摘要
本文用实测数据分析了影响公路桥梁动力系数的主要因素,并扼要地阐述了动力系数变化的机理。实验表明,动力系数最大值集中在结构固有频率某一范围,并非与跨长成单一的函数关系。根据29座桥梁的实测值初步建立了动力系数包络图。
The main factors influencing the dynamic load allowance are analysed based on measured data and the law governing the variation of dynamic load allo -wance is discussed briefy in this paper.The experiments show that the maximum dynamic load allowance always falls on certain range of the natural frequency,bridge structure is not a unique function of the span length.An enveloping curve for the dynamic load allowance is built up tentatively through measured data of 29 qridges.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
1991年第2期57-64,共8页
China Journal of Highway and Transport
关键词
动力系数
行车速度
桥
固有频率
Dynamic load allowance
velocity of vehicle
Frequency ratio
Deck evenness
Natural frequency
