摘要
对于某市政道路与地下结构的合建建筑,采用钢弹簧浮置板作为隔振措施。为进一步研究钢弹簧浮置板在合建建筑中汽车荷载作用下的隔振性能,通过ANSYS建立有限元模型进行谐响应分析。研究结果表明:钢弹簧隔振器在10Hz以内振动最大放大50%,11Hz以上起到了隔振作用,在30Hz以上隔振效率达到了70%;隔振后地基反力传递率往低频移动,在15Hz以上频段传递率显著降低;随着弹簧刚度增大,楼板处振动加速度增大、地基反力增大,而随着弹簧阻尼增大楼板处振动加速度降低,地基反力呈现低频减小,中高频增大的规律。
Steel spring floating slab is used as vibration isolation measure in the jointly-built underground structure.In order to further study the vibration isolation performance of steel spring floating slab under vehicle load in jointly-built structure,finite element model was established by ANSYS for harmonic response analysis.The results show that,the spring vibration isolator can amplify the maximum vibration by 50%within 10Hz,play the role of isolation above 11Hz,and the vibration isolation efficiency reaches 70%above 30Hz.After vibration isolation,the transmittance of foundation reaction moves to low frequency and decreases significantly in the frequency band above 15Hz.With the increase of spring stiffness,the vibration acceleration at the floor increases and the foundation reaction increases,while with the increase of spring damping,the vibration acceleration at the floor decreases,and the foundation reaction decreases in low frequency and increases in middle and high frequency.
作者
林延城
徐圣
谷利雄
LIN Yancheng;XU Sheng;GU Lixiong(Huizhou Power Supply Bureau,Guangdong Grid Co.,Ltd.,Huizhou 516000,China;State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,China;China Roads Traffic Science and Technology Group Testing and Measuring Co.,Ltd.,Shijiazhuang 050000,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S01期1099-1104,共6页
Building Structure
基金
国家自然科学基金项目(51878295)
关键词
钢弹簧浮置板
市政道路
地下结构
谐响应分析
合建建筑
steel spring floating slab
municipal roads
underground structure
harmonic response analysis
jointly-built structure
