【摘要】 采用编制的二维有限元程序 ,对采用铅芯橡胶支座作为减隔震装置的桥梁结构进行了非线性动力分析 ,研究了不同场地的地震激励、地震烈度、桥梁墩高和截面尺寸、支座参数等因素对桥梁结构抗震性能的影响 ,并与板式橡胶支座进行了比较。分析结果表明 ,铅芯橡胶支座可以有效地降低结构的位移和内力响应 ,改善结构的抗震性能。更多还原

【Abstract】 In this paper,the nonlinear dynamic responses of railway bridge equipped with seismic reduction and isolation bearing are analyzed by 2D finite element program.During the analysis,different parameters such as seismic site,intensity,link stiffness of LRB and bridges structure themselves are considered respectively,and the responses of bridge with different bearings are compared with the objective of determining the effect of different factors above on the anti seismic performance of bridge.The results show that the use of isolation bearing improves the anti seismic performance of bridge,and decreases the displacement and internal forces of pier substantially.更多还原