水平瞬态荷载下基桩的动力响应分析  

Dynamic response of piles subjected to transient lateral loading

作　　者：龙丽丽[1] 刘东甲[2] 蒋红[1] 

机构地区：[1]安徽水利水电职业技术学院市政工程系,安徽合肥231603 [2]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2012年第7期951-956,共6页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省高等学校优秀青年人才基金资助项目(2012SQRL244);广东省交通厅科技资助项目(2009-02-020);安徽省国土资源厅科研资助项目(2010-g-32)

摘　　要：文章建立了基桩桩顶受到水平瞬态荷载的动力学模型和数学模型;通过Laplace变换解析地求出频率域内桩土系统的传递函数,引入δ矩阵表示传递函数解决了高频部分精度损失的问题,得到了桩顶横向振动速度和位移的频域表达式,再进一步通过快速Fourier逆变换得到时域内速度和位移的表达式;绘制出不同参数下频域内的速度导纳曲线和时域内速度、位移曲线,并分析了曲线的特性以及各参数对曲线的影响。The dynamic and mathematical models of pile heads with transient lateral load are established. An exact transfer function of pile-soil system in frequency domain is derived by the means of Laplace transform. A delta-matrix is built to express the transfer function and decrease the loss of precision of high frequency, and the frequency domain expressions of velocity and displacement of the pile head are obtained. Then the time domain expressions of velocity and displacement are derived by the inverse Fourier transform. The curve of admittance in frequency domain, the curve of velocity and displacement in time domain are analyzed in case of different parameters, and the result indicates that different parameters exert a distinguished influence on the character of curves.

关 键 词：瞬态横向动力响应 传递函数 δ矩阵 导纳曲线 

分 类 号：TU473.16[建筑科学—结构工程]