摘要
因浮桥接头动力响应的复杂性,至今仍未找到一种通用的方法模拟接头的动力特性,使得对浮桥进行建模并求解其的动态响应时存在较大困难。利用杆单元模拟接头的抗拉和抗压特性,并利用梁单元的抗弯特性,把两者结合组成非线性混合单元,可以较好地模拟接头的特性和求解浮桥的动态响应。对数值计算和已有的模型试验结果的分析发现,在快速通载时非线性连接浮桥会发生位移波堆积效应。
There is no universal method to simulate the dynamic characteristics of gaps for floating bridges due to the complexities of their dynamic responses.Thusly it is very difficult to model and compute the dynamic responses of a floating bridge.The nonlinear mixed element can be creating a combined truss element,which can simulate the connector character of tension and compression,and a girder element,which can simulate its bending character.Consequently,the nonlinear mixed element can be used to model the connector character and calculate the dynamic responses of a floating bridge.It shows that the floating bridge with nonlinear connector will present the effect of displacement wave accumulation subjected to fast and heavy loads after analyzing both numerical results and the corresponding model experiment.
出处
《工程力学》
EI
CSCD
北大核心
2012年第10期335-339,共5页
Engineering Mechanics
基金
国家自然科学基金项目(51009147)
关键词
浮桥
非线性间隙单元
移动荷载
动态响应
位移波堆积
floating bridge
nonlinear gap element
moving loading
dynamic response
displacement wave accumulation
