The responses of load test on Aluminum pile in saturated sand

• Main Authors: Wei-Lun Tai, 戴偉倫
• Other Authors: 陳正興
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/70181102524950621834

碩士 === 臺灣大學 === 土木工程學研究所 === 98 === To investigate the behavior of a laterally loaded pile, a series of model pile tests were conducted at the National Center for Research on Earthquake Engineering (NCREE). An aluminum model pile in a box without and with soils was tested. Tests with the pile only were performed to determine the pile’s flexural rigidity while tests with the pile in saturated sands were conducted to record the pile-head load-deflection responses and the curvatures along the pile shaft. To analyze the test data of this model test, the moment distributions of the pile were firstly computed by multiplying the curvatures with the flexural rigidity. Then, an optimization method with Lagrange multipliers was adopted to fit the moment curves to polynomials. Afterward, the displacement, slope and shear of the pile, as well as the soil reactions can be obtained through integration and differentiation of the moment function. Besides, the p-y curves can be thus constructed by relating the soil reactions to the displacements of the pile. To understand the characteristics of the experimental p-y curves obtained, the initial subgrade modulus and the secant subgrade reaction modulus of the p-y curves were investigated. Simple empirical equations were further proposed to simplify the experimental p-y curves. Finally, numerical analyses with the experimental p-y curves were performed by SAP2000 for verification and give satisfactory results.