Mar 9 @ 11:00 am – 1:00 pm
Dr. Siavash Zamiran, P.E., will be presenting his thesis study, Seismic Earth Pressure and Motion Response of Cantilever Retaining Walls Using Fully Dynamic Analysis, at the Engineering Center located at 4359 Lindell Blvd. in St. Louis on Friday March 9th. Registration is from 11:00 – 11:30 am, with lunch from 11:30 am – 12:00 pm, and the program from 12:00 – 1:00 pm. The cost is $25 for Engineers Club and Affiliate Society Members, $40 for non-members. Reservation limited to 100 people, 1 PDH to be provided. Abstract for the presentation is below: In this study, seismic performance of cantilever retaining walls with cohesive and cohesionless backfills is studied. Different characteristics of the retaining wall including seismic earth pressure and wall deformation are considered for the investigation. The earthquake response of the retaining wall is evaluated using fully dynamic analysis based on finite difference method. The fully dynamic analysis procedure is validated and verified using experimental studies conducted in the literature. To evaluate the earth pressure response of the retaining wall, various parameters including seismic earth thrust, the point of action of seismic earth thrust, and the wall moment are studied. Seismic earth thrust and its point of action are inspected in both the stem and toe sections of the retaining wall. The earth pressure response of the retaining wall based on fully dynamic analysis is compared with current analytical solutions including Mononobe-Okabe method and Seed and Whitman correlation. For the motion response of the retaining wall during an earthquake, relative wall displacements at bottom and top of the wall are investigated. The relative wall displacement acquired from the numerical modeling is evaluated and compared with Newmark sliding block method, and the empirical correlations developed based on Newmark’s methodology. The effects of earthquake acceleration intensity, different earthquake events, and wall backfill strength properties on both earth pressure and motion responses are evaluated. The presented correlations are appropriate for conducting earthquake design on the walls in both earth pressure-based and displacement-based design approaches.
Mar 22 @ 1:00 pm – 2:00 pm
Dr. Gennaro G. Marino, P.E., D.GE will be presenting “Mine Subsidence Engineering: An Overview” at the 2018 West Virginia Construction and Design Exposition on March 22, 2018. His presentation will be from 1:00 – 2:00 pm. This presentation covers key aspects of mine subsidence engineering, a subject that is not well understood, and embraces a number of engineering disciplines. It focuses on the cause of mine subsidence and how mine stability relates to the resulting ground movements. Different mining and geologic conditions determine the mode of failure of the mine. The mode of mine failure in turn affects the resulting subsidence movement. Prediction of subsidence and damage potential are also key aspects of subsidence engineering. Examples of expected subsidence damage as well as mine stabilization will be shown. This presentation will be presented in a manner that will be understandable to anyone that would be interested in learning more about mine subsidence. Edit this post.