摘要
以1个实际的FRP夹心板公路桥为例,将其简化为等效正交各项异性实心板,采用有限元法对其进行模态分析,用模态坐标法进行车桥耦合计算。考虑路面情况、车辆行驶速度的变化对FRP夹心板桥动力响应及冲击系数的影响,并将计算结果与相同跨度的混凝土板桥的结果进行对比分析。此外,对美国规范AASHTO中冲击系数的规定对FRP桥面板桥的适用性进行讨论。
The present study focuses on a real FRP slab bridge, which is simplified as an equivalent orthotropic solid plate. Finite element method is used to predict the bridge＇ s modal characteristics; and the bridge and vehicle systems are integrated into a vehicle - bridge system based on deformation compatibility. The bridge dynamic response and impact factors are obtained considering different road surface conditions and different vehicle velocities. Then, dynamic responses are compared between the FRP slab bridge and a corresponding concrete slab bridge. Finally, the applicability of the AASHTO impact factors to FRP bridges is discussed.
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2006年第5期21-26,共6页
Journal of Railway Science and Engineering
关键词
FRP夹心桥面板
有限元
等效正交各项异性实心板
车桥耦合模型
动力特性
冲击系数
FRP sandwich panels
finite element method
equivalent orthotropic solid plate
vehicle- bridge coupled model
dynamic performance
impact factors
