CN-121976706-A - Self-resetting rigidity-changing damping-changing viscoelastic connecting beam

CN121976706ACN 121976706 ACN121976706 ACN 121976706ACN-121976706-A

Abstract

The invention relates to a self-resetting rigidity-changing damping-changing viscoelastic connecting beam which comprises a first driving mechanism, a second driving mechanism and two self-resetting mechanisms, wherein the first driving mechanism comprises two first material plates which are vertically arranged in parallel, one side of each first material plate is configured to be connected with a first wall, the second driving mechanism comprises two second material plates which are vertically arranged in parallel, a first movable plate which is arranged between the two second material plates, two pressing strips which are respectively arranged above and below the first movable plate, and a guide rod which passes through the pressing strips upwards or downwards, viscoelastic energy dissipation layers are respectively arranged between the first movable plate and the two first material plates and between the two first material plates and the corresponding second material plates, and the two self-resetting mechanisms are configured to drive the second material plates and the first material plates to reset after moving. Compared with the prior art, the invention realizes the change of rigidity while realizing different damping energy consumption, and meets different requirements of different levels of vibration/vibration on the energy consumption connecting beam.

Inventors

ZHU RUIZHAO
GUO TONG
HU SHULING
XIA YU
SHI XIN
CHENG SHIYAN

Assignees

东南大学

Dates

Publication Date: 20260505
Application Date: 20260122

Claims (10)

1. A self-resetting variable stiffness variable damping viscoelastic tie beam, comprising: the first driving mechanism comprises two first material plates which are vertically arranged in parallel, and one side of each first material plate is configured to be connected with a first wall limb; The second driving mechanism comprises two second material plates vertically arranged in parallel, a first movable plate arranged between the two second material plates, two pressing strips respectively arranged above and below the first movable plate, and a guide rod arranged on the first movable plate and penetrating through the pressing strips upwards or downwards, wherein the second material plates and the pressing strips are both configured to be connected with second wall limbs, the first movable plate and the second wall limbs are in sliding connection along the vertical direction, the first movable plate stretches into the space between the two first material plates, the guide rod is in sliding connection with the pressing strips, a first cylindrical spring is sleeved on the guide rod, the two second material plates are respectively arranged on the outer sides of the two first material plates, and a viscoelastic energy dissipation layer is respectively arranged between the first movable plate and the two first material plates and between the two first material plates and the corresponding second material plates; The at least two self-resetting mechanisms are symmetrically arranged on the two second material plates and are configured to drive the second material plates and the first material plates to reset after moving.
2. The self-resetting rigidity-changing damping-changing viscoelastic connecting beam according to claim 1, wherein the upper end and the lower end of the first material plate are respectively provided with a pressing plate, the pressing plates are respectively connected with the first material plate and the first wall, each second material plate is positioned between the two pressing plates on the corresponding first material plate, the upper end and the lower end of one side of the second material plate, which is away from the first movable plate, are respectively provided with two upper pressing blocks and two lower pressing blocks, and each self-resetting mechanism is arranged on the upper pressing block and the lower pressing block and is arranged between the two pressing plates.
3. A self-resetting variable stiffness damping viscoelastic tie beam as defined in claim 2, wherein said self-resetting mechanism comprises: The second movable plate, the third movable plate and the fourth movable plate are horizontally arranged in sequence from top to bottom and are arranged between the upper pressing block and the lower pressing block; the main rod is vertically arranged between the two pressing plates, passes through the second movable plate, the third movable plate and the fourth movable plate and is in sliding connection with the second movable plate, the third movable plate and the fourth movable plate, and is further provided with a third adjusting nut capable of propping against the limiting second movable plate from top and a fourth adjusting nut capable of propping against the limiting fourth movable plate from bottom; The first annular spring is sleeved on the main rod and penetrates through the third movable plate so that two ends respectively prop against the second movable plate and the fourth movable plate; The second annular spring is sleeved on the first annular spring, and two ends of the second annular spring respectively prop against the third movable plate and the fourth movable plate; The second cylindrical spring is sleeved on the first annular spring and is positioned between the second movable plate and the third movable plate; the first adjusting screws are arranged along the vertical direction, and the two ends of the first adjusting screws respectively penetrate through the third movable plate and the fourth movable plate and are then in threaded connection with first adjusting nuts; and a plurality of second adjusting screws which are arranged along the vertical direction, the upper ends of the second adjusting screws penetrate through the second movable plates and are connected with the second movable plates in a sliding manner, and the lower ends of the second adjusting screws penetrate through the third movable plates and are fixedly connected with the third movable plates.
4. A self-resetting variable stiffness variable damping viscoelastic tie beam as claimed in claim 3 wherein two ends of said main rod pass through between two upper press blocks and between two lower press blocks respectively; The upper pressing block is further vertically provided with at least one adjusting bolt, the adjusting bolt penetrates through the upper pressing block, and the downward extending length of the adjusting bolt is adjustable, so that when the self-resetting mechanism is placed between the upper pressing block and the lower pressing block in a normal state, the bottom end of the adjusting bolt is in contact with the second movable plate.
5. A self-resetting variable stiffness damping viscoelastic tie beam as defined in claim 3 wherein the length of said second cylindrical spring in a normal condition is less than the spacing between said second movable plate and said third movable plate.
6. A self-resetting variable stiffness damping viscoelastic tie beam as defined in claim 3 wherein said second cylindrical spring has a stiffness less than the second annular spring.
7. The self-resetting variable-rigidity variable-damping viscoelastic connecting beam according to claim 3, wherein the second adjusting screw is further provided with a second adjusting nut with an adjustable position.
8. A self-resetting variable stiffness damping viscoelastic tie beam as defined in claim 3 wherein said first annular spring passes through said third movable plate and is free to slide.
9. A self-resetting variable stiffness damping viscoelastic tie beam as defined in claim 3 wherein the mounting location of said first adjusting nut on said first adjusting screw is adjustable.
10. The self-resetting variable stiffness damping viscoelastic tie beam of claim 1, wherein the length of the first cylindrical spring is less than the distance between the first movable plate and the corresponding bead.

