LI Kai1,HAN Yan1?覮,CAI Chunsheng1,2,FAN Zhongwu3,LIN Chao3
(1. School of Civil Engineering,Changsha University of Science & Technology,Changsha 410114,China; 2. Department of Civil and Environmental Engineering,Louisiana State University,Baton Rouge LA70803,USA; 3. Bridge Management Office of Aizhai Bridge,Hunan Expressway Group Co Ltd,Jishou 416000,China)