路面交通诱发古建筑振动测试与分析

对某古建筑在路面交通作用下的振动响应进行了现场实测和数值模拟。首先对结构振动速度与加速度响应进行了现场实测,然后计算了结构模型在实测数据输入下的振动响应,最后分析了交通路况对古建筑的影响。分析结果表明:路面交通引起古建筑水平向振动主要在3~15Hz范围内,以低频振动为主;竖向振动第一阶频率约为8Hz,振动竖向幅值较水平幅值大;结构的一阶频率与车辆振动频率接近是导致古建筑振动幅值较大的原因。

The field measurement and numerical simulation of the vibration response of an ancient building under the action of road traffic are carried out.First,the vibration velocity and acceleration response of the structure are measured on the spot;then the vibration response of the structure model under the measured data input is calculated;finally,the influence of the traffic conditions on the ancient buildings is analyzed.The results show that the horizontal vibration of ancient buildings caused by road traffic is mainly within the range of 3?15 Hz,the low frequency vibration is dominant,the first order frequency of vertical vibration is about 8 Hz,and the vertical amplitude of vibration is larger than that of horizontal vibration.The first order frequency of the structure is close to the vibration frequency of the vehicle,which is the reason for the larger vibration amplitude of the ancient building.