高墩大跨连续刚构桥线性与非线性稳定研究

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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.

Key words： high pier linear stability nonlinear stability confined concrete safety storage coefficient

Received: 22 December 2014

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	Articles by authors
	WU Liang-qin
	TIAN Shan-po
	CHEN Shui-sheng
	LIU Tao

Cite this article:

WU Liang-qin,TIAN Shan-po,CHEN Shui-sheng, et al. Research on Linear and Nonlinear Stability of Long-span Continuous Rigid Frame Bridge with High Pier[J]. 铁道工程学报, 2015, 32(6): 29-33.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2015/V32/I6/29

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