基于MTA的浅部缺陷端承桩的频谱特性分析
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摘要
低应变反射波法已广泛应用于桩基质量评价,为了克服单纯依靠弹性波波动学特性来分析浅层缺陷端承桩的局限,从振动测试与分析的角度,引入模态试验分析理论(MTA),建立了浅部各种缺陷端承桩的频率域响应理论模型,分析了浅部各种缺陷端承桩在桩头激励下的模态响应特征和规律,为工程桩检测和缺陷判断提供理论依据.
Low strain reflected wave method was widely used in the pile foundation quality evaluation.In order to overcome the limitations of analysis of shallow defect end-bearing piles rely on the characteristics of the elastic wave.From the angle of the vibration test and analysis,the modal testing theory(MTA) was introducted, the frequency domain response theory model was built,that of various shallow End-bearing piles,the characteristics and laws of modal response were analysised in the piles head motivate,the theoretical basis was provided that of piles testing and defect judgment
Low strain reflected wave method was widely used in the pile foundation quality evaluation.In order to overcome the limitations of analysis of shallow defect end-bearing piles rely on the characteristics of the elastic wave.From the angle of the vibration test and analysis,the modal testing theory(MTA) was introducted, the frequency domain response theory model was built,that of various shallow End-bearing piles,the characteristics and laws of modal response were analysised in the piles head motivate,the theoretical basis was provided that of piles testing and defect judgment
引文
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[2]Hermans L,Vander A H.Modal testing and analysis of structures under operational coditions:industrial applications[M].Belgium: Mechanical Systems and Signal Processing,2002.
[3]李德葆,陆秋海.实验模态分析及其应用[M].北京:科学出版社,2001. Li D B,Lu Q H.Experimental modal analysis and application[M]. Beijing:Science Press,2001.
[4]傅志芳,华宏星.模态分析理论与应用[M].上海:上海交通大学出版社,2000. Fu Z F,Hua H X.Modal analysis theory and applications[M]. Shanghai:Shanghai Jiao Tong University Press,2000.
[5]王文静,刘志明.基于实验模态的结构应变模态分析[J].北方交通大学学报,2000,24(4):20-23. Wang W J,Liu Z M.The strain modal analysis of structure based on modal testing[J].Journal of Northern Jiaotong University,2000,24 (4):20-23.
[6]李中付,华宏星.非稳态环境激励下线性结构的模态参数辨识[J].振动工程学报,2002,15(2):139-143. Li Z F,Hua H X.Modal parameters identification of linear structures undergoing non-stationary ambient excitation[J]. Journal of Vibration Engineering,2002,15(2):139-143.
[7]刘长来,潘纪顺.基桩浅部严重缺陷的本构模型与检测实例[C]//中国工程地球物理检测技术.北京:地震出版社,2001. Liu C L,Pan J S.Constitutive model and detect instances of serious defects shallow piles[C]//China Engineering geophysical detection technology.Beijing:Earthquake Press,2001.
[8]吴庆曾.论基桩完整性检测技术[J].物探与化探,2000,24(4): 284-294. Wu Q Z.The technique for inspection of the perfection of the foundation piles[J].Geophysical And Geochemical Exploration, 2000,24(4):284-294.
[9]卢巧媛,黄国祥.桩基无损检测振动波全波振相识别[J].工程勘察,1992,45(4):64-67. Lu Q Y,Huang G X.To discriminate the full wave vibrating phase of vibrating wave in nondestructive detection of piling foundation [J].Geotechnical Investigation & Surveying,1992,45(4):64 -67.
[10]陈凡.基桩高应变动力检测规程(JGJ106-97)[S].北京:中国建筑工业出版社,1997. Chen F.Foundation piles high strain dynamic testing[S].Beijing: China Building Industry Press,1997.
[11]中国建筑科学研究院.建筑桩基技术规范(JGJ94-2008)[S].北京:建筑科技,2012 China Academy of Building Research.Technical code for building pile foundation(JGJ94-2008)[S].Beijing:Construction Science and Technology,2012.
[12]徐丽,易伟建.结构局部损伤诊断的应变模态方法分析与应用[J].自然灾害学报,2006,15(3):157-163. Xu Li,Yi W J.Strain mode method for diagnosis of local damage of structure:analysis and application[J].Journal of Natural Disasters, 2006,15(3):157-163.
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