1. State Key Laboratory of Nonlinear Mechanics; Institute of Mechanics; Chinese Academy of Sciences; Beijing 100190 China
2. Institute of Solid Mechanics; Beihang University (BUAA); Beijing 100191 China
3. School of Engineering Science; University of Chinese Academy of Sciences; Beijing 100049 China
4. State Key Laboratory of Structural Analysis for Industrial Equipment; Department of Engineering Mechanics and International Research Center for Computational Mechanics; Dalian University of Technology; Dalian 116024 China
5. Department of Civil and Environmental Engineering; Northwestern University; Evanston IL 60208 USA