Avoiding Disproportionate Collapse

Single Abstract

342697 - Numerical Simulation of Reinforced Concrete Bridge Columns under Combined Vehicle Impact and Blast

Friday, April 20
11:00 AM - 12:30 PM
Location: 202CD

Vehicle impact with bridge substructure units and subsequent blast place extreme demands on these important structural components, demands that can severely limit their ability to maintain a safe level of operation and could lead to their failure and catastrophic collapse. In the public domain, limited studies have been conducted that investigate the response of bridge substructure units subjected to combined impact and air blast. An ongoing numerical study focused on examining the response of a bridge column subjected to vehicle impact and subsequent blast is summarized herein. Modeling is completed using LS-Dyna and single, circular reinforced concrete columns of varying slenderness along with supporting foundation systems and soils surrounding those foundations are studied. The vehicle selected for the study is Ford F800 single-unit truck and analyses are completed under its initial impact followed by a secondary blast. Specifically, this paper will focus on explaining analysis techniques in greater detail along with summarizing the results of using two simulation techniques to model the blast: (1) an Arbitrary Lagrangian-Eulerian (ALE) method available in LS-Dyna; and (2) a hybrid approach that couples finite elements modeling with Smoothed Particle Hydrodynamics (SPH) that simulates the blast and the near-field soil region around the column. Results from the study will help determine the accuracy with which these two simulation techniques predict structural response and failure.

Chen Fang

Ph.D. student
University of Nebraska-Lincoln

My name is Chen Fang. I am a Ph.D. student working with my advisor, Dr. Daniel Linzell, at the University of Nebraska-Lincoln. My research fucoses on structural resistance and hardening of reinforced concrete bridge column subjected to vehicle collision and explosion. I also have the research experience on the behaviors of composite structures and steel structures under different loads.

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Daniel Linzell

Voelte-Keegan Professor and Chair
University of Nebraska-Lincoln

Dr. Daniel G. Linzell, P.E., F.ASCE, is the Voelte-Keegan Professor and Chair of the Department of Civil Engineering at the University of Nebraska-Lincoln. From 1999 until June of 2013, he was a faculty member in the Department of Civil and Environmental Engineering at the Pennsylvania State University, most recently serving as the John A. and Harriette K. Shaw Professor of Civil Engineering and Director of the Protective Technology Center. He received his Ph.D. from the Georgia Institute of Technology in 1999, his M.S. in Civil Engineering from Georgia Tech in 1995 and a B.S. in Civil Engineering from Ohio State University in 1990. He served as a visiting professor at the University of Navarra in San Sebastian, Spain, during the 2008-09 academic year. Dr. Linzell has published nearly 60 peer-reviewed, journal articles that have focused on: monitoring and predicting the behavior of bridges during construction and under service loads; protective barrier systems; building and bridge systems and components under blast and impact; and ship structural component performance. Prior to receiving his Ph.D., Dr. Linzell was employed by Burgess and Niple, Ltd. in Columbus Ohio where he performed condition and forensic structural inspections and rehabilitation designs. He currently sits on the Structural Stability Council’s Executive Committee, is a Member of the Transportation Research Board’s Steel Bridge Committee and of the American Society of Civil Engineer’s Composite Construction and Bridge and Tunnel Security Committees. He is a licensed Professional Engineer.

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342697 - Numerical Simulation of Reinforced Concrete Bridge Columns under Combined Vehicle Impact and Blast



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