论文部分内容阅读
在台风“杜鹃”登陆期间,对温州市某高层建筑进行了现场实测,得到了建筑物的风场和加速度响应等数据。进而对实测结构进行了模态参数识别,得到了其固有频率、振型和阻尼比。对结构加速度响应信号进行了去噪处理,经过信号处理后的响应数据满足高斯分布,进而通过积分得到高层建筑的速度和位移响应。同时,运用等效原理建立了该高层建筑结构的5质点简化弯剪模型,使简化结构的动力特性和原结构相似。再应用简化模型反演出结构受到的脉动风荷载时程。将反演得到的脉动风荷载时程叠加上平均风荷载得到各测点风荷载时程,再作用到简化模型上运用Newmark-β法进行风致响应分析,计算得到的加速度响应与实测加速度响应较为吻合。
During the typhoon “Azalea” landing, an on-site survey was conducted on a high-rise building in Wenzhou City, and the wind field and acceleration response of the building were obtained. Then the modal parameters of the measured structure are identified, and its natural frequency, mode shape and damping ratio are obtained. The structure acceleration response signal is denoised, the signal processing response data to meet the Gaussian distribution, and then through the integral high-rise building speed and displacement response. At the same time, using the equivalent principle, a 5-point simplified bending shear model of the high-rise building structure is established, which makes the dynamic characteristics of the simplified structure similar to the original structure. Then the simplified model is applied to inverse the wind load history of the structure. The time series of the fluctuating wind loads obtained from the inversion were superimposed with the average wind loads to obtain the wind load time histories at each measuring point, and then applied to the simplified model to perform the wind-induced response analysis using the Newmark-β method. The calculated response of the acceleration response to the measured acceleration was Anastomosis.