为研究附属设施对三箱梁涡激振动(vortex-induced vibration，VIV)的影响，以某公铁两用分离式三箱梁桥为背景，在XNJD-1回流串联风洞中进行了风洞试验。试验设置了多组工况，分别用于研究检修车轨道、单个梁上附属设施以及附属设施组合对三箱梁VIV的影响。对试验结果进行分析后发现，检修车轨道对三箱梁VIV特性的影响有限，公路风屏障会同时恶化竖向和扭转VIV，而铁路风屏障能够抑制VIV的发生，防撞护栏能够抑制竖向VIV但会激起扭转VIV。与防撞护栏相比，铁路风屏障在竖向VIV的抑制方面表现更为出色，而公路风屏障对竖向VIV的恶化作用要大于铁路风屏障和防撞护栏的抑制作用。公路风屏障是扭转VIV的主要激励源，带有公路风屏障的工况都产生严重的扭转VIV。通过计算流体动力学
数值模拟，对三箱梁的流场特征进行了分析，结果发现附属设施促进了主梁间隙中漩涡的生成与发展，从而加剧了三箱梁的涡激振动。

Here, to study effects of attachments on vortex induced vibration (VIV) of a triple-box girder bridge, taking a certain highway and rail way dual-use separated triple-box girder bridge as background, wind tunnel tests were conducted in XNJD-1 reflux series wind tunnel.Multiple sets of operating conditions were set up in tests to study effects of rail maintenance, single beam attachments and combinations of attachments on VIVs of triple-box girder.After analyzing the test results, it was shown that effects of rail maintenance on VIV characteristics of triple-box girder are limited; highway wind barriers can deteriorate both vertical and torsional VIVs, while railway wind barriers can suppress VIVs; crash barriers can suppress vertical VIVs but can also induce torsional VIVs; compared with crash barriers, railway wind barriers perform better in suppressing VIVs, while highway wind barriers have a larger deteriorating effect on vertical VIVs compared to suppressing VIV effects of railway wind barriers and crash barriers; highway wind barriers are main excitation source of torsional VIV, and working conditions with highway wind barriers produce severe torsional VIVs.Finally, by using computational fluid dynamics  numerical simulation, flow field characteristics of triple-box girder were analyzed, the results showed that attachments can promote generation and development of vortices in main beam gap, and intensify VIVs of triple-box.