摘要
老旧小区中房屋产生振动影响正常使用的现象近期日益增多。这些房屋一般为6~7层砖混结构,属于多层住宅。本文基于某典型小区房屋振动现象,根据地质和房屋资料,采用经验公式法对小区房屋自振频率进行估算,结合现场微振测试结果,确定由大型车辆经过或是车站车辆制动及启动引起的振动,其频率较低,与房屋的自振频率相近,是引发房屋振动的主要原因。结合此类小区自身特点,对常用减振方法的实用性逐一进行分析,选择打钻孔灌注排桩的方式作为房屋的减振措施,并提出初步设计方案。
Recently,vibration in buildings in old residential districts has been increasing.These buildings are brick-concrete structures,and are multi-story residences,generally with 6 ~ 7floors.In this study,the natural frequency of buildings in a district is empirically estimated.Combining with the in-situ test results,the vibration caused by heavy vehicle traffic or braking and starting of vehicles at bus station,whose frequency is close to the natural frequency of buildings in the district,is the main reason of vibration in buildings.Considering the characteristics of the study district,popular methods to reduce the vibration here are analyzed to obtain the most suitable method for the district.Cast-in-place bored piles in rows are selected for this district and a preliminary solution for vibration reduction is presented.
出处
《地震工程学报》
CSCD
北大核心
2015年第1期126-130,共5页
China Earthquake Engineering Journal
基金
国家自然科学基金项目(51378463)
国家自然科学基金高速铁路基础研究联合基金重点支持项目(U1234204)
关键词
砖混结构
自振频率
减振措施
钻孔灌注排桩
brick-concrete structure
natural vibration frequency
vibration reduction measure
cast-in-place bored pile
作者简介
黄博（1989-），男，博士研究生，主要从事土动力学方面的研究．E—mail：hbzjdx@zju．edu．cn
