1. Ph.D. Researcher, Dept. of Civil and Environmental Engineering, Pontifical Catholic Univ. of Rio de Janeiro, 22430-06, Rio de Janeiro, Brazil (corresponding author).
2. Associate Professor, Dept. of Civil and Environmental Engineering, Pontifical Catholic Univ. of Rio de Janeiro, 22430-06, Rio de Janeiro, Brazil.
3. Professor and William J. Murray Fellow in Engineering, Dept. of Civil, Architectural and Environmental Engineering, Univ. of Texas at Austin, Austin, TX 78712.