• 论文 •

### 移动荷载作用下考虑纵向连接间隙的浮桥结构计算

1. （陆军工程大学 野战工程学院， 江苏 南京 210007）
• 收稿日期:2019-10-14 修回日期:2019-10-14 上线日期:2020-09-23
• 通讯作者: 陈徐均（1972—），男，教授，博士生导师 E-mail:chenxujun213@sina.com
• 作者简介:黄恒（1995—），男，博士研究生。E-mail: huangheng19@sina.com
• 基金资助:
国家自然科学基金项目（51679250）；工业信息化部高性能船舶科研项目（2016年）；工业信息化部高性能船舶科研项目(2019年）

### Calculation of Floating Bridge with Longitudinal Connection Gaps under Moving Load

HUANG Heng, CHEN Xujun, SHI Jie, WEI Xiao

1. (School of Field Engineering, Army Engineering University, Nanjing 210007, Jiangsu, China)
• Received:2019-10-14 Revised:2019-10-14 Online:2020-09-23

Abstract: A mathematical model for calculating the vertical displacement and bending moment of a long floating bridge under moving load is established based on the elastic foundation beam theory. On this basis, according to the displacement reciprocity theorem and the influence line theory, the calculation method of floating bridge with the longitudinal connection gaps under moving load is deduced and proved by introducing the concepts of gap angle and angle influence line. The method can be used to calculate the displacement and force of floating bridges with longitudinal connection gaps under moving load. The results indicate that the increase in connection gaps leads to the increase in draft of floating bridge. At the same time, the bending moment of bridge span and the force at the connection decrease. With the increase in load moving speed, the maximum draft and the connection force will increase. The influences of longitudinal connection gaps and load velocity on the deformation and force of floating bridge structure can not be ignored. The reasonable connection gaps are very important to optimize the structure of floating bridge. In the process of passing floating bridge, the vehicles must pass at a limited speed and load to ensure the safety. The calculated results have good consistency compared with the numerically calculated and model test results in Ref.［16］.