基桩承载力动态测试的最小激振能量数值分析
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摘要
本文采用一维单自由度模式分析系统最小激振力,基于一维杆件振动模式理论,导出桩土系统的一阶与二阶振动频率,从而得出桩基位移与激振力的公式。通过工程实践和有限元数值分析,论证了该方法在小桩承载力动态测试中的可行性,对工程应用有一定的指导作用。
This paper analyzes minimum exciting force of a tested pile using one dimensional single degree of freedom mode. Based on one-dimensional rod vibration theory,the first and the second order vibrating frequencies of the soil-pile system are derived. The function relation between the dynamic displacement of the pile head and the minimum exciting force of the soil-pile system is given out. It is validated that the method in the dynamic bearing capacity testing of small pile is cor- rect using the practice of engineering and finite element analysis,and the method will be significant for engineering practica- bility.
This paper analyzes minimum exciting force of a tested pile using one dimensional single degree of freedom mode. Based on one-dimensional rod vibration theory,the first and the second order vibrating frequencies of the soil-pile system are derived. The function relation between the dynamic displacement of the pile head and the minimum exciting force of the soil-pile system is given out. It is validated that the method in the dynamic bearing capacity testing of small pile is cor- rect using the practice of engineering and finite element analysis,and the method will be significant for engineering practica- bility.
引文
[1]徐攸在,桩的动测新技术[M],北京:中国建筑工业出版社,2002.3.
[2]黄龙生、黄勇等,桩动力检验的理论与适用方法[M],北京:地震出版社,2004.3.
[3]戴诗亮,随即振动实验技术[M],北京:清华大学出版社,1984
[4]肖仁城、赵锡红,基桩承载力动态测试的最小激振能量研究[J],振动与冲击,2006.3.
[5]王金昌、陈页开,ABAQUS在土木工程中的应用[M],杭州:浙江大学出版社,2006.11.
[2]黄龙生、黄勇等,桩动力检验的理论与适用方法[M],北京:地震出版社,2004.3.
[3]戴诗亮,随即振动实验技术[M],北京:清华大学出版社,1984
[4]肖仁城、赵锡红,基桩承载力动态测试的最小激振能量研究[J],振动与冲击,2006.3.
[5]王金昌、陈页开,ABAQUS在土木工程中的应用[M],杭州:浙江大学出版社,2006.11.