结构参数变化对自锚式斜拉-悬吊协作体系桥动力特性的影响  

Effect of the Variations of the Structural Parameters on the Dynamic Characteristics of the Self-anchored Cable-stayed Suspension Bridge System

作　　者：张永军 

机构地区：[1]中铁十九局集团第五工程有限公司,辽宁大连116100

出　　处：《建材技术与应用》2009年第1期1-3,共3页Research and Application of Building Materials

摘　　要：自锚式斜拉-悬吊协作体系桥的动力特性主要包括体系的自振频率和主振型,它是自锚式斜拉-悬吊协作体系桥动力分析的基础和前提。以大连港跨海大桥设计方案为工程背景,通过建立空间有限元模型,给出了前10阶频率和相应的振型,分析了加劲梁刚度、主塔刚度等结构参数变化对自锚式斜拉-悬吊协作体系桥动力特性的影响,对其影响规律进行了讨论。Dynamic characteristics of self - anchored cable -stayed suspension bridge system mainly include its natural vibration frequencies and principal modes, which are the basis and precondition of the dynamic analysis of the self - anchored cable - stayed suspension bridge system. On the basis of the design for the Dalian Harbor sea - span bridge system, a self - anchored cable- stayed suspension bridge system with the main span of 800 m, and through the foundation of the space finite element model, the first 10 frequencies and corresponding vibration modes are made. The influence of the variations of the structural parameters, such as the rigidity of the stiffening girders and the stiffness of the main towers, on the dynamic characteristics of the self - anchored cable - stayed suspension bridges system is analyzed and furthermore, the influential regularities are discussed in detail.

关 键 词：自锚式 结构参数 动力特性 

分 类 号：U441[建筑科学—桥梁与隧道工程]