轨道交通引起的周边建筑物振动研究

 交通荷载引起的环境振动评价问题，国内外学者已进行了大量的研究，但主要集中在交通荷载所引起的地面振动问题上，对周边建筑物振动问题研究的较少。根据作者和其他研究者所获得的实测结果，完善了前人研究的不足之处，并对轨道交通引起的周边建筑物室内振动环境的评价方法提出了建议。讨论了房屋结构自振频率、楼层高度的变化对房屋结构各楼层振动的影响。通过有限元法分析轨道交通引起建筑物的振动并与实测结果进行对比，合理地解释了实测中观测到的一些现象, 指出由于入射波与反射波的相互叠加，导致了高层建筑物的最大振动响应可能发生在建筑物的某一中间层(与结构形式有关)，并且在建筑物前，由于反射波的影响，地面振动存在着一个放大区域。

Study on Building Vibration Caused by Rail Transit

Many investigations have been carried out by many researchers in order to evaluate the effect of traffic caused vibration on environment. However, they mainly focused on traffic-caused ground vibration, few of them aimed at building vibration. Based on field measurement results acquired by authors and others, the study on evaluation method of vibration in the room of residential buildings was carried out and some deficiencies of previous researches were pointed out. Then, the building vibration caused by rail transit was analyzed by employing FEM. The effects of building natural frequency and building height on the vibration of each floor were discussed. Comparing numerical results with measurement results, some phenomenon observed in field measurement were explained reasonably, and it can also be concluded that the maximum vibration response may occur on a certain middle floor and the enlarged vibration region may exist in front of a building due to the mutual superimpose of the incident and reflected waves.