1. School of Civil Engineering & Institute of Mechanics and Technology, Xi’an University of Architecture and Technology, Xi’an, People’s Republic of China;
2. State Key Laboratory for Mechanical Structure Strength and Vibration, Xi'an Jiaotong University, Xi'an, People’s Republic of China;
3. MOE Key Laboratory for Multifunctional Materials and Structures, Xi'an Jiaotong University, Xi'an, People’s Republic of China