湖南大学学报（自然科学版）2017，Vol.44Issue(5)：80-87,8.DOI:10.16339/j.cnki.hdxbzkb.2017.05.010
流线型箱梁断面涡激力展向相关试验研究
Experimental Study on Spanwise Correlation of Vortex-excited Forces of a Streamlined Box Girder
摘要
Abstract
Aiming at spanwise correlation of vortex-induced forces (VIFs) of the main deck of bridges, wind tunnel experimens of an oscillating and stationary streamlined box girder were conducted under different wind attack angles in the smooth flow.The VIV responses, spanwise correlation of vortex-excited forces, and surface pressures of the streamlined box girder were investigated.The research results showed that the spanwise correlation coefficients of the vortex-excited forces of the streamlined box girder were related to the amplitudes and wind speeds in the lock-in region.The spanwise correlation coefficients of the vortex-excited forces of the main deck at ascending stage of the lock-in region were larger than that of the main deck at the maximum amplitude of the lock-in region.The spanwise correlation coefficients of the pitch moments of the main deck in torsional VIV were larger than that of the lift forces of the main deck in vertical VIV.Meanwhile, the spanwise correlation coefficients of the pressures on measure points of the main deck were related to the amplitudes of the oscillating main deck, and the spanwise correlation coefficients increased with the increase of the amplitudes.关键词
桥梁/流线型箱梁断面/涡激振动/展向相关性/风洞试验Key words
bridges/streamlined box girder/vortex-induced vibrations(VIV)/spanwise correlation/wind tunnel tests分类
交通工程引用本文复制引用
刘志文,龚慧星,陈政清..流线型箱梁断面涡激力展向相关试验研究[J].湖南大学学报（自然科学版）,2017,44(5):80-87,8.基金项目
国家自然科学基金资助项目(51178181,51478180),National Natural Science Foundation of China(51178181,51478180) （51178181,51478180）
湖南省高校创新平台开放基金项目(11K015),Innovation Platform Open Funds for Universities in Hunan Province(11K015) （11K015）
