Three-Dimensional Seismic Isolation Study of Single-Layer Reticulated Domes by Parameter Analysis

Research on seismic isolation performance of nuclear power plant containment structures

“…Although they can reduce the dynamic response of the structure to a certain extent, they ignore the synchronous isolation of horizontal and vertical directions. The development of three-dimensional bearings has broken through the limitations of unidirectional isolation [22].Nie et al found through a series of shaking table tests and mechanical performance studies that three-dimensional isolation bearings have significant isolation effects in both horizontal and vertical isolation, laying the foundation for the actual function of isolation bearings and structural seismic design [23][24].Zhu et al studied the mechanical performance of a separated three-dimensional isolation system through concept validation, and the results showed that the support effectively protected the structure from the influence of three-dimensional earthquakes and enhanced its load-bearing capacity [25].Li and Zhang et al studied the dynamic characteristics of three-dimensional bearings and found that they have good isolation and vibration reduction effects on three-dimensional isolation [26][27][28].Practice has shown that although horizontal isolation bearings can achieve good isolation effects, they cannot effectively reduce the vertical vibration frequency and vertical seismic response of the structure. However, three-dimensional isolation bearings have significant isolation effects in both horizontal and vertical isolation.This article studies the seismic performance and seismic vulnerability of a special structurethe safety shell structure of a nuclear power plant, based on the new type of isolation support "epoxy plate thick layer rubber isolation support".Research has shown that the support not only has good three-dimensional seismic isolation effect, but also has a low material density, making it easy to transport and install.From the perspective of construction and environmental protection, it has expanded a new direction for the field of seismic reduction and isolation in civil structures.…”

Dynamic Characteristics of Reticulated Domes Built of Composite Elastic/Viscoelastic Rods Modeled by the Fractional Zener Model

“…Moreover, in [18], a new method for the simulation of damping in single-layer domes is proposed. A few papers [19][20][21][22] describe new isolation devices and the dynamic performance of single-and double-layer domes with dampers. The optimization of dome structures with dynamic constraints is presented in [23,24], while, in [25], the dynamic analysis and seismic design method for reticulated domes with semi-rigid joints are discussed.…”

“…In [29], the effectiveness of two-directional and three-directional isolation systems is compared. Moreover, the numerical and experimental analysis of some isolation systems for reticulated domes is presented in [19,21,30]. The analysis of the effectiveness of a semiactive control system, applied in the reduction of the vibration of long-span reticulated steel structures, is presented in [31].…”