铁路预应力混凝土连续梁桥竖向有载自振频率研究  

A Study of the Free Frequencies of the Continuous Pre-stressed Concrete Bridges of Vertically-loaded Railways

作　　者：任剑莹[1] 李文平[2] 苏木标[3] 

机构地区：[1]石家庄铁道学院工程力学系,河北石家庄050043 [2]石家庄铁道学院土木分院,河北石家庄050043 [3]石家庄铁道学院大型结构健康诊断与控制研究所,河北石家庄050043

出　　处：《国防交通工程与技术》2004年第4期23-25,共3页Traffic Engineering and Technology for National Defence

摘　　要：计算了当20辆相同的提速客车通过40 m+4×72 m+40 m部分预应力混凝土六跨连续箱形梁桥时,车辆参数对桥梁竖向有载自振频率的影响。结果表明,车辆轮对簧下质量、车辆轮对悬挂弹簧刚度、车辆长度、车体质量等对桥梁竖向有载自振频率有影响,而列车的行车速度对桥梁竖向有载自振频率没有影响。The influence of vehicle parameters on the vertical loaded free frequencies is calculated, when 20 same high-speed passenger vehicles are traveling on the bridges. The results show that the vertical loaded free frequency of the continuous pre-stressed concrete bridge is related to the lower spring mass and the stiffness of the spring for each wheel-set of the vehicle, the vehicle's length and the mass of the vehicle. However, it is independent of the velocity of the train.

关 键 词：车辆轮对 预应力混凝土连续梁桥 桥梁 自振频率 提速客车 车辆参数 车体 竖向 部分预应力混凝土 连续箱形梁 

分 类 号：U448[建筑科学—桥梁与隧道工程] TU473[交通运输工程—道路与铁道工程]