1. Professor, Dept. of Civil and Environmental Engineering, Universidad de Los Andes, Carrera 1 Este 19A-40, Bogotá 117111, Colombia (corresponding author).
2. Professor and the Fazlur R. Khan Endowed Chair of Structural Engineering and Architecture, Dept. of Civil and Environmental Engineering, Center for Advanced Technology for Large Structural Systems (ATLSS Research Center), Lehigh Univ., 117 ATLSS Dr., Bethlehem, PA 18015-4729.
3. Associate Professor, Dept. of Civil and Environmental Engineering, Rice Univ., 6100 Main St. MS 318, 214 Ryon Laboratory, Houston, TX 77005.
4. Assistant Professor, School of Civil and Environmental Engineering, College of Engineering, Architecture and Technology, Oklahoma State Univ., 207 Engineering South, Stillwater, OK 74078-5033.