Development of dynamic p-y backbone curves for a single pile in dense sand by 1g shaking table tests

• Published in: KSCE journal of civil engineering Vol. 15; no. 5; pp. 813 - 821
• Main Authors: Yang, Eui-Kyu, Choi, Jung-In, Kwon, Sun-Yong, Kim, Myoung-Mo
• Format: Journal Article
• Language: English
• Published: Heidelberg Korean Society of Civil Engineers 01.05.2011; Springer Nature B.V; 대한토목학회
• Subjects: Acceleration; Backbone; Civil Engineering; Connecting; Dynamic tests; Dynamics; Empirical equations; Engineering; Equations; Geotechnical Engineering & Applied Earth Sciences; Hyperbolic functions; Industrial Pollution Prevention; Pile tests; Piles; Sand; Shake table tests; Soil; Soil (material); Soil resistance; Soils; Stiffness; 토목공학; ultimate soil resistance; 1g shaking table tests; pseudo static analysis; dynamic p-y backbone curve; initial soil stiffness
• ISSN: 1226-7988; 1976-3808
• DOI: 10.1007/s12205-011-1113-0

A series of 1 g shaking table model pile tests were carried out in dry and saturated dense sand to evaluate dynamic p-y curves for various conditions of the acceleration frequency, the acceleration amplitude of input loads, the flexural stiffness of the pile shaft and the mass at the pile head. The influence of each parameter on dynamic p-y curves was evaluated. Dynamic p-y backbone curves for pseudo static analysis of dense sand were proposed as hyperbolic functions by connecting the peak points of the experimental p-y curves, which correspond maximum soil resistances. In order to express the backbone curves as hyperbolic functions, empirical equations for the initial soil stiffness ( k ini ) and the ultimate soil resistance ( p u ) were developed, respectively, as a function of the soil friction angle and the confining stress. The herein suggested backbone curves were also compared with the currently available p-y curves.