1. Department of Civil and Environmental Engineering, University of Illinois at Urbana−Champaign. Newmark Civil Engineering Laboratory, 205 N. Mathews Ave., Urbana, Illinois 61801, United States
2. Department of Civil and Environmental Engineering, Colorado School of Mines. 1500 Illinois St., Golden, Colorado 80401, United States
3. National Bioenergy Center, National Renewable Energy Laboratory. 15013 Denver West Parkway, Golden, Colorado 80401, United States
4. Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder. 4001 Discovery Drive, Boulder, Colorado 80309, United States