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高耸柔性结构在风荷载作用下易产生较大的振动加速度和变形,随着其在工程中的广泛应用,对高耸结构进行结构风致振动控制以提高其舒适度显得极其重要。针对某旅游观光塔进行风振响应分析,并以塔中的消防水箱作为调谐质量阻尼器系统(TMD)的惯性质量,进行了TMD风致振动控制设计及其振动控制分析。研究结果表明,所设计的悬挂式TMD控制系统可以有效减小顺风向结构风致响应,从而显著提高观光塔的舒适度,并对结构的基底剪力、倾覆力矩、顶部位移等均有较好的控制效果;同时对观光塔横风向风振进行初步验算,判定其不会发生大幅值的涡激振动现象。
High-rise flexible structure is easy to generate large vibration acceleration and deformation under the wind load. With its wide application in engineering, it is very important to control wind-induced vibration of tall structure to improve its comfort. According to the analysis of wind-induced vibration response of a tourism tower and the tower’s fire-fighting water tank as the inertial mass of the tuned mass damper system (TMD), the wind-induced vibration control design and its vibration control analysis are carried out. The results show that the designed suspension TMD control system can effectively reduce the wind-induced response of the downwind structure, thereby significantly improving the comfort of the tower and having better results on the base shear force, overturning moment and top displacement of the structure Control effect; at the same time on the tower cross wind wind vibration preliminary checking to determine it will not happen large amplitude vortex induced vibration phenomenon.