Flutter characteristics of twin-box girder bridges with vertical central stabilizers

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• 作者：Yongxin Yang^a ; Rui Zhou^a ; ^{zhourui_88@163.com} ; Yaojun Ge^a ; Xiaojie Zou^a ; Lihai Zhang^b
• 关键词：Twin-box girder ; Vertical central stabilizer ; Slot width ratio ; Flutter instability ; Aerodynamic damping ; Flow structures ; Selberg formula
• 刊名：Engineering Structures
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：133
• 期：Complete
• 页码：33-48
• 全文大小：4350 K
• 卷排序：133

文摘

Wind tunnel tests were conducted to characterize the critical flutter wind speed of twin-box girder bridges with various slot width ratios and vertical central stabilizers. 2D-2DOF analysis revealed the flutter mechanism from flutter derivative, aerodynamic damping, degrees participation level in 2-DOF vibration. CFD simulation showed that large vortices and pressure distribution under central slotting because of vertical central stabilizers could potentially affect the flutter performance. The modified Selberg formulas could predict the critical flutter wind speed of twin-box girders.