes through the tensioning anchor (5) to connect the prefabricated beam (1) and the prefabricated column (2); the conduction component (7) is connected between the tensioning anchor (5) and the energy-absorbing component (6); the tensioning anchor (5) slides to change the rotation center of the conduction component (7) and drives the conduction component (7) to rotate; the conduction component (7) rotates to apply tension to the energy-absorbing component (6) and applies a thrust opposite to the direction of its movement to the tensioning anchor (5).

2. The prestressed assembled beam-column joint intelligent tensioning device according to claim 1, characterized in that: The tensioning anchor (5) comprises an anchor plate (51), a tensioning plate (52), a tensioning clip (53) and a tensioning disc spring (54); the anchor plate (51) is connected to the prefabricated column (2), and a sliding track (511) is provided on the anchor plate (51); the tensioning plate (52) is slidably installed in the sliding track (511), and a tensioning hole (521) for the steel strand (4) to pass through is provided on the tensioning plate (52); the tensioning clip (53) is sleeved on the outside of the steel strand (4) and is installed in the tensioning hole (521) through a threaded connection; the tensioning disc spring (54) is connected between the tensioning plate (52) and the anchor plate (51).

3. The intelligent tensioning device for prestressed assembled beam-column joints according to claim 2, characterized in that: The sliding track (511) is provided with a sliding inclined surface (5111); the upper and lower ends of the tensioning plate (52) are provided with self-locking inclined surfaces (522); and the angle between the sliding inclined surface (5111) and the horizontal plane is greater than the angle between the self-locking inclined surface (522) and the horizontal plane.

4. The intelligent tensioning device for prestressed assembled beam-column joints according to claim 2, characterized in that: The energy-absorbing component (6) includes an energy-absorbing rod (61), a lifting slider (62), a tension rod (63) and a self-locking spring (64); an energy-absorbing hole (512) is provided on the anchor plate (51), and lifting grooves (513) are symmetrically provided on both sides of the anchor plate (51); the energy-absorbing rod (61) is installed in the energy-absorbing hole (512); the lifting slider (62) is slidably installed in the lifting groove (513); the tension rod (63) is connected to the lifting slider (62); and the self-locking spring (64) is connected between the lifting slider (62) and the lifting groove (513).

5. The prestressed assembled beam-column joint intelligent tensioning device according to claim 4, characterized in that: The energy-consuming holes (512) are provided in two groups, symmetrically arranged at the upper and lower parts of the anchoring plate (51), and the upper energy-consuming holes (512) are located at a height higher than the tensioning holes (521) at the highest position, while the lower energy-consuming holes (512) are located at a height lower than the tensioning holes (521) at the lowest position.

6. The intelligent tensioning device for prestressed assembled beam-column joints according to claim 4, characterized in that: The conduction assembly (7) includes a transverse push block (71), a fulcrum seat (72) and a conduction pull rod (73); the transverse push block (71) is arranged on both sides of the tensioning plate (52); a sliding support groove (631) is provided on the tension rod (63); one end of the fulcrum seat (72) is connected to the transverse push block (71), and the other end is installed in the sliding support groove (631); one end of the conduction pull rod (73) is connected to the tension rod (63), and the other end is connected to the energy dissipation rod (61).

7. The intelligent tensioning device for prestressed assembled beam-column joints according to claim 6, characterized in that: The lifting slide block (62) is provided with a lifting inclined surface (621); the transverse sliding push block (71) is symmetrically provided with transverse sliding inclined surfaces (711) on the upper and lower sides; and the angle between the lifting inclined surface (621) and the horizontal plane is greater than 45 degrees.

8. The intelligent tensioning device for prestressed assembled beam-column joints according to claim 6, characterized in that: The rigidity of the conductive pull rod (73) and the tension rod (63) is greater than the rigidity of the energy dissipation rod (61).

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