跨海大桥桥面风环境的风洞试验

Wind tunnel test of wind environment above cross sea bridge deck

以福州至平潭高速公路跨海路段的海坛海峡大桥为工程背景,研究了该跨海大桥典型桥段设置不同规格风屏障和未设置风屏障的风环境。采用风洞试验的手段,建立桥面的缩尺模型,模拟了桥面、风屏障等,在桥面各车道设置了测力耙测量不同风向角下不同规格风屏障的桥面风剖面。风洞试验说明,设置风屏障是改善跨海大桥风环境的有效措施,而且不同的风向角会导致不同的桥面风剖面。因此,在分析桥面行车安全时要考虑风向角的影响。

The wind tunnel tests of typical bridge decks with and without wind screens are implemented for Haitan strait bridge which is located on the train line connecting Fuzhou city with Pingtan city.In the wind tests,the scale shorten models,bridge decks as well as wind screens are fabricated,and several force-measuring rakes are set on different lanes to measure wind profiles above the bridge decks under different wind angles.A series of wind tunnel tests illuminate that,installing wind screens is an effective measure to improve the wind environment above bridge decks,and different wind angles will lead to different wind profiles above bridge decks.Therefore,it is necessary to consider the impaction of wind angel on the safety of driving vehicles above bridge.