摘要
根据斜拉桥拉索的振动特点 ,引入动力计算长度概念 ,将两端固支的拉索振动模型动力等效成两端铰结的拉索振动模型 ,从而解决了多年来振动法测估索力时遇到的确定有效计算长度的难题 ,可广泛应用于振动法测估各类拉索的索力 ,具有精度高 ,概念清楚 ,使用方便等特点。
According to vibration nature of cable in cable stayed bridges,the dynamic calculating length is proposed,and the vibration model of inclined cables clamped at both ends is dynamically equated with the one of inclined cables with simply supported conditions at both ends.As a result,the difficult problems for the calculating length of inclined cables selected have been resolved when cable tension is measured with vibration method,and the principle is widely used for field measurement of cable tension during the construction of cable system bridges such as cable stayed bridges etc.The examples show that the method is high in accuracy,clear in concept and convenient in practice.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2001年第3期70-72,共3页
China Journal of Highway and Transport
关键词
斜拉索
振动法
索力
自振频率
动力计算长度
斜拉桥
inclined cable
vibration method
cable tension
natural frequency
dynamic calculating length
