Analysis of Strain Responses of Long Span Steel Truss Arch Bridge Under Action of High-Speed Trains

被引：0

作者：

Zhao, Han-Wei ^{[1
]}

Ding, You-Liang ^{[1
,2
]}

Li, Ai-Qun ^{[3
]}

机构：

[1] Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing,210096, China

[2] Key Laboratory of Large Structure Health Diagnosis and Control of Hebei Province, Shijiazhuang,050043, China

[3] Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing,100044, China

来源：

Bridge Construction | 2017年 / 47卷 / 04期

关键词：

Monitoring - Railroads - Indium compounds - Trusses - Arch bridges - Arches - Railroad transportation - Speed - Railroad cars - Steel bridges;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

To understand the dynamic response characteristics of the long span steel truss arch bridge under the action of the high-speed trains and ambient temperatures, the dynamic strain responses of the bridge under the action of the high-speed trains were analyzed based on the long-term monitoring data of the dynamic strain, temperatures and train speeds acquired by the structural health monitoring system of Nanjing Dashengguan Changjiang River Bridge in the year of 2015 and the correlativity characteristics between the strain influence lines and temperatures and between the strain dynamic factors and train speeds of the critical components of the bridge were studied. The results of the analysis and study reveal that under the action of the high-speed trains, the maximum value of the strain influence lines of the arch spring trusses of the bridge is the greatest, of the main arch trusses and side span trusses is secondary and of the hangers is the least. The strain dynamic factor values of the hangers are a bit great. The strain influence lines of the different components of the bridge have obvious correlativity with the temperatures. In the complex load areas, the correlativity exhibits the high-order correlativity while in the simplex load areas, exhibits the linear correlativity. The strain dynamic factors of the components are correlated with the train speed linearity. As the train speeds increase, the strain dynamic factors of the side span trusses, hangers and main arch trusses rise up while those of the arch spring trusses fall down. © 2017, Journal Press, China Railway Bridge Science. All right reserved.

引用

页码：30 / 35