自锚式斜拉-悬索协作体系桥的动力特性研究  

RESEARCH ON THE DYNAMIC CHARACTERISTICS OF SELF-ANCHORED CABLE-STAYED SUSPENSION BRIDGE

作　　者：张文静 顾民杰 王青桥 ZHANG Wenjing;GU Minjie;WANG Qingqiao(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,Shanghai 200092,China)

机构地区：[1]浙江大学建筑工程学院,杭州310058 [2]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《低温建筑技术》2020年第4期58-61,共4页Low Temperature Architecture Technology

摘　　要：自锚式斜拉-悬索协作体系桥相关力学研究较少,动力特性尚不明确,文中以宁波常洪大桥工程实例为背景,采用MIDAS Civil有限元模型和响应面法相结合的方法,探讨主要设计参数对协作体系动力响应的影响。结果表明,所建响应面函数模型具有较好的适用性和较高的分析精度;设计参数取值的调整对振型的影响较小,对自振频率的影响较为显著;在文中选取的矢跨比、斜跨比、斜拉索抗拉刚度和主缆抗拉刚度四个设计参数中,斜拉索抗拉刚度是影响协作体系动力特性的最敏感参数,可为同类工程设计提供参考借鉴。There are few mechanics research of self-anchored cable-stayed suspension bridge and the dynamic characteristics are also not clear.In this paper,on the base of Ningbo Changhong Bridge,the influence of main design parameters on the dynamic response of the collaborative system was discussed through combining the MIDAS Civil finite element model with the response surface method.The results show that the established response surface function model has better applicability and higher analysis accuracy;The adjustments of the design parameters value have smaller effect on the mode shape and have significant effect on the natural frequency;Among the four selected design parameters including the vector-span ratio,the diagonal-span ratio,the stayed cable tension stiffness,and the main cable tensile stiffness,the stayed cable tension stiffness is the most sensitive parameter that affects the dynamic characteristics of the cooperative system.The above conclusions may provide reference for similar engineering designs.

关 键 词：自锚式斜拉-悬索协作体系桥 有限元模型 响应面法 动力分析 

分 类 号：TU311.3[建筑科学—结构工程]