[1] Iran Univ Sci & Technol, Sch Railway Engn, Tehran 16844, Iran
[2] Shahid Chamran Univ Ahvaz, Dept Civil Engn, Fac Engn, Ahvaz 6135783151, Iran
[3] Christchurch Polytech, Ara Inst Canterbury, Dept Engn & Architectural Studies, Christchurch 8140, New Zealand