液体黏滞阻尼器与双曲面球形减隔震支座联合应用研究

发布时间：2018-10-21 14:36

【摘要】：以某城际铁路105 m简支系杆拱桥为工程依托,采用液体黏滞阻尼器与双曲面球形减隔震支座联合作用方式,对结构进行罕遇地震下的抗震设计,以了解二者联合应用于减隔震设计时的特性。利用Midas/Civil软件,采用非线性时程分析方法,对液体黏滞阻尼器与双曲面球形减隔震支座分别应用于结构的减震效果,以及二者联合应用时的减震特性分别进行了分析。分析结果显示,液体黏滞阻尼器的减震效果要优于双曲面球形减隔震支座。在给定的减震目标下二者联合应用时,液体黏滞阻尼器的吨位及结构墩顶水平力均较单独使用有所降低,对阻尼器的布置及结构的抗震设计是有利的;双曲面球形减隔震支座对地震能量耗散小,支座的摩阻系数提高时虽然增大了地震能量消耗比,但增大了结构墩顶水平力与震后残余位移,对结构抗震是不利的;二者联合应用时,应结合设防结构自身特点与减隔震设计目标,选取合适的设计参数。
[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.
【作者单位】：中铁第一勘察设计院集团有限公司桥隧处;
【分类号】：U443.36

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