摘要
针对大跨悬索桥中不对称加载挠度大和最大活载挠度不在跨中的现象,比较了中央扣引起的活载挠度包络图的差异。分别选取中央扣两边的主缆为研究对象,根据相容方程,利用柔索计算的虚拟梁法求解了具有中央扣的大跨悬索桥的活载挠度,分析了中央扣对活载挠度的影响,找到了活载挠度"W"形包络图和"V"形包络图差异的原因。
In the light of the phenomenon that the asymmetric loading deflection of long span suspension bridge is great and the maximum live load does not take place at the midspan of the bridge, the differences of envelope diagrams of the live load deflection due to installation of central cable band are compared. The cable at each side of a central cable band is respectively taken as the research object, and in accordance with the compatibility equations and by means of the virtu- al beam method calculated by the flexible cable, the live load deflection of long span suspension bridge with central cable band is solved, the influence of the central cable band on the live load deflection is analyzed and the causes of the differences between the W-like profile and V-like profile of the live load deflection are found out.
出处
《世界桥梁》
北大核心
2009年第2期51-53,64,共4页
World Bridges
关键词
悬索桥
中央扣
活载挠度
包络图
suspension bridge
central cable band
live load deflection
envelope diagram
