Seismic analysis of half-through steel truss arch bridge considering superstructure

Li, Ruiqi; Yuan, Xinzhe; Yuan, Wancheng; Dang, Xinzhi; Shen, Guoyu

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자료유형: 학술저널

저자정보: Li, Ruiqi (State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University) Yuan, Xinzhe (State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University) Yuan, Wancheng (State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University) Dang, Xinzhi (State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University) Shen, Guoyu (State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University)

저널정보: 테크노프레스 Structural engineering and mechanics : An international journal Structural engineering and mechanics : An international journal 제59권 제3호

발행연도: 2016.1

수록면: 387 - 401 (15page)

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This paper takes a half-through steel truss arch bridge as an example. A seismic analysis is conducted with nonlinear finite element method. Contrast models are established to discuss the effect of simplified method for main girder on the accuracy of the result. The influence of seismic wave direction and wave-passage on seismic behaviors are analysed as well as the superstructure and arch ring interaction which is mostly related with the supported bearings and wind resistant springs. In the end, the application of cable-sliding aseismic devices is discussed to put forward a layout principle. The main conclusions include: (1) The seismic response isn't too distinctive with the simplified method of main girder. Generally speaking, the grillage method is recommended. (2) Under seismic input from different directions, arch foot is usually the mostly dangerous section. (3) Vertical wave input and horizontal wave-passage greatly influence the seismic responses of arch ring, significantly increasing that of midspan. (4) The superstructure interaction has an obvious impact on the seismic performance. Half-through arch bridges with long spandrel columns fixed has a less response than those with short ones fixed. And a large stiffness of wind resistant spring makes the the seismic responses of arch ring larger. (5) A good isolation effectiveness for half-through arch bridge can be achieved by a reasonable arrangement of CSFABs.

#half-through steel truss arch bridge #seismic performance #cable-sliding friction aseismic bearing

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