期刊
ENGINEERING STRUCTURES
卷 161, 期 -, 页码 250-264出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2018.01.062
关键词
Suspension bridge; Continuum model; Three-dimensional main cable; Hanger extensibility; Moving loads
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [NRF-2015R1D1A1A09060113]
In this paper, a continuum model is proposed for static and dynamic analyses of a three-span suspension bridge with three-dimensionally curved main cables. To obtain equations of motion for this model, coupled differential equations are derived for vertical displacements of a main cable and a girder as well as lateral displacements of a main cable subjected to external loads. A compatibility equation of a three-dimensionally curved cable is also' derived. Utilizing the Galerkin method, the equations of motion are obtained in matrix form. A case study bridge; is used to verify the continuum model against a finite element model. Verification results show that, for distributed static loads on the girder and temperature changes in the main cable and the hangers and for dynamic moving loads on the girder, the continuum model can accurately determine static and dynamic responses, namely displacements, velocities, accelerations, bending moments, and shear forces of the girder and additional horizontal forces in the main cable.
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