Abstract: This papor engaged thcoretical analysis and experimemtal test on interaction of two-cable installed along wind while cables of cable stayed bridge were vibrating induced by vortex. The study shows that the down- stream-cable which was locatde in the wake region of the upstream-eable could not vibrate with a large ampli- tude while the distance of two-cable L≤5D(D=cable diameter);But the down stream-eable has an amplig- ing effect on the vibration induced by vortex of upstream-eable while L=(4-6) D. This conclusion furnish- es reliable and useful reference data for arranging cables of eable stayed bridges.

Key words: cable stayed bridge, vibration induced by vortex, distance of two-cable

摘要： 本文针对斜拉桥缆索发生涡激振动时,顺流双排缆索间的相互干扰效应进行了理论分析和实验研究．研究结果表明:当两索间距Ｌ≤５Ｄ时,处于上游索尾迹区内的下游索发生大幅振动的可能性不大；当Ｌ＝４－６Ｄ时,下游索时上游索的涡激振动却产生增强作用．这时工程实际中斜拉桥缆索的合理布置,提供了可靠的理论依据．

关键词: 斜拉桥, 涡激振动, 索间距