【摘要】 为了研究多维地震作用下隔震梁桥结构振动特性和隔震效果,隔震支座两水平正交方向力-变形关系以及竖向性能等,对方形铅芯支座隔震连续梁桥结构模型进行了下模拟地震振动台试验。在水平单向、双向及水平双向和竖向同地输入地震波时,对桥梁模型结构桥面和桥墩顶部加速度反应,位移反应,以及隔震支座两水平正交方向力-变形关系和竖向力反应等进行了相关研究,得出若干对桥梁隔震设计有价值的结论。更多还原

【Abstract】 In order to investigate isolator properties, vibration properties and isolated effect of continuous girder isolated bridges with lead rubber bearings (LRB) under multi-directional excitation, the simulated earthquake tests of a seismically isolated bridge model consisting of multi-span continuous deck are carried out on a shaking table under multi-directional earthquake input. The acceleration and displacement response trend of the deck and the pier-cap of the isolated bridge, and vertical force and horizontal force-deformation restoring force relationship of LRB are studied under unidirectional, bi-directional, and multi-directional earthquake input. Some reasonable and valuable conclusions are obtained for design of continuous girder isolated bridges.更多还原