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CN-122014042-A - Assembled grouting-free bar energy dissipater and assembling method thereof

CN122014042ACN 122014042 ACN122014042 ACN 122014042ACN-122014042-A

Abstract

The invention relates to an assembled grouting-free bar energy dissipater and an assembling method thereof, wherein the assembled grouting-free bar energy dissipater comprises an energy dissipating bar, a connecting sleeve, end plates and a constraint sleeve, the connecting sleeve is provided with a pair of connecting sleeves, the energy dissipating bar extends into the connecting sleeves at the two ends respectively and is in threaded connection with the connecting sleeves at the two ends, the two ends of the energy dissipating bar are variable cross sections, the constraint sleeve is sleeved outside the energy dissipating bar and the connecting sleeves at the two ends, the two ends of the constraint sleeve are variable cross sections, one end of the constraint sleeve is in threaded connection with the connecting sleeve at one end, the other end of the constraint sleeve is in threaded connection with the connecting sleeve at the other end, a stroke space is reserved between the variable cross section of the other end and the connecting sleeve at the other end in the axial direction parallel to the energy dissipating bar, a strip-shaped groove is formed at the other end of the constraint sleeve, a fastening bolt penetrates through the connecting sleeve at the other end and the other end of the strip-shaped groove, and the connecting sleeves at the two ends are respectively connected with the end plates. Compared with the prior art, the invention has the advantages of simple structure, easy processing and assembly, repeated utilization and quick replacement to realize the recoverable function.

Inventors

  • LI PEIZHEN
  • JIA KAI
  • Lv xilin
  • BU FANFU

Assignees

  • 同济大学

Dates

Publication Date
20260512
Application Date
20260401

Claims (10)

