1. Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Dr. 2, Block E1-05-12, Singapore 119260, Singapore, https://orcid.org/0000-0003-3486-9057
2. Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Dr. 2, Block E1-05-12, Singapore 119260, Singapore (Corresponding author), e-mail: sc.chian@nus.edu.sg
3. Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, 550 Stadium Mall Dr., West Lafayette, IN 47907, USA