摩擦摆支座隔震非线性时程分析研究

Analysis and Study on Nonlinear Time History of Vibrational Isolation for Friction Pendulum Bearing

通过对某黄河大桥摩擦摆隔震支座这一新型结构型式在地震作用下的非线性时程分析研究,对比固定结构和摩擦摆结构在地震作用下的反应,通过地震反应分析及抗震验算,认为摩擦摆隔震系统能有效地降低结构的各种反应,较好地克服其他支座固定方向水平抗剪承载力不足的缺陷,具有明显的减震效果。与非隔震方案相比,摩擦摆隔震支座具有更高的安全储备。

According to the analysis and study on the nonlinear time history of this new structure of friction pendulum vibrational isolation bearing for a bridge in Huanghe River,the article compares the reactions of the fixed structure and friction pendulum,structure under the earthquake action.Through the earthquake reaction analysis and the seismic checking,the result shows that the friction pendulum vibrational isolation system can effectively reduce various reactions of structure,better overcome the defects of insufficient fixed directional horizontal shear bearing capacity of the other bearings,and has the obvious shock absorption effect.Compared with the non-vibrational isolation scheme,the friction pendulum vibration isolation bearing has the higher safety reserves.