Events

Civil and Environmental Engineering MS Thesis Defense: Jonathan Nasr
Tuesday, August 15, 2017 - 2:00pm

The Department of Civil and Environmental Engineering is pleased to announce Jonathan Nasr's MS Thesis Defense: "Development of a Design Guideline for Bridge Pile Foundations Subjected to Liquefaction-Induced Lateral Spreading." 

Date: Tuesday, August 15, 2017
Time: 2:00pm
Location: Engineering Building 202L (CEE Conference Room)
Adviser: Dr. Arash Khosravifar

Effective-stress nonlinear dynamic analyses (NDA) were performed for piles in liquefiable sloped ground to assess how inertia and liquefaction-induced lateral spreading combine in long-duration vs. short-duration motions. A parametric study was performed using input motions from subduction and crustal earthquakes covering a wide range of motion durations. The NDA results showed that the pile demands increased due to liquefaction-induced lateral spreading compared to nonliquefied conditions. The NDA results were used to evaluate the accuracy of the equivalent static analysis (ESA) recommended by Caltrans/ODOT for estimating pile demands. Finally, the NDA results were used to develop new ESA methods to combine inertial and lateral spreading loads for estimating pile demands.