Civil and Environmental Engineering Department Seminar: Towards Resilient Seismic Systems and Improved Assessment of Existing Structures

Seminar | March 3 | 12-1 p.m. | 542 Davis Hall

 Matthew DeJong

 Civil and Environmental Engineering (CEE)

This talk will highlight two research themes. In the field of earthquake engineering, understanding the rocking of structures is both essential for the assessment of existing structures and promising for the design of novel seismic systems. Regarding assessment, the seismic collapse of masonry structures will first be considered, and a new framework which aims to significantly improve code-based procedures for assessment of collapse will be presented. Regarding design, more stringent seismic performance objectives are inspiring new design methods which aim to reduce or locate damage, even for large earthquakes. One such method, which uses rocking to isolate the structure from the ground motion, will be considered. In particular, the dynamics of flexible rocking structures, and new experiments on their interaction with soil, will be presented.
In the field of civil infrastructure, both the degradation of aging structures and the effects of new construction on existing structures are of global concern, particularly with increasing urbanization. Within this second research theme, this talk will focus on: 1) new centrifuge testing and computational modeling results that improve understanding of the response of existing surface structures to tunneling, and 2) new monitoring results that quantify the behavior of severely damaged rail bridges. The combination of improved modeling and monitoring is essential to improve maintenance and mitigation procedures related to major civil infrastructure assets.