1. School of Civil & Environmental Engineering, Nanyang Technological University, Blk N1, 50 Nanyang Ave., Singapore 639798, Singapore
2. School of Civil & Environmental Engineering, Nanyang Technological University, Blk N1, 50 Nanyang Ave., Singapore 639798, Singapore (Corresponding author), e-mail: cecleong@ntu.edu.sg, https://orcid.org/0000-0002-0941-0984