摘要
采用激振法和衰减测试对碎石桩复合地基块体振动响应进行现场试验,分析了该复合地基在不同激振方式下的振动反应规律,提出了碎石桩复合地基抗压、抗弯、抗剪刚度系数线性关系。同时通过试验对比,分析了自由振动与强迫振动两种测试方法对于碎石桩复合地基测试结果的适宜性,这对复合地基的理论研究及动力基础的天然地基的设计、试验和研究都具有实际意义。
The responses of composite foundation and gravel pile were tested in situ by the method of vibration and by the measurement of damping of wave. Responses of composite foundation was studied and analyzed at various cases of forced vibration. The results show that stiffness coefficients for the compression is proportional to stiffness coefficients of bending and shearing. At the same time, the stiffness coefficient of beading is proportional to the stiffness coefficients of shearing. Two results of composite foundation and gravel pile by two measurement methods of free vibration and forced vibration were compared.
出处
《地震工程与工程振动》
CSCD
北大核心
2005年第5期132-136,共5页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(40372122)
关键词
碎石桩复合地基
自由振动
强迫振动
地基动刚度
composite foundation and gravel pile
free vibration
forced vibration
dynamic stiffness of foundation
