摘要
对南京市地铁1号线车库段上部待建住宅楼进行研究,探讨地铁上盖建筑受地铁出入库振动的影响。通过现场测试与数值模拟,预测不同工况下待建建筑的振动响应以及室内振动加速度限值范围。模拟结果表明,采用底部加速度法将所测轨道、混凝土柱的振动输入计算模型中,可以获得待建建筑三向位移变化,并进行结构易损部位及预警分析,判断建筑安全性。通过模拟8种工况,计算得到1~80 Hz频率范围内各建筑楼板1/3倍频程中心频率下的加速度响应有效值和加速度振级,获取了住宅舒适度影响较大区域的具体坐标。研究成果对结构减振及舒适度提升具有参考意义。
A residential building under construction on top of a garage section of an underground metro line one in Nanjing is taken as the research object,exploring the impact of vibration from the metro entering and exiting the garage on the overlying building.Through field testing and numerical simulation,the vibration response of the under-construction building under different working conditions and the limit range of indoor vibration acceleration are predicted.The simulation results show that by using the bottom acceleration method to input the vibration of the measured track and concrete columns into the computational model,the three-directional displacement changes of the under-construction building can be obtained,and the structural vulnerable locations and early warning analysis can be conducted to determine the building’s safety.Through simulating eight working conditions,the acceleration response effective values and acceleration levels at the center frequencies of one-third octave bands within the frequency range of 1~80 Hz for each building floor are calculated,obtaining the specific coordinates of areas with significant impact on residential comfort.The research results have reference significance for structural damping and improving comfort.
作者
魏晓斌
郭建祥
孙正华
WEI Xiaobin;GUO Jianxiang;SUN Zhenghua(Jiangsu Testing Center for Quality of Construction Engineering Co.,Ltd.,Nanjing 210033,China;Architecture Science and Technology Research Institute Co.,Ltd.,Nanjing 210008,China)
出处
《科技和产业》
2024年第3期255-262,共8页
Science Technology and Industry
基金
住房和城乡建设部项目(K20221278)
“十四五”国家重点研发计划项目(2021YFF0602000)。
关键词
地铁
振动响应
数值模拟
建筑结构
舒适度
底部加速度法
metro
vibration response
numerical simulation
building structure
degree of comfort
bottom acceleration
