某体育馆楼板振动舒适度研究

Study on Comfortableness of a Gymnasium under the Condition of Floor Vibration

针对某大学体育馆楼板振动舒适度问题,建立楼板计算模型,计算楼板在不同边界等条件下的自振频率。现场实测楼板自振频率和最不利情况时楼板振动加速度值。楼板自振频率的计算值和四边固定且无活荷载时的实测吻合较好,表明数值计算模型是合理的。基于实测加速度值,利用国际标准ISO 2631-1997对楼板振动舒适度进行评价,评价结果表明楼板满足舒适度要求。所采用的基于国际标准的评价方法可供国内其他工程结构楼板舒适度的评价提供参考。

With the development of large-span, lighter and more flexible modern structures, much attention has been paid to the issues of structure vibration and structural comfortableness in vibration environment caused by human activities. Yet there is hardly a unified standard available for evaluation of the structural comfortableness. The issue of the structural comfortableness of a gymnasium under the condition of floor vibration is discussed in the paper. The computation model of a finite large floor is established and its natural frequencies under different boundary conditions and loading conditions are calculated. The natural frequencies and vibration accelerations of the floor under the most unfavorable conditions are measured. The computation result of floor＇s natural frequencies is in consistent with that of site measurement. Thus, the rationality of the numerical calculation model is verified. Based on the measured acceleration values, comfortableness in the floor vibration environment is evaluated by using the international standard ISO 2631-1997. The evaluation results show that the floor can satisfy the demand of comfort. The method for comfortableness evaluation used in this paper can provide a reference for other engineering structures.