摘要
制作了一套测力系统,测定了主跨为926 m的鄂东长江公路大桥在斜风下主梁的三分力系数,并把所得的结果与用传统的斜风分解法所得的结果进行了对比,发现二者不一致.这表明:基于用传统的斜风分解法得到的三分力系数进行斜风下大跨度桥梁主梁风荷载计算是不合适的,必须通过风洞试验实测斜风下主梁的三分力系数.
A force-measurement system was made and used to measure the aerodynamic coefficients of the deck of E-dong Yangtze River Highway Bridge, with a main span of 926 meters, under skew winds. The results were compared with those obtained by using the traditional yaw wind-decomposition method. It was found that aerodynamic coefficients obtained by using two methods did not agree with each other. This suggests that it is not suitable to evaluate wind loads on the deck of long span bridges, based on aerodynamic coefficients obtained by using the yaw wind-decomposition method. So it is quite necessary to measure the aerodynamic coefficients of the deck through wind tunnel tests under skew winds.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第9期10-14,共5页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(50608030)
关键词
斜风
三分力系数
大跨度桥梁
风洞试验
skew winds
aerodynamic coefficients
long span bridge
wind tunnel test
