Affiliation: | a Division of Applied Mechanics, School of Mechanical and Production Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 2263 b Department of Civil Engineering, The University of Queensland, St. Lucia, Queensland, Australia 4072 c Department of Civil Engineering, National University of Singapore, Kent Ridge, Singapore 0511 d Department of Civil Engineering, The University of Queensland, St. Lucia, Queensland, Australia 4072 |