摘要
以广东省江肇高速公路西江特大桥(五跨矮塔斜拉桥)为背景,采用BDCMS有限元软件建立平面梁单元模型;以塔顶偏位及墩顶应力为控制目标,确定了次中跨、中跨的合拢顶推力;又以合拢口两端挠度为控制目标,推导了不平衡配重;进而分析比较不同顶推力作用下成桥后结构受力状态和位移,由此获得最优的合拢方案.
Xijiang Large Bridge on the highway of Jiangmen to Zhaoqing in Guangdong province is taken as an example,and the analytical model with plane beam elements is established by using the FEM software BDCMS.By taking the tower top displacement and tower bottom stress as the controlling aim,the optimized closure jacking forces on the side-middle and middle spans are determined.Meanwhile,the unbalanced weight is derived according to the vertical displacements at two closure ends.Finally,the stress and displacement states of the bridge under the different jacking forces are discussed and compared,in which the optimized closure construction plan is obtained.
出处
《长沙理工大学学报（自然科学版）》
CAS
2011年第4期42-48,共7页
Journal of Changsha University of Science and Technology:Natural Science
基金
湖南省科技厅科技计划资助项目(2011FJ3235)
关键词
多跨矮塔斜拉桥
合拢工艺
受力状态
位移
cable-stayed bridge with multi-span and low towers
closure construction
stress state
displacement
