Extreme Bridge Loads

Full Session with Abstracts

340050-2 - Repairable Reinforced Concrete Bridge Columns

Friday, April 20
1:30 PM - 5:00 PM
Location: 102

Reinforced concrete (RC) columns are frequently used in bridges. Even though design specifications prevent collapse after severe events, significant damage of columns is expected in high seismic regions. When column longitudinal reinforcement is buckled or fractured, the column repair is difficult and expensive. In this case, affected bridges are usually demolished and totally replaced. A new connection is developed for RC bridge columns with replaceable reinforcement to significantly accelerate the construction, to improve displacement capacity of columns, and to repair RC columns in a few hours after severe earthquakes with minimal costs and no need of special equipment or skilled labor. Furthermore, the total replacement of the affected bridge is prevented with the proposed detailing. If advanced materials such as shape memory alloy reinforcement are used in the joint, columns will be damage-free. The presentation will highlight the findings of analytical and experimental studies on the repairable joint detailing for RC columns.

Mostafa Tazarv

Assistant Professor
South Dakota State University

Dr. Mostafa Tazarv is an assistant professor in the department of Civil and Environmental Engineering at South Dakota State University (SDSU). Prior to joining SDSU in 2015, Dr. Tazarv was a post-doctoral scholar at the University of Nevada, Reno as well as a research associate at Infrastructure Innovation, LLC working on different projects. His research interests include the seismic behavior of concrete structures, advanced materials for civil infrastructure, accelerated bridge construction, large-scale testing, and nonlinear structural analysis. Dr. Tazarv is currently working on different research projects as PI and Co-PI. The total amount of his active research grants as PI and Co-PI is more than $1.2 M. His past research led to the development of a new generation of bridge columns that can be built faster, last longer, perform better in severe events, and cost less in long-term. The first shape memory alloy (SMA) bridge in the world is under construction in Seattle, in which design and construction guidelines for SMA-reinforced columns were based on his study on advanced materials. The unique aspect of this bridge is its continuous functionality after severe earthquakes with minimal post-earthquake damage and repair needs.

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340050-2 - Repairable Reinforced Concrete Bridge Columns



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