考虑抗风索作用的简易吊桥动力响应分析

Simple Dynamic Response Analysis Considering the Effect of Wind Cable Suspension Bridge

简易吊桥作为非永久性使用桥梁,往往忽略动力特性分析。基于云南怒江某简易吊桥,建立动力特性及地震响应分析模型,分析了有无抗风索作用下的吊桥模态情况及内力、位移分布特性等。结果表明,在有抗风索的情况下吊桥自振频率明显提高,地震荷载作用下的主梁受力性能及位移约束大大改善。

Simple suspension bridge as non permanent bridge,tend to ignore the dynamic characteristics analysis. Based on a simple suspension bridge on the Nu River in Yunnan,the analysis model of dynamic characteristics and seismic response is established to analyze wind cable of suspension bridge modal and the internal force and displacement distribution characteristics such as. The results showed that the wind cable suspension bridge self vibration frequency increased significantly and the stress performance and displacement constraint of main girder greatly improved under seismic loading.