Comparison of Different Systems of the Stability of Cable-Stayed Bridge

Liu Fangping

Modern Applied Science, 2014, vol. 8, issue 2, 87

Abstract: This paper investigates the stability of cable-stayed bridge under three different structural systems. Fengjie Yangtze River Highway Bridge, A large-span prestressed concrete cable-stayed bridge in Chongqing is analyzed by using nonlinear finite element program ANSYS. The buckling mode and linear and nonlinear stability factors of the bridge are gained and compared by numerical simulation of three structural systems- floating, semi-floating and consolidation bridge structural systems, and their buckling mode and stability factors under two unfavorable live loads are compared. The results show- 1) only in-plane instability is induced regardless of the structure system; 2) the floating system is the most instable among the three; 3) Floating system with longitudinal elastic restraint on the main beam is an ideal structural system. This research provides an important theoretical basis for bridge design and construction.

Date: 2014
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