【摘要】 为了探究某大宽厚比超高层建筑的风致扭转效应及风振控制措施，开展了刚性模型风洞测压试验。对该建筑在不同风向角下的基底力矩系数、风振加速度响应和等效静风荷载进行了研究，分析扭转效应对舒适度指标的影响；针对结构风振加速度较大和平扭振动耦合的特点，采用主被动混合调谐质量阻尼器(ATMD)进行了结构的风振响应控制，并对ATMD控制系统的控制参数确定、地震等极端工况下质量块行程进行了研究。结果表明：大宽厚比建筑基底扭矩系数较大，且扭转向风致效应与沿建筑短边方向风致效应相关性较强，风致扭转效应对结构加速度响应有显著影响；大宽厚比建筑的横风向、扭转向的风荷载计算已超过现行建筑结构荷载规范的适用范围，且不能忽略，需通过风洞试验及风振响应分析确定；ATMD可以同时控制结构的平动和扭转风振响应，提高结构风振舒适度水平。更多还原

【Abstract】 To investigate the wind-induced torsional effect and wind-induced vibration control measures of the super-tall building with a large side ratio, a pressure test on rigid model in the wind tunnel was conducted. Base-moment coefficients, wind-induced acceleration responses and equivalent static wind loads of the building under varying wind directions were studied, and effects of torsion on comfort index were analyzed. Aiming at the large wind vibration acceleration and the coupling of translational vibration and torsional vibration, the active/passive switchable hybrid tuned mass damper(ATMD) was used to control the wind-induced vibration of the structure. The parameters of ATMD and the mass strokel under extreme conditions such as earthquake excitation were studied as well. The results show that the building with a large side ratio has larger base-torque coefficients, the correlation of wind-induced effect between torsion and y-direction(paralleled to building short side) translation is significantly strong. The wind-induced torsional effects have a prominent contribution to acceleration responses. The calculation of lateral and torsional wind loads of the building with large side ratio exceeds the applicable scope in current code and cannot be ignored, thus they have to be determined by wind tunnel test and wind vibration response analysis. ATMD can simultaneously control the translational and torsional vibration responses of the structure induced by wind, and improve the wind vibration comfort of structure.更多还原