[Hu, Qigao;Cui, WeiFeng;Gao, Jingwei] Natl Univ Def Technol, Coll Basic Educ Commanding Officers, Changsha 410072, Hunan, Peoples R China.^[Zhao, Feiwei] Ganxi Civil Engn Survey & Design Inst, Yichun, Jiangxi, Peoples R China.^[Liang, Qianfu] Coll Civil Engn & Mech, Cent S Univ Forestry & Technol, Changsha, Hunan, Peoples R China.