Comparison of Ambient Vibration Response of the Runyang Suspension Bridge under Skew Winds with Time-Domain Numerical Predictions
Comparison of Ambient Vibration Response of the Runyang Suspension Bridge under Skew Winds with Time-Domain Numerical Predictions
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DOI：
10.1061/(asce)be.1943-5592.0000168
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发表时间：
2011-07
影响因子：
3.6
通讯作者：
Hao Wang;Ai-qun Li;R. Hu
中科院分区：
文献类型：
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作者：
Hao Wang;Ai-qun Li;R. Hu
总结了现有的处理斜风的抖振理论和方法。描述了一种改进的平均风分解方法，该方法直接使用结构健康监测系统的风监测数据。提出了一种时域抖振分析方法，并在ANSYS中实现，该方法将自激力建模为气动弹性刚度和阻尼单元矩阵，采用Matrix27单元。整个数值计算过程在MATLAB和ANSYS中实现，输入数据非常简洁，可以方便地计算出抖振响应。将该方法应用于台风马莎期间润阳悬索桥的抖振分析。利用实测的风特性数据，建立有限元模型预测桥梁的抖振响应。将预测的抖振响应与现场实测结果进行了比较。计算结果与实测值吻合较好，验证了该方法的有效性。
Existing buffeting theories and methods for dealing with skew winds are summarized. A modified version of the mean wind decomposition method is described that directly uses wind monitoring data from structural health monitoring systems. A method for time-domain buffeting analysis is presented and implemented in ANSYS, in which self-excited forces are modeled as elemental aeroelastic stiffness and damping matrices by element Matrix27. The entire numerical procedure is implemented in MATLAB and ANSYS, and the buffeting responses can be conveniently computed with very concise input data. This method is applied to the buffeting analysis of the Runyang Suspension Bridge during Typhoon Matsa. The measured data of wind characteristics are used to predict the buffeting responses of the bridge with a finite-element model. The predicted buffeting responses are compared with those from field measurements. A reasonably good agreement between the calculation and the measurement validates the effectiveness of the metho...