大跨度斜拉桥与T构协作体系的动力特性分析  

Analysis of Dynamic Characteristics of Collaborated System with Long-span Cable-stayed Bridge and T-shape Rigid Structure

作　　者：余报楚[1] 张哲[2] 朱巍志[2] 李斐然[2] 

机构地区：[1]大连水产学院土木工程学院,辽宁大连116023 [2]大连理工大学桥梁工程研究所,辽宁大连116023

出　　处：《公路交通科技》2007年第4期84-88,98,共6页Journal of Highway and Transportation Research and Development

摘　　要：协作体系的动力特性主要包括体系的自振频率和主振型,它是协作体系结构动力分析的基础和前提。通过建立空间有限元模型,对金马大桥这种独特的协作体系结构进行了动力特征分析,给出了前20阶频率和相应的振型,并且对同等跨径的普通斜拉桥和剪力铰方案做了相应的动力特征比较分析,同时分别计算了各种结构参数变化对协作体系结构动力特性的影响,对其影响规律作了详细的讨论,本文的结果为协作体系的固有振动分析和抗震设计提供了理论依据。Dynamic characteristics of collaborated system mainly include natural vibration frequency and principal mode, which is the base and precondition of dynamic analysis for collaborated system. Jinma bridge, a unique super-cooperature system structure, is taken as an example, dynamic characteristics analysis and the first 20 oder frequencies and corresponding vibration modes are given by using space finite element model, at the same time, different structural system and the effects of varieties of structural parameters on dynamic characteristics of collaborated system are calculated. Detailed effects of the impact factors are discussed which provide theoretical basis for natural vibration analysis and earthquake-resistant design of collaborated system.

关 键 词：桥梁工程 大跨度斜拉桥 空间有限元模型 协作体系 结构参数 动力特性 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]