Experimental and Analytical Research of Active Control for Traffic-Induced Vibration of Bridge

本研究尝试将输出反馈控制和h∞控制两种主动控制理论应用于桥梁模型的交通诱导振动。通过模型实验验证了主动控制的有效性和准确性。此外，为了明确主动控制对实际桥梁的控制效果，以阪神高速梅田入口大桥因大型自卸车引起的响应数据为基础，对主动控制进行了理论分析。讨论了两种主动控制方法的适用性和精度，并对控制结果进行了比较。从输出反馈控制和h -∞控制的结果来看，h -∞控制比输出反馈控制更能有效地减小弯曲振动和弯扭耦合振动。另一项尝试是确认行人荷载引起的人行桥振动主动控制的有效性。该桥跨度30.1m，宽度3.4m，常发生振动不适的投诉。这座桥位于一个大型活动大厅的前面，许多行人在活动期间使用这座人行桥。为了解决这一问题，首先根据现场试验中感受振动的问卷调查结果，对实际振动范围进行了检验。其次，在几种步行力模型中寻找与现场实验结果相匹配的步行力模型；最后，采用调谐质量阻尼器（TMD）、输出反馈控制、h∞控制和模糊控制进行控制分析。结果表明，TMD不能降低人群行走引起的振动。研究还表明，所有主动控制都能有效地降低TMD无法降低的振动。此外，与其他控制方法相比，h -∞控制可以以更小的功耗降低振动。少

This study attempted to apply two active control theories by introducing output feedback control and H-infinity control to traffic-induced vibration of bridge models. The efficiency and accuracy of the active controls were confirmed through model experiments. Furthermore, in order to clarify the control effect for the actual bridges, a theoretical analysis of the active controls were carried out based on the data of a response of Umeda Entrance Bridge of Hanshin Expressway due to a large dump truck. The applicability and accuracy of two active controls were discussed with a comparison of control results. From the results of output feedback control and H-infinity control, it was found that H-infinity control could reduce the bending vibration and coupled vibration of bending and torsion more effective than output feedback control.Another attempt was made to confirm the effectiveness of the active control for the vibration of a footbridge induced by pedestrian loads. The observation foot … More bridge with span length of 30.1m and width of 3.4m often occurs complaints about an uncomfortable vibration. The bridge is located in front of a big event hall, in which many pedestrians use the footbridge during events. To solve this problem, first, the actual vibration range was examined from questionnaire results of feeling vibration in the field experiment. Second, the appropriate walking force model that matches the field experimental result was investigated among several walking force models. Finally, control analyses were carried out by applying tuned mass damper (TMD), output feedback control, H-infinity control and Fuzzy control. From the results, it was found that the TMD could not reduce the vibration induced by crowd walking. It was also clarified that all active controls could reduce effectively the vibration that was not reduced by TMD. In addition, it was understood that H-infinity control could reduce the vibration with less power in comparison with the other control methods. Less