多层住宅环境振动影响测试与减振措施分析  

Ambient Vibration Test for a Multi-story Residential Building and the Vibration Mitigation Measures

作　　者：朱斌[1,2] 陈龙珠[1] 丁力[2] 

机构地区：[1]上海交通大学土木工程系安全与防灾工程研究所,上海200240 [2]上海市建筑科学研究院上海市工程结构新技术重点实验室,上海200032

出　　处：《地震工程学报》2014年第2期207-213,共7页China Earthquake Engineering Journal

基　　金：上海市科委资助项目部分研究成果(11dz1202000)

摘　　要：上海深厚软土地区某6层砖混住宅房屋经常受到间歇性的振动干扰，其中5～6层尤为明显。本文通过现场振动测试确认了振源为距房屋北侧约80m远处道路上通过的重型车辆。分析了房屋的环境振动特征和幅值，将其与新近实施的国标《建筑工程容许振动标准》（GB50868—2013）中有关住宅舒适性振级限值进行了比较；对影响舒适度最为严重的住宅结构水平横向振动用有限元软件建模，对结构环境振动响应起主要作用的第1阶自振频率和振型，由下设虚拟层来考察地基土的影响；最后根据该住宅环境振动的特性，分析了减振目标和可供进一步计算优化的两种减振技术措施。本文的实测与分析方法对解决类似的工程问题具有实用参考价值。Brick-concrete buildings have been extensively used in urban and rural areas. However, this type of building, which frequently contains a shallow foundation, demonstrates poor struc- tural integrity and is susceptible to influence from ambient vibrations. This case is especially valid for buildings that were constructed in previous eras. With the development of modern cities and the increasing demand for an enhanced quality of life, environmental interference caused by ambi- ent vibrations has become a critical issue. In areas with soft soil, traffic is a primary source of ambient vibrations. Vehicle vibrations caused by road surface roughness or speed changes can cause vibrations throughout the foundation of a building. Therefore, the vibration of brick-con- crete buildings is related not only to the excitation source of the vibration but also the soil charac- teristics, the foundation conditions, and the structural style. The human response to the vibrations of housing structures is closely correlated with a person＇s cognitive level and their current physical and psychological conditions. Thus, the potential difference in the reactions among building occupants is significant. Residents in a six-story brick-concrete building, which is located in an area of Shanghai with soft ground, frequently complained about the intermittent interference from vibrations, particularly residents on the upper two stories. The measures confirmed that the environmental vibra- tions were generated by heavy vehicles traveling on a road that was located approximately 80 m north of the building. The frequency and amplitude characteristics of the ambient vibrations and the human comfort levels for the different stories of the building were analyzed according to the ＂ standard for allowable vibration of building engineering＂ {GB50868--2013）. To comprehensively evaluate the impact induced by the transversely horizontal vibrations, which influences human comfort levels for the three components of building vibration, a numerical fin

关 键 词：多层住宅 环境振动测试 舒适度评估 减振措施 

分 类 号：TU311.3[建筑科学—结构工程]