USAID:10.1061/(ASCE)0733-9496(1999)125:4(205) USAID:10.1061/(ASCE)0733-9496(2001)127:1(68) USAID:10.1061/(ASCE)0733-9496(2004)130:1(44) USAID:10.1061/(ASCE)IR.1943-4774.0000595 USAID:10.1061/(ASCE)IS.1943-555X.0000078