Geometrically Nonlinear Stability Study of Self-Anchored Arch-Suspension Bridges

Abstract:

The self-anchored arch-suspension bridge is characterized by innovative structure and beautiful shape. In order to research the mechanical characteristics and stability of this structure that has never been built, the proposed preliminary design of the combined system bridge with a main span of 406m is studied. On the basis of the transfer mechanism of live load based on the deflection theories of suspension bridges and arch bridges, the stability of the combined system bridge is analyzed in this paper. The universal finite element software ANSYS is applied to study the linear elastic stability and the geometrically non-linearity stability under six load cases. The study indicates that the transfer mechanism of live load is determined by the distribution of the stiffness. There is no possibility of in-plane instability under live load. The first-order linear elastic instability mode shows the shape of lateral flexure of the junction at mid-span, and the geometrically nonlinear stability is controlled by the lateral flexure. These conclusions can be of some value for the design, calculation and operation management of this structure.

• Periodical: Applied Mechanics and Materials (Volumes 90-93)
• Pages: 1137-1143
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.90-93.1137
• Online since: September 2011
• Authors: Jing Qiu, Guang Feng Li, Rui Li Shen
• Keywords: Geometric Nonlinearity, Self-Anchored Arch-Suspension Bridges, Stability, Transfer Mechanism of Live Load

References

[1] Jianhua Hu, Lianhua Wang, Ruili Shen, Jianjun Xiang and Maolin Tang: Journal of Hunan University, Vol. 35, No. 7 (2008), pp.12-15 (In Chinese)

[2] Xuming Song: A study of mechanical characteristics and ultimate load-carrying capacity of long span self-anchored suspension bridge, Doctor's degree dissertation, Reserved in Central South University (2009) (In Chinese)

[3] Song Li, Shizhong Qiang and Ying Tang: Journal of Southwest Jiaotong University, Vol. 42, No. 3 (2007), pp.293-298 (In Chinese)

[4] Junsheng Peng and Jinping Zhang: Journal of Southwest Jiaotong University, No. 3 (1993), pp.105-111 (In Chinese)

[5] Yizhi Bu and Xingwang Yang: Journal of Southwest Jiaotong University, Vol. 37, No. 4 (2002), pp.357-361 (In Chinese)

[6] Lei Zhao, Can Huang and Fangwen Wu: Journal of Earthquake Engineering and Engineering Vibration, Vol. 28, No. 3 (2008), pp.116-121 (In Chinese)

[7] Dongsheng Qian and Renfu Chen: Design and construction of long span suspension bridge, Southwest Jiaotong University Press, (1999) (In Chinese)

[8] Ziqing Li: Journal of East China Highway, No. 2 (1994), pp.18-21 (In Chinese)

[9] Haifan Xiang: Advanced theory of bridge structure, China Communications Press, (2007) (In Chinese)

[10] Xuanhai Huo: Deflection theory of arch bridge, China Communications Press, (1997) (In Chinese)