摘要
对悬索桥鞍座顶推中预偏量计算控制原则、塔顶位移与塔底应力的关系、顶推量和顶推时间的确定等几个问题进行了探讨,阐明了鞍座平衡条件的合理模式及预偏量的计算方法。结合坝陵河大桥鞍座的顶推计算分析,得出超量顶推可增加顶推时间间隔,减少顶推次数,顶推后的工况是主缆抗滑移验算的不利工况等结论。
Some problems existing in saddle pushing,such as the pre-displacement control principle,the relation of tower top displacement and tower bottom stress,the method of determining saddle pushing stages and pushing values,are discussed.The reasonable model of saddle equilibrium condition and the pre-displacement calculation method are expounded.Combining with saddle pushing analysis of Baling River Bridge,the conclusion that the excess pushing scheme can increase the interval of each pushing and reduce pushing times is obtained.The cases following saddle pushing are the unfavorable conditions for main cables anti-sliding checking.
出处
《中国工程科学》
2010年第7期68-73,共6页
Strategic Study of CAE
基金
国家科技支撑计划项目资助(2008BAG07B05)
关键词
悬索桥
鞍座顶推
鞍座平衡条件
塔顶偏位
塔底应力
suspension bridge
saddle pushing
saddle equilibrium condition
tower top displacement
tower bottom stress
