Short Courses at ISGSR2019
Short Course #1 Risk Assessment in Geotechnical Engineering
D.V. Griffiths, Colorado School of Mines Gordon A. Fenton, Dalhousie University
Update your knowledge of probabilistic methods and reliability-based design methodologies in geotechnical engineering. This short course assumes you have no more than an introductory understanding of probability and statistics, and is designed to present user-friendly training on modern probabilistic techniques for geotechnical engineering applications. The course will include: o Discussion of potential benefits of probabilistic approaches as opposed to classical “Factor of Safety” methods. o Review of sources of uncertainty in geomaterials. o Review of some simple statistical theories needed to develop the methodologies and how to interpret the results of probabilistic analyses. o Relationship between probabilistic methods and LRFD. o Examples of established probabilistic methods in civil engineering such as the First Order Second Moment (FOSM) method, First Order Reliability Method (FORM) and Monte-Carlo Methods (MC). o Introduction to more advanced numerical methods of probabilistic analysis based on the finite element method, such as the Random Finite Element Method (RFEM). o Instructions for downloading software from the instructors’ web sites at no additional cost. Upon completion of this course, participants will know about some of the latest probabilistic methods and reliability-based design methodologies in geotechnical and structural engineering. Click Here to learn more.
Short Course #2 Bayesian method and tools for geotechnical practice
Timo Schweckendiek, Deltares & Delft University of Technology Yu Wang, City University of Hong Kong
Geotechnical engineering deals with large uncertainties compared to other engineering domains. Our estimates of soil and rock properties are typically based on a limited amount of site investigation unlike steel or concrete, which undergo quality control. Hence, it is not surprising that reliability and risk approaches have undergone a rapid development in academe in the last decades, but there are also increasing numbers of applications to practical projects. For example, the safety assessments of flood defenses in the Netherlands will be fully probabilistic from 2017. As infrastructure ages and many structures approach their design life, another rapidly growing issue of concern is the reliability assessment of existing structures. Such assessments call for the use of observations of performance, measurements, and monitoring data to update reliability estimates. In this environment it is also paramount to combine all (often scarce) data from all available sources. This course focuses on basic understanding of Bayesian probability theory and application of Bayesian methods to reliability updating and design, suitable for use in engineering practice. Topics covered include the essentials of Bayesian reasoning; dealing with scarce site investigation data; reliability and survival analysis, including examples on pile foundations and levees; and direct probability‐based design. The hands‐on demonstrations will use widely available and easy‐to‐use simulation‐based tools, complemented by Excel add‐ins which will provided to the course participants. Click Here to learn more.
Short Course #3 Geotechnical reliability-based design examples to improve partial factor design methods
B. K. Low, Nanyang Technological University K. K. Phoon, National University of Singapore
Geotechnical design approach has evolved over the years from the global factor of safety calculation to the recent partial factor design methods like the Load and Resistance Factor Design (LRFD) and the Eurocode 7 (EC7). Yet another design method which can overcome certain limitations and ambiguities of the evolving LRFD and EC7 is reliability-based design (RBD) using the first-order reliability method (FORM). This short course will enable students, academics, professionals, practitioners and researchers to understand the meaning, procedures and merits of RBD-via-FORM (and how it can improve LRFD and EC7). Insightful geotechnical RBD-via-FORM examples in soil and rock engineering are presented, including bearing capacity of spread footing, laterally loaded piles, retaining walls, soil slopes, rock slopes containing discontinuity planes, and tunnels in jointed rock mass. The similarities and differences between RBD-via-FORM and the partial factor design methods (LRFD and EC7), and between RBDvia-FORM and other RBD methods, will be explained. The statistical estimation of soil properties will also be discussed. Click Here to learn more.