1. Lecturer, Dept. of Civil and Environmental Engineering, Univ. of the Witwatersrand, Johannesburg, Gauteng 2000, South Africa (corresponding author). ORCID: .
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of the Witwatersrand, Johannesburg, Gauteng 2000, South Africa.
3. Structural Engineer, Mott MacDonald PDNA, Johannesburg, Gauteng 2090, South Africa.
4. Chief Researcher, Built Environment, Council for Scientific and Industrial Research, Pretoria, Gauteng 0001, South Africa.
5. M.Sc. Student, Dept. of Civil and Environmental Engineering, Univ. of the Witwatersrand, Johannesburg, Gauteng 2000, South Africa.