瑞利波作用下桩土相互作用横向动力响应计算研究  

Computational Research on the Horizontal Dynamic Response of Single-pile Considering Pile-soil Interaction During Passage of Rayleigh Waves

作　　者：王海东[1,2] 尚守平[1] 周志锦[1] 周方圆[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]湖南大学建筑安全与节能教育部重点实验室,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2009年第11期1-5,共5页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50808078);高等学校博士点基金资助项目(20070532090);湖南省自然科学基金资助项目(08JJ4016);湖南省科技计划重点资助项目(06SK4057)

摘　　要：将采用Novak薄层法计算地基土动力阻抗的方法引入到瑞利波作用下桩土横向动力响应分析中,得到了单桩横向动力响应的计算公式.在此计算公式的基础上分析了长径比、桩土刚度比、地基土的泊松比对单桩横向响应的影响.结果显示,泊松比的变化对单桩水平动力响应有影响,桩土刚度比对单桩水平动力响应有较大影响,而桩长对桩底自由的单桩动力响应基本无影响.而且单桩水平动力响应随着频率的增大而减小.On the basis of the research of simple analytical computation on the horizontal dynamic response of single-pile during the passage of Rayleigh waves, Novak layer method which applies the computation of the dynamic impedance of soil was introduced to analyze horizontal dynamic pile-soil interaction. The simple analytical computation on the horizontal dynamic impedance of single-pile was investigated, and the computing formula of the horizontal dynamic response of the displacement was put forward. Based on the computing formula, it has been found that the horizontal dynamic response is affected by Poisson＇s ratio. The horizontal dynamic response of the displacement of single-pile will decrease when the frequency improves. And the stiffness ratio of the pile to the soil has more effect on the horizontal dynamic response of single-pile, but the effect of pile length shows an opposite trend.

关 键 词：动力响应 瑞利波 桩土相互作用 Novak薄层法 

分 类 号：TU31[建筑科学—结构工程]