华中科技大学学报（自然科学版）2013，Vol.41Issue(1)：128-132,5.
箱梁悬索桥空气静力稳定的三重非线性效应
Three-nonlinear effect of aerostatic stability in steel box girder suspension bridges
摘要
Abstract
On the basis of the geometrical parameters, the load characteristics and the material one, the design parameters for girder and cable of double-pylon-three-span suspension bridges with span of 1 000, 1 500, 2 000, 3 000, 4 000 and 5 000 m were obtained. Then, finite element parametrical model for super long span suspension was developed. Thereafter, nonlinear aerostatic stability analysis of long-span suspension bridges was studied by including directly the three combined effects of nonlinear three-component displacement-dependent wind loads, geometric nonlinearity, and material nonlineari-ty. Furthermore, three-nonlinearity method in this paper were adopted to validate the aerostatic performances of super-long-span suspension bridges with four different girder types from ideal plate to double slotted steel box with six different main span lengths ranging from 1 000 to 5 000 m. The results of a numerical investigation based on wind tunnel tests allow to state that aerostatic instability of the long-span suspension bridge is caused by the three combined effects, especially nonlinear and geometric nonlinearity. Closed box is applicable in suspension bridges with a main span less than 2 000 m and slotted box is proved to be efficient in gaining stability longer than 2 000 m.关键词
钢箱梁悬索桥/空气静力稳定性/三重非线性/非线性效应/临界风速Key words
steel box girder suspension bridge/ aerostatic stability/ three-nonlinearity method/ nonlinear effect/ critical wind speed分类
交通工程引用本文复制引用
邵亚会,葛耀君,汪莲..箱梁悬索桥空气静力稳定的三重非线性效应[J].华中科技大学学报（自然科学版）,2013,41(1):128-132,5.基金项目
国家自然科学基金重大研究计划重点资助项目(90715039) （90715039）
中央高校基本科研业务费专项资金资助项目(2012QC0020). （2012QC0020）
