车辆行驶振动对古长城影响分析及评价
Impact Analysis and Evaluation of Vehicle-driving-induced Vibration on the Ancient Great Wall

交通振动会对周边古建筑产生不利影响，研究振动规律对古建筑的稳定性评价非常重要。为此，利用振动探测仪采集古长城因周边道路车辆行驶引起的振动数据。通过解译振动波形了解场地的振动强度衰减过程及大小，确定振动强度及对长城的影响，以及各因素与振动强度的关系。以国家古建筑允许振动规范对波形解译结果进行评价，为解决此类文明遗址的保护问题提供了技术支撑。分析结果表明：不同路况，振动衰减规律不同，路况较好振动强度衰减迅速；行驶车辆的车速、荷载及行驶道路质量均可影响长城水平振动强度，车速越快、荷载越大、道路质量越差，长城水平振动强度越大；长城不同位置对车辆行驶产生的振动响应不同，长城脚水平振动强度大于长城顶水平振动强度。
Traffic vibration has a negative impact on adjacent ancient buildings, so it is very important to determine the vibration rule when evaluating the stability of ancient architecture. In this paper, we used a vibration detector to obtain vibration data induced by vehicles driving around the ancient Great Wall. By interpreting the vibration waveforms, we determined the influence of vibration intensity on the Great Wall and the relation between various factors and vibration intensity. To evaluate the waveform results, we used the national standard for the allowable vibration in ancient buildings, which provides technical guidelines for the protection of historically valuable sites. The results indicate that the vibration attenuation law is different under different road conditions, and that vibration strength decays rapidly under good road conditions. The speed and load of driving vehicles and road quality can affect the horizontal vibration strength of the Great Wall, that is, the higher the speed, the greater the load, the worse the road quality, and the greater the horizontal vibration strength of the Great Wall. Different positions along the Great Wall respond differently to vehicle driving vibration and the horizontal vibration strength at the foot of the Great Wall is greater than that at the top