1. Assistant Professor, Dept. of Civil and Environmental Engineering, Advanced Technology for Large Structural Systems (ATLSS) Engineering Research Center, Lehigh Univ., Bethlehem, PA 18015-4729.
2. Professor and The Fazlur R. Khan Endowed Chair of Structural Engineering and Architecture, Dept. of Civil and Environmental Engineering, Advanced Technology for Large Structural Systems (ATLSS) Engineering Research Center, Lehigh Univ., Bethlehem, PA 18015-4729 (corresponding author).