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The Effect of Inclined Arch Rib on the Dynamic Stability of Leaning-Type Arch Bridge under Earthquake
Incorporating the Lyapunov theory of motion stability, the elastic dynamic stability program of a leaning-type arch bridge with 120m span is worked out via the modified freeing time method. The dynamic eigenvalue-time history curve and dynamic buckling modes are presented, and the effect of inclined arch rib on the dynamic stability of leaning-type arch bridge is analyzed and compared under the seismic exercitation in the longitudinal, transverse and vertical directions of the bridge. The results show that all of the dynamic buckling modes are out-plane instabilities when the effect of inclined arch rib is not considered, while dynamic stability coefficient increases by 6%, 56% and166% respectively when the effect of inclined arch rib is considered.
The Effect of Inclined Arch Rib on the Dynamic Stability of Leaning-Type Arch Bridge under Earthquake
Incorporating the Lyapunov theory of motion stability, the elastic dynamic stability program of a leaning-type arch bridge with 120m span is worked out via the modified freeing time method. The dynamic eigenvalue-time history curve and dynamic buckling modes are presented, and the effect of inclined arch rib on the dynamic stability of leaning-type arch bridge is analyzed and compared under the seismic exercitation in the longitudinal, transverse and vertical directions of the bridge. The results show that all of the dynamic buckling modes are out-plane instabilities when the effect of inclined arch rib is not considered, while dynamic stability coefficient increases by 6%, 56% and166% respectively when the effect of inclined arch rib is considered.
The Effect of Inclined Arch Rib on the Dynamic Stability of Leaning-Type Arch Bridge under Earthquake
Guo, Yu-Zhu (author) / Liu, Ai-Rong (author) / Yu, Qi-Cai (author)
2012
3 Seiten
Conference paper
English
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