Title：Nonlinear response of laterally loaded rigid piles in sand

Reporter：Hongyu Qin  Lecturer in Civil Engineering College of Science and Engineering at Flinders University

Time：8 January 2024 (Monday) 9:30~10:30

Venue：G2-309,Guangzhou International Campus, South China University of Technology

Abstract：

This talk presents nonlinear response of laterally loaded rigid piles in sand. Firstly, the failure mode of laterally loaded piles and the determination of ultimate lateral capacity of short rigid piles are reviewed. Comparison of the measured pile capacity from field tests and predicted using various methods are made. Secondly, elastic solution and elastic-plastic solutions for laterally loaded rigid piles are presented, with the focus on closed-form analytical solutions. The characteristics of the solutions are summarised. Then, they were used to analyse the response of laterally loaded rigid piles in sands obtained from field test, centrifuge test, and 1g laboratory model tests. Typical case studies, such as the PISA project and driven pile tests in heavily overconsolidated dense sand are presented. The determination of the ultimate lateral resistance is discussed. Particularly, CPT-based ultimate lateral pile resistance in sand is evaluated. Furthermore, the analysis of laterally loaded piles driven in low-to-medium density fractured chalk in the ALPACA project is briefly discussed.

Resume:

Dr. Hongyu Qin earned his Bachelor’s in Civil Engineering from Zhengzhou University in 1999, Master in Geotechnical Engineering at Hohai University in 2002 and PhD in Geotechnical Engineering at Griffith University in 2010. After 3 years as a Lecturer at Griffith University, he joined Flinders University in 2015. He leads the teaching and research in Geotechnical Engineering and serves as the Discipline Lead of Civil Engineering for CSE Engineering Honours Masters Thesis and Projects. His research interests principally focus on investigating the behaviour and mechanical properties of geomaterials and their application in predicting the performance of foundations and underground construction projects. He has published more than 30 papers in premier international journal in geotechnical engineering, including Geotechnqiue, Canadian Geotechnical Journal, Acta Geotechnica, Computers and Geotechnics. He collaborates and interacts closely with industry. His research outcomes have been used in the design of foundation systems. The algorithms and solutions that he developed have been licensed to industry partners in the development of an Engineering Calculator APP, which has greatly sped up the calculation tasks and provided more accurate estimation in the performance-based design framework. Testing of the APP in the market shows that the governing bodies are accepting the APP as a form of compliance to the codes.