1. Assistant Professor, Dept. of Civil and Environmental Engineering, Florida International Univ., 10555 West Flagler Street, Miami, FL 33174 (corresponding author).
2. Adjunct Professor, Technological Univ. of Panamá, Campus Victor Levi Sasso, Vía Centenario Ancón, Panamá, Panama.
3. Laboratory Manager, Simpson Gumpertz & Heger, 41 Seyon St., Waltham, MA 02453.
4. Professor, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Texas at Austin, 301 E. Dean Keeton St., Stop C1700, Austin, TX 78712-0273.