【摘要】 某黄河独塔斜拉桥初步设计方案有半漂浮结构体系和固定铰支承结构体系。对其两种不同结构体系进行了抗震性能分析,通过对两种不同结构体系地震荷载作用下主塔控制截面内力响应对比可知,该桥为典型低重心独塔斜拉桥,该桥固定铰支承结构体系主塔控制截面的弯矩响应明显低于半漂浮结构体系主塔相应截面的弯矩响应。为进一步提高该桥的抗震性能,分别对不同塔梁之间纵向特殊连接装置对抗震性能的影响进行了优化对比分析,得到了一些有意义的结论。更多还原

【Abstract】 Two conceptual designs are prepared for a one tower cable-stayed bridge over Huanghe river,the fixed hinge structural system and the half-floating system.Earthquake resistances of the two kinds of conceptual design structural systems are studied.Through contrasting the response of control cross-section of two different kinds of structural system under earthquake load,it is indicated that this bridge is a typical low gravity center cable-stayed bridge.The moment response of main tower control cross-section of the fixed hinge structural system is considerably lower than that of half-floating system under earthquake load.In order to improve earthquake resistance of the bridge,optimizing and contrasting of the earthquake resistance influence of special link device between tower and girder is conducted.Several significant conclusions are obtained.更多还原