交通振源对砖混结构住宅影响的减振方法研究

Vibration reduction method study of influence of transportation vibration sources on masonry concrete structure residence

砖混结构住宅因基础浅,容易受到周边交通振源影响,且沿房屋高度有振动放大效应,对居民生活产生干扰。而减小房屋水平横向振动是当前的难点之一。实地测试并总结6栋房屋的振动放大规律,与《建筑工程容许振动标准》(GB 50868—2013)中有关住宅舒适性振级限值进行比较,进而针对其中1栋房屋进行分析,并提出相应的减振目标。进一步研究了房屋下设虚拟层的结构动力特性,发现其有限元模型的振动响应更符合实际情况。通过数值计算比较加固上部结构横墙前后的减振效果,为解决类似的振动问题提供有效途径。

Due to shallow foundation, masonry concrete structure residence is vulnerable to surrounding transportation vibration sources. And vibration amplification effect of the building along the height interferes the residents＇ living. The horizontal lateral vibration reduction is one of the current difficulties. The vibration amplification laws of six buildings were measured in field and summarized, and the results were compared with the residence comfort vibration level limit in Standard for allowable vibration of building engineering （GB 50868--2013）. Then one residence was analyzed, and the corresponding vibration reduction target was proposed. The structural dynamic characteristics of the virtual layer set under the building were further researched. The results show that the vibration response of the finite element model is accorded with the actual situation to a greater extent. By numerical calculation, the vibration reduction effects of the building before and after the strengthening of cross walls in upper structure were compared, and the effective way was provided to solve the similar vibration problem.