  1. 1. The utility model provides an assembled exempt from to grout rod energy dissipation ware, its characterized in that, this energy dissipation ware includes energy dissipation rod (1), connecting sleeve, end plate (5) and restraining sleeve (6), the connecting sleeve is provided with a pair of, energy dissipation rod (1) stretch into the connecting sleeve at both ends respectively, respectively with the connecting sleeve threaded connection at both ends, the both ends variable cross section at energy dissipation rod (1), outside the connecting sleeve at energy dissipation rod (1) and both ends is located to restraining sleeve (6) cover, the both ends variable cross section at restraining sleeve (6), the connecting sleeve threaded connection of one end, the other end and the connecting sleeve bolted connection of the other end, the other end variable cross section department leaves the stroke space in being on a parallel with the axial of energy dissipation rod (1) between the connecting sleeve of the other end, and bar (9) have been seted up to the other end, and fastening bolt (8) pass bar groove (9) and connect the connecting sleeve at the other end and the other end of restraining sleeve (6), and the connecting sleeve at both ends is connected with a pair of end plate (5) respectively.
  2. 2. The assembled grouting-free bar energy dissipater according to claim 1, wherein the pair of connecting sleeves comprises a lower connecting sleeve (2) and an upper connecting sleeve (3), the energy dissipating bar (1) stretches into the lower connecting sleeve (2) and the upper connecting sleeve (3) respectively, the energy dissipating bar is in threaded connection with the lower connecting sleeve (2) and the upper connecting sleeve (3) respectively, the restraining sleeve (6) is sleeved outside the energy dissipating bar (1), the lower connecting sleeve (2) and the upper connecting sleeve (3), the lower end of the restraining sleeve (6) is in threaded connection with the lower connecting sleeve (2), the upper end of the restraining sleeve (6) is in threaded connection with the upper connecting sleeve (3), a stroke space is reserved between the variable cross section of the upper end and the upper connecting sleeve (3) in the axial direction parallel to the energy dissipating bar (1), a strip-shaped groove (9) is formed in the upper end, the fastening bolt (8) is connected with the upper end of the restraining sleeve (6) and the upper connecting sleeve (3) through the strip-shaped groove (9), and the lower connecting sleeve (2) and the upper connecting sleeve (3) are connected with the pair of end plates (5) respectively.
  3. 3. The assembled grouting-free bar energy dissipater according to claim 2, wherein the diameter of an inner cylinder at the upper end of the constraint sleeve (6) is matched with that of an outer cylinder of the upper connecting sleeve (3), a bar-shaped groove (9) is formed in the far-end wall surface at the upper end of the constraint sleeve (6) in the axial direction parallel to the energy dissipation bar (1), a threaded hole (11) is formed in the upper connecting sleeve (3) in the radial direction parallel to the energy dissipation bar (1), and the fastening bolt (8) penetrates through the bar-shaped groove (9), is screwed into the threaded hole (11) and is fastened in a matched mode with a nut.
  4. 4. A fabricated grouting-free bar energy dissipater as claimed in claim 3, characterized in that the length of the bar-shaped groove (9) is the sum of the diameter of the threaded hole (11) and the maximum tensile deformation and maximum compressive deformation of the energy dissipater.
  5. 5. The assembled grouting-free bar energy dissipater according to claim 2, wherein the diameter of an inner cylinder at the lower end of the constraint sleeve (6) is matched with that of an outer cylinder of the lower connecting sleeve (2), a second internal thread is tapped on the inner wall surface at the most distal end of the lower end of the constraint sleeve (6), a second external thread (10) is tapped on the outer wall surface of the lower connecting sleeve (2), and the lower end of the constraint sleeve (6) is in threaded connection with the lower connecting sleeve (2) through the cooperation of the second internal thread and the second external thread (10).
  6. 6. The assembled grouting-free bar energy dissipater as claimed in claim 2, wherein the lower end variable cross section of the constraint sleeve (6) is tightly attached to the lower connecting sleeve (2) in the axial direction parallel to the energy dissipater bar (1).
  7. 7. The assembled grouting-free bar energy dissipater as claimed in claim 2, wherein the two ends of the energy dissipater bar (1) are provided with elastic sections, the middle of the energy dissipater bar is weakened into energy dissipation yield sections, and an arc transition section is arranged between the elastic sections and the energy dissipation yield sections; the elastic sections at two ends of the energy dissipation bar (1) are matched with the diameters of the inner cylinders of the lower connecting sleeve (2) and the upper connecting sleeve (3), first external threads (4) are formed in the outer wall surfaces of the farthest ends of the elastic sections at two ends of the energy dissipation bar (1), first internal threads are formed in the inner wall surfaces of the lower connecting sleeve (2) and the upper connecting sleeve (3), and the energy dissipation bar (1) is in threaded connection with the lower connecting sleeve (2) and the upper connecting sleeve (3) through the first external threads (4) and the first internal threads.
  8. 8. The assembled grouting-free bar energy dissipater of claim 7, wherein the elastic section of the upper end of the energy dissipater bar (1) with the first external thread (4) is sleeved with a limit nut (7).
  9. 9. The assembled grouting-free bar energy dissipater as claimed in claim 1, wherein the end plate (5) is provided with holes, and the energy dissipater is hinged with the structure through the holes.
  10. 10. A method of assembling a fabricated grouting-free bar energy dissipater as defined in any one of claims 1 to 9, comprising the steps of: S1, weakening the middle section of the energy dissipation bar (1), and tapping external threads at two ends; The center of the connecting sleeve at the other end is provided with an internal thread along the axial direction, and a pair of threaded holes are formed on two sides along the radial direction; A pair of end plates (5) with holes are respectively welded with the connecting sleeves at the two ends or are turned into a whole in advance; One end of the constraint sleeve (6) is provided with an internal thread, and the other end is provided with a pair of strip-shaped grooves (9) along the axial direction; s2, screwing an external thread section at one end of the energy dissipation bar (1) into an internal thread section of a connecting sleeve at one end; Screwing the internal thread section at one end of the constraint sleeve (6) into the external thread section of the connecting sleeve at one end; Screwing the limit nut (7) into an external thread section at the other end of the energy dissipation bar (1), screwing an internal thread section of a connecting sleeve at the other end into an external thread section at the other end of the energy dissipation bar (1), enabling one end to be just contacted with the limit nut (7), observing whether the end plates (5) at the two ends are in the same plane at the moment, and enabling the end plates (5) at the two ends to be coplanar by adjusting the screwing position of the limit nut (7) if the end plates are not in the same plane; The connecting sleeve is fixedly connected with the other end of the constraint sleeve (6) and the other end of the constraint sleeve through a pair of fastening bolts (8) penetrating through the strip-shaped groove (9) and being screwed into the threaded holes and being matched with the nuts.

