1. Postdoctoral Fellow, Centre for Research in Computational and Applied Mechanics, Univ. of Cape Town, Private Bag X3, Rondebosch, Cape Town 7701, South Africa. ORCID:
2. Associate Professor, Dept. of Civil Engineering, Univ. of Cape Town, Private Bag X3, Rondebosch, Cape Town 7701, South Africa (corresponding author).