南京小龙湾大桥动力特性分析

英文篇名：Dynamic Characteristics Analysis of Nanjing Xiaolongwan River Bridge
中文刊名：南京工程学院学报(自然科学版)
英文刊名：Journal of Nanjing Institute of Technology(Natural Science Edition)
作者：刘贝 ; 郭霖华 ; 杨小平 ; 李建慧
英文作者：LIU Bei1 ; GUO Lin-hua2 ; YANG Xiao-ping3 ; LI Jian-hui4(1.School of Civil Engineering ; Key Laboratory for Concrete and Prestressed Concrete Structures of Education Ministry ; Southeast University ; Nanjing 210096 ; China ; 2.Nanjing Jiangning Urban Construction Group Co. ; Ltd. ; Nanjing 210096 ; China ; 3.Nanjing Municipal Design Institute Limited Liability Company ; Nanjing 210096 ; China ; 4.Nanjing GuoBo Civil Engineering Technology Co. ; Ltd. ; Nanjing 210096 ; China)
中文关键词：自锚式悬索桥 ; 地锚式悬索桥 ; 结构参数 ; 动力特性
英文关键词：self-anchored suspension bridge ; earth anchored suspension bridge ; structural parameters ; dynamic characteristics
出版日期：2013-06-15
机构：东南大学土木工程学院混凝土及预应力混凝土结构教育部重点实验室;南京江宁城市建设集团有限公司;南京市市政设计研究院有限责任公司;南京国博土木工程技术有限公司;
年：2013
期：02
出版单位：南京工程学院学报(自然科学版)

摘要

以南京小龙湾大桥为研究对象,基于自锚式悬索桥合理成桥状态空间有限元模型,研究结构参数变化对其动力特性的影响,并与相同结构参数的地锚式悬索桥模型进行对比.结果表明:自锚式悬索桥由于塔顶位移约束程度较弱以及主梁承受主缆传来的水平分力,减小了结构体系的刚度,因而比相同结构参数的地锚式悬索桥的振动频率小;恒载、加劲梁竖向刚度和主缆刚度的变化对结构的低阶频率影响较大.研究结果可为类似结构动力特性分析提供参考.
Taking Nanjing Xiaolongwan River Bridge as an example,this paper studies the influence of structural parameters on its dynamic characteristics based on the spatial finite element model of reasonable bridge state of self-anchored suspension bridges.This model is then compared with that of earth anchored suspension bridge of the same structural parameters.The results show that the vibration frequency of self-anchored suspension bridge is lower than that of earth anchored suspension bridge,since the stiffness of the structural system is reduced by lesser extent of displacement constraints on the top of the tower and the horizontal component from main cable of the main beam;besides,the low-level frequency of the structure is significantly influenced by dead load,the stiffening girder vertical stiffness and the stiffness of the main cables.The results can be used in similar structure dynamic characteristics analysis.

引文

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