自锚式斜拉-悬吊协作体系动力特性及模型试验研究

Dynamic behavior and model test of combined cable-stayed and self-anchored suspension system

自锚式斜拉-悬吊协作体系桥作为一种新的大跨径桥型,综合了悬索桥和斜拉桥的特点,对其动力特性的研究十分重要.利用大型通用程序ANSYS建立空间有限元模型,用子空间迭代法对这种新型结构的动力特性进行了计算分析.同时通过动力模型试验对其动力特性进行研究,模型试验结果与理论分析相吻合,说明用现有的有限位移理论分析自锚式斜拉-悬吊协作体系的动力特性,并进行抗风、抗震设计是可靠的.

The combined cable-stayed and self-anchored suspension bridge is a new long-span bridge, which combines the features of both suspension bridge and cable-stayed bridge, so the research on its dynamic behavior is very important. The space model of this system was built by ANSYS software and its dynamic result is calculated by the subspace iteration. Model test is used to research into dynamic behavior of this system and the results of the experiment are consistent with those of theoretical analysis. Based on the conclusions of the test, it is found that it is reliable to analyze the dynamic characteristics of this combined system and conduct wind-resistance and seismic-resistance by finite displacement theory.