Stability Analysis of Special-Shape Arch Bridge
學年 99
學期 1
出版(發表)日期 2010-12-01
作品名稱 Stability Analysis of Special-Shape Arch Bridge
作品名稱(其他語言) 異型拱橋的穩定分析
著者 Qiu, Wen-liang; Kao, Chin-sheng; Kou, Chang-huan; Tsai, Jeng-lin; Yang, Guang
單位 淡江大學土木工程學系
出版者 新北市:淡江大學
著錄名稱、卷期、頁數 Tamkang Journal of Science and Engineering=淡江理工學刊 13(4), pp.365-373
摘要 This paper presents a stability investigation of a special-shape arch bridge with a span of 180 m. Its structure and mechanics are significantly different from normal arch bridges because of its single arch rib skewing across the girder, its hangers hanging unevenly along the arch rib with different aslant angle, and its arch rib being subjected to massive axial compression force, bending moment, torque, and shear stress. In this paper, the eigenvalue method is used to analyze some of the main influencing factors, such as different loads, restraint conditions of arch spring, stiffness of arch rib, stiffness of main girder and rise-span ratio of arch rib. The study results showed that the slant hangers at both sides of the girder reduced the tendency of arch instability, which is obviously helpful to maintain overall structural stability. Increasing the height of the main girder can improve the structural stability, but the effect is limited. The restrained conditions of the arch spring markedly influence the overall structural stability, and the stability coefficient of a fixed arch is more than twice the coefficient of a two-hinge arch. The rise-span ratio has a relatively large impact on the stability coefficient. A reasonable rise-span ratio for the special-shape arch bridge studied here is around 0.37 that is larger than an expected ratio for a normal arch bridge obtained in existed studies. The impacts of vertical flexural stiffness and lateral flexural stiffness of the arch rib on the structural stability are determined by the mode of buckling, and the lateral flexural stiffness has nearly no impact on the structural stability for an in-plane buckling arch.
語言 en
ISSN 1560-6686
期刊性質 國內
收錄於 EI
通訊作者 Kao, Chin-sheng
國別 TWN
出版型式 ,電子版,紙本

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