液體黏滯阻尼器與雙曲面球形減隔震支座聯(lián)合應用研究
[Abstract]:Based on a 105m simply supported tied arch bridge of an inter-city railway, the aseismic design of the structure under rare earthquake is carried out by the combined action of liquid viscous damper and hyperboloid spherical isolation support. In order to understand the characteristics of the combined application of the two in seismic isolation design. By using the Midas/Civil software and the nonlinear time-history analysis method, the effects of the liquid viscous damper and the hyperboloid spherical shock isolation support applied to the structure are analyzed respectively, and the vibration absorption characteristics of the two systems are analyzed respectively. The results show that the damping effect of liquid viscous damper is better than that of hyperboloid spherical isolator. The tonnage of the liquid viscous damper and the horizontal force at the top of the structure pier are lower than those of the single application under the given shock absorption target, which is beneficial to the layout of the damper and the seismic design of the structure. The energy dissipation of hyperboloid spherical isolation bearing is small, and the friction coefficient of the bearing increases the energy consumption ratio of earthquake, but it increases the horizontal force and residual displacement at the top of the structure pier, which is disadvantageous to the seismic resistance of the structure. When they are used together, the appropriate design parameters should be selected in combination with the characteristics of the fortified structure and the design objective of the seismic isolation.
【作者單位】: 中鐵第一勘察設計院集團有限公司橋隧處;
【分類號】:U443.36
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