1. Civil Engineer, School of Engineering, Pontificia Universidad Catolica de Chile, Santiago, Chile; and Adjunct Professor, School of Civil Engineering, Universidad Diego Portales, Ejército 441, 8370191, Santiago, Chile.
2. Civil Engineer, Assistant Professor, School of Civil Engineering, Universidad Diego Portales, Ejército 441, 8370191, Santiago, Chile.
3. Civil Engineer, Assistant Professor, School of Engineering, Pontificia Universidad Catolica de Chile, Casilla 306, Correo 22, 6904411, Santiago, Chile (corresponding author).