摘要
通过对车-桥耦合振动力学模型的分析,利用车轮和桥面的位移协调方程将车辆振动方程和桥梁振动方程联立求解并对T梁桥荷载横向分布规律进行了动力分析.结果表明:T梁桥荷载横向分布的动力规律与静力规律相比存在较大差异,荷载横向分布系数为时间的动态变化函数;车-桥耦合振动对于跨中挠度横向分布系数的影响很小,对于跨中梁底正应力横向分布系数、支点剪力横向分布系数的影响则不可忽视;荷载横向分布系数与车辆行驶速度之间虽无明确的变化规律,但是车辆行驶速度对跨中梁底正应力和支点剪力横向分布系数的影响应引起足够的重视;路面不平度等级对荷载横向分布系数的影响较小.
Based on the analysis of vehicle-bridge coupled vibration, the displacement compatibility equation between wheels and bridge deck is used to solve the problems, and a dynamic analysis of load lateral distribution for T-beam bridge is performed. Results show that the laws of dynamic and static load lateral distribution have greater differences. The load lateral distribution factor is the varying function of time, and the influence of vehi- cle-bridge coupled vibration can not be overlooked for lateral distribution factors of stress and shear force. Al- though no clear rule is found between vehicle speed and load lateral distribution factors, the influence of vehicle speed should never be ignored. Road surface roughness has little influence on load lateral distribution.
出处
《大连交通大学学报》
CAS
2014年第A01期28-32,共5页
Journal of Dalian Jiaotong University
关键词
车-桥耦合振动
T梁
荷载横向分布系数
车辆速度
路面不平度
vehicle-bridge coupled vibration
T-beam
load lateral distribution factor
vehicle speed
road surface roughness
