Numerical Modelling and Dynamic Response Analysis of Curved Floating Bridges with a Small Rise-Span Ratio

Journal of Marine Science and Engineering

Dongqi Jiang¹  Jian Dai²  Ling Wan³ 

[1] Department of Civil Engineering, School of Science, Nanjing University of Science and Technology, Nanjing 210094, China;Department of Marine Technology, Norwegian University of Science and Technology, 7491 Trondheim, Norway;Faculty of Science Agriculture and Engineering, Newcastle University, Singapore 599493, Singapore;

关键词: floating bridge;    integrated hydro-structural analysis;    dynamic response;    curved bridge;    bridge structural design;   

DOI  :  10.3390/jmse8060467

来源: DOAJ

【 摘 要 】

As a potential option for transportation applications in coastal areas, curved floating bridges with a same small specified rise to span ratio of 0.134, supported by multiple pontoons, are investigated in this paper. Two conceptual curved bridges are proposed following a circular arc shape with different span lengths (500 and 1000 m). Both bridges are end-connected to the shoreline without any underwater mooring system, while the end-connections can be either all six degrees of freedom (D.O.F) fixed or two rotational D.O.F released. Eigen value analysis is carried out to identify the modal parameters of the floating bridge system. Static and dynamic analysis under extreme environmental conditions are performed to study the pontoon motions as well as structural responses of the bridge deck. Deflections and internal forces (axial forces, shear forces, and bending moment) are thoroughly studied with the variation of the span length and end support conditions in terms of the same specified small rise-span ratio. The ratio of axial force to horizontal bending moment are presented. From the study, it is found that the current parameters for the bridge are relatively reasonable regarding responses. However, the small rise-span does not provide enough arch effects. A higher rise-span ratio or stiffer bridge cross-sectional property is preferred, especially for the long bridge. In addition, the flexible end connections are preferred considering the structural responses at the end regions.

【 授权许可】

Unknown