钢桁式加劲梁悬索桥动力特性分析
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摘要
以某钢桁式加劲梁悬索桥为工程背景,引入只受拉三维拉索单元,采用考虑几何非线性的子空间迭代法对其自振特性进行了分析.重点分析钢管桁式加劲梁悬索桥的自振特性,分别就加劲梁竖曲线、散索装置等因素对钢桁式加劲梁悬索桥自振特性的影响进行了分析.分析成果为今后钢管桁式加劲梁悬索桥结构设计提供了动力性能方面的参考.
Taking a suspension bridge with steel truss stiffening girder as an engineering example,using 3-D tension-only element and adopting subspace iteration method,the natural vibration characteristics of suspension bridge is analyzed.The natural vibration characteristics of suspension bridge with steel truss girder is analyzed with factors such as vertical curve of stiffening girder,bulk cable installation,prestress of cable,boundary conditions and loading way of post-dead load.The article focuses on the natural vibration characteristics of steel truss girder suspension bridge,and the conclusion of this paper can provide dynamic characteristics basis for the design theory of suspension bridge with steel truss stiffening girder.
引文
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