Abbett Distinguished Seminar Series

Resilience-Informed Guidance Through Modeling and Interdisciplinary Field Studies


Present: 
 April 19th, 11:00 AM Central Time
Speaker: Dr. John W. van de Lindt, Colorado State University

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ABSTRACT

The study of community resilience requires modeling of each sector across a community, but the sectors must interact, often representing contributions from different scientific disciplines.  This type of complex modeling requires the analyst to not only have an understanding of disciplines outside of engineering but to actively work and engage with key experts in sociology/planning and economics.  This presentation will begin with an overview of the Center for Risk-Based Community Resilience Planning’s approach to merge engineering, social science/planning, and economics to form the Interdependent Networked Community Resilience Modeling Environment (IN-CORE).  This includes learning from an interdisciplinary longitudinal field study beginning in 2016 to present for flooding in Lumberton, NC, including challenges posed by a second hurricane and the pandemic on data collection and interpretation.  The presentation will close with an illustrative example application of a community planning for tornado hazard and an example of resilience-informed policy guidance.             



SPEAKER

Dr. John W. van de Lindt is the Harold H. Short Endowed Chair Professor in the Department of Civil and Environmental Engineering at Colorado State University. Over the last two decades van de Lindt’s research program has focused on performance-based engineering and test bed applications of building and other systems for earthquakes, hurricanes, tsunamis, tornadoes and floods.  Professor van de Lindt is the Co-director for the National Institute of Standards and Technology-funded Center of Excellence (COE) for Risk-Based Community Resilience Planning headquartered at Colorado State University entering its seventh year.  He has published more than 400 technical articles and reports including more than 200 journal papers, and currently serves as the Editor-in-Chief for the ASCE Journal of Structural Engineering.

Past Seminars

The Evolution of Structural column testing methods-a new loading equipment MUST


Present: 
 April 3rd, 2020, 2:00 PM Central Time at Butler-Carlton Hall
Speaker: Dr. Yan Xiao, University of Illinois at Urbana-Champaign

ABSTRACT

Columns are the most important structural elements in buildings and bridges to transfer the gravity loads to foundation and to resist any lateral loads. Particularly in the case of earthquakes or other accidental events, structural columns need to be designed to resist strong lateral loading effects while maintaining a sound support of the gravity load. Approximately from the mid-fifties of last century, experimental studies on structural columns subjected to the lateral load dominant loading condition became one of the most important research areas. This presentation reviews the development and evolution of the testing methods for experimentally studying behaviors of structural columns. Following the needs of testing larger scale columns, the axial loading becomes a challenge. The presentation discusses the problems in conventional methods for axial loading in seismic simulation tests. It was from the examination of the problems in existing axial loading methods that the presenter has conceived and developed a new type of large-scale structural testing system MUST (Multiple Usage Structural Testing equipment). The new equipment has the advantages of maintaining the axial loading to be perpendicular to the lateral loading and the actual forces applied to the model specimen can be directly monitored, thus overcoming the problems in conventional testing systems. The first MUST system (2d-MUST, shown in Fig.1a) was installed at the Hunan University, which possesses the vertical loading capacity of 20000kN and the lateral loading capacity of 4000kN. The second MUST system (3d-MUST, Fig1b) completed at Nanjing Tech Univ. has capacities of 10000kN in vertical, and 3000kN in two horizontal directions), capable for three directional pseudo-dynamic simulation. The presentation also discusses the testing results of eight full-scale large-size wide-flange steel columns using the 2d-MUST equipment.

SPEAKER

Dr. Y. Xiao is a Changjiang/Qianren Distinguished Professor and serves as the Program Director for Energy, Environment and Infrastructure Sciences, in the Zhejiang University – University of Illinois at Urbana-Champaign Joint Institute (ZJUI), Zhejiang University. Dr. Xiao received his Bachelor of Engineering degree from the Tianjin University, China, in 1982, his Master and Doctor of Engineering degrees from the Kyushu University, Japan, in 1986 and 1989, respectively. Prof. Xiao’s professional and academic experiences include assistant research scientist at University of California, San Diego, tenure-track and tenured full professor at the University of Southern California. He was previously the dean of Civil Engineering College at Nanjing Tech University (2015-2018), and the Hunan University (2006-2015). He serves as the associate editors for the ASCE Journal of Structural Engineering, Journal of Bridge Engineering, and editorial board member of the Journal of Constructional Steel Research. He is an elected fellow of the American Society of Civil Engineers (ASCE) and American Concrete Institute (ACI). He is a registered Professional Engineer in California.

 

Prof. Xiao’s scholarly contributions are in areas related to confined concrete, hybrid and composite structures, applications of advanced composites, retrofit/repair of structures, impact effects, and large-scale experimentation, etc. His recent research and industrial efforts are focused on developing modern bamboo structures for buildings and bridges with the goal of promoting environmentally and eco-friendly construction. He holds the award winning technology of GluBam.

DIFFUSION AND UNIFORMITY OF RECYCLED ASPHALT IN PAVEMENTS


Present: 
 December 4th, 2019, 2:30 PM Central Time at 121 Butler-Carlton Hall
Speaker: Dr. Baoshan Huang, University of Tennessee-Knoxville

ABSTRACT

Asphalt pavements covers over 93 percent of the paved roads in the United States. The use of recycled asphalt into pavement maintenance and construction has been a common practice. However the lack of understanding of the interaction between recycled and virgin asphalt poses a change on the efficient use of recycled asphalt, and often causes pavement premature failures. The present study addressed some fundamental aspects associated with the beneficial use of recycled asphalt into asphalt paving mixtures: 1) how much recycled asphalt can be mobilized into a uniform asphalt coating in the mixture? and 2) will the mobilized old asphalt co-mingle with virgin asphalt to form a homogeneous material? Analytical chemical procedure and fluorescence microscopy (FM), and molecular dynamics simulation have been utilized for the analyses. The results have provided better understandings on the homogenization process between the recycled and virgin asphalt; thus provide better guidance to efficient use of recycled asphalt pavements.

SPEAKER

Baoshan Huang, Ph.D.,P.E, is the Edwin G. Burdette Professor of Civil Engineering at the University of Tennessee-Knoxville, where he has been employed since January 2002. He earned his Bachelor's and Master's Degrees at Tongji University in China and a Ph.D. at Louisiana State University. His areas of research include transportation infrastructure materials, pavement engineering, geotechnical engineering, and infrastructural asset management. Over the last fifteen years of his professional career, Dr. Huang has secured over ten million dollars of research funding to support his research activities. He has been actively involved in many professional committees, including the Transportation Research Board (TRB), Association of Asphalt Paving Technologists (AAPT), American Society of Civil Engineers (ASCE), and the International Society of Asphalt Pavement (ISAP). He was the chair of the ASCE Bituminous Materials Committee (BMC) during 2010-2012, and has been associate editors for the ASCE Journal of Materials in Civil Engineering, Journal of Transportation Engineering - Part B: Pavements, Journal of Cleaner Production, and serves in editorial boards for several international journals. Dr. Huang has published over 180 (SCI Indexed) journal papers and holds five US patents (one pending), one International patent, and three Chinese patents (two pending) on innovative infrastructure materials design and characterization.