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Emily Kunkel on Green Hydrogen & Energy Transition in USA TodayApril 28, 2026
Emily Kunkel discusses green hydrogen’s potential to support cleaner energy, industrial decarbonization and long-duration energy storage in USA Today’s “Hy-Powered.”
Insight
Analytical Approaches for Investigating the Cause of the I-35 West Bridge FailureApril 16, 2013
The I-35 West Bridge in Minneapolis Minnesota collapsed on August 1st, 2007 at 6:04 pm killing 13 people and injuring many more. A nearby security camera captured a video of the collapse. In order to determine the cause of the collapse, a set of analysis results using finite element models and hand calculations were combined into one non-linear model to simulate what occurred on the day of collapse. The collapse model contains the non-linear material properties, loading scenario and findings from the inspection history of the bridge.
Insight
Forensic Investigation Modeling: A New Forensic ToolJanuary 01, 2013
The investigation into the causes of the collapse in Minneapolis in August 2007 of the I-35W bridge required sifting through a vast amount of design, retroft, and maintenance data prior to initiating the complicated work of analyzing the condition and loading of the bridge at the time of collapse. A new forensic tool—forensic information modeling—was created to store all of these data, as well as the geometry, as a three-dimensional visual database, enabling the engineers to pinpoint possible trouble areas in need of further inquiry.
Insight
The Indiana State Fair Collapse Incident: Anatomy of a FailureNovember 01, 2012
On the evening of August 13, 2011 the Temporary Ground-Supported Structure Used to Cover the Stage Area and Support Equipment in the Production of Outdoor Entertainment Events located over the Grandstand Stage at the Indiana State Fair (the ISF Structure) collapsed while the audience was waiting for the headline act to begin. The incident resulted in the death of seven individuals and a multitude of serious injuries.
Insight
2-D Seismic Soil-Structure Interaction Study, Transbay Transit CenterSeptember 01, 2012
The Transbay Transit Center (TTC) will be located in downtown San Francisco, California, and will serve 11 transportation systems including the future High Speed Rail. The proposed structure is 1,500 feet long, and consists of 6 stories, including below-grade trainbox and 5.4 acre rooftop park. Series of two-dimensional seismic soil-structure interaction (SSI) analyses were performed, including fully-coupled direct solution approach as well as substructuring approach. “Scattered” motions, soil springs and dashpots were developed at different locations along the structure.
Insight
Experimental study on hydrogen explosions in a full-scale hydrogen filling station modelJune 07, 2007
In order for fuel cell vehicles to develop a widespread role in society, it is essential that hydrogen refuelling stations become established. For this to happen, there is a need to demonstrate the safety of the refuelling stations. The work described in this paper was carried out to provide experimental information on hydrogen outflow, dispersion and explosion behaviour. In the first phase, homogeneous hydrogen–air mixtures of a known concentration were introduced into an explosion chamber and the resulting flame speed and overpressures were measured.