Description

Self-resetting rigidity-changing damping-changing viscoelastic connecting beam Technical Field The invention belongs to the technical field of building structures, and relates to a self-resetting rigidity-changing damping-changing viscoelastic connecting beam. Background The energy-consumption connecting beam is a key component for connecting a shear wall or a frame column in a building structure, and has the core function of absorbing and dissipating earthquake energy through self-controllable deformation under the action of horizontal loads such as earthquakes and the like. Different from the common connecting beam, the connecting beam is usually specially designed or made of materials, or through structural optimization, such as setting a damper and the like, the component is made to enter an inelastic state before the main structure under the action of an earthquake, and the stress and deformation of the main structure are reduced through hysteresis energy consumption. The design goal is to ensure that the main structure basically keeps elasticity in the earthquake, and meanwhile, the earthquake response of the structure is reduced through self energy consumption, so that the earthquake-resistant safety and damage controllability of the building structure are improved. At present, dampers and the like adopted by traditional energy-consuming connecting beams are usually of fixed damping designs, energy dissipation is mainly carried out aiming at strong vibration working conditions, larger deformation or shearing force level is required for starting, under wind load or small vibration action, the dampers cannot be activated, the connecting beams still mainly take an elastic working state and cannot effectively exert the energy-consuming effect, so that the building structure is easy to generate excessive vibration response under the daily power action, the comfort level of the building is influenced, cracking or damage of non-structural members is possibly caused, the energy-consuming requirement under the small vibration is difficult to consider, and the continuous optimizing capability of the structural performance is limited. The self-resetting viscoelastic energy-consuming beam connecting device provided by CN118498549A consists of a left Lian Liangzhi, a right Liang Zhi, a left shearing plate, a right shearing plate, a viscoelastic material layer, a self-resetting mechanism and an overload protection mechanism, wherein the self-resetting mechanism is formed by combining an annular spring and the viscoelastic material layer, the restoring force is provided by adjusting the pre-pressure of the annular spring, and the overload protection mechanism is arranged in the structure to prevent overload damage. The damping capacity and the resetting capacity of the self-resetting viscoelastic energy-consuming connecting beam device are usually of fixed design, energy dissipation and self-resetting are mainly carried out aiming at strong vibration working conditions, larger deformation or shearing force level is needed for starting, the connecting beam devices cannot be activated under wind load or small vibration action, the connecting beam is still mainly in an elastic working state, the energy consumption effect cannot be effectively exerted, the building structure is easy to generate overlarge vibration response under the daily power action, the using comfort of the building is influenced, cracking or damage of non-structural members is possibly caused, the energy consumption and the resetting requirements under the small vibration are difficult to consider, and the continuous optimizing capacity of the structural performance is limited in the whole life cycle. Disclosure of Invention The invention aims to provide a self-resetting rigidity-changing damping-changing viscoelastic connecting beam which can adapt to corresponding damping energy consumption under different levels of vibration and can meet the rigidity requirement under small vibration and the ductility energy consumption requirement under large vibration. The aim of the invention can be achieved by the following technical scheme: a self-resetting variable stiffness variable damping viscoelastic tie-beam comprising: the first driving mechanism comprises two first material plates which are vertically arranged in parallel, and one side of each first material plate is configured to be connected with a first wall limb; The second driving mechanism comprises two second material plates vertically arranged in parallel, a first movable plate arranged between the two second material plates, two pressing strips respectively arranged above and below the first movable plate, and a guide rod arranged on the first movable plate and penetrating through the pressing strips upwards or downwards, wherein the second material plates and the pressing strips are both configured to be connected with second wall limbs, the first movable plate and the second wall limbs ar