摘要
在大跨度斜拉桥的悬臂施工过程中 ,主梁节段自重的准确识别是保证斜拉桥结构成功修建的基础工作。本文研究从实际施工的角度出发 ,引入施工相关性的考虑 ,结合系统重构 ,建立了一套具一般意义的针对主梁节段自重参数识别问题的递进识别算法。崖门大桥的实桥计算表明 ,通过考虑实际施工中的相关信息 ,该算法不仅能对主梁节段自重进行有效的识别 ,还具有良好的预测功能 。
During the cantilever construction process of a long-span cable-stayed bridge, it is essential to accurately identify the self-weights of segmental girders for understanding and control of the structural behavior. In this paper, from the point of view of practical construction, the concept of construction correlation is introduced,in combination with system rebuilding,and a general sequential estimation formula is established for identifying the self-weights of segmental girders.The proposed formula is applied to the construction of Yamen Bridge, and the numerical results illustrate that, in consideration of construction correlation, the proposed formula can accurately identify the pre-construction self-weights and effectively predict the post-construction self weights.
出处
《土木工程学报》
EI
CSCD
北大核心
2005年第2期68-74,80,共8页
China Civil Engineering Journal
基金
广东省自然科学基金资助项目 (0 0 0 387)
关键词
斜拉桥
施工控制
参数识别
随机场
cable-stayed bridge
construction control
parameter estimation
random field