Description

Assembled grouting-free bar energy dissipater and assembling method thereof Technical Field The invention belongs to the technical field of structural engineering earthquake and disaster prevention, and relates to an assembled grouting-free bar energy dissipater and an assembling method thereof. Background In recent years, the field of earthquake engineering is increasingly concerned about the functional restorability of structures under the action of strong earthquake, namely after the earthquake occurs, the engineering structures and even urban infrastructures can quickly restore the normal use functions of the structures, so that casualties, economic losses and social interruption are reduced to the greatest extent. The traditional anti-seismic design concept mainly focuses on the 'life safety' goal, and the new generation anti-seismic system further pursues 'low damage, easy repair and quick restoration'. Under the background, the structure systems of a swinging structure, a self-resetting structure, a replaceable component and the like are generated, the structure introduces a nonlinear swinging deformation mechanism at a foundation or a node, and an energy consumption element is additionally arranged at a swinging interface, so that the structure dissipates energy through rigid body rotation in an earthquake, thereby avoiding irreversible plastic deformation of a main body component and greatly reducing the repair difficulty and cost. The existing researches show that the structure can effectively reduce earthquake damage, but has certain defects, for example, the existing researches mainly adopt angle steel, U-shaped rings, O-shaped rings, special-shaped rings and other metal dampers at a swinging interface as energy consumption elements, but the metal dampers have complicated output mechanisms and are inconvenient to design, and have the problems that the energy consumption capability is limited, so that the structure is too large in response, the structure is complicated and difficult to land, and the like. Therefore, aiming at the unique mechanical behavior characteristics of the structure, an energy dissipation element which is matched with the mechanical behavior of the structure, has obvious energy dissipation effect, definite output mechanism and low cost and is easy to produce and assemble is required to be provided, so that the practical value of the energy dissipation element is improved. The patent CN114197681A discloses a grouting-free bar energy consumption device, which comprises an energy consumption bar, an inner reinforcing connecting section, an outer constraint sleeve and an outer connecting section, wherein the energy consumption bar comprises a middle energy consumption deformation section and extrusion connecting sections at two ends, the diameters of the energy consumption deformation section and the extrusion connecting sections are the same, the inner reinforcing connecting section comprises an extrusion section and an outer thread connecting section, an extrusion hole is formed in the extrusion section, the extrusion connecting section of the energy consumption bar is positioned in the extrusion hole, circumferential extrusion is carried out on the periphery of the extrusion section to enable the energy consumption bar to be connected with the inner reinforcing connecting section, the outer connecting section comprises a constraint section and a thread section, a constraint cylinder and an inner thread section are designed in the outer connecting section, the outer thread connecting section is connected in the inner thread section, the extrusion section is positioned in the constraint cylinder, the outer constraint sleeve is sleeved on the outer layer of the energy consumption bar, and two ends of the outer constraint sleeve are positioned in the constraint cylinder and have a certain deformation gap with the extrusion section. However, the circumferential extrusion force of the patent can be realized by a complex process in engineering, so that the manufacturing difficulty is increased, and the replacement of the energy-consuming bar after earthquake is not facilitated. Patent CN107447857a discloses a beam-end replaceable energy-consuming connecting component of an assembled concrete frame, the beam-end replaceable energy-consuming connecting component of the assembled concrete frame is arranged on the upper side and/or the lower side of the beam-end connected by a beam column of the assembled concrete frame structure, the connecting component comprises a core energy-consuming rod, a column-to-steel bar connecting sleeve arranged at one end of the core energy-consuming rod, a beam-to-adjustable combined steel bar joint arranged at the other end of the core energy-consuming rod and a constraint system paved outside the core energy-consuming rod far away from a beam bending neutral axis. However, the multi-nested sleeve and the special structural design thereof lead to poor i