1. Professor, Dept. of Civil Engineering, Indian Institute of Technology, Bombay, Mumbai 400076, India.
2. Associate Professor, Dept. of Architectural Engineering, Pennsylvania State Univ., University Park, PA 16802.
3. Professor, Dept. of Engineering Science and Mechanics, Pennsylvania State Univ., University Park, PA 16802.
4. Graduate Student, Dept. of Civil Engineering, Indian Institute of Technology, Bombay, Mumbai 400076, India.
5. Formerly, Graduate Student, Dept. of Civil Engineering, Indian Institute of Technology, Bombay, Mumbai 400076, India.