A new analytical model to study the influence of weld on the vertical dynamic response of prestressed pipe pile. (3rd February 2017)

• Record Type: Journal Article
• Authors: Wu, Wenbing; Jiang, Guosheng; Huang, Shenggen; Mei, Guoxiong; Leo, Chin Jian
• Is Part Of: International journal for numerical and analytical methods in geomechanics. Volume 41:Number 10(2017)
• Page Start: 1247
• Page End: 1266
• Publication Date: 2017-02-03
• Subjects: pile vibration -- prestressed pipe pile -- weld -- soil plug effect -- additional mass model -- Laplace transform; Soil mechanics -- Mathematics -- Periodicals; Rock mechanics -- Mathematics -- Periodicals; 624.1510151
• DOI: 10.1002/nag.2670
• Languages: English
• ISSNs: 0363-9061

Abstract

Summary: This investigation is concerned with the mathematical analysis of a viscoelastic prestressed pipe pile embedded in multilayered soil under vertical dynamic excitation. The pile surrounding soil is governed by the plane strain model, and the soil plug is assumed to be an additional mass connected to the pipe pile shaft by applying the distributed Voigt model. Meanwhile, the prestressed pipe pile is assumed to be a vertical, viscoelastic, and hollow cylinder governed by the one‐dimensional wave equation. Then, analytical solutions of the dynamic response of the pipe pile in the frequency domain are derived by means of the Laplace transform and impedance function transfer method. Subsequently, the corresponding quasi‐analytical solution in the time domain for the case of the prestressed pipe pile undergoing a vertical semi‐sinusoidal exciting force applied at the pile top is obtained by employing the inverse Fourier transform. Utilizing these solutions, selected results for the velocity admittance curve and the reflected wave curve are presented for different heights of the soil plug to examine the influence of weld properties on the vertical dynamic response of prestressed pipe pile. The reasonableness of the theoretical model is verified by comparing the calculated results based on the presented solutions with measured results. Copyright © 2017 John Wiley & Sons, Ltd.