[1] Univ Kansas, Civil Environm & Architectural Engn Dept, Lawrence, KS 66045 USA
[2] Univ Tsukuba, Fac Engn Informat & Syst, Div Engn Mech & Energy, Tsukuba, Ibaraki, Japan
[3] Int Telemat Univ Uninettuno, Engn Fac, Corso Vittorio Emanuele II, I-00186 Rome, Italy