Tests were conducted on a 6-storey office building and factory building near where abnormal horizontal vibrations often occurred. The floor acceleration responses of the building were measured under the condition of crane operation, which was believed to be one of the sources of the vibration. A one-third octave spectrum and weighted acceleration levels were calculated from the measured floor acceleration time histories to assess human comfort levels. The modal parameters of the building were identified using the frequency domain decomposition method. The field test results indicated that the small crane's excitation frequency during the start and stop operations in the nearby factory was 3.6 Hz, which was the same as the fundamental natural frequency of the building. The resonance phenomenon between the building structure and the crane excitation caused the abnormal horizontal vibration. Finally, the influence of adjusting the excitation frequency, the excitation intensity, and the connection form of the foundation slab on the vibration responses was analyzed. Results showed that when the excitation frequency was adjusted to stagger the natural frequency of the structure by 20%, the acceleration level resulting from the same excitation could be reduced by half. The excitation intensity, the difference between the frequencies of excitation and structure was found to be the key factor influencing the structural resonance response.

测试在附近经常发生异常水平振动的6层办公楼和厂房进行。建筑物的地板加速度响应是在起重机运行的条件下测量的，这被认为是振动的来源之一。三分之一倍频程谱和加权加速度水平从测量的地板加速度时间历史中计算出来，以评估人类的舒适度。使用频域分解方法识别建筑物的模态参数。现场试验结果表明，小型起重机的附近工厂启动和停止运行时的励磁频率为 3.6 Hz，与建筑物的基本固有频率相同。建筑结构与起重机激振之间的共振现象导致水平振动异常。最后分析了调整激励频率、激励强度和基础板连接形式对振动响应的影响。结果表明，当调整激励频率使结构的固有频率错开20%时，相同激励产生的加速度水平可降低一半。发现激发强度、激发频率与结构之间的差异是影响结构共振响应的关键因素。