Abstract：Research purposes:The stability in the state of the maximum cantilever is crucial to long-span continuous
rigid frame bridge with high pier constructed by segmental cantilever casting method. In this paper, the long-span
continuous rigid frame bridge(90 m+168m+90 m)with high pier in Shanxi provincewas taken as an engineering
background，and the maximum cantilever of pier No. 2 was selected as a research objective to conduct comprehensive
study on linear and nonlinear stability of the bridgeunder two conditions of normal operation and unilateral drop of
cradle. On the basis，the two kinds stability problems and the nonlinear stability of thehigh pier with or without
considering hoop reinforcement effect were made by introducing the conception of stability safety storage coefficient.
Research conclusions:(1)The weight of the bridge plays a key role in controlling linear stability.(2)Wind load does
not affect linear stability of the bridge，but has obvious effects on nonlinear stability of the bridge.(3)Analysis method
and evaluation standard of linear stability is suitable for the long-span continuous rigid frame bridge with high pier.
(4)As for columns considering confinement effect of ordinary hoops，limit value of stabilization coefficient of 4~5 is stillsuitable. However, for columns without considering confinement effect of ordinary hoops，limit value of stabilization
coefficient should be increased properly.(5)The results may be referenced in structural design and construction of
long-span continuous rigid frame bridge with high pier.
吴亮秦，田山坡，陈水生，刘涛. 高墩大跨连续刚构桥线性与非线性稳定研究[J]. 铁道工程学报, 2015, 32(6): 29-33.
WU Liang-qin,TIAN Shan-po,CHEN Shui-sheng,LIU Tao . Research on Linear and Nonlinear Stability of Long-span Continuous Rigid Frame Bridge with High Pier. 铁道工程学报, 2015, 32(6): 29-33.
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