Estimation method for the fundamental frequency of a three-span suspension bridge with asymmetric side-span

doi:10.13465/j.cnki.jvs.2018.10.028

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Estimation method for the fundamental frequency of a three-span suspension bridge with asymmetric side-span
	Yang, Guojun 1,2; Du, Yongfeng 1; Hao, Xianwu 2; Li, Ziqing 2; Wang, Xiaoming 2
刊名	Zhendong yu Chongji/Journal of Vibration and Shock
	2018-05-28
卷号	37 期号:10 页码:194-201 and 224
关键词	Elastic waves Machine vibrations Natural frequencies Suspension bridges Bridge engineering Continuous girders Free vibration Fundamental frequencies Rayleigh-ritz
ISSN号	10003835
DOI	10.13465/j.cnki.jvs.2018.10.028
英文摘要	In order to calculate the vibration frequencies of suspension bridges with asymmetric arrangement more rapidly, a three-span continuous girder suspension bridge with double-tower and asymmetric side-span was taken as research object. The frequency formulas for the 1st vertical and torsional vibration modes were derived based on the Rayleigh-Ritz's method considering the influence of asymmetric side-span on vibration frequencies, and the generality of the formulas was discussed. The estimation formula for the fundamental frequency of the single-span suspension bridge was obtained by resolving the limit of some related parameters of the three-span suspension bridge with asymmetric side-span. Finally, the accuracy of the proposed formulas was examined by the finite element method (FEM). The results show that the errors between the frequencies of 1st anti-symmetric vertical and torsional vibration modes calculated by the proposed method and the FEM are 9.2% and 6.7%,while the errors between the frequencies of 1st symmetric vertical and torsional vibration modes calculated by the proposed method and the FEM are 5.0% and 4.4%,which can meet the requirement of design phase. Finally, the influence of the correlation coefficient on the fundamental frequency was discussed. The results indicate that the proposed formulas can be applied to guide the scheme selection and preliminary design of the simple-supported single-span or the three-span continuous girder suspension bridges with asymmetric side-span. © 2018, Editorial Office of Journal of Vibration and Shock. All right reserved.
语种	中文
出版者	Chinese Vibration Engineering Society
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114539]
专题	土木工程学院
作者单位	1.Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Highway, Chang'an University, Xi'an; 710064, China
推荐引用方式 GB/T 7714	Yang, Guojun,Du, Yongfeng,Hao, Xianwu,et al. Estimation method for the fundamental frequency of a three-span suspension bridge with asymmetric side-span[J]. Zhendong yu Chongji/Journal of Vibration and Shock,2018,37(10):194-201 and 224.
APA	Yang, Guojun,Du, Yongfeng,Hao, Xianwu,Li, Ziqing,&Wang, Xiaoming.(2018).Estimation method for the fundamental frequency of a three-span suspension bridge with asymmetric side-span.Zhendong yu Chongji/Journal of Vibration and Shock,37(10),194-201 and 224.
MLA	Yang, Guojun,et al."Estimation method for the fundamental frequency of a three-span suspension bridge with asymmetric side-span".Zhendong yu Chongji/Journal of Vibration and Shock 37.10(2018):194-201 and 